Patent ID: 9427923
Filing Date: 2016-08-30
CPC Classification: B29C,B29D,B29K,B65D

Claim Text:
1. The manufacturing method of food packing material having hydrophobicity, comprising: (a) preparing a mold in which a number of grooves are formed, and (b) forming a number of the columns corresponding to the groove in one side of the food packing material by pressurizing the mold to the food packing material, wherein (a) the preparing of the mold includes: (a-1) preparing a first metal layer; (a-2) laminating a photoresist film at a top of the first metal layer; (a-3) patterning the photoresist film and forming a number of the photoresist patterns to be spaced at a predetermined interval each other; and (a-4) forming the mold by laminating a second metal layer at the first metal layer.