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

An easy-to-tear, multi-layer film technology, applied in the direction of rigid containers, packaging, containers, etc., can solve the problems of packaging materials such as unsealing and leakage, and achieve the effect of excellent linear cutting performance

Pending 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
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Effect test

Embodiment

[0139] Examples are given below to describe the present invention more specifically. Materials, usage-amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed as long as they do not deviate from the spirit of the present invention. Therefore, the scope of protection of the present invention is not limited to the specific examples shown below.

[0140]

[0141] >

[0142] Add 7.8 g of sodium hypophosphite monohydrate and 4.0 g of sodium acetate to 8.9 kg of adipic acid, heat and melt at 170°C under 0.1 MPaA in the reaction tank, and slowly add it dropwise over 2 hours while stirring the contents m-xylylenediamine 8.2kg, the temperature was raised to 250°C. After the temperature was raised, the pressure was gradually lowered to 0.08 MPaA over 1 hour, and maintained for 0.5 hours. After completion of the reaction, the contents were taken out in the form of strands, pelletized with a pelletizer, and...

Embodiment 1

[0182] In Example 1, it carried out similarly except having changed the kind and compounding quantity of polyamide A and polyamide B, and the residence time in a molding machine as shown in Table 1 or Table 2.

Embodiment 3

[0183] Regarding Example 3, the sample obtained by cutting the TD cross-section of the unstretched film by ion milling is described in Figure 5 (a). Figure 5 (b) for identifying Figure 5 Image of a region derived from polyamide A in panel (a).

[0184]

[0185] In Example 1, the types and compounding amounts of polyamide A and polyamide B were changed as shown in Table 2, the extruder was set at 290°C, and the temperature of the mold was set at the temperature shown in Table 1, except Otherwise, it is performed in the same manner.

[0186] The sample obtained by cutting the TD cross-section of the unstretched film by ion milling is described in Image 6 (a). Image 6 (b) for identifying Image 6 Image of a region derived from polyamide A in (a).

[0187]

[0188] In Example 1, the types and compounding amounts of polyamide A and polyamide B were changed as shown in Table 2, and the molding method of the easily tearable film was changed as follows, except for the s...

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Abstract

Provided are: an easily-torn film that has excellent straight-line cutability; a multilayer film; a packaging material; and a container. An easily-torn film that comprises a drawn polyamide resin filmthat 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; and at 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 alfa, Omega -straight-chain aliphatic dicarboxylic acids. When a TD-direction cross-section of the polyamide resin film has undergone planar ion milling, the area fraction that corresponds to the semi-aromatic polyamide resin A as observed by secondary electron image observation is at least 9.8%.

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): C08J5/18B32B27/00B32B27/32B32B27/34B32B27/36
CPCB32B27/34C08J5/18B32B27/08B32B2307/582C08J2477/06C08J2377/06C08J2377/02B32B2439/60B32B27/18B32B27/36B32B2439/70B32B2307/732B32B27/22B32B2250/24B32B2439/00B32B2255/10B32B7/12B32B27/32B32B27/20B32B2250/03B32B2307/7242B32B2439/40B32B2439/80C08L77/02C08L77/06C08L2203/16C08L2205/025
Inventor 大塚浩介佐藤要小田尚史
Owner MITSUBISHI GAS CHEM CO INC
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