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Easily-torn film, multilayer film, packaging material, and container

An easy-to-tear, multi-layer film technology, applied in rigid containers, packaging, containers, etc., can solve the problems of unsealing and leakage of packaging materials, and achieve high oxygen barrier properties, low elastic modulus, and excellent linear cutting properties. Effect

Active Publication Date: 2020-04-10
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the packaging material obtained by laminating the above-mentioned plastic films may not be torn in a straight line to be opened, and when opened obliquely, the content may leak when it is in a liquid state.

Method used

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  • Easily-torn film, multilayer film, packaging material, and container
  • Easily-torn film, multilayer film, packaging material, and container
  • Easily-torn film, multilayer film, packaging material, and container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0184] used by Film extruder consisting of single screw extruder, filter head equipped with 600-mesh filter, and T-die; take-up device with cooling roll, coiler, etc., for the manufacture of easy-to-tear film.

[0185] The extruder was set at 280°C, the T die was set at 285°C, 30% by mass of polyamide A6 and 70% by mass of polyamide B2 were dry-blended, and then put into the extruder, and the screw speed was set to Set at 15 rpm, the polyamide resin composition was extruded into a film within a residence time of 5 minutes, and the take-up speed was adjusted to obtain an unstretched film with a width of 15 cm and a thickness of 180 μm.

[0186] The obtained unstretched film was stretched 3.0 times along the longitudinal axis and stretched 3.0 times along the horizontal axis in a clamp-type simultaneous biaxial stretching machine at a preheating blowing temperature of 90°C and a preheating furnace body temperature of 95°C for 10 seconds. It was stretched 3.0 times in one direc...

Embodiment 2～9、 comparative example 1～3 and 5～7

[0197] In Example 1, except having changed the kind and compounding quantity (mass ratio in a table|surface) of polyamide A and polyamide B as shown in Table 1 or Table 2, it carried out similarly.

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Abstract

The present invention provides an easily-torn film that has excellent straight-line cutability, high oxygen barrier properties, and a low modulus of elasticity; a multilayer film; a packaging material; and a container. An easily-torn film that includes a polyamide resin component that comprises: more than 20 parts by mass but no more than 70 parts by mass of a semi-aromatic polyamide resin A; andat least 30 parts by mass but less than 80 parts by mass of an aliphatic polyamide resin B. The semi-aromatic polyamide resin A is configured from diamine-derived structural units and dicarboxylic-acid-derived structural units. At least 60 mol% of the diamine-derived structural units are derived from meta xylene diamine, and at least 60 mol% of the dicarboxylic-acid-derived structural units are derived from C4-10 [alpha],[ Omega]-straight-chain aliphatic dicarboxylic acids. The molar concentration of phosphorous atoms, the total molar concentration of alkali metal atoms, and the total molar concentration of alkali earth metal atoms in the semi-aromatic polyamide resin satisfy a prescribed relationship with Mn.

Description

technical field [0001] The present invention relates to a tearable film, and a multilayer film, packaging material and container using the aforementioned tearable film. Background technique [0002] In order to prevent deterioration of foods, medicines, etc. and store them for a long period of time, an operation is carried out in which a packaging material excellent in gas barrier properties is used for packaging of foodstuffs and the like. In addition, plastic films are often used as materials for packaging foods and the like, but plastic films used as packaging materials alone often have insufficient gas barrier properties. Therefore, plastic films for packaging materials are produced by laminating plastic films having gas barrier properties to produce packaging materials. [0003] However, a packaging material obtained by laminating the above-mentioned plastic films may not be torn in a straight line to be opened, and may leak when the contents are in a liquid state when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00B32B27/36B65D65/40B32B27/34C08G69/26C08J5/18C08L77/06B29C48/305B29C55/12B32B27/32B29L7/00B29K77/00
CPCB65D65/40C08G69/26C08J5/18C08L77/00C08L77/06B29K2077/00B29C48/08B29L2031/712B29C48/21B29C48/397B29C48/625B29C55/16B32B1/00B32B2439/60B32B2307/54B32B27/18B32B27/36B32B2439/70B32B2307/732B32B27/34B32B2307/582B32B2250/24B32B2439/00B32B2255/10B32B7/12B32B27/32B32B27/20B32B27/08B32B2250/03B32B2439/40B32B2439/80C08L2205/03
Inventor 大塚浩介小田尚史
Owner MITSUBISHI GAS CHEM CO INC
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