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Polypropylene resin composition and molded articles, sheet or container therefrom

A technology of polypropylene resin and propylene polymer, applied in containers, rigid containers, applications, etc., can solve the problems of inability to obtain heat resistance, achieve excellent transparency, excellent heat resistance, and inhibit the occurrence of whitening

Active Publication Date: 2009-03-25
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that sufficient heat resistance cannot be obtained

Method used

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  • Polypropylene resin composition and molded articles, sheet or container therefrom
  • Polypropylene resin composition and molded articles, sheet or container therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107]

[0108] Using a Henschel mixer, the propylene polymer (A) and the propylene-1-butene random copolymer (B) were dry-blended according to the compounding amounts described in Table 1, and the obtained polypropylene resin composition was prepared with T -The extruder of the die was formed into a film at an extrusion temperature of 210° C. and a chill roll temperature of 30° C. to obtain a sheet having a thickness of 0.6 mm.

[0109]

[0110] Using a vacuum forming machine with a cup-shaped metal mold with a diameter of 80mm and a depth of 40mm, under the conditions of a preheating heater temperature of 250°C, a preheating time of 15 seconds, a mold temperature of 20°C, and a holding time in the mold of 10 seconds, use The sheet obtained above was subjected to vacuum forming.

[0111] As heat resistance, the evaluation results of deflection temperature under load measured with a test piece, formability of the sheet, haze of the sheet, vacuum formability (softened state...

Embodiment 2、3

[0114] [Example 2, 3, Comparative Example 1]

[0115] A sheet was obtained in the same manner as in Example 1 except that the compounding ratio of the propylene polymer (A) and the propylene / 1-butene random copolymer (B) was the composition described in Table 1.

[0116] Next, vacuum forming and bending were performed using the obtained sheet.

[0117] Physical properties were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Embodiment 4

[0119] Except having used (A2) as a propylene polymer (A), it carried out similarly to Example 1, and obtained the sheet.

[0120] Next, vacuum forming and bending were performed using the obtained sheet.

[0121] Physical properties were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

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Abstract

An object of the present invention is to provide a propylene resin composition capable of providing a thermoformed container excellent in heat resistance, moldability, appearance and shape, and a molded article obtained by bending processing a polypropylene resin composition excellent in heat resistance and shape retention property in bending processing. An object of the present invention is to provide a polypropylene resin composition comprising 50 to 99% by weight of a propylene polymer (A) having a meting point (Tm) in the range of 140 to 170 DEG C. as measured by a differential scanning calorimeter and 1 to 50% by weight of a propylene / alpha-olefin copolymer (B) having a melting point (Tm) of 100 DEG C. or less or having no observed melting point, a molded article and a sheet obtained therefrom, and a container obtained by thermoforming the sheet.

Description

technical field [0001] The present invention relates to a polypropylene resin composition, particularly a resin composition capable of obtaining a molded article with good appearance and shape, and a sheet and container obtained from the resin composition. Background technique [0002] Crystalline polypropylene has excellent mechanical properties such as tensile strength, rigidity, surface hardness, impact strength, and cold resistance, optical properties such as gloss and transparency, and food hygiene properties such as non-toxicity and odorlessness. It is widely used in the field of food packaging. [0003] The above-mentioned crystalline polypropylene is bent and molded and used as various moldings, or molded into a sheet shape, heated to soften it, and then molded into a container shape, that is, thermoformed into a cup shape or a disk shape. For example, it is widely used as Containers for food packaging. [0004] Containers obtained from the above-mentioned crystall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10B65D1/00
CPCC08J2323/10C08J5/18Y10T428/1352C08L2205/02C08L23/142C08L23/10C08L23/12C08L2666/06B29D7/01B65D1/00C08L2203/30
Inventor 井上则英黑木孝行
Owner MITSUI CHEM INC
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