CA2254499A1 - Breathable tent fabric - Google Patents
Breathable tent fabric Download PDFInfo
- Publication number
- CA2254499A1 CA2254499A1 CA002254499A CA2254499A CA2254499A1 CA 2254499 A1 CA2254499 A1 CA 2254499A1 CA 002254499 A CA002254499 A CA 002254499A CA 2254499 A CA2254499 A CA 2254499A CA 2254499 A1 CA2254499 A1 CA 2254499A1
- Authority
- CA
- Canada
- Prior art keywords
- coating
- tentage
- major face
- styrene
- acrylic copolymer
- 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.)
- Abandoned
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 claims abstract description 81
- 239000011248 coating agent Substances 0.000 claims abstract description 64
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 24
- 229920000728 polyester Polymers 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims abstract description 13
- 239000004814 polyurethane Substances 0.000 claims abstract description 13
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229920002239 polyacrylonitrile Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 8
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- UOCIZHQMWNPGEN-UHFFFAOYSA-N dialuminum;oxygen(2-);trihydrate Chemical compound O.O.O.[O-2].[O-2].[O-2].[Al+3].[Al+3] UOCIZHQMWNPGEN-UHFFFAOYSA-N 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims 1
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
-
- 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
-
- 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
- D06N3/14—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 polyurethanes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H15/00—Tents or canopies, in general
- E04H15/32—Parts, components, construction details, accessories, interior equipment, specially adapted for tents, e.g. guy-line equipment, skirts, thresholds
- E04H15/54—Covers of tents or canopies
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
A tentage material suitable for highly adverse conditions such as encountered in military use, the tentage material comprising a polyester base fabric having an inner coating on each of first and second major faces and an outer coating on each of the first and second major faces, each of the coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica. The tentage material provides good physical characteristics along with good vapour permeability to minimize interior condensation (breathability).
Description
BREATHABLE TENT FABRIC
The present invention relates to a fabric material and more particularly, relates to a fabric material suitable for use in a tent.
BACKGROUND OF THE INVENTION
Tents are widely used in many applications and range from the relatively small light weight tents used in many recreational pursuits to the heavy duty tents such as are used by the armed forces. The present invention is concerned with the heavy duty type of tents which must withstand various adverse conditions and in particular, tents which are suitable for military use.
Initially, tent constructions were of a heavy cotton cloth commonly known as canvas. This type of tentage material was used for a number of years and was the only available material until the decade of the 1960s. While the saturated heavy cotton cloth provided the advantage of breathability of vapor and carbon dioxide in conjunction with low cost and good abrasion resistance, it only provided a minimum of waterproofness. Although various spray-on coatings were proposed for use on such tents, they were still highly susceptible to leakage.
Subsequently, it was proposed that a PVC coated polyester fiber be utilized as tentage material. This material was advantageous in that it provided a waterproof structure except at the seams. In order to overcome the problem of seam leakage, the use of flies was proposed wherein the seams were covered with a piece of waterproof material. This solved the water leakage problem and also offered certain improved physical properties and increased service life.
More recently, it has been proposed to use a PVC
blend coated onto polyester, which blend was more supple than previous versions and offered the possibility of manufacturing the tent using welded seams. This welded seam technology was advantageous in that it prevented leakage of the seams without requiring the use of the flies. However, this material did not provide required breathability and accordingly, the interior of the tent could still become wet due to condensation.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a fabric which is suitable for use in a tent, the fabric having the desired physical properties associated with tents and having improved breathability.
It is a further object of the present invention to provide a tent which is resistant to abrasion while still providing breathability.
