Author: Teflon Adhesive Tape

Teflon tape is a chemical resistant, high temperature, has excellent insulation properties, and widely used in packaging thermoplastic, composite, sealing heat, electrical and electronic industries. Do you know how to detect Teflon adhesive tape?

Teflon tape testing laboratory to maintain the ambient temperature at 23 ± 2 ℃, the temperature at 65 ± 5% R.H. Put the Teflon tape sample in the test environment for 24 hours or more, the three layers of each roll of testing tape should be discarded, when cutting the test piece, the adhesive surface can not be touched by hand or other articles. Teflon tape thickness can be marked percentile or thousands based on actual needs, measurement method is the whole volume of adhesive tape opened after the viscose face up, then the thickness of each equal to the measured distance of more than 3 points to take the average.

Measurement Teflon tape width is generally cut 30 cm long test piece, place 20 minutes, and then a number of vernier caliper measurements, take the arithmetic mean. Measuring length is the volume of glass, plastic surface up, placed 1 hour later, with the tape measure about the amount of time to measure the length of the number of joints should also be checked.

Check whether the Teflon high temperature adhesive tape has adhesive residue on the back, you can roll the whole degumming, from the edge of the first 3-5 seconds per meter speed opened. Take the test piece 50mm * 300mm, diameter 1 / 32-1 inches of stainless steel ball, the roller table placed on a flat glass plate, In order to ensure that the absorbent cotton can be wet volatile ethyl acetate tried the surface of the ball table and the ball, needs to adjust the oblique roller table tilt angle of 30 degrees, at this time the test piece is still flat, and then put the tested ball with a pair of tweezers on the top of the pachinko ball utensil, then press the ejector valve, The ball will slide along the inclined table to the test piece, select the size of the ball, and adjust the ball down the different tracks, record the maximum stuck ball number.

Test Teflon tape peel strength, Select the constant speed per minute up to 300mm of the tensile machine, size 120mm * 400mm * 2.35mm 304 or 302 stainless steel, width 45mm, diameter 83mm, weight 2000 ± 50g metal roller, while wrapped in 6mm thick, hardness 80 ± 5 of the vulcanized rubber. First with absorbent cotton impregnated with ethyl acetate will wipe clean steel plate, placed 5 minutes, until the surface is completely dry, and then pull the plastic cut width 25mm, length 250mm of the test piece, and then gently fit the center of the steel, and then with 2KG roller pressure on the steel plate back and forth pressure on the test piece one time, the pressure of the speed is 300mm / min, if not produce bubbles is well, rolling after the protrusion of the steel plate to pull the film or pull back to 180 degrees to pull back to the folder in another chuck, when the rally machine starts to record, take the memory of the median of the three pieces of the arithmetic mean , For ease of operation, Teflon tape can be attached to the other side with 0.02-0.03mmOPP or polyester film.
　
Test the holding force of Teflon tape, select the CN-4851 pressure-sensitive adhesive tape holding viscosity tester, 25mm * (25mm + 45mm) 302 or 304 stainless steel sheet, 45mm wide, 83mm diameter, weight 2000 ± 50g metal roller. The test plate and the loading plate were first wiped with absorbent cotton impregnated with ethyl acetate, and the test piece was pasted in the middle of the test plate and the loading plate in parallel to the longitudinal direction of the plate. Rolls were rolled on the test piece at a linear speed of 300mm/min pressure three times. After the test piece is stuck, place it for 20 minutes. The test temperature will depend on the tape, usually 23 ± 2 ℃, 40 ± 2 ℃. Then the anti-test plate is fixed to the test rack vertically, and the loading plate and the weight of 1kg are connected by a pin. Then start to record the test start time, until the test piece from the steel slide position, and then take the test time average of three times.

