WO1997014524A1 - Matiere composite pour la fabrication d'un corps fritte - Google Patents

Matiere composite pour la fabrication d'un corps fritte Download PDF

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Publication number
WO1997014524A1
WO1997014524A1 PCT/JP1996/003011 JP9603011W WO9714524A1 WO 1997014524 A1 WO1997014524 A1 WO 1997014524A1 JP 9603011 W JP9603011 W JP 9603011W WO 9714524 A1 WO9714524 A1 WO 9714524A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
producing
binder
sintered
volume
Prior art date
Application number
PCT/JP1996/003011
Other languages
English (en)
Japanese (ja)
Inventor
Yoshimitsu Kankawa
Hiroshi Ikeda
Akira Fusamoto
Original Assignee
Polyplastics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polyplastics Co., Ltd. filed Critical Polyplastics Co., Ltd.
Publication of WO1997014524A1 publication Critical patent/WO1997014524A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]

Definitions

  • the present invention relates to a composition for producing a sintered compact.
  • Precision sintered compacts and sintered compacts with complicated shapes are generally manufactured by the following method using sinterable powder. That is, first, the sinterable powder and the bing are heated and kneaded, and then cooled to granulate the molding material. Next, at L, this is injection molded to produce a green molded body. : The green molding leave is subjected to a degreasing process, which is then sintered. Of these, the degreasing step is performed to remove the binder from the green compact. It is also the most important process for producing high quality sintered compacts without defects such as cracks, swelling and deformation.
  • the green molded body is heated to decompose and thermally decompose the gas to remove it by gasification, or the green molded body is treated with a solvent to elute and remove soluble components
  • the decomposition gas of the binder emanates from the surface of the green compact or the binder oozes out and evaporates, and the heating rate is increased to increase the binder temperature in the green compact.
  • the sinterable powder contained in the composition for producing a sintered compact has a small particle size and a large specific surface area, and is a granular material
  • the sinterable powder is used as a molding material for producing a green compact. It is necessary to increase the amount of the binder to stabilize the heating fluidity. Therefore, in the degreasing step when the composition for producing a sintered compact made of such granules is used, it is necessary to devise a heating step or the like in multiple stages in order to remove a large amount of the binder. .
  • the sinterable powder contained in the composition for producing a sintered compact is a metal powder or a spherical powder having a high specific gravity.
  • the formed body is often deformed in the heating degreasing step. Therefore, in this case also, it is necessary to slow down the rate of temperature rise during degreasing.
  • Voids are formed in the body, and through these passages, thermal decomposition and gasification of the remaining binder by heating are performed smoothly. As a result, cracking, swelling, deformation and the like of the green molded body in the degreasing step can be avoided.
  • binders contain a large amount of liquid raw materials such as mineral oils, fatty acid-based oils, and natural oils, so that these oil components often ooze out from the green compact.
  • a green molded body stored for a long period of time has a more severe bleeding out of the oil component. Accordingly, cracks and swelling may occur during degreasing by solvent treatment due to the oil component oozing out on the surface of the green molded body.
  • polyacetal resins are chemically stable and have poor compatibility with many other organic components, for example, other resins, waxes, lubricants and the like that constitute the binder. Therefore, if a polyacetal resin is used alone as a binder component, it may be difficult to obtain a homogeneous sintered compact because the layer is easily separated from other binder components. In particular, is it necessary to increase the proportion of the polyacetal resin in the total binder in order to improve the shape retention of the green compact and the shape retention of the compact in the degreasing process by heating, and to increase the heat degreasing efficiency? However, the above drawbacks are further exacerbated by the lack of affinity of the polyacetal resin for other resins, resins or lubricants.
  • a green molded body can be degreased by heating in a short time, and the molded body is not cracked, swelled, deformed, etc. in the degreasing step, and has high dimensional accuracy and uniform layer without layer separation.
  • An object of the present invention is to provide a composition for producing a sintered molded article from which a sintered molded article can be obtained.
  • the present invention relates to a composition for producing a sintered compact containing a sinterable powder and a binder, wherein the binder is a polyacetal resin (A), a modified polyolefin resin (B), and other binder components (C ), wherein the proportion of the polyacetal resin (A) is in the range of 5 to 60% by volume, the proportion of the modified polyolefin resin (B) is in the range of 5 to 85% by volume, and the proportion of the polyacetal resin (
  • An object of the present invention is to provide a composition for producing a sintered compact, characterized in that the composition is such that the sum of A) and the modified polyolefin resin (B) satisfies the respective proportions in the range of 10 to 90% by volume.
