Continuous fiber reinforced thermoplastic resin composite material and method for producing same
AssigneeLotte Chemical Corporation
InventorsWon Seock Kim, Jong Wook Lee, You Jung Lee
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Abstract
Disclosed is a scheme whereby a continuous fiber reinforced thermoplastic resin composite material applicable to production of a reinforcing material of various thermoplastic injection products and manufacture of a fiber reinforced thermoplastic plastic part using 3D printing can be produced by a simple method to have an excellent mechanical property. The present invention provides a continuous fiber reinforced thermoplastic composite material in which a plurality of yarns or tape intermediate materials are combined together to form a rod shape, and a method for producing the same.
Claims13
A method for producing a continuous fiber reinforced thermoplastic resin composite material, the method comprising the steps of:
- (a) continuously introducing a plurality of yarn intermediate materials having a diameter of 1-3 mm into a heating unit;
- (b) heating the intermediate materials to a temperature equal to or higher than the melting point of a thermoplastic resin contained in the intermediate materials to melt at least a portion of the thermoplastic resin on the surface of the intermediate material;
- and
- (c) passing at least two of the molten intermediate materials through a nozzle to be combined together to form a rod shape,
- wherein the composite material has a porosity of 1-10 vol %, and
- wherein the composite material satisfies Expression 1 below on the basis of the cross-section of the composite material:
- 0.2 mm−1≤P/A≤5 mm−1 [Expression 1]
- wherein, in Expression 1, P and A are a cross-sectional circumference length and a cross-sectional area of the composite material, respectively.
A method for producing a continuous fiber reinforced thermoplastic resin composite material, the method comprising the steps of:
- (a) continuously introducing a plurality of yarn intermediate materials having a diameter of 1-3 mm into a heating unit;
- (b) heating the intermediate materials to a temperature equal to or higher than the melting point of a thermoplastic resin contained in the intermediate materials to melt at least a portion of the thermoplastic resin on the surface of the intermediate material;
- and
- (c) passing at least two of the molten intermediate materials through a nozzle having an inlet end and an outlet end and wherein the nozzle has a diameter ratio of the inlet end to the diameter of the outlet end of 1.5-5 and a length ratio of the outlet end to the diameter of the outlet end of 2-10, to be combined together to form a rod shape to produce a continuous fiber reinforced thermoplastic resin composite material,
- wherein the composite material has a porosity of 1-10 vol % and satisfies Expression 1 below on the basis of the cross-section of the composite material:
- 0.2 mm−1≤P/A≤5 mm−1 [Expression 1]
- wherein, in Expression 1, P and A are a cross-sectional circumference length and a cross-sectional area of the composite material, respectively.
Dependencies are inferred from the claim text.