Siddhartha Roy explores calcium carbonate’s (CaCO3) role
in filler applications, with a look at processes around the
world with regard to PVC pipes in India and China.
Pvc compounding ingredients, The essential IngredientsSiddhartha Roy
Siddhartha Roy covers PVC Compounding technology, the essential ingredients and their role in formulating a successful PVC Compounds. A must read for beginners in PVC Compounding
Siddhartha Roy explores calcium carbonate’s (CaCO3) role
in filler applications, with a look at processes around the
world with regard to PVC pipes in India and China.
Pvc compounding ingredients, The essential IngredientsSiddhartha Roy
Siddhartha Roy covers PVC Compounding technology, the essential ingredients and their role in formulating a successful PVC Compounds. A must read for beginners in PVC Compounding
PVC volume cost, How to use Fillers judicouslySiddhartha Roy
Siddhartha Roy explains to concept of Volume Cost with respect to PVC Pipes and cautions against too much filler loading. Many PVC pipe firms have collapsed because the implications of Volume costs were not understood,
Article published in Modern Plastics and Polymers May 2011. The first part civers PVC Resin, Primary and secondary Plasticisers, Heat and Light Stabilisers.
Manufacture of Plastic Films, HDPE and Thermoset Plastics Ajjay Kumar Gupta
Manufacture of Plastic Films, HDPE and Thermoset Plastics (Bopp Films, Polyester Films, Polyolefins, Polypropylene, Vinyls, Polyvinyl Acetate, Expanded Films, Vinyl Ester Resins, Unsaturated Polyesters, Thermoset Polyurethanes, Polyurethane Coatings, Lamination, Thermoforming, Thermoplastic Polymers)
Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a “sheet”. These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces.
Plastic films are used in a wide variety of applications. These include: packaging, plastic bags, labels, building construction, landscaping, electrical fabrication, photographic film, film stock for movies, video tape, etc.
See more
https://goo.gl/5pMkUl
https://goo.gl/7PxKYG
https://goo.gl/jw5rJa
Contact us:
Niir Project Consultancy Services
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
Volatiles From Plastic Manufacturing Process, Production of Plastic Films, Plastic Manufacturing Process, Plastic Extrusion and Manufacturing Process, Plastic Extrusion Process, Plastic Film Manufacturing, Production Process of Plastic Film, Plastic Film and Extrusion Equipment, Thermoset Plastic Manufacturing Process, Plastic Film Manufacture, Production of Plastic Films, Process for Production of Plastic Films, Plastic Films Production, Plastic Film Manufacturing Business Plan, Business Plan on Plastic Film Manufacturing, Starting Plastic Film Manufacturing Business, Profitable Plastic Film Manufacturing Business, Start Small Plastic Film Manufacturing Business, High Density (HDPE) Production, High Density Polyethylene Manufacturing Process, Manufacturing Process for HDPE, HDPE/PP Bags Manufacturing Plant, Thermoset Processing, Plastic Manufacturing Methods, Thermoplastic Processing Methods, How are Thermosetting Plastics Made, Methods of Manufacturing Thermoplastic, Thermosetting Plastics, Manufacturing Process of Thermosetting Plastics, Business Plan on Thermosetting Plastics Manufacturing, Starting Thermosetting Plastics Manufacturing Business, Thermosetting Plastics Manufacturing Business, Thermosetting Plastics Manufacturing Business Plan, How to Start Thermosetting Plastics Manufacturing Industry, Thermoplastic and Thermoset Processing Methods, BOPP Film Production Line, BOPP Film Production, Biaxially Oriented Polypropylene Films, Bopp Film Manufacturing Process, Bopp Film Plant, Biaxially Oriented Film Production, BOPP Film Production Plant, Extrusion of Film, Water Cooled Polypropylene Film, Plastics Net From Film, Pouch Making Equipment, Sachet Making Machines, Process for Manufacturing Unsaturated Polyester Resins
Polyvinyl Alcohol (PVA) Manufacturing Industry. The Global Polyvinyl Alcohol (PVA) Market is expected to Reach USD 1.21 Billion by 2025
Polyvinyl alcohol, also known as PVOH, PVA, or PVAL, is a synthetic polymer that is soluble in water. It is effective in film forming, emulsifying, and has an adhesive quality. It has no odor and is not toxic, and is resistant to grease, oils, and solvents. It is ductile but strong, flexible, and functions as a high oxygen and aroma barrier.
