Causes of difficulty in peeling acrylic pressure sensitive adhesive and residual glue in the peeling process

The acrylic pressure-sensitive adhesive has no need to add antioxidants, has good bonding strength, good transparency, medium resistance and no phase separation and migration, and other excellent properties, is the most widely used pressure-sensitive adhesive in the market. However, the existing acrylic pressure-sensitive adhesive on the market in the actual use of the process, such as the pressure-sensitive adhesive bonded on the surface of the bonded material, generally after a period time to uncover, short only a few minutes, and long in more than 1 year with the increase of the use of time, pressure sensitive adhesive often peeling difficulties and peeling process is very easy to appear residual glue problems, Strong stripping will lead to the destruction of the surface of the bonded material, and the residual pressure sensitive adhesive on the surface of the bonded material after stripping can not be easily removed, which not only seriously affects the aesthetic appearance of the surface of the material, but also leads to the pollution of the bonded material.

Research shows that acrylic pressure-sensitive adhesive stripping difficulties and stripping in the process of residual glue for the following three reasons, one of the most common is the peeling strength of pressure-sensitive adhesive after a period of time has changed, after bonding in the surface of the bonded material, generally after a period of time to uncover, short only a few minutes, and long in more than 1 year, in this period of time, The peeling strength of pressure sensitive adhesive tends to increase with the continuation of time, usually first fast and then slow, and finally stable. When the peel strength rises to exceed the cohesive strength or adhesive base force, cohesive failure or adhesive base failure will occur, resulting in residual glue. Another reason is the aging of pressure-sensitive adhesives.

Pressure-sensitive adhesive belongs to the polymer. After being subjected to heat or long-time ultraviolet irradiation, the macromolecular chain of pressure-sensitive adhesive breaks, the average molecular weight decreases, the cohesion strength decreases, and then cohesion failure occurs. In addition, compatibility with the surface material of the bonded material is also an important factor causing residual glue. With the passage of time, the surface of the pressure-sensitive adhesive and the bonded material gradually fused with each other due to the compatibility phenomenon, causing the peeling strength to rise, resulting in cohesive failure or adhesive base failure; Or some small molecules in the pressure sensitive adhesive layer are compatible with the protected surface, so as to migrate from the pressure sensitive adhesive to the protected surface, resulting in migration residue.

Acrylic pressure-sensitive adhesive supplier

As a professional acrylic pressure-sensitive adhesive supplier, Smprotectivefilm is committed to solving the glue problems encountered by customers due to different production equipment and processes.

Compared with traditional solvent-based pressure-sensitive adhesive, our emulsion pressure-sensitive adhesive has the advantages of environmental protection, safety, and easy operation. Using deionized water instead of traditional solvent reduces pollution to the environment and is an ideal environmental protection product.

By adjusting the proportion of the curing agents, pressure-sensitive adhesives with different adhesive forces can be obtained to meet the needs of different applications. Suitable for a variety of materials, transparent after drying.