CN114456414A - Waterproof moisture-permeable film and preparation method thereof - Google Patents
Waterproof moisture-permeable film and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/40—Polyamides containing oxygen in the form of ether groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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Abstract
The invention relates to a waterproof moisture-permeable film which is provided as one layer or a plurality of layers arranged in sequence, wherein at least one layer comprises a polyamide elastomer, the waterproof moisture-permeable film has the water pressure resistance of 160-2And d. The waterproof moisture-permeable film provided by the invention has higher water pressure resistance and moisture-permeable flux, can be waterproof and can also be permeable to water vapor; abrasion resistance, and water pressure resistance and moisture permeation flux are basically kept unchanged along with the increase of the use times or the washing times; and has the advantages of static resistance, natural antibiosis, higher elasticity, low temperature resistance, deformation resistance, light specific gravity, and can be used in outdoor combat, medical treatment and health careThe method has wide application prospect in the fields such as the field and the like.
Description
Technical Field
The invention relates to the technical field of waterproof moisture-permeable films, in particular to a waterproof moisture-permeable film and a preparation method thereof.
Background
With the rapid development of the domestic and foreign fabric market and the continuous improvement of the consumption demand of people, the traditional fabric can not meet the diversified demand of consumers, and more functional fabrics are favored by the consumers.
The waterproof moisture-permeable film can not only block the permeation of rain and snow outside, but also effectively discharge sweat vapor generated by a human body, and has wide application prospect in the field of outdoor sportswear and protective clothing. Then, the existing waterproof moisture-permeable film cannot resist static electricity, is easy to generate a large amount of static electricity in dry seasons such as autumn and winter, and has low moisture permeability and poor applicability.
Disclosure of Invention
The invention aims to provide a waterproof moisture-permeable film and a preparation method thereof, and aims to solve the problems that the existing waterproof moisture-permeable film is easy to generate static electricity and low in moisture permeability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a waterproof moisture-permeable film is provided as one layer or a plurality of layers which are sequentially provided, at least one layer comprises a polyamide elastomer, the water pressure resistance of the waterproof moisture-permeable film is 160-2/d。
Preferably, the thickness of the waterproof moisture-permeable film is 5-10 μm, the tensile strength is more than 60mPa, and the breaking elongation is more than 450%.
A preparation method of a waterproof moisture-permeable film comprises the following steps:
s1: melting a polyamide elastomer;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (5) carrying out 1.05-1.5 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
Preferably, the melting temperature is from 150 ℃ to 180 ℃.
Preferably, the polyamide elastomer comprises: 50-70% of polyamide hard segment polymer units; 1-3% of ionic surfactant; 20-40% of soft block polymer units containing hydrophilic groups; 1-10% of molecular weight regulator; 3-5% of water; 0.3 to 0.5 percent of antioxidant; 1-5% of ethoxy lauryl tyramine.
Preferably, the polyamide hard segment polymer unit is a mixture of one or more of caprolactam, 11-aminoundecanoic acid and laurolactam which are mixed uniformly in any proportion.
Preferably, the ionic surfactant is one or a mixture of sodium dodecyl benzene sulfonate and sodium octadecyl benzene sulfonate which are mixed uniformly in any proportion.
Preferably, the soft segment polymer unit containing the hydrophilic group is a mixture of one or more of polyethylene glycol, polypropylene glycol, amino-terminated polyoxypropylene ether and amino-terminated polyoxyethylene ether which are mixed uniformly in any proportion.
Preferably, the molecular weight regulator is a mixture of one or more of terephthalic acid, adipic acid, hexamethylenediamine, dodecanedioic acid and isophthalic acid which are mixed uniformly in any proportion.
A preparation method of a polyamide elastomer of a waterproof moisture-permeable film comprises the following steps:
s1: weighing the raw materials according to the mass percentage;
s2: adding a polyamide hard segment polymer unit, an ionic surfactant, a soft segment polymer unit containing a hydrophilic group, a molecular weight regulator, water, an antioxidant and ethoxy lauryl tyramine into a reaction kettle, heating to 80-95 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2-4 hours;
s3: heating to 140 ℃ and 210 ℃ for polymerization, and mechanically stirring for reaction for 1-3 hours;
s4: heating to 240 ℃ and 280 ℃ for continuous polymerization, and mechanically stirring for reaction for 1-4 hours;
s5: vacuumizing to 0.2-2MPa, continuously mechanically stirring, and reacting for 1-3 hours to obtain the polyamide elastomer.