Polyvinyl Alcohol (PVA) is produced by polymerization of vinyl acetate monomer followed by hydrolysis. PVA finds application in various end-use industries such as food packaging, paper, textile, construction, coatings, and pharmaceutical. Polyvinyl Alcohol exhibits resistance to moisture and therefore, is predominantly used in the food packaging. Due to high water solubility and biodegradability, PVA has increasingly been used in the packaging industry.
Uses:
Polyvinyl Alcohol use is growing in packaged food products due to the benefits associated with it such as film forming and retention of taste & texture of the product. It is also used in the nutritional supplement pills, tablets and capsules owing to its viscosity. Polyvinyl alcohol is used as an additive in mortar and cement in order to increase of their cohesion and fluidic properties, reducing the drying time for the concrete surface. This increases the coating adaptability and prevents concrete cloth from chapping.
See more
https://goo.gl/4tzJSk
https://goo.gl/wQUsM1
Contact us:
Niir Project Consultancy Services
An ISO 9001:2015 Company
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
#Manufacture_of_Polyvinyl_Alcohol, #Polyvinyl_Alcohol_(PVA), #Polyvinyl_Alcohol_Production, #Preparation_of_Polyvinyl_Alcohol_(PVA), Poly (Vinyl Alcohol) (PVA), #Production_of_Polyvinyl_Alcohol, Manufacturing of Polyvinyl Alcohol, #Polyvinyl_Alcohol_Manufacturing_Plant, Polyvinyl Alcohol, Also Known as PVOH, PVA, or PVAL, Properties and Applications of Polyvinyl Alcohol, Manufacturing Process and Application of Polyvinyl Alcohol, Polyvinyl Alcohol (PVA) Manufacturing Process, Polyvinyl Alcohol Uses, Polyvinyl Alcohol Production Business, Process for the Manufacture of Polyvinyl Alcohol, Chemical Compound, Polyvinyl Alcohol Manufacturing Unit, Manufacture of Polyvinyl Alcohol, #Project_Report_on_Polyvinyl_Alcohol_(PVA)_Manufacturing_Industry, #Detailed_Project_Report_on_Polyvinyl_Alcohol_(PVA)_Manufacturing, Project Report on Polyvinyl Alcohol Production, #Pre_Investment_Feasibility_Study_on_Polyvinyl_Alcohol_Production, Techno-Economic feasibility study on Polyvinyl Alcohol (PVA) Manufacturing, #Feasibility_report_on_Polyvinyl_Alcohol_Production,
PVC volume cost, How to use Fillers judicouslySiddhartha Roy
Siddhartha Roy explains to concept of Volume Cost with respect to PVC Pipes and cautions against too much filler loading. Many PVC pipe firms have collapsed because the implications of Volume costs were not understood,
Article published in Modern Plastics and Polymers May 2011. The first part civers PVC Resin, Primary and secondary Plasticisers, Heat and Light Stabilisers.
Manufacture of Plastic Films, HDPE and Thermoset Plastics Ajjay Kumar Gupta
Manufacture of Plastic Films, HDPE and Thermoset Plastics (Bopp Films, Polyester Films, Polyolefins, Polypropylene, Vinyls, Polyvinyl Acetate, Expanded Films, Vinyl Ester Resins, Unsaturated Polyesters, Thermoset Polyurethanes, Polyurethane Coatings, Lamination, Thermoforming, Thermoplastic Polymers)
Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a “sheet”. These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces.
Plastic films are used in a wide variety of applications. These include: packaging, plastic bags, labels, building construction, landscaping, electrical fabrication, photographic film, film stock for movies, video tape, etc.
