Advantages of PCTFE composite pressure-sensitive adhesive

The PCTFE composite pressure-sensitive adhesive has the advantages of simple, convenient, rapid, and efficient bonding.

Polytrifluorochloroethylene (PCTFE) is the earliest development of industrialized production of thermoplastic fluorine plastic, and familiar with poly (tetrafluoroethylene (PTFE) than in molecular PCTFE C- Cl keys, partly destroyed the molecular symmetry and nonpolar, polymer structure determines the performance of the polymer.

This makes it can be thermoplastically processed (213 ℃) with the melting point of the 211-into the required shape of the products, and its hardness, stiffness, and creep resistance of PTFE are improved. Due to the special molecular structure, PCTFE exhibits excellent creep resistance, low dielectric properties, gas barrier properties, and optical transparency in addition to the common properties of fluoropolymers such as good heat resistance and chemical corrosion resistance.

PCTFE film has excellent moisture resistance and is suitable for barrier use. Within the scope of the uv- visible has light through sex, and it has excellent corrosion resistance, and long-term corrosion in acid, alkali, and organic solvents under no change. So it has a wide range of applications in medicine, communication, optics, and other fields. In practical application scenarios, PCTFE is usually used as one of the layers, and other materials play a certain auxiliary role for PCTFE (such as PVC support in drug encapsulation blister), which can also reduce its usage and thus reduce costs.

However, the high fluorine content of PCTFE makes it difficult to compound with other materials or the compound stability is poor, which restricts the application of PCTFE to a great extent. Therefore, it is necessary to improve the composite effect of PCTFE film with other materials and expand its application range on the premise of ensuring its transparency and water resistance. At present, there is no commercial product related to PCTFE composite pressure-sensitive adhesive in China.

The reasons are as follows: (1) The pressure-sensitive adhesive layer is mostly hydrophilic, while PCTFE is a hydrophobic material, so it is difficult to combine the two. (2) The hydrophilic modification of PCTFE is difficult, which is easy to cause the loss of water resistance and optical and mechanical properties. (3) Although traditional irradiated surface modification may solve the above hydrophilic modification problems of PCTFE, the irradiation energy is generally large, which is easy to cause the molecular fracture and decomposition of PCTFE, resulting in yellow and black materials, deterioration of mechanical properties, thermal stability, electrical breakdown, and other problems. (4) The application scenario of PCTFE composite pressure-sensitive adhesive is unknown. Compared with the traditional pure PCTFE film heat sealing method, the PCTFE composite pressure-sensitive adhesive has the advantages of simple, convenient, rapid, and efficient bonding of the adhesive.