Multilayer structure

A laminated structure and structure technology, applied to layered products, synthetic resin layered products, and other household appliances, can solve problems such as unusable, adhesive fluctuations, and low adhesiveness of polyamide resin, achieving Excellent durability effect

Active Publication Date: 2009-09-09
UBE IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although it is known that ethylene-vinyl acetate copolymer saponified product (EVOH), poly-m-xylylene adipamide (nylon MXD6) and the like have good bonding strength with nylon 6, but for single-layer Nylon 11 or nylon 12 used in molded products has insufficient adhesive strength, and an adhesive layer needs to be provided between layers, or special surface treatment needs to be implemented between layers
[0007] In addition, regarding other polyester resins and fluorine resins, the adhesiveness to polyamide resins is low, and for example, it has been proposed to use a two-layer mixture of polyester resins, fluorine resins, and polyamide resins that should be bonded. Adhesive resin composition solution, but the adhesiveness is affected by the shape of the adhesive resin composition, and there is a problem that the adhesiveness fluctuates and drops greatly due to extrusion conditions, use environmental conditions, etc.
[0008] In addition, as the adhesive resin, maleic anhydride-modified polyolefin resin and the like are known, but compared with the polyamide resin used, it has the disadvantage of poor heat aging resistance and cannot be used in a severe environment. In addition, the number of layers The increase has caused troubles in cost and management

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Using (A) polyamide 12 resin composition (A-1) and (B) polyamide 9T (B-1) shown above, using Plabor (manufactured by Plastic Engineering Research Institute Co., Ltd.) two-layer tube forming machine, (A) and (B) were melted at an extrusion temperature of 250°C and an extrusion temperature of 330°C respectively, and the jetted molten resins were merged with an adapter to form a laminated tubular body. This is followed by cooling of the sizing die for dimensional control, followed by pulling. When expressed as (a) layer (outer layer) formed of (A) polyamide 12 resin composition, (b) layer (inner layer) formed of (B) polyamide 9T, the layer structure (a) / (b) = 0.75 / 0.25 mm, a laminated tube with an inner diameter of 6 mm and an outer diameter of 8 mm. Table 1 shows the measurement results of the physical properties of the laminated tube.

Embodiment 2

[0150] In Example 1, except that (B) polyamide 9T (B-1) was changed to polyamide 9T (B-2), and (B) was melted at an extrusion temperature of 300°C, the same method as in Example 1 was used. The method for obtaining the laminated tube with the layer structure shown in Table 1. Table 1 shows the measurement results of the physical properties of the laminated tube.

Embodiment 3

[0152] In Example 2, except that (A) polyamide 12 resin composition (A-1) was changed to polyamide 12 resin composition (A-2), the same method as in Example 2 was used to obtain the polyamide 12 resin composition shown in Table 1. Laminated tubes with layer structure. Table 1 shows the measurement results of the physical properties of the laminated tube.

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Abstract

A laminated structure is a laminated structure composed of two or more layers, and includes at least a layer (a) containing (A) aliphatic polyamide and a layer (b) containing (B) semi-aromatic polyamide ) layer, wherein the semi-aromatic polyamide contains 60 mol % or more of diamine units containing aliphatic diamine units having 9 to 13 carbon atoms with respect to all diamine units and 50 mol % with respect to all dicarboxylic acid units The dicarboxylic acid unit of the above terephthalic acid and / or naphthalenedicarboxylic acid unit, and the above-mentioned (b) layer is arranged in the innermost layer. The laminated structure of the present invention has excellent heat resistance, chemical resistance, chemical resistance and / or gas permeability resistance, elution resistance of monomers and oligomers, interlayer adhesion, and durability.

Description

technical field [0001] The present invention relates to laminated structures, especially those excellent in heat resistance, chemical resistance, chemical and / or gas permeability resistance, dissolution resistance of monomers and oligomers, interlayer adhesion, and durability A laminated structure characterized by comprising: a layer containing an aliphatic polyamide; and a layer containing a semi-aromatic polyamide having a specific structure. Background technique [0002] In fuel pipes, hoses, tanks, etc. related to automobiles, from the perspective of rusting caused by road antifreeze and energy saving in recent years, the weight reduction of automobile components has been continuously developed, and the main raw materials have gradually been replaced by metals and resins. . Examples include saturated polyester resins, polyolefin resins, polyamide resins, thermoplastic polyurethane resins, etc. However, when single-layer hoses using these resins are used, due to poor hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/34B32B1/08B65D1/09F16L11/04F16L11/06
CPCB32B27/34F16L11/06B32B1/08F16L11/04B32B2605/08B32B2307/202B32B2597/00B32B27/08
Inventor 西冈群晴久保刚山下隆内田光一
Owner UBE IND LTD
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