Polyamide-based laminated biaxially-stretched film, and vapor-deposited polyamide-based laminated resin film

A polyamide-based, biaxial stretching technology, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc.

Active Publication Date: 2010-09-15
TOYO TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The object of the present invention is to provide a polyamide-based laminated biaxially stretched film and a vapor-deposited polyamide-based laminated resin film, which can solve the problems of the above-mentioned conventional polyamide-based laminated biaxially stretched film, and can be used as a packaging film. The film quality necessary for the film is excellent in oxygen barrier properties, impact resistance and bending fatigue resistance. When used as various packaging materials, it can prevent the deterioration and discoloration of the contents, and can prevent the damage caused by vibration or impact during transportation. The effect of breaking the bag or protecting the quality of the contents of the goods, suitable for packaging purposes

Method used

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  • Polyamide-based laminated biaxially-stretched film, and vapor-deposited polyamide-based laminated resin film
  • Polyamide-based laminated biaxially-stretched film, and vapor-deposited polyamide-based laminated resin film
  • Polyamide-based laminated biaxially-stretched film, and vapor-deposited polyamide-based laminated resin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0282] Next, the present invention will be described in more detail using examples (each experimental example), but the present invention is not limited to the following examples. In addition, evaluation of a film was performed by the following measuring method. First, the measurement method of the characteristics of the substance constituting the adhesion-improving coating coated on the film will be described below. In addition, in the following description, about a mixture, a composition, etc., a part by weight is simply expressed as a part, and % by weight is simply expressed as %.

[0283] [Weight average molecular weight]

[0284] 0.03 g of the polymer was dissolved in 10 ml of tetrahydrofuran, and measured with a GPC-LALLS low-angle light scattering photometer LS-8000 (manufactured by Tosoh Corporation, tetrahydrofuran solvent, reference: polystyrene).

[0285] [Grafting efficiency of polyester]

[0286] Using UNITY 500 (manufactured by Varian Co., Ltd.), 1H-NMR (220 ...

experiment example 1

[0359] Two types of three-layer coextrusion were performed using a T-die device to obtain an unstretched sheet having the following configuration. In the composition of layer B / layer A / layer B, the total thickness of the unstretched sheet is 190 μm, and the ratio of the thickness of each layer to the total thickness is layer B / layer A / layer B=40% / 20% / 40%, the extruded resin temperature of layer A was 270°C, and the extruded resin temperature of layer B was 260°C. Composition constituting layer A: a composition comprising poly-m-phenylene adipamide (manufactured by Mitsubishi Gas Chemical Co., Ltd., RV=2.65)=100% by weight. The composition constituting the B layer: 95% by weight of nylon 6 (manufactured by Toyobo Co., Ltd., RV = 2.8) and 5% by weight of a polyamide-based block copolymer (nylon 12 / polybutylene) as a thermoplastic elastomer Alcohol copolymer, a composition consisting of Pebax 4033 manufactured by Alkema, RV=2.0).

[0360] The obtained unstretched sheet was str...

experiment example 2

[0362] In the description of Experimental Example 1, a biaxially stretched film was obtained in the same manner as in Experimental Example 1 except that it was replaced with the form shown below.

[0363] Composition constituting the B layer: a composition composed of 98% by weight of nylon 6 and 2% by weight of a polyamide-based block copolymer.

[0364]The oxygen transmission rate and the number of pores were measured for the obtained biaxially stretched film. In addition, tests for storage stability and vibration durability were performed on packaging bags produced from the obtained films. These results are shown in Table 1.

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Abstract

Disclosed is a polyamide-based laminated biaxially-stretched film which comprises a resin layer (layer A) mainly composed of a polyamide polymer having a metaxylylene group and a resin layer (layer B) mainly composed of an aliphatic polyamide resin and laminated on at least one surface of the resin layer (layer A), and which has a specific small number of pinholes and a specific oxygen permeability, wherein the polyamide polymer having a metaxylylene group comprises metaxylylene diamine or a mixed xylylene diamine component composed of metaxylylene diamine and paraxylylene diamine as the main diamine component and an alpha, omega-aliphatic dicarboxylic acid having 6 to 12 carbon atoms as the main dicarboxylic acid component.

Description

technical field [0001] The present invention relates to excellent oxygen barrier properties, impact resistance, and bending fatigue resistance, and when used as packaging materials such as food packaging, it has the effect of preventing the deterioration of the contents or protecting the contents from vibration or shock during product transportation, and is suitable for use in Polyamide-based laminated biaxially stretched films and vapor-deposited polyamide-based laminated resin films for various packaging applications. Background technique [0002] Films made of polyamide polymers containing xylylenediamine have been known to have better oxygen barrier properties and heat resistance and stronger film strength than films made of other polymer components. characteristic. [0003] On the other hand, unstretched films or stretched films made of aliphatic polyamides represented by nylon 6 or nylon 66 are widely used as various packaging materials because of their excellent impa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B29C55/12C08G69/26B29K77/00B29L9/00
Inventor 大桥英人宫口义纪稻垣京子松冈干雄小田尚伸野濑克彦
Owner TOYO TOYOBO CO LTD
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