PTFE Overview
Polytetrafluoroethylene (PTFE), commonly known as Teflon, is a fluoropolymer made of tetrafluoroethylene (TFE) monomer. It is widely used compound in our life
The PTFE Origin Story
In 1938, Roy Plunkett, discovered PTFE when trying to create a new chlorofluorocarbon refrigerant
He stored the TFE gas in metal cans and he used the weight of the cans to measure the amount of TFE used
although the weight of the gas pressure bottle didn’t signal that it was empty, no gas flowed out of it . he decided to cut the metal can apart. he found a white and flaky powder on the interior of the can . The TFE had polymerized overnight with the iron from the inside of the can acting as a catalyst.
Melamine resin or melamine formaldehyde is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. The presentation includes the preparation of MF, its properties and applications.
Miscibility and Thermodynamics of Polymer BlendsAbhinand Krishna
Presentation includes classification of polymer blends based on miscibility, phase diagram of polymer blends and thermodynamics polymer blends which includes Gibbs energy theory and Flory-Huggins Theory
The popular name of Polytetrafluoroethylene (PTFE) is Teflon. Technically, it is a fluoropolymer made of tetrafluoroethylene or TFE. PTFE coated fibreglass fabric manufacturers in India makes a variety of products that are used in several industries.
The main characteristic of PTFE is that it is hydrophobic. It means it does not get wet by water or any other substance that contains water. It is highly non-reactive and has the lowest friction rate. The coating is one of the most favored in producing non-stick material.
It has excellent release capabilities of withstanding high temperatures (typically, it is more than 500 degrees F). It is the reason; PTFE is used for making Fiberglass cloth. It is used in various applications across industries.
Melamine resin or melamine formaldehyde is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. The presentation includes the preparation of MF, its properties and applications.
Miscibility and Thermodynamics of Polymer BlendsAbhinand Krishna
Presentation includes classification of polymer blends based on miscibility, phase diagram of polymer blends and thermodynamics polymer blends which includes Gibbs energy theory and Flory-Huggins Theory
The popular name of Polytetrafluoroethylene (PTFE) is Teflon. Technically, it is a fluoropolymer made of tetrafluoroethylene or TFE. PTFE coated fibreglass fabric manufacturers in India makes a variety of products that are used in several industries.
The main characteristic of PTFE is that it is hydrophobic. It means it does not get wet by water or any other substance that contains water. It is highly non-reactive and has the lowest friction rate. The coating is one of the most favored in producing non-stick material.
It has excellent release capabilities of withstanding high temperatures (typically, it is more than 500 degrees F). It is the reason; PTFE is used for making Fiberglass cloth. It is used in various applications across industries.
Start Investing in Plastic & Polymer Industries. Start Business of Poly Tetra...Ajjay Kumar Gupta
Start Investing in Plastic & Polymer Industries. Start Business of Poly Tetra Fluoro Ethylene (PTFE).
Tetrafluoroethylene polymer, PTFE, and Teflon are all names for polytetrafluoroethylene. It is a tetrafluoroethylene synthetic fluoropolymer with numerous applications. Teflon is a brand name for PTFE-based formulations developed by Chemours, a subsidiary of DuPont, which discovered the compound. Since it is a high molecular weight compound made entirely of carbon and fluorine, PTFE is classified as a fluorocarbon solid.
For More Details: https://niir.org/profile-project-reports/profiles/plastics-polymers-resins-polypropylene-pp-polystyrene-ps-acrylonitrile-butadiene-styrene-abs-polyethylene-terephthalate-pet-polyester-pa-poly-vinyl-chloride-pvc-polyurethanes-pu-polycarbonate-pc-polyethylene-pe-projects/z,,38,0,a/index.html
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This slide describes about Poly tetra fluro ethylene or commonly known as teflon as a biometarial. mostly useful for undergraduate Biomedical Students or students of material Science.
Made by Babin Khanal, College of biomedical engineering and applied sciences Kathmandu Nepal.
this an PPT of IDP project for Engineering college. In this report 2 industrial problem are discussed with solution to the problem. It's Title is Effective selection of Material.
