Curled multilayer films may lead to problems during printing, lamination, thermoforming, etc. Curling occurs mainly in asymmetrical films.
Some tools are shown to reduce this curling effect.
Prejudices about polyamide for multilayer filmsTed Brink
Although polyamide is widely used for the production of multilayer films, still some prejudices are persistent.
This presentation tries to explain the character of these prejudices to end with the conclusion that polyamide is a versatile polymer with good properties for multilayer films.
Functional barrier films in flexible packaging industryHenky Wibawa
Technology and market trends in flexible packaging development. Presented in Asia Flexible Packaging Summit 2016, 13-14 January, 2016 Crowne Plaza Century Park Shanghai
Prejudices about polyamide for multilayer filmsTed Brink
Although polyamide is widely used for the production of multilayer films, still some prejudices are persistent.
This presentation tries to explain the character of these prejudices to end with the conclusion that polyamide is a versatile polymer with good properties for multilayer films.
Functional barrier films in flexible packaging industryHenky Wibawa
Technology and market trends in flexible packaging development. Presented in Asia Flexible Packaging Summit 2016, 13-14 January, 2016 Crowne Plaza Century Park Shanghai
Cosmo Films Leading manufacturer of bopp films in India and across the globe. BOPP film is used in vast range of applications comprising packaging, labeling and lamination.
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
Everything you ever wanted to know about "Packaging" but were afraid who to ask ?
This presentation is a collection of information from various sources and respects the copyright / intellectual property of the original writers and sources.
The presentation covers everything in packaging and can work as a bible for new and old players of the packaging industry.
This is just a fundamental information and does NOT claim to be "Complete" or "Flawless" in itself.
If you liked reading this or benefited from the compilation, I would really appreciate a comment or line of appreciation.
Thanks....
Rohit Chawla.
info@packtest.com
www.PackTest.com
New Eco-Sustainable Polyamide-Based Polymers and Compounds for Multipurpose A...RadiciGroup
New Eco-Sustainable Polyamide-Based Polymers and Compounds for Multipurpose Applications
Nicolangelo Peduto - Marketing and R&D manager - RadiciGroup
Chemicals & Plastics Areas
Green Polymer Chemistry - 2015
18-19 March 2015 – Cologne, Germany
Cosmo Films Leading manufacturer of bopp films in India and across the globe. BOPP film is used in vast range of applications comprising packaging, labeling and lamination.
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
Everything you ever wanted to know about "Packaging" but were afraid who to ask ?
This presentation is a collection of information from various sources and respects the copyright / intellectual property of the original writers and sources.
The presentation covers everything in packaging and can work as a bible for new and old players of the packaging industry.
This is just a fundamental information and does NOT claim to be "Complete" or "Flawless" in itself.
If you liked reading this or benefited from the compilation, I would really appreciate a comment or line of appreciation.
Thanks....
Rohit Chawla.
info@packtest.com
www.PackTest.com
New Eco-Sustainable Polyamide-Based Polymers and Compounds for Multipurpose A...RadiciGroup
New Eco-Sustainable Polyamide-Based Polymers and Compounds for Multipurpose Applications
Nicolangelo Peduto - Marketing and R&D manager - RadiciGroup
Chemicals & Plastics Areas
Green Polymer Chemistry - 2015
18-19 March 2015 – Cologne, Germany
Effect of beam current, weld speed and dissolution on mechnical and microstru...eSAT Journals
Abstract Electron beam welding has proved phenomenal in welding of components used in space because it uses a vacuum environment which eliminates substances like oxygen, nitrogen, and hydrogen. The main advantage of EBW is its ability to weld dissimilar materials and incorporate desirable properties in the assembly. It has high depth to width ratio and focuses exactly on the portion to be welded, thereby reducing the weld area, making it one of the most suitable welding processes. In this study, welding has been done on a circular heterogeneous component using an electron beam welding machine to determine the effect of beam current, speed of weld and dissolution on the bead geometry, hardness at the weld bead and the heat affected zone. This component is made up of AISI 304(Austenitic) and AISI 446 (Ferrite) stainless steel, both of which are widely used in space applications.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
