| 摘要 |
A carton having a sufficient strength used to pack frozen meat was prepd. from paperboard having thickness 20/100-80/100mm, density 0.62-0.95g/cm3, and bursting strength 3.5-14.0kg/cm2. Thus, multilayer paperboards having thickness 50-100 mm and density 0.78g/cm3 was embossed with prominance and depression materials having 2.5mmX4.5mmX2mm to give products having ventilation degree 4500 sec/100cc, water absorption 60g/m2, and bursting strength 10.5kg/cm2.
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