Molded article from thermoplastic composite material and method for producing the same
First Claim
1. A method of producing a molded article of a thermoplastic composite material comprisingextruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler, wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled, and wherein a coating layer composed of a resin material containing a thermoplastic resin is formed on the surface of a core layer obtainable by extrusion of the thermoplastic composite material.
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Abstract
The present invention has for its object to provide a molded article of a thermoplastic composite material which is not only durable with little discoloration or fading even on prolonged outdoor exposure and is very satisfactory in physical properties and appearance qualities inclusive of wood-like texture but also has high productivity and good economics.
The present invention is a method of producing a molded article of a thermoplastic composite material comprising extruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler, wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled.
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Citations
19 Claims
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1. A method of producing a molded article of a thermoplastic composite material comprising
extruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler, wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled, and wherein a coating layer composed of a resin material containing a thermoplastic resin is formed on the surface of a core layer obtainable by extrusion of the thermoplastic composite material.
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14. A method of producing a molded article of a thermoplastic composite material comprising
extruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler, wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled, and wherein the extrusion apparatus comprises the extruder, the hot shaping die, the cooling die, a surface heating die, and a hot coating die as serially arranged in this order, said hot shaping die and cooling die and said surface heating die and hot coating die being directly coupled respectively.
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18. A method of producing a molded article of a thermoplastic resin material comprising
extruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler, wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled, and wherein primary cooling at 150 to 180° - C. is followed by secondary cooling at 60 to 140°
C. in the cooling die.
- C. is followed by secondary cooling at 60 to 140°
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19. The method of producing a molded article of a thermoplastic resin material comprising
extruding the thermoplastic composite material containing a thermoplastic resin and a vegetable filler, said vegetable filler content being 50 to 90 weight % of the total weight of said thermoplastic resin and said vegetable filler. wherein extrusion is carried out by means of an extrusion apparatus comprising at least an extruder, a hot shaping die, and a cooling die, said hot shaping die and cooling die being directly coupled, and wherein the extruder is a counterrotating twin-screw extruder and wherein the temperature of the thermoplastic composite material at the outlet of said counterrotating twin-screw extruder is controlled within the range of (melting point − - 15°
C.) to (melting point +10°
C.) of the thermoplastic resin contained in the thermoplastic composite material.
- 15°
Specification