EP0087537A2 - Dampfdurchlässiges, wasserundurchlässiges beschichtetes Textilmaterial - Google Patents

Dampfdurchlässiges, wasserundurchlässiges beschichtetes Textilmaterial Download PDF

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Publication number
EP0087537A2
EP0087537A2 EP82307031A EP82307031A EP0087537A2 EP 0087537 A2 EP0087537 A2 EP 0087537A2 EP 82307031 A EP82307031 A EP 82307031A EP 82307031 A EP82307031 A EP 82307031A EP 0087537 A2 EP0087537 A2 EP 0087537A2
Authority
EP
European Patent Office
Prior art keywords
fabric
water
moisture
coated fabric
permeable
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.)
Ceased
Application number
EP82307031A
Other languages
English (en)
French (fr)
Other versions
EP0087537A3 (de
Inventor
Atsumi Morioka
Yasushi Naka
Akira Uchida
Kiyoshi Kawakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Publication of EP0087537A2 publication Critical patent/EP0087537A2/de
Publication of EP0087537A3 publication Critical patent/EP0087537A3/de
Ceased legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a moisture-permeable, water leak-preventive coated fabric. More particularly, it is concerned with a moisture-permeable, water leak-preventive coated fabric having superior drapability and an excellent moisture permeability, a certain amount of air permeability and a durable water-proofness or water leak-preventiveness.
  • waterproof coated fabrics have heretofore been made public and practically used.
  • waterproof fabrics coated with a natural or synthetic rubber are practically used for raincoats and other waterproof clothing, tents, tarpaulins and other products. But all of them are less moisture-permeable; for example, waterproof clothes used as raincoats give an unpleasant feeling in wear due to stuffiness, and in the case of tents or the like there should be clear default of vapor being condensed on the interior surface thereof in their practical use.
  • a coated waterproof fabric having air- and moisture-permeability there has recently been proposed and practically used a fabric coated with a microporous polyurethane layer or a fabric coated with a porous layer obtained by using a synthetic resin or synthetic rubber with various foaming agents or the like added.
  • the former is not satisfactory in its water-proofness, and the latter is insufficient in its air- and moisture-permeability, and thus a further improvement has being desired.
  • the present inventors have previously developed a fabric coated with a microporous polyurethane layer having new structural characteristics superior not only in air- and moisture-permeability but also in water-proofness with a water entry pressure not lower than 700 mmH 2 0/cm 2. But this fabric involves problems, for example, its surface water repellency is deteriorated due to its use for a long period of time or contamination, and its resistance to water washing is not satisfactory.
  • a coated fabric comprising a base fabric having on at least one surface thereof a microporous layer formed of a synthetic polymer consisting essentially of a polyurethane, said coated fabric having a water entry pressure of not lower than 700 mmH 2 O/cm 2 , a moisture-permeability of not less than 4,000 g/m 2 ⁇ 24 hrs. and a water leak resistance index at the back of the fabric after an artificial rainfall test of not less than 50.
  • the coated fabric of the present invention has a structural characteristic such that it has a microporous layer formed of a synthetic polymer consisting essentially of a polyurethane, said layer having on its surface a large number of fine pores, also having in its interior relatively large-sized cavities communicating with those fine pores and further having a communication hole formed at least in part of the partition wall between adjacent cavities, wherein a water repellent agent adheres even to the wall surfaces of those cavities.
  • the fine pores on the surface have an average diameter usually not larger than 5 microns, for example, not larger than 1 micron, and the inside cavities usually have a diameter not less than three times the diameter of the fine pores.
  • coated fabric of the present invention having such characteristics is preferably produced in the following manner.
  • a coating solution prepared by adding water repellent agent, a nonionic surfactant and a polyisocyanate into a polar organic solvent solution with a polymer consisting essentially of a polyurethane dissolved therein is applied to a base fabric, which is then subjected to wet coagulation in a coagulating bath, and the resulting coated fabric is treated with a solution of a water repellent agent dissolved in an organic solvent, then dried and heat-treated.
  • the polyurethane used in the preparation of the coating solution there may be used a polyester type polyurethane elastomer, a polyether type polyurethane elastomer, or the like, with a concentration preferably in the range of 8 to 25% by weight.
  • the polar organic solvent essentially there may be used any polar organic solvent if only it can dissolve the polyurethane, and usually a known polar organic solvent is used such as dimethylformamide and dimethyl sulfoxide.
