CN113621188A - PE breathable film with high strength and high barrier filtering performance and composite fabric thereof - Google Patents
PE breathable film with high strength and high barrier filtering performance and composite fabric thereof Download PDFInfo
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- CN113621188A CN113621188A CN202010383345.5A CN202010383345A CN113621188A CN 113621188 A CN113621188 A CN 113621188A CN 202010383345 A CN202010383345 A CN 202010383345A CN 113621188 A CN113621188 A CN 113621188A
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- 239000004698 Polyethylene Substances 0.000 claims abstract description 93
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- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 6
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
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- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
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- C—CHEMISTRY; METALLURGY
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a PE breathable film with high strength and high barrier filtering performance and a composite fabric thereof, wherein the thickness of the PE breathable film7-30 mu m, 20-100 s/100ml of air permeability, 40-70% of porosity, more than 2.0N of needling strength, more than 15N/25mm of longitudinal breaking strength, more than 15N/25mm of transverse breaking strength, more than 99.97% of filtering efficiency, more than 450cmH of antistatic pressure2And O. The preparation method of the PE breathable film comprises the following steps: blending polyethylene and a plasticizer by an extruder to form a homogeneous blend, and then sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film. The invention can greatly improve the problem of poor aperture consistency of the breathable film, improve the transverse mechanical strength of the breathable film, and simultaneously prolong the effective blocking path of the breathable film, thereby improving the filtration efficiency and reliability. Compared with the fabric compounded by the inorganic additive type breathable film, the composite fabric prepared by the PE breathable film has more excellent bidirectional mechanical strength and more efficient barrier and filtration performance.
Description
Technical Field
The invention belongs to the technical field of breathable films, and particularly relates to a PE breathable film with high strength and high barrier and filtration performance and a composite fabric thereof.
Background
At present, medical protective clothing is necessary protective clothing for ensuring the safety of medical staff, public health workers, patients, personnel entering infected areas due to hospital visits and the like, and has the functions of isolating germs, harmful ultrafine dust, acid-base solution and the like, ensuring the life and work safety of related personnel and keeping the environment clean. The performance indexes of the medical protective clothing mainly refer to protection, comfort, physical and mechanical properties and the like. Wherein, the protective property is the most important performance requirement of the medical protective clothing, and mainly comprises liquid barrier, microorganism barrier, barrier to particulate matters and the like; comfort mainly refers to breathability and moisture permeability. In order to enhance the protection effect, the fabric of the protective clothing is usually subjected to lamination or film covering treatment, is heavy, has poor air permeability and moisture permeability, and is poor in comfort when being worn by people for a long time. Meanwhile, the material of the medical protective clothing needs to resist tearing, puncture, abrasion and the like, so that a channel for the propagation of bacteria and viruses is avoided.
In the PE breathable film composite fabric of the medical protective clothing commonly used in the market, the breathable film mostly takes low-density or medium-density polyethylene as a substrate, 40-55% of inorganic filler (such as calcium carbonate, talcum powder and the like) is added, and the waterproof and breathable effects are realized by utilizing the microporous formed at the joint of inorganic filler particles and the plastic film substrate which is being shaped in the stretching process.
However, the gas permeable film formed in this way has the following problems:
1. due to the consistency of the particle size of inorganic filler particles, the degree of roundness and the like, the problems of non-uniform pore diameter, unstable filtering effect and the like exist, and the protective effect is influenced to a certain extent;
2. the air-permeable channel is stretched under the stress of the inorganic filler, the channel is simple, the effective blocking path is short, and the protective effect is also influenced to a certain extent;
3. the inorganic filler greatly reduces the mechanical strength of the breathable film, has weak performances such as stretching, puncturing and the like, is easy to damage in use and provides a channel for the propagation of bacteria and viruses.
4. After the inorganic filler is added, the mass production process mainly adopts unidirectional low-rate stretching, only longitudinal strength can be ensured, transverse strength is low, and actual requirements cannot be met.
