CN1785656A - Preparation method of composite film of poly tetrafluoro ethylene and thermoplastic polyurethane - Google Patents
Preparation method of composite film of poly tetrafluoro ethylene and thermoplastic polyurethane Download PDFInfo
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- CN1785656A CN1785656A CN 200510061827 CN200510061827A CN1785656A CN 1785656 A CN1785656 A CN 1785656A CN 200510061827 CN200510061827 CN 200510061827 CN 200510061827 A CN200510061827 A CN 200510061827A CN 1785656 A CN1785656 A CN 1785656A
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Abstract
A process for preparing the composite teflon-thermoplastic polyurethane film used for insulating underwear, sports clothes, etc includes such steps as preparing the defatted basic band from superfine teflon powder, steaming it, extruding out the thermoplastic moisture-permeable polyurethane and coating it on said basic band, stretching at 80-170 deg.C, and fixating sizes at 300-380 deg.C. It has high moisture and air permeability and water-proof power.
Description
Technical field
The present invention relates to the preparation method of a kind of polytetrafluoroethylene (PTFE) and thermoplastic polyurethane laminated film.
Background technology
Polytetrafluoroethylmicroporous microporous membrane integrates waterproof, saturating multiple function such as wet, windproof, warming.Traditional biaxial tension polytetrafluoroethylene film prepares by the following method:
Ptfe micropowder ten lubricants → mix → sieve → maturation → pressed compact → pushing → calendering (preparation base band) → longitudinal stretching (preparation degreasing base band) → cross directional stretch → curing → finished product polytetrafluoroethylene film
Adopt 5～50 microns of the film thicknesses of above traditional handicraft processing, 0.3～5 micron in aperture, going up per square inch has 9,000,000,000 micropores approximately, and percent opening is up to more than 80%.Polytetrafluoroethylene film wears no resistance, and microporous morphosis is subject to the pollution of grease in dust and the sweat, and is blocking microporous, causes water vapour permeability to descend.The above performance deficiency of film is that self character causes.For this reason, all adopt following method to overcome above problem both at home and abroad:
Lining and polytetrafluoroethylene film be bonding → form polyurethane film at polytetrafluoroethylene (PTFE) side coating polyurethane solutions → oven dry back coating agent, with the protection polytetrafluoroethylene film.
There is following problem in this technology: in coating procedure, the solvent in the coating agent (dimethyl formamide, butanone etc.) sees through polytetrafluoroethylene film easily, can strip to dyestuff behind the contact fabric, causes the lining fault, reduces the integral fabric hydrostatic pressing simultaneously.For this reason, we have invented the method for common stretching, and application patent of invention " stretch the jointly preparation method of composite membrane of polyurethane/polytetrafluoroethylene (PTFE), application number 03100830.5; Publication number: CN1519094A).This technology is to adopt thermoplastic polyurethane, by its solution of blade coating, or extrudes molten being coated on the polytetrafluoroethylene (PTFE) degreasing base band.Under 50～300 ℃ temperature, on expander, stretch jointly then, after polyurethane/polytetrafluoroethylcomposite composite film is processed in 200～400 ℃ of typings.Need not carry out the polyurethane solutions coating again after last and lining is compound, can directly use as functional fabric.In process of production, especially adopt polyurethane to extrude molten coating method, the bonding not good problem of polyurethane and polytetrafluoroethylene (PTFE) degreasing base band often occurs, the bonding intensity that this will reduce polyurethane and polytetrafluoroethylene (PTFE) two interlayers in the product film finally influences serviceability.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of polytetrafluoroethylene (PTFE) and thermoplastic polyurethane laminated film improves bonding fastness between polyurethane and the polytetrafluoroethylene (PTFE) degreasing base band.