According to one aspect of the present invention, there is provided a tentage material comprising a polyester base fabric having first and second opposed major faces, the first major face having a first major face inner coating and a first major face outer coating thereon, the second major face having a second major face inner coating and a second major face outer coating thereon, each of the inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
According to a further aspect of the present invention, there is provided a method of preparing a tentage material comprising the steps of supplying a web of a woven polyester fabric having a thickness of between 0.1 mm and 0.4 mm, coating a first face of the web with a layer of a coating system, curing the coating system, coating an opposed face of the web with a layer of the coating system, curing the second face of the web, placing a second coating on the first face of the web, curing the second coating on the first face, placing a second coating on the second face of the web, curing the second coating on the second face, the method being characterized by the coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
According to a still further aspect of the present invention, there is provided in a tent, the improvement wherein the tent includes a tentage material comprising a !, CA 02254499 1998-11-25 polyester base fabric having first and second opposed major faces, the first major face having a first major face inner coating and a first major face outer coating thereon, the second major face having a second major face inner coating and a second major face outer coating thereon, each of the inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
In greater detail, in one aspect of the present invention, there is provided tentage material which has the required breathability and other characteristics for use in severe climatic conditions. In particular, tentage material should have high durability which is closely related to abrasion resistance. In addition, the tentage material must be able to transmit moisture vapor to maintain the interior of the tent comfortable while maintaining the waterproofness of the material under severe climatic conditions.
Naturally, it will be recognized that the transmission of the water vapor is a function of several parameters including relative humidity, the total surface area of the tent vis-a-vis the number of people occupying the tent and the body vapor production rate. This in turn is dependant upon the activities performed in the tent.
Since only light work is normally performed in a tent, the evaporation rate does not need to be the same as, for example, breathable garments. Assuming that there is provided a surface exchange area of 7.5 m2 per occupant, it has been found that an evaporation rate of approximately 1,000 g/m2/day, using the test procedure ASTM E-96-E, is suitable.
The tentage material of the present invention is suitable for use in either desert or arctic climates with IR
and W camouflage protection which may be integrated in the coated fabric itself. The use of suitable materials to provide such capability is well known in the art. This allows for extremely simple and rapid installation. There is thus provided a single material which is capable of providing protection against wind, sun, dust storms, IR
scanning, W scanning, visual detection, rain, moisture and carbon dioxide build-up.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The base fabric of the present invention is preferably formed of a woven polyester fabric material and which woven polyester material preferably has a weight of between 120 g/m2 and 160 g/m2. Preferably, the polyester fabric has a thickness of between 0.1 mm and 0.4 mm and even more preferably, has a thickness of between 0.17 mm and 0.23 mm.
As aforementioned, each of the inner and outer coatings is formed of a mixture of different polymeric materials along with suitable additives.
The present invention relates to a fabric material and more particularly, relates to a fabric material suitable for use in a tent.
BACKGROUND OF THE INVENTION
Tents are widely used in many applications and range from the relatively small light weight tents used in many recreational pursuits to the heavy duty tents such as are used by the armed forces. The present invention is concerned with the heavy duty type of tents which must withstand various adverse conditions and in particular, tents which are suitable for military use.
Initially, tent constructions were of a heavy cotton cloth commonly known as canvas. This type of tentage material was used for a number of years and was the only available material until the decade of the 1960s. While the saturated heavy cotton cloth provided the advantage of breathability of vapor and carbon dioxide in conjunction with low cost and good abrasion resistance, it only provided a minimum of waterproofness. Although various spray-on coatings were proposed for use on such tents, they were still highly susceptible to leakage.
Subsequently, it was proposed that a PVC coated polyester fiber be utilized as tentage material. This material was advantageous in that it provided a waterproof structure except at the seams. In order to overcome the problem of seam leakage, the use of flies was proposed wherein the seams were covered with a piece of waterproof material. This solved the water leakage problem and also offered certain improved physical properties and increased service life.
More recently, it has been proposed to use a PVC
blend coated onto polyester, which blend was more supple than previous versions and offered the possibility of manufacturing the tent using welded seams. This welded seam technology was advantageous in that it prevented leakage of the seams without requiring the use of the flies. However, this material did not provide required breathability and accordingly, the interior of the tent could still become wet due to condensation.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a fabric which is suitable for use in a tent, the fabric having the desired physical properties associated with tents and having improved breathability.
It is a further object of the present invention to provide a tent which is resistant to abrasion while still providing breathability.