Disclosure of Invention
In order to solve the problems of poor aperture consistency, low mechanical strength, particularly transverse strength, short blocking path and limited protection effect of the breathable film caused by inorganic filler, the invention aims to provide the PE breathable film with high strength and high blocking filtering performance, and the preparation process of the PE breathable film is similar to that of a wet lithium ion battery diaphragm and adopts a thermally induced phase separation method; the PE breathable film for protection is prepared on the basis of a wet diaphragm process improved formula and an optimized production process.
Another object of the present invention is to provide a process for producing the above PE breathable film.
Another object of the present invention is to provide a composite fabric of PE breathable films.
The purpose of the invention is realized by the following technical scheme.
The PE breathable film has the thickness of 7-30 mu m, the air permeability (GURLEY value) of 20-100 s/100ml, the porosity of 40-70 percent and the needling strength of more than 2.0NThe longitudinal breaking strength is higher than 15N/25mm, the transverse breaking strength is higher than 15N/25mm, the filtering efficiency is more than 99.97 percent, and the antistatic water pressure is higher than 450cmH2O (grade 4).
In the technical scheme, the average pore diameter of the PE breathable film is 40-60 nm.
In the technical scheme, the PE breathable film is prepared from polyethylene and a plasticizer.
In the technical scheme, the thickness of the PE breathable film is 7-16 mu m, the air permeability is 60-100 s/100ml, the porosity is 50-60%, the needling strength is above 3.0N, the longitudinal fracture strength is above 15N/25mm, the transverse fracture strength is above 15N/25mm, the filtration efficiency is above 99.97%, and the hydrostatic pressure resistance is 450-600 cmH2O。
A preparation method of a PE breathable film comprises the following steps:
blending polyethylene and a plasticizer by an extruder to form a homogeneous blend, and then sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film.
In the technical scheme, the weight average molecular weight of the polyethylene is 50-150 ten thousand.
In the above technical scheme, the plasticizer is paraffin oil.
In the technical scheme, the weight percentage of the polyethylene in the homogeneous blend is 20-40%, and the balance is the plasticizer.
In the technical scheme, the temperature of the extruder during blending is 130-230 ℃.
In the technical scheme, the extruder is a double-screw extruder, and the rotating speed of a screw is 30-150 rpm.
In the technical scheme, the temperature of the cast sheet is 10-50 ℃, and the speed of the cooling roller is 2-10 m/min.
In the technical scheme, the bidirectional stretching is longitudinal stretching and transverse stretching, the temperature of the longitudinal stretching is 90-125 ℃, and the magnification of the longitudinal stretching is 3-9 times; the temperature of transverse stretching is 105-130 ℃, and the magnification of transverse stretching is 5-10 times.
In the technical scheme, the extraction temperature is 20-25 ℃.
In the technical scheme, the heat setting temperature is 95-140 ℃.
A composite fabric of a PE breathable film is a single-layer or multi-layer non-woven fabric compounded on the PE breathable film.
In the above technical scheme, the compounding is to attach and bond the non-woven fabric and the PE breathable film.
In the above technical scheme, the bonding adopts an adhesive, the adhesive is a liquid hot melt adhesive or a hot melt adhesive net film, the liquid hot melt adhesive is directly coated on the surface of the non-woven fabric or the non-woven fabric is covered with the hot melt adhesive net film during the bonding, the PE breathable film is placed on the adhesive, and then the hot melt adhesive or the hot melt adhesive net film is hot-pressed at the bonding temperature.
In the above technical scheme, the hot melt adhesive is a polyurethane hot melt adhesive, an EVA hot melt adhesive, a polyester hot melt adhesive or a polyamide hot melt adhesive.
Compared with the fabric compounded by the inorganic additive type breathable film, the composite fabric prepared by the PE breathable film has more excellent bidirectional mechanical strength and more efficient barrier and filtration performance.
The invention can greatly improve the problem of poor aperture consistency of the breathable film, improve the transverse mechanical strength of the breathable film, and prolong the path effectively blocked by the breathable film at the same time, thereby improving the filtration efficiency and reliability.
