| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a bubble-enclosed adhesive tape or sheet capable of realizing large bubble diameters regardless of types of substrates and enabling the verification of a homogeneously foamed state even when magnified by 100 times.SOLUTION: The provided manufacturing method of a bubble-enclosed adhesive tape or sheet is a method for manufacturing a bubble-enclosed adhesive tape or sheet wherein a bubble-enclosed tackifier layer is formed on at least one side of a substrate and comprises a melting step of heating and melting a tackifier raw ingredient including a thermoplastic resin till the melt viscosity thereof reaches 5000-200000 mPa s, a mixing step of adding 25-80 parts.vol. of a component gaseous at normal temperature and normal pressure to 100 parts.vol. of the tackifier raw ingredient melted and mixing within an environment wherein the liquid pressure is maintained at 3-10 MPa, and a pressure release step of forming, upon the completion of the mixing step, bubbles within the tackifier layer by releasing the pressure impressed onto the tackifier raw ingredient. |