Compared with the prior art, the invention has the beneficial effects that:
the waterproof moisture-permeable film provided by the technical scheme has higher water pressure resistance and moisture-permeable flux, can be waterproof and can also be permeable to water vapor; abrasion resistance, and water pressure resistance and moisture permeation flux are basically kept unchanged along with the increase of the use times or the washing times; the antistatic natural antibacterial fabric has the advantages of static resistance, natural antibacterial property, high elasticity, low temperature resistance, deformation resistance and light specific gravity, and has wide application prospect in the fields of outdoor combat, medical treatment and health care and the like.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a waterproof moisture-permeable membrane, which mainly comprises a polyamide elastomer, wherein the polyamide elastomer is an engineering polymer, a thermoplastic elastomer without a plasticizer, and has a wide hardness range, good rebound resilience, easy processability and the properties of a polyamide product.
The invention also provides a preparation method of the waterproof moisture-permeable film, which comprises the following steps:
s1: melting a polyamide elastomer;
wherein, the polyamide elastomer is arranged in an extruder for melting, and the melting temperature is 150-180 ℃, preferably 160-170 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (5) carrying out 1.05-1.5 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
It can be understood that, the membrane obtained by blow molding is subjected to area stretching treatment, in the stretching process, macromolecules in the polyamide elastomer material are oriented in all directions, hydrogen bonds, dipole bonds and other intermolecular forces are increased, the number of molecular chains bearing external tension is increased, so that the tensile strength is obviously improved, the mechanical property is better, the elasticity is better, the low temperature resistance of the waterproof moisture-permeable membrane is improved due to the fact that the waterproof moisture-permeable membrane is subjected to area stretching, the yellowing resistance and the antistatic property are achieved, and the internal sectional area of the prepared waterproof moisture-permeable membrane is reduced due to the fact that the waterproof moisture-permeable membrane is subjected to area stretching by 1.05-1.5 times, so that the waterproof moisture-permeable membrane is thinner in unit area, lighter in weight and higher in applicability.
The waterproof moisture-permeable film provided by the present application will be further described with reference to examples.
Example one
The waterproof moisture-permeable film is prepared by the following method, and the steps are as follows:
s1: melt polymerizing polyamide elastomer in an extruder at 150 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) performing 1.05 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically comprises 50% of caprolactam, 1% of sodium dodecyl benzene sulfonate, 40% of polyethylene glycol, 2% of phthalic acid, 0.3% of antioxidant, 1% of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 80 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2 hours;
s3: heating to 140 ℃ for polymerization, and mechanically stirring for reaction for 1 hour;
s4: heating to 240 ℃ to continue polymerization, and mechanically stirring to react for 1 hour;
s5: vacuumizing to 0.2MPa, continuously mechanically stirring, and reacting for 1 hour to obtain the polyamide elastomer.
The performance of the waterproof moisture-permeable film obtained in the first example was tested under standard conditions, wherein the standard for the water pressure resistance test was JISL 1092A, and the standard for the moisture permeation flux test was JISL-1099B-1. Example one waterproof moisture-permeable film obtained had a water pressure resistance of 160kpa and a moisture-permeable flux of 150kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles to be 158kpa, and measuring the moisture-permeable flux to be 149kg/m2D; the waterproof moisture-permeable film was subjected to a water washing experiment, and the performance thereof was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 159kpa, and the moisture permeation flux was 149kg/m2/d。
Example two
S1: melting polyamide elastomer in an extruder at 160 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) performing 1.15 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically, 57% of laurolactam, 2% of sodium octadecylbenzene sulfonate, 35% of polypropylene glycol, 4% of isophthalic acid, 0.4% of antioxidant, 2% of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 83 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2.5 hours;
s3: heating to 155 ℃ for polymerization, and mechanically stirring for reaction for 1.5 hours;
s4: heating to 250 ℃ to continue polymerization, and mechanically stirring to react for 1.5 hours;
s5: vacuumizing to 0.5MPa, continuously mechanically stirring, and reacting for 1.5 hours to obtain the polyamide elastomer.
