CN115742507A - Novel waterproof breathable material and preparation method thereof - Google Patents
Novel waterproof breathable material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a novel waterproof breathable material, which comprises a melt-blown non-woven fabric layer, a waterproof breathable film layer and a bottom non-woven fabric layer from top to bottom, wherein the melt-blown non-woven fabric layer and the waterproof breathable film layer are compounded by co-extrusion or glue application bonding to form a composite layer; the composite layer and the bottom non-woven fabric layer are compounded through gluing and bonding; the melt-blown non-woven fabric layer, the waterproof breathable film layer and the bottom non-woven fabric layer are all adhered to each other through the electrostatic electret enhanced layer. The novel waterproof breathable material disclosed by the invention has the advantages of simple process, reduced cost, improved tensile shrinkage and tensile strength, improved durability and processability, better suitability for different application scenes and the like.
Description
Technical Field
The invention relates to the field of waterproof and breathable materials, in particular to a novel waterproof and breathable material and a preparation method thereof.
Background
As the updating of textile materials iterates, more and more relevant practitioners are beginning to focus on materials with waterproof and breathable functions. Waterproof and breathable materials are often applied to various industries such as medical treatment, clothing, sanitary products and the like, and are one of popular materials which are researched and developed by various large enterprises.
The invention patent CN 110901188A discloses a filtering type non-woven fabric, wherein a composite filtering material is prepared by fixing a PTFE membrane in the middle of a double-combined non-woven fabric, and three layers of materials are combined into a whole in a double-fixing mode of gluing adhesion and hot roller adhesion.
The invention patent CN 114619731A discloses a breathable waterproof film, which comprises a polyester, nylon or polypropylene substrate and a nanofiber layer prepared by electrostatic spinning and arranged on the substrate, wherein an electrospinning solution used for electrostatic spinning contains various additives and alcohols, and the breathable waterproof film has good breathability and waterproofness, but the electrostatic spinning process is complex and inefficient, and the mass production difficulty is large.
Disclosure of Invention
The object of the present invention is to provide a new waterproof breathable material and a method for its preparation, solving one or more of the above mentioned prior art problems.
The invention provides a novel waterproof breathable material, which comprises a melt-blown non-woven fabric layer, a waterproof breathable film layer and a bottom non-woven fabric layer from top to bottom,
the melt-blown non-woven fabric layer and the waterproof breathable film are compounded to form a composite layer;
the composite layer is compounded with the bottom non-woven fabric layer;
the melt-blown non-woven fabric layer, the waterproof breathable film layer and the bottom non-woven fabric layer are all adhered to each other through the electrostatic electret enhanced layer.
In some embodiments of the present invention, the substrate is,
the melt-blown non-woven fabric layer and the waterproof breathable film are compounded through co-extrusion or gluing bonding;
and the composite layer and the bottom non-woven fabric layer are compounded through gluing and bonding.
In some embodiments, the novel waterproof breathable material has an areal density of 10 to 50g/m 2 The thickness of the composite material is 0.05-0.5 mm, and the composite material is pressed under the positive pressure of 100-150Pa (the test area is 20 cm) 2 ) The air permeability is 10-60 mm/s, and the air permeability resistance is 100-500 Pa at the flow rate of 32L/min.
In some embodiments, the novel waterproof breathable material has an areal density of 10 to 40g/m 2 The thickness of the composite material is 0.05-0.25 mm, and the composite material is pressed under the positive pressure of 100-150Pa (the test area is 20 cm) 2 ) The air permeability is 15-40 mm/s, and the air permeability resistance is 100-250 Pa under the flow rate of 32L/min.
In some embodiments, the melt-blown nonwoven fabric layer is composed of single-component melt-blown fibers or multi-component melt-blown fibers, and the areal density of the melt-blown nonwoven fabric layer is 5 to 25g/m 2 The average fineness of the melt-blown fiber is 0.3 to 5 mu m,
the single-component melt-blown fiber is made of one kind of engineering plastic, the multi-component melt-blown fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA.
In some embodiments, the waterproof breathable membrane is an e-PTFE microporous membrane, and the waterproof breathable membrane has an areal density of 0.5 to 5g/m 2 。
In some embodiments, the bottom nonwoven layer is an SMS nonwoven or other soft nonwoven including spunlace nonwoven, spunbond nonwoven, meltblown nonwoven, needle punched nonwoven, and through air nonwoven, and is preferably an SMS nonwoven.
