Adhesive properties of acrylic pressure sensitive tape

When the average molecular weight of acrylate copolymer was 406kDa, the initial adhesive force was 13, the continuous adhesive force was 0.3±0.06, and the 180° peeling force was 18.0±0.6N/25mm. When the average molecular weight of acrylate copolymer was 490kDa, the initial adhesive force of adhesive tape was 12, the continuous adhesive force was 0.5±0.05, and the 180° peeling force was 11.0±0.12N/25mm. When the average molecular weight of acrylate copolymer was 495kDa, the initial adhesive force of adhesive tape was 10, the sustained adhesive force was 0.9±0.08, and the 180° peeling force was 6.8±0.58N/25mm.

The results show that the copolymer station elasticity and the wetting characteristics of the bonded material affect the adhesive ability of the acrylic pressure sensitive tape. At the same time, the low molecular weight acrylic copolymer has better fluidity and bonding performance.

Application of acrylic pressure sensitive tape

Acrylic pressure-sensitive adhesive tapes are widely used, so we mainly discuss the application scenarios of functional acrylic pressure-sensitive adhesives emerging in recent years. Functional acrylate pressure-sensitive adhesives are mainly used in the electronics industry, medical industry, etc.

Medical pressure-sensitive tapes mainly use polyurethane, silicone rubber, and acrylic ester as the main raw materials. First of all, acrylic pressure-sensitive adhesive tapes are widely used in the medical field and have gradually replaced rubber-type medical pressure-sensitive adhesives. The acrylic medical pressure-sensitive adhesive has the characteristics of non-toxicity, no skin irritation, no allergic effect, and good air permeability. At the same time, it can control drug release from various channels and can be used in conjunction with external drug treatment.

Secondly, electronic components are developing toward miniaturization, and the rapid development in the field of polymer chemistry puts forward higher requirements for bonding technology, which promotes the development of the use of pressure-sensitive adhesives in the electronics industry. For example, the acrylate pressure-sensitive adhesive tape based on nickel powder has good electrical conductivity, which solves the problem that the connecting material is harmful to human health.

Some scholars synthesized acrylate pressure-sensitive adhesive tape by solution polymerization method and added an external linking agent to it to improve the cohesive properties of the adhesive tape. Subsequently, heat-expandable microsphere powder was added to it to develop a heat-peelable pressure-sensitive adhesive, which solved the problem of residual glue when the adhesive material was peeled off.