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1. 发明专利

JPS62238709A MANUFACTURE OF CONDUCTIVE MOLDING MATERIAL AND EQUIPMENT THEREFOR 失效
公开(公告)号：JPS62238709A
公开(公告)日：1987-10-19
申请号：JP8275786
申请日：1986-04-10
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： TAKEDA KAZUYA , KAWAGUCHI TETSUTO , SUZUKI YUKIO , HERAI TOSHIO , TAKAHAMA HIRONOBU , TAMAKI YUJI
IPC分类号： H01B1/22 , B29B9/06 , B29B9/14 , B29B11/10 , B29C47/00 , B29K105/22 , H05K9/00
摘要： PURPOSE:To accelerate soak of molten resin into a metallic fiber bundle, by displacing the metallic fiber bundle in the direction meeting at a right angle with an axial direction to molten resin with which the metallic fiber bundle is covered at the inside of a die or an outlet part of the same. CONSTITUTION:Thermoplastic resin is charged into an extruding machine 1 through a hopper 2 of the same, melted and extruded by a screw 3 and supplied to a resin covering equipment 4. A metallic fiber bundle 5 is supplied to the resin covering equipment 4 after the same has been preheated by a heating equipment 6. The resin covering equipment 4 is constituted of a mandrel 7, a molten thermoplastic resin tank 8 and a die 9. The metallic fiber bundle 5 is impregnated and covered with the thermoplastic resin, a resin-covered material 10 of the metallic fiber bundle is extruded in a stranded state through the die 9, which is cut off by a pelletizer 11 after cooling and made into pellets. With this construction, a molding material which is small in quantity of the resin, sticks the resin to the metallic fiber bundle through impregnation and is superior in electromagnetic shielding properties, dispersion properties and external appearance properties can be obtained.

2. 发明专利

JPS62240512A MANUFACTURE OF ELECTRICALLY-CONDUCTIVE RESIN PELLET 失效
公开(公告)号：JPS62240512A
公开(公告)日：1987-10-21
申请号：JP8389586
申请日：1986-04-11
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： HERAI TOSHIO , TAKAHAMA HIRONOBU , TAMAKI YUJI , TAKEDA KAZUYA , KAWAGUCHI TETSUTO , SUZUKI YUKIO
IPC分类号： H01B1/22 , B29B9/06 , B29B9/14 , B29B11/02 , B29C45/00 , B29K105/06 , B29K105/22 , H05K9/00
摘要： PURPOSE:To improve the dispersibility of fiber, electromagnetic wave shielding property and manufacturing workability of a molded item by a method wherein a specified die is employed for dispersing metal fibers in a thermoplastic resin composition as uniformly as possible in a resin. CONSTITUTION:Thermoplastic resin is charged through the hopper 2 of an extruder 1, melted with a screw 3 and then fed to a die part (covering part) 5. A fiber bundle 4 enters through a fiber bundle feeding port 8 and passes through the die part 5 so as to be covered and impregnated with resin. A strand 14, which is drawn out of the flat die 5, is cooled and cut off with a pelletizer 6 and finally received in a receiver 7. Stainless steel, copper, brass or the like is employed as the metal fiber bundle. Here, when the mean diameter of the metal fiber is (d) (mm) and the bundle is composed of (n) fibers, the height (h) (mm) of an opening part 9 on the die outlet side is set so as to lie within the range of 0.8dn and its width (l) (mm) is set so as to lie within the range of 5.3dn >=l>=26.5dn . As a result, the favorable dispersibility of fiber is obtained.

