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Laminated film for paper pulp moulded goods

A technology for laminating films and moldings, applied in the direction of roll-resistant paper, layered products, surface covering paper, etc., capable of solving hygiene problems, leakage, etc.

Active Publication Date: 2004-07-28
NICHIWA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When using such pulp molded products such as food packaging, directly filling food in the pulp molded product not only causes a hygienic problem, but also moisture and oil contained in the food penetrate into the pulp molded product, causing leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this example, an amorphous unstretched polyethylene terephthalate (PET) film (manufactured by Towa Chemical Industry Co., Ltd., 30 μm thick) was used for the surface layer, and one side of the surface layer was provided with an adhesion-promoting coating layer. An intermediate layer formed of low-density polyethylene (LDPE) (Sumikasen L705, 15 μm manufactured by Sumitomo Chemical Industries, Ltd.) was laminated by extrusion lamination as a bonding layer with polyethylene and A film formed of a mixed resin of an ethylene copolymer (Bondine SC-6, 30 μm, manufactured by Sumitomo Chemical Industries, Ltd.).

Embodiment 2

[0047] In place of the bonding layer used in Example 1, a film (Melsen MX302, 30 μm, manufactured by Tosoh Corporation) was co-extruded with an ethylene copolymer resin and polyethylene. Others are the same as in Example 1.

Embodiment 3

[0049] In place of the bonding layer used in Example 1, an ethylene copolymer resin (Sumitomo Chemical Industries, Ltd. Aclift WH303, 25 μm) having a content of methyl methacrylate as a comonomer of 18% was used. Others are the same as in Example 1.

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Abstract

In the laminated film, a surface layer of a polyolefin resin or a polyester resin and an adhesive layer which is made of a polyolefin resin containing an ethylene copolymer of at least 5 wt.% of a comonomer content and is stuck to the pulp molding are laminated through an intermediate layer of a polyolefin resin.

Description

technical field [0001] The present invention relates to a laminated film for pulp molded products, which not only has good adhesion and excellent moldability when attached to the surface of pulp molded products, but also can make pulp molded products have high water resistance, oil resistance, and water resistance after attachment. Laminating film for thermal pulp moldings. Background technique [0002] Pulp molded products are mostly used as pallets for egg transportation, cushioning materials for transportation of fruits such as apples and pears, and cushioning materials for transportation of industrial products. They are also commonly used as pallets for prepackaging fresh foods. Manufactured by laminating pulp and water to disperse old paper into a slurry-like raw material and then drying it. [0003] The pulp molded products produced in this way are relatively cheap, can save and simplify packaging, storage, handling and labor, etc., and at the same time, because of th...

Claims

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Application Information

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IPC IPC(8): B65D1/00B32B27/32B32B27/36B65D1/09C08L101/16D21H27/14D21H27/18
CPCY02W90/10
Inventor 齐藤博根岸夏朗久保幸治
Owner NICHIWA ELECTRIC
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