In some embodiments, the SMS nonwoven fabric is composed of single component fibers or multicomponent fibers, and the SMS nonwoven fabric has an areal density of 5 to 20g/m 2 ，
The single-component fiber is made of one kind of engineering plastic, the multi-component fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA.
A preparation method of a novel waterproof breathable material comprises the following steps:
respectively preparing melt-blown non-woven fabrics for manufacturing the melt-blown non-woven fabric layer, a waterproof breathable film for manufacturing a waterproof breathable film layer and bottom non-woven fabrics for manufacturing a bottom non-woven fabric layer;
synchronously conveying the melt-blown non-woven fabric and the waterproof breathable film, wherein the melt-blown non-woven fabric is arranged above the waterproof breathable film;
the composite melt-blown non-woven fabric and the waterproof breathable film form a composite layer;
synchronously conveying the composite layer and the bottom non-woven fabric, wherein the bottom non-woven fabric is arranged below the composite layer;
the composite layer is connected with the non-woven fabric at the bottom in a composite mode to form composite fabric;
conveying the composite cloth to electret equipment for electrostatic electret treatment;
cutting and rolling to form the novel waterproof breathable material.
In some embodiments, the melt-blown nonwoven fabric and the waterproof breathable film are compounded through co-extrusion or sizing bonding; and the composite layer and the bottom non-woven fabric layer are compounded through gluing and bonding.
The novel waterproof breathable material and the preparation method thereof have the advantages that:
1. the invention directly compounds the melt-blown non-woven fabric, the waterproof breathable film and the bottom non-woven fabric, and the process is simple;
2. according to the invention, the melt-blown non-woven fabric and the waterproof breathable film are compounded, the composite film with high air permeability and high permeability is formed by comprehensively utilizing the high thickness, high air permeability, low permeability resistance and the ultrathin, low air permeability and high permeability resistance of the waterproof breathable film of the melt-blown non-woven fabric, and compared with the conventional melt-blown non-woven fabric, the extensibility of the melt-blown non-woven fabric can be improved by more than 50%, so that the melt-blown non-woven fabric is more suitable for the field of medical treatment and hygiene;
3. the melt-blown non-woven fabric, the waterproof breathable film and the bottom non-woven fabric are compounded, so that the tensile shrinkage and tensile strength are improved to a certain extent, and the durability and the processability are improved;
4. the novel waterproof breathable material formed by the invention has good air permeability and impermeability resistance, and can be better suitable for different application scenes, such as: building roof water-proof, heat-insulating layer steam-isolating, etc., and has wide application range;
5. the novel waterproof breathable material provided by the invention needs to be subjected to electrostatic electret treatment after the compounding, so that the bonding force between materials of each layer can be effectively enhanced, the use of hot melt adhesive is effectively reduced, the environmental protection is improved, and the cost is effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a novel waterproof and breathable material according to some embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
With reference to the content shown in fig. 1, the present embodiment provides a novel waterproof breathable material, which includes, from top to bottom, a meltblown nonwoven fabric layer 1, a waterproof breathable film layer 3, and a bottom nonwoven fabric layer 4, wherein the meltblown nonwoven fabric layer 1 and the waterproof breathable film layer 3 are combined by co-extrusion or adhesive bonding to form a composite layer; the composite layer is bonded and compounded with the bottom non-woven fabric layer 4 through glue application;
the melt-blown non-woven fabric layer 1, the waterproof breathable film layer 3 and the bottom non-woven fabric layer 4 are all enhanced through the adhesive force between the layers.
The surface density of the novel waterproof breathable material is 10-50 g/m 2 The thickness of 0.05-0.5 mm, and the positive pressure of 100-150Pa (the test area is 20 cm) 2 ) The air permeability is 10-60 mm/s, and the air permeability resistance is 100-500 Pa under the flow rate of 32L/min.
Furthermore, the surface density of the novel waterproof breathable material is 10-40 g/m 2 The thickness of the composite material is 0.05-0.25 mm, and the composite material is pressed under the positive pressure of 100-150Pa (the test area is 20 cm) 2 ) The air permeability is 15-40 mm/s, and the air permeability resistance is 100-250 Pa under the flow rate of 32L/min.
The national standard leakage value of the baby diaper is 0-0.5 g after the basement membrane in the existing baby diaper is replaced by the novel waterproof breathable material described in the specification.
