Month: November 2018

Application of PTFE (Teflon) high temperature cloth (PTFE high temperature cloth as release cloth)

PTFE (Teflon) high temperature cloth is a high-performance, multi-purpose composite material new product which is made of polytetrafluoroethylene emulsion and impregnated with high-performance glass fiber cloth.

Application of PTFE (Teflon) high temperature cloth

PTFE (Teflon) high temperature cloth is commonly known as release cloth in the demoulding industry, and its characteristics of high anti-sticking, high temperature resistance, low friction and anti-corrosion. The release cloth has the following advantages:

1. The mold release is complete, the product qualification rate is highly improved, the scrap rate is greatly reduced, and the cost is saved.

2.The surface is uniform, flat, high gloss, so that the appearance of the mold is very grade.

3. No environmental pollution, saving cost, avoiding the rubber vulcanization and bonding.

4. No rubber particles remain on the surface of the mold, so cleaning process is not required, thus shortening the demolding process, improving production efficiency, reducing losses, and reducing production costs.

5. Durable (5,000 times).

The main thickness: 0.11mm、0.13mm、0.18mm.

The main color: brown, white and black.

Main performance characteristics:

1.Temperature resistance: up to 260℃. After 200 days at 250℃, the strength and weight of the belt are kept the same

2.Non stick: not easy to stick any substance. It is easy to clean, all adhesive substances such as paste, resin, paint, etc. can be easily removed.

3. Chemically resistance: resistant to strong acids, alkalis, aqua regia and various organic solvents.

4.Low friction coefficient (0.05-0.1).

5.The light transmittance is 6-13%.

6.With high insulation properties, the dielectric constant is 2.6

7.Good dimensional stability (extension coefficient less than 5‰) and high strength.

8. Non-toxic.

9.Fire retardant.

What is the special use of Teflon high temperature cloth as breathable cloth?

tom of the pan is a non-stick pan, coated on the equipment is the anti-fouling surface, coated on the cloth is oil-proof, dust-proof cloth.
In addition to being waterproof, breathable, dirt-resistant and anti-aging, PTFE (Teflon) fabrics have the advantages of low shrinkage, corrosion resistance.

What is the special use of Teflon high temperature cloth as breathable cloth?

PTFE (Teflon) breathable cloth is made of high quality glass fiber, which is weaved into high-grade fiberglass cloth. The PTFE (Teflon) high temperature resistant varnish of various thicknesses is produced by using unique process technology, fully immersing, dipping and coating PTFE resin. The thickness of the breathable cloth is generally 0.21 mm, 0.28 mm, 0.105 mm, 0.07 mm, and 1.05 mm. The normal width is 1 meter, and the special width can be customized.

Breathable cloth is one of the PTFE (Teflon) high-temperature cloth, we have developed a new type of breathable cloth, which has smooth surface, good integrity and uniform air permeability.

Teflon breathable cloth is mainly used for pneumatic conveying chutes of cement, alumina and other powder materials. It is also suitable for pneumatic conveying devices of other powder and granular materials, such as trains and automobile bulk powder tankers. The pneumatic conveying device has been widely used in metallurgy, building materials, chemical industry, power plant, food and transportation industry, and have achieved good results, and instead of the traditional belt conveying and screw conveying. Since the material is in a gasification state during transportation, it has good fluidity, the equipment is not damaged by friction, and the maintenance amount of the equipment is reduced. The material is transported in a closed chute, there is no flying loss, the environment is not polluted.

How to Judge the Quality of Teflon Mesh Belt?

How to Judge the Quality of Teflon Mesh Belt?
How to judge the quality of Teflon mesh belt from the senses?

How to Judge the Quality of Teflon Mesh Belt?23

There are many kinds of Teflon mesh belt in the market, but the qualities are mixed, since the differences between different fiberglass meshes the factories used, production technologies and market concepts.

We can visually identify the amount of impregnated Teflon emulsion from the degree of surface smoothness. If no gloss shows, this mesh belt uses less emulsion in order to save costs. On the one hand, the amount of emulsion affects the price. On the other hand it affects the service life of the mesh belt.

From the sense of touch, you can hold the sample and fold it at a 30-degree angle. If there is obvious crease after folding 3-5 times, it means that the curvature of mesh belt is not enough. The length of Teflon meshes is generally dozens of meters. If the sample breaks for a little bit folds, it must not be used on the machine. Conversely, if you fold more than 5 times and it maintains the original hardness and curvature, this mesh belt is qualified.

This material is commonly known as Teflon. And its formal name is polytetrafluoroethylene (abbreviated as Teflon, PTFE，and F4), that also known as the “Plastic King”. It is polymerized by tetrafluoroethylene, and its structural formulas is -[-CF2-CF2-]n-.

