Our solvent based adhesives are also called Pressure Sensitive Adhesives(PSAs). These are a type of adhesive that quickly stick and peeled when needed. Because of their convenience, PSAs are widely used in various applications and fields such as packaging, electronics, optics, automobiles, construction materials, and medicine. Particularly in the electronics, optical and medical fields, there is a demand for high performance adhesives, with particularly important features such as removability that allows the adhesive to be peeled off with light force and stability of adhesive properties. The “POLYTHICK” series, acrylic type PSAs of Sanyo Chemical are now available.
Solvent Based Adhesives, Acrylic Resin Adhesives Made - POLYTHICK
Properties of Transparent Solvent Based Adhesives Made from Acrylic Resin
In order for an adhesive to adhere, it must have adhesion when touched (“Tackiness”) and “Adhesion Strength” that is appropriate for the purpose. In order to maintain adhesion, the adhesive must be able to withstand shear and maintain its adhesive state(“Holding Power”). On the other hand, the adhesive must be able to be peeled off cleanly(“Removability”). These seemingly contradictory functions can be achieved by the viscoelasticity of the adhesive. The adhesive properties are related to dynamic viscoelastic behavior, and the higher the storage elastic modulus (G’) of the adhesive, the better to increase adhesion strength and retention. However, if the elastic modulus becomes too high, it becomes too hard as an adhesive and the contribution of viscosity becomes low, and there is a lack of adhesion at the interface with the adhesion, so there is a peak in the holding power and elastic modulus. When removability is important, the adhesive should have a high cohesive strength so that the adhesive will only peel off at the interface between the adhesive and the adherend, and there will be no adhesive residue or damage to the adherend, and the composition is designed to provide adhesive properties that meet the purpose.