The melt-blown non-woven fabric layer 1 is composed of single-component melt-blown fiber or multi-component melt-blown fiber, and the areal density of the melt-blown non-woven fabric layer 1 is 5 to 25g/m 2 The average fineness of the melt-blown fiber is 0.3 to 5 mu m, wherein
The single-component melt-blown fiber is made of one kind of engineering plastic, the multi-component melt-blown fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA. The waterproof breathable film 3 is an e-PTFE microporous film, and the areal density of the waterproof breathable film 3 is 0.5-5g/m 2 。
The bottom non-woven fabric layer 4 is an SMS non-woven fabric or other soft non-woven fabrics, the other soft non-woven fabrics comprise spunlace non-woven fabrics, spun-bonded non-woven fabrics, melt-blown non-woven fabrics, needle-punched non-woven fabrics and hot air non-woven fabrics, the bottom non-woven fabric layer 4 is preferably an SMS non-woven fabric, wherein
The SMS non-woven fabric is composed of single-component fiber or multi-component fiber, and has an areal density of 5-20g/m 2 The single-component fiber is made of one kind of engineering plastic, the multi-component fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA.
The novel waterproof breathable material can be prepared by the following preparation method, and the preparation method comprises the following steps:
s1, respectively preparing melt-blown non-woven fabrics for manufacturing a melt-blown non-woven fabric layer 1, a waterproof breathable film for manufacturing a waterproof breathable film layer 3 and bottom non-woven fabrics for manufacturing a bottom non-woven fabric layer 4;
s2, synchronously conveying the melt-blown non-woven fabric and the waterproof breathable film, wherein the melt-blown non-woven fabric is arranged above the waterproof breathable film;
s3, co-extruding or gluing and bonding the melt-blown non-woven fabric and the waterproof breathable film to form a composite layer;
s4, synchronously conveying the composite layer and the bottom non-woven fabric, wherein the bottom non-woven fabric is arranged below the composite layer;
s5, gluing, bonding and compounding the composite layer and the bottom non-woven fabric to form composite cloth;
s6, conveying the composite cloth to electret equipment for electrostatic electret treatment;
and S7, cutting and rolling to form the novel waterproof breathable material.
The preparation method adopts sizing to bond the compounded layers, so that a sizing layer 2 shown in figure 1 is formed between the layers. The preparation method of the e-PTFE microporous membrane in the waterproof breathable membrane 3 comprises the following steps:
(1) screening the polytetrafluoroethylene fine powder and the extrusion aid by mixing and curing, and removing agglomerates generated after curing;
(2) compacting and rolling the cured material obtained in the step (1) to obtain a base film, wherein the temperature of a rolling roller is set to be 35-55 ℃;
(3) degreasing the base film obtained in the step (2), removing the extrusion aid and fully expanding the base film;
(4) longitudinally stretching and transversely stretching the degreased base film obtained in the step (3), wherein the longitudinal stretching multiple is 6-10 times, the temperature is 100-300 ℃, the transverse stretching multiple is 11-15 times, and the temperature is 150-350 ℃;
(5) and (5) performing heat setting on the base membrane stretched in the step (4) to obtain the e-PTFE microporous membrane, wherein the setting temperature is 350-400 ℃, and the setting speed is 20-40 m/min.
The e-PTFE microporous membrane can also be prepared by other existing preparation methods.
Example 1
The surface density of the novel waterproof breathable material is 21g/m 2 The thickness is 0.15mm, wherein the melt-blown non-woven fabric layer is composed of polypropylene PP fibers, the average fineness of the fibers is 2.5 mu m, and the surface density is 8g/m 2 (ii) a The surface density of the e-PTFE microporous membrane is 3g/m 2 (ii) a The SMS non-woven fabric layer is composed of polypropylene PP fibers and has the surface density of 8g/m 2 . The meltblown nonwoven fabric layer and the SMS nonwoven fabric layer may be made of polypropylene PP fibers, which are not described herein.
Example 2
The surface density of the novel waterproof breathable material is 27g/m 2 And the thickness is 0.19mm, wherein the melt-blown non-woven fabric layer is composed of polypropylene PP fibers, the average fineness of the fibers is 3 mu m, and the surface density is 10g/m 2 (ii) a The surface density of the e-PTFE microporous membrane is 2g/m 2 (ii) a The SMS non-woven fabric layer is composed of polypropylene PP fibers and has the surface density of 13g/m 2 . The meltblown nonwoven fabric layer and the SMS nonwoven fabric layer may be made of polypropylene PP fibers, which are not described herein.
Example 3
The surface density of the novel waterproof breathable material is 19g/m 2 And the thickness is 0.13mm, wherein the melt-blown non-woven fabric layer is composed of polypropylene PP fibers, the average fineness of the fibers is 5 mu m, and the surface density is 8g/m 2 (ii) a The surface density of the e-PTFE microporous membrane is 1g/m 2 (ii) a The SMS non-woven fabric layer is composed of polypropylene PP fibers and has the surface density of 8 g-m 2 . The meltblown nonwoven fabric layer and the SMS nonwoven fabric layer may be made of polypropylene PP fibers, which are not described herein.
