GB1216789A - Method for reclaiming the selvege of foamed thermoplastic web - Google Patents

Method for reclaiming the selvege of foamed thermoplastic web

Info

Publication number
GB1216789A
GB1216789A GB2158769A GB2158769A GB1216789A GB 1216789 A GB1216789 A GB 1216789A GB 2158769 A GB2158769 A GB 2158769A GB 2158769 A GB2158769 A GB 2158769A GB 1216789 A GB1216789 A GB 1216789A
Authority
GB
United Kingdom
Prior art keywords
selvage
articles
web
foamed thermoplastic
passed
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
GB2158769A
Inventor
Thomas Williamson Winstead
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2158769A priority Critical patent/GB1216789A/en
Publication of GB1216789A publication Critical patent/GB1216789A/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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

1,216,789. Reclaiming foamed thermoplastic selvage. T. W. WINSTEAD. 28 April, 1969, No. 21587/69. Heading B5A In a method where articles 5 are moulded from a foamed thermoplastic web 2, e.g. a foamed polystyrene web, the selvage 4a resulting from the cutting out of the articles by means of cutting roller 6 is densified and then passed to a granulator 11. As shown, the extrudate is passed immediately to moulding apparatus 3, which forms articles 5 by a vacuum or blowforming process, and the selvage is densified between rollers 7 and 9 or rollers 10. In mixer 13, virgin extrusion pellets are added to the granulate and the mixture is passed to extruder 1, the granulate forming 25-50% or more by weight of the mixture. Preferably the temperature of the selvage is reduced to below the boiling point of the blowing agent used, prior to densification. The forming of web 2 and the production of articles 5 may form a two-stage process. The invention may be applied to the single-stage article-forming process described in Specification 1,159,562.
GB2158769A 1969-04-28 1969-04-28 Method for reclaiming the selvege of foamed thermoplastic web Expired GB1216789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2158769A GB1216789A (en) 1969-04-28 1969-04-28 Method for reclaiming the selvege of foamed thermoplastic web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2158769A GB1216789A (en) 1969-04-28 1969-04-28 Method for reclaiming the selvege of foamed thermoplastic web

Publications (1)

Publication Number Publication Date
GB1216789A true GB1216789A (en) 1970-12-23

Family

ID=10165418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2158769A Expired GB1216789A (en) 1969-04-28 1969-04-28 Method for reclaiming the selvege of foamed thermoplastic web

Country Status (1)

Country Link
GB (1) GB1216789A (en)

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