See more
https://goo.gl/5pMkUl
https://goo.gl/7PxKYG
https://goo.gl/jw5rJa
Contact us:
Niir Project Consultancy Services
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
Volatiles From Plastic Manufacturing Process, Production of Plastic Films, Plastic Manufacturing Process, Plastic Extrusion and Manufacturing Process, Plastic Extrusion Process, Plastic Film Manufacturing, Production Process of Plastic Film, Plastic Film and Extrusion Equipment, Thermoset Plastic Manufacturing Process, Plastic Film Manufacture, Production of Plastic Films, Process for Production of Plastic Films, Plastic Films Production, Plastic Film Manufacturing Business Plan, Business Plan on Plastic Film Manufacturing, Starting Plastic Film Manufacturing Business, Profitable Plastic Film Manufacturing Business, Start Small Plastic Film Manufacturing Business, High Density (HDPE) Production, High Density Polyethylene Manufacturing Process, Manufacturing Process for HDPE, HDPE/PP Bags Manufacturing Plant, Thermoset Processing, Plastic Manufacturing Methods, Thermoplastic Processing Methods, How are Thermosetting Plastics Made, Methods of Manufacturing Thermoplastic, Thermosetting Plastics, Manufacturing Process of Thermosetting Plastics, Business Plan on Thermosetting Plastics Manufacturing, Starting Thermosetting Plastics Manufacturing Business, Thermosetting Plastics Manufacturing Business, Thermosetting Plastics Manufacturing Business Plan, How to Start Thermosetting Plastics Manufacturing Industry, Thermoplastic and Thermoset Processing Methods, BOPP Film Production Line, BOPP Film Production, Biaxially Oriented Polypropylene Films, Bopp Film Manufacturing Process, Bopp Film Plant, Biaxially Oriented Film Production, BOPP Film Production Plant, Extrusion of Film, Water Cooled Polypropylene Film, Plastics Net From Film, Pouch Making Equipment, Sachet Making Machines, Process for Manufacturing Unsaturated Polyester Resins
Polyvinyl Alcohol (PVA) Manufacturing Industry. The Global Polyvinyl Alcohol (PVA) Market is expected to Reach USD 1.21 Billion by 2025
Polyvinyl alcohol, also known as PVOH, PVA, or PVAL, is a synthetic polymer that is soluble in water. It is effective in film forming, emulsifying, and has an adhesive quality. It has no odor and is not toxic, and is resistant to grease, oils, and solvents. It is ductile but strong, flexible, and functions as a high oxygen and aroma barrier.
Polyvinyl Alcohol (PVA) is produced by polymerization of vinyl acetate monomer followed by hydrolysis. PVA finds application in various end-use industries such as food packaging, paper, textile, construction, coatings, and pharmaceutical. Polyvinyl Alcohol exhibits resistance to moisture and therefore, is predominantly used in the food packaging. Due to high water solubility and biodegradability, PVA has increasingly been used in the packaging industry.
Uses:
Polyvinyl Alcohol use is growing in packaged food products due to the benefits associated with it such as film forming and retention of taste & texture of the product. It is also used in the nutritional supplement pills, tablets and capsules owing to its viscosity. Polyvinyl alcohol is used as an additive in mortar and cement in order to increase of their cohesion and fluidic properties, reducing the drying time for the concrete surface. This increases the coating adaptability and prevents concrete cloth from chapping.
See more
https://goo.gl/4tzJSk
https://goo.gl/wQUsM1
Contact us:
Niir Project Consultancy Services
An ISO 9001:2015 Company
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
#Manufacture_of_Polyvinyl_Alcohol, #Polyvinyl_Alcohol_(PVA), #Polyvinyl_Alcohol_Production, #Preparation_of_Polyvinyl_Alcohol_(PVA), Poly (Vinyl Alcohol) (PVA), #Production_of_Polyvinyl_Alcohol, Manufacturing of Polyvinyl Alcohol, #Polyvinyl_Alcohol_Manufacturing_Plant, Polyvinyl Alcohol, Also Known as PVOH, PVA, or PVAL, Properties and Applications of Polyvinyl Alcohol, Manufacturing Process and Application of Polyvinyl Alcohol, Polyvinyl Alcohol (PVA) Manufacturing Process, Polyvinyl Alcohol Uses, Polyvinyl Alcohol Production Business, Process for the Manufacture of Polyvinyl Alcohol, Chemical Compound, Polyvinyl Alcohol Manufacturing Unit, Manufacture of Polyvinyl Alcohol, #Project_Report_on_Polyvinyl_Alcohol_(PVA)_Manufacturing_Industry, #Detailed_Project_Report_on_Polyvinyl_Alcohol_(PVA)_Manufacturing, Project Report on Polyvinyl Alcohol Production, #Pre_Investment_Feasibility_Study_on_Polyvinyl_Alcohol_Production, Techno-Economic feasibility study on Polyvinyl Alcohol (PVA) Manufacturing, #Feasibility_report_on_Polyvinyl_Alcohol_Production,
This seminar explains all the sealers which are used in dentistry.