The above examples 1 to 3 are all solutions for disposable sanitary articles.
Example 4
The surface density of the novel waterproof breathable material is 47g/m 2 And the thickness is 0.45mm, wherein the melt-blown non-woven fabric layer is composed of polyester PET fibers, the average fineness of the fibers is 3 mu m, and the surface density is 23g/m 2 (ii) a The surface density of the e-PTFE microporous membrane is 3g/m 2 (ii) a The bottom non-woven fabric layer is spunlace fabric made of polyester PET fibers and has an areal density of 20g/m 2 . The melt-blown non-woven fabric and the spunlace fabric are the existing materials which can be directly made of polyester PET fibers, and therefore, the details are not described herein.
Example 5
The surface density of the novel waterproof breathable material is 44g/m 2 And the thickness is 0.3mm, wherein the melt-blown non-woven fabric layer is composed of bicomponent PE/PP fibers, the average fineness of the fibers is 2 mu m, and the surface density is 20g/m 2 (ii) a The surface density of the e-PTFE microporous membrane is 5g/m 2 (ii) a The bottom non-woven fabric layer is spun-bonded fabric consisting of bi-component PE/PP fibers, and the areal density is 18g/m 2 . The melt-blown nonwoven fabric and the spun-bonded fabric are the existing materials which can be directly formed by two-component PE/PP fibers, and therefore, the details are not repeated herein.
Comparative example 1
The surface density of a polyethylene PE (polyethylene) breathable casting film (a conventional bottom film material of a baby diaper) is 17g/m 2 。
Comparative example 2
8g/m 2 Polypropylene PP melt-blown non-woven fabric and 8g/m 2 The polypropylene SMS non-woven fabric is compounded by sizing with the sizing amount of 1.5g/m 2 The average fineness of the melt-blown fibers was 5 μm.
The materials of the five examples and the two comparative examples are tested for tensile breaking strength, elongation at break, air permeability resistance and permeability, and the five materials are used as the bottom film of the paper diaper to be made into a finished product, and then the finished product is tested for national standard leakage value, and the relevant data of the test are shown in the following table 1.
Tensile breaking strength and elongation at break test standards: part 3 of the test method for nonwovens in textiles according to ISO 9073-3-1989 determination of breaking strength and elongation;
material air permeability test equipment and corresponding parameters: YG461H type full automatic air permeability tester with pressure difference of 125Pa and test area of 20cm 2 The test method is according to the standard test method of ASTM D737-2018 textile fabric air permeability;
the material ventilation resistance test equipment and corresponding parameters are as follows: the TSI 8130 automatic filter material tester tests the flow rate of 32L/min and aerosol of 0.3 mu mNaCl;
material permeability test the material remains impermeable for a length of time in a static state and a moving (shaker) state, respectively, when loaded with a volume of solution;
leakage value: tested according to the leak test method of GB/T28004.1-2021.
TABLE 1
The results presented in table 1 show that the tensile strength of the present invention is improved compared to comparative examples 1 and 2, the air permeability is between the two, which is more than one hundred times the air permeability of comparative example 1, and the air permeability resistance is much lower than that of comparative example 1; the invention is also superior to comparative examples 1 and 2 in the aspect of permeability, the material can achieve the impermeability duration of more than 1h in both the standing state and the moving state, and is also obviously superior to the other two materials in the leakage value test result of the finished product of the paper diaper, so that the invention can completely meet the use standard in the application field, and the performance of the invention is even completely superior to that of the existing application material (comparative example 1); example the surface density and porosity of the e-PTFE microporous membrane were changed by changing the stretching ratio, and it was found from the test data that the air permeability decreased with the increase in the density of the e-PTFE microporous membrane, but the improvement in the leakage resistance was not significant, so that example 3 was the best of the five examples in terms of economic efficiency and performance.
The above description is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various similar changes and modifications can be made without departing from the inventive concept, and these should be considered as the protection scope of the present invention.
Claims (10)
1. A novel waterproof breathable material is characterized by comprising a melt-blown non-woven fabric layer (1), a waterproof breathable film layer (3) and a bottom non-woven fabric layer (4) from top to bottom,
the melt-blown non-woven fabric layer (1) and the waterproof breathable film (3) are compounded to form a composite layer;
the composite layer is compounded with the bottom non-woven fabric layer (4);
the melt-blown non-woven fabric layer (1), the waterproof breathable film layer (3) and the bottom non-woven fabric layer (4) are all enhanced through the adhesive force between the layers by the electrostatic electret.
