GB2480905A - A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form - Google Patents

A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form Download PDF

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Publication number
GB2480905A
GB2480905A GB1107220A GB201107220A GB2480905A GB 2480905 A GB2480905 A GB 2480905A GB 1107220 A GB1107220 A GB 1107220A GB 201107220 A GB201107220 A GB 201107220A GB 2480905 A GB2480905 A GB 2480905A
Authority
GB
United Kingdom
Prior art keywords
foam
auxetic
foams
conversion
manufacture
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.)
Granted
Application number
GB1107220A
Other versions
GB201107220D0 (en
GB2480905B (en
Inventor
Joseph Noel Grima
Daphne Attard
Ruben Gatt
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.)
Universita ta Malta UM
Original Assignee
Universita ta Malta UM
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 Universita ta Malta UM filed Critical Universita ta Malta UM
Publication of GB201107220D0 publication Critical patent/GB201107220D0/en
Publication of GB2480905A publication Critical patent/GB2480905A/en
Application granted granted Critical
Publication of GB2480905B publication Critical patent/GB2480905B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/35—Component parts; Details or accessories
    • B29C44/355—Characteristics of the foam, e.g. having particular surface properties or structure
    • B29C44/357—Auxetic foams, i.e. material with negative Poisson ratio; anti rubber; dilatational; re-entrant

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The present invention relates to a process which provides a route to convert conventional foams to auxetic foams as an alternative to existing thermomechanicalprocesses[ WO88 /00523 ]. The present process involves taking the said conventional foam, exposing it to a correspondingly suitable solvent, removing excess solvent, compressing it, drying the foam in the compressed state only releasing it after the crying process is complete. The solvent can also be used in a process to reconvert the auxetic foam, or any other foam made auxetic by any other process to a conventional foam. This process involves exposing the foam to a suitable solvent, pulling it (sometimes not necessary), and drying the foam.
GB1107220.4A 2008-10-30 2009-10-29 A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form Expired - Fee Related GB2480905B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MTP4236 2008-10-30
PCT/EP2009/064329 WO2010049511A2 (en) 2008-10-30 2009-10-29 A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form

Publications (3)

Publication Number Publication Date
GB201107220D0 GB201107220D0 (en) 2011-06-15
GB2480905A true GB2480905A (en) 2011-12-07
GB2480905B GB2480905B (en) 2013-08-14

Family

ID=42060603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1107220.4A Expired - Fee Related GB2480905B (en) 2008-10-30 2009-10-29 A novel process for the manufacture of auxetic foams and for the conversion of auxetic foam to conventional form

Country Status (2)

Country Link
GB (1) GB2480905B (en)
WO (1) WO2010049511A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105965930B (en) * 2016-06-20 2018-07-03 苏州芳磊蜂窝复合材料有限公司 A kind of interior cellular preparation method of hexagonal negative poisson's ratio
JP7309691B2 (en) * 2017-09-13 2023-07-18 ビーエーエスエフ ソシエタス・ヨーロピア Triaxially Compressed Auxetic Polyurethane and Melamine Foam
USD869872S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chair
USD869890S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chairback
USD870479S1 (en) 2017-12-05 2019-12-24 Steelcase Inc. Chair
USD869889S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chairback
USD907383S1 (en) 2019-05-31 2021-01-12 Steelcase Inc. Chair with upholstered back
USD907935S1 (en) 2019-05-31 2021-01-19 Steelcase Inc. Chair
CN110951108B (en) * 2019-10-25 2021-05-28 中国科学院长春应用化学研究所 Method for converting polymer negative Poisson's ratio foam into positive Poisson's ratio foam and foam low-cost transportation method
NL2025349B1 (en) * 2020-04-15 2021-10-26 Smart Mat Limited Method for the synthesis of an auxetic polyurethane foam with a defined cell structure and auxetic polyurethane foam obtainable by the method
CN115521596B (en) * 2022-10-10 2023-06-23 吉林省博砚科技有限公司 Polyhydroxyalkanoate auxetic foam and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007052054A1 (en) * 2005-11-04 2007-05-10 Auxetic Technologies Limited A process for the preparation of auxetic foams

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007052054A1 (en) * 2005-11-04 2007-05-10 Auxetic Technologies Limited A process for the preparation of auxetic foams

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FRISS E A ET AL: "Negative Poisson's ratio polymeric and metallic foams" JOURNAL OF MATERIALS SCIENCE, SPRINGER NETHERLANDS, NL LNKD - DOI:10.1007/BF00551939, vol. 23, 1 January 1988 , pages 4406-4414, XP002515796 - ISSN: 0022-2461 *
Grima J. N. et al: "A Novel Process for the Manufacture of Auxetic Foams andfor Their re-Conversion to Conventional Form" ADVANCED ENGINEERING MATERIALS (July 2009) vol. 11, no. 7, 13 May 2009, pages 533-535, XP002577220 WILEY-VCH Verlag GmbH & Co. KGaA Weinheim *

Also Published As

Publication number Publication date
WO2010049511A2 (en) 2010-05-06
WO2010049511A4 (en) 2010-09-10
GB201107220D0 (en) 2011-06-15
GB2480905B (en) 2013-08-14
WO2010049511A3 (en) 2010-07-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20171029