CN101717561B - Polyester waterproof ventilated membrane, three-layer compound material, preparation method and application thereof - Google Patents
Polyester waterproof ventilated membrane, three-layer compound material, preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a polyester micro-porous film having waterproof ventilating and drenching functions, a three-layer compound material, a preparation method and the application thereof. The blend of polyethylene glycol terephthalate, polyethylene terephthalates, Valox and low-melting polyester is the base of polymer. Inorganic filler and processing agent are added in order to prepare polyester micro-porous film having waterproof ventilating and drenching functions. Based on the softening point difference among the low-melting polyester in the polymer base of the micro-porous film and the PET, PTT and PBT, the high intensity three-layer compound material having waterproof, ventilating and drenching functions is prepared by hot-pressing the inner and outer layers of polyester non-woven fabrics, with a polyester micro-porous film in the middle layer. The compound material of the invention can be used as a waterproof ventilating and drenching cushion ply on a slope roof and also can be used as a waterproof drenching cushion ply on the inner side of the hanging type decoration materials on the outer wall of building.
Description
Technical field
The present invention relates to a kind of polyester microporous membrane with water-proof air-moisture-permeable function, also relating to this microporous membrane is the 3-layer composite material in middle layer, and preparation method thereof and the application in building field, belong to building material field.
Background technology
With inside and outside two-layer be non-woven fabrics of synthetic fiber, the middle layer is the 3-layer composite material of polymer-based carbon water-proof air-moisture-permeable microporous membrane, can be used as the water-proof air-moisture-permeable bed course and the freeze proof Waterproof Breathable lining of building external wall waterproof of sloping formula roofing in building field.For above-mentioned 3-layer composite material, its inside and outside two-layer non-woven fabrics of synthetic fiber is mainly used to embody the intensity of matrix material, performance such as anti-aging and fire-retardant, the middle layer is the most key, it only allow gas molecule and water molecules by and water droplet (being the water molecules aggregate) can't pass through, the water-proof air-moisture-permeable function of matrix material realizes by it fully.
The polymer-based carbon microporous membrane comprises microporous polyolefin film and microporous teflon membran etc.Microporous polyolefin film can be used for water-proof air-moisture-permeable laying, tent and the canopy material in the building field after synthetic fabric nonwoven cloth is compound.Microporous teflon membran is the multi-layer sintering stretched film because and expensive, only be used for the dome and the special protecting clothing of large-scale public venue usually.
Method for preparing polyolefin microporous membrane mainly contains solvent pore method, mechanical hole fabrication method and stretching pore method, and wherein tool industrialization competitive edge is stretching pore method.
What CN 1381624A related to is that the middle layer is a polyethene microporous membrane, and ectonexine is the 3-layer composite material of the nonwoven polypropylene fabric of prior art.The preparation of microporous membrane is by fully drawing realization again through a line pressure roller during hardening by cooling as yet by casting films, in drilling, realize the compound of middle layer and ectonexine non-woven fabrics, its pore method is mechanical pore method, the air-moisture-permeable amount of the matrix material of this method preparation is lower, product is not suitable for building field, only is applicable to garment industry.Comparatively similarly patent has US 498372, US3903234, EP-A-2702026, CN 1258305A, CN 1041167A etc. in addition.
CN 100500429C discloses a kind of preparation method with three layers of composite membrane of air-cleaning function and waterproof and breathable function.The used polymeric acceptor of its middle layer microporous membrane is linear low density polyethylene/ethylene-octene copolymer or polyester/polyurethane system, the pore method is the stretching pore, but the middle layer microporous membrane is realized through a hot pressing than the bigger softening temperature difference of the low-melting ethylene-octene copolymer of linear low density polyethylene (elastomerics) under suitable temp with three layers of compound mat fusing point of inside and outside two-layer non-woven fabrics of synthetic fiber, when the polymeric matrix of microporous membrane was the polyester/polyurethane system, three layers of compound dependence fusing point urethane adhesive property under suitable temp lower than melting point polyester were realized through a hot pressing.