This presentation provides a product overview of AGC's filled PTFE compounds and melt processable compounds. Includes forms, requirements, impacts, markets, applications and more.
Final project report on grocery store management system..pdfKamal Acharya
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This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
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A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Student information management system project report ii.pdfKamal Acharya
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
The Internet of Things (IoT) is a revolutionary concept that connects everyday objects and devices to the internet, enabling them to communicate, collect, and exchange data. Imagine a world where your refrigerator notifies you when you’re running low on groceries, or streetlights adjust their brightness based on traffic patterns – that’s the power of IoT. In essence, IoT transforms ordinary objects into smart, interconnected devices, creating a network of endless possibilities.
Here is a blog on the role of electrical and electronics engineers in IOT. Let's dig in!!!!
For more such content visit: https://nttftrg.com/
2. PTFE Overview
Polytetrafluoroethylene (PTFE), commonly known as Teflon, is a
fluoropolymer made of tetrafluoroethylene (TFE) monomer. It is
widely used compound in our life
The PTFE Origin Story
In 1938, Roy Plunkett, discovered PTFE when trying to create a new
chlorofluorocarbon refrigerant
He stored the TFE gas in metal cans and he used the weight of the
cans to measure the amount of TFE used
although the weight of the gas pressure bottle didn’t signal that it was
empty, no gas flowed out of it . he decided to cut the metal can apart.
he found a white and flaky powder on the interior of the can . The TFE
had polymerized overnight with the iron from the inside of the can
acting as a catalyst.
3.
4. PTFE market
52
%
Asia
pacific
Rest of the
world
Market size is
expected to grow
faster next decade
6.5 %
2030
$5.1
Billion
$3.4
Billion
2022
projected to reach a revised
size of US$5.1 Billion by
2030
2022-2030
5. Preparation of monomer
1.Chloroform
(trichloomethane)
by reacting methane with a
mixture of hydrogen chloride and
chlorine.
CH4(g) + 3Cl2(g) –> CHCl3(g) + 3HCl(g)
2.chlorodifluoromethane
By reacting chloroform with
anhydrous hydrogen fluoride,
chlorodifluoromethane is created.
CHCl3(g) + 2HF(g) –> CHCIF2(g) + 2HCl(g)
3. tetrafluoroethylene
TFE
BY Heating
chlorodifluoromethane in
the absence of air, a
process known as pyrolysis
2CHClF2(g) –> C2F4(g) + 2HCl(g)
03
01 02
6.
7. Process safety constructions for preparation
of monomer
1. TFE is highly flammable, and its transportation is
very risky. Therefore, this step must be performed
on-site where the final product (PTFE) is created
TFE must be cooled rapidly to avoid reverse
reaction and explosive decomposition.
TFE is highly explosive, it is produced on-
site, when and where the polymerization will
occur, minimizing storage time.
Purification of TFE : Pure monomer is required for
polymerization. The gas is first scrubbed to remove any
hydrochloric acid and then distilled to separate other
impurities
9. PTFE is prepared by Radical Polymerization of TFE
Consists of three steps
1] Initiation step:
*it is Used proxy disulfuric acid (reagent) which will be decompose homologically by heating into two free
radicals.
*These radicals used as a radical initiator in the polymerization process.
10. *The radical open the double bond of TFE and create a new radical.
*This new radical open another TFE monomer and create a new monomer
and so on.
11. 2] Propagation Step:
*This process continues making the actual polymer PTFE.
*at this step the polymer chain was created.
12. Termination Step:
At this step the last radical in a polymer chain connected with the
last radical in another polymer chain to produce the PTFE.
13. Polymerization of TFE
two well-known main methods of producing PTFE:
1 suspension polymerization
creates grains of PTFE that can be
processed into pellets which can be
molded
2 dispersion polymerization
produces PTFE in the form of a
milky paste that can be
processed into a fine powder.
useful for coatings
• The reaction chamber is filled with purified
water and a reaction agent or initiator,
terminator
• The liquid TFE is piped into the reaction
chamber. As the TFE meets the initiator, it
begins to polymerize. The resulting PTFE
forms solid grains that float to the surface
heat, produced so the chamber is cooled by the
circulation of cold water or another coolant in a
jacket
PROCESS
DESCRIBTION
PROCESS
DESCRIBTION
• TFE is introduced into a water-
filled reactor along with the
initiating chemical.