The performance of the waterproof moisture-permeable film obtained in example two was tested under standard conditions, with the standard for the water pressure resistance test being JISL 1092A and the standard for the moisture permeation flux test being JISL-1099B-1. The water pressure resistance of the waterproof moisture-permeable film obtained in example two was 165kpa, and the moisture permeation flux was 151kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles to be 164kpa, and measuring the moisture-permeable flux to be 149kg/m2D; the waterproof moisture-permeable film is subjected to a water washing experiment, and the performance of the waterproof moisture-permeable film is tested again after 50 times of water washing, so that the water pressure resistance of the waterproof moisture-permeable film is 164kpa, and the moisture permeation flux is 149kg/m2/d。
EXAMPLE III
S1: melting the polyamide elastomer in an extruder at 170 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) performing 1.35-time area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically 65% of caprolactam, 3% of sodium octadecyl benzene sulfonate, 22% of polypropylene glycol, 5% of isophthalic acid, 0.5% of antioxidant, 3% of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 87 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2.5 hours;
s3: heating to 168 ℃ for polymerization, and mechanically stirring for reaction for 2 hours;
s4: heating to 260 ℃ to continue polymerization, and mechanically stirring to react for 2.5 hours;
s5: vacuumizing to 1MPa, continuously mechanically stirring, and reacting for 2 hours to obtain the polyamide elastomer.
The performance of the waterproof moisture-permeable film obtained in example three was tested under standard conditions, with the standard for water pressure resistance test being JISL 1092A and the standard for moisture permeation flux test being JISL-1099B-1. The water pressure resistance of the waterproof moisture-permeable film obtained in example three is 170kpa, and the moisture permeation flux is 153kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles to be 168kpa, and measuring the moisture-permeable flux to be 152kg/m2D; the water washing experiment was carried out on the waterproof moisture-permeable film, and the performance thereof was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 169kpa, and the moisture permeation flux was 152kg/m2/d。
Example four
S1: melting a polyamide elastomer in an extruder at 175 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) performing 1.45-time area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically, the antioxidant comprises 68% of 11-aminoundecanoic acid, 1% of sodium dodecyl benzene sulfonate, 20% of amino-terminated polyoxypropylene ether, 6% of dodecanedioic acid, 0.5% of an antioxidant, 4% of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 92 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2.5 hours;
s3: heating to 181 ℃ for polymerization, and mechanically stirring for reaction for 1.5 hours;
s4: heating to 270 ℃ to continue polymerization, and mechanically stirring to react for 1 hour;
s5: vacuumizing to 1.5MPa, continuously mechanically stirring, and reacting for 3 hours to obtain the polyamide elastomer.
The waterproof moisture-permeable film obtained in example four was subjected to a test of its performance under standard conditions, with the standard for the water pressure resistance test being JISL 1092A and the standard for the moisture permeation flux test being JISL-1099B-1. The waterproof moisture-permeable film obtained in example four had a water pressure resistance of 175kpa and a moisture permeation flux of 154kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles, and measuring the moisture-permeable flux of the film to be 173kpa and 153kg/m2D; the waterproof moisture-permeable film was subjected to a water washing experiment, and the performance thereof was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 173kpa, and the moisture permeation flux was 152kg/m2/d。
EXAMPLE five
S1: melting a polyamide elastomer in an extruder at 175 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) carrying out 1.5-time area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically, 70% of laurolactam, 1% of sodium octadecyl benzene sulfonate, 20% of amino-terminated polyoxyethylene ether, 2% of hexamethylene diamine, 0.5% of antioxidant, 4% of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 95 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 4 hours;
s3: heating to 200 ℃ for polymerization, and mechanically stirring for reaction for 1 hour;
s4: heating to 280 ℃ to continue polymerization, and mechanically stirring to react for 2 hours;
s5: vacuumizing to 2MPa, continuously mechanically stirring, and reacting for 1 hour to obtain the polyamide elastomer.
