The disadvantages of this method are:

① The dimensional stability of PTFE is poor at high temperature and it is difficult to maintain its shape;

② The bonding force between the filler and the PTFE matrix is ​​small, which affects the highest bonding strength. The results of the study showed that the bonding strength of PTFE before and after treatment was increased from 7.

The advantages of this method are:

① Good weather resistance, humidity and heat resistance;

② Suitable for long-term outdoor use.The high temperature melting modification method is to sinter some fillers with strong surface activity, easy adhesion and small particle size (such as silica, aluminum powder, etc.

Based on the high-temperature melting method, Fu Zhaoxia and others added an inorganic additive LW to PTFE, which effectively improved the bonding performance of the PTFE sheet.

Guo Jinyan and others used silane coupling agent to improve the melting method.) to the surface of PTFE under high temperature conditions to change the structure of the PTFE surface And properties to achieve the purpose of improving bonding ptfe film adhesive tape strength.8 MPa to 9.

When LW is surface-treated with a silane coupling agent, the adhesion performance of the PTFE sheet is further improved, and its peel strength and shear strength reach the maximum when w(LW)=10%