Structural material and process for its production
First Claim
1. A molded article consisting of a polyamide resin reinforced by a reinforcing material which is one selected from the group consisting of continuous fiber and filament having a length of at least 1 mm, said molded article being obtained by a monomer casting method comprising the steps of:
- (1) treating said reinforcing material with an agent for improving the adhesion between said reinforcing material and said polyamide resin, wherein said agent is soluble in alcohol or water or in both alcohol and water;
(2) arranging said treated reinforcing material in a desired shape;
(3) placing the thus arranged reinforcing material in a mold;
(4) pouring a molten ω
-lactam composition containing a polymerization catalyst and an initiator into said mold; and
(5) heating the molten ω
-lactam composition to obtain a polyamide resin, thereby forming said molded article.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a structural material excelling in lightness of weight, strength, flexural modulus and other properties, being made from polyamide resin reinforced with continuous fiber and/or long filament reinforcing material. This structural material can be fabricated by a monomer casting method by arranging said fiber reinforcing material preliminarily in a desired shape, putting it into a mold, pouring molten ω-lactams containing a polymerization catalyst and an initiator into said mold, and heating to obtain polyamide resin.
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Citations
20 Claims
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1. A molded article consisting of a polyamide resin reinforced by a reinforcing material which is one selected from the group consisting of continuous fiber and filament having a length of at least 1 mm, said molded article being obtained by a monomer casting method comprising the steps of:
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(1) treating said reinforcing material with an agent for improving the adhesion between said reinforcing material and said polyamide resin, wherein said agent is soluble in alcohol or water or in both alcohol and water;
(2) arranging said treated reinforcing material in a desired shape;
(3) placing the thus arranged reinforcing material in a mold;
(4) pouring a molten ω
-lactam composition containing a polymerization catalyst and an initiator into said mold; and
(5) heating the molten ω
-lactam composition to obtain a polyamide resin, thereby forming said molded article.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification