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21. 发明专利

JPS60229936A PRODUCTION OF EXPANDED POLYMER PARTICLE 失效
公开(公告)号：JPS60229936A
公开(公告)日：1985-11-15
申请号：JP8676384
申请日：1984-04-28
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , YAMAGUCHI TOORU , KANBE MASATO , KUWABARA HIDEKI
IPC分类号： C08J9/30 , C08J9/16 , C08J9/18
摘要： PURPOSE:To produce easily and stably expanded polymer particles having high content of closed cells and improved moldability, by using an inorganic gas containing molecular nitrogen as a foaming agent. CONSTITUTION:1pts.wt. polymer particles, preferably polyolefin based resin and >=1.5pts.wt. liquid dispersing agent, e.g. water or ethylene glycol, and preferably a fusion inhibitor, e.g. aluminum oxide, for the polymer particles, are put into a pressurized vessel under >=20atm, preferably >=30atm pressure, and mixed, and the resultant mixture is then heated at a softening temperature of the polymer particles or above. An inorganic gas containing molecular nitrogen, preferably nitrogen gas or air is brought into contact with the mixture at the above-mentioned temperature preferably in the presence of a volatile impregnation assistant, e.g. acetone, and the resultant polymer particles and the liquid dispersing agent are released to the outside of the pressurized vessel and expanded to afford the aimed expanded particles. In case the above-mentioned expanded particles are used as a preliminarily expanded particles for hot molding, the expansion ratio is preferably 5-50 times.

22. 发明专利

JPS60176747A MANUFACTURE OF POLYOLEFINIC RESIN ITEM FOAMED AND MOLDED IN MOLD 失效
公开(公告)号：JPS60176747A
公开(公告)日：1985-09-10
申请号：JP3215184
申请日：1984-02-22
申请人： JAPAN STYRENE PAPER CORP
发明人： KUWABARA HIDEKI , KITAGAWA ATSUSHI
IPC分类号： B29C44/00 , B29K23/00 , B29K105/04 , C08J9/22
摘要： PURPOSE:To obtain the titled molded item that is low in scattering of dimensions, and is excellent in dimensional stability, surface smoothness and fusion of the particles, by holding particles, which are preparatorily foamed, under pressure, and loading the particles into a mold having a cracking under pressure without decreasing the volume. CONSTITUTION:A suitable quantity of polyolefinic resin preparatorily foamed particles held under pressure in a pressurizing tank 1 is transferred to an intermediate tank 4, where the particles are held under pressure, and then the particles are fed to a mold 10 by compressed air. The air fed to a molding chamber 20 together with the preparatorily foamed particles 19' is discharged outside through crackings 24, and the preparatorily foamed particles are loaded under pressure into the chamber 20 without the volume of the particles being substantially reduced.

23. 发明专利

JPS6028856B2 失效
公开(公告)号：JPS6028856B2
公开(公告)日：1985-07-06
申请号：JP21303081
申请日：1981-12-28
申请人： JAPAN STYRENE PAPER CORP
发明人： AKYAMA HIROYUKI , YOSHIMURA SHOHEI , KUWABARA HIDEKI , SUDO YOSHIMI
IPC分类号： C08J9/22 , C08J9/16

24. 发明专利

JPS60123540A NONCROSSLINKED POLYPROPYLENE RESIN PREFOAMED PARTICLE 失效
公开(公告)号：JPS60123540A
公开(公告)日：1985-07-02
申请号：JP23095683
申请日：1983-12-07
申请人： JAPAN STYRENE PAPER CORP
发明人： KUWABARA HIDEKI , SUDOU YOSHIMI
IPC分类号： C08J9/16 , C08J9/18 , C08J9/228 , C08L23/14
摘要： PURPOSE:To produce the titled particles having excellent moldability in a mold, by foaming a base resin composed of an ethylene-propylene random copolymer and an alpha-olefin-propylene random copolymer having a heat of crystallization within a specific range. CONSTITUTION:The particles of a base resin composed of (A) 10-95wt% alpha- olefin-propylene random copolymer having a heat of crystallization of =5 deg.C.