Kingly way is stepped on and is built medium (functional polymer journal, Vol.21, No.1,2008) with grandson and studied the influence of processing condition to the pore structure and the waterproof and breathable performance of linear low density polyethylene/ethylene-octene copolymer/lime carbonate microporous membrane.Result of study points out that draw ratio and calcium carbonate content have a significant effect to aperture, voidage and the waterproof and breathable performance of micropore.
Because (260 ℃ of melting point polyester height, far above poly fusing point), melt viscosity is big, easily crystallization, thereby when the used polymeric matrix of microporous membrane is vibrin, its pore meeting that stretches obviously is difficult to the stretching pore of microporous membrane polymeric matrix when being polyethylene.Yet, because polyester film intensity is much larger than polyethylene film strength (big 4～6 times usually), and low-melting point polyester (LMPET, 110～130 ℃ of melting ranges) and the softening temperature difference between the polyethylene terephthalate (PET), Poly(Trimethylene Terephthalate) (PTT), polybutylene terephthalate (PBT) big (differing 130～150 ℃), the hot pressing that is easy to microporous membrane and inside and outside two layers polyester (PET) non-woven fabrics is compound.In addition, all less than degree of crystallinity and the melt viscosity of PET, blend PTT or PBT can effectively regulate degree of crystallinity and melt viscosity in PET, make it to be easy to the pore that stretches for the degree of crystallinity of PTT and PBT and melt viscosity.Therefore, with the blend of PET, PTT, PBT and low-melting point polyester be polymeric matrix prepare microporous membrane can when obtaining high-strength membrane, be easy to the hot pressing of polyester non-woven fabric compound, thereby the preparation middle layer inside and outside two-layer high strength 3-layer composite material with water-proof air-moisture-permeable function of polyester non-woven fabric that is that is the polyester microporous membrane.
Up to the present, do not see that as yet used polymeric matrix is the stretching pore type microporous membrane of co-mixing system of PET, PTT, PBT and low-melting point polyester and the open report of Composite Preparation thereof.
Summary of the invention
In order to overcome defective of the prior art, the object of the present invention is to provide a kind of used polymeric matrix is the stretching pore type water-proof air-moisture-permeable microporous membrane of the blend of polyethylene terephthalate (PET), Poly(Trimethylene Terephthalate) (PTT), polybutylene terephthalate (PBT) and low-melting point polyester (LMPET), and the middle layer is described microporous membrane, inside and outside two-layer 3-layer composite material for polyester non-woven fabric and preparation method thereof.
In order to achieve the above object, the present invention adopts following technical scheme:
The invention provides a kind of water-proof air-moisture-permeable microporous membrane, described microporous membrane comprises the component of following weight part: 90～110 parts in polymkeric substance, 140～160 parts of mineral fillers, 2～4 parts of coupling agents, 1～2 part of dispersion agent, 2～5 parts of lubricants, wherein said polymkeric substance is polyethylene terephthalate (PET), Poly(Trimethylene Terephthalate) (PTT), the blend of polybutylene terephthalate (PBT) and low-melting point polyester (LMPET), described low-melting point polyester comprises polyethylene terephthalate-1,4 cyclohexanedimethanoester esters (PETG) or poly-ethylene m-phthalate-1,4 cyclohexanedimethanoester ester (PCTG).
Preferably, the weight part of each raw material is: 100 parts in polymkeric substance, 140 parts of mineral fillers, coupling agent 3 weight parts, dispersion agent 2 weight parts, lubricant 4 weight parts.
Wherein, the weight proportion of PET/PTT/PBT/LMPET is 50～70: 5～15 in the described polymkeric substance: 5～15: 10～25, determine that through orthogonal test the preferred weight proportioning of above-mentioned four kinds of polymkeric substance is 60: 10: 10: 20.