  • the present invention provides the composition for producing a sintered molded article, which is a modified polyolefin resin (B) and a copolymer of orefin and an unsaturated monomer having a glycidyl group.
  • the modified polyolefin resin (B) is a polymer of force-olefin or a copolymer of orefine and another unsaturated monomer as a base material, to which a vinyl polymer is chemically bonded in a branched or cross-linked structure. It is another object of the present invention to provide a composition for producing a sintered molded article, which is a copolymer.
  • the present invention also provides the composition for producing a sintered molded article, which is a vinyl polymer or a polymer comprising one or more monomers selected from (meth) acrylic acid or its alkyl ester, acrylonitrile, and styrene. Things.
  • the modified polyolefin resin (B) It is intended to provide the above-mentioned composition for producing a sintered molded product, which is obtained by copolymerizing polyethylene, polypropylene or ethylene-glycidyl methacrylate copolymer with acrylonitrile-styrene copolymer, polymethyl methacrylate or polystyrene. is there.
  • the present invention provides the composition for producing a sintered molded article, wherein the other binder component (C) is at least polyethylene or paraffin wax.
  • the present invention provides the composition for producing a sintered molded article, wherein the binder content in the composition for producing a sintered molded article is 100 to 60% by volume. It is.
  • the composition for producing a sintered molded article of the present invention comprises a sinterable powder and a binder.
  • the sinterable powder that can be used in the composition for producing a sintered molded article of the present invention includes ceramics, metals, There is a summary.
  • the binder used in the composition for producing a sintered compact of the present invention comprises a polyacetal resin (A), a modified polyolefin resin (B), and other binder components (C). It is preferable that the polyacetal resin (A) is contained in the binder in an amount of 5 to 60% by volume, preferably 10 to 50% by volume, and particularly preferably 15 to 40% by volume.
  • Polyacetal resin (A) When the volume is less than 5% by volume in the binder, the thermal deformation temperature of the green molded body is greatly reduced, and the molded body is likely to be deformed in the degreasing step by heating. Become. In addition, the residual pressure after degreasing of the green molded body increases, and a sintered molded body of good quality cannot be obtained. On the other hand, if the force of the polyacetal resin (A) exceeds 60% by volume in the binder, the amount of decomposition gas generated from the polyacetal resin in the degreasing step by heating the green molded body increases, and the molding in the degreasing step Cracks and blisters are likely to occur in the body.
  • the polyacetal resin (A) constituting the binder used in the present invention may be a high molecular compound having an oxymethylene group (—CH 20 —) as a main structural unit.
  • —CH 20 — oxymethylene group
  • Any of copolymers, terpolymers, and block copolymers containing other structural units can be used.
  • the molecule may have not only a linear shape but also a branched or cross-linked structure.
  • the binder used in the composition for producing a sintered molded article of the present invention comprises a modified polyolefin resin in an amount of 5 to 85% by volume, more preferably 10 to 70% by volume, particularly preferably 15 to 60% by volume in a binder. It is preferable that the content is contained by volume.
  • the proportion in the binder is less than 5% by volume, the compatibility between the polyacetal resin (A) and the other binder component (C) is significantly reduced, and it is difficult to obtain a good green molded body. However, it may cause cracking or swelling in the heating degreasing step. Further, when the modified polyolefin resin (B) exceeds 85% by volume in the binder, the blending ratio of the polyacetal resin (A) is inevitably restricted, and as described above, the thermal deformation temperature of the green molded body is reduced. This may cause deformation of the molded body in the degreasing process due to the decrease and increase in the amount of residual carbon after degreasing.
  • the total content of the polyacetal resin (A) and the modified polyolefin resin (B) is preferably from 10 to 90% by volume in the binder, preferably from 15 to 80% by volume, particularly preferably from 15 to 80% by volume.
  • the content is 20 to 70% by volume
  • the balance is other binder components (C)
  • the total content is less than 10% by volume in the binder, molding in the degreasing step by heating is performed. If the volume exceeds 90% by volume, the fluidity of the composition will be low, making it impossible to carry out injection molding when molding a green molded body.
  • the modified polyolefin resin (B) is an olefin polymer modified by the introduction of an aromatic group or a polar group, and includes, for example, various copolymers obtained by copolymerization and graphite copolymerization as described below. Can be exemplified.
  • a vinyl polymer for example, a copolymer mainly composed of polymethyl methacrylate, polystyrene, or polystyrene, may be added to a olefin polymer such as polyethylene, polypropylene, or ethylene-propylene copolymer.
  • a olefin polymer such as polyethylene, polypropylene, or ethylene-propylene copolymer.
  • a copolymer of ⁇ -olefin and an unsaturated compound for example, / S-unsaturated acid glycidyl ester
  • another monomer copolymerizable with the polymer for example, acrylic acid