  • the water repellent agent which is added as an essential component to the coating solution, one having affinity for the polyurethane is preferred, for example, a fluorine- or silicone-based water repellent agent.
  • the concentration of the water repellent agent in the coating solution is preferably not less than 1.0% by weight and more preferably in the range of 2 to 10X by weight.
  • an organic compound having two or more isocyanate groups such as a di- or triisocyanate; for example, it may be selected optionally from diisocyanates such as 2,4-(2,6-) tolylene diisocyanate, diphenylmethane 4,4'-diisocyanate, 1,4-naphthalene diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate, and triisocyanates resulting from the addition reaction of 3 moles of these diisocyanates and 1 mole of compounds having three active hydrogens such as trimethylolpropane or glycerin.
  • polyisocyanates may also have their isocyanate groups in a free form or in a stabilized form with added phenol, etc.
  • the polyisocyanate is added to the coating solution in an amount preferably ranging from 0.2 to 3X by weight.
  • the polyisocyanate contributes to the improvement of adhesive property between the water repellent agent and the microporous polyurethane layer.
  • nonionic surfactant which is preferably added to the coating solution
  • nonionic surfactant there may be used any of commercially available ones, but especially a nonionic surfactant comprising a block copolymer of polypropylene glycol and polyethylene glycol affords a good result.
  • the nonionic surfactant functions to enhance the compatibility of the components in the coating solution and control the coagulating action in the coagulating operation.
  • the concentration of the nonionic surfactant is preferably in the.range of 1 to 8% by weight.
  • a pigment or the like may be added to the coating solution, if required.
  • the coating solution is applied to the base fabric uniformly in a desired thickness by means of a knife-over-roll coater or other conventional coating machine.
  • the coating solution may be applied directly to at least one face of the base fabric.
  • the base fabric is preferably pre-treated with a view to improving the moisture-permeability, handling of the fabric adhesive property between the microporous layer and the base fabric.
  • the pre-treatment there may be adopted a method wherein the face of the base fabric to be coated with the coating solution is heated and pressurized by calendering or some other suitable means thereby allowing the fibers to be transformed in section so as to become more narrowly spaced from each other; a method involving application of a water repellent agent to the base fabric; or a method wherein a synthetic polymer different from the polyurethane in the coating solution, especially one having a adhesive function,is applied to the base fabric partially in a dotted or linear form.
  • the synthetic polymer For such partial application of the synthetic polymer, there may be adopted a known method such as the dotted coating roller system or the spray system.
  • a known method such as the dotted coating roller system or the spray system.
  • the synthetic polymer one having an adhesive force and being difficult to dissolve or insoluble in the polar organic solvent is preferred, and usually an acrylic polymer incorporating a crosslinking agent is employed.
  • a polyisocyanate is incorporated in the synthetic polymer. It is desirable that said synthetic polymer is applied to the base fabric in an area of 20 to 80% of the surface of the base fabric. Such a pre-treatment functions to suppress the permeation of the coating solution into the base fabric to about one-third or less of the thickness of the base fabric, whereby there is obtained a coated fabric having a drape handling of fabric, a high moisture- and air-permeability and a high peeling strength.
  • the fabric After applying the coating solution to the base fabric thus pre-treated or not so treated, the fabric is immersed in a coagulating bath to allow coagulation to take place, then washed with water and dried to obtain a coated fabric.
  • a coagulating bath there preferably is used water containing a small amount, say. 1 to 10% by weight, of the polar organic solvent as a component of the coating solution.
  • the coated fabric having the microporous layer thus obtained is then immersed in an organic solvent solution with a water repellent agent dissolved therein to allow the water repellent agent to fully permeate the interior of the fine pores, then dried and preferably heat-treated at a temperature of, for example, about 100° to 170°C.
  • a fluorine- or silicone-based water repellent agent is preferred, and as the organic solvent there may be used any organic solvent if only it can dissolve the water repellent agent without dissolving the polyurethane layer, for example, trichlene, perchlene, or a mixture consisting mainly thereof and partially containing toluene as a diluent.