It also stresses on the removability in cases of re-treatmeant.
It gives an insight on the sealers interaction with various intracanal medicaments and irrigants.
2011-2014 pass out batch from CIPET Lucknow . project work on portable pipe system ,which included pipe types , compounding , processing method , trouble shooting , and testing , .Thank you for watching.
Endodontic sealers a summary and a quick review Rami Al-Saedi
a slideshow presentation lectured and presented in Al-Sadr Specialized dental center in the continuing dental learning weekly lectures.
Rusafa medical institute- Baghdad- Iraq
lecturer: Dr. Rami Ahmed Jumaah (BDS)
Supervisor: Dr. Iman J. Ahmed (BDS: MSc)
The role of Calcium Carbonate as a filler in Polymers.
Mineral fillers offer cost reduction – and sometimes enhanced properties – to polymer
formulations. Siddhartha Roy outlines ground calcium carbonate’s changing role in the
growing polymer market
Similar to Development of one pack stabiliser systems (20)
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Epistemic Interaction - tuning interfaces to provide information for AI support
Development of one pack stabiliser systems
1. Development of One Pack Stabilisers for PVC in
India.
Introduction to Stabilisers:
Stabilisers:
The PVC molecule is unstable to heat and light. Heating PVC causes breakage of the
Polymer chains, liberating Hydrochloric Acid gas. The HCl catalyses more degradation
and the degradation can become explosive, releasing large quantities of corrosive HCl
and other toxic gases. Exposure to Ultraviolet Radiation also breaks up Polymer chains
but is much slower than Heat degradation.
Heat Stabilisers:
To process PVC, it has to be stabilised against the action of Heat required at processing
temperatures. Most Stabilisers contain metal elements which react with HCl and inhibit
further degradation. They are Metal Salts, Soaps or Complexes. Stabilisation of PVC is a
vast subject, and they are the second most important ingredient in UPVC Formulations
and after Plasticisers in a Flexible PVC formulation. Some of the most important families
are:
Type Form PHR
used
Clarity Toxicity Odour Cost
/Kg
Leads Powder 2 -4 Opaque Toxic None ~ Rs
120-150
Ba- Cd Liquid 1.5 – 2.5 Clear Very
Toxic
Slight ~ Rs
200
Ba - Zn Liquid 2 - 3 Clear Toxic Slight ~ Rs
190
Cd - Zn Liquid 2 - 3 Clear Toxic Slight ~ Rs
220
Ca - Zn Liquid 3 -4 Clear Non-
Toxic
Negl. ~ Rs
250
Tins Liquid 0.5 -1 Crystal T & Non Strong ~ Rs
350
The correct choice of stabilisers for the target application is best done in consultation with the
stabilizer supplier and technical service cells of PVC Resin suppliers, However, as a guideline
the following table would be useful.
2. Stabiliser application areas:
Type Heat Stability Main Applications Not recommended for
Leads Very Good, esp.
long term.
Cables, Pipes &
Fittings, Sleeves,
Profiles. Cheapest.
Clear Application. Can
be toxic.
Tins Best Transparent tubings
and sheeting, High
quality Pipes, Medical
Causes sulphide
staining with Leads.
Costliest Stabiliser.
Cd - Zn Moderate ROHS Cables, Non-
Toxic. Pipes and
Extrusions.
For high heat history.
Ba- Cd Good Leather Cloth,
Calendared products,
Footwear.
Non Toxic applications
Cd - Zn Moderate Foamed Leather Cloth For high heat history.
Metallic
Stearates
Low Co-stabilisers with
lubricating action
Sole Stabiliser.
Newer families of heat Stabilisers are being offered with the background of Heavy Metal
environments contamination concerns. Organic Stabilisers and Calcium Zincs are in the
forefront of this trend.