The technical solution adopted for the present invention to solve the technical problems is to comprise the steps:
(1) batch mixing: with teflon resin powder, fluid lubricant is 1: 0.2～0.28 mixing by weight, under 20～40 ℃ temperature, left standstill 96～144 hours, under 40～80 ℃ temperature, left standstill 10～16 hours then, toner is fully mixed with fluid lubricant, form the polytetrafluoroethylene (PTFE) material;
(2) pressed compact and calendering: described polytetrafluoroethylene (PTFE) material is pressed into cylindrical blank on harder under 20～30 ℃, blank is extruded club by the pushing machine under 40～60 ℃ temperature, under 40～60 ℃, roll into the polytetrafluoroethylene (PTFE) base band through calender then;
(3) longitudinal stretching: with described polytetrafluoroethylene (PTFE) base band longitudinal stretching in 180～300 ℃ of baking ovens, obtain polytetrafluoroethylene (PTFE) degreasing base band, its thickness is 50～80 microns;
(4), obtain polytetrafluoroethylene (PTFE) decatize degreasing base band with polytetrafluoroethylene (PTFE) degreasing base band decatize in water vapour;
(5) with the polyurethane particles material drier inner drying 1～5 hour, baking temperature is 80～140 ℃, utilizes in the extruder that has board-like die head then and extrudes polyurethane sheet, thickness is 15～20 microns; By draw-gear it is entered between polyurethane sheet and the rubber backer roll polytetrafluoroethylene (PTFE) decatize degreasing base band, control backer roll pressure, polyurethane sheet and described polytetrafluoroethylene (PTFE) decatize degreasing base band are fit together, carry out the air cooling processing then, make PTFE base and thermoplastic polyurethane tape;
(6) cross directional stretch and thermal finalization: with polytetrafluoroethylene (PTFE) base band and polyurethane material under 80～170 ℃ on the polytetrafluoroethylene (PTFE) expander common cross directional stretch, then on surface temperature is 300～380 ℃ hot-rolling, the typing of poly tetrafluoroethylene contact hot-rolling sintering, sintering time 5～16 seconds promptly obtains polytetrafluoroethylene (PTFE) and polyurethane composite membrane.
The steam temperature of described polytetrafluoroethylene (PTFE) degreasing base band is 90～120 ℃, and steaming time is 30 minutes～15 hours.
Described polyurethane particles material is thermoplasticity and moisture permeability material.Can adopt the commercially available prod, as 58245 of U.S. promise reputation company;
In described polytetrafluoroethylene (PTFE) and the polyurethane composite membrane, polytetrafluoroethylene (PTFE) thickness is 16～30 microns, and polyurethane thickness is 2.4～3 microns.
Described fluid lubricant is atoleine or kerosene.
The degree of crystallinity of described teflon resin powder is 98～99.9%, molecular weight is 2,000,000～10,000,000.Can adopt the commercially available prod, as the product of the F106 of Daikin company, the CD123 of Japan AGC company;
The beneficial effect that the present invention has is:
Testing respectively by the polytetrafluoroethylene (PTFE) of method for preparing of the present invention and vapor transfer rate, water pressure resistance, the Air permenbility of polyurethane composite membrane according to dry agar diffusion method, GB4744-84, GB5455-85 among the GB/T12704-91, is 10632～12300 grams/square metres 24 hours, 72～180 kPas, 2015～3219 milliliters of/square metre seconds.Preparation technology of the present invention is simple, cost is low.This film directly with woven cloth, looped fabric or non-weaving cloth by adhesive compound after, can be widely used in cold-proof underwear, gym suit, insulated cold wear, footwear boots, tent etc., have remarkable economic efficiency and social benefit.
The specific embodiment
Embodiment 1:
(1) batch mixing: teflon resin powder (F106 of Daikin company), atoleine are mixed according to 1: 0.2 weight ratio, under 20 ℃ temperature, left standstill 96 hours, under 40 ℃ temperature, left standstill 10 hours then, toner is fully mixed with fluid lubricant, form the polytetrafluoroethylene (PTFE) material;
(2) pressed compact and calendering: described polytetrafluoroethylene (PTFE) material is pressed into cylindrical blank under 20 ℃, blank is extruded club by the pushing machine on harder under 40 ℃ temperature, under 40 ℃, roll into the polytetrafluoroethylene (PTFE) base band through calender then;
(3) longitudinal stretching:, obtain polytetrafluoroethylene (PTFE) degreasing base band with described polytetrafluoroethylene (PTFE) base band longitudinal stretching in 180 ℃ of baking ovens;
The thickness of described polytetrafluoroethylene (PTFE) degreasing base band is 50 microns.