Drawings
FIG. 1 is a scanning electron micrograph of the surface micropore structure of a PE breathable film prepared according to example A1;
FIG. 2 is a schematic structural view of comparative example A-1;
FIG. 3 is a scanning electron micrograph of a cross-section of a PE breathable film prepared according to example A1;
FIG. 4 is a scanning electron micrograph of a cross-section of a PE breathable film prepared according to example A1;
FIG. 5 is two schematic structural diagrams of a composite fabric of a PE breathable film;
FIG. 6 is a plot of the pore size distribution of the PE breathable film prepared in example A1;
FIG. 7 is a plot of the pore size distribution of the PE breathable film prepared in example A4.
Detailed Description
The technical scheme of the invention is further explained by combining specific examples.
The test apparatus and its model referred to in the following examples are: an electronic balance BSA224-CW, a thickness meter C1216, a tensile machine AGS-X-1KN, a tensile machine AGS-X-50N, a pressurized water type aperture analyzer AAQ-3K-A-1, a particulate matter filtration efficiency tester QJ-706C, a water permeability tester YG812DB and a water permeability tester QJ 601H-II.
Example A1
A preparation method of a PE breathable film comprises the following steps:
blending polyethylene and a plasticizer by a double-screw extruder to form a homogeneous blend, and sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film. The weight average molecular weight of the polyethylene is 120 ten thousand, and the plasticizer is paraffin oil; the homogeneous blend had 25 wt% polyethylene, the balance being plasticizer, by weight percent.
The temperature of the extruder during blending was 195 ℃ and the rotation speed of the screw of the extruder was 60 rpm.
The temperature of the cast piece was 15 ℃ and the cooling roll speed was 5.1 m/min.
The biaxial stretching is divided into longitudinal stretching and transverse stretching, the temperature of the longitudinal stretching is 116 ℃, and the magnification of the longitudinal stretching is 7.43 times; the temperature of the transverse stretching was 124 ℃ and the magnification of the transverse stretching was 9.3 times. The temperature of the extraction was 23 ℃. The heat-setting temperature was 130 ℃.
Example A2
A preparation method of a PE breathable film comprises the following steps:
blending polyethylene and a plasticizer by a double-screw extruder to form a homogeneous blend, and sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film.
The weight average molecular weight of the polyethylene is 120 ten thousand, and the plasticizer is paraffin oil; the homogeneous blend had 25 wt% polyethylene, with the remainder being plasticizer, by weight percent.
The temperature of the extruder during blending was 195 ℃ and the rotation speed of the screw of the extruder was 60 rpm.
The temperature of the cast piece is 15 ℃, and the speed of the cooling roller is 5.4 m/min; the biaxial stretching is longitudinal stretching and transverse stretching, the temperature of the longitudinal stretching is 116 ℃, and the magnification of the longitudinal stretching is 7.6 times; the temperature of transverse stretching is 125 ℃, and the magnification of transverse stretching is 9.3 times; the temperature of extraction is 23 ℃; the heat-setting temperature was 131 ℃.
Example A3
A preparation method of a PE breathable film comprises the following steps:
blending polyethylene and a plasticizer by a double-screw extruder to form a homogeneous blend, and sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film.
The weight average molecular weight of the polyethylene is 120 ten thousand, and the plasticizer is paraffin oil; the homogeneous blend had 28 wt% polyethylene, with the remainder being plasticizer, by weight percent.
The temperature of the extruder during blending was 195 ℃ and the rotation speed of the screw of the extruder was 68 rpm.
The temperature of the cast piece is 15 ℃, and the speed of the cooling roller is 4.6 m/min; the biaxial stretching is longitudinal stretching and transverse stretching, the temperature of the longitudinal stretching is 118 ℃, and the magnification of the longitudinal stretching is 7 times; the temperature of transverse stretching is 126 ℃, and the doubling rate of transverse stretching is 9.3 times; the temperature of extraction is 23 ℃; the heat-setting temperature was 130 ℃.