Because of its relatively lower cost and strong Stabilisation action, Lead stabilisers have
historically been the most popular
• Lead Stabilisers: The common Lead Stabilisers are:
o TBLS- Tri Basic Lead Sulphate. A strong heat stabiliser as it has about 80%
PbO, the active ingredient in absorbing and neutralising the HCl before it
gets liberated on heating. It is non-lubricating and is opaque, cannot be
used in Transparent/Transluscent applications
o DBLS- Dibasic Lead Stearate. A Lubricating stabiliser very useful for
lubrication at the mixing and metering zone of the extruder. Translucent.
o LS- Lead Stearate. Weakest Lead stabiliser. Strong external lubricant
especially in the early extrusion stages. Translucent.
o There are other Lead stabilisers like Dibasic Lead Phosphite, used when Light
Stability is important and Dibasic Lead Phthalate, used for high speed
extrusions, but these are not being covered in this article, as they have
niche usage.
Calcium Stearate and Stearic acid are often used along with Lead stabilisers primarily to
balance the Lubrication. CS is a weak stabiliser but an excellent internal lubricant, very
effective in late stage lubrication at barrel discharge and die head. Stearic acid is a
strong external lubricant, Excessive use can lead to screw slippage and poor gelation.
3. Lead Content of Lead Stabilisers.
Name Lead
Content
Role PHR In PVC
Pipes
Tri-basic lead sulphate 82% Primary Stabiliser, Opaque 2-4
Di-basic lead stearate 51% Lubricating Stabilise
internal and External.
Translucent.
0.5-1
Normal lead stearate 28% Strong External Lubricant 0.5
Di-basic lead phosphite 78% Good light stabiliser also.
Used in exterior
applications like SWR Pipes.
Tetra-basic lead
sulphate
85% Strongest. Rarely used as
is costlier than TBLS,
One disadvantage that Lead stabilisation systems have is that a good, balanced
formulations require a combination of all the Lead stabilisers plus Calcium Stearate and
a few more lubricants. Other systems like Tins and Mixed metals are normally one grade
of Stabiliser and one or two lubricants. With Leads, careful weighing of six or seven
ingredients may be required, which requires skilled operation.
Lubricating Lead Based One Pack Systems
The Stabiliser mix for the high-volume PVC Pressure Pipes which I have used extensively
in the past till the one packs came on the scene, is given in my article on Volume Costs,
referred to in Page 6.
Single Component Pressure Pipe Formulation
Ingredient Density Kg/Ltr.
PHR
Kgs.
Volume
Ltrs.
PVC Resin K67 1.38 100
TBLS 7.2 0.8 0.111
DBLS 4.5 0.5 0.111
Lead Stearate 2.1 0.4 0.190
Ca. Stearate 1.1 0.4 0.364
Lubricant 0.95 0.3 0.316
Total Stabiliser/Lubricant. 2.4 1.092
Density
g/cc 2.198
You will note that the dosage recommendations of the regular grades of one packs for
PVC Pipes offered by leading manufacturers start at about 2.2 to 2.4 PHR. This matches
up with the dose of 5-6 ingredients above and is the basis of the convenient one pack
systems.
The initial one packs offered were premixed single component stabilisers. The desired
quantity was weighed out into packets according to the amount of Resin charged per
batch. This is in line with the practice followed inhouse, but separate weighing of 5-6
ingredients was prone to weighing inaccuracies, especially of the minor ingredients. The
4. stabiliser manufacturers used to mix the one pack recipes in bulk, and the mix was then
meter measured and packed in easy to use packets, say for 25 kgs. PVC, 50 kgs, etc.
There was a lot of resistance to this concept in the early eighties. My personal
experience is that having formulated with single stabilisers for nearly a decade at
Shriram and PRC (DCW), I was introduced to the convenience of One pack systems
when I went to Kuwait. The One packs from Baerlocher GMBH were an eye opener, and
I wanted to introduce the concept in India when I returned to India in 1978 and joined
Waldies, a prominent Lead oxides and PVC stabiliser company.
