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WO1996005360A1 - Materiaux composites textiles reflechissant la chaleur - Google Patents

Materiaux composites textiles reflechissant la chaleur Download PDF

Info

Publication number
WO1996005360A1
WO1996005360A1 PCT/GB1995/001875 GB9501875W WO9605360A1 WO 1996005360 A1 WO1996005360 A1 WO 1996005360A1 GB 9501875 W GB9501875 W GB 9501875W WO 9605360 A1 WO9605360 A1 WO 9605360A1
Authority
WO
WIPO (PCT)
Prior art keywords
composite
reflective
fluoropolymer
textile
layer
Prior art date
Application number
PCT/GB1995/001875
Other languages
English (en)
Inventor
Jason Morey
Christopher Michael Heward
Original Assignee
Tygaflor Limited
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 Tygaflor Limited filed Critical Tygaflor Limited
Priority to AU31860/95A priority Critical patent/AU3186095A/en
Priority to EP95927869A priority patent/EP0775230A1/fr
Publication of WO1996005360A1 publication Critical patent/WO1996005360A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2433/00—Closed loop articles
    • B32B2433/02—Conveyor belts

Definitions

  • the present invention relates to flexible heat-reflective textile
  • Textile composites comprising a woven cloth substrate which is coated in a fluoropolymer, usually PTFE (polytetrafluoroethylene), are well
  • the composite begins to break down after a period of time.
  • the present invention provides a thermally reflective textile
  • fluoropolymer composite sheet material inter alia a conveyor belt.
  • a flexible heat-reflective textile composite comprising a textile substrate coated with
  • the metallic particles are flakes of aluminium but other
  • metallic particles such as copper, silver, gold, titanium, bronze and/or brass
  • flakes may also be suitable.
  • the textile substrate is preferably of woven glass fibres but could be a woven or non-woven layer of other temperature-resistant materials such as an aromatic polyamide (e.g. that known under the Trade Mark “Kevlar”), or a polyphenylene sulphide (e.g. that known under the Trade Mark “Nomex”).
  • aromatic polyamide e.g. that known under the Trade Mark “Kevlar”
  • polyphenylene sulphide e.g. that known under the Trade Mark "Nomex”.
  • the fluoropolymer could be a fluoroelastomer or a fiuoroplastic or a
  • the fluoropolymer is a fiuoroplastic for example, polyethylene tetrafluoride, fluorinated ethylene pol ⁇ pylene, polyvin ⁇ l fluoride or polvfluoroalkoxycopolymer (PFA).
  • a fiuoroplastic for example, polyethylene tetrafluoride, fluorinated ethylene pol ⁇ pylene, polyvin ⁇ l fluoride or polvfluoroalkoxycopolymer (PFA).
  • the composite preferably comprises a plurality of layers of
  • a method of manufacture of a heat reflective textile composite in which a textile substrate is passed through a bath containing an aqueous dispersion of fluoropolymer which further includes an aqueous based metallic flake
  • the flake pigment is preferably aluminium.
  • the bath containing the aqueous dispersion of the fluoropolymer and metallic flake pigment also includes a thickening agent for
  • the fluoropolymer dispersion is preferably an aqueous dispersion of
  • polytetrafluoroethylene suitable with 35 to 60% solids content.
  • the conveyor belt comprises a heat reflective textile composite, the reflective belt directing radiant heat away from the belt and onto the product to be treated.
  • Figure I is a schematic view of composite according to the invention.
  • Figure 2 is a sketch of an apparatus for manufacture of the composite of Figure I.
  • Figure 3 is a graph in which the thermal properties of a natural PTFE
  • a textile composite I0 comprises a central woven glass-fibre substrate II which is coated with a PTFE base layer 12,
  • base layer coatings are available from ICI under the designation GPI, and from DuPont UK under the designation 30-N.
  • the coated substrate II, 12 is coated on each side thereof with a reflective PTFE layer 13 which is formed with PTFE having metallic flakes dispersed therein.
  • outer layer 14 may be coated over the outerside of each reflective layer 13.
  • compositions for the outer layer coatings are available from ICI under
  • compositions of the final piuriiayer composite will be in the order
  • Aluminium between 0.5 and 20% by weight but is more preferably PTFE about 62%, glass about 37% and aluminium about 1.0% by weight.
  • the composite 10 is manufactured (see Figure 2) by passing a continuous woven substrate 21 drawn off a feed roll 22 through a bath 23 of aqueous PTFE dispersion to leave a coating on both sides of the substrate
  • the substrate 21 then passes between metering bars 24 (to remove excess coating material), through a first set of ovens 25 (to remove water),
  • a second set of ovens 26 for sintering the PTFE
  • the roll 27 can then form a new feed roll 22 so that the layers 12, 13,