The specific production method of the comparative examples A-1 and A-2 is the same as that of a continuous PE breathable film provided by the patent with the application number of 201110097335.6, and the specific production method of the polyethylene/calcium carbonate continuous PE breathable film comprises the steps of putting the polyethylene/calcium carbonate/additive into a mixer according to the corresponding proportion, uniformly mixing, feeding into a feeding section of a mixing roll, heating, melting and plasticizing, continuously extruding into a film through a die lip gap of a die head, and winding into a product through a forming device, a longitudinal drawing device, a shaping device, a thickness gauge, a traction device and a winding device.
Samples of breathable films of two specifications prepared by the process are taken as comparative examples A-1 and A-2;
the test results of the PE breathable films obtained in the above examples and comparative examples are shown in table 1.
TABLE 1
The moisture permeability is carried out according to a method A specified in GB/T12704-1991, the water impermeability is carried out according to a static water pressure test specified in GB/T4744-1997, the filtration efficiency is carried out according to a test method specified in GB 19082-20095.7, the breaking strength is carried out according to a test method of tensile property of a plastic sheet specified in ASTM D882, and the needling strength is tested by referring to a test method of GB/T36363-2018
A needle head for testing the force required to pierce the product at a speed of 250 mm/min; air permeability data were obtained using a joker air permeameter EG01-55-1MR test.
As can be seen from FIGS. 1 and 2, the product obtained in comparative example A-1 had poor consistency of inorganic particles, non-uniform pore size distribution, and excessive local permeability. The PE breathable film obtained by the invention has small aperture and uniform distribution.
As shown in fig. 3 and 4, the holes in the thickness direction are zigzag and through, so that the blocking path of the particles and bacteria can be prolonged.
As can be seen from FIGS. 6 and 7, the pore size distribution of the PE breathable film is centered at 30nm to 70nm, and the average pore size is 40 to 60 nm.
Examples a2-A3 can achieve technical effects consistent with example a 1.
As can be seen from Table 1, the PE breathable film has the thickness of 9-16 μm, the air permeability (GURLEY value) of 60-100 s/100ml, the porosity of 40-50%, the needling strength of over 2.0N, and the transverse and longitudinal breaking strength of over 15N/25mm, and has remarkable advantages in transverse breaking strength compared with comparative examples A-1 and A-2; because the pore diameter is uniform and far smaller than that of the conventional breathable membrane, the filtration efficiency of the PE breathable membrane is over 99.97 percent.
The test results of only a part of the embodiments are shown in the example of table 1, and in the actual production, the thickness of the PE breathable film can be adjusted between 7 and 30 μm, the breathable value can be adjusted between 20 and 100s, and the porosity can be adjusted between 40 and 70% by adjusting the process parameters (feeding speed, production speed and the like).
The PE breathable film has waterproof and breathable performance and efficient blocking and filtering performance, and as can be seen from a surface electron microscope image, a cross-sectional electron microscope image and a water-pressing method pore size distribution histogram, the breathable film has uniform micropore structures in the transverse direction, the longitudinal direction and the thickness direction, micropores are communicated in a zigzag mode and have certain tortuosity, blocking paths of particles, bacteria and the like can be prolonged, filtering efficiency is improved, bidirectional strength is uniform, and the problem that a conventional diaphragm in the market is low in transverse strength can be solved.
Generally, various inorganic additives are added into the conventional breathable film to serve as pore formers so as to achieve the waterproof and breathable functions, but multiple experiments show that the PE breathable film with better performance can be prepared by only taking plasticizers such as paraffin oil as pore formers and removing the paraffin oil through an extraction process after stretching without adding the inorganic additives, and various performance indexes of the protective clothing can be met.
The PE breathable film can achieve low air permeability, high transverse and longitudinal two-way strength and high barrier filtration efficiency, and hydrostatic pressure test results are obviously superior to those of inorganic breathable films.
The adhesives used in the following examples B1-B3 were hot melt adhesive webs, the hot melt adhesive being a polyurethane hot melt adhesive.
