WO1990015898A1 - Flexible coated substrates and method for their manufacture - Google Patents

Flexible coated substrates and method for their manufacture Download PDF

Info

Publication number
WO1990015898A1
WO1990015898A1 PCT/GB1990/000914 GB9000914W WO9015898A1 WO 1990015898 A1 WO1990015898 A1 WO 1990015898A1 GB 9000914 W GB9000914 W GB 9000914W WO 9015898 A1 WO9015898 A1 WO 9015898A1
Authority
WO
WIPO (PCT)
Prior art keywords
composite according
layer
substrate
fabric
silicone elastomer
Prior art date
Application number
PCT/GB1990/000914
Other languages
French (fr)
Inventor
Roger Sallis
Original Assignee
Courtaulds Plc
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 Courtaulds Plc filed Critical Courtaulds Plc
Publication of WO1990015898A1 publication Critical patent/WO1990015898A1/en
Priority to FI915615A priority Critical patent/FI915615A0/en

Links

Classifications

    • 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
    • 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
    • D06N3/12—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 otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/128—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 otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with silicon polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Reinforced Plastic Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

A composite comprising a fabric substrate which is coated with a blend comprising a halocarbon polymer and a silicone elastomer, and a method of manufacturing a flexible coated substrate which method includes the steps of forming a fibre fabric (10) coating the fabric with a coating material (11, 12, 14) comprising a blend of a halocarbon polymer and a silicone elastomer and heat treating the coating material to bond the same to the fabric.