According to one aspect of the present invention, there is provided a tentage material comprising a polyester base fabric having first and second opposed major faces, the first major face having a first major face inner coating and a first major face outer coating thereon, the second major face having a second major face inner coating and a second major face outer coating thereon, each of the inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
According to a further aspect of the present invention, there is provided a method of preparing a tentage material comprising the steps of supplying a web of a woven polyester fabric having a thickness of between 0.1 mm and 0.4 mm, coating a first face of the web with a layer of a coating system, curing the coating system, coating an opposed face of the web with a layer of the coating system, curing the second face of the web, placing a second coating on the first face of the web, curing the second coating on the first face, placing a second coating on the second face of the web, curing the second coating on the second face, the method being characterized by the coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
According to a still further aspect of the present invention, there is provided in a tent, the improvement wherein the tent includes a tentage material comprising a !, CA 02254499 1998-11-25 polyester base fabric having first and second opposed major faces, the first major face having a first major face inner coating and a first major face outer coating thereon, the second major face having a second major face inner coating and a second major face outer coating thereon, each of the inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
In greater detail, in one aspect of the present invention, there is provided tentage material which has the required breathability and other characteristics for use in severe climatic conditions. In particular, tentage material should have high durability which is closely related to abrasion resistance. In addition, the tentage material must be able to transmit moisture vapor to maintain the interior of the tent comfortable while maintaining the waterproofness of the material under severe climatic conditions.
Naturally, it will be recognized that the transmission of the water vapor is a function of several parameters including relative humidity, the total surface area of the tent vis-a-vis the number of people occupying the tent and the body vapor production rate. This in turn is dependant upon the activities performed in the tent.
Since only light work is normally performed in a tent, the evaporation rate does not need to be the same as, for example, breathable garments. Assuming that there is provided a surface exchange area of 7.5 m2 per occupant, it has been found that an evaporation rate of approximately 1,000 g/m2/day, using the test procedure ASTM E-96-E, is suitable.
The tentage material of the present invention is suitable for use in either desert or arctic climates with IR
and W camouflage protection which may be integrated in the coated fabric itself. The use of suitable materials to provide such capability is well known in the art. This allows for extremely simple and rapid installation. There is thus provided a single material which is capable of providing protection against wind, sun, dust storms, IR
scanning, W scanning, visual detection, rain, moisture and carbon dioxide build-up.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The base fabric of the present invention is preferably formed of a woven polyester fabric material and which woven polyester material preferably has a weight of between 120 g/m2 and 160 g/m2. Preferably, the polyester fabric has a thickness of between 0.1 mm and 0.4 mm and even more preferably, has a thickness of between 0.17 mm and 0.23 mm.
As aforementioned, each of the inner and outer coatings is formed of a mixture of different polymeric materials along with suitable additives.
The inner coatings, as outlined above, comprise a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with acrylonitrile polymer, and diatomaceous silica (diatomaceous earth). As will be understood by those skilled in the art, other materials may be added according to the properties desired. Typical additives would include fire retardant agents, UV agents, etc.
The inner coatings applied to the opposite faces of the polyester base fabric are applied to preferably provide a thickness of between 0.025 mm and 0.06 mm and even more preferably, a thickness of between 0.033 mm and 0.043 mm.
These thicknesses will of course determine various properties of the material including vapor transmission rates.
The outer coatings are also applied to the previously coated base fabric such that the outer coatings will have a thickness of between 0.025 mm and 0.06 mm and even more preferably, between about 0.033 mm and about 0.043 mm.
The outer coating, like the inner coating, is a blend of different polymeric materials and additives thereto. In a preferred embodiment, the outer coating includes between about 8% and about 40% by weight of a water based low Tg styrene/acrylic copolymer dispersion;
between about 5% and about 60% by weight of a fully reacted aliphatic polyurethane dispersed in water; between about 1%
and about 40% by weight of a water based low Tg styrene/acrylic copolymer with acrylonitrile; and between about 5% and about 30% by weight of diatomaceous silica.
