GB814320A - Process for the production of moulded articles or compact masses from polyethylene powder - Google Patents

Process for the production of moulded articles or compact masses from polyethylene powder

Info

Publication number
GB814320A
GB814320A GB13664/56A GB1366456A GB814320A GB 814320 A GB814320 A GB 814320A GB 13664/56 A GB13664/56 A GB 13664/56A GB 1366456 A GB1366456 A GB 1366456A GB 814320 A GB814320 A GB 814320A
Authority
GB
United Kingdom
Prior art keywords
powder
pressing
atmospheres
exceeding
atmosphere
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
GB13664/56A
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.)
Ruhrchemie AG
Original Assignee
Ruhrchemie AG
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 Ruhrchemie AG filed Critical Ruhrchemie AG
Publication of GB814320A publication Critical patent/GB814320A/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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/007—Treatment of sinter powders
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/005—Using a particular environment, e.g. sterile fluids other than air
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

Powdered polyethylene is formed into articles by, e.g., pressing and either during or after pressing sintering or plasticising the powder at 0 temperature not exceeding 350 DEG C. in a reducing atmosphere, e.g. hydrogen, carbon monoxide or water gas. The atmosphere may also contain an inert gas, e.g. nitrogen. The gas pressure may be atmospheric or, e.g., 10 to 200 atmospheres. The polyethylene is preferably one produced in the presence of a catalyst containing organometallic compounds, e.g. mixtures of titanium tetrachloride or zirconium or thorium acetyl, acetonate with diethyl aluminium chloride, aluminium triethyl or diisobutyl aluminium monochloride. The polymerization being effected at a pressure not exceeding 100 atmospheres and a temperature from 20 DEG to 100 DEG C. The reducing gases may be circulated through a preheater and a purifying device to remove oxygen. The particle size of the powder is preferably not greater than 0.25 mm. and the molecular weight is preferably greater than 500,000.ALSO:Powdered polythene is formed into articles by pressing and either during or after pressing, sintering or plasticizing the powder at a temperature not exceeding 350 DEG C. in a reducing atmosphere, e.g. hydrogen, carbon monoxide or water gas. The atmosphere may also contain an inert gas e.g. nitrogen. The gas pressure may be atmospheric or e.g. 10 to 200 atmospheres. The particle size of the powder is preferably greater than 0,25 m.m.
GB13664/56A 1955-06-10 1956-05-03 Process for the production of moulded articles or compact masses from polyethylene powder Expired GB814320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE547756X 1955-06-10

Publications (1)

Publication Number Publication Date
GB814320A true GB814320A (en) 1959-06-03

Family

ID=6734508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13664/56A Expired GB814320A (en) 1955-06-10 1956-05-03 Process for the production of moulded articles or compact masses from polyethylene powder

Country Status (2)

Country Link
BE (1) BE547756A (en)
GB (1) GB814320A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981979A (en) * 1959-09-17 1961-05-02 Phillips Petroleum Co Fabrication of porous articles from polyethylene
US3627869A (en) * 1967-10-06 1971-12-14 Phillips Petroleum Co Method of producing a laminated polyethylene-polypropylene article
US3846528A (en) * 1969-05-07 1974-11-05 Anaconda Co Method of continuous vulcanization in the presence of helium or hydrogen
DE2720534A1 (en) * 1977-05-06 1978-11-09 Polychemie Gmbh ADDITIVES TO ELASTIC SEALING COMPOUNDS AND ADHESIVE MATERIALS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138579A (en) * 1960-12-22 1964-06-23 Jefferson Chem Co Inc Method for preparing polyolefins of reduced ash content

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981979A (en) * 1959-09-17 1961-05-02 Phillips Petroleum Co Fabrication of porous articles from polyethylene
US3627869A (en) * 1967-10-06 1971-12-14 Phillips Petroleum Co Method of producing a laminated polyethylene-polypropylene article
US3846528A (en) * 1969-05-07 1974-11-05 Anaconda Co Method of continuous vulcanization in the presence of helium or hydrogen
DE2720534A1 (en) * 1977-05-06 1978-11-09 Polychemie Gmbh ADDITIVES TO ELASTIC SEALING COMPOUNDS AND ADHESIVE MATERIALS

Also Published As

Publication number Publication date
BE547756A (en)

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