Example B1
A single-layer 30gsm (basis weight 30 g/m) composite fabric of a PE breathable film prepared in example A1 was bonded to the PE breathable film by using an adhesive at a bonding temperature of 90 DEG C2) The adhesive is a hot melt adhesive net film, namely, the hot melt adhesive net film (the basis weight is 23 g/m) is directly covered on one surface of the non-woven fabric2) Placing PE gas-permeable membrane on hot melt adhesive net membrane, and hot-pressing at 90 deg.C for compounding to realize bonding of PE gas-permeable membrane and non-woven fabric by adhesive, such asAs shown in fig. 5.
Example B2
As shown in FIG. 5, a composite fabric of a breathable PE film, the breathable PE film prepared in example A2 was bonded to a single layer of 30gsm (basis weight 30 g/m) with an adhesive at a bonding temperature of 90 deg.C2) The adhesive is a hot melt adhesive net film, namely, the hot melt adhesive net film (the basis weight is 23 g/m) is directly covered on one surface of the non-woven fabric2) And placing the PE breathable film on the hot melt adhesive net film, and performing hot-pressing compounding at 90 ℃ to realize that the PE breathable film and the non-woven fabric are attached and bonded through the adhesive.
Example B3
As shown in FIG. 5, a composite fabric of a breathable PE film, the breathable PE film prepared in example A3 was bonded with a double layer of 30gsm (basis weight 30 g/m) by using an adhesive at a bonding temperature of 90 deg.C2) The adhesive is a hot melt adhesive net film, namely, one surface of the non-woven fabric is directly covered with a layer of hot melt adhesive net film (the basis weight is 23 g/m)2) The PE breathable film is placed on the hot melt adhesive net film, the hot melt adhesive net film is placed on the PE breathable film, the non-woven fabric is placed on the hot melt adhesive net film, hot-pressing compounding is carried out at 90 ℃, namely the PE breathable film and the non-woven fabric are attached and bonded through the adhesive, and the overall structure diagram is shown as the structure on the left in the figure 5.
Comparative example B-1: the commercially available disposable medical protective clothing fabric 1 is prepared by adding inorganic CaCO3The permeable membrane of (2) is compounded with 30g/m of adhesive on one side2The adhesive is a hot melt adhesive net film, and the hot melt adhesive is a polyurethane hot melt adhesive.
Comparative example B-2: the commercially available disposable medical protective clothing fabric 2 is prepared by adding inorganic CaCO3The two sides of the permeable membrane are compounded by 30g/m of adhesive2The adhesive is a hot melt adhesive net film, and the hot melt adhesive is a polyurethane hot melt adhesive.
The tests of examples B1-B3 and comparative examples B-1 and B-2 were carried out, and the test results are shown in Table 2.
TABLE 2
The moisture permeability is carried out according to a method A specified in GB/T12704-1991, the water impermeability is carried out according to a static water pressure test specified in GB/T4744-1997, the filtration efficiency is carried out according to a test method specified in GB 19082-20095.7, the breaking strength is carried out according to a strip method specified in GB/T3923.1-1997, and the needling strength is tested by referring to a GB/T36363-2018 test
A needle head for testing the force required to pierce the product at a speed of 250 mm/min; air permeability data were obtained using a joker air permeameter EG01-55-1MR test.
Compared with the fabric compounded by the inorganic additive type breathable film, the composite fabric prepared by the PE breathable film has more excellent bidirectional mechanical strength and more efficient barrier and filtration performance.
After coating with the breathable film of the present invention:
1. the air permeability (GURLEY value) of the protective fabric is obviously lower than that of the fabric compounded by the conventional breathable film, and the wearing comfort of people is higher;
2. the transverse and longitudinal fracture strength is close, and the transverse fracture strength is greatly higher than that of a conventional breathable film, so that the reliability of the protective fabric is greatly improved;
3. the filtration efficiency test value is more than 99.97%, and is remarkably improved compared with the conventional breathable film coated fabric;
4. the hydrostatic pressure resistant effect is advantageous.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The PE breathable film is characterized by being 7-30 microns thick, 20-100 s/100ml in air permeability, 40-70% in porosity, more than 2.0N in needling strength, more than 15N/25mm in longitudinal fracture strength and more than 15N/25mm in transverse fracture strengthThe strength is higher than 15N/25mm, the filtering efficiency is more than 99.97 percent, and the antistatic water pressure is higher than 450cmH2O。