The performance of the waterproof moisture-permeable film obtained in the fifth example was tested under standard conditions, with the standard for the water pressure resistance test being JISL 1092A and the standard for the moisture permeation flux test being JISL-1099B-1. The water pressure resistance of the waterproof moisture-permeable film obtained in example five is 180kpa, and the moisture permeation flux is 155kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film after 50 abrasion cycles again to be 179kpa, and measuring the moisture-permeable flux to be 154kg/m2D; the water washing experiment is carried out on the waterproof moisture-permeable membrane, the performance of the waterproof moisture-permeable membrane is tested again after 50 times of water washing, and the water pressure resistance of the waterproof moisture-permeable membrane is 179kpa, and the moisture-permeable flux is 153kg/m2/d。
EXAMPLE six
S1: melting a polyamide elastomer in an extruder at 175 ℃;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (4) performing 1.47 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
The polyamide elastomer is prepared by the following method, comprising the following steps:
s1: weighing raw materials; specifically, 64 percent of laurolactam, 1 percent of sodium octadecyl benzene sulfonate, 19 percent of amino-terminated polyoxyethylene ether, 2 percent of hexamethylene diamine, 0.5 percent of antioxidant, 4 percent of ethoxy lauryl tyramine and the balance of water;
s2: adding the raw materials into a reaction kettle, heating to 95 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 4 hours;
s3: heating to 197 ℃ for polymerization, and mechanically stirring for reaction for 1 hour;
s4: heating to 272 ℃ to continue polymerization, and mechanically stirring to react for 2 hours;
s5: vacuumizing to 2MPa, continuously mechanically stirring, and reacting for 1 hour to obtain the polyamide elastomer.
The performance of the waterproof moisture-permeable film obtained in example six was tested under standard conditions, with the standard for the water pressure resistance test being JISL 1092A and the standard for the moisture permeation flux test being JISL-1099B-1. Example six the waterproof moisture-permeable film obtained had a water pressure resistance of 177kpa with a moisture permeation flux of 152kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles, and measuring the moisture-permeable flux of the film to be 151kg/m2D; the waterproof moisture-permeable film was subjected to a water washing experiment, and the performance thereof was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 176kpa, and the moisture permeation flux was 151kg/m2/d。
Comparative example 1
A common waterproof moisture permeable membrane in the market is selected, and a waterproof moisture permeable membrane produced by Kunzshan Ainuo new material science and technology Limited is taken as an example.
The performance of the waterproof moisture-permeable film obtained in the comparative example is tested under standard conditions, wherein the standard of the water pressure resistance test is JISL 1092A, and the standard of the moisture permeation flux test is JISL-1099B-1. Comparative example A waterproof moisture-permeable film obtained had a water pressure resistance of 152kpa and a moisture-permeable flux of 130kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles to be 150kpa, and measuring the moisture-permeable flux to be 103kg/m2D; the water washing experiment was carried out on the waterproof moisture-permeable film, and the performance was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 151kpa, and the moisture permeation flux was 101kg/m2/d。
Comparative example No. two
A common waterproof moisture permeable film in the market is selected, and is taken as an example of a waterproof moisture permeable film produced by Dongguan cattail micro waterproof breathable film material Co.
The performance of the waterproof moisture-permeable film obtained in the comparative example II was tested under standard conditions, the standard for the water pressure resistance test was JISL 1092A, and the standard for the moisture permeation flux test was JISL-1099B-1. The waterproof moisture-permeable film obtained in comparative example II had a water pressure resistance of 150kpa and a moisture permeation flux of 67kg/m2D, taking a 10 cm-10 cm waterproof moisture-permeable film, carrying out abrasion test on the film, measuring the water pressure resistance of the film again after 50 abrasion cycles to be 147kpa, and measuring the moisture-permeable flux to be 62kg/m2D; the waterproof moisture-permeable film was subjected to a water washing experiment, and the performance thereof was tested again after 50 times of water washing, and it was found that the water pressure resistance of the waterproof moisture-permeable film was 144kpa, and the moisture permeation flux was 60kg/m2/d。
The waterproof moisture-permeable films obtained in the above examples and comparative examples were subjected to performance tests, respectively, and the results are shown in table 1:
TABLE 1
The embodiment shows that the waterproof moisture-permeable film has higher water pressure resistance and moisture-permeable flux, can be waterproof and can permeate water vapor; abrasion resistance, and water pressure resistance and moisture permeation flux are basically kept unchanged along with the increase of the use times or the washing times; the fabric has the advantages of static resistance, natural antibiosis, higher elasticity, low temperature resistance, deformation resistance and light specific gravity, and has wide application prospect in the fields of outdoor combat, medical treatment and health care and the like.
