GB1493300A - Injection moulding of ultra high molecular weight polyethylene - Google Patents

Injection moulding of ultra high molecular weight polyethylene

Info

Publication number
GB1493300A
GB1493300A GB5339375A GB5339375A GB1493300A GB 1493300 A GB1493300 A GB 1493300A GB 5339375 A GB5339375 A GB 5339375A GB 5339375 A GB5339375 A GB 5339375A GB 1493300 A GB1493300 A GB 1493300A
Authority
GB
United Kingdom
Prior art keywords
mould
injected material
polythene
molecular weight
injection
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB5339375A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Publication of GB1493300A publication Critical patent/GB1493300A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0658—PE, i.e. polyethylene characterised by its molecular weight
    • B29K2023/0683—UHMWPE, i.e. ultra high molecular weight polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

1493300 Injection moulding ultra high molecular weight polythene MITSUI PETROCHEMICAL INDUSTRIES Ltd 31 Dec 1975 [13 Jan 1975] 53393/75 Heading B5A A process for injection moulding ultra high molecular weight polythene comprises injecting polythene into a mould cavity having a volume 1-5 to 3À0 times that of the injected material, at a shear rate of at least 50,000 see.<SP>-1</SP> at the injection nozzle, to fill the mould with flashed powder and subsequently reducing the volume of the mould to a volume 1.5 times, or less, than that of the injected material to compress the powder into the final article. Porous or solid articles may be made depending upon the degree of compression. Shear rates of 50,000 to 1,000,000 sec.<SP>-1</SP> (particularly 200,000-500,000 see.<SP>-1</SP>) are preferred and cavity volumes of 1.7 to 2.5 times that of the injected material are preferred. Injection temperatures of 140‹ C.- 300‹ C. can be used, depending upon the intrinsic viscosity of the injected material. In the illustrated embodiment, polythene 8 is injected by a plunger 9 from a heated cylinder 10 into the mould cavity defined between a fixed mould part 3 and a mould part 7 movable to compress the injected material by means of a piston and cylinder arrangement 5, 6. Compression may be affected directly after injection or up to one minute or more after it. Low mould cavity temperatures, e.g. 25‹ C. to 75‹ C. (in the specific examples) can be used.
GB5339375A 1975-01-13 1975-12-31 Injection moulding of ultra high molecular weight polyethylene Expired GB1493300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP561175A JPS5181861A (en) 1975-01-13 1975-01-13 CHOKOBUNSHIRYOHORIECHIRENNO SHASHUTSUSEIKEIHO

Publications (1)

Publication Number Publication Date
GB1493300A true GB1493300A (en) 1977-11-30

Family

ID=11615984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5339375A Expired GB1493300A (en) 1975-01-13 1975-12-31 Injection moulding of ultra high molecular weight polyethylene

Country Status (5)

Country Link
JP (1) JPS5181861A (en)
DE (1) DE2600923C2 (en)
FR (1) FR2297130A1 (en)
GB (1) GB1493300A (en)
IT (1) IT1060541B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035916A1 (en) * 1980-03-12 1981-09-16 Rank Xerox Limited Conversion apparatus for injection moulding machines
GB2282560A (en) * 1993-09-14 1995-04-12 Idemitsu Petrochemical Co Injection/compression moulding equipment
CN114368106A (en) * 2021-12-31 2022-04-19 北京化工大学 Injection molding method of ultra-high molecular weight polyethylene microporous filter material

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058010B2 (en) * 1981-04-14 1985-12-18 三井化学株式会社 Injection compression molding method
EP0091903A1 (en) * 1981-05-21 1983-10-26 KUBAT, Josef Injection moulding process using high pressures
JPS60196321A (en) * 1984-03-19 1985-10-04 Asahi Chem Ind Co Ltd Molding method of polyolefin resin
DE68923957T2 (en) * 1988-09-28 1996-06-13 Dainippon Printing Co Ltd MANUFACTURING METHOD OF A SLIDE DEVICE.
JPH082572B2 (en) * 1990-11-09 1996-01-17 株式会社小松製作所 Method for producing ultrahigh molecular weight polyethylene porous body and product thereof
FR2733933B1 (en) * 1995-05-11 1997-06-27 Sommer Ind PROCESS FOR OBTAINING A SOUNDPROOFING ROOM AND INJECTED ROOM ACCORDING TO SUCH A PROCESS
JP4148583B2 (en) * 1999-01-21 2008-09-10 積水化学工業株式会社 Method for producing difficult-to-mold resin molded body
DE60238279D1 (en) 2002-03-18 2010-12-23 Ntn Toyo Bearing Co Ltd FORM BODY OF CONDUCTIVE RESIN

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270269B (en) * 1963-08-03 1968-06-12 Eckert & Ziegler G M B H Mold closing and opening device for mold filling machines, especially injection molding machines
DE1779504B2 (en) * 1968-08-21 1972-05-31 Eckert & Ziegler Gmbh, 8832 Weissenburg METHOD FOR PROCESSING HEAT-RESISTANT PLASTICS, IN PARTICULAR THERMAL PLASTICS FROM THE AMINOPLASTIC FAMILY ON INJECTION MOLDING MACHINES

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035916A1 (en) * 1980-03-12 1981-09-16 Rank Xerox Limited Conversion apparatus for injection moulding machines
GB2282560A (en) * 1993-09-14 1995-04-12 Idemitsu Petrochemical Co Injection/compression moulding equipment
US5529483A (en) * 1993-09-14 1996-06-25 Idemitsu Petrochemical Co., Ltd. Compression equipment of injection compression molding machine and injection compression molding machine
GB2282560B (en) * 1993-09-14 1997-12-17 Idemitsu Petrochemical Co Compression equipment of injection compression molding machine and injection compression molding machine
CN114368106A (en) * 2021-12-31 2022-04-19 北京化工大学 Injection molding method of ultra-high molecular weight polyethylene microporous filter material

Also Published As

Publication number Publication date
FR2297130A1 (en) 1976-08-06
DE2600923A1 (en) 1976-07-15
DE2600923C2 (en) 1985-09-26
IT1060541B (en) 1982-08-20
JPS5730067B2 (en) 1982-06-26
JPS5181861A (en) 1976-07-17
FR2297130B1 (en) 1978-11-10

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19951230