laminated tube

A polyamide and semi-aromatic technology, applied in the field of laminated tubes, can solve the problems of insufficient barrier properties of chemical reagents, and achieve the effect of excellent durability

Active Publication Date: 2022-02-25
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this strict regulation, single-layer pipes obtained by using alone polyamide-based resins, especially polyamide 11 or polyamide 12, which are excellent in strength, toughness, chemical resistance, flexibility, etc. Insufficient barrier properties of reagents, especially the improvement of barrier properties for alcohol-containing gasoline is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0618] Using the polyamide 12 composition (A-1) and the semi-aromatic polyamide composition (B-1) shown above, using a Plabor (manufactured by Plastic Engineering Research Institute Co., Ltd.) two-layer pipe forming machine, the (A- 1) (B-1) was separately melted at an extrusion temperature of 270° C. and an extrusion temperature of 300° C., and the discharged molten resins were merged with a confluencer to form a laminated tubular body. Then, it is cooled and removed by a sizing die for controlling the size, and (a) layer (outermost layer) formed from (A-1) and (b) layer (outermost layer) formed from (B-1) are produced. Inner layer), a laminated tube having a layer structure of (a) / (b)=0.75 / 0.25 mm, an inner diameter of 6.0 mm, and an outer diameter of 8.0 mm was obtained. Table 1 shows the measurement results of physical properties of the laminated tube.

Embodiment 2

[0620] In Example 1, a laminated tube having a layer structure shown in Table 1 was obtained by the same method as in Example 1 except that the polyamide 12 composition (A-1) was changed to (A-2). Table 1 shows the measurement results of physical properties of the laminated tube.

Embodiment 3

[0622] In Example 1, a laminated tube having a layer structure shown in Table 1 was obtained by the same method as in Example 1 except that the polyamide 12 composition (A-1) was changed to (A-3). Table 1 shows the measurement results of physical properties of the laminated tube.

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PUM

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Abstract

Provided is a laminated tube having: a layer comprising a specific aliphatic polyamide composition; and a layer comprising a semi-aromatic polyamide composition containing a semi-aromatic polyamide having a specific structure. A polyamide or a mixture thereof, wherein the two layers are adjacent, wherein the aliphatic polyamide composition comprises: an aliphatic polyamide having a melting point of not more than a specific value and a ratio of the number of methylene groups to the number of amide groups not less than a specific value; and The aliphatic polyamide in which the absolute value of the difference in solubility parameter SP value falls within a specific range, and an elastomer polymer containing a structural unit derived from an unsaturated compound having a carboxyl group and / or an acid anhydride group.

Description

technical field [0001] The present invention relates to laminated tubes. Background technique [0002] For pipes for automobile piping, due to the rust problem caused by road antifreeze, the prevention of global warming, and the demand for energy saving, the main raw material is gradually replaced by metal with excellent rust resistance and light weight resin . Generally, resins used as pipes for piping include polyamide-based resins, saturated polyester-based resins, polyolefin-based resins, and thermoplastic polyurethane-based resins. Since heat resistance, chemical resistance, etc. are insufficient, the applicable range is limited. [0003] In addition, from the point of view of saving gasoline consumption and improving performance, automobile piping pipes are used to transport alcohols with a low boiling point such as methanol and ethanol, or ethers such as ethyl-tert-butyl ether (ETBE). Oxygen gasoline, etc. Furthermore, from the viewpoint of preventing environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B1/08F02M37/00F16L11/04
CPCB32B1/08B32B27/08B32B27/304B32B27/322B32B27/34B32B2250/24B32B2264/0221B32B2270/00B32B2307/714B32B2597/00F02M37/0017F16L11/04B29C48/022B29C48/18B29K2077/00F02M37/0011
Inventor 坪井一俊中村孝治楠本孝明堂山大介
Owner UBE IND LTD
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