| 摘要 |
PROBLEM TO BE SOLVED: To provide lightproof paper and a lightproof paper cup that hide a black layer even when milk fat and moisture invade from the section of the lightproof paper.SOLUTION: In a lightproof paper with a shading layer formed between paper substrates, a paper substrate, a black layer containing black pigment and thermoplastic resin, a white layer containing white pigment and thermoplastic resin, a resin layer containing thermoplastic resin, and an oil resistance paper substrate with grease resistance (a kit value by TAPPI pulp and paper test method NO. 41-83) of equal to or more than 1 are laminated in this order. |
