Patent ID: 8628711

Claim:
A method for producing an in-mold label, the method comprising: providing a thermoplastic resin substrate; applying a heat-sealable resin material on surface of the thermoplastic resin substrate; providing an embossing apparatus with surface structure; driving the embossing apparatus to perform a heating-embossing-cooling process to form a heat-sealable resin layer with interlaced and continuous-arranged nearly-rectangular micro-protrusions upon the surface of the thermoplastic resin substrate using the embossing apparatus to create such surface structure; wherein the protrusion has a depth of from 8 micrometer to 14 micrometer, spacing among the protrusions is from 10 micrometer to 1000 micrometer, and one side of the nearly-rectangular formed micro-protrusion is around from 1000 micrometer to 1600 micrometer; and forming a printed layer, the thermoplastic resin substrate, and the heat-sealable resin layer, which are combined to form the in-mold label; wherein, while the in-mold label is combined on a surface of an article, the micro-protrusions render multiple blister-exhausting paths.