Naturally, other components such as fire retardant agents and the like can be added. The fire retardant agents may be those such as antimony trioxide and aluminum oxide trihydrate. In one particular embodiment, one may utilize a polyurethane which is premixed with fire retardant agents.
The polyester fabric may be coated in any conventional manner. Preferably, the coating process is a two step process in which the inner and outer coatings are spread onto the polyester base fabric. It may be coated in a single doctor blading system wherein the base fabric is put onto a feed reel situated near the doctor blade which is placed over a coating roll. The coating roll supports the fabric as it passes through the doctor blade apparatus. A
liquid delivery system allows the desired coating to be spread on the fabric in front of the doctor blade apparatus and then the adjustable doctor blade is positioned to the desired height and spreads the compound onto the base fabric when it passes under the blade.
Subsequently, the coated fabric will pass through a curing oven wherein there are provided first and second stages, the first curing stage driving off volatile substances with the second stage providing the proper cure of the coating. Optionally, the coated base fabric may be pressed in a calander system and then wound onto a take-up reel. The process is then repeated for the other side of the fabric.
Having thus generally described the invention, reference will be made to the following example illustrating an embodiment thereof.
Example 1 The following coating compounds were prepared.
Inner Coating Outer Coating Water based low Tg 18 32 styrene/acrylic copolymer j dispersion Fully reacted aliphatic 10 28 polyurethane dispersed in water Water based low Tg 29 3 styrene/acrylic copolymer with acrylonitrile Diatomaceous earth 18 15 Antimony trioxide 15.5 13.5 Aluminum oxide trihydrate 9.5 8.5 _ g _ A woven polyester fabric having a weight of 142 g/m2 and a thickness of 0.2 mm is put onto a feed reel and then passed through a series of tension rollers to a single doctor blading system. The doctor blade is placed over a coating roll which supports the fabric as it passes therethrough. A coating delivery system provides the inner coating set forth above to the fabric in front of the doctor blade. The doctor blade was set to provide a coating of 28 kg/100 m2. The inner coating is then cured at a temperature of 170oC and the surface calandered with cold pressure rolls. The fabric is then wound onto a take-up reel. The take-up reel is brought to the front of the machine and becomes the feed reel so that the opposite side of the polyester fabric is coated. The second inner coat is applied to the second side of the polyester fabric.
Subsequently, the process is repeated to provide an outer coating on each side of the fabric. For the outer coating, the doctor blade is set to a height sufficient to provide 22 kg/100m2 of the outer coating compound set forth above on the fabric. The outer coating is cured at a temperature of 135oC.
The coated fabric is subjected to a visual inspection which shows a smooth coating with an absence of surface defects.
The coated material was tested as follows.
_ g Test Method Results Breathability ASTM between 1 000 to E96BW 1,300 g/m~/day C02 vapor 100,000 cc/m2/day transmission Breaking Fed. std. 1,600 N (warp direction) strength 191. 5100 1,100N (filler direction) Tear strength ASTM 90 N (warp direction) D1424 65 N (filling direction) Flame resistance Fed. std. self extinguishing method 5903 There is thus provided a tentage material having the required mechanical strength along with b>~eathability.
It will be understood that the above described embodiment is for purposes of illustration only and that changes and modifications may be made thereto without departing from the spirit and scope of the invention.
The inner coatings applied to the opposite faces of the polyester base fabric are applied to preferably provide a thickness of between 0.025 mm and 0.06 mm and even more preferably, a thickness of between 0.033 mm and 0.043 mm.
These thicknesses will of course determine various properties of the material including vapor transmission rates.
The outer coatings are also applied to the previously coated base fabric such that the outer coatings will have a thickness of between 0.025 mm and 0.06 mm and even more preferably, between about 0.033 mm and about 0.043 mm.
The outer coating, like the inner coating, is a blend of different polymeric materials and additives thereto. In a preferred embodiment, the outer coating includes between about 8% and about 40% by weight of a water based low Tg styrene/acrylic copolymer dispersion;
between about 5% and about 60% by weight of a fully reacted aliphatic polyurethane dispersed in water; between about 1%
and about 40% by weight of a water based low Tg styrene/acrylic copolymer with acrylonitrile; and between about 5% and about 30% by weight of diatomaceous silica.
