Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin composition molding which can be molded in a short time, namely, with favorable productivity, and has heat resistance and mechanical characteristics equivalent or superior to those of a conventional thermoplastic resin without being subjected to heat treatment (annealing). SOLUTION: A resin composition 8 is injected into the cavity 6 of a mold 1 the temperature of which is set properly and then the resin composition 8 is crystallized in the mold, to mold it into the resin composition molding 9. After the molding, a movable mold 3 is moved to open the mold 1. The molding 9 is taken by the movable mold 3. Next, gas is ejected by the use of an air gun nozzle 10 to a part corresponding to an ejector pin of a surface 11 exposed to the fixed mold 2 side of the molding 9 taken by the movable mold 3 to cool the part. After the cooling, the molding 9 is ejected by the ejector pin 5 and is taken out of the movable mold 3. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of the flooring wherein the difference between heat dimensional stability in a take-up direction and the heat dimensional stability in a base width direction is reduced, and the flooring manufactured by this method. SOLUTION: The dimension L2, in the width direction, of an outlet 14 for a sizing 10, is larger than the dimension L1, in the width direction, of an inlet 12 for the sizing 10. A continuous change from the dimension L1, in the width direction, of the inlet 12 to the dimension L2, in the width direction, of the outlet 14, is designed. Consequently, the resin flow in the sizing 10 occurs in the width direction in addition to the resin flow in the take-up direction. Thus it is possible to control the orientation of a woody filler in the take-up direction and thereby, improve the heat dimensional stability, in the width direction, of the floor base. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To produce a woody packing resin panel with excellent dimensional accuracy guaranteed which can make a surface smooth enough in spite of quenching when a woody packing resin gel obtained by melting a thermoplastic resin by frictional heat generated by the high speed agitation of the thermoplastic resin and a woody filler is arranged in the cooling mold of a press and compressed, spread, and cooled to produce a square panel having lattice-like ribs on the backside of a roof part. SOLUTION: The woody packing resin gel B is arranged in the mold C1 to make the amount of the gel per unit area on the peripheral part side larger than that on the central part side of the square panel molding surface of the mold. A flux is enlarged as the gel flows from the peripheral part side to the central part side of the panel, and a gel pressure is increased toward the central part so that gel cutting can well be prevented. On the panel peripheral side, since the excess gel escapes to the panel central part side, in spite of the existence of lattice-like channels in the mold surface, the woody packing resin gel can be spread in an enough uniform thickness on the entire molding surface of the mold. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a fiber pellet advantageous to enhance impact resistance, its manufacturing method and a fiber compounded resin molded product. SOLUTION: The fiber pellet is formed as a compacted body by at least pressurizing an aggregate of organic fibers having a powdery treatment agent, which contains a resin as a base material, supported thereon. This fiber pellet is manufactured by a process for bringing a liquid medium, in which the powdery treatment agent containing the resin as the base material is dispersed or dissolved, into contact with the organic fibers, a process for removing the liquid medium to support the powdery treatment agent on the surfaces of the organic fibers and a process for at least pressurizing the aggrigate of the organic fibers having the powdery treatment agent supported thereon to form the compacted body. All of organic fibers having a low bulk density can be used as the organic fibers and at least one of cotton, jute, Manila hemp, sisal hemp, kenaf, a bamboo, pulp and old paper can be used. The powdery treatment agent is preferably formed into a granular shape having a particle size of ≤350 μm, especially ≤80 μm, ≤70 μm and ≤60 μm. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a woody synthetic resin plate having a beautiful surface texture and a good quality, by using waste plastics and wood meal. SOLUTION: A material extruding passage 30 of an extruder 2 extending to a die 25 is so formed as to have a rectangular cross section, while the passage is provided with a pressure chamber 32 formed substantially in the shape of an ellipse by locally enlarging the width and the thickness of the passage. A thermoplastic resin such as polypropylene or polyethylene and fine powder of a cellulose material of wood, wastepaper, fiber or others are charged in the extruder and the resin mixed material is heated to 180-200°C, passed then through the pressure chamber and extruded. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve impact resistance by a method wherein woody fibers and thermoplastic resin reinforced fibers are entangled and made to exist in high dispersion in a thermoplastic resin matrix, while the melting point of the thermoplastic resin for the reinforced fibers is made higher than that for the matrix. SOLUTION: Woody fibers and thermoplastic resin fibers as reinforced fibers having a higher melting point than the one of thermoplastic resin fibers constituting a matrix are mixed in the thermoplastic resin fibers constituting the matrix and these fibers are made entangled with one another. Thermocompression molding is conducted thereafter at a temperature higher than the melting point of the thermoplastic resin fibers constituting the matrix and lower than the melting point of the thermoplastic resin fibers as the reinforced fibers. Herein the woody fibers and the reinforced fibers are disposed in the entangled state and in high dispersion in the matrix fibers. According to this constitution, a large resistance occurs to the progress of impact fracture on the occasion when impact is applied to a molded article and thus impact resistance can be improved.
Abstract:
PROBLEM TO BE SOLVED: To provide a resin impregnating apparatus for controlling an impregnating resin amount with high reproducibility and high accuracy. SOLUTION: In the resin impregnating apparatus comprising a resin impregnating tank 10, a resin-impregnating roll 1 dipped at a lower part of the roll in resin 11 of the tank 10, and a film thickness regulating plate 2 disposed near a surface of the roll 1 to finely slidably regulate by a screw mechanism 3, thereby regulating its resin film thickness of the resin 11 picked up to a surface of the roll 1 by rotation by the plate 2, then coating to impregnate to a fiber base material 9 in contact with an upper surface of the roll 1, a mechanism 6 for bringing the plate 2 into contact with the surface of the roll 1 by predetermined pressure is provided.