EP0775230A1 - Heat reflective textile composites - Google Patents
Heat reflective textile compositesInfo
- Publication number
- EP0775230A1 EP0775230A1 EP95927869A EP95927869A EP0775230A1 EP 0775230 A1 EP0775230 A1 EP 0775230A1 EP 95927869 A EP95927869 A EP 95927869A EP 95927869 A EP95927869 A EP 95927869A EP 0775230 A1 EP0775230 A1 EP 0775230A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composite
- reflective
- fluoropolymer
- textile
- layer
- 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.)
- Withdrawn
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)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9416076A GB9416076D0 (en) | 1994-08-09 | 1994-08-09 | Textille composites |
GB9416076 | 1994-08-09 | ||
PCT/GB1995/001875 WO1996005360A1 (en) | 1994-08-09 | 1995-08-09 | Heat reflective textile composites |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0775230A1 true EP0775230A1 (en) | 1997-05-28 |
Family
ID=10759624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95927869A Withdrawn EP0775230A1 (en) | 1994-08-09 | 1995-08-09 | Heat reflective textile composites |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0775230A1 (en) |
AU (1) | AU3186095A (en) |
GB (1) | GB9416076D0 (en) |
WO (1) | WO1996005360A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE508134C2 (en) * | 1996-12-19 | 1998-08-31 | Fov Fabrics Ab | Heat reflective fabric for air bags in vehicles |
EP1185737A1 (en) * | 1999-06-17 | 2002-03-13 | GSG Knape Gleissanierung GmbH | Method for producing a trackway for a rail vehicle |
DE10042464A1 (en) | 2000-08-29 | 2002-03-28 | Dyneon Gmbh | Heat absorbing membranes |
EP1629972A1 (en) * | 2004-08-27 | 2006-03-01 | Ke-Burgmann A/S | Antistatic heat resistant barrier laminate |
Family Cites Families (5)
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 |
US4510194A (en) * | 1982-04-28 | 1985-04-09 | Asahi Kasei Textiles Ltd. | Heat-retaining moisture-transmissible water-resistant fabric |
JPS6359480A (en) * | 1986-08-22 | 1988-03-15 | 東レ株式会社 | Heat insulating fiber sheet |
JP2761967B2 (en) * | 1990-06-12 | 1998-06-04 | 淀川化成株式会社 | Fluororesin sheet material |
GB9027143D0 (en) * | 1990-12-14 | 1991-02-06 | Scapa Group Plc | Industrial fabrics |
-
1994
- 1994-08-09 GB GB9416076A patent/GB9416076D0/en active Pending
-
1995
- 1995-08-09 EP EP95927869A patent/EP0775230A1/en not_active Withdrawn
- 1995-08-09 AU AU31860/95A patent/AU3186095A/en not_active Abandoned
- 1995-08-09 WO PCT/GB1995/001875 patent/WO1996005360A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9605360A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU3186095A (en) | 1996-03-07 |
GB9416076D0 (en) | 1994-09-28 |
WO1996005360A1 (en) | 1996-02-22 |
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Legal Events
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