Described mineral filler is water-ground limestone, covers holder soil or titanium dioxide, particle diameter 1～8 μ m of water-ground limestone, and preferred 3～5 μ m cover native particle diameter 2～9 μ m of holder, preferred 3～5 μ m, particle diameter 2～8 μ m of titanium dioxide, preferred 4～6 μ m.
Described coupling agent is selected from one or both in aluminic acid ester, titanic acid ester, vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane, the 3-methacryloxypropyl trimethoxy silane; When using two kinds of coupling agents, the preferred weight proportioning is 1: 1.
Described dispersion agent is selected from one or both in linear high polysiloxane and the ethylene-vinyl acetate copolymer; When using two kinds of dispersion agents, the preferred weight proportioning is 1: 1.
Described lubricant is selected from one or both in ethylene bis stearamide, stearic acid, the oxidized polyethlene wax; When using two kinds of lubricants, the preferred weight proportioning is 1: 1.
The present invention also provides the preparation method of above-mentioned water-proof air-moisture-permeable microporous membrane, comprises the steps:
A, take by weighing each raw material: 90～110 parts in polymkeric substance, 140～160 parts of mineral fillers, 2～4 parts of coupling agents, 1～2 part of dispersion agent, 2～5 parts of lubricants by following weight part;
B, with polyester (PET, PTT, PBT) with the pre-crystallization of polyester slice drying machine and drying and dehydrating, 140～145 ℃ of pre-Tcs, 0.5～1 hour time, 160～170 ℃ of drying temperatures, 3～4 hours time, content of residual water≤30ppm;
C, low-melting point polyester (PETG, PCTG) are used the Vacuumdrier drying and dehydrating, highest attainable vacuum≤3Pa, 90～100 ℃ of drying temperatures, 3～4 hours time, content of residual water≤30ppm;
D, mineral filler Vacuumdrier drying and dehydrating, highest attainable vacuum≤3Pa, 90～100 ℃ of drying temperatures, 3～4 hours time, content of residual water≤20ppm;
E, the raw material of above-mentioned weight part is mixed in high-speed mixer and low speed mixer successively, with exhaust parallel dual-screw extruding machine extruding pelletization, extruding curtain coating by single screw extrusion machine per os mould again, to be cooled to thickness 90～105 μ m fabric widths be the sheet material of 1.6～1.7m, with sheet material under 90～100 ℃ of conditions through two-stage single shaft longitudinal tensile fixture, stretching with draw ratio 3～4, to make fabric width be that 1.5～1.6m, thickness are the microporous membrane of 25～35 μ m.
The present invention also provides a kind of 3-layer composite material of water-proof air-moisture-permeable, and its middle layer is above-mentioned microporous membrane with water-proof air-moisture-permeable function, and two-layer inside and outside it is polyester non-woven fabric.
The preparation method of described 3-layer composite material comprises the steps: above-mentioned microporous membrane, the microporous membrane that promptly stretches and obtain when pore is finished, without rolling directly through cooling roller, gap bridge roller and preheat roll enter the composite structure of being made up of a line hot pressing roller and lining roller, inside and outside two layers polyester non-woven fabrics is through debatching, after the preheating from the above-mentioned microporous membrane synchronous inlet point hot pressing in the both sides up and down composite structure of traffic direction forward, by low-melting point polyester (as PETG, PCTG, 110～130 ℃ of melting ranges) and PET, PTT, big fusing point between the PBT poor (differing 130～150 ℃), roll surface has the effect of the hot pressing roller and the lining roller of uniform projection structure, realize that the some hot pressing under the adhesive-free condition of above-mentioned trilaminate material is compound, thereby make 3-layer composite material of the present invention.Wherein, hot combined temp is 120～130 ℃, is preferably 120～125 ℃.
Microporous membrane of the present invention and the 3-layer composite material of making thus have excellent water-proof air-moisture-permeable function and good strength property.Detected result shows that the Air permenbility of 3-layer composite material of the present invention can reach 0.15～0.50cm
3/ cm
2.s, vapor transfer rate is up to 3650～3900g/m
2.24h, water resistance is up to 0.20～0.25MPa, and endwise tensile strength is 360～378N/5cm, and transverse tensile strength is 250～278N/5cm.