  • the concentration of the water repellent agent in the solution is not less than 0.05% by weight and preferably in the range of 0.5 to 5% by weight. In the case of treating the coated fabric with a mangle or the like, it is desirable to squeeze it to a pickup ratio of 20 to 100%, whereby a high water leak-preventiveness beyond expectation is imparted to the fabric.
  • the base fabric there may be used, for example, a woven, non-woven or knitted fabric made of natural fibers such as cotton, silk or wool, chemical fibers such as cellulose, viscose rayon or cupra, synthetic fibers such as polyamide, polyester or acrylic fibers, or even filament yarn, spun yarn, blended spun yarn, or mixed fabric thereof.
  • natural fibers such as cotton, silk or wool
  • chemical fibers such as cellulose, viscose rayon or cupra
  • synthetic fibers such as polyamide, polyester or acrylic fibers, or even filament yarn, spun yarn, blended spun yarn, or mixed fabric thereof.
  • a moisture-permeable and water leak-preventive coated fabric having a water entry pressure of not lower than 700 mmH 2 O/cm 2 , a moisture-permeability of not less than 4,000 g/m 2 ' 24 hrs., .a leak water amount on the back surface of said fabric after an artificial rainfall test of substantially zero c.c., a surface leak resistance value at the back of the fabric of not less than 5 x 10 6 ⁇ /5mm and a water leak resistance index of not less than 50.
  • the leak water amount, the surface leak resistance value and the water leak resistance index as referred to herein are measured in the manner described below.
  • Fig.l is an illustrative view of the artificial rainfall test.
  • the artificial rainfall test used in the present invention comprises a rainfall test conducted for a period of 2 hours at the rain intensity of 550 m/hr according to JIS L-1092 (BUNDESMANN TEST).
  • the leak water amount As to the leak water amount, the volume (c.c.) of water leaked out to the back of the fabric after the artificial rainfall test mentioned above and collected in a beaker is measured and the value thus measured corresponds to the leak water amount.
  • a circle 10 cm in diameter 2 is drawn on the back surface of the fabric 1 before the artificial rainfall test and a 7 x 7 cm square is drawn in said circle, which square is then subdivided into 49 squares each of which having 1 x 1 cm square.
  • the surface leak resistance value in each of those subdivided squares is measured by using, for example, a multi-tester Model A-303TRD (a product of Sanwa Keiki Seisakusho) 3 while fixing its inter-detecting portion distance to 5 mm and contacting it with any desired point in each square to measure the electric resistance.
  • the value 5 x 10 6 ⁇ /5mm is taken as a reference resistance value representative of a leak water-free state, and values above this reference value are judged to indicate the absence of leak water.
  • the present invention provides the coated fabric having a water leak resistance index of not less than 50, preferably not less than 80 .
  • a coating solution prepared by dissolving 20 parts by weight of a polyester type polyurethane elastomer, 4 parts by weight of a fluorine-based water repellent agent and 4 parts by weight of a pore controller in 72 parts by weight of dimethylformamide was applied to the above-treated base fabric in an amount of 150 g/m 2 (wet) by means of a knife-over-roll coater. Then, the base fabric was immersed in a water bath containing 5% by weight of dimethylformamide, allowed to coagulate, washed with water and then dried to obtain a coated fabric having fine pores.
  • the coated fabric was immersed in a trichlene solution containing 0.5% by weight of a fluorine-based water repellent agent, then squeezed by a mangle to a pickup of 80%, then dried and heat-treated at 150°C for 10 minutes to give a water leak-preventive, moisture-permeable coated fabric having the characteristics shown in Table 1.
  • the coated fabric having fine pores produced in the same process as described above except immersing into trichlene with water repellent agent was immersed in a water dispersion containing 0.5% by weight of a fluorine-based water repellent agent, then in the same manner as above, squeezed, dried and heat-treated at 150°C for 10 minutes. Characteristics of the coated fabric thus treated are shown in Table 1 as Comparative Example A.
  • a coated fabric having fine pores was obtained in the same way as in the above Example except that in place of the polyurethane coating solution used in the above Example there was employed a coating solution prepared by dissolving 20 parts by weight of a polyester type polyurethane elastomer and 4 parts by weight of a pore controller in 76 parts by weight of dimethylformamide without using the fluorine-based water repellent agent.
  • the coated fabric was then immersed in a water dispersion containing 0.5% by weight of a silicone-based water repellent agent, then squeezed by a mangle to a pickup of 50%, followed by drying and subsequent heat treatment at 140°C for 10 minutes. Characteristics of the coated fabric thus treated are shown in Table 1 as Comparative