At that time, PVC Pipe markets was starting to grow rapidly with the leaders like Wavin,
Finolex, Garware and Chemplast using large capacity imported extruders, while most the
others were equipped with the venerable Windsor RC-100. Remember, at that time, PVC
Pipes of the popular sizes up to 110 mm were reserved for small scale, and only the RC-
100 (meaning 100 lbs/hr, about 40 kgs/hr) could be afforded by many who were
entering the field as small-scale industries.
At that time, the PVC recipes for pipes were a closely guarded secret, controlled by the
plant technical heads. Much to the dismay of my friend Mr. Anil Anand of ALA and
myself, who were trying to push the one pack concept, we found that the technical
chiefs were not at all interested in switching to the ease of a preformulated one pack. It
would seriously reduce their importance in their companies!!
There was another factor working against the type of efficient one pack systems
available abroad in the early eighties. The RC-100s with their co-rotating screws and low
outputs and high residence times, required higher dosages, sometimes 4-5 PHR and had
to be formulated like single screw extruders recipes. As the PVC pipe industry had
started with small diameter conduits, many single screw extruders were pressed into
service for water pipe. Even Chemplast were using large single screw extruders as per
their American processing DNA. Added to the higher stabilisation costs, expensive flow
promoters were needed for single screw pipes to match the strength of pipes made on
the new imported Counter Rotating twin screw extruders.
The industry rapidly shifted to the imported Twin Screw extruders from companies like
Cincinnati and Kraus Maffei, Battenfeld etc., and as the Pipe market was booming
because of the WHO funded drinking water projects. The extruders were actually
airlifted, such was the demand.
Later in the 80s and early nineties, with more number of modern high output extruders
being the norm, the one pack concept started taking hold.
The next step from premixed powders was to safer handling, non-dusting forms. One big
drawback with handling Lead Stabilisers in the factory is susceptibility to lead poisoning
of workmen, if handling, housekeeping and dusting was not kept under control. Newer
one pack delivery systems were developed by heating the mix to about 160C so that the
Lubricants, Calcium Stearate, Lead Stearate and Dibasic Lead Stearate melted and
formed a dough with the non-melting TBLS. The dough was then extruded into pellets or
pressed and chipped into flakes. This form was much safer to handle and gradually
found acceptance.
This has been further refined by Stabiliser manufactures who start with Litharge (PbO).
They react this with carefully prepared proportions of Sulfuric Acid, Stearic acid and
some other lubricants like Calcium Stearate and special waxes. On completion of the
reaction, all the PbO is converted to TBLS, DBLS and LS as per the formulation
5. proportions. The reactor discharges to a rotating drum, where the paste is cooled and
flaked off.
Non-lubricating One packs leads do not have enough lubricants to coat all the solids
in the mix and are sold as powders. They are widely used for applications like Cables &
Wires, Profiles, both Rigid and Flexible sleevings, Injection Moulded fittings etc.
Special applications like PVC Window Profiles and Injection moulded fittings need some
more ingredients other than Stabilisers and lubricants like Impact Modifiers and Flow
promoters.
Window profiles require 3.5-5PHR impact modifier and 1.5-2PHR Flow Promoter. When
this is sold as a package in a one pack, the dosage must go up by 5-7PHR, that is
2.4+5=7.4 and 2.4+7= 9.4PHR. The price of the one pack goes up as the additives are
quite costly.
In Injection moulded fitting, which are processed on single screw extruders, a flow
promoter needs to be added. At 1.5PHR addition, the One pack dose goes up to 4PHR.
Again, the one pack will be costlier than the normal pipe one packs.
One packs can also be offered with properties like UV Resistance, Antioxidants etc. if
required. The one pack manufacturers invest a lot on developing the right lubricant mix
for an application and offer several grades for the same application of PVC pipes, like
Normal, Filled, Highly Filled, Single or Twin Screw etc. Even refinements like Conical and
Parallel screw suitability can be provided. The price of the One pack would vary with the
special ingredients chosen.
Dosage and Pricing
In the extremely competitive field of PVC pipe, where the demand is for cheaper and
cheaper inputs, CaCO3 fillers get added to the one pack to drop the price, However, to
maintain the same stabilising efficiency, the one pack PHR has to be increased by the
amount of inert filler added. This if 1 kg extra of filler is added, no doubt the price will go
down, but the dosage goes up by 2.4+1=3.4. As most processors clamouring for
cheaper one packs are making highly filled pipes, the one pack must be further boosted
to maintain the same % of active PbO as in standard formulations.