2. The novel waterproof breathable material according to claim 1,
the melt-blown non-woven fabric layer (1) and the waterproof breathable film (3) are compounded through co-extrusion or gluing bonding; the composite layer and the bottom non-woven fabric layer (4) are compounded through gluing and bonding.
3. The novel waterproof breathable material of claim 1, wherein the areal density of the novel waterproof breathable material is 10-50 g/m 2 The thickness is 0.05-0.5 mm, the air permeability is 10-60 mm/s under the positive pressure of 100-150Pa, and the air permeability resistance is 100-500 Pa under the flow rate of 32L/min.
4. The novel waterproof breathable material according to claim 3, wherein the areal density of the novel waterproof breathable material is 10-40 g/m 2 The thickness is 0.05-0.25 mm, the air permeability is 15-40 mm/s under the positive pressure of 100-150Pa, and the air permeability resistance is 100-250 Pa under the flow rate of 32L/min.
5. The novel waterproof and breathable material as claimed in claim 1The melt-blown non-woven fabric layer (1) is composed of single-component melt-blown fibers or multi-component melt-blown fibers, and the areal density of the melt-blown non-woven fabric layer (1) is 5-25 g/m 2 The average fineness of the melt-blown fiber is 0.3 to 5 mu m,
the single-component melt-blown fiber is made of one kind of engineering plastic, the multi-component melt-blown fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA.
6. The novel waterproof breathable material according to claim 1, wherein the waterproof breathable film (3) is an e-PTFE microporous film, and the areal density of the waterproof breathable film (3) is 0.5-5g/m 2 。
7. A novel waterproof and breathable material according to claim 1, wherein said bottom non-woven fabric layer (4) is SMS non-woven fabric or other soft non-woven fabric, said other soft non-woven fabric comprises spunlace non-woven fabric, spun bond non-woven fabric, melt blown non-woven fabric, needle punched non-woven fabric and hot air non-woven fabric, said bottom non-woven fabric layer (4) is preferably SMS non-woven fabric.
8. The novel waterproof and breathable material as claimed in claim 7, wherein the SMS non-woven fabric is composed of single-component fiber or multi-component fiber, and the surface density of the SMS non-woven fabric is 5-20g/m 2 ，
The single-component fiber is made of one kind of engineering plastic, the multi-component fiber is made of two or more kinds of engineering plastics, and the kinds of the engineering plastics comprise polypropylene PP, polyethylene PE, polyester PET and polylactic acid PLA.
9. The preparation method of the novel waterproof breathable material is characterized by comprising the following steps of:
respectively preparing melt-blown non-woven fabrics for manufacturing the melt-blown non-woven fabric layer (1), waterproof breathable films for manufacturing the waterproof breathable film layers (3) and bottom non-woven fabrics for manufacturing the bottom non-woven fabric layer (4);
synchronously conveying the melt-blown non-woven fabric and the waterproof breathable film, wherein the melt-blown non-woven fabric is arranged above the waterproof breathable film;
the composite melt-blown non-woven fabric and the waterproof breathable film form a composite layer;
synchronously conveying the composite layer and the bottom non-woven fabric, wherein the bottom non-woven fabric is arranged below the composite layer;
the composite layer is connected with the non-woven fabric at the bottom in a composite mode to form composite fabric;
conveying the composite cloth to electret equipment for electrostatic electret treatment;
cutting and rolling to form the novel waterproof breathable material.
10. The preparation method of claim 9, wherein the melt-blown non-woven fabric and the waterproof breathable film are compounded through co-extrusion or size bonding; the composite layer and the bottom non-woven fabric are compounded through gluing and bonding.
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|---|---|---|---|---|
| CN116537472A (en) * | 2023-03-29 | 2023-08-04 | 山东泰鹏环保材料股份有限公司 | Waterproof breathable non-woven wallpaper with random three-dimensional structure and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116537472A (en) * | 2023-03-29 | 2023-08-04 | 山东泰鹏环保材料股份有限公司 | Waterproof breathable non-woven wallpaper with random three-dimensional structure and preparation method thereof |
| CN116537472B (en) * | 2023-03-29 | 2024-04-16 | 山东泰鹏环保材料股份有限公司 | Waterproof breathable non-woven wallpaper with random three-dimensional structure and preparation method thereof |
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