25. 发明专利

JPS6042434A PRODUCTION OF POLYPROPYLENE RESIN FOAM MOLDING 失效
公开(公告)号：JPS6042434A
公开(公告)日：1985-03-06
申请号：JP14930083
申请日：1983-08-16
申请人： JAPAN STYRENE PAPER CORP
发明人： KUWABARA HIDEKI , KITAGAWA ATSUSHI , SUDOU YOSHIMI
IPC分类号： C08J9/22 , B29B9/12 , B29C44/00 , B29K23/00 , B29K105/04
摘要： PURPOSE:To obtain a molding having a good surface appearance and excellent dimensional accuracy, shrinkage, compressive hardness, etc., by imparting expandability to pre-expanded PP resin particles having a specified crystal structure and a specified decreasing rate of an internal pressure, filling a molding die with the particles, and expansion-molding them. CONSTITUTION:Expandability is imparted to pre-expanded particles which have such a crystal structure that a DSC curve obtained when 1-3mg of the pre- expanded PP particles are heated to 220 deg.C at a temperature rise rate of 10 deg.C/ min on a differential scanning calorimeter has a high-temperature peak on the high temperature side in relation to the temperature of the intrinsic peak inherent in the PP resin, and show an internal pressure drop rate at 25 deg.C and 1atm, k, in the range: k

26. 发明专利

JPS6042433A EXPANDED SYNTHETIC RESIN IN-MOLD MOLDING AND ITS PRODUCTION 失效
公开(公告)号：JPS6042433A
公开(公告)日：1985-03-06
申请号：JP14929983
申请日：1983-08-16
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , KUWABARA HIDEKI
IPC分类号： C08J9/22 , B29C44/00 , B29K23/00 , B29K105/04 , B29L9/00
摘要： PURPOSE:To produce the titled molding in which expanded particles constituting the surface layer have a specified flattened shape, by filling surface layer portions with pre- expanded particles having a heat expansion force smaller than that of the pre-expanded particles in the inner layer portion and heat-molding the whole. CONSTITUTION:A molding die 7 is protioned into three compartments by diaphragms 6, 6, and molding chambers 9, 9 are filled with pre-expanded particles 13, 13 having a heat expansion force Ps (kg/cm .abs) satisfying the relationship: Pi/Ps>1.5 (wherein Pi (kg/cm .abs) is the heat expansion force of the pre-expanded particles with which molding chamber 10 is filled). After removing the diaphragms 6, 6, the whole system is heated. By the expansion of the pre-expanded particles of the pre-expanded particles 12 in the inner portion, the pre-expanded particles 13, 13 having a smaller heat expansion force in the surface layre portion are pressed and expand flatly to form a molding in which the ratio, Lf/Ld, is larger than 3.5, wherein Lf(mm.) is the average diameter along the face and Ld(mm.) is the average diameter along the thickness. This molding has a smooth surface, so that when used as a core material, it shows excellent adhesion to a covering material and forms a product of good appearance particularly in the case of a thin covering material.

27. 发明专利

JPS6032835A MANUFACTURE OF FOAMED POLYOLEFIN RESIN ARTICLE 失效
公开(公告)号：JPS6032835A
公开(公告)日：1985-02-20
申请号：JP14268383
申请日：1983-08-04
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , KUWABARA HIDEKI , HASHIBA MASAHIRO
IPC分类号： C08J9/22 , B29B9/12 , B29C44/00 , B29K23/00 , B29K105/04
摘要： PURPOSE:To prevent the mutual fusion of particles in the prefoaming process, and to keep the weldability of the particles in molding, by prefoaming foamable resin particles in the presence of CO2 using basic magnesium carbonate as a dispersing agent, and foaming the prefoamed particles in the form of a molded article. CONSTITUTION:Polyolefin resin particles are dispersed in a dispersing medium together with a foaming agent comprising CO2 or a mixture of CO2 and a volatile organic compound using a fine particles of basic magnesium carbonate as a dispering agent, in a closed vessel. The dispersion is heated at a temperature above the softening temperature of the resin particles to effect the impregnation of the foaming agent in the particle. An end of the closed vessel is opened to release the particles and the dispersion medium at the same time from the vessel to the outer atmosphere having lower pressure to obtain prefoamed particles. The prefoamed particles are pressurized with inorganic gas or a mixture of the inorganic gas and an organic foaming agent, filled in a molding mold, and heated and expanded to obtain the molded article having the form of the mold cavity.