The implications of adding fillers to cheapen One packs must be clearly understood, as
Per Kg cost reduction is not the only factor.
Here are some examples:
6. In this example, I have started with a standard PVC Pipe one pack. If an economical
filler containing One pack is used, the starting point will be 3.2 PHR instead of 2.4PHR,
and by the time filler loading reaches 100 PHR, the loading must be nearly doubled for
trouble free operation. A common mistake by processors is to stick to the same PHR
used in BIS Pipes as they increase filler. This drops the active PbO content and
lubrication balance and can lead to severe processing problems.
A study has to be made by multiplying the One pack cost per Kilo and the addition level
required in PHR to arrive at the stabilisation cost per 100 PHR Resin to determine how
effective they are in cost reduction.
The amount of filler addition, especially at higher dosages will bring down the cost. But
what is important is that whether the stabilisation cost is lower with the Standard or
economical One packs.
Another factor which is important is the volume cost, for which the density of each
ingredient is crucial. Anything added with a density more than PVC will increase the
density (Like One Packs, Fillers, TiO2)
For accurate density calculations and assessment, the actual density of all the
ingredients must be known. The one pack density is important as this figure is not
usually given in Technical Data sheets.
For further clarity on the effect of Density and filler loading, please refer to my article
http://www.plastemart.com/plastic-technical-articles/Volume-Cost-and-its-importance-
in-Plastic-applications/1561 or http://www.slideshare.net/SiddharthaRoy11/siddhartha-
roy-pvc-volume-cost
Calcium Zinc One Packs.
With the world moving away from Lead stabilisers. Calcium Zinc systems are becoming
prominent for manufacturing Lead Free Pipes and where ROHS requirements are to be
met.
Calcium Stearate is the most common non-Lead stabiliser. However, its stabilising power
is quite low and is more viewed as a very effective Internal Lubricant, playing a major
role in Lubrication at the die head for smooth extrusion and finish.
Calcium Soaps have been combined with Zinc compounds and the resultant Calcium Zinc
Stabilisers have steadily improved in stabilisation efficiency. Driven by the intensive R&D
of the stabiliser industry, Calcium Zincs are rivalling Leads in dosages, 3PHR vs 2.4PHR.
The lubrication systems are quite complex in Calcium Zinc systems for boosting the
efficiency, so many of the Calcium Zinc grades are available as one packs and not
individual components.
The other major Stabilisation system is with Tins, very popular in the Americas, as they
were very effective with single screw extruders, which was the norm there before the
Americas also switched over to Twin screw.
Tin Stabilisers like, the Mercaptide family, are all liquids. This does not make it
conducive for a one pack delivery system. Normally Tin Stabilised pipes are made with
single components, with the lubricant balance being critical for excellent performance.
Tin stabilisers are more expensive than Leads, but as they are so efficient, processers
7. with top of the line extruders are reported to have come down to 0.3-0.5 PHR with the
powerful methyl tins and being competitive to lead systems.
There are many suppliers of One pack systems, whose numbers have increased as one
packs are now universally used by the huge PVC Pipes and Profiles sector
Siddhartha Roy
Mr. Siddhartha Roy is a Chemical Engineer from IIT Kharagpur (1968). He has worked with plastics all
throughout his career. He was actively involved in development of PVC markets and applications, especially
Pipes and Fittings. He worked with Shriram Vinyls, PRC (now DCW) and Chemplast, manufacturers of PVC Resin
& Compounds. He has managed a PVC Pipes & Fittings factory in Kuwait and helped Jain Pipes (now Jain
Irrigation) set up their Pipe production facilities.
He headed R&D at VIP Industries, Nasik, and is well versed in the processing of Polyolefins, Styrenics,
Polyamides and PC.
He has been active in IPI activities and has delivered several Endowment lectures. He was recently awarded the
Fellowship by the Governing council of IPI for his contribution to the Plastic Industry.
He is currently a consultant and can be contacted at royplastech@rediffmail.com (Mobile 9890366632)