3. 发明专利

JPH02158200A ELECTRIC CONDUCTIVE THERMOPLASTIC RESIN COMPOSITION 失效
公开(公告)号：JPH02158200A
公开(公告)日：1990-06-18
申请号：JP31322188
申请日：1988-12-12
申请人： NIPPON STEEL CHEMICAL CO
发明人： YOSHIMURA YASUO , TAKENAKA HIDEO , TAKEDA KAZUYA
IPC分类号： H05K9/00
摘要： PURPOSE:To improve surface appearance, and to obtain excellent electromagnetic-wave trouble preventive characteristics by containing a specific quantity of a methyl methacrylate-butadiene-styrene copolymer resin in a styrene group resin. CONSTITUTION:A 5-50wt.% MBS resin (a methyl methacrylate-butadiene-styrene copolymer resin) is included in all styrene group resin comprising the MBS resin in addition to the styrene group resin. That is, when the MBS resin is compounded into such a styrene group resin composition at a fixed rate, a phenomenon in which styrene fibers are exposed to the surface of a molded form, and the appearance of the molded form is improved remarkably. The loading of the MBS resin in all styrene group resin must be kept within a range of 5-50wt.%, and it is desirable that the loading is kept within a range of 10-30wt.% particularly. The effect of the improvement of appearance is not displayed sufficiently when the loading of the MBS resin is made smaller than 5wt.%, and the viscosity of the resin composition is increased and moldability is inhibited when the loading exceeds 50wt.%. The molded form using such a conductive resin composition is employed, thus acquiring an electromagnetic shielding housing having excellent appearance.

4. 发明专利

JPH0260959A POLYCARBONATE RESIN COMPOSITION 失效
公开(公告)号：JPH0260959A
公开(公告)日：1990-03-01
申请号：JP21053688
申请日：1988-08-26
申请人： NIPPON STEEL CHEMICAL CO
发明人： FUJITAKA TOSHIHISA , AIBA AKIRA , TAKEDA KAZUYA
IPC分类号： C08K7/04 , C08K7/00 , C08L69/00
摘要： PURPOSE:To obtain the title composition which can give a molding having a low warpage and improved strength and rigidity by mixing a broken mineral fiber of a specified aspect ratio with a composition based on a polycarbonate resin and an inorganic fiber. CONSTITUTION:This polycarbonate resin composition comprises 20-80wt.%, desirably, 40-70wt.% polycarbonate resin (desirably, of an MW of about 12000-40000) and 80-20wt.%, desirably, 60-30wt.% inorganic fiber, wherein the inorganic fiber comprises 85-15wt.% glass fiber and 15-85wt.% broken mineral fiber (rock wool broken so that the mean fiber length (L) may be 20-500mum, desirably, 50-20mum, and the aspect ratio (L/D) may be 5-100, desirably, 10-60). In order to further improve the antistatic property of a molding of the polycarbonate resin composition, the composition of the inorganic fiber is 10-50wt.% carbon fiber, 10-80wt.% glass fiber and 10-80wt.% broken mineral fiber.

5. 发明专利

JPH039952A THERMOPLASTIC RESIN COMPOSITION 失效
公开(公告)号：JPH039952A
公开(公告)日：1991-01-17
申请号：JP14415489
申请日：1989-06-08
申请人： NIPPON STEEL CHEMICAL CO
发明人： MACHIDA IKUO , KAWAGUCHI TETSUTO , TAKEDA KAZUYA , SUZUKI YUKIO
IPC分类号： C08K7/02 , C08L55/00 , C08L55/02 , C08L67/00 , C08L67/02 , C08L77/00
摘要： PURPOSE:To decrease the mold shrinkage factor (anisotropy) and to improve the appearance of a molded item by compounding a resin component consisting of a noncrystalline polyamide resin and another thermoplastic resin with an inorg. fiber consisting of a glass fiber and a ground mineral fiber. CONSTITUTION:A resin component (A) is obtd. by compounding 90-30wt.% (hereinbelow described as %) noncrystalline polyamide resin and 10-70% other thermoplastic resin, pref. a crystalline polyamide resin, a polyester resin or a vinyl (co)polymer. Separately, an inorg. fiber (B) is obtd. by compounding 90-10% glass fiber contg. pref. 50-70% SiO2, 2-15% Al2O3 and 10-20% CaO and having a mean fiber length of 1-10mm, a mean fiber diameter of 5-20mum and an aspect ratio of 50 or larger and 10-90% ground mineral fiber with a mean fiber length of 20-500mum and an aspect ratio of 5-100, pref. 10-60. 20-70% component A is compound with 80-30% component B.