• chamber is only agitated gently.
• The PTFE forms into tiny beads.
Some of the water is removed, by
filtering or by adding chemicals
which cause the PTFE beads to
settle.
industrially
15. Unlike thermoplastics the viscosity of the gel above the melting point is too high for
PTFE to be processed by traditional methods such as injection or transfer and
rotational moulding.
1.Compression of the powder at ambient temperature
2. Sintering تلبيد 3. Slow Cooling
steps:
Processing
Cold Compression Moulding
Products :
PTFE short length Rods, & Plates
Advantage:
PTFE Products
manufactured by this
process have good
physical properties
Disadvantage:
PTFE Products of long,
continuous length more than
500mm & complex design
are difficult to produce due
to limited PTFE Resin flow
properties
16. PTFE Tube Extrusion Machine
Advantage
PTFE products
manufactured by this
process are available in
long continuously length
up to more than 3
meters.
Disadvantage
The physical properties such
as Density, Tensile Strength,
Compression Strength are at
minimum level due to low
compression
Product
The PTFE products of basic shapes such as Rods up to
150mm Diameter
Tubes are manufactured up to 3 Meters .
PTFE is continuously fed into one end of straight die
tube
18. The exceptional physical and
chemical properties of PTFE.
Polytetrafluoroethylene is a
tetrafluoroethylene polymer
with a particular molecular
structure that gives it the
unique physical and chemical
properties that distinguish it
from other plastic materials,
making it suitable for endless
industrial applications
PTFE PROPERTIES
19. Comparison 01
• Excellent dielectric strength
at various temperatures and
frequencies
• High surface resistivity
• High volume resistivity
• High dissipation factor
electrical properties
• Chemical inertia: PTFE is inert to almost all known
chemicals (except for elemental alkaline metals and
fluorine)
• PTFE is insoluble at temperatures up to 300°C
• Biologically safe and suitable for use in contact with food
(FDA certification); maximum safety for use in various
applications (the chemical and medical industry and
medical applications)
• Excellent resistance to UV radiation
• Non-flammable
• Completely water repellent
chemical & physical properties
20. • Non-stick and anti-
adhesive
• Low friction coefficient,
even under heavy loads
• Wide range of operating
temperatures
• Excellent workability
• Low heat conductivity
• Good thermal
insulation
thermal properties
mechanical properties
Comparison 02
22. Young's modulus 575 MPa
Shear modulus 230 MPa
Tensile strength 30.5 MPa
Elongation 450 %
Compressive
strength
23.5 MPa
Bending strength 5.5 MPa
Hardness 54 Rockwell
Impact strength 1.6 J/cm
Yield strength 0 MPa
Thermal
expansion
80 E-6/K
Thermal
conductivity
0.24 W/m*K
Specific heat 1000 J/kg*K
Melting
temperature
327 °C
Glass
temperature
127 °C
Minimum service
temperature
-200 °C
Maximum service
temperature
260 °C
Density 2175 kg/m3
Resistivity 1E+22 Ohm*mm2/m
Breakdown
potential
65 kV/mm
Dielectric loss
factor
0.00035
Friction
coefficient
0.075
Refraction index 1.35
Shrinkage 4.75 %
Water absorption 0 %
(PTFE) film was pulled apart using tensile
substage and the tearing process
Testing of Hard PTFE sample on
TensileBOT
24. applications in oil and gas industry
Enhancing Equipment Performance and
Lowering Operation Costs
Teflon is the go-to solution for many production and manufacturing issues due to
their low coefficient of friction, chemical inertness, dielectric stability, and extreme temperature tolerance.
1
handle:
• Release
• Heavy wear and abrasion
• Extreme temperatures
• High loads
• Corrosion
Cabling for Oil and Gas
2
Deep well exploration and drilling operations
resistance in temperatures up to 288 °C (550
°F)—making them ideal for insulation and
jacketing, corrosion resistance, and more.
Learn more.
Heat Exchangers
3
coating or lining for pipes and tubes can
maximize well productivity and minimize
costs