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Manufacturing method of polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape

A technology of polytetrafluoroethylene and silicon pressure-sensitive tape, which is applied in the direction of pressure-sensitive film/sheet, adhesive, film/sheet-shaped adhesive, etc. It can solve problems such as non-compliance with environmental protection requirements, darkening of PTFE surface, pollution, etc.

Active Publication Date: 2021-05-18
嘉兴高正新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium naphthalene treatment is mainly through the reaction of corrosive liquid and PTFE, destroying the C-F bond on the surface, making it remove part of the fluorine atoms on the surface, forming a carbonized layer and some polar groups on the surface of PTFE, but its disadvantages are: (1 ) After treatment, the surface of PTFE becomes darker or even brownish black; (2) After long-term exposure to light, the bonding performance will decrease significantly; (3) A large amount of waste liquid needs to be processed, and the operation is highly dangerous.
Therefore, the current domestically produced PTFE silicone pressure-sensitive adhesives are all brown in color, which cannot meet the needs of certain environments.
In addition, the waste liquid produced by sodium natrium treatment technology pollutes the environment extremely seriously, and does not meet the increasingly stringent environmental protection requirements in China.

Method used

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  • Manufacturing method of polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape
  • Manufacturing method of polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape
  • Manufacturing method of polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Put the polytetrafluoroethylene film roll into the plasma processing equipment, adjust the distance between the film and the electrode plate to 10CM, close the chamber door of the equipment, and start the vacuum pump. After being vacuumed to 30PA, low-temperature and low-pressure plasma is used to impact the surface of the polytetrafluoroethylene film for surface modification. The processing parameters are: by adjusting the rewinding and unwinding speed, the processing time is controlled at 4 minutes, the processing power is 10KW, the temperature is 25°C, the working gases used are nitrogen and hydrogen, the gas flow rate of nitrogen gas is 200 sccm, the gas flow rate of hydrogen gas is 150 sccm, and the working pressure is 50Pa. After the treatment, the water contact angle of the polytetrafluoroethylene film was tested with a contact angle meter. Such as figure 2 , 3 As shown, after detection, the contact angle after plasma treatment according to this treatment...

Embodiment 2

[0030] (1) Put the polytetrafluoroethylene film roll into the plasma processing equipment, adjust the distance between the film and the electrode plate to 5CM, close the chamber door of the equipment, and start the vacuum pump. After being vacuumed to 30PA, low-temperature and low-pressure plasma is used to impact the surface of the polytetrafluoroethylene film for surface modification. The processing parameters are: by adjusting the winding and unwinding speed, the processing time is controlled at 0.5min, the processing power is 20KW, the temperature is 40°C, the working gases used are nitrogen and hydrogen, the gas flow rate of nitrogen gas is 100 sccm, and the gas flow rate of hydrogen gas is 800 sccm. The air pressure is 250Pa. After the treatment, the water contact angle of the polytetrafluoroethylene film was tested with a contact angle meter. After testing, the contact angle after plasma treatment according to this treatment parameter is 85.8°. After standing for one ...

Embodiment 3

[0034] (1) Put the polytetrafluoroethylene film roll into the plasma processing equipment, adjust the distance between the film and the electrode plate to 30CM, close the chamber door of the equipment, and start the vacuum pump. After being vacuumed to 30PA, low-temperature and low-pressure plasma is used to impact the surface of the polytetrafluoroethylene film for surface modification. The processing parameters are: by adjusting the winding and unwinding speed, the processing time is controlled at 8 minutes, the processing power is 1KW, the temperature is 0°C, the working gases used are nitrogen and hydrogen, the gas flow rate of nitrogen gas is 800 sccm, the gas flow rate of hydrogen gas is 50 sccm, and the working pressure is 5Pa. After the treatment, the water contact angle of the polytetrafluoroethylene film was tested with a contact angle meter. After testing, the contact angle after plasma treatment according to this treatment parameter is 65.8°. After standing for o...

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Abstract

The invention discloses a manufacturing method of a polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape. The manufacturing method comprises the following steps: 1) performing low-temperature and low-pressure plasma treatment on a polytetrafluoroethylene film; 2) coating the polytetrafluoroethylene base material subjected to plasma treatment with a primer; and (3) smearing an organic silicon pressure-sensitive adhesive on the surface of the polytetrafluoroethylene film coated with the primer, and conducting drying to obtain a final product. The preparation method is simple to operate and short in process, pollution can be effectively avoided, energy consumption is reduced, the appearance of the film is not affected after low-temperature and low-pressure plasma treatment is carried out on the polytetrafluoroethylene film, the excellent characteristics of polytetrafluoroethylene are reserved, the performance of the prepared polytetrafluoroethylene organic silicon pressure-sensitive adhesive tape can be effectively kept for a long time, a and the adhesive tape can be used in various environments and is wider in application range.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesive tapes, in particular to a method for making polytetrafluoroethylene silicone pressure-sensitive adhesive tapes. Background technique [0002] Polytetrafluoroethylene, also known as Teflon (Teflon) or PTFE for short, has the most stable performance among all plastic products: acid resistance, alkali resistance, high temperature resistance, dielectric resistance, and is not easy to chemically react with other substances, so there are plastics King of the good name. It is its chemical stability that makes the material inert and difficult to bond with other materials. The surface energy of PTFE is particularly low, and its contact angle with water is 114°, which is the largest among all materials. For bonding, wetting contact is the primary condition for bonding. The larger the contact angle, the poorer the wetting ability, so the adhesive cannot adhere well to PTFE, so that it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24C09J7/38C09J183/04C08J7/12C08J7/043C08L27/18
CPCC09J7/245C09J7/38C09J183/04C08J7/123C08J7/043C08J7/0427C09J2427/006C08J2327/18C08K5/14
Inventor 王鹏杨鸿程
Owner 嘉兴高正新材料科技股份有限公司
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