Method for producing cut bodies and method for cutting fiber-reinforced resin
AssigneeTeijin Limited
InventorsMakoto Ootsubo, Hiroya Hada, Toshiki Maeda, Takuo Kanzaki
Life of this patent
Estimating the term…
Abstract
According to an aspect of the present invention, there is provided a method for producing cut bodies including: cutting a fiber-reinforced resin material, the fiber-reinforced resin material including reinforcing fibers and a thermoplastic resin, the reinforcing fibers having a tensile strength of 1,000 MPa to 6,000 MPa; and heating the fiber-reinforced resin material, wherein a flexural modulus of the fiber-reinforced resin material at the cutting is decreased to a value ranging from 80% to 15% of the flexural modulus of the fiber-reinforced resin material before heating.
Claims8
A method for producing cut bodies of a fiber-reinforced resin material, the material including reinforcing fibers having a tensile strength of 1,000 MPa to 6,000 MPa and a thermoplastic resin, the method comprising:
- decreasing a flexural modulus of the fiber-reinforced resin material to a value ranging from 80% to 15% of the flexural modulus of the fiber-reinforced resin material before heating by heating the fiber-reinforced resin material to a temperature ranging from 150° C. lower than a melting point of the thermoplastic resin to 50° C. lower than the melting point of the thermoplastic resin when the thermoplastic resin is a crystalline resin, or to a temperature ranging from 50° C. lower than a glass transition point of the thermoplastic resin to 50° C. higher than the glass transition point of the thermoplastic resin when the thermoplastic resin is an amorphous resin;
- and
- cutting the heated fiber-reinforced resin material having the decreased flexural modulus to produce the cut bodies;
- wherein the reinforcing fibers are carbon fibers, have an average fiber length of 1 mm to 100 mm, and are randomly oriented in in-plane directions of the fiber-reinforced resin material.
A method for cutting a fiber-reinforced resin material, the material including reinforcing fibers having a tensile strength of 1,000 MPa to 6,000 MPa and a thermoplastic resin, the method comprising:
- decreasing a flexural modulus of the fiber-reinforced resin material to a value ranging from 80% to 15% of the flexural modulus of the fiber-reinforced resin material before heating by heating the fiber-reinforced resin material to a temperature ranging from 150° C. lower than a melting point of the thermoplastic resin to 50° C. lower than the melting point of the thermoplastic resin when the thermoplastic resin is a crystalline resin, or to a temperature ranging from 50° C. lower than a glass transition point of the thermoplastic resin to 50° C. higher than the glass transition point of the thermoplastic resin when the thermoplastic resin is an amorphous resin;
- and
- cutting the heated fiber-reinforced resin material having the decreased flexural modulus to form a cut body;
- wherein the reinforcing fibers are carbon fibers, have an average fiber length of 1 mm to 100 mm, and are randomly oriented in in-plane directions of the fiber-reinforced resin material.
Dependencies are inferred from the claim text.