  • PTFE 14 of PTFE can be built up on the substrate II by passing the substrate through aqueous dispersions in the bath 23 a number of times to build up a
  • the base layer 12 may be built up of between I to 8 coats, preferably
  • each reflective layer 13 may be built up of I or more coats
  • each optional outer layer 14 may be built up of I or more coats, (preferably two coats), of unpigmented PTFE dispersion.
  • the process can also be successfully conducted by
  • a base layer having six coats will have a
  • Each reflective layer will preferably contain about 7% by weight of aluminium dispersed in the PTFE.
  • the PTFE base layers 12 and outer layers 14 are formed by passing the substrate 21 (or coated substrate) through a 57-60% solid dispersion of PTFE
  • Surfactant such as graphite
  • fillers such as graphite
  • the two reflective layers 13 are formed by passing the coated
  • the pigment is preferably Aluminium Aquavox l752-207 “S” (available from Silberline Limited of Leven in Scotland) and is mixed with water prior
  • a thickening agent preferably a poiyacylic acid
  • the viscosity of the pigment- loaded mixture is adjusted to between 100 and 7000 centipoise, preferably
  • a preferred composition comprises (by weight) 96% PTFE
  • dispersions about 3.75% aluminium pigment, and 0.25% thickening agent.
  • the textile composite manufactured by the above-noted process can be used to make conveyor belts for curing/cooking processes and other processes requiring transportation of goods at elevated temperatures.
  • the thermal properties of a composite according to the invention have been compared with a prior art unpigmented textile composite.
  • the belt structure for the two materials both comprise a woven glass-fibre substrate having an areal weight of 200 gm/m 2 and being an "E" glass fabric coated with approximately 300 gm/m 2 PTFE (total on both sides of the substrate)
  • composition according to the invention included 4.2 gm/m 2 aluminium and will have been manufactured by a separate build up of the required number of coatings of PTFE in the manner describe above.
  • the textile composite was placed 700 mm in front of a hot (400°C) electrically heated element so that it was subjected to radiant heat.
  • a thermocouple was placed on the reverse side of the composite, away from
  • thermocouple was noted as a function of time.
  • Figure 3 shows the results obtained.
  • the composite according to the invention was significantly cooler than the prior art material.
  • the composite according to the invention reached a temperature of about I90°C whereas the prior art composite reached a maximum temperature of about 230°C.
  • a conveyor belt made of a textile composite according to the invention when passing through an oven heated in some proportion by
  • the oven can be maintained at a desired running temperature for a reduced energy input since the belt reflects radiant heat back into the product.
  • the aluminium-loaded layer may be a single aluminium layer built up from a number of coatings, or may be anywhere in the sequence of layers provided that its reflective properties are manifest at at least one outer surface of the
  • coated substrate or the film or both may contain one or more layers containing a metallic flake pigment, preferably aluminium.
  • the coated substrate and the film, depending on the manufacturing method used to produce each, are brought together using a melt processable "adhesive" film, preferably as described in US 4943473 and related patents and applications, or using techniques described in US 5I4I800 and related patent applications.
  • thermally reflective composite may preferably be used for a conveyor system
  • the material is applicable for uses in other areas requiring good thermal stability and/or reflective properties such as in ductings for hot air or gases where the composite may be used for ducting insulation and/or for flow dividers in ducts and for ducting compensators.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

Un matériau composite textile (10) souple et réfléchissant la chaleur comprend un substrat textile (11) revêtu d'au moins une couche (13) de fluoropolymère qui est pigmentée par des particules métalliques, de préférence des flocons d'aluminium, de sorte qu'un matériau composite réfléchissant la chaleur sur au moins une de ses surfaces soit formé.
PCT/GB1995/001875 1994-08-09 1995-08-09 Materiaux composites textiles reflechissant la chaleur WO1996005360A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU31860/95A AU3186095A (en) 1994-08-09 1995-08-09 Heat reflective textile composites
EP95927869A EP0775230A1 (fr) 1994-08-09 1995-08-09 Materiaux composites textiles reflechissant la chaleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9416076A GB9416076D0 (en) 1994-08-09 1994-08-09 Textille composites
GB9416076.9 1994-08-09