3-layer composite material of the present invention can be used for the water-proof air-moisture-permeable bed course of sloping formula roofing, also can be used for the Waterproof Breathable bed course of skin dry-hang finishing material inboard.
Embodiment
By the following examples the present invention is specifically described; these embodiment only are used for that the present invention is further illustrated; can not be interpreted as limiting the scope of the invention; those skilled in the art's content according to the present invention is made some non-intrinsically safe improvement, all belongs to protection domain of the present invention.
Embodiment 1
With PET (PG620, Yizheng Chemical Fibre Co., Ltd.) 60Kg, PTT (FG30, U.S. Shell Co. Ltd) 10Kg, PBT (B4406, BASF Aktiengesellschaft) 10Kg polyester slice fluidized bed type crystallizing and drying machine (FBCD type, imperial machinofacture company limited is risen by the Zhangjagang City) crystallizing and drying, pre-Tc is 140 ℃, 0.5 hour time, 160 ℃ of drying temperatures, 4 hours time of drying, residual moisture content＜35ppm.
With PETG (0603, U.S. Yi Shi Man) 20Kg DoubletaperedVacuumdrier (GZS type, Qianjiang Drying Equipment Co., Ltd., Hangzhou) drying and dehydrating, highest attainable vacuum≤3Pa, 90～100 ℃ of drying temperatures, 4 hours time, content of residual water≤30ppm;
With water-ground limestone (particle diameter 3～5 μ m, HT-1500, Changxing, Zhejiang the earth novel material company limited) 140Kg DoubletaperedVacuumdrier (GZS type, Qianjiang Drying Equipment Co., Ltd., Hangzhou) drying and dehydrating, highest attainable vacuum≤3Pa, 90～100 ℃ of drying temperatures, 4 hours time, content of residual water≤30ppm;
Above-mentioned content of residual water is measured with differential moisture content tester (SF-1, the Changzhou second textile instrument factory).
Above-mentioned dried water-ground limestone 140Kg is joined high-speed mixer (Zhangjagang City's pentahapto machinery company limited, WH-SRL-Z200/500 high speed/low speed mixing unit) in, after mixing 3min, add coupling agent aluminic acid ester (TG-27, Yizheng City, Jiangsu believes the moral auxiliary reagent factory) and titanic acid ester (TG-38s, letter moral auxiliary reagent factory, Yizheng City, Jiangsu) each 1.5Kg, after mixing 3min, add above-mentioned dried PET, PTT, PBT and PETG polyester blend, the linear high polysiloxane (MB50 of dispersion agent, Dow corning company) 2Kg, lubricant ethylene bis stearamide (E0243-25G, successful plastic material company limited can be matched in the changzhou) 3Kg, mix 4min, the control mixing temperature is at 108～110 ℃, after high-speed mixing finishes, above-mentioned compound enters low speed mixer, mix 30min, and when making material be cooled to below 40 ℃, this chilled compound is used with exhaust parallel dual-screw (times Long Keya machinery company limited of Nanjing section, CTE-65) in 270～290 ℃ of plasticizings, dehydration, extrude air-cooled granulation, with this pellet single screw extrusion machine (Wuhan modern plastics machine die company limited, screw diameter 120mm, 1) and mouthful mould length-to-diameter ratio L/D=33:, extrude 230～285 ℃ of plasticizings, making thickness through the cooling of curtain coating unit (Wuhan modern plastics machine die company limited) curtain coating is 100 ± 2 μ m, fabric width is the sheet material of 1.6m, this sheet material is entered the vertical uniaxial extension device of two-stage (Wuhan modern plastics machine die company limited) under 95 ± 3 ℃, regulate first, second stage draw ratio respectively is 2, total draw ratio is a stretched sheet under 4 the condition, making fabric width is 1.5m, and thickness is the microporous membrane of 30 ± 1 μ m.