28. 发明专利

JPS6026029A THERMOPLASTIC ELASTOMER RESIN 失效
公开(公告)号：JPS6026029A
公开(公告)日：1985-02-08
申请号：JP13192783
申请日：1983-07-21
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , KUWABARA HIDEKI , HASHIBA MASAHIRO
IPC分类号： C08G69/48 , C08G69/00 , C08G69/40
摘要： PURPOSE:A thermoplastic elastomer resin excellent in moldability, especially expansion moldability, prepared by crosslinking a polyamide-base thermoplastic elastomer resin to such an extent that it can show properties of specified ranges. CONSTITUTION:A thermoplastic elastomer resin comprising a block copolymer having crystalline polyamide segments and polyether segments (e.g., polylaurolactam/polytetrahydrofuran block copolymer) is crosslinked to such an extent that it has a melt index (at 250 deg.C) >=0.5g/10min and can retain melt flowability. The produced thermoplastic elastomer resin is excellent in moldability, especially expansion moldability and excellent also in rubber elasticity, tensile strength, low-temperature properties, and resistances to impact, abrasion, chemicals, water, and heat. In addition, it has an affinity for dyes and suitable hydrophilicity and further it can be formed into a high-elasticity foam by melt expansion molding.

29. 发明专利

JPS6024933A PRESSURIZING TREATMENT OF PRE-EXPANDED PARTICLE 失效
公开(公告)号：JPS6024933A
公开(公告)日：1985-02-07
申请号：JP13255283
申请日：1983-07-20
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , KUWABARA HIDEKI , YAMAGUCHI TOORU
IPC分类号： C08J9/22 , B29B9/16 , B29B15/00 , B29C44/00 , B29C44/34 , B29K23/00 , B29K67/00 , B29K105/04
摘要： PURPOSE:To raise the bonding property of expanded grains as well as prevent the occurrence of sink by a method in which pre-expanded grains are put in a container, the internal pressure of the container is regulated to the same pressure as the internal pressure of the grains, the container is heated to a temperature at which no bonding and no contraction occur in the expanded grains to raise the internal pressure of the container, and the container is gradually cooled while keeping the internal pressure of the container. CONSTITUTION:Pre-expanded grains are put in an enclosed container, and the internal pressure of the container is regulated to the same pressure as the internal pressure of the grains. The container is gradually heated to a temperature enough to avoid the bonding and contraction of the grains, and the grains are slowly cooled while keeping the internal pressure of the container high. The pre-expanded grains are slowly cooled to room temperature, and the internal pressure of the container is lowered to ordinary pressure to obtain the pre-expanded grains whose internal pressure is 1.2-1.6 times higher than the original internal pressure of the grains. In the pressurizing treatment, the pre-expanded grains are treated in such a way as to avoid the contraction of the grains in order to provide an internal pressure necessary for molding for the grains. Therefore, the lowering of properties due to the breakage of bubble walls and occurrence of wrinkle, fawls, etc., on the surfaces of the grains do not occur. Since no contraction occurs in the grains, internal pressures necessary for molding can be provided for the grains in a short time.

30. 发明专利

JPS608047A MANUFACTURE OF PRE-EXPANDED PARTICLE MOLDING 失效
公开(公告)号：JPS608047A
公开(公告)日：1985-01-16
申请号：JP11649983
申请日：1983-06-28
申请人： JAPAN STYRENE PAPER CORP
发明人： YOSHIMURA SHIYOUHEI , KUWABARA HIDEKI , KITAGAWA ATSUSHI , HASHIBA MASAHIRO
IPC分类号： B29C44/00 , B29K105/04
摘要： PURPOSE:To obtain a molding composed of well-bonded pre-expanded particles, having good appearance, by better effective and uniform heating process by a method in which pre-expanded particles are packed into molds whose inner surface is attached with a screen with many small through holes and then expanded and bonded to one another by heating by means of a heating medium. CONSTITUTION:Pre-expanded particles 3 (e.g., of ethylene-propylene random copolymer, etc.) are packed into molds 1 whose inner surface is attached with a screen having many small through holes (e.g., metal net, etc.) and heated by a heating medium (e.g., steam usually) supplied through steam holes 4. The pre-expanded particles 3 are expanded and bonded to one another by heating, cooled, and taken out of the molds 1 to obtain a molding.

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