Production method and equipment of drench film coated by PLA biological decomposition material

Abstract

The invention relates to a method for preparing a polylactic acid (PLA) biodegradable material for lamination and coating, as well as a device thereof. The proposal of the invention is as follows: the PLA biodegradable particles are dried by a drier until the water content reaches a certain standard; the PLA biodegradable particles are heated and melted by a screw conveyor and put into a lamination header by a delivery elbow simultaneously to extrude out a membrane; the lamination machine is pushed to a certain position and the lamination header is located between two rollers of a rolling machine; the displacement of the lamination header left-to-right is controlled by a transverse oil pressure cylinder so as to locate the lamination header at the central position of the two rollers; simultaneously the rolling machine is controlled to lift up and down so as to lift a lamination point between the two rollers to a predetermined distance from a material outlet of the lamination header, therefore, the membrane is laminated or coated on the ground paper or a thin wood paper board to finish quick adhesion more easily so as to provide a paper-made container and achieve the environment-friendly effect of natural degradation.

Description

technical field [0001] The invention relates to a method and a device for coating a PLA biodegradable material. Background technique [0002] General paper products (such as: paper cups, paper bowls, paper plates, paper boxes, paper bento boxes, beverage cartons, non-woven fabrics, paper containers, etc.), in order to prevent leakage when carrying food, Usually, the inner surface of the paper sheet of the paper product is covered with a layer of PE coating. However, the coating layer cannot be decomposed naturally, causing secondary damage to the environment. Therefore, a PLA biodegradable material has been developed. The above-mentioned materials are used to directly make containers, which are not only naturally decomposable and non-toxic, which can achieve environmental protection effects, but also contain liquids or food in a short period of time without the risk of immediate decomposition. Contents of the invention [0003] Aiming at the deficiencies in the prior art,...

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a method for coating PLA biodegradable materials and its device. The problem to be solved is that PLA biodegradable materials are expensive, and for disposable containers products, the burden on consumers is extremely heavy, and it cannot be universalized; and the use of PLA biodegradable materials to directly make containers is quite high, and the degree of waste is also high, and its cost cannot be reduced, and if PLA is directly used If the biodegradable material is draped on the paper, it cannot be attached to the paper smoothly because the material has moisture, and it is easy to fall off, which is a major disadvantage

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