How to store Teflon adhesive tape

Teflon adhesive tape is smooth, has good anti-sticking, chemical resistance, high temperature and high insulation, it is widely used in packaging, thermoplastic, composite, sealing heat and electrical and electronic industry. However, it is often appear this kind of circumstance during use: Teflon adhesive tape can not be used after bought back and store for few months. The problem is mainly due to storage and protection. So what do you need to pay attention to in storage and protection?

Storage Teflon adhesive tape should be packaged in a good package, and then sealed with plastic film, Seal is to avoid the sun, rain, and also to prevent contact with chemical corrosion solvents, but also should keep the warehouse dry and fire. Same type and thickness of Teflon adhesive tape should be placed together, and indicate the storage time with the label. If you want to store unspent Teflon adhesive tape, the tape should not only with plastic film packaging, but also with the label indicate the use of time and storage time. When using tape, be sure to follow the storage time to use. In the tape storage time, we need to regularly open the tape packaging, check the tape color and viscosity,If finding problems, one should timely handle with.

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How to detect PTFE 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.

Do not use exceed the shelf life of the PTFE Teflon adhesive tape

Teflon adhesive tape with a shelf life, the viscosity and strength of the Teflon tape exceed the shelf life is poor than the tape in shelf life.

The composition of Teflon adhesive tape: Inside is glass fiber cloth, and then coated with Teflon, and finally stick glue on the Teflon cloth, adhesive composition is the high-temperature silicone.
The problem of Teflon adhesive tape is affected by the sticky after shelf life: Over time, the viscosity of high-temperature silicone in Teflon tape will decline due to time, Based on the results of the aging test, we recommend that manufacturers with high viscosity requirements should use the Teflon tapes within 1 year after purchase. 3 to 5 months of viscosity can be guaranteed, then the viscosity will slowly decline, more than one year after the viscosity will be greatly reduced.

Another component of Teflon adhesive tape is Teflon coated fiber glass cloth. Because of long-term contact with air, so Teflon cloth by the corrosion of air and gradually be oxidized, thus affecting the strength. Originally high strength Teflon tape, because a long time in contact with air, it can easily be torn off when tearing. Therefore, we suggest customers do not to buy too may Teflon tapes, generally not more than 6 months dosage.

Teflon tape is a consumable, after used a period of time should be replaced in a timely manner to avoid has an impact on production because of environmental impact, do not to use the almost over the shelf life tapes.