Description

FLEXIBLE COATED SUBSTRATES AND METHOD FOR THEIR MANUFACTURE
This invention relates to new and useful composites comprising coated substrates.
Technical Field
In particular the present invention is concerned with coating a substrate, such as a knitted or woven fabric and in particular a glass fibre fabric, to provide a product that is flexible and also resistant to chemical attack.
More particularly the present invention relates to a new silicone elasto er/halocarbon polymer matrix useful as a coating for reinforced woven fabrics to produce a product which is flexible, exhibits good matrix integrity, and has good adhesion or bonding of the coating matrix to the substrate. The invention includes composites which have good chemical resistance at elevated temperatures and in humid environments. The invention further relates to a method of manufacturing such composites where the desirable high temperature chemical inertness of halocarbon polymers is combined with the desirable mechanical properties of silicone elastomers in such a way as to retain a desirable fabric-like flexibility.
Perhaps the most well-known subclass of halocarbon polymers are the fluoropolymers called "perfluoroplastics" which are generally recognised to have excellent electrical characteristics and physical properties, such as a low coefficient of friction, a low surface free energy (i.e. they are non-wetting to many organic fluids), and a very high degree of hydrophobicity. Fluoroplastics, and pai— ticularly perfluoroplastics (i.e. those fluoroplastics which do not contain hydrogen), such as polytetrafluoro- ethylene (PTFE), fluoro (ethylene-propylene) copolymer (FEP) and copolymers of tetrafluoroethylene and perfluoro- propyl vinyl ether (PFA), are resistant to a wide range of chemicals, even at elevated temperatures, making them particularly useful in a variety of industrial and domestic applications. However, due to the partially crystalline nature of these fluorocarbon polymers they exhibit a degree of stiffness or lack of compliance which is detrimental to the utilisation of these desirable properties. This shortcoming is particularly noticeable and objectionable in a reinforced composite where some degree of flexibility, elasticity, and/or conformabi1ity is necessary.
The broad class of fluoropolymers also includes fluoroelastomers which are not only elastomeric, but also possess, to a lesser degree the same physical and electri¬ cal properties as fluoroplastics.
Discussion of Prior Art
European Patent Application 125,955A - discloses a composite comprising a substrate coated with a coating comprising a blend of a fluoroplastic and a fluoroelas- tomer. This European patent application exploits the advantageous properties of perfluoroplastics, such as low co-efficient of friction, low surface free energy, a high degree of hydrophobicity and resistance to a wide range of chemicals at elevated temperatures, and combines this with the advantageous properties of flexibility (low flex modulus and conformabi!ity) which fluoroelastomers have.
However, fluoroelastomers which contain hydrogen (i.e. those which are partially fluorinated) generally degrade rapidly at high temperatures and result not only in the loss of physical integrity but also in the formation of hydrofluoric acid.
Hydrofluoric acid is highly corrosive to most mater¬ ials including those normally used to reinforce textile fabrics and particularly to fabric substrates such as glass fibre fabrics.
There is however, a need for a similar composite which is coated with a coating which will resist chemical attack and which will be flexible at elevated temperatures but which will not generate hydrofluoric acid that will have a deleterious effect on the substrate.
Summary of the Invention
This invention in terms of a composite is set out in the following claim 1, and in its method aspect it is set out in the following claim 15.
An object of preferred embodiments of the present invention is to provide a composite having a fabric sub¬ strate coated with a coating which will resist chemical attack and be flexible at high temperatures but will not degrade and react adversely with the fabric substrate.
The invention meets this objective in that flexibility is imparted by the use of a blend of a halocarbon polymer and a silicone elastomer, desirably a blend which does not break down to produce hydrofluoric acid.
Brief Description of the Drawing
The present invention will now be described, by way of example, with reference to the accompanying drawing, the sole figure of which is an enlarged schematic cross-sec¬ tional side view of a woven composite constructed in accordance with the present invention.
Description of Preferred Embodiments
Referring to the drawing a woven glass fabric sub¬ strate 10 is precoated with a silicone oil or a blend of silicone oil and a halocarbon polymer such as PTFE and overcoated on both sides with a fluoroplastic layer 11. The layer 11 is itself overcoated with a layer 12 which is a blend of a silicone elastomer and a halocarbon polymer. The resulting composite may be further coated on one or both sides with an optional polyfluoroethylene (or a blend of a halocarbon polymer and a silicone elastomer) top layer 14.
In greater detail, the method of manufacture of the composite shown in the drawing is as follows:
The substrate 10 is manufactured by weaving, or knitting aramid fibres (such as for example that known by the trademark "KEVLAR") or glass fibre filaments 10a to form the fabric substrate 10. Surface finishes or sizes are removed from the substrate by heat-cleaning it.
A saturant or lubricating agent, preferably poly(methylphenylsiloxane) oil, typically in a mixture containing 2 to 14 parts by weight of lubricating agent is applied as a first layer 11 to the substrate. This first layer is provided to minimise the stiffness of the com- pleted composite and may be a relatively thin covering. This first layer may be put down separately or incorporated with a halocarbon polymer such as PTFE.
In one embodiment of the invention a blend of a silicone elastomer and a halocarbon polymer is applied to the first layer by dipping the substrate in an aqueous dispersion comprising a blend of a silicone elastomer (e.g. in the form of a linear polymer) and polytetrafluoro¬ ethylene. The substrate is dried and baked in an oven at a temperature of between 200°F to 500°F (93°C to 260°C). The substrate was repeatedly dipped, dried and sintered until a second layer 12 of about 0.05 to 0.25 mm thickness was applied on top of the first layer 11. The coating of the second layer 12 contained between 10 to 50 per cent by weight of silicone elastomer (preferably 13 per cent by weight of silicone elastomer).
The coated substrate was further coated with a thin outer layer 14 of a PTFE by dipping it in the aqueous dispersion, drying and sintering at 700°F (370°C) for 1 minute.
More specifically, 564 g/m and 1050 g\m2 woven glass fibre substrate were heat cleaned to remove residual sizing. A combination of a fluorocarbon polymer such as
PTFE (as an aqueous dispersion containing 609. solids) and poly(methylphenylsiloxane) oil (as an aqueous dispersion containing 35* solids) was applied to each of the two substrates by dipping, drying and fusing the coating in a two-zone coating tower at drying temperatures of between 200 to 350°F (93 to 177°C) and sintering at a temperature of 700°F (370°C). The first layer formed by this coating contained 93 parts w/w PTFE and 7 parts w/w poly(methylphenylsiloxane) oil. This first layer was applied as a very light undercoat (typically 5 oz/square yard (170 g/m2)) so as not to induce stiffness. The interstices between the fibres of the substrate are unblocked at this stage.
A second layer was then applied to this first under¬ coat layer. The second layer of approximatel 680 g/m2 was applied from a blend of a perhalocarbon polymer such as PTFE as an aqueous dispersion containing 60 solids, and a silicone elastomer. The silicone elastomer was a linear poly(diorganosiloxane) emulsion which contains structural units of the formula:
R i - Si - 0
where R and R , which may be the same or different (and which may vary from one structural unit to another), are monovalent hydrocarbon radicals. The preferred silicone elastomer is linear poly(dimethylsiloxane) latex in the form of an emulsion. The emulsifier was anionic and the emulsion comprised 35 per cent by weight of polymer solids. The weight of vinyl in the polymer was 1.77 per cent. This second layer was applied in several passes by dipping, drying and sintering in a two-zone coating tower with drying temperatures of between 200 to 350°F (93 to 177°C) and a sintering temperature of 700°F (370°C). The blend of the second layer comprised 60% perhalocarbon polymer and 40% silicone elastomer, by weight.
A third layer was then applied to the second layer. This third layer comprised a perhalocarbon polymer (for example PTFE) applied as an aqueous dispersion containing 60% solids, and was dried and sintered at 700°F (370°C).
If a final smoothing of the coated substrate is deemed desirable, the final drying and sintering at.700°F (370°C) may be preceded by calendering (e.g. with a 300°F (149°C) calender). The final drying and sintering may be carried out by means of a final dry pass through the coating tower.