Finished the stretching pore and be under 45～55m/min speed the microporous membrane in the dynamic operation above-mentioned through cooling roller, gap bridge roller and preheat roll inlet point hot pressing composite structure (Wuhan modern plastics machine die company limited), inside and outside two layers polyester non-woven fabrics (0671, Ningbo bright industry Science and Technology Ltd.) through debatching and preheating, from the above-mentioned microporous membrane synchronous inlet point hot pressing in the both sides up and down composite structure of traffic direction forward, under 120 ℃ (hot pressing roll temperatures), rely on composite structure central roll mask that the some hot pressing roller and the lining roller of uniform projection structure are arranged, to be combined into the middle layer be polyester microporous membrane and the inside and outside two-layer 3-layer composite material of polyester non-woven fabric that is in some hot pressing under the adhesive-free situation.
Embodiment 2
With the PCTG (0618 behind the method drying and dehydrating of embodiment 1, U.S. Yi Shi Man) PETG in the 20Kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.
Embodiment 3
With (particle diameter 3～5 μ m of the illiteracy holder soil behind the method drying and dehydrating of embodiment 1, JT-518, the Zhejiang safe wilkinite of Anji County gold company limited) water-ground limestone in the 150Kg alternate embodiment 1, with coupling agent vinyltrimethoxy silane (A-171, the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing) coupling agent aluminic acid ester and the titanic acid ester in the 2Kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare the technological process of microporous membrane and preparation 3-layer composite material and condition with embodiment 1.
Embodiment 4
With (particle diameter 3～5 μ m of the titanium dioxide behind the method drying and dehydrating of embodiment 1, R1931, the Shanghai river titanium white chemical industry company limited that jumps) water-ground limestone in the 160Kg alternate embodiment 1, with coupling agent 3-mercaptopropyl trimethoxysilane (KH-580, the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing) coupling agent aluminic acid ester and the titanic acid ester in the 3kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare the technological process of microporous membrane and preparation 3-layer composite material and condition with embodiment 1.
Embodiment 5
With coupling agent 3-methacryloxypropyl trimethoxy silane (KH-570, the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing) coupling agent aluminic acid ester and the titanic acid ester in the 2kg alternate embodiment 1, with the linear high polysiloxane of the dispersion agent in the dispersion agent ethylene-vinyl acetate copolymer 2kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare the technological process of microporous membrane and preparation 3-layer composite material and condition with embodiment 1.
Embodiment 6
With lubricant stearic acid (1801, the new chemical industry company limited for a long time in Shanghai) 1kg and oxidized polyethlene wax (PEW-0200, sky, Nanjing poem micro mist company limited) 1kg, lubricant ethylene bis stearamide in the alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.
Comparative example 1
(both all need not to use the drying machine drying with linear low density polyethylene 80 weight parts and ethylene-octene copolymer 20 weight parts, directly use) polyester PET, PTT, PBT and PETG in the alternate embodiment 1, all the other raw materials, auxiliary agent and consumption, mixing, granulation, curtain coating, stretching prepare microporous membrane and inside and outsidely two-layerly prepare the technological process of 3-layer composite material with embodiment 1 during for nonwoven polypropylene fabric.Plasticizing extruding pelletization temperature is 110～200 ℃, and the temperature that curtain coating is extruded in plasticizing is 110～230 ℃.
Comparative example 2
With PET, PTT, PBT and the PETG in PET45Kg, PTT25Kg behind the method drying and dehydrating of embodiment 1, PBT22Kg and the PETG8Kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.
Comparative example 3
With PET, PTT, PBT and the PETG in PET40Kg, PTT10Kg behind the method drying and dehydrating of embodiment 1, PBT20Kg and the PETG30Kg alternate embodiment 1, all the other raw materials and used weight part, drying and dehydrating, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.