(4) with described polytetrafluoroethylene (PTFE) degreasing base band decatize 30 minutes in water vapour, steam temperature is 90 ℃, obtains polytetrafluoroethylene (PTFE) decatize degreasing base band;
(5) with polyurethane particles material (U.S. promise reputation company 58245) drier inner drying 3 hours, baking temperature is 120 ℃.Utilize in the extruder that has board-like die head then and extrude polyurethane sheet, by draw-gear it is entered between polyurethane sheet and the rubber backer roll described polytetrafluoroethylene (PTFE) decatize degreasing base band, control described backer roll pressure, polyurethane sheet and described polytetrafluoroethylene (PTFE) decatize degreasing base band are fit together, carry out the air cooling processing then, make polytetrafluoroethylene (PTFE) base band/polyurethane material;
Described polyurethane sheet thickness is 15 microns;
(6) cross directional stretch and thermal finalization: with described polytetrafluoroethylene (PTFE) base band/polyurethane material under 80 ℃ on the polytetrafluoroethylene (PTFE) expander common cross directional stretch, be sintering typing (poly tetrafluoroethylene contact hot-rolling) on 380 ℃ the hot-rolling in surface temperature then, sintering time 5 seconds promptly obtains polytetrafluoroethylene (PTFE)/polyurethane composite membrane.
In described polytetrafluoroethylene (PTFE)/polyurethane composite membrane, polytetrafluoroethylene (PTFE) thickness is 16 microns, and polyurethane thickness is 2.4 microns.
Test result shows, the polytetrafluoroethylene (PTFE)/vapor transfer rate of polyurethane composite membrane, water pressure resistance, the Air permenbility by method for preparing is distributed as 12300 grams/square metres 24 hours, 72 kPas, 3219 milliliters of/square metre seconds.
Embodiment 2:
(1) batch mixing: teflon resin powder (CD123 of Japan AGC company), kerosene are mixed according to 1: 0.23 weight ratio, under 30 ℃ temperature, left standstill 130 hours, under 65 ℃ temperature, left standstill 12 hours then, toner is fully mixed with fluid lubricant, form the polytetrafluoroethylene (PTFE) material;
(2) pressed compact and calendering: described polytetrafluoroethylene (PTFE) material is pressed into cylindrical blank under 20 ℃, blank is extruded club by the pushing machine on harder under 60 ℃ temperature, under 60 ℃, roll into the polytetrafluoroethylene (PTFE) base band through calender then;
(3) longitudinal stretching:, obtain polytetrafluoroethylene (PTFE) degreasing base band with described polytetrafluoroethylene (PTFE) base band longitudinal stretching in 250 ℃ of baking ovens;
The thickness of described polytetrafluoroethylene (PTFE) degreasing base band is 72 microns.
(4) with described polytetrafluoroethylene (PTFE) degreasing base band decatize 10 hours in water vapour, steam temperature is 100 ℃, obtains polytetrafluoroethylene (PTFE) decatize degreasing base band;
(5) with polyurethane particles material (U.S. promise reputation company 58245) drier inner drying 5 hours, baking temperature is 80 ℃.Utilize in the extruder that has board-like die head then and extrude polyurethane sheet, by draw-gear it is entered between polyurethane sheet and the rubber backer roll described polytetrafluoroethylene (PTFE) decatize degreasing base band, control described backer roll pressure, polyurethane sheet and described polytetrafluoroethylene (PTFE) decatize degreasing base band are fit together, carry out the air cooling processing then, make polytetrafluoroethylene (PTFE) base band/polyurethane material;
Described polyurethane sheet thickness is 17 microns;
(6) cross directional stretch and thermal finalization: with described polytetrafluoroethylene (PTFE) base band/polyurethane material under 120 ℃ on the polytetrafluoroethylene (PTFE) expander common cross directional stretch, be sintering typing (poly tetrafluoroethylene contact hot-rolling) on 320 ℃ the hot-rolling in surface temperature then, sintering time 12 seconds promptly obtains polytetrafluoroethylene (PTFE)/polyurethane composite membrane.
