CN106835592B - Hydrophobic melt-blown fabric with rough surface and preparation method thereof - Google Patents

Hydrophobic melt-blown fabric with rough surface and preparation method thereof Download PDF

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Publication number
CN106835592B
CN106835592B CN201710036963.0A CN201710036963A CN106835592B CN 106835592 B CN106835592 B CN 106835592B CN 201710036963 A CN201710036963 A CN 201710036963A CN 106835592 B CN106835592 B CN 106835592B
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melt
hot rolling
blown
hydrophobic
fabric
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CN106835592A (en
Inventor
王洪
张磊
靳向煜
吴海波
刘嘉炜
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Donghua University
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Donghua University
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C23/00—Making patterns or designs on fabrics
    • D06C23/04—Making patterns or designs on fabrics by shrinking, embossing, moiréing, or crêping
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters

Abstract

The invention discloses a hydrophobic melt-blown fabric with a rough surface and a preparation method thereof. The surface of the melt-blown fabric has a concave-convex rough structure, so that the melt-blown fabric has better hydrophobic property. The preparation method comprises the following steps: clamping the melt-blown cloth in two layers of screens with the mesh number of 300-700 meshes; feeding the screen/melt-blown cloth/screen into a hot rolling mill for hot rolling; and taking out the hot-rolled melt-blown cloth from the two layers of screens to obtain the hydrophobic melt-blown cloth with the concave-convex rough structure on the surface. According to the invention, the screen mesh is lined in the hot rolling process, and the uneven rough structure is formed while the hairiness on the surface of the melt-blown fabric is rolled flat, so that the surface roughness of the melt-blown fabric is greatly improved, the contact angle of the melt-blown fabric is increased, and the melt-blown fabric after hot rolling has a better hydrophobic effect.

Description

Hydrophobic melt-blown fabric with rough surface and preparation method thereof
Technical Field
The invention relates to a hydrophobic melt-blown fabric with a rough surface and a preparation method thereof
Background
The lotus leaf effect was proposed by the botanic agent william batroxide at the university of bourne, germany, in the 70 s of the 20 th century. The lotus leaf effect mainly refers to the super-hydrophobic (superhydrophobicity) and self-cleaning (self-cleaning) characteristics of the lotus leaf surface. The lotus leaves have hydrophobic surfaces, so that rