CN101659769A - Waterproof air and moisture permeable microporous film, three-layer composite material and preparation method and application thereof - Google Patents
Waterproof air and moisture permeable microporous film, three-layer composite material and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a waterproof air and moisture permeable microporous film, a three-layer composite material and a preparation method and application thereof. In the invention, the blend of polypropylene, linear low-density polyethylene and ethylene-octene copolymer is taken as the polymer matrix, and then the polymer matrix is added with inorganic filler and processing aid to be prepared into the microporous film with waterproof and air and moisture permeable functions through melt extrusion, flow casting and stretching. The microporous film is an intermediate layer and is manufacturedinto a three-layer composite material with an inner layer polypropylene nonwoven fabric and an outer layer polypropylene nonwoven fabric by direct hot pressing and compounding by utilizing the difference of the melting points among the linear low-density polyethylene in the polymer matrix of the microporous film, the ethylene-octene copolymer and the polypropylene. The composite material also canbe used as a waterproof and air and moisture permeable cushion layer for a slope type roofing and also can be taken as a waterproof and moisture-permeable liner layer at the inner side of a dry-hanging type decorative material for an external wall of a building.
Description
Technical field
The present invention relates to the microporous membrane with water-proof air-moisture-permeable function of a kind of polypropylene/linear low density polyethylene/ethylene-octene copolymer base, also relate to described 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 the microporous membrane with water-proof air-moisture-permeable function is the middle layer, synthon (polypropylene fibre, terylene) non-woven fabrics is the 3-layer composite material of ectonexine through being composited, in building field, can be used as the water-proof air-moisture-permeable bed course of sloping formula roofing, to improve the dry and comfortable performance of indoor weather, also can be used as the Waterproof Breathable laying of skin dry-hang finishing material inboard, to improve the waterproof anti-freezing property of body of wall.In 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, and the middle layer is the most key, can embody the water-proof air-moisture-permeable function of matrix material by it.
At present, the water-proof air-moisture-permeable film has non-porous film and microporous membrane two classes.Non-porous film has polyurethane film, polyoxyethylene glycol film, grafted polyester film etc., and the hydrophilic radical on non-porous film mat high polymer main chain or the grafted chain is realized the logical film migration of water molecules.The matrix material of non-porous film after synthetic fabric nonwoven cloth is compound is mainly used in high-performance apparels such as Sportswear, anorak, protective clothing.
Microporous membrane has microporous polyolefin film and microporous teflon membran.Microporous polyolefin film can be used for the water-proof air-moisture-permeable bed course in tent, sanitary product, the building field after non-woven fabric compounded.Microporous teflon membran is the multi-layer sintering stretched film, can be used for the dome of large-scale stadium.
The preparation method of microporous polyolefin film mainly contains solvent pore method, mechanical hole fabrication method and stretching pore method.
The microporous membrane preparation method that CN 1521201A relates to is exactly a solvent pore method.This method be system that polyolefine or polyester, inorganic filler, softening agent and lubricant are formed through extruding, roll film forming, realize preliminary pore with solvent flush away softening agent and lubricant then, stretch again and make microporous membrane.The defective of this method is to need use can bring the organic solvent of unsafe factor.
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, 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, US 3903234, EP-A-2702026, CN 1258305A, CN 1041167A etc.
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, and three layers compound is that the mat fusing point is realized through a hot pressing than the adhesive property of the low-melting ethylene-octene copolymer of linear low density polyethylene (elastomerics) under suitable temp.Because the fusing point difference less (＜25 ℃) of ethylene-octene copolymer and linear low density polyethylene is therefore comparatively harsh to a temperature requirements of hot pressing recombination process.
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 the rheological characteristics of polyacrylic fusing point and melt obviously is different from the fusing point and the melt rheological characteristics of polyethylene and ethylene-octene copolymer, make when the used polymeric matrix of microporous membrane is main body with the polypropylene, its pore meeting that stretches obviously is difficult to the stretching pore of microporous membrane when being main body with polymeric matrix with the polyethylene.Yet, because the polypropylene film strength is obviously greater than linear low density polyethylene film and ethylene-octene copolymer film strength, and difference big (＞70 ℃) between polyacrylic fusing point and both fusing point of back, therefore, preparing microporous membrane with above-mentioned Polymer Blending System can be when obtaining higher film toughness, and it is compound to be easy to hot pressing.Up to the present, do not see that as yet used polymeric matrix is for based on the stretching pore method microporous membrane of the polypropylene/linear low density polyethylene/ethylene-octene copolymer co-mixing system of polypropylene 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 to be stretching pore type water-proof air-moisture-permeable microporous membrane, and the middle layer is described microporous membrane, inside and outside two-layer 3-layer composite material for nonwoven polypropylene fabric and preparation method thereof based on the polypropylene/linear low density polyethylene/ethylene-octene copolymer co-mixing system of polypropylene.
