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biaxially stretched laminated film

A biaxial stretching and film technology, applied in the direction of layered products, synthetic resin layered products, packaged food, etc.

Active Publication Date: 2020-08-18
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although these biaxially stretched films are excellent in gas barrier properties, bending resistance, transparency, and flexibility, there is still room for improvement in terms of shrinkage during retort processing and impact resistance.

Method used

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  • biaxially stretched laminated film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] Add to a pressure-resistant reaction vessel with an inner volume of 50L equipped with a mixer, a partial condenser, a total condenser, a pressure regulator, a thermometer, a dropping tank, a pump, an aspirator, a nitrogen inlet pipe, a bottom row valve and a wire die Accurately weighed adipic acid 13000g (88.95 moles), sodium hypophosphite 0.3749g (0.0035 moles), sodium acetate 0.1944g (0.0024 moles), after fully carrying out nitrogen replacement, the reaction vessel is airtight, and the reaction vessel is kept at While stirring at 0.4 MPaG, the temperature was raised to 170°C.

[0217] After reaching 170° C., for the molten raw material in the reaction vessel, 12042 g (88.42 moles) of m-xylylenediamine stored in the dropping tank were started to be added dropwise, and the pressure in the reaction vessel was maintained at 0.4 MPaG, and the resulting While removing the condensed water to the outside of the system, the temperature inside the reaction vessel was continuous...

Embodiment 2

[0224] A laminated biaxially stretched film was obtained in the same manner as in Example 1 except that the heat setting temperature was 215° C. and the heat setting time was 10 seconds. The physical properties of the above-mentioned (1) to (8) were evaluated for the obtained biaxially stretched laminated film.

Embodiment 3

[0226] A biaxially stretched laminated film was obtained in the same manner as in Example 1 except that the heat setting time was 10 seconds. The physical properties of the aforementioned (1) to (8) were evaluated for the obtained biaxially stretched laminated film.

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Abstract

The invention provides a double-shaft stretching layer laminated thin film having advantages of gas barrier performance, anti-bending performance, transparent performance, anti-impact performance, and flexible performance, and small contraction rate during cooking. The double-shaft stretching layer laminated thin film comprises a layer (X) adopting aromatic polyamide (A) as main component and a layer (Y) adopting fatty polyamide (B) as main component. The aromatic polyamide (A) comprises more than 70 mol% of a diamine unit of an aromatic diamine unit expressed by the following formula (I) and 50 mol% of a dicarboxylic acid unit of a straight chain fatty dicarboxylic acid unit expressed by the following formula (II)(in the following formula II, m is the integer in a range from 2 to 18). The softening temperature of the layer (Y), which is acquired by the nanometer thermal analysis executed at a temperature rising temperature 1000DEG C / S, is in a range from 200 DEGC to 220 DEG C.

Description

technical field [0001] The present invention relates to a biaxially stretched laminated film, and more specifically, to a biaxially stretched laminated film having good gas barrier properties, bending resistance, transparency, impact resistance and flexibility, a small shrinkage rate during retort treatment, and excellent dimensional stability. Axial stretch laminated film. Background technique [0002] Polyamide-based unstretched films or stretched films are used as films for packaging products such as foods, cosmetics, and pharmaceuticals that avoid deterioration of contents due to oxygen. [0003] For example, Japanese Patent Laid-Open No. 7-276591 (Patent Document 1) describes that at least A laminated film composed of two layers has excellent gas barrier properties, bending resistance, and transparency, and can be used as a film for packaging food, cosmetics, and pharmaceuticals. [0004] In addition, JP-A-2008-80689 (Patent Document 2) and JP-A-2008-94048 (Patent Doc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L77/02C08L51/06C08L53/02B29C69/00B32B27/34B29L7/00B29L9/00
CPCB29C69/00B29L2009/00B32B27/34B32B2250/03B32B2250/05B32B2250/24B32B2307/558B32B2307/7242B32B2307/734B32B2439/70C08J5/18C08J2377/06C08L77/06C08L2203/16C08L2205/02C08L77/02C08L51/06C08L53/02C08L51/08
Inventor 小田尚史佐藤要津中伸幸加藤智则
Owner MITSUBISHI GAS CHEM CO INC