In described polytetrafluoroethylene (PTFE)/polyurethane composite membrane, polytetrafluoroethylene (PTFE) thickness is 21 microns, and polyurethane thickness is 2.7 microns.
Test result shows, the polytetrafluoroethylene (PTFE)/vapor transfer rate of polyurethane composite membrane, water pressure resistance, the Air permenbility by method for preparing is distributed as 11374 grams/square metres 24 hours, 169 kPas, 2918 milliliters of/square metre seconds.
Embodiment 3:
(1) batch mixing: teflon resin powder (CD123 of Japan AGC company), kerosene are mixed according to 1: 0.28 weight ratio, under 40 ℃ temperature, left standstill 144 hours, under 80 ℃ temperature, left standstill 16 hours then, toner is fully mixed with fluid lubricant, form the polytetrafluoroethylene (PTFE) material;
(2) pressed compact and calendering: described polytetrafluoroethylene (PTFE) material is pressed into cylindrical blank under 30 ℃, blank is extruded club by the pushing machine on harder under 60 ℃ temperature, under 50 ℃, roll into the polytetrafluoroethylene (PTFE) base band through calender then;
(3) longitudinal stretching:, obtain polytetrafluoroethylene (PTFE) degreasing base band with described polytetrafluoroethylene (PTFE) base band longitudinal stretching in 300 ℃ of baking ovens;
The thickness of described polytetrafluoroethylene (PTFE) degreasing base band is 80 microns.
(4) with described polytetrafluoroethylene (PTFE) degreasing base band decatize 15 hours in water vapour, steam temperature is 120 ℃, obtains polytetrafluoroethylene (PTFE) decatize degreasing base band;
(5) with polyurethane particles material (U.S. promise reputation company 58245) drier inner drying 1 hour, baking temperature is 140 ℃.Utilize in the extruder that has board-like die head then and extrude polyurethane sheet, by draw-gear it is entered between polyurethane sheet and the rubber backer roll described polytetrafluoroethylene (PTFE) decatize degreasing base band, control described backer roll pressure, polyurethane sheet and described polytetrafluoroethylene (PTFE) decatize degreasing base band are fit together, carry out the air cooling processing then, make polytetrafluoroethylene (PTFE) base band/polyurethane material;
Described polyurethane sheet thickness is 20 microns;
(6) cross directional stretch and thermal finalization: with described polytetrafluoroethylene (PTFE) base band/polyurethane material under 170 ℃ on the polytetrafluoroethylene (PTFE) expander common cross directional stretch, be sintering typing (poly tetrafluoroethylene contact hot-rolling) on 300 ℃ the hot-rolling in surface temperature then, sintering time 16 seconds promptly obtains polytetrafluoroethylene (PTFE)/polyurethane composite membrane.
In described polytetrafluoroethylene (PTFE)/polyurethane composite membrane, polytetrafluoroethylene (PTFE) thickness is 30 microns, and polyurethane thickness is 3 microns.
Test result shows, the polytetrafluoroethylene (PTFE)/vapor transfer rate of polyurethane composite membrane, water pressure resistance, the Air permenbility by method for preparing is distributed as 10632 grams/square metres 24 hours, 180 kPas, 2015 milliliters of/square metre seconds.