Claims

1. A composite comprising a fabric substrate which is coated with a blend comprising a halocarbon polymer and a silicone elastomer.
2. A composite according to claim 1, wherein the halocarbon polymer is a perhalocarbon polymer.
3. A composite according to claim 1 or claim 2, wherein the elastomer is a linear silicone elastomer.
4. A composite according to any one of claims 1 to 3, wherein the silicone elastomer is a linear poly(diorgano- siloxane) which contains structural units of the formula:
R - Si - 0 R1
where R and R , which may be the same or different (and which may vary from one structural unit to another), are monovalent hydrocarbon radicals.
5. A composite according to any one of claims 1 to 4, wherein the fabric substrate is formed of woven or knitted glass fibre filaments.
6. A composite according to any one of claims 1 to 4, wherein the fabric substrate is formed of woven or knitted aramid fibres.
7. A composite according to any one of claims 1 to 6, wherein the fabric substrate is coated with a first layer which comprises a silicone oil.
8. A composite according to claim 4, wherein the first layer comprises a blend of a halocarbon polymer and a silicone oil .
9. A composite according to claim 8, wherein the halocarbon polymer is pσlytetrafluoroethylene and the silicone oil is poly(methylphenylsiloxane).
10. A composite according to any one of claims 7 to 9, wherein the substrate is coated with a second layer com¬ prising a blend of a halocarbon polymer and a silicone elastomer.
11. A composite according to any one of the preceding claims wherein the silicone elastomer is in the form of an emulsion comprising a poly(dimethylsiloxane) latex and an anionic emulsifier.
12. A composite according to claim 10, or claim 11 as dependent on claim 10, wherein a third layer comprising a halocarbon polymer is applied to the second layer.
13. A composite according to claim 12, wherein the halocarbon polymer in at least the third layer is poly- tetraf1uoroethy1ene.
14. A method of manufacturing the composite claimed in any one of the preceding claims, which method includes the step of applying to the substrate a coating comprising a blend of a halocarbon polymer and a silicone elastomer.
15. A method of manufacturing a flexible coated substrate which method includes the steps of forming a fibre fabric, coating the fabric with a coating material comprising a blend of a halocarbon polymer and a silicone elastomer and heat treating the coating material to bond the same to the fabric.
PCT/GB1990/000914 1989-06-14 1990-06-13 Flexible coated substrates and method for their manufacture WO1990015898A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI915615A FI915615A0 (en) 1989-06-14 1991-11-28 FLEXIBLE CONVERTIBLE SAMPLES FOR FRAMSTERING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8913628.7 1989-06-14
GB8913628A GB8913628D0 (en) 1989-06-14 1989-06-14 Flexible coated substrate