High Temperature Resistance——its operating temperature up to 250℃, and can be used long-term in 200~260℃.
Low Temperature Resistance——it has good mechanical toughness, which can maintain a 5% elongation even if the temperature drops to 196℃ ,and it is still soft at-100℃.
Corrosion Resistance——it shows inert to most chemicals and solvents, and can resist strong acid, alkali, aqua regia and a variety of organic solvents.
Climate Resistance——it has the best aging life in plastics.
High Lubrication——it has the lowest friction coefficient (0.04) in solid materials, which is smoother than ice.
Non-adhesion——it has the smallest surface tension in a solid material and does not adhere to any substance.
Non-toxic——With physiological inertia, it can used as artificial blood vessels and organs and implanted in body long-term without adverse reactions.
Aging resistance——it has irradiation resistance and low permeability, so it can maintain the surface and performance even if it has exposed to the atmosphere long-term.
Non-flammability——its limited oxygen index is below 90.
Acid and Alkali resistance——it is insoluble in strong acid, strong alkali and organic solvents (including magic acid, i.e. fluorine antimony sulfonic acid).
Antioxidant resistance——it can be resistant to strong oxidizing agents.
Insulation——it has excellent electrical properties, which is the ideal C-class insulation material. For example, the Teflon that is as thick as the newspaper can block 1500V high pressure. Its electrical insulation is not affected by temperature. The dielectric constant and dielectric loss are very low in the wide frequency range, and the breakdown voltage, volume resistivity and arc resistance are relatively high.
Acid-alkaline-it is neutral.

How to classify Teflon tape according to the degree of high temperature resistance?

Specifically, if the working environment is just up to about 100℃ and the company does not pay much attention to the quality and service life to Teflon tape, the choice of Teflon tape that temperature resistance reaches 260℃ is a waste.

How to classify Teflon tape according to the degree of high temperature resistance?

If the working environment requires that its temperature resistance is up to 180-260℃, then you must choose the 260℃ Teflon tape.

Therefore, domestic customers are generally divided into above two types except the customers who uses imported rape. Most customers, especially end-use customers, will choose the 260℃ Teflon tape taking into account the degree of temperature resistance and service life, so this kind Teflon tape is more popular in the market.

Teflon coating is a unique high-performance coating that combines heat resistance, chemical inertia, excellent insulation stability and low friction, which has the combined advantages that other coatings cannot compete with, and the flexibility it applies allows it to be used in almost all shapes and sizes of products.

Teflon is divided into several basic types as PTFE, FEP, PFA, ETFE.

1, Teflon PTFE: non-stick PTFE (polytetrafluoroethylene) coating can be used continuously in 260 ℃, with a 290-300 ℃maximum temperature, very low friction coefficient, good wear resistance and chemical stability.

2, Teflon FEP: non-stick FEP (ethylene fluoride propylene copolymer) coating melts and forms porous film in baking. It has excellent chemical stability and non-stick characteristics, and the maximum operating temperature is 200℃.

3, Teflon PFA: non-stick PFA (over fluorine alkylation) coating melts and forms porous film in baking. The advantage of PFA is that it has a higher continuous temperature ( 260℃) and stronger toughness, which especially suitable for the high temperature conditions of anti-adhesion and chemical resistance.

4, The Teflon ETFE: ETFE is a copolymer of ethylene and tetrafluoroethylene. That is the toughest fluorine polymer that can form a highly durable coating with excellent chemical resistance, and it can continuous operate at 150 ℃.

After Teflon coating, it has the following characteristics:
1 Non-adhesion: almost all substances are not bonded with Teflon coating even if the coating is very thin membrane.
2 Heat Resistance: Teflon coating has excellent high and low temperature resistance characteristics. It can withstand high temperature to 300 ℃ in short time. And it can be used continuously between 240℃~260℃ with significant thermal stability. What’s more, it will not embrittle at freezing temperature, and will not melt in the high temperature.
3 Sliding: Teflon coating has a low friction coefficient. The friction coefficient changes when the load is sliding, and the coefficient is 0.05-0.15.
4 Moisture Resistance: Teflon coating surface does can keep free from water, oil and solution when operating. If it is sticky a small amount of dirt, simple wipe can removed it. Short downtime can save working hours and increases productivity.
5 Wear Resistance: Teflon coating has excellent wear resistance under high load. And, it has the dual advantages of wear resistance and non-adhesion under a certain load.
6 Corrosion Resistance: Teflon is almost immune from drug erosion, so that it can protect parts from any kind of chemical corrosion.

How to test the viscosity of Teflon tape?

