Laminated tube

An aliphatic polyamide, polyamide technology, applied in the direction of pipes, rigid pipes, layered products, etc., can solve problems such as insufficient penetration resistance, and achieve the effects of improved durability, high utilization value, and excellent durability

Active Publication Date: 2016-04-20
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With regard to such strict restrictions, single-layer tubes using polyamide-based resins alone, especially polyamide 11 or polyamide 12, which are excellent in strength, toughness, chemical resistanc

Method used

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  • Laminated tube

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0358] Example 1

[0359] Using the above-mentioned polyamide 12 composition (A-1) and semi-aromatic polyamide composition (B-1), using a Plabor (plastics engineering laboratory Co., Ltd.) two-layer tube forming machine, (A-1 ) Melt (B-1) at an extrusion temperature of 270°C and an extrusion temperature of 300°C, respectively, and merge the discharged molten resin with an adaptor to form a laminated tubular body. Next, it is cooled by a sizing mold with a size control, and then retrieved (引き取り), and the (a) layer (the outermost layer) containing (A-1) and the (b) layer (b) containing (B-1) are obtained. In the case of the innermost layer), the layer structure is (a) / (b)=0.75 / 0.25mm, an inner diameter of 6mm, and an outer diameter of 8mm. Table 1 shows the measurement results of the physical properties of the laminated tube.

Example Embodiment

[0360] Example 2

[0361] In Example 1, except that the polyamide 12 composition (A-1) was changed to (A-2), the same method as in Example 1 was used to obtain a laminated tube having the layer structure shown in Table 1. Table 1 shows the measurement results of the physical properties of the laminated tube.

Example Embodiment

[0362] Example 3

[0363] In Example 1, except that the polyamide 12 composition (A-1) was changed to (A-3), the same method as in Example 1 was used to obtain a laminated tube having the layer structure shown in Table 1. Table 1 shows the measurement results of the physical properties of the laminated tube.

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Abstract

A laminated tube comprising at least two layers and having an (a) layer including an aliphatic polyamide composition (A), and a (b) layer including a semi-aromatic polyamide composition (B) including a specific semi-aromatic polyamide (B1), wherein the aliphatic polyamide composition (A) includes a specific amount of an aliphatic polyamide (A1) and a specific amount of an elastomer polymer (A2) containing an unsaturated compound having a carboxyl group and/or an acid anhydride group, and the product, per 1g of the aliphatic polyamide composition (A), of the concentration [X] of the terminal amino group of the aliphatic polyamide (A1) and the total concentration [Y] of the carboxyl group and acid anhydride group of the elastomer polymer (A2) is a specific amount.

Description

technical field [0001] The present invention relates to a laminated tube. Background technique [0002] In the pipes for automobile piping, in consideration of rusting caused by road antifreeze, global warming prevention, and energy saving, the main raw material is replacing metal with lightweight resin with excellent rust resistance. Generally, resins used for pipes include polyamide resins, saturated polyester resins, polyolefin resins, and thermoplastic polyurethane resins. Single-layer pipes using these resins are superior in heat resistance, Since the chemical resistance and the like are not sufficient, the applicable range is limited. [0003] In addition, automobile piping pipes transport oxygenated gasoline mixed with low-boiling alcohols such as methanol and ethanol, or ethers such as ethyl tert-butyl ether (ETBE), etc. from the viewpoint of saving gasoline consumption and improving performance. . In addition, from the viewpoint of preventing environmental pollut...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B27/34C08L77/00C08L101/06F16L9/12
CPCB32B27/34C08L77/00F16L9/12C08L77/02C08L77/06B32B27/08B32B2250/24B32B2307/202B32B2307/558B32B2307/7265B32B2597/00F16L9/133B32B1/08C08L51/06C08L101/06B32B27/322B32B2605/08
Inventor 中村孝治冈村繁数藤井广昭
Owner UBE IND LTD
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