Wherein, when the waterproof moisture-permeable film is applied, different layers can be set according to the requirement.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The waterproof moisture-permeable film is characterized by being arranged into one layer or a plurality of layers which are arranged in sequence, at least one layer comprises a polyamide elastomer, the water pressure resistance of the waterproof moisture-permeable film is 160-2/d。
2. The waterproof moisture-permeable film according to claim 1, wherein the thickness of the waterproof moisture-permeable film is 5 to 10 μm, the tensile strength is more than 60mPa, and the elongation at break is more than 450%.
3. A method for preparing the waterproof moisture-permeable film according to any one of claims 1 to 2, comprising the steps of:
s1: melting a polyamide elastomer;
s2: blowing the molten polyamide elastomer prepared in the step S1 into a film;
s3: and (5) carrying out 1.05-1.5 times of area stretching treatment on the membrane obtained in the step (S2) to obtain the waterproof moisture-permeable membrane.
4. The method of claim 3, wherein the melting temperature is 150 ℃ to 180 ℃.
5. The waterproof moisture-permeable film according to claim 1, wherein the polyamide elastomer comprises: 50-70% of polyamide hard segment polymer units; 1-3% of ionic surfactant; 20-40% of soft block polymer units containing hydrophilic groups; 1-10% of molecular weight regulator; 0.3 to 0.5 percent of antioxidant; 1-5% of ethoxy lauryl tyramine and the balance of water.
6. The waterproof moisture-permeable film according to claim 5, wherein the polyamide hard segment polymer unit is one or a mixture of caprolactam, 11-aminoundecanoic acid and laurolactam which are mixed uniformly in any proportion.
7. The waterproof moisture-permeable film according to claim 5, wherein the ionic surfactant is one or more of sodium dodecyl benzene sulfonate and sodium octadecyl benzene sulfonate which are mixed uniformly in any proportion.
8. The waterproof moisture-permeable film according to claim 5, wherein the soft segment polymer unit containing the hydrophilic group is a mixture of one or more of polyethylene glycol, polypropylene glycol, amino-terminated polyoxypropylene ether and amino-terminated polyoxyethylene ether which are mixed uniformly in any proportion.
9. The waterproof moisture-permeable film according to claim 5, wherein the molecular weight regulator is a mixture of one or more of terephthalic acid, adipic acid, hexamethylenediamine, dodecanedioic acid and isophthalic acid mixed in any proportion.
10. A method for preparing a polyamide elastomer of the waterproof moisture-permeable membrane according to any one of claims 5 to 9, comprising the steps of:
s1: weighing the raw materials according to the mass percentage;
s2: adding a polyamide hard segment polymer unit, an ionic surfactant, a soft segment polymer unit containing a hydrophilic group, a molecular weight regulator, water, an antioxidant and ethoxy lauryl tyramine into a reaction kettle, heating to 80-95 ℃ under the protection of nitrogen for reaction, and mechanically stirring for 2-4 hours;
s3: heating to 140 ℃ and 210 ℃ for polymerization, and mechanically stirring for reaction for 1-3 hours;
s4: heating to 240 ℃ and 280 ℃ for continuous polymerization, and mechanically stirring for reaction for 1-4 hours;
s5: vacuumizing to 0.2-2MPa, continuously mechanically stirring, and reacting for 1-3 hours to obtain the polyamide elastomer.
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| CN104480639A (en) * | 2014-12-09 | 2015-04-01 | 东华大学 | Electrostatic spinning method and device of super-wear-resistant fiber-based waterproof moisture-permeable membrane |
| CN109897370A (en) * | 2019-02-25 | 2019-06-18 | 佛山金万达科技股份有限公司 | It is a kind of biology based elastomeric compositions and its preparation film and laminates |
| CN112695403A (en) * | 2020-12-11 | 2021-04-23 | 杭州津源新材料有限公司 | Antistatic polyamide elastomer spinning and processing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480639A (en) * | 2014-12-09 | 2015-04-01 | 东华大学 | Electrostatic spinning method and device of super-wear-resistant fiber-based waterproof moisture-permeable membrane |
| CN109897370A (en) * | 2019-02-25 | 2019-06-18 | 佛山金万达科技股份有限公司 | It is a kind of biology based elastomeric compositions and its preparation film and laminates |
| CN112695403A (en) * | 2020-12-11 | 2021-04-23 | 杭州津源新材料有限公司 | Antistatic polyamide elastomer spinning and processing method thereof |
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