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 are the mixture of polypropylene (PP), linear low density polyethylene (LLDPE) and ethylene-octene copolymer (POE).
Preferably, the weight part of each component is: 100 parts in polymkeric substance, 150 parts of mineral fillers, 3 parts of coupling agents, 2 parts of dispersion agents, 4 parts of lubricants.
Wherein, the weight proportion of described polypropylene, linear low density polyethylene and ethylene-octene copolymer is 70～80: 10～15: 10～15, determine that through orthogonal test the preferred weight proportioning of above-mentioned three kinds of polymkeric substance is 70: 15: 15.
Described mineral filler is water-ground limestone, covers and hold in the palm soil, silicon-dioxide or kaolin.Particle diameter 1～8 μ m of water-ground limestone, preferred 3～5 μ m; Cover particle diameter 2～9 μ m of holder soil, preferred 3～5 μ m; Particle diameter 2～8 μ m of silicon-dioxide, preferred 3～6 μ m; Kaolinic particle diameter 1～7 μ m, preferred 3～6 μ m.
Described coupling agent is one or more in aluminic acid ester, titanic acid ester, vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane and the 3-methacryloxypropyl trimethoxy silane; The weight proportion that is preferably aluminic acid ester and titanic acid ester is a kind of in 1: 1 mixture or vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane and the 3-methacryloxypropyl trimethoxy silane.
Described dispersion agent is one or both in linear high polysiloxane and the ethylene-vinyl acetate copolymer, and the optimum ratio when using two kinds of dispersion agents is 1: 1.
Described lubricant is one or more in ethylene bis stearamide, stearic acid and the oxidized polyethlene wax; The weight proportion that is preferably ethylene bis stearamide, stearic acid and oxidized polyethlene wax is 2: 1: 1 a mixture.
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, the raw material of above-mentioned weight part is mixed in high-speed mixer and low speed mixer successively, use the parallel dual-screw extruding machine extruding pelletization, extruding curtain coating by single screw extrusion machine per os mould again, to become thickness 90～105 μ m fabric widths be the sheet material of 1.6～1.7m, with sheet material under 90～115 ℃ of conditions through two-stage single shaft longitudinal tensile fixture, stretching with draw ratio 3～5, to make fabric width be that 1.5～1.6m, thickness are the microporous membrane of 25～32 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 nonwoven polypropylene 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-layer nonwoven polypropylene fabric 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 between polypropylene fusing point and linear low density polyethylene and ethylene-octene copolymer fusing point than big-difference, 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 120～150 ℃, is preferably 130～140 ℃.
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 0.20～0.35cm
3/ cm
2.s, vapor transfer rate is up to 3700～3900g/m
2.24h, water resistance is up to 0.22～0.24MPa, and endwise tensile strength is 290～300N/5cm, and transverse tensile strength is 180～200N/5cm.
3-layer composite material of the present invention can be used for the wet bed course of waterproof and breathable of sloping formula roofing, also can be used for the Waterproof Breathable laying 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 water-ground limestone (particle diameter 3～5 μ m, Changxing, Zhejiang the earth novel material company limited, HT-1500) 150kg joins 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 (letter moral auxiliary reagent factory, Yizheng City, Jiangsu, TG-27) and titanic acid ester (Yizheng City, Jiangsu letter moral auxiliary reagent factory, TG-38s) each 1.5kg, after mixing 3min, add polypropylene (Maoming petro-chemical corporation, T30s) 70kg, linear low density polyethylene (Beijing Yanshan Petrochemical Co., 7402) 15kg and ethylene-octene copolymer (E.I.Du Pont Company, 8999) 15kg, dispersion agent is a linear high polysiloxane (Dow corning company, MB50) 2kg, lubricant is that (successful plastic material company limited can be matched in the changzhou to ethylene bis stearamide, E0243-25G) 2kg, stearic acid (the new chemical industry company limited for a long time in Shanghai, 1801) 1kg and oxidized polyethlene wax (sky, Nanjing poem micro mist company limited, PEW-0200) 1kg, 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 ℃, with this chilled compound parallel dual-screw (times Long Keya machinery company limited of Nanjing section, CTE-65) extrude air-cooled granulation in 110～200 ℃ of plasticizings, 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 110～230 ℃ 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 100 ± 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-layer nonwoven polypropylene fabric is through debatching, preheating is 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 145 ℃ (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 microporous membrane and the inside and outside two-layer 3-layer composite material of nonwoven polypropylene fabric that is in some hot pressing under the adhesive-free situation.