Teflon adhesive tape surface is smooth, has a good anti-adhesive, chemical resistance, high temperature resistance and excellent insulation properties. Teflon tape is widely used in packaging, Teflon tape thermoplastic, composite, sealing heat, electrical and electronic industries, anti-corrosion heat-resistant insulation and other parts of paste, and has repeatedly paste function. Teflon tape, which is reinforced by fabric, is used in the roller of the sizing machine, thermoplastic stripping and other industries. It can be used repeatedly and is easy to replace. Teflon tape can be directly stick to a variety of large surface and the rules of the surface (such as roller), and the operation is very simple. Exempted from spraying PTFE materials to be professional equipment, special processes and must be transported to a professional spray processing plant restrictions.

The normal roll width of Teflon adhesive tape is 1 meter, and roll length is 50 meters. There are three colors for Teflon tape, Brown, White and Black. At the same time can be cut into a variety of width, and in accordance with customer requirements to produce different thickness Teflon adhesive tapes. Teflon film tape is made of high performance PTFE film, after special treatment on the high temperature silicone. The maximum width is 1000 mm, the color is white or gray.

The main features of PTFE Teflon tape
1. Temperature resistance from -196 ℃ to 300 ℃, with weather resistance, anti-aging. Through the practical application, such as in 250 ℃ high temperature conditions placed consecutively 200 days, not only strength will not become low, and also don’t reduce weight, In 350 ℃ high temperature for 120 hours, the weight only decreased about 0.6%, at -180 ℃ ultra-low temperature and can maintain the original flexibility.

2. Non-adhesive: smooth surface, not easy to adhere to any substance. Easy to clean the surface attached to a variety of oil stains, stains or other attachments; paste, resin, paint, etc. almost all of the adhesive material can be simply removed.

3. Resistant to chemical corrosion, resistant to strong acid, alkali, aqua regia and a variety of organic solvents corrosion.

4.  Chemical resistance, non-toxic. Almost resistant to all pharmaceutical items.

5. With high insulation properties (dielectric constant: 2.6, tangent less than 0.0025), anti-ultraviolet, anti-static.

6. Fire retardant

7. Easy to use, long service life.

If you want get to know more information about Teflon adhesive tape, please feel free to contact us system@corefrp.com. We will reply you soon. Thank you!

Polytetrafluoroethylene (TEFLON) is a kind of excellent solid lubricating materials, it has a low friction coefficient and good chemical stability and thermal stability, but the wear resistance of TEFLON was poor. At present, people have used different kinds of packing to filling modification of PT FE, and the friction and wear properties of TEFLON composites are a lot of research, but the quenching effect on tribology properties and the mechanical properties of TEFLON composites research has yet to see detailed report. This paper uses the polyimide, polystyrene grease, CdO, Cu powder, glass fiber and carbon fiber, etc. Filling modification of TEFLON, using M M – 200 wear testing machine of TEFLON composites under the condition of dry friction the friction and wear properties are studied, and probes into the impact of quenching process of TEFLON composites tribological properties and the mechanical properties.

Experimental section
To Cu, Pb, CdO powder, graphite (Gr), glass fiber (GF) and carbon fiber (CF), polyimide (PI) and polystyrene resin (Ekonol) (particle size is less than 76 microns) at a certain volume is added to the TEFLON powder (size 39 microns), after mixing cold pressing molding, then free sintering in air, some of these samples quenching process. Sample size is 30 mm *7 mm*6 mm, dual for 45 # steel ring diameter of 40 mm, samples and 45 # steel ring surface are made of 900 # water sand paper polishing burnish.At room temperature, the dry friction condition, use M M – 200 type abrasion tester on friction and wear properties of TEFLON composites is evaluated. Before each test, the sample and dual surface with acetone tampons scrub clean, and dry in the air. This experiment chooses the load is 200 N, at the rate of 0. 42 m/s, the friction and wear test time is 120 min. Wear in grinding crack width gauge on the surface of the sample after test. By measuring the friction moment, and then calculate the coefficient of friction, the friction coefficient within 60 min after taking average. Hardness test carry out on burawoy microhardness meter. Tensile properties in tension test machine for L J500 type, sample size according to the provisions of the GB/T 1040-92 with type I sample.

