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Title:
TUBULAR MULTILAYERED BLOW MOLDED PRODUCT AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPH09239817
Kind Code:
A
Abstract:

To prevent the damage or abrasion of a bent tubular molded product at an attaching region by providing a part where the wall thickness ratio of the inner and outer layers of a pipe wall is changed along a longitudinal direction and differentiating the kind of the resin forming the inner layer from that of at least one of the resins of two demarcated regions forming the outermost layer.

A tubular multilayered blow molded product 6 has two demarcated regions partitioned by the boundary line 4 parallel to the outermost layer in the longitudinal direction thereof so that the setting of a resin A becomes the upper half surface of the molded product and the section of a resin B becomes the rear surface thereof. The A-resin layer on the upper half surface side is composed of a polyamide 6 resin good in glossiness and the B-resin layer on the lower half surface side of an outer layer is composed of a glass fiber reinforced polyamide layer excellent in rigidity and heat resistance. The resin C of an inner layer is composed of a polyamide 11 resin having adhesiveness to these polyamide resins, having high flexibility and strong against hydrolysis. The wall thickness ratio of the soft resin layer C arranged inside the inner layer is made high at a part where the wall thickness ratio of the inner and outer layers of a pipe wall is changed along the longitudinal direction to impart flexibility.


Inventors:
OTA AKIRA
Application Number:
JP1996000046388
Publication Date:
September 16, 1997
Filing Date:
March 04, 1996
Export Citation:
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Assignee:
NIPPON STEEL CHEMICAL CO
NIPPON STEEL CORP
International Classes:
B29B11/10; B29C49/00; B29C49/04; B29C49/22; B29L9/00; B29L23/00; (IPC1-7): B29C49/22; B29B11/10; B29C49/04
Attorney, Agent or Firm:
藤本 博光 (外1名)