Polypropylene resin composition, molded article produced from the resin composition, and method for production of the molded article

A technology of polypropylene resin and composition, which is applied in the direction of flat products, applications, household appliances, etc., and can solve problems such as poor compatibility, film-forming properties of blends, poor stretching processability, poor forming processability, and difficulty in molding. Increased degree of freedom and excellent moldability

Inactive Publication Date: 2010-12-08
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyglycolic acid has poor compatibility with polypropylene
Therefore, even if polyglycolic acid is blended to improve the gas barrier properties of polypropylene, the blend has poor film-forming properties, stretching processability, and other molding processability, so it is extremely difficult to form a satisfactory molded product. of

Method used

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  • Polypropylene resin composition, molded article produced from the resin composition, and method for production of the molded article
  • Polypropylene resin composition, molded article produced from the resin composition, and method for production of the molded article
  • Polypropylene resin composition, molded article produced from the resin composition, and method for production of the molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0132] Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. The measurement method or evaluation method of physical properties and characteristics is as follows.

[0133] (1) Melt viscosity:

[0134] Melt viscosity of polyglycolic acid was measured using Toyo Seiki Kapirograph 1-C equipped with a capillary (1 mmφ×10 mmL) as a melt viscosity measuring device. More specifically, about 20 g of the sample was placed in a measurement device heated to a temperature (Tm+20°C) higher than the melting point of the polyglycolic acid sample by 20°C, the sample was kept at this temperature for 5 minutes, and then Melt viscosity was measured at 122 / sec. The melt viscosity of polypropylene was measured at a temperature of 240°C and a shear rate of 122 / sec.

[0135] (2) L / W determination of polyglycolic acid dispersed phase:

[0136] From the stretched and heat-set treated film, a glass knife was used to cut perpendic...

Embodiment 1

[0148] In addition to blending 80 parts by mass of polypropylene particles and 20 parts by mass of polyglycolic acid particles, and 6.5 parts by mass of ethylene / glycidyl methacrylate / methyl acrylate copolymer (manufactured by Sumitomo Chemical Co., Ltd.) Bond Factory) was carried out in the same manner as in Comparative Example 2 to produce a biaxially stretched film with a thickness of 3 μm.

[0149] The SEM photograph (magnification = 30,000 times) of the cross-section in the thickness direction of the obtained biaxially stretched film is shown in figure 1 and 2 . Depend on figure 1 and 2 It is clear that in the cross section of the biaxially stretched film in the thickness direction of MD and the cross section of the thickness direction of TD, the form of polyglycolic acid is such that mutually independent multilayer films are dispersed in a state of being laminated with a polypropylene layer interposed therebetween. . SEM photographs (magnification = 30,000 times) of...

Embodiment 2

[0151] Similar to Comparative Example 2 except that 80 parts by mass of polypropylene particles and 20 parts by mass of polyglycolic acid particles were mixed, and 10 parts by mass of maleic anhydride-grafted polypropylene (Modeik, manufactured by Mitsubishi Chemical Co., Ltd.) was used for 100 parts by mass of these resin components. A biaxially stretched film with a thickness of 3 μm was accurately produced.

[0152] Take the SEM photo (magnification=30,000 times) of the section in the thickness direction of the obtained biaxially stretched film, the result shows that, on the section along the thickness direction of MD and the section along the thickness direction of TD, the form of polyglycolic acid is: Independent multilayer films were dispersed in a state of being laminated with a polypropylene layer interposed therebetween.

[0153] SEM photographs (magnification = 30,000 times) of the cross-section in the thickness direction of the melt-extruded sheet before biaxial str...

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Abstract

Disclosed is a polypropylene resin composition which comprises: a resin component comprising 55 to 99 mass% of polypropylene and 1 to 45 mass% of polyglycolic acid; and a reactive compatibilizing agent in an amount of 0.3 to 30 parts by mass relative to 100 parts by mass of the resin component. Also disclosed is a molded article which is produced from the polypropylene resin composition. In the molded article, a dispersion phase composed of polyglycolic acid is present in a matrix composed of polypropylene, wherein polyglycolic acid is dispersed in the matrix in the form of separate thin films. Further disclosed is a method for producing the molded article.

Description

technical field [0001] The present invention relates to a polypropylene resin composition, and more particularly, to a polypropylene resin composition capable of forming a molded article excellent in gas barrier properties. [0002] Furthermore, the present invention relates to a molded article having excellent gas barrier properties formed from the polypropylene resin composition and a method for producing the molded article. Background technique [0003] Polypropylene is a general-purpose resin material excellent in heat resistance, transparency, gloss, moisture resistance, tensile strength, rigidity, water resistance, chemical resistance, surface hardness, etc., and it is used as a packaging material film, container, various parts, etc. for a wide range of uses. [0004] As the non-stretched polypropylene film, a cast polypropylene film (CPP film) obtained by a casting method and an inflated polypropylene film (IPP film) obtained by an inflation method are known. These ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12B29C55/02C08J5/18C08L67/04C08L101/06B29K23/00B29L7/00
CPCC08L51/003C08L101/02B29C55/06C08J2323/10C08J5/18B29K2023/12B29K2023/086B29K2995/006B29K2467/043C08L23/0869C08L67/04C08L23/0884C08L23/10B29C55/12C08L2666/02C08L2666/14
Inventor 佐藤浩幸山根和行穗苅有希来原菜々子野口隆矢
Owner KUREHA KAGAKU KOGYO KK
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