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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/142808
Kind Code:
The present invention provides a multilayer tube having excellent low temperature impact resistance, breakage pressure strength at high temperatures, flexibility, dimensional stability, and elution resistance of low molecular weight substances and ion components. The multilayer tube according to the present invention has: a layer comprising an aliphatic polyamide composition containing an elastomer polymer that contains a constituent unit derived from an unsaturated compound having a carboxyl group and/or an acid anhydride group and an aliphatic polyamide having a ratio of a number of methylene groups to a number of amide groups in a prescribed range, the aliphatic polyamide composition having a flexural modulus of elasticity that is within a specific range by containing, as necessary, a plasticizer having a specific structure; and a layer containing a modified polyolefin having a specific melting point or higher. The thickness of the layer comprising the aliphatic polyamide composition is a specific ratio or higher with respect to the total wall thickness of the tube.

TSUBOI Kazutoshi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7758633, JP)
SASAKI Riyousuke (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7758633, JP)
FUKUDA Riyuu (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7758633, JP)
NAKAMURA Koji (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7758633, JP)
Application Number:
Publication Date:
July 25, 2019
Filing Date:
January 16, 2019
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UBE INDUSTRIES, LTD. (1978-96, Oaza Kogushi Ube-sh, Yamaguchi 33, 〒7758633, JP)
International Classes:
F16L11/04; B32B1/08; B32B27/22; B32B27/32
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
AKATSUKA Masaki et al. (Kurihashi Bldg. 6F, 1-63 Daimon-cho Omiya-ku, Saitama-sh, Saitama 46, 〒3300846, JP)
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