Publications (1)

Publication Number Publication Date
WO1996005360A1 true WO1996005360A1 (fr) 1996-02-22

Family

ID=10759624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001875 WO1996005360A1 (fr) 1994-08-09 1995-08-09 Materiaux composites textiles reflechissant la chaleur

Country Status (4)

Country Link
EP (1) EP0775230A1 (fr)
AU (1) AU3186095A (fr)
GB (1) GB9416076D0 (fr)
WO (1) WO1996005360A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030748A1 (fr) * 1996-12-19 1998-07-16 Fov Fabrics Ab Textile tisse destine aux airbags des vehicules automobiles
WO2000079053A1 (fr) * 1999-06-17 2000-12-28 Gsg Knape Gleissanierung Gmbh Procede de fabrication d'une voie ferree pour vehicules sur rails
WO2002018133A2 (fr) 2000-08-29 2002-03-07 3M Innovative Properties Company Article a faible pouvoir emissif dote d'une couche de fluoropolymere a faible pouvoir emissif
EP1629972A1 (fr) * 2004-08-27 2006-03-01 Ke-Burgmann A/S Film barrière antistatique laminé résistant à la chaleur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843386A (en) * 1972-01-13 1974-10-22 Du Pont Coating of glass fabric coated with aqueous dispersion of polymer
EP0093377A2 (fr) * 1982-04-28 1983-11-09 Asahi Kasei Textiles Ltd. Matériau textile retenant la chaleur, perméable à l'humidité et résistant à l'eau
JPS6359480A (ja) * 1986-08-22 1988-03-15 東レ株式会社 保温性繊維シ−ト
JPH0444841A (ja) * 1990-06-12 1992-02-14 Yodogawa Kasei Kk フッ素樹脂製シート材
EP0490661A2 (fr) * 1990-12-14 1992-06-17 Scapa Group Plc Tissus pour l'industrie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843386A (en) * 1972-01-13 1974-10-22 Du Pont Coating of glass fabric coated with aqueous dispersion of polymer
EP0093377A2 (fr) * 1982-04-28 1983-11-09 Asahi Kasei Textiles Ltd. Matériau textile retenant la chaleur, perméable à l'humidité et résistant à l'eau
JPS6359480A (ja) * 1986-08-22 1988-03-15 東レ株式会社 保温性繊維シ−ト
JPH0444841A (ja) * 1990-06-12 1992-02-14 Yodogawa Kasei Kk フッ素樹脂製シート材
EP0490661A2 (fr) * 1990-12-14 1992-06-17 Scapa Group Plc Tissus pour l'industrie

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8816, Derwent World Patents Index; Class A94, AN 88-109819 *
DATABASE WPI Section Ch Week 9213, Derwent World Patents Index; Class A94, AN 92-101547 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030748A1 (fr) * 1996-12-19 1998-07-16 Fov Fabrics Ab Textile tisse destine aux airbags des vehicules automobiles
WO2000079053A1 (fr) * 1999-06-17 2000-12-28 Gsg Knape Gleissanierung Gmbh Procede de fabrication d'une voie ferree pour vehicules sur rails
WO2002018133A2 (fr) 2000-08-29 2002-03-07 3M Innovative Properties Company Article a faible pouvoir emissif dote d'une couche de fluoropolymere a faible pouvoir emissif
WO2002018133A3 (fr) * 2000-08-29 2002-04-18 3M Innovative Properties Co Article a faible pouvoir emissif dote d'une couche de fluoropolymere a faible pouvoir emissif
EP1629972A1 (fr) * 2004-08-27 2006-03-01 Ke-Burgmann A/S Film barrière antistatique laminé résistant à la chaleur
WO2006021215A1 (fr) * 2004-08-27 2006-03-02 Ke-Burgmann A/S Stratifié à barrière antistatique résistante à la chaleur

Also Published As

Publication number Publication date
GB9416076D0 (en) 1994-09-28
AU3186095A (en) 1996-03-07
EP0775230A1 (fr) 1997-05-28

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