Experimental example 1
The Air permenbility of the 3-layer composite material that 3-layer composite material that embodiment of the invention 1-6 is prepared and comparative example 1-3 are prepared, vapor transfer rate, water resistance, vertical tension and horizontal tensile property index are tested according to national standard:
Measure Air permenbility with homemade Y-561 type two-box type low pressure Air permenbility tester (test of GB/T 5453-1997 textile fabric Air permenbility); Vapor transfer rate is measured (GB/T 12704-91 textile fabric vapor transfer rate testing method siccative method) with the positive agar diffusion method of siccative; Water resistance (resistance to hydrostatic pressure) is measured (GB/T 4744-1991, water permeability resistance is measured hydrostatic test) with YG-812 type hydraulic pressure instrument; Endwise tensile strength and transverse tensile strength are measured according to GB/T 4757-1997 (textile fabric test for tensile strength).Measurement result sees Table 1.
Table 1
| Air permenbility (cm 3/cm 2.s) | Vapor transfer rate (g/m 224h) | Resistance to hydrostatic pressure (MPa) | Vertical tension (N/5cm) | Horizontal tension (N/5cm) | |
| Embodiment 1 | 0.28 | 3800 | 0.25 | 360 | 250 |
| Embodiment 2 | 0.29 | 3900 | 0.24 | 365 | 260 |
| Embodiment 3 | 0.31 | 3870 | 0.23 | 370 | 263 |
| Embodiment 4 | 0.30 | 3780 | 0.24 | 374 | 278 |
| Embodiment 5 | 0.27 | 3650 | 0.23 | 378 | 273 |
| Embodiment 6 | 0.26 | 3680 | 0.25 | 367 | 275 |
| Comparative example 1 | 0.30 | 3750 | 0.20 | 260 | 170 |
| Comparative example 2 | 0.23 | 3550 | 0.19 | 170 | 115 |
| Comparative example 3 | 0.26 | 3500 | 0.16 | 155 | 109 |
As shown in Table 1, the microporous membrane of the blend preparation of PET, PTT, PBT and low-melting point polyester, inside and outside two-layer 3-layer composite material for the polyester non-woven fabric preparation vertically and transverse tensile strength be the tensile strength of two-layer 3-layer composite material for the nonwoven polypropylene fabric preparation inside and outside the main body apparently higher than the micropore linear low density polyethylene, and ventilative, wet and reach the water resistance excellence thoroughly.
By table 1 also as can be known, (comparative example 2 when PET, PTT, PBT and PETG proportioning exceed ratio range of the present invention, 3), 3-layer composite material vertically and the obvious variation of transverse tensile strength, this is that the strength degradation of middle layer waterproof ventilated membrane when bad and low-melting point polyester consumption is higher by low-melting point polyester consumption time point hot pressing on the low side composite effect causes.
Claims (9)
1. a water-proof air-moisture-permeable microporous membrane is characterized in that the component that it comprises following weight part: 90～110 parts in polymkeric substance, 140～160 parts of mineral fillers, 2～4 parts of coupling agents, 1～2 part of dispersion agent, 2～5 parts of lubricants; Wherein, described polymkeric substance is the blend of polyethylene terephthalate (PET), Poly(Trimethylene Terephthalate) (PTT), polybutylene terephthalate (PBT) and low-melting point polyester (LMPET); Wherein, the weight proportion of described PET/PTT/PBT/LMPET is 50～70: 5～15: 5～15: 10～25; Described low-melting point polyester (LMPET) is polyethylene terephthalate-1,4 cyclohexanedimethanoester ester (PETG) or poly-ethylene m-phthalate-1,4 cyclohexanedimethanoester ester (PCTG).
2. water-proof air-moisture-permeable microporous membrane according to claim 1 is characterized in that the component that it comprises following weight part: polymkeric substance 100 weight parts, 140 parts of weight parts of mineral filler, coupling agent 3 weight parts, dispersion agent 2 weight parts, lubricant 4 weight parts.