6. 发明专利

JPH02129248A STAINLESS FIBER-FILLED CONDUCTIVE MOLDING MATERIAL 失效
公开(公告)号：JPH02129248A
公开(公告)日：1990-05-17
申请号：JP28236188
申请日：1988-11-10
申请人： NIPPON STEEL CHEMICAL CO
发明人： TAKENAKA HIDEO , YOSHIMURA YASUO , TAKEDA KAZUYA
IPC分类号： C08K7/02 , C08K7/00 , C08L25/00
摘要： PURPOSE:To obtain the title molding material having a good appearance, uniformly dispersed metal fibers and an excellent electromagnetic wave shielding effect by coating a stainless steel fiber bundle with a specified coating resin composition, cutting the coated bundle and mixing the cut bundle with a styrene resin. CONSTITUTION:A fiber bundle comprising a stainless steel fiber of a diameter of desirably 2-50mum is coated with a coating resin composition containing a low-MW thermoplastic resin (e.g., low-MW PE) of an MW =150 deg.C and an styrene resin (e.g., styrene/acrylonitrile copolymer resin/ABS resin) desirably of an MW >=50000 in a mixing ratio of the former to the latter of desirably 0.1-30wt.% to 70-99.9wt.%. The coated bundle is cut to a predetermined length, and the cut bundle is mixed with a styrene resin (e.g., ABS resin) as a matrix resin.

7. 发明专利

JPH0370769A THERMOPLASTIC RESIN COMPOSITION 失效
公开(公告)号：JPH0370769A
公开(公告)日：1991-03-26
申请号：JP20684089
申请日：1989-08-11
申请人： NIPPON STEEL CHEMICAL CO
发明人： MACHIDA IKUO , TAKEDA KAZUYA , SUZUKI YUKIO
IPC分类号： C08K7/04 , C08K7/00 , C08L25/04 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain a resin composition having high strength and rigidity and small moisture-absorption and giving a molded article having excellent dimensional accuracy and appearance by compounding a polyester resin and a vinyl copolymer with glass fibers and specific crushed mineral fibers as fillers. CONSTITUTION:The resin composition is composed mainly of (A) 20-70wt.% of a resin component composed of (A1) 70-30wt.% of a polyester resin (preferably PET or PBT) and (A2) 30-70wt.% of a vinyl copolymer (preferably AS, ABS, etc.) and (B) 80-30wt.% of inorganic fibers composed of (B1) 90-10wt.% of glass fibers having an average fiber length of 1-10mm, an average fiber diameter of 5-20mum (preferably 10-15mum) and an aspect ratio of >=50, preferably glass fiber containing 10-20wt.% of CaO, 50-10wt.% of SiO2 and 2-15wt.% of Al2O3 and (B2) 10-90wt.% of crushed mineral fiber (e.g. rock wool) having an aspect ratio of 5-100 (preferably 10-60).

8. 发明专利

JPH02276846A ELECTRICALLY CONDUCTIVE THERMOPLASTIC RESIN COMPOSITION 失效
公开(公告)号：JPH02276846A
公开(公告)日：1990-11-13
申请号：JP99990
申请日：1990-01-09
申请人： NIPPON STEEL CHEMICAL CO
发明人： YOSHIMURA YASUO , TAKENAKA HIDEO , TAKEDA KAZUYA
IPC分类号： C08K7/04 , C08K7/00 , C08L25/04 , C08L27/06 , H05K9/00
摘要： PURPOSE:To obtain the subject composition suitable for electromagnetic field shield housing, having excellent surface appearance and preventing characteristics of electromagnetic wave fault by blending a styrene-based resin composition with a resin component having bonding function to stainless steel and stainless steel fibers. CONSTITUTION:A styrene-based resin (e.g. high-impact polystyrene or acrylonitrile-butadiene-styrene copolymer) composition containing 2-50mum diameter is blended with 1-50wt.%, preferably 1-30wt.% resin component (e.g. thermoplastic polyester resin or polypropylene maleic anhydride copolymer) having bonding function to stainless steel and stainless steel fibers.

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