Polypropylene resin film for surface protection, and surface protective film

A technology of polypropylene and resin film, which is applied in the direction of synthetic resin layered products, film/sheet adhesives, layered products, etc., and can solve the problem of difficult lamination of transparent polypropylene sheets and insufficient rigidity of polypropylene films , easy to produce wrinkles and slack, etc., to achieve the effect of less white spots, excellent handling, and appropriate surface roughness

Active Publication Date: 2014-07-02
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the rigidity of the heat-sealable polypropylene film disclosed in Patent Document 1 is insufficient, and the transparent polypropylene sheet disclosed in Patent Document 2 is difficult to bond.
[0008] In addition, the polypropylene films for surface protection described in Patent Document 3 and Patent Document 4 also have high rigidity and poor lamination process adaptability.
[0009] In addition, there is a problem that wrinkles and slack are easily generated when the film is wound into a roll
[0010] In addition, there is a problem of film deformation when applying the adhesive

Method used

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  • Polypropylene resin film for surface protection, and surface protective film
  • Polypropylene resin film for surface protection, and surface protective film

Examples

Experimental program
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Effect test

Embodiment 1

[0170] 69 parts by weight of a homopolypropylene resin (MFR=7), 22 parts by weight of a block copolymer polypropylene resin (MFR=2) with a rubber content of 13.0% and an ethylene content of 6.5%, an elastomer manufactured by Mitsui Chemicals, Ltd. (trade name: タフマ-P0480) 7 parts by weight and 2 parts by weight of the masterbatch resin are melt-extruded with a T-die film-making machine with a hot bolt type automatic thickness control function, and the masterbatch resin contains: made of acrylic acid An acrylate antioxidant composed of a homopolypropylene resin (MFR=7) containing 5% by weight of Sumilazer GS (manufactured by Sumitomo Chemical Co., Ltd.) of the ester antioxidant was cooled at a cooling roll temperature of 60° C. for 2.0 seconds (manufactured Film speed 60m / min), draw ratio of molten resin 1.56 (die lip gap: 0.5mm, die lip outlet molten resin speed: 4.8m / min, air gap: 8cm), air chamber wind pressure 10mmHg Under film conditions, an unstretched film with a thicknes...

Embodiment 2

[0173] 13.0% / 95 parts by weight of a block copolymerized polypropylene resin (MFR=2) with an ethylene content of 6.5%, 5 parts by weight of a random copolymerized polypropylene resin (MFR=7) with an ethylene content of 3.0%, the temperature of the set cooling roll is 45°C, Except for this, the polypropylene-type resin film of Example 2 was obtained by the method similar to Example 1. The results are shown in Table 1.

[0174] The polypropylene-based resin film obtained in this example had all of the properties shown in Table 1 good and was of high quality.

Embodiment 3

[0176] Homopolypropylene resin (MFR) containing 0.15% by mass of Ilugahouse 168 (manufactured by Ciba Seika Co., Ltd.) =7) 85.5 parts by weight, 14.5 parts by weight of an elastomer (trade name: タフマ-P0480) manufactured by Mitsui Chemicals Co., Ltd., the cooling roll temperature is set to 50° C., and the drawing ratio during drawing of the molten resin is 2.50 (die lip The polypropylene-based resin film of Example 3 was obtained in the same manner as in Example 1 except that the gap: 0.8 mm, the velocity of molten resin at the lip outlet: 3.0 m / min, and the air gap: 8 cm). The results are shown in Table 1.

[0177] The polypropylene-based resin film obtained in this example had properties equivalent to those of the polypropylene-based resin film obtained in Example 1, and was of high quality.

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Abstract

Disclosed is a polypropylene resin film for surface protection, which has excellent thermal dimensional stability, planarity, impact resistance and bonding workability, while being reduced in fish eyes. The polypropylene resin film for surface protection is free from wrinkles or sags when the film is rolled into a roll. The polypropylene resin film is suitable, for example, for a base film of a protective film. Also disclosed is a protective film which is obtained by providing the polypropylene resin film for surface protection with an adhesive layer. Specifically disclosed is a polypropylene resin film for surface protection, which is substantially composed of a polypropylene resin and is characterized by having a xylene-soluble content at 20°C of more than 9% but less than 15%, a crystal nucleator content of not more than 100 ppm, a film thickness variation in the width direction of not less than 1% but not more than 10%, a coefficient of kinetic friction of not more than 1.0, and a tensile modulus of elasticity of not less than 500 MPa but not more than 900 MPa.

Description

technical field [0001] The present invention relates to a polypropylene-based resin film for surface protection and a surface protection film. Specifically, it relates to high thermal deformation resistance and planarity at high temperatures, excellent processing suitability such as adhesion processing, and less migration of additives, and further A polypropylene-based resin film for surface protection suitable for various applications, especially surface protection applications of various articles, and a surface protection film using the polypropylene-based resin film for surface protection with less fish eyes. Background technique [0002] Polypropylene-based unstretched films are widely used as base materials for various packaging materials such as food packaging and surface protection films for the purpose of protecting the surfaces of various articles because of good transparency and low cost. [0003] Furthermore, it is used as a surface protection film for protecting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18B32B27/00B32B27/32C08L23/12C09J7/02
CPCC08K5/005C08L2201/08C08L23/12C09J7/0275C09J2203/306C08L23/16C09J2423/006C08L2205/03C09J7/243
Inventor 江崎浩明西忠嗣
Owner TOYOBO CO LTD
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