GB1345944A - Foamed materials - Google Patents

Foamed materials

Info

Publication number
GB1345944A
GB1345944A GB5001971A GB5001971A GB1345944A GB 1345944 A GB1345944 A GB 1345944A GB 5001971 A GB5001971 A GB 5001971A GB 5001971 A GB5001971 A GB 5001971A GB 1345944 A GB1345944 A GB 1345944A
Authority
GB
United Kingdom
Prior art keywords
core
coating
foam
composite filament
microapertures
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
GB5001971A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1345944A publication Critical patent/GB1345944A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/143—Halogen containing compounds
    • C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
    • C08J9/145—Halogen containing compounds containing carbon, halogen and hydrogen only only chlorine as halogen atoms
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

1345944 Coated filaments EI DU PONT DE NEMOURS & CO 2 Dec 1971 [3 Dec 1970] 56019/71 Heading B2E [Also in Divisions C3 and D1] A composite filament comprises a core of at least one continuous elastomeric yarn and a continuous sheath of a closed-cell polymeric foam modified in that walls of the cells contain microapertures, the core being under tension and the sheath being under compression along the fiber-axis of the composite filament when in unstressed condition. The composite filament is produced by feeding the elastomeric yarn through a zone in which it is held elongated under tension, applying a continuous coating of a foamable organic polymer composition thereto, flash-extruding the coated core so as to convert the foamable composition into a micro-apertured ultra-microcellular foam coating, and releasing the tension on the composite filament to allow the elastomeric core to retract partially and the sheath to be compressed longitudinally of the filament axis until a balance of forces is established, whereby the core is partially elongated and tensioned within its coating of micro-apertured ultramicrocellular foam. The microapertured ultramicrocellular foam is produced by a suitable adjustment of reaction conditions (polymer concentration, temperature). The synthetic polymer is preferably a polypropylene and the elastomeric yarn may be a spandex yarn. At least 50% of the cells in the foamed coating should preferably be interconnected by microapertures. The average microaperture area per cell is preferably at least and/or up to 50 microns. Preferably two or more cell walls per cell contain the microapertures, and generally the cells have an irregular polyhedral shape. The examples refer to coating polyurethane spandex yarn and a natural rubber core with a foamable composition comprising a linear propylene, methylene chloride and silica aerogel.
GB5001971A 1970-12-03 1971-12-02 Foamed materials Expired GB1345944A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9482170A 1970-12-03 1970-12-03

Publications (1)

Publication Number Publication Date
GB1345944A true GB1345944A (en) 1974-02-06

Family

ID=22247382

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5001971A Expired GB1345944A (en) 1970-12-03 1971-12-02 Foamed materials

Country Status (4)

Country Link
CA (1) CA998817A (en)
DE (1) DE2160097C3 (en)
GB (1) GB1345944A (en)
NL (1) NL7116603A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362890A1 (en) * 1976-08-30 1978-03-24 Akzo Nv MICROPOROUS PRODUCTS AND PROCESS FOR THEIR MANUFACTURE
WO2015016730A2 (en) 2013-08-02 2015-02-05 Active Aerogels, Unipessoal, Lda. Method for production of flexible panels of hydrophobic aerogel reinforced with fibre felts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362890A1 (en) * 1976-08-30 1978-03-24 Akzo Nv MICROPOROUS PRODUCTS AND PROCESS FOR THEIR MANUFACTURE
WO2015016730A2 (en) 2013-08-02 2015-02-05 Active Aerogels, Unipessoal, Lda. Method for production of flexible panels of hydrophobic aerogel reinforced with fibre felts

Also Published As

Publication number Publication date
DE2160097B2 (en) 1974-02-07
NL7116603A (en) 1972-06-06
DE2160097C3 (en) 1974-09-12
CA998817A (en) 1976-10-26
DE2160097A1 (en) 1972-06-22

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees