| 摘要 |
PURPOSE: A corrugated cardboard envelope is provided to prevent the generation of environmental pollution using recyclable materials and eco-friendly materials without vinyl and polystyrene. CONSTITUTION: A Corrugated cardboard includes envelope paper. The envelope paper includes corrugated paper(13) and a cover layer. The concavo-convex shaped of corrugated paper is integrated with the cover layer. Sewing parts(4) are formed on both sides of the envelope paper. Two cutting parts(6) are vertically formed at inner side of the sewing parts. A folding part is formed in the envelope paper.
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