Soft and sticky materials used in cellphone holders, small sticky pads for non-invasive wall tacks, and other sticky surfaced products can be made of polyurethane gel compounds, which are intrinsically sticky inside and outside. When the surface is contaminated, a user can wash off the surface and it will be sticky again. Cut surfaces of polyurethane sticky pads are also sticky.
Processing polyurethane gel compounds do not involve drying out solvent carrier or need air or moisture to cure. It can be made into practically any thickness. Most of the polyurethane gel formulations can be processed at or near room temperature. The curing rate can be accelerated by the addition of catalysts and processing at an elevated temperature. This makes polyurethane gel-based sticky pad materials an ideal material choice for many specialty applications.
Northstar Polymers offers GK-7 and GK-22R formulations for sticky pad making applications. GK-7 formulation has the stickiness of commonly marketed cellphone holders and non-invasive wall-tack products. Our new GK-22R formulation makes products with a higher adhesion strength. Both formulations are made in such a way that the processor can adjust the stickiness of final products by some simple adjustment process.