Because there are many suppliers in current market, Teflon tape’s quality is uneven. Most of customers pay attention to its sticky. For example, customers’ will is to use their own hands to test stickiness once getting a roll of tape. In fact, they certainly cannot test for the moisture, booty on their hands. We use steel to do the test in Teflon production, and the surface of the steel need to be very clean, which is a more formal test method. But many customers cannot do such test for the conditions limits. The best way should be glue itself with the face of adhesion, and then pull open. The greater the intensity of the pull, the greater the viscosity.

How to test the viscosity of Teflon tape?

Teflon tape has many characteristics like anti-adhesion, high temperature resistance, corrosion resistance and so on, so it is widely used in various industries. Teflon tape has a wide variety, different colors, and different price according to different quality. Today, our Taixing, Yong Sheng fluorine Plastic Products Co., Ltd. specializes in the production of Teflon tape. At present, the thickness of Teflon tape is 0.13mm-0.3mm. Their color has coffee, blue, black, and white. And the black is divided into anti-static and non-antistatic. The price is RMB 40 yuan to 60 yuan. Our products are very popular since the listing.

Let us talk about that how long should the Teflon tape to be used, that the problem has been bothering a lot of customers. After testing and technical discussion, we found that the good-quality tape almost will not happen residual glue degumming in half a year. And the slightly low-quality tape that adhesive is not pure will have residual glue when using after half a year. Even in the moment of ripping off, glue has been falling off.

Some customers would like to order the amount of one year at a time. In fact, it is not beneficial for the usage and storage of tape. Tape will evaporate slowly in contact with the air. So the performance of the tape will reduce with the placement time. In order to make full use of Teflon tape, good-quality Teflon tape should be used in half a year, and the slightly low-quality tape should be used as soon as possible.

Please replace Teflon tape from Taizhou Co., Ltd. after a period of time, so as not to affect the quality of production.

Application of Teflon High Temperature Welding Cloth in Door and Window Welding

Teflon high temperature welding cloth, scientific name is PTFE coated glass fiber cloth, also known as Teflon high temperature varnished cloth, use suspended PTFE (commonly known as plastic king) emulsion as raw material, and impregnated high-performance fiberglass cloth. It is a new composite product with high performance and multi-purpose composites. Because of its excellent performance, it is widely used in many fields, like aviation, paper, food, environmental protection, printing and dyeing, clothing, chemicals, glass, medicine, electronics, insulation, construction (shed top film structure base cloth), grinding wheel slices, machinery and so on.

Application of Teflon High Temperature Welding Cloth in Door and Window Welding

Teflon high temperature welding cloth, also known as self-adhesive welding cloth, welding protective cloth, plastic-steel welding cloth, is high-strength fiberglass cloth used in plastic doors and windows welding for cladding, isolation of the heating plate. It is a new composite material that uses high-strength fiberglass cloth as the base cloth, and coat Teflon (PTFE) after multiple impregnations.

As a consumable accessories on the welding machine of plastic steel door and window, Teflon high temperature welding cloth can maintain its own ductility and doesn’t easy to shrink in high-temperature for its own high-temperature resistance characteristics. The residue in the welding process will rarely remain on the surface for its smooth surface and low friction coefficient.

How to choose Teflon high temperature welding cloth?

Low surface finish or unevenness will lead to reduction of work efficiency, because you need to clear the residue before welding.

High-quality self-adhesive welding cloth has many advantages, such as uniform thermal conductivity, high strength, good temperature resistance, good anti-adhesion effect, and small thermal expansion coefficient.

Main performance characteristics of Teflon high temperature welding fabric

1 High temperature cloth can use in the environment that temperature is between -196 ℃ and 300 ℃,and it has the advantage of weather resistance and anti-aging. After practical application, not only its strength have not been lower, but also its weight have not reduced when the cloth has been placed for 200 days at 250 ℃; its weight only have reduced by about 0.6% when it has been placed for 120 hours at 350 ℃; -180℃ ultra-low temperature will not produce cracks, and maintain the original softness.
2 Non-adhesion: It is not easy to adhere to any substance. Easy to clean a variety of oil stains, stains or other attachments attached to its surface, paste, resin, paint and so on almost all sticky substances can be simply removed.
3 It is resistant to chemical corrosion, strong acid, strong alkali, aqua regia and various organic solvents corrosion.
4 Low friction coefficient (0.05-0.1), so it is the best choice for oil free self-lubricating.
5 Light transmittance reached 6~13%.
7 It has high insulation performance (dielectric constant small: 2.6, tangent: under 0.0025), and it is anti-ultraviolet, anti-static.
8 It is drug-resistant, non-toxic, and almost can resistant to all pharmaceutical products.
9 It is fireproof and flame retardant.