Laminated stretched polyamide film

A polyamide film, polyamide technology, applied in the direction of lamination, layered products, lamination devices, etc., can solve the problem of film impact resistance, poor pinhole resistance, weak bonding strength, lamination strength, lamination Strength reduction and other problems, to achieve the effect of strong water-resistant lamination strength, good productivity, and economical productivity

Active Publication Date: 2022-05-06
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when a laminated film of a biaxially stretched polyamide film and a sealing film is used for a liquid soup bag or a bag for hydrated substances, the adhesive strength between the laminated films (also referred to as lamination strength) ) Weakness, the problem of film peeling after lamination
In particular, there is a disadvantage that after hot water treatment at a high temperature such as retort, water penetrates between the laminated films, and the lamination strength between the biaxially stretched polyamide film and the sealing film is extremely reduced.
However, in this case, there is a problem that the impact resistance and pinhole resistance of the film are deteriorated.

Method used

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  • Laminated stretched polyamide film
  • Laminated stretched polyamide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] A device comprising 1 caliber 60mm extruder for A layer, 2 caliber 25mm extruders for B layer and C layer, and a co-extrusion T-die with a width of 380mm was used as the substrate layer (A layer ), polyamide 6 (relative viscosity 2.8, melting point 220° C.) and polyamide 6 / 66 copolymer (the ratio of polyamide 66 is 25 mass %, relative viscosity 2.8, melting point 198° C. ) is melt-extruded, and as an easy-bonding layer (layer B), polyamide 6 (relative viscosity 2.8, melting point 220°C) and polyamide 6 / 66 copolymer ( The ratio of polyamide 66 is 25% by mass, the relative viscosity is 2.8, and the melting point is 198°C), and silicon dioxide fine particles are added to contain 0.54% by mass, and ethylene bis stearic acid amide is added to contain 0.15% by mass. As an easy-slip layer (C layer), polyamide 6 (relative viscosity 2.8, melting point 220°C) and polyamide MXD6 are blended at a mass ratio of 95 / 5 and silica particles are added to contain 0.54% by mass. Ethylene ...

Embodiment 2～6

[0159] In addition to the film forming method of Example 1 above, except that the resin ratio of each layer and the film forming conditions were changed to the conditions shown in Table 1, a laminated biaxially oriented polyamide was produced in the same manner as in Example 1. membrane.

Embodiment 7

[0161] Laminated biaxially stretched poly Amide film.

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Abstract

Provided is a layered stretched polyamide film which is a biaxially stretched film comprising three layers including a polyamide resin composition in the order of a highly adhesive layer (layer B), a base layer (layer A), and a highly slippery layer (layer C), and which is characterized by satisfying (1)-(4), and which is also characterized in that the layered stretched polyamide film is a biaxially stretched film comprising three layers including the polyamide resin composition in the order of the highly adhesive layer (layer B), the base layer (layer A), and the highly slippery layer (layer C). (1) The A layer contains 50-90 mass% of polyamide 6 and 10-50 mass% of a polyamide 6 copolymer in which the ratio of a copolymer component in the copolymer is 3-35 mass%, and (2) the B layer contains 60-100 mass% of a polyamide 6 copolymer in which the ratio of a copolymer component in the copolymer is 3-35 mass% and 0-40 mass% of polyamide 6. (3) the C layer contains 70 mass% or more of polyamide 6 and 0.05-1 mass% of fine particles having an average particle diameter of 0.1-10 [mu] m, (4) the tensile breaking strengths in the MD direction and the TD direction are 150 MPa or more, and (5) the laminate strength is 3.3 N / 15 mm or more.

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] Biaxially oriented polyamide films are used as packaging materials, especially food packaging materials, due to their excellent tensile strength, flexural strength, pinhole resistance, oil resistance, oxygen barrier properties, and the like. [0003] Biaxially stretched polyamide film is usually made by laminating (also called lamination) heat-sealable polyolefin films (also called sealing film) such as polyethylene and polypropylene, and heat-sealing the edge of the bag. Used in packaging bags, etc. 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 is used for a liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/20B32B27/34B32B27/06B29C55/12B65D65/40
CPCB32B27/20B32B27/34B32B27/08B29C55/12B65D65/40B29K2077/00B29L2007/00B29L2009/00B29C55/14B29C55/16B32B7/12B32B2250/24B32B2307/746B32B2307/518B32B2307/306B32B2264/1021B32B2307/56B32B2307/54B32B2250/03B32B2307/732B32B2439/70B29C55/023B29C48/022B29C48/21B29C48/0018B32B2264/303B29C55/005B29C55/143B29L2007/002B32B37/153B32B38/0012B32B2038/0028B32B2307/558B32B2307/581B32B2307/7265B32B2439/46B32B2553/00
Inventor 后藤考道远藤卓郎
Owner TOYOBO CO LTD
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