The results and discussion
Tab.1 shows the friction and wear properties of TEFLON composites and mechanical properties of the test results. We can see that almost all packing can reduce the wear and tear of the TEFLON composite material, greatly improve the TEFLON abrasion resistance of the composite material.At the same time, the addition of filler were improved in different degree hardness of TEFLON composites, but decreased the tensile strength of the TEFLON composite materials (except for # 5 samples) and elongation. In this experiment chooses packing, polystyrene resin has a good damping effect, so that the eps grease filling of the two kinds of TEFLON composites (# 2 and # 3 samples) has good abrasion resistance, but the two PT FE composite materials tensile strength is small. Whereas cdos reduces the friction coefficient of TEFLON composites, which makes the CdO filling two kinds of TEFLON composites (7 # and 8 #) sample has good friction performance, but the two poor wear resistance of TEFLON composites. Carbon fibers and graphite filled TEFLON composite material friction and wear properties of the samples (# 13), though poor, but the tensile strength and elongation are larger. And Cu powder and carbon fiber filled PT FE composite samples (5 #) composite friction, abrasion and mechanical performance is good. In Fig. 1 and Fig. 4 shows the amount of PI to PT FE friction coefficient of the composite material, grinding crack width, the influence of the elongation and tensile strength. From Fig. 1, you can see that PI filling increases the PT FE composite material, the friction coefficient and friction coefficient of TEFLON composites basically as the PI content increases. Fig. 2 the results showed that the PI fill greatly reduces the PT FE composite wear; But in this test, within the limits of PI amount as the PI content increasing, the increase of the content of PI has a little influence on wear resistance of TEFLON composites. Fig. 3 the results showed that the PI filling percentage elongation of TEFLON composites basically decrease with the increase of content of PI. Fig. 4 shows that the result of the PI, the tensile strength of the filled TEFLON composites with PI decreased with the increase of adding amount of first, then with the PI amount increases with increasing (30% ~ 60%).

Fig. 5 and Fig. 6 show the friction coefficient and wear scar width of polystyrene fat filled TEFLON composites (2# samples) changes in load curves, respectively. It can be seen that polystyrene resin filled TEFLON composites (2# sample) the wear scar width increases as the load increases, the friction coefficient decreases with the increasing load.

Tab. 2 show the pure TEFLON under two different conditions that free cooling and hardening of tensile strength and elongation of the test results. It can be seen that quench has little influence on tensile strength of TEFLON, but increase the elongation of TEFLON and TEFLON the crystallinity of the sample. Therefore, the crystallinity of TEFLON material size had little effect on the tensile strength, elongation increases with lower crystallinity.


Fig. 7 to Fig. 9 respectively gives the quenching treatment on PT FE friction coefficient of the composite material, the influence of grinding crack width and hardness. Fig. 7 results show that quenching treatment make TEFLON + 30 (v) % PI the friction coefficient of the composite increased obviously, but for several other PT FE has little influence on friction coefficient of the composite material. Fig. 8 results show that, with the exception of polyphenyl grease filling PT FE composite samples (2 #), quenching the wear and tear in the other kinds of TEFLON composites increase, lower wear resistance. And Fig. 9 shows that the result of the quenching process are in different degree, reduce the PT FE hardness of the composite material.

Comprehensive Tab. 2 and Fig. 7 ~ Fig. 9, you can see that the result of the quenching process to lower crystallinity of TEFLON composites, which leads to its hardness decreases, and increase the elongation and abrasion (polyphenylene grease filling PT except FE abrasion resistance of the composite material).Quenching the PT FE + 30 (v) % PI the friction coefficient of the composite increased obviously, but for several other PT FE has little influence on friction coefficient of the composite material. Therefore, quenching treatment does not favor the comprehensive performance of TEFLON composites to improve.

If you want get to know more information about Teflon adhesive tape, please feel free to contact us system@corefrp.com. We will reply you soon. Thank you!