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 reliability and excellent durability

Active Publication Date: 2017-10-17
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 resistance, and flexibility, have been used so far for the permeability of the above-mentioned chemical solutions. Insufficient preventability, especially for alcohol-containing gasoline permeation prevention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0359] Using the polyamide 12 composition (A-1) and the semi-aromatic polyamide composition (B-1) shown above, the (A-1 ) at an extrusion temperature of 270° C. and (B-1) at an extrusion temperature of 300° C. were melted separately, and the discharged molten resins were combined by an adapter (adapter) to form a laminated tubular body. Next, it is cooled by a sizing die for size control, and then retrieved (引き拍り) to obtain (a) layer (outermost layer) containing (A-1) and (b) layer (b) containing (B-1). In the case of the innermost layer), the layer configuration is (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 physical properties of the laminated tube.

Embodiment 2

[0361] In Example 1, except having changed the polyamide 12 composition (A-1) into (A-2), the laminated tube of the layer structure shown in Table 1 was obtained by the method similar to Example 1. Table 1 shows the measurement results of physical properties of the laminated tube.

Embodiment 3

[0363] In Example 1, except having changed the polyamide 12 composition (A-1) into (A-3), the laminated|multilayer tube of the layer structure shown in Table 1 was obtained by the method similar to Example 1. Table 1 shows the measurement results of physical properties of the laminated tube.

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Abstract

The present invention is a laminated tube having layer (a) comprising an aliphatic polyamide composition (A) and a semiaromatic polyamide composition (B) comprising a specific semiaromatic polyamide (B1) (b) a laminated tube comprising at least two layers, wherein the aliphatic polyamide composition (A) contains a specific amount of aliphatic polyamide (A1), and contains a specific amount of carboxyl groups and / or acid anhydride groups The elastomeric polymer (A2) of an unsaturated compound, in 1 g of the above-mentioned aliphatic polyamide composition (A), the terminal amino group concentration [X] of the above-mentioned aliphatic polyamide (A1), and the above-mentioned elastomeric polymer (A2) The product of the total concentration [Y] of carboxyl groups and acid anhydride groups to have is a specific amount.

Description

technical field [0001] The present invention relates to a laminated pipe. 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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Patent Type & Authority Patents(China)
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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