3. water-proof air-moisture-permeable microporous membrane according to claim 1 and 2, the weight proportion that it is characterized in that described PET/PTT/PBT/LMPET is 60: 10: 10: 20.
4. water-proof air-moisture-permeable microporous membrane according to claim 1 and 2, it is characterized in that described mineral filler is to be selected from water-ground limestone, to cover a kind of in holder soil and the titanium dioxide, wherein the particle diameter of water-ground limestone is 1～8 μ m, the particle diameter that covers holder soil is 2～9 μ m, and the particle diameter of titanium dioxide is 2～8 μ m.
5. water-proof air-moisture-permeable microporous membrane according to claim 1 and 2, it is characterized in that described coupling agent is selected from one or both in aluminic acid ester, titanic acid ester, vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane and the 3-methacryloxypropyl trimethoxy silane, the weight proportion of two kinds of coupling agents is 1: 1; Described dispersion agent is selected from one or both in linear high polysiloxane and the ethylene-vinyl acetate copolymer, and the weight proportion of two kinds of dispersion agents is 1: 1; Described lubricant is selected from one or both in ethylene bis stearamide, stearic acid and the oxidized polyethlene wax, and the weight proportion of two kinds of lubricants is 1: 1.
6. method for preparing claim 1 or 2 described water-proof air-moisture-permeable microporous membranes may further comprise the steps:
A, polymkeric substance 90～110 weight parts, mineral filler 140～160 weight parts, coupling agent 2～4 weight parts, dispersion agent 1～2 weight part, lubricant 2～5 weight parts; Described polymkeric substance is the blend of polyethylene terephthalate (PET), Poly(Trimethylene Terephthalate) (PTT), polybutylene terephthalate (PBT) and low-melting point polyester (LMPET); Wherein, the weight proportion of described PET/PTT/PBT/LMPET is 50～70: 5～15: 5～15: 10～25; Described low-melting point polyester (LMPET) is polyethylene terephthalate-1,4 cyclohexanedimethanoester ester (PETG) or poly-ethylene m-phthalate-1,4 cyclohexanedimethanoester ester (PCTG);
B, with PET, PTT, PBT with pre-crystallization of polyester slice drying machine and drying and dehydrating;
C, with low-melting point polyester Vacuumdrier drying and dehydrating;
D, with mineral filler Vacuumdrier drying and dehydrating;
E, with above-mentioned raw materials successively with high-speed mixer and low speed mixer mix the back extruding pelletization, extruding curtain coating cooling, to make thickness be 95～105 μ m, fabric width is the sheet material of 1.6～1.7m, sheet material is made fabric width through two-stage stretching pore under 90～115 ℃ of conditions be 1.5～1.6m, and thickness is the microporous membrane of 25～35 μ m.
7. the 3-layer composite material of a water-proof air-moisture-permeable, its middle layer is claim 1 or 2 described water-proof air-moisture-permeable microporous membranes, its inside and outside two-layer is polyester non-woven fabric.
8. method for preparing the described water-proof air-moisture-permeable 3-layer composite material of claim 7, it is characterized in that comprising the steps: with claim 1 or 2 described microporous membranes, promptly stretching, pore is finished and the microporous membrane in dynamic operation, with the synchronous inlet point hot pressing of inside and outside two layers polyester non-woven fabrics composite structure, the effect of uniform projection structure of, hot pressing roller roll surface big by the softening temperature difference between low-melting point polyester and PET, PTT, the PBT and lining roller is the compound 3-layer composite material of making of some hot pressing under 120～130 ℃ the condition at hot combined temp.
9. the application of the described water-proof air-moisture-permeable 3-layer composite material of claim 7 in building field comprises the water-proof air-moisture-permeable bed course as sloping formula roofing, or as the Waterproof Breathable laying of skin dry-hang finishing material inboard.
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|---|---|---|---|---|
| CN101985085B (en) * | 2010-11-04 | 2013-06-26 | 浙江大学 | Polyester flat microporous membrane and preparation method thereof |
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