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
EP82307031A 1982-02-22 1982-12-22 Dampfdurchlässiges, wasserundurchlässiges beschichtetes Textilmaterial Ceased EP0087537A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2614982A JPS58144178A (ja) 1982-02-22 1982-02-22 透湿性、耐漏水性コ−テイング生地
JP26149/82 1982-02-22

Publications (2)

Publication Number Publication Date
EP0087537A2 true EP0087537A2 (de) 1983-09-07
EP0087537A3 EP0087537A3 (de) 1984-07-11

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Family Applications (1)

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EP82307031A Ceased EP0087537A3 (de) 1982-02-22 1982-12-22 Dampfdurchlässiges, wasserundurchlässiges beschichtetes Textilmaterial

Country Status (2)

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EP (1) EP0087537A3 (de)
JP (1) JPS58144178A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003763A1 (de) * 1990-02-08 1991-08-14 Ruiter Ernest De Wasserdampfdurchlaessige, wasserdichte schutzhandschuhe
CN116856181A (zh) * 2023-06-29 2023-10-10 涡阳县莉佰惠服饰有限公司 一种高强度防水透湿面料及其制备方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60196336A (ja) * 1984-03-19 1985-10-04 東レ株式会社 防水性・透湿性コ−ティング生地
JPS61138778A (ja) * 1984-12-07 1986-06-26 Unitika Ltd 透湿性防水布帛およびその製造方法
JPH0627216B2 (ja) * 1984-12-11 1994-04-13 ジャパンゴアテックス株式会社 伸縮性をもった衣料用透湿防水性フィルム
JPH01156579A (ja) * 1987-12-14 1989-06-20 Kanebo Ltd コーティング織物の製造方法
JPH06293116A (ja) * 1992-05-07 1994-10-21 Asahi Chem Ind Co Ltd 複合材料及びその製造方法
US5753568A (en) * 1993-04-28 1998-05-19 Komatsu Seiren Co., Ltd. Moisture-permeable, waterproof fabric and its production process
EP0648889B1 (de) * 1993-04-28 1998-08-19 Komatsu Seiren Co., Ltd. Feuchtigkeitdurchlässiges wasserundurchlässiges gewebe und verfahren zur herstellung desselben
JP4859297B2 (ja) * 2001-07-26 2012-01-25 パイロットインキ株式会社 水変色性シートの製造方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1694059C3 (de) * 1966-01-03 1974-02-28 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von mikroporösen, wasserdampfdurchlässigen Flächengebilden
US3484273A (en) * 1966-01-14 1969-12-16 Kanebo Ltd Method for making porous sheet material
US3544357A (en) * 1966-05-27 1970-12-01 Kuraray Co Method of manufacturing soft and flexible sheet materials
JPS5134514A (ja) * 1974-09-14 1976-03-24 Nippon Asbestos Co Ltd Tetsukotsukenchikuniokeru hari hashira no taikakeshohifukukoho
JPS51126220A (en) * 1975-04-25 1976-11-04 Asahi Glass Co Ltd A composition suitable fos use in forming coats on smooth surfaces
JPS6047954B2 (ja) * 1978-12-06 1985-10-24 東レ株式会社 コ−テイング布帛およびその製造方法
JPS6047955B2 (ja) * 1979-08-02 1985-10-24 東レ株式会社 透湿性、防水性コーテイング生地
JPS5789671A (en) * 1980-11-17 1982-06-04 Teijin Ltd Production of permeable water-proofing fabric with excellent durability
JPS6022103A (ja) * 1983-07-18 1985-02-04 New Japan Radio Co Ltd 伝送ケ−ブル
JPS6047955A (ja) * 1983-08-25 1985-03-15 Tokyo Yogyo Co Ltd 高温水素センサ−素子の製造方法
JPH0617890B2 (ja) * 1983-08-26 1994-03-09 株式会社東芝 溶存酸素濃度測定装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003763A1 (de) * 1990-02-08 1991-08-14 Ruiter Ernest De Wasserdampfdurchlaessige, wasserdichte schutzhandschuhe
CN116856181A (zh) * 2023-06-29 2023-10-10 涡阳县莉佰惠服饰有限公司 一种高强度防水透湿面料及其制备方法

Also Published As

Publication number Publication date
EP0087537A3 (de) 1984-07-11
JPS58144178A (ja) 1983-08-27
JPS619431B2 (de) 1986-03-24

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Inventor name: NAKA, YASUSHI