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Laminated stretched polyamide film

A polyamide film, polyamide technology, applied in the direction of layered products, synthetic resin layered products, packaged food, etc., can solve problems such as low cost, achieve economical, omit the coating process, and have good productivity.

Active Publication Date: 2021-10-29
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The object of the present invention is to solve the above-mentioned problems of conventional biaxially stretched polyamide films, and to provide a biaxially stretched polyamide film excellent in adhesive strength, especially water-resistant lamination strength, at low cost

Method used

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  • Laminated stretched polyamide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Using a device consisting of 1 caliber 60mm extruder for A layer and 2 caliber 25mm extruders for B and C layers and a 380mm wide co-extrusion T-die, the following materials are melt extruded: As the substrate layer (layer A), polyamide 6 (relative viscosity 2.8, melting point 220°C); as the easy-adhesive layer (layer B), polyamide 6 (relative viscosity 2.8, melting point 220°C) and polyamide 6 / 66 copolymer (the proportion of polyamide 66 is 7% by mass, the relative viscosity is 2.8, and the melting point is 198°C) is blended at a mass ratio of 9 / 91 and contains 0.54% by mass of silica fine particles, 0.15% by mass of ethylene A substance obtained by adding a base distearic acid amide; as an easy-slip layer (C layer), polyamide 6 (relative viscosity 2.8, melting point 220°C) contains 0.54% by mass of silica fine particles, 0.15% by mass % of ethylene bis stearic acid amide is added, and the feed block is laminated in the composition of easy-adhesive layer (B layer) / sub...

Embodiment 2

[0128] A laminated biaxially stretched polyamide film was produced in the same manner as in Example 1 except for the following, except that as the substrate layer (layer A), polyamide 6 and polyamide 6 / 66 copolymer were used as The mass ratio is 70 / 30 and melt-extruded. As the easy-bonding layer (layer B), polyamide 6 and polyamide 6 / 66 copolymer are blended in a mass ratio of 15 / 85, and will contain 0.03 The material obtained by adding silica particles (pore volume 0.8ml / g, average particle diameter 2.7μm) in mass % was melt-extruded, and as the slippery layer (layer C), polyamide 6 and MXD were mixed by weight The ratio is 95 / 5 compounded and melt extruded.

Embodiment 3

[0130]A laminated biaxially stretched polyamide film was produced in the same manner as in Example 1 except for the following, except that as the substrate layer (layer A), polyamide 6 and polyamide 6 / 66 copolymer were used as The ratio of mass ratio 95 / 5 is matched and melt-extruded, as the easy-bonding layer (B layer), polyamide 6 and polyamide 6 / 66 copolymer are melt-extruded with 30 / 70 mass ratio, as the easy-slip layer ( Layer C), polyamide 6 and MXD were blended and melt-extruded in a ratio of 95 / 5 by weight.

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Abstract

Provided is a laminated stretched polyamide film excelling in water-resistant adhesiveness (water-resistant laminate strength), impact resistance, and pinhole resistance. The laminated stretched polyamide film is configured with three layers including a readily adhering layer (layer B), a substrate layer (layer A), and a slippery layer (layer C) in that order. The laminated stretched polyamide film is characterized in that the layer A contains 65 mass% or more of a polyamide 6; the layer B contains: 60-100 mass% of a polyamide 6 copolymer in which a ratio of copolymerization components in the copolymer is 3-35 mass%; and 0-40 mass% of the polyamide 6; and the layer C contains 70 mass% or more of the polyamide 6 and 0.05-1 mass% of microparticles having an average particle diameter of 0.1-10 mum.

Description

technical field [0001] The present invention relates to a biaxially stretched polyamide film excellent in adhesiveness. In particular, it relates to a biaxially stretched polyamide film excellent in water-resistant adhesive strength with a sealing film. Background technique [0002] Since biaxially stretched polyamide films are excellent in tensile strength, flexural strength, pinhole resistance, oil resistance, oxygen barrier properties, etc., they are used as packaging materials, especially food packaging materials. [0003] Regarding biaxially stretched polyamide films, heat-sealable polyolefin films (also called sealing films) such as polyethylene and polypropylene are usually laminated (also called laminated), heat-sealed to form the edge of the bag and used as a packaging bag Wait for use. Biaxially oriented polyamide films are widely used as food packaging materials. [0004] However, when a laminated film of a biaxially stretched polyamide film and a sealing film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34
CPCB32B27/34B32B2307/746B32B7/12B32B2250/24B32B2307/518B32B27/16B32B2307/7265B32B2307/306B32B27/18B32B2307/5825B32B2264/1021B32B2307/546B32B2307/734B32B2307/7244B32B2250/03B32B2307/732B32B2439/70B32B2270/00B32B2307/748B32B2439/46B32B2264/303B32B2307/558B32B27/08B32B2250/40B32B2264/02B32B2307/30B32B2307/308B32B2307/54B32B2307/581B32B2307/514B32B27/20
Inventor 远藤卓郎滨贡介
Owner TOYOBO CO LTD
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