2. The PE breathable film according to claim 1, wherein the average pore size of the PE breathable film is 40 to 60 nm.
3. The PE breathable film of claim 1, wherein the PE breathable film is prepared from polyethylene and a plasticizer.
4. The PE breathable film according to claim 1, wherein the PE breathable film has a thickness of 7-16 μm, an air permeability of 60-100 s/100ml, a porosity of 50-60%, a needle punching strength of 3.0N or more, a longitudinal fracture strength of 15N/25mm or more, a transverse fracture strength of 15N/25mm or more, a filtration efficiency of 99.97% or more, and an anti-hydrostatic pressure of 450-600 cmH2O。
5. A process for preparing a PE breathable film according to claim 1, comprising the steps of:
blending polyethylene and a plasticizer by an extruder to form a homogeneous blend, and then sequentially carrying out sheet casting, biaxial stretching, extraction, heat setting and rolling on the homogeneous blend to obtain the PE breathable film.
6. The method of claim 5, wherein the plasticizer is paraffin oil.
7. The method according to claim 5, wherein the polyethylene has a weight average molecular weight of 50 to 150 ten thousand;
according to the mass percentage, the polyethylene in the homogeneous blend accounts for 20-40 wt%, and the balance is the plasticizer;
the temperature of the extruder during blending is 130-230 ℃;
the extruder is a double-screw extruder, and the rotating speed of a screw is 30-150 rpm;
the temperature of the cast sheet is 10-50 ℃, and the speed of the cooling roller is 2-10 m/min.
8. The preparation method according to claim 5, wherein the biaxial stretching is longitudinal stretching and transverse stretching, the temperature of the longitudinal stretching is 90-125 ℃, and the magnification of the longitudinal stretching is 3-9 times; the temperature of transverse stretching is 105-130 ℃, and the magnification of transverse stretching is 5-10 times;
the extraction temperature is 20-25 ℃;
the heat setting temperature is 95-140 ℃.
9. A composite fabric of a PE breathable film, which is characterized in that the PE breathable film of claim 1 is compounded with a single-layer or multi-layer non-woven fabric.
10. The composite fabric according to claim 9, wherein the compounding is carried out by adhering the nonwoven fabric and the PE breathable film;
the adhesive is a liquid hot melt adhesive or a hot melt adhesive net film, the liquid hot melt adhesive is directly coated on the surface of the non-woven fabric or the non-woven fabric is covered with the hot melt adhesive net film during the adhesion, the PE breathable film is placed on the adhesive, and then the hot pressing is carried out at the adhesion temperature of the liquid hot melt adhesive or the hot melt adhesive net film;
the hot melt adhesive is polyurethane hot melt adhesive, EVA hot melt adhesive, polyester hot melt adhesive or polyamide hot melt adhesive.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206106503U (en) * | 2016-08-13 | 2017-04-19 | 江阴恒和无纺布制品有限公司 | It reaches medical protection clothes by fabric one -tenth of this protection to spout gluey protection cloth |
| CN108484964A (en) * | 2018-04-28 | 2018-09-04 | 青岛蓝科途膜材料有限公司 | High-strength polyethylene microporous barrier, preparation method and its application |
| CN109517213A (en) * | 2018-11-13 | 2019-03-26 | 中国科学技术大学 | A kind of polyethylene waterproof moisture permeable membrane and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206106503U (en) * | 2016-08-13 | 2017-04-19 | 江阴恒和无纺布制品有限公司 | It reaches medical protection clothes by fabric one -tenth of this protection to spout gluey protection cloth |
| CN108484964A (en) * | 2018-04-28 | 2018-09-04 | 青岛蓝科途膜材料有限公司 | High-strength polyethylene microporous barrier, preparation method and its application |
| CN109517213A (en) * | 2018-11-13 | 2019-03-26 | 中国科学技术大学 | A kind of polyethylene waterproof moisture permeable membrane and preparation method thereof |
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Application publication date: 20211109 |