Publications (1)

Publication Number Publication Date
WO1990015898A1 true WO1990015898A1 (en) 1990-12-27

Family

ID=10658397

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000914 WO1990015898A1 (en) 1989-06-14 1990-06-13 Flexible coated substrates and method for their manufacture

Country Status (6)

Country Link
EP (1) EP0477232A1 (en)
JP (1) JPH04506548A (en)
FI (1) FI915615A0 (en)
GB (1) GB8913628D0 (en)
IE (1) IE902134A1 (en)
WO (1) WO1990015898A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2733574A1 (en) * 1995-04-27 1996-10-31 Aerazur MATERIAL FOR THE PRODUCTION OF INFLATABLE STRUCTURES OR FLEXIBLE VOLUMES INTENDED TO CONTAIN GASES, AND METHOD FOR MAKING SUCH STRUCTURES OR SUCH VOLUMES
WO2001032416A1 (en) * 1999-11-03 2001-05-10 Oy Oms Optomedical Systems Ltd Elastic composite structure
WO2004088019A1 (en) * 2003-04-04 2004-10-14 Groep Masureel Veredeling Basalt containing fabric
WO2010075210A2 (en) 2008-12-22 2010-07-01 Saint-Gobain Performance Plastics Corporation Modified perfluoropolymer sheet material and methods for making same
CN107109782A (en) * 2014-10-07 2017-08-29 美国圣戈班性能塑料公司 Intensity retains fabric
US11230648B2 (en) 2016-10-24 2022-01-25 Saint-Gobain Performance Plastics Corporation Polymer compositions, materials, and methods of making

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7875563B2 (en) * 2007-03-28 2011-01-25 Honeywell International Inc. Method to create an environmentally resistant soft armor composite
JP2013248874A (en) * 2012-05-30 2013-12-12 Saint-Gobain Performance Plastics Corp Modified perfluoropolymer material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1082375A (en) * 1952-08-28 1954-12-29 Connecticut Hard Rubber Co Coated fabric and method of manufacturing this fabric
US4210697A (en) * 1978-09-15 1980-07-01 Pall Corporation Process for preparing hydrophobic porous fibrous sheet material of high strength and porosity and product
EP0125955A2 (en) * 1983-04-13 1984-11-21 Chemical Fabrics Corporation Novel reinforced fluoropolymer composite and method for making same
DE3628187C1 (en) * 1986-08-20 1988-02-04 Windel Textil Gmbh & Co Filter material for separating off particles and process for producing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1082375A (en) * 1952-08-28 1954-12-29 Connecticut Hard Rubber Co Coated fabric and method of manufacturing this fabric
US4210697A (en) * 1978-09-15 1980-07-01 Pall Corporation Process for preparing hydrophobic porous fibrous sheet material of high strength and porosity and product
EP0125955A2 (en) * 1983-04-13 1984-11-21 Chemical Fabrics Corporation Novel reinforced fluoropolymer composite and method for making same
DE3628187C1 (en) * 1986-08-20 1988-02-04 Windel Textil Gmbh & Co Filter material for separating off particles and process for producing the same