The Air permenbility of the 3-layer composite material that present embodiment is 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.
Embodiment 2
To cover holder soil (particle diameter 3～5 μ m, the Zhejiang safe wilkinite of Anji County gold company limited, JT-518) water-ground limestone in the 140kg alternate embodiment 1, with coupling agent vinyltrimethoxy silane (the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing, A-171) 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, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.The The performance test results of the 3-layer composite material of preparation sees Table 1 (testing method is described with embodiment 1).
Embodiment 3
With silicon-dioxide (particle diameter 3～6 μ m, Wuxi City gold ancient cooking vessel chemical industry company limited, HL150) water-ground limestone in the 160kg alternate embodiment 1, with coupling agent 3-mercaptopropyl trimethoxysilane (the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing, KH-580) coupling agent aluminic acid ester and the titanic acid ester in the 4kg alternate embodiment 1, polypropylene 70kg, linear low density polyethylene 10kg and ethylene-octene copolymer 10kg, dispersion agent ethylene-vinyl acetate copolymer (Canadian AT company, 3342AC) with linear each 1kg of high polysiloxane, all the other raw materials and used weight part, mix, granulation, curtain coating, the technological process of stretching preparation microporous membrane and preparation 3-layer composite material and condition are with embodiment 1.The The performance test results of the 3-layer composite material of preparation sees Table 1 (testing method is described with embodiment 1).
Embodiment 4
With kaolin (particle diameter 3～6 μ m, Suzhou City China Kaolin Co., Ltd, 1500) water-ground limestone in the 150kg alternate embodiment 1, with coupling agent 3-methacryloxypropyl trimethoxy silane (the permanent Fine Chemical Co., Ltd of the abundant moral in Nanjing, KH-570) coupling agent aluminic acid ester and the titanic acid ester in the 2kg alternate embodiment 1, polypropylene 80kg, linear low density polyethylene 15kg and ethylene-octene copolymer 15kg, 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, mix, granulation, curtain coating, the technological process of stretching preparation microporous membrane and preparation 3-layer composite material and condition are with embodiment 1.The The performance test results of the 3-layer composite material of preparation sees Table 1 (testing method is described with embodiment 1).
Comparative example 1
With polypropylene 70kg, linear low density polyethylene 15kg and the ethylene-octene copolymer 15kg in linear low density polyethylene 80kg and the ethylene-octene copolymer 20kg alternate embodiment 1, all the other raw materials, auxiliary agent and consumption, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.The The performance test results of 3-layer composite material of preparation and the test result of embodiment relatively see Table 1 (testing method is described with embodiment 1).
Comparative example 2
With polypropylene 70kg, linear low density polyethylene 15kg and the ethylene-octene copolymer 15kg in polypropylene 60kg, linear low density polyethylene 35kg and the ethylene-octene copolymer 5kg alternate embodiment 1, all the other raw materials, auxiliary agent and consumption, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.The The performance test results of 3-layer composite material of preparation and the test result of embodiment relatively see Table 1 (testing method is described with embodiment 1).
Comparative example 3
With polypropylene 70kg, linear low density polyethylene 15kg and the ethylene-octene copolymer 15kg in polypropylene 60kg, linear low density polyethylene 20kg and the ethylene-octene copolymer 20kg alternate embodiment 1, all the other raw materials, auxiliary agent and consumption, mixing, granulation, curtain coating, stretching prepare microporous membrane and the preparation technological process of 3-layer composite material and condition with embodiment 1.The The performance test results of 3-layer composite material of preparation and the test result of embodiment relatively see Table 1 (testing method is described with embodiment 1).