  • monomers such as nitrile, styrene, methyl methacrylate, methyl acrylate, methacrylic acid, or a vinyl (co) polymer composed of these monomers, for example, polymethyl methacrylate, polystyrene, polyacrylonitrile, acrylonitrile
  • Olefin homopolymer Olefin copolymer, Olefin and other vinyl monomers such as gen compounds, derivatives of ⁇ , —unsaturated acids or esters thereof, or vinyl compounds, etc.
  • a hydroxyl-modified olefin polymer obtained by reacting an unsaturated compound having a hydroxyl group with an olefin-based polymer composed of a copolymer mainly composed of a polymerized olefin;
  • Olefin homopolymer Olefin copolymer, Olefin and other vinyl monomers such as gen compounds, a, -unsaturated acids or esters thereof, etc.
  • An unsaturated carboxylic acid or a derivative thereof for example, an unsaturated dicarboxylic acid such as maleic acid or fumaric acid or a derivative thereof, An unsaturated carboxylic acid such as anhydride, acrylic acid, or methacrylic acid, or an ester thereof, copolymerized by graft polymerization or the like,
  • An epoxy-modified olefin polymer obtained by heating an olefin polymer and an epoxy group-containing monomer such as dalicydyl methacrylate and glycidyl acrylate in the presence of a radical initiator;
  • the binder used in the composition for producing a sintered molded article of the present invention is a thermoplastic resin or wax other than the above-mentioned polymacetal resin (A) and modified polyolefin resin (B) as other binders (component (C)).
  • An organic substance such as a plasticizer or a lubricant can be used.
  • thermoplastic resin examples include an acrylic resin, polyethylene, polypropylene, polystyrene, polyvinyl butyral, and the like.
  • waxes examples include paraffin wax, polyethylene wax, calhana wax, polyethylene glycol, beeswax, wood wax, and synthetic wax.
  • plasticizer examples include phthalic acid-based compounds such as dioctyl phthalate, dibutyl phthalate and getyl phthalate.
  • examples of the lubricant include fatty acid esters such as stearate esters. And its derivatives.
  • the above components can be used alone or in combination of two or more. In this case, it is preferable that at least one of them is polyethylene or paraffin.
  • the composition for producing a sintered molded article of the present invention is preferably prepared by adding 20 to 60% by volume, preferably 25 to 55% by volume, It is preferable to contain 30 to 50% by volume.
  • the mixing ratio of each component constituting the binder can be appropriately selected depending on the type of sinterable powder such as ceramics, metal, cermet, etc. to be used.
  • the polyacetal resin (A) and the modified polyolefin resin (B) of the ',' one component may be mixed in advance or melted and kneaded to ffl. Without mixing or kneading, it may be compounded with other ingredients.
  • the composition for producing a sintered compact according to the present invention is a molding material for injection molding a green compact which is a preform of the sintered compact.
  • the composition for producing a sintered compact is heated and kneaded, then cooled and granulated to obtain a molding material for a green compact.
  • This molding material is injection-molded to produce a green molded body.
  • the green molded body is subjected to a degreasing step by heating or the like, and further, the green body after degreasing is sintered.
  • the desired sintered compact is obtained.
  • composition for producing a sintered compact of the present invention will be described based on examples, but the present invention is not limited to these examples.
  • SUS316L with an average particle diameter of 10 m is used as the sinterable powder, and the polyacetal resin (A), the modified polyolefin resin (B) shown in Table 1 and other binder components (C ) Were combined in the proportions shown in Tables 2 and 3 to prepare a composition for producing a sintered compact.
  • the temperature is raised to 320 ° C at a temperature rising rate of 30 ° C for 2 hours, and further to 320 ° C for 2 hours. It was subjected to a degreasing process under the heating conditions maintained.
  • Modification amount Modified polyolefin resin (S3 ⁇ 4%) Poly (ethylene) copolymer of poly (methyl methacrylate) 30
  • POM Polyacetal (LI)
  • P1 Low-density polyethylene
  • Wax Paraffin wax
  • Fig. 1 is a diagram showing the shape of a dumbbell test piece molded from a green compact
  • Fig. 2 is a diagram showing the measurement position of the amount of deformation after degreasing of a green compact in the shape of a dumbbell specimen. is there.
  • the composition for producing a sintered molded article of the present invention uses a polyacetal resin, which is a depolymerized polymer, as a binder.
  • the green molded article produced from the composition for producing a sintered molded article of the present invention is excellent in shape retention based on the rigidity of the polyacetal resin and shape retention of the molded article in the degreasing step by heating, and the solution The degreasing step can be shortened depending on the polymerization characteristics.
  • the composition for producing a sintering mold according to the present invention contains a modified polyolefin resin as a binder, which exhibits good compatibility with other binder components, and thus has a uniform sintering without layer separation. You can get the shape.
  • the degreasing step of the green compact can be completed by heating in a short time, and cracks, swelling, deformation and the like P are generated in the compact during the degreasing step. There is no sintering, high dimensional accuracy, and a homogeneous sintered compact without I 'separation.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

