Biaxially oriented polypropylene resin film

A polypropylene-based resin and biaxial orientation technology, which is applied to synthetic resin layered products, flexible coverings, packaging, etc., can solve the problems of unsmooth transportation of films, wrinkles of bags, etc., and achieve smooth automatic packaging processing , fewer wrinkles, and less air regurgitation

Active Publication Date: 2019-11-26
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is a problem that after the contents are wrapped in this film, wrinkles are introduced into the bagged products obtained by continuous heat-sealing bag-making processing, so-called automatic packaging processing, or smooth transportation is not possible in the automatic packaging processing process. film

Method used

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  • Biaxially oriented polypropylene resin film
  • Biaxially oriented polypropylene resin film
  • Biaxially oriented polypropylene resin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] The resin composition constituting each layer used in Example 1 is as follows.

[0167] (1) Substrate layer (A) Constituent resin composition

[0168] Glycerin monostearate (Matsumoto Yuyu Pharmaceutical Co., Ltd., TB-123) 0.16% by weight, polyoxyethylene (2) stearylamine (Matsumoto Yuyu Pharmaceutical Co., Ltd.) as an antifogging agent was added to [PP-1]. Company, TB-12) 0.2% by weight, polyoxyethylene (2) stearylamine monostearate (Matsumoto Yushi Pharmaceutical Co., Ltd., ELEX 334) 0.6% by weight as [PP-4], the substrate layer ( A) Constituent resin composition uses 100% by weight.

[0169] (2) Intermediate layer (B) constitutes resin composition

[0170] In [PP-2], 1.5% by weight of organic polymer microparticles (CS30: Sumitomo Chemical Co., Ltd.: particle size 3.5 μm) and glycerin monostearate (Matsumoto Yushi Pharmaceutical Co., Ltd., TB) as an antifogging agent were melt mixed. -123) 0.45% by weight so that the resin temperature becomes 240° C., and it is fo...

Embodiment 2

[0179] A laminated film was obtained in the same manner as in Example 1 except that the resin composition constituting the intermediate layer (B) was a mixture of [PP-1] 10% by weight and [PP-5] 90% by weight. The obtained laminated film had sufficient heat-sealing strength and attainment strength at low temperatures as in Example 1, and was compatible with airtightness, suitability for automatic packaging, stiffness of bag-making products, and air reflux after degassing packaging. And the anti-fogging property has also become a level that does not pose a problem to fruit and vegetable packaging. Table 1 shows the film composition and physical property results.

Embodiment 3

[0181] A laminated film was obtained in the same manner as in Example 1 except that the resin composition constituting the intermediate layer (B) was a mixture of 50% by weight of [PP-1] and 50% by weight of [PP-5]. The obtained laminated film had sufficient heat-sealing strength and attainment strength at low temperatures as in Example 1, and was compatible with airtightness, suitability for automatic packaging, stiffness of bag-making products, and air reflux after degassing packaging. And the anti-fogging property has also become a level that does not pose a problem to fruit and vegetable packaging. Table 1 shows the film composition and physical property results.

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Abstract

The present invention provides a polypropylene resin film that has heat seal strength and sealing properties adequate for packaging a heavy object and that is also suitable for automatic packaging. Abiaxially oriented polypropylene resin film comprising a substrate layer (A), an intermediate layer (B), and a seal layer (C), the melting point of a resin constituting part of the substrate layer (A)and the seal layer (C) being in a specific range, and the thickness of each of the intermediate layer (B) and the seal layer (C) furthermore being set so that the ratio thereof with respect to the thickness of all the layers is in a specific range.

Description

technical field [0001] The present invention relates to a biaxially oriented polypropylene resin film, and more specifically, to a biaxially oriented polypropylene resin film having sufficient heat-sealing strength and airtightness for packaging heavy objects and being suitable for automatic filling packaging film. Background technique [0002] Conventionally, as heat-sealable films for packaging, laminated polypropylene-based resin films laminating unstretched polyethylene-based resin films or unstretched polypropylene-based resin films with stretched polypropylene have been widely used. A laminated polypropylene-based resin film of a resin film; or a laminated polypropylene-based resin film obtained by laminating a co-extruded low-melting-point polyolefin-based resin layer on a layer formed of a high-melting-point polypropylene-based resin and stretching . [0003] However, a laminated polypropylene-based resin film in which an unstretched polyethylene-based resin film o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B65D65/40
CPCB32B27/32B65D65/40
Inventor 今井徹山田浩司
Owner TOYOBO CO LTD
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