Claims (6)
1, the preparation method of polytetrafluoroethylene (PTFE) and thermoplastic polyurethane laminated film is characterized in that comprising the steps:
(1) batch mixing: with teflon resin powder, fluid lubricant is 1: 0.2～0.28 mixing by weight, under 20～40 ℃ temperature, left standstill 96～144 hours, under 40～80 ℃ temperature, left standstill 10～16 hours then, toner is fully mixed with fluid lubricant, form the polytetrafluoroethylene (PTFE) material;
(2) pressed compact and calendering: described polytetrafluoroethylene (PTFE) material is pressed into cylindrical blank on harder under 20～30 ℃, blank is extruded club by the pushing machine under 40～60 ℃ temperature, under 40～60 ℃, roll into the polytetrafluoroethylene (PTFE) base band through calender then;
(3) longitudinal stretching: with described polytetrafluoroethylene (PTFE) base band longitudinal stretching in 180～300 ℃ of baking ovens, obtain polytetrafluoroethylene (PTFE) degreasing base band, its thickness is 50～80 microns;
(4), obtain polytetrafluoroethylene (PTFE) decatize degreasing base band with polytetrafluoroethylene (PTFE) degreasing base band decatize in water vapour;
(5) with the polyurethane particles material drier inner drying 1～5 hour, baking temperature is 80～140 ℃, utilizes in the extruder that has board-like die head then and extrudes polyurethane sheet, thickness is 15～20 microns; By draw-gear it is entered between polyurethane sheet and the rubber backer roll polytetrafluoroethylene (PTFE) decatize degreasing base band, control backer roll pressure, polyurethane sheet and described polytetrafluoroethylene (PTFE) decatize degreasing base band are fit together, carry out the air cooling processing then, make PTFE base and thermoplastic polyurethane tape;
(6) cross directional stretch and thermal finalization: with polytetrafluoroethylene (PTFE) base band and polyurethane material under 80～170 ℃ on the polytetrafluoroethylene (PTFE) expander common cross directional stretch, then on surface temperature is 300～380 ℃ hot-rolling, the typing of poly tetrafluoroethylene contact hot-rolling sintering, sintering time 5～16 seconds promptly obtains polytetrafluoroethylene (PTFE) and polyurethane composite membrane.
2, the preparation method of polytetrafluoroethylene (PTFE) according to claim 1 and thermoplastic polyurethane composite membrane is characterized in that: the steam temperature of described polytetrafluoroethylene (PTFE) degreasing base band is 90～120 ℃, and steaming time is 30 minutes～15 hours.
3, the preparation method of polytetrafluoroethylene (PTFE) according to claim 1 and thermoplastic polyurethane composite membrane is characterized in that: described polyurethane particles material is thermoplasticity or moisture permeability.
4, the preparation method of polytetrafluoroethylene (PTFE) according to claim 1 and thermoplastic polyurethane composite membrane is characterized in that: in described polytetrafluoroethylene (PTFE) and the polyurethane composite membrane, polytetrafluoroethylene (PTFE) thickness is 16～30 microns, and polyurethane thickness is 2.4～3 microns.
5, the preparation method of polytetrafluoroethylene (PTFE) according to claim 1 and thermoplastic polyurethane composite membrane is characterized in that: described fluid lubricant is atoleine or kerosene.
6, the preparation method of polytetrafluoroethylene (PTFE) according to claim 1 and thermoplastic polyurethane composite membrane is characterized in that: the degree of crystallinity of described teflon resin powder is 98～99.9%, molecular weight is 2,000,000～10,000,000.