Une matière composite, destinée à la fabrication d'un corps fritté, permet de raccourcir le processus de dégraissage d'une ébauche, élimine les défauts tels que les fissures, les cloques, les déformations et autres, dans le corps moulé, lors du dégraissage, et permet de fabriquer un corps fritté présentant une grande précision dimensionnelle, exempt de décollement et homogène. La matière composite précitée contient une poudre apte au frittage et un liant constitué par: (A) uné résine de polyacétal, (B) une résine de polyoléfine dénaturée et (C) d'autres constituants. Par rapport à la quantité totale de liant, la proportion de résine de polyacétal (A) est comprise entre 5 et 60 % en volume, celle de résine de polyoléfine dénaturée (B) est de 5 à 85 % en volume et la somme des deux proportions de (A) et (B) est de 10 à 90 % en volume.
PCT/JP1996/003011 1995-10-17 1996-10-17 Matiere composite pour la fabrication d'un corps fritte WO1997014524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP07293289A JP3113806B2 (ja) 1995-10-17 1995-10-17 燒結成形体製造用組成物
JP7/293289 1995-10-17

Publications (1)

Publication Number Publication Date
WO1997014524A1 true WO1997014524A1 (fr) 1997-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/003011 WO1997014524A1 (fr) 1995-10-17 1996-10-17 Matiere composite pour la fabrication d'un corps fritte

Country Status (4)

Country Link
JP (1) JP3113806B2 (fr)
KR (1) KR100434648B1 (fr)
TW (1) TW353100B (fr)
WO (1) WO1997014524A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101128502B1 (ko) * 2009-12-30 2012-03-27 한국피아이엠(주) 분말사출성형용 바인더 조성물 및 그 제조방법
JP5970795B2 (ja) * 2011-11-30 2016-08-17 セイコーエプソン株式会社 射出成形用組成物の製造方法
JP5857688B2 (ja) 2011-11-30 2016-02-10 セイコーエプソン株式会社 射出成形用組成物および焼結体の製造方法
JP5970794B2 (ja) 2011-11-30 2016-08-17 セイコーエプソン株式会社 射出成形用組成物および焼結体の製造方法
JP6020961B2 (ja) * 2012-09-27 2016-11-02 日立金属株式会社 射出成形用組成物とそれを用いた焼結体の製造方法
KR102125964B1 (ko) * 2017-09-20 2020-06-23 주식회사 엘지화학 질화규소 소결체 제조를 위한 테이프 캐스팅용 슬러리 조성물
JP2021080350A (ja) * 2019-11-18 2021-05-27 合同会社モルージ 射出成形用組成物とその製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141458A (ja) * 1983-01-21 1984-08-14 ヘキスト・セラニーズ・コーポレーション セラミックの射出成形用ポリアセタ−ル系結合剤
JPH02145704A (ja) * 1988-11-24 1990-06-05 Sanyo Chem Ind Ltd 成形用組成物
JPH04247802A (ja) * 1990-07-07 1992-09-03 Basf Ag 金属成形体を製造するための熱可塑性組成物およびその製造法
JPH05501536A (ja) * 1989-11-13 1993-03-25 ヘキスト・セラニーズ・コーポレーション 成形されたセラミック未処理ボディーからポリアセタール系結合剤を除去する方法
JPH0598306A (ja) * 1990-03-08 1993-04-20 Basf Ag 金属成形体製造用熱可塑性材料
JPH06158107A (ja) * 1992-11-28 1994-06-07 Sanyo Chem Ind Ltd 射出成形用組成物

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141458A (ja) * 1983-01-21 1984-08-14 ヘキスト・セラニーズ・コーポレーション セラミックの射出成形用ポリアセタ−ル系結合剤
JPH02145704A (ja) * 1988-11-24 1990-06-05 Sanyo Chem Ind Ltd 成形用組成物
JPH05501536A (ja) * 1989-11-13 1993-03-25 ヘキスト・セラニーズ・コーポレーション 成形されたセラミック未処理ボディーからポリアセタール系結合剤を除去する方法
JPH0598306A (ja) * 1990-03-08 1993-04-20 Basf Ag 金属成形体製造用熱可塑性材料
JPH04247802A (ja) * 1990-07-07 1992-09-03 Basf Ag 金属成形体を製造するための熱可塑性組成物およびその製造法
JPH06158107A (ja) * 1992-11-28 1994-06-07 Sanyo Chem Ind Ltd 射出成形用組成物

Also Published As

Publication number Publication date
JPH09111305A (ja) 1997-04-28
JP3113806B2 (ja) 2000-12-04
KR100434648B1 (ko) 2004-10-06
KR980700140A (ko) 1998-03-30
TW353100B (en) 1999-02-21

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