Degradable kraft paper composite paper

Abstract

The invention relates to degradable kraft paper composite paper which comprises kraft paper, a first protective coating, an aluminum coating and a second protective coating which are sequentially arranged. The first protective coating comprises butyl acrylate, styrene or methyl methacrylate, and the second protective coating comprises butyl acrylate, styrene or methyl methacrylate. By adopting the scheme, the degradable kraft paper composite paper is provided, the first protective coating, the aluminum coating and the second protective coating are sequentially arranged on the surface of the kraft paper, and the degradable kraft paper composite paper can be synchronously and naturally degraded with the kraft paper or recycled for pulping under the condition of ensuring the metallic luster of the aluminum coating.

Description

technical field [0001] The invention relates to a degradable kraft composite paper and a processing technology thereof. Background technique [0002] Kraft paper (kraftpaper), used as packaging material. The intensity is high. Usually yellowish brown. Semi-bleached or fully bleached kraft pulp is light brown, cream or white. Quantitative 80 ~ 120g / m2. The fracture length is generally above 6000m. Tear strength, work of rupture and dynamic strength are high. Mostly roll paper, but also flat paper. Using kraft softwood pulp as raw material, after beating, it is made on fourdrinier paper machine. It can be used as cement bag paper, envelope paper, glue-sealing paper, asphalt paper, cable protection paper, insulating paper, etc. [0003] Chinese patent application number CN201710485922.X discloses a kraft paper composite packaging material. By arranging an aluminized film on the surface of the kraft paper composite material, it has beautiful appearance, barrier propertie...

AI Technical Summary

Problems solved by technology

[0004] The problem with the existing kraft composite paper is that although the aluminized film has the advantages of convenient processing on kraft paper and excellent barrier properties, its biggest disadvantage is that the aluminized film is difficult to degrade, and the kraft composite paper is used as a packaging material. After use, it is usually discarded and recycled directly, that is, the service life is short. Among them, although the kraft paper composite paper that is directly discarded can be naturally degraded, the non-degradable aluminized film will eventually produce non-degradable garbage. Among them, the recycled kraft composite paper is usually pulped to achieve reuse. Similarly, the aluminized film cannot be decomposed through the pulping process, which makes recycling inconvenient. The reason is that the service life of kraft paper and aluminized film exists. There is a huge difference, and the compatibility between the two is low

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