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Cited By (10)
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| JP2009120722A (en) * | 2007-11-15 | 2009-06-04 | Yunimatekku Kk | Polyurethane elastomer composition |
| CN103272497A (en) * | 2013-04-22 | 2013-09-04 | 浙江国泰密封材料股份有限公司 | Preparation method for multifunctional PTFE composite film |
| CN104802429A (en) * | 2015-04-23 | 2015-07-29 | 湖州绿净环保科技有限公司 | Method for improving porosity rate of two-way stretching polytetrafluoroethylene micropore thin film |
| CN104894877A (en) * | 2015-06-29 | 2015-09-09 | 宣海燕 | Production method of windproof breathable textile |
| CN105385145A (en) * | 2015-12-21 | 2016-03-09 | 江苏宏远新材料科技有限公司 | Wear-resistant polyurethane film |
| CN107487005A (en) * | 2017-07-25 | 2017-12-19 | 浙江理工大学 | A kind of preparation method of unsymmetric structure polytetrafluoroethylene (PTFE) micro-pore aeration film |
| CN109663226A (en) * | 2019-02-21 | 2019-04-23 | 遵义医学院附属医院 | A kind of thoracic cavity radiotherapy combines thermoplastic body film with vacuum pad and fixes device |
| CN111775525A (en) * | 2019-04-04 | 2020-10-16 | 东莞市科迪实业有限公司 | Non-woven fabric base layer fabric and preparation method thereof |
| CN112936926A (en) * | 2019-12-10 | 2021-06-11 | 东莞先健新材料科技有限公司 | Polytetrafluoroethylene (PTFE) bulked film and preparation method thereof |
| CN115386120A (en) * | 2022-10-19 | 2022-11-25 | 江苏旭氟新材料有限公司 | Preparation method of elastic waterproof moisture-permeable PTFE film |
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| CN1134030C (en) * | 1999-03-17 | 2004-01-07 | 四川师范大学 | Magnetic polymer base material and shapes of the material |
| CN1291828C (en) * | 2003-01-22 | 2006-12-27 | 中国人民解放军总后勤部军需装备研究所士兵系统研究中心 | Method for preparing complex film of polyurethane-Teflon stretched jointly |
| CN1315937C (en) * | 2003-06-25 | 2007-05-16 | 中国人民解放军总后勤部军需装备研究所 | Process for preparing moisture permeability anti-virus polytetrafluoroethylene composite film |
| US20050238872A1 (en) * | 2004-04-23 | 2005-10-27 | Kennedy Michael E | Fluoropolymer barrier material |
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- 2005-12-05 CN CNB2005100618274A patent/CN100377864C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009120722A (en) * | 2007-11-15 | 2009-06-04 | Yunimatekku Kk | Polyurethane elastomer composition |
| CN103272497A (en) * | 2013-04-22 | 2013-09-04 | 浙江国泰密封材料股份有限公司 | Preparation method for multifunctional PTFE composite film |
| CN103272497B (en) * | 2013-04-22 | 2015-11-18 | 浙江国泰密封材料股份有限公司 | A kind of preparation method of multifunctional PTFE composite film |
| CN104802429A (en) * | 2015-04-23 | 2015-07-29 | 湖州绿净环保科技有限公司 | Method for improving porosity rate of two-way stretching polytetrafluoroethylene micropore thin film |
| CN104894877A (en) * | 2015-06-29 | 2015-09-09 | 宣海燕 | Production method of windproof breathable textile |
| CN105385145A (en) * | 2015-12-21 | 2016-03-09 | 江苏宏远新材料科技有限公司 | Wear-resistant polyurethane film |
| CN107487005A (en) * | 2017-07-25 | 2017-12-19 | 浙江理工大学 | A kind of preparation method of unsymmetric structure polytetrafluoroethylene (PTFE) micro-pore aeration film |
| CN109663226A (en) * | 2019-02-21 | 2019-04-23 | 遵义医学院附属医院 | A kind of thoracic cavity radiotherapy combines thermoplastic body film with vacuum pad and fixes device |
| CN111775525A (en) * | 2019-04-04 | 2020-10-16 | 东莞市科迪实业有限公司 | Non-woven fabric base layer fabric and preparation method thereof |
| CN112936926A (en) * | 2019-12-10 | 2021-06-11 | 东莞先健新材料科技有限公司 | Polytetrafluoroethylene (PTFE) bulked film and preparation method thereof |
| CN115386120A (en) * | 2022-10-19 | 2022-11-25 | 江苏旭氟新材料有限公司 | Preparation method of elastic waterproof moisture-permeable PTFE film |
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| CN100377864C (en) | 2008-04-02 |
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Assignee: Zhejiang province Langsha Underwear Co. Ltd. Assignor: Zhejiang Sci-Tech University Contract fulfillment period: 2008.4.15 to 2013.4.14 contract change Contract record no.: 2008330001422 Denomination of invention: Preparation method of composite film of poly tetrafluoro ethylene and thermoplastic polyurethane Granted publication date: 20080402 License type: Exclusive license Record date: 20081028 |
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