Bio-based polyurethane pressure sensitive adhesive

Pressure-sensitive adhesiveness is the property of the material to achieve permanent bonding to the substrate even under relatively weak application pressure. A substance with this property is called a pressure sensitive adhesive (PSA). Pressure sensitive adhesives have long been known. Usually, they can be re-separated (stripped) from the substrate with little residue after use.

Typically, pressure-sensitive adhesives are permanently inherently viscous at room temperature and therefore have a certain viscosity and adhesiveness, so they wet the surface of the corresponding substrate even at low application pressure. The ability of pressure sensitive adhesives to adhere to materials and transfer force comes from the adhesion and cohesion of pressure sensitive adhesives. Efforts have been made over the years to manufacture plastics based on renewable raw materials due to environmental factors and sustainable development, and against the background of the increasing scarcity of crude oil resources and, on the other hand, the dramatic increase in plastics consumption worldwide.

This is particularly true for biodegradable polymers, which are used for packaging applications or membrane applications. Also for medical applications, biodegradable products are playing an increasingly important role. As environmental factors related to biodegradability are playing an increasingly important role (for pressure-sensitive tapes), the use of biodegradable membranes as support materials for pressure-sensitive tapes has been proposed in the past. However, the existing polyurethane pressure sensitive adhesive is mainly composed of polyether polyols or polyester polyols, which takes a long time to completely degrade in the environment and is not easy to be coated on degradable carrier materials.

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 the pollution to the environment and is an ideal environmental protection product.

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