Naturally, other components such as fire retardant agents and the like can be added. The fire retardant agents may be those such as antimony trioxide and aluminum oxide trihydrate. In one particular embodiment, one may utilize a polyurethane which is premixed with fire retardant agents.
The polyester fabric may be coated in any conventional manner. Preferably, the coating process is a two step process in which the inner and outer coatings are spread onto the polyester base fabric. It may be coated in a single doctor blading system wherein the base fabric is put onto a feed reel situated near the doctor blade which is placed over a coating roll. The coating roll supports the fabric as it passes through the doctor blade apparatus. A
liquid delivery system allows the desired coating to be spread on the fabric in front of the doctor blade apparatus and then the adjustable doctor blade is positioned to the desired height and spreads the compound onto the base fabric when it passes under the blade.
Subsequently, the coated fabric will pass through a curing oven wherein there are provided first and second stages, the first curing stage driving off volatile substances with the second stage providing the proper cure of the coating. Optionally, the coated base fabric may be pressed in a calander system and then wound onto a take-up reel. The process is then repeated for the other side of the fabric.
Having thus generally described the invention, reference will be made to the following example illustrating an embodiment thereof.
Example 1 The following coating compounds were prepared.
Inner Coating Outer Coating Water based low Tg 18 32 styrene/acrylic copolymer j dispersion Fully reacted aliphatic 10 28 polyurethane dispersed in water Water based low Tg 29 3 styrene/acrylic copolymer with acrylonitrile Diatomaceous earth 18 15 Antimony trioxide 15.5 13.5 Aluminum oxide trihydrate 9.5 8.5 _ g _ A woven polyester fabric having a weight of 142 g/m2 and a thickness of 0.2 mm is put onto a feed reel and then passed through a series of tension rollers to a single doctor blading system. The doctor blade is placed over a coating roll which supports the fabric as it passes therethrough. A coating delivery system provides the inner coating set forth above to the fabric in front of the doctor blade. The doctor blade was set to provide a coating of 28 kg/100 m2. The inner coating is then cured at a temperature of 170oC and the surface calandered with cold pressure rolls. The fabric is then wound onto a take-up reel. The take-up reel is brought to the front of the machine and becomes the feed reel so that the opposite side of the polyester fabric is coated. The second inner coat is applied to the second side of the polyester fabric.
Subsequently, the process is repeated to provide an outer coating on each side of the fabric. For the outer coating, the doctor blade is set to a height sufficient to provide 22 kg/100m2 of the outer coating compound set forth above on the fabric. The outer coating is cured at a temperature of 135oC.
The coated fabric is subjected to a visual inspection which shows a smooth coating with an absence of surface defects.
The coated material was tested as follows.
_ g Test Method Results Breathability ASTM between 1 000 to E96BW 1,300 g/m~/day C02 vapor 100,000 cc/m2/day transmission Breaking Fed. std. 1,600 N (warp direction) strength 191. 5100 1,100N (filler direction) Tear strength ASTM 90 N (warp direction) D1424 65 N (filling direction) Flame resistance Fed. std. self extinguishing method 5903 There is thus provided a tentage material having the required mechanical strength along with b>~eathability.
It will be understood that the above described embodiment is for purposes of illustration only and that changes and modifications may be made thereto without departing from the spirit and scope of the invention.
Claims (14)
1. A tentage material comprising a polyester base fabric having first and second opposed major faces, said first major face having a first major face inner coating and a first major face outer coating thereon, said second major face having a second major face inner coating and a second major face outer coating thereon, each of said inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
2. The tentage material of Claim 1 wherein said polyester base fabric has a thickness of between 0.1 mm and 0.4 mm.
3. The tentage material of Claim 2 wherein said polyester base fabric has a thickness of between 0.17 mm and 0.23 mm.
4. The tentage material of Claim 2 wherein each of said first major face inner coating and said second major face inner coating has a thickness of between 0.025 mm and 0.06 mm.