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.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
2. Page 2
Curling in multilayer films
curling in multilayer films
In practice, curling occurs
only in asymmetrical films
3. Page 3
Contents
• pros and cons of asymmetrical films
• causes of curling
- multilayer film
- thick film
• dealing with curling
• conclusions
curling in multilayer films
4. Page 4
Asymmetrical films
• different materials used
- different Tm, Tg, crystallization behaviour
• often used for barrier films
- combinations of polyolefins and polyamide or EVOH
curling in multilayer films
5. Page 5
Advantages of asymmetrical films
• superiour thermoforming
• short sealing cycle
• good sealing
• excellent printing
• improved O2-barrier
curling in multilayer films
6. Page 6
Disadvantage of asymmetrical films: curling
Curled films may cause problems during:
• winding
• slitting
• printing
• lamination
• thermoforming/packaging
curling in multilayer films
7. Page 7
The main cause of curling
• curling may occur in asymmetrical films
• asymmetrical films have different polymers
• different polymers have different crystallization rate
curling in multilayer films
8. Page 8
The main cause of curling – model 2-layer PA/PE
curling in multilayer films
A
layer A and B liquid
B
layer B crystallizes
layer A follows
A
layer A crystallizes
layer B cannot follow
B
A
curling occurs when the film is cooled from the melt
A
B
2-layer model
B
layer polymer Tm Tcc
A PE 125 °C 115 °C
B PA6 220 °C 180 °C
c o o l i n g
9. Page 9
Factors influencing curling
• materials used
- difference in melting point
- difference in crystallization
- difference in shrinkage
- difference in moisture absorption
• processing conditions
- cast or blown film (cooling rate)
- cooling capacity
• film structure
curling in multilayer films
10. Page 10
Polyamide effects
• polyamide interacts with moisture
- high humidity: moisture absorption
- low humidity: moisture desorption
• Tg influenced by H2O
- postcrystallization may occur when Tg drops below ambient
conditions
curling in multilayer films
11. Page 11
Moisture induced crystallization of PA6
curling in multilayer films
Tg PA6
• dry ± 55 °C
• wet ± -10 °C
Effects of moisture on PA6 film:
• lower stiffness
• increased flexibility
• increased stretchability
• easier thermoforming
postcrystallization
occurs when Tg
drops below
ambient
temperature
O=C
N-H
|
O=C
N-H
|
O=C
N-H
|
O=C
N-H
|
O–H
H
H2O
12. Page 12
Remedies against curling
• use of a water bath
• film annealing
• relaxation and/or rewinding
• polyamide blending
curling in multilayer films
13. Page 13
Use of a water bath
• a water bath helps to reduce
curling
• PA absorbs water
- increase of dimensions
- increase of flexibility
- Tg drops, postcrystallization
may occur → decrease of
dimensions
curling in multilayer films
water temperature: 60 – 85 °C
residence time: 5 – 30 sec
14. Page 14
Curl reduction - water bath
0
50
100
150
200
250
1 2 3
curlfactor[m-1]
Reeks1
Reeks2
Reeks3
• residence time in water bath 5 sec
• 3-layer blown film of 100 μm
curling in multilayer films
15. Page 15
Curl reduction - film treatment
• film annealing
- in conditioned warehouse
- at elevated temperature
• film rewinding
- low speed → relaxation
- using heated rolls
curling in multilayer films
16. Page 16
Curl reduction – reduction crystallization rate
• reduce the crystallinity of the PA
- blend PA6 with PA6.66
- replace PA6 with PA6.66
• blend with amorphous polyamide
- PA6 with PA6I/6T
curling in multilayer films
17. Page 17
Curling in thick film
• films are mostly cooled one-sided, resulting in:
- density difference
- morphology difference
curling in multilayer films
film
cooled surface density crystallinity
• resulting in stresses and curling
18. Page 18
Conclusions thick film
To reduce curling in thick film:
• consider 2-sided cooling
- blown film: external cooling + IBC
- cast film → calendaring or extrusion into water bath
curling in multilayer films
19. Page 19
Conclusions asymmetrical films
• curling occurs predominately:
- in asymmetrical multilayer film
- in blown film
- with polyamide in the outer layer
• curling is reduced by:
- fast cooling of the melt
- use of water bath
- polyamide with lower crystallinity or melting point
- blending PA6 with PA6I/6T
- post treatment of film
curling in multilayer films
20. Page 20
More information and contact
Ted Brink
Email: ted.brink@extrusionist.com
Internet: www.extrusionist.com
Tel.: +31 651109899
Skype: ted.brink
curling in multilayer films