Paper-plastic pipe preparation method and paper-plastic pipe

Abstract

The embodiment of the invention provides a paper-plastic pipe preparation method and a paper-plastic pipe, and relates to the technical field of paper-plastic products. The paper-plastic pipe preparation method comprises the following steps that: an oxygen barrier material is arranged on a first surface of a paper layer to form an oxygen barrier film; a waterproof material is arranged on a second surface of the paper layer to form a second waterproof film; a waterproof material is arranged on the surface of the oxygen barrier film to form a first waterproof film and obtain a paper-plastic sheet, and the paper-plastic sheet comprises the first waterproof film, the oxygen barrier film, the paper layer and the second waterproof film which are stacked in sequence; and the paper-plastic sheet is subjected to curling and edge sealing waterproof treatment to obtain the paper-plastic pipe. The paper-plastic pipe preparation method can realize the technical effect of improving the waterproof performance of the paper-plastic pipe on the premise of ensuring environmental protection and recyclability.

Description

technical field [0001] The present application relates to the technical field of paper-plastic products, in particular, to a method for preparing a paper-plastic tube and the paper-plastic tube. Background technique [0002] The current toothpaste tube or cosmetic tube is mainly composed of a tube body, a tube shoulder, and a tube cap; among them, the hose tube body is mainly made of aluminum-plastic sheet, all-plastic sheet, and non-barrier sheet; the tube shoulder is a high-density polymer Vinyl, cap is polypropylene. Aluminum-plastic sheet has excellent fragrance retention and barrier properties, but because the aluminum foil cannot be peeled off and recycled at present, the aluminum-plastic sheet cannot be recycled into a hazardous waste product; all-plastic sheet, medium polyethylene cannot be recycled, although It is stipulated that the polyethylene content ≤5% can meet the recycling requirements, but because the outer film and inner film contain high-density polyethy...

AI Technical Summary

Problems solved by technology

Aluminum-plastic sheet has excellent fragrance retention and barrier properties, but because the aluminum foil cannot be peeled off and recycled at present, the aluminum-plastic sheet cannot be recycled into a hazardous waste product; all-plastic sheet, medium polyethylene cannot be recycled, although It is stipulated that the polyethylene content ≤5% can meet the recycling requirements, but because the outer film and inner film contain high-density polyethylene / low-density polyethylene, and the coating film is also low-density polyethylene, the content of low-density polyethylene is high, and the material is not single , leading to the inability to enter the recycling flow of high-density polyethylene blow molding bottles, and can only become hazardous waste products; although non-barrier sheets have certain recyclability, no barriers lead to no fragrance retention; the current environmental awareness of consumers has Gradually strengthened, the demand for environmentally friendly packaging materials is increasing; because paper is made of wood pulp, it is natural and environmentally friendly, and it is a good material to replace and reduce the application of plastics

[0003] In the prior art, the main structure of the paper-plastic pipe is the outer film high-density polyethylene + low-density polyethylene / / low-density polyethylene + ethylene / paper / / low-density polyethylene / inner film high-density polyethylene + low-density polyethylene Ethylene + ethylene-vinyl alcohol copolymer; for the current paper-plastic tubes, although some manufacturers improve the waterproofness of the surface and inner layer of the paper by soaking the paper or adding a waterproof coating to the surface, the sealing The paper-plastic tube sheet at the edge is overlapped up and down, with a width of about 1-3mm. The entire cross-section of the paper-plastic tube sheet in the inner layer of the actual edge banding is in direct contact with the paste. After long-term contact, the substances in the paste and Moisture can seep into the cross-section, causing dampness and even mildew to the paper

[0004] Therefore, although the paper of the paper-plastic tube replaces the polyethylene plastic, which can reduce the use of polyethylene plastic and reduce the carbon footprint, but because the paper is easy to get wet when exposed to water, even if some manufacturers treat the surface of the paper, it is difficult to avoid the inside of the edge banding. The paper of the layer sheet is immersed in the paste and gets damp, which makes the current paper-plastic tube unable to be widely used

At the same time, at present, the inner and outer layers of paper-plastic pipes are mainly made of polyethylene materials, which are not recyclable and non-degradable, resulting in serious environmental pollution.

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