Table 1
| Air permenbility (cm 3/cm 2.s) | Vapor transfer rate (g/m 2?24h) | Resistance to hydrostatic pressure (MPa) | Vertical tension (N/5cm) | Horizontal tension (N/5cm) | |
| Embodiment 1 | ??0.28 | ??3900 | ??0.24 | ??300 | ??200 |
| Embodiment 2 | ??0.30 | ??3800 | ??0.23 | ??295 | ??190 |
| Embodiment 3 | ??0.31 | ??3870 | ??0.23 | ??292 | ??188 |
| Embodiment 4 | ??0.30 | ??3880 | ??0.22 | ??290 | ??195 |
| Comparative example 1 | ??0.30 | ??3750 | ??0.20 | ??260 | ??170 |
| Comparative example 2 | ??0.23 | ??2600 | ??0.25 | ??180 | ??120 |
| Comparative example 3 | ??0.26 | ??3500 | ??0.19 | ??270 | ??240 |
As shown in Table 1, the 3-layer composite material for preparing during for main body with the polypropylene of the used polymeric matrix of microporous membrane vertically and the tensile strength of the 3-layer composite material for preparing during with the linear low density polyethylene apparently higher than the used polymeric matrix of microporous membrane of transverse tensile strength for main body; The water resistance of the 3-layer composite material that the used polymeric matrix of microporous membrane prepares during for main body with the polypropylene also significantly improves.From the test result of four embodiment of table 1 as can be known, when used three kinds of polymkeric substance proportionings and auxiliary agent (coupling agent, dispersion agent and lubricant) within the scope of the present invention the time, every performance index of the 3-layer composite material for preparing under different mineral fillers (lime carbonate, cover holder soil, silicon-dioxide, the kaolin) situation all can reach gratifying degree.From three comparative examples of table 1 as can be known, when microporous membrane used polymkeric substance in middle layer did not contain polypropylene (comparative example 1), the vertical and horizontal tensile strength of the 3-layer composite material of preparation all significantly reduced; When three kinds of used polymkeric substance proportionings not within the scope of the present invention when (comparative example 2), because of the ethylene-octene copolymer in three kinds of polymkeric substance only is 5kg, make of the present invention some hot pressing composite effect poor, thereby the vertical and horizontal tensile strength that causes 3-layer composite material all descend and can't reach performance of the present invention significantly.Ethylene-octene copolymer consumption in three kinds of polymkeric substance is 20kg (comparative example 3), though ventilative, wet and tensile property is good thoroughly, resistance to hydrostatic pressure (being water resistance) significantly descends.
Claims (10)
1, a kind of 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 mixture of polypropylene, linear low density polyethylene and ethylene-octene copolymer.
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, 150 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 polypropylene, linear low density polyethylene and ethylene-octene copolymer is 70～80: 10～15: 10～15.
4, water-proof air-moisture-permeable microporous membrane according to claim 1 and 2, it is characterized in that described mineral filler is water-ground limestone, covers and hold in the palm soil, silicon-dioxide or kaolin, 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, particle diameter 2～8 μ m of silicon-dioxide, kaolinic particle diameter 1～7 μ m.
5, water-proof air-moisture-permeable microporous membrane according to claim 1 and 2 is characterized in that described coupling agent is one or more in aluminic acid ester, titanic acid ester, vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane and the 3-methacryloxypropyl trimethoxy silane; Described dispersion agent is one or both in linear high polysiloxane, the ethylene-vinyl acetate copolymer; Described lubricant is one or more in ethylene bis stearamide, stearic acid and the oxidized polyethlene wax.
6, water-proof air-moisture-permeable microporous membrane according to claim 5 is characterized in that described coupling agent is that aluminic acid ester and titanic acid ester weight proportion are a kind of in 1: 1 mixture or vinyltrimethoxy silane, 3-mercaptopropyl trimethoxysilane, the 3-methacryloxypropyl trimethoxy silane; Described dispersion agent is that linear high polysiloxane and ethylene-vinyl acetate copolymer weight proportion are 1: 1 mixture; Described lubricant is that ethylene bis stearamide, stearic acid and oxidized polyethlene wax weight proportion are 2: 1: 1 mixture.
7, a kind of method for preparing claim 1 or 2 described water-proof air-moisture-permeable microporous membranes may further comprise 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 above-mentioned raw materials successively with high-speed mixer and low speed mixer mix the back extruding pelletization, extruding curtain coating, to become 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 25～32 μ m.
8, a kind of 3-layer composite material of water-proof air-moisture-permeable, its middle layer are claim 1 or 2 described water-proof air-moisture-permeable microporous membranes, and two-layer inside and outside it is nonwoven polypropylene fabric.
9, a kind of method for preparing the described water-proof air-moisture-permeable 3-layer composite material of claim 8, 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-layer nonwoven polypropylene fabric composite structure, by between polypropylene fusing point and linear low density polyethylene and ethylene-octene copolymer fusing point than big-difference, the effect of the uniform projection of hot pressing roller roll surface structure and lining roller is the compound 3-layer composite material of making of some hot pressing under 120～150 ℃ the condition at hot combined temp.
10, the application of the described water-proof air-moisture-permeable 3-layer composite material of claim 8 in building field comprises as the wet bed course of the waterproof and breathable of sloping formula roofing, or as the Waterproof Breathable laying of skin dry-hang finishing material inboard.
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Effective date of registration: 20170727 Address after: 315470 Zhejiang city of Ningbo province Yuyao City Simen Town Si Bei Cun Patentee after: Ningbo Xi Yun new polymer materials Co. Ltd. Address before: 315458, Zhejiang, Yuyao Province town of lion mountain village Patentee before: Ningbo Shanquan Building Materials Co., Ltd. |