Paper-wood coating manufacture method and paper-wood coating component

Abstract

The invention provides a paper-wood coating manufacture method and a paper-wood coating component. The manufacture method comprises the following steps: an original material containing PP and PE is mixed and pelletized to obtain a second raw material; a first raw material and the second raw material are mixed, heated, fused and stirred, wherein the first raw material is PP, the stirred raw materials are pelletized, the pelletized raw materials are heated and fused, the heated and fused raw materials are extruded via an extruder to form a coating, and the coating covers the surface of paper wood so as to provide the paper-wood coating which is high temperature resistant, and has excellent yield and quality.

Description

technical field [0001] The invention relates to a manufacturing method of a paper material coating film and a composition of the paper material coating film. Background technique [0002] In order to prevent liquid from infiltrating the paper, the paper food container is usually covered with a plastic coating on the inner and outer surfaces to achieve a waterproof effect. The conventional coating usually uses polyethylene (PE) as the main component. It is easy to be evenly coated on the paper. However, the heat-resistant temperature of polyethylene is only limited to about 60 °C, and it is only suitable for cold drinks. In addition, in order to avoid the decomposition of the coating caused by high energy, the coated paper container with polyethylene as the main component cannot be heated by microwave. [0003] On the other hand, in order to overcome the above shortcomings, a small number of paper containers use polypropylene (PP) as the raw material. The heat-resistant temp...

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Problems solved by technology

[0002] Paper food containers are usually covered with a plastic coating on the inner and outer surfaces to achieve waterproofing in order to prevent liquid from soaking into the paper. The conventional coating usually uses polyethylene (PE) as the main component, and polyethylene has a fluidity. Good, easy to cover evenly on the paper, however, the heat-resistant temperature of polyethylene is only about 60 ℃, it is only suitable for cold drinks, if it is filled with hot drinks, the coating may decompose and release toxic substances, causing the contents Contaminated, in addition, in order to avoid high-energy cause coating decomposition, the paper container with polyethylene coating as the main component cannot be heated by microwave

[0003] On the other hand, in order to overcome the above shortcomings, a small number of paper container coatings use polypropylene (PP) as a raw material. The heat-resistant temperature of polypropylene can reach about 135°C, which is enough to hold hot drinks and can also be heated by microwaves. However, polypropylene The fluidity is very poor. During the coating operation, the polypropylene will harden and form when it meets the air during the flow coating process. Therefore, it is impossible to smoothly cover the polypropylene raw material evenly on the surface of the paper and form it, or it needs to be replaced. A large amount of raw materials are coated, and the quality of the coating that hardens too quickly is uneven, and it is easy to produce multiple blocks with uneven concentrations, which reduces the yield rate. If multiple coatings are performed to strengthen the quality, it will not only increase the weight, but also increase the quality of the coating. also increased costs

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