5. The tentage material of Claim 4 wherein each of said thicknesses of said inner coatings is between 0.033 mm and 0.043 mm.
6. The tentage material of Claim 1 wherein each of said first major face outer coating and said second major face outer coating has a thickness of between 0.025 mm and 0.06 mm.
7. The tentage material of Claim 6 wherein each of said thicknesses of said outer coatings is between 0.033 mm and 0.043 mm.
8. The tentage material of Claim 1 further including a flame retardant material in said mixture.
9. The tentage material of Claim 8 wherein said fire retardant material comprises antimony trioxide and aluminum oxide trihydrate.
10. The tentage material of Claim 1 wherein each of said first major face inner coating and said second major face inner coating comprises between 8% and 40% by weight of said low Tg styrene/acrylic copolymer dispersion; between about 5% and about 35% by weight of said fully reacted aliphatic polyurethane; between about 2% and about 50% by weight of said low Tg styrene/acrylic copolymer with acrylonitrile polymer; and between about 5% and 30% by weight of said diatomaceous silica.
11. The tentage material of Claim 1 wherein each of said first major face outer coating and said second major face outer coating comprises between about 8% to about 40%
by weight of said low Tg styrene/acrylic copolymer dispersion; between about 5% and 60% by weight of said fully reacted aliphatic polyurethane; between about 1% and 40% by weight of said low Tg styrene/acrylic copolymer with acrylonitrile polymer; and between about 5% to about 30% by weight of said diatomaceous silica.
by weight of said low Tg styrene/acrylic copolymer dispersion; between about 5% and 60% by weight of said fully reacted aliphatic polyurethane; between about 1% and 40% by weight of said low Tg styrene/acrylic copolymer with acrylonitrile polymer; and between about 5% to about 30% by weight of said diatomaceous silica.
12. The tentage material of Claim 1 wherein said polyester base fabric comprises a woven polyester material having a weight of between 120 g/m2 and 160 g/m2.
13. A method of preparing a tentage material comprising the steps of supplying a web of a woven polyester fabric having a thickness of between 0.1 mm and 0.4 mm, coating a first face of said web with a layer of a coating system, curing said coating system, coating an opposed face of said web with a layer of said coating system, curing said second face of said web, placing a second coating on said first face of said web, curing said second coating on said first face, placing a second coating on said second face of said web, curing said second coating on said second face, the method being characterized by said coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
14. In a tent, the improvement wherein said tent includes a tentage material comprising a polyester base fabric having first and second opposed major faces, said first major face having a first major face inner coating and a first major face outer coating thereon, said second major face having a second major face inner coating and a second major face outer coating thereon, each of said inner and outer coatings being comprised of a mixture of a water based low Tg styrene/acrylic copolymer dispersion, a fully reacted aliphatic polyurethane dispersed in water, a water based low Tg styrene/acrylic copolymer with an acrylonitrile polymer, and diatomaceous silica.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002254499A CA2254499A1 (en) | 1998-11-25 | 1998-11-25 | Breathable tent fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002254499A CA2254499A1 (en) | 1998-11-25 | 1998-11-25 | Breathable tent fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2254499A1 true CA2254499A1 (en) | 2000-05-25 |
Family
ID=29425720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002254499A Abandoned CA2254499A1 (en) | 1998-11-25 | 1998-11-25 | Breathable tent fabric |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2254499A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1025575C2 (en) * | 2004-02-26 | 2005-11-15 | Mr Chun Wei Lin | Composite textile with a polymeric support laminate. |
-
1998
- 1998-11-25 CA CA002254499A patent/CA2254499A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1025575C2 (en) * | 2004-02-26 | 2005-11-15 | Mr Chun Wei Lin | Composite textile with a polymeric support laminate. |
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| FZDE | Discontinued | ||
| FZDE | Discontinued |
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| FZDE | Discontinued |
Effective date: 20021125 |