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2733574A1 (en) * 1995-04-27 1996-10-31 Aerazur MATERIAL FOR THE PRODUCTION OF INFLATABLE STRUCTURES OR FLEXIBLE VOLUMES INTENDED TO CONTAIN GASES, AND METHOD FOR MAKING SUCH STRUCTURES OR SUCH VOLUMES
WO1996034141A1 (en) * 1995-04-27 1996-10-31 Aerazur Textile material for making inflatable structures
US9878499B2 (en) 1999-11-03 2018-01-30 Oy Oms Optomedical Systems Ltd Elastic composite structure
US7153789B1 (en) 1999-11-03 2006-12-26 Oy Oms Optomedical Systems Ltd Elastic composite structure
WO2001032416A1 (en) * 1999-11-03 2001-05-10 Oy Oms Optomedical Systems Ltd Elastic composite structure
WO2004088019A1 (en) * 2003-04-04 2004-10-14 Groep Masureel Veredeling Basalt containing fabric
EP2376571A2 (en) * 2008-12-22 2011-10-19 Saint-gobain Performance Plastics Corporation Modified perfluoropolymer sheet material and methods for making same
CN102449061A (en) * 2008-12-22 2012-05-09 美国圣戈班性能塑料公司 Modified perfluoropolymer sheet material and methods for making same
EP2376571A4 (en) * 2008-12-22 2013-06-19 Saint Gobain Performance Plast Modified perfluoropolymer sheet material and methods for making same
CN102449061B (en) * 2008-12-22 2014-08-20 美国圣戈班性能塑料公司 Modified perfluoropolymer sheet material and methods for making same
US8969222B2 (en) 2008-12-22 2015-03-03 Saint-Gobain Performance Plastics Corporation Modified perfluoropolymer sheet material and methods for making same
WO2010075210A2 (en) 2008-12-22 2010-07-01 Saint-Gobain Performance Plastics Corporation Modified perfluoropolymer sheet material and methods for making same
CN107109782A (en) * 2014-10-07 2017-08-29 美国圣戈班性能塑料公司 Intensity retains fabric
EP3204569A4 (en) * 2014-10-07 2018-07-11 Saint-Gobain Performance Plastics Corporation Strength retention fabric
CN107109782B (en) * 2014-10-07 2022-11-15 美国圣戈班性能塑料公司 Strength-retaining fabric
US11230648B2 (en) 2016-10-24 2022-01-25 Saint-Gobain Performance Plastics Corporation Polymer compositions, materials, and methods of making

Also Published As

Publication number Publication date
JPH04506548A (en) 1992-11-12
IE902134L (en) 1990-12-14
GB8913628D0 (en) 1989-08-02
FI915615A0 (en) 1991-11-28
EP0477232A1 (en) 1992-04-01
IE902134A1 (en) 1991-01-02

Similar Documents

Publication Publication Date Title
US5230937A (en) Reinforced fluoropolymer composite
US4770927A (en) Reinforced fluoropolymer composite
CA1261687A (en) Wear resistant fluoropolymer-containing flexible composites and method for preparation thereof
US4654235A (en) Novel wear resistant fluoropolymer-containing flexible composites and method for preparation thereof
US5194335A (en) Fluoropolymer coating and casting compositions and films derived therefrom
EP0348425B1 (en) Protective surface treatment and relative product
EP0159942A2 (en) Fluoropolymer composites and novel method for making them
US6425977B2 (en) Manufacture of plain bearings
US5501879A (en) Abrasion-resistant coated fiber structure
WO1990015898A1 (en) Flexible coated substrates and method for their manufacture
CA1264618A (en) Reinforced fluoropolymer composite and method for making same
US20020123282A1 (en) Fluoropolymer composites
WO2001096695A1 (en) Composite membrane for control of interior environments
US5194322A (en) Coated textile materials
KR20190086724A (en) Heat resistant tape and manufacturing method thereof
US7470453B1 (en) Method for forming flexible composites using polymer coating materials
JPS6197474A (en) Flexible chemically treated cloth and coated cloth
US4010306A (en) Processes for impregnating and coating triaxial weave fabrics
KR102353055B1 (en) Heat-resistant composite sheet and manufacturing method thereof
JPS62257842A (en) Incombustible waterproof sheet having light transmittance
CA1264997A (en) Flexible, chemically treated bundles of fibers and process
JPS6226902B2 (en)
Finch Applications of Polymer Latices in Manufacture and Finishing of Textiles

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): FI JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 915615

Country of ref document: FI

WWE Wipo information: entry into national phase

Ref document number: 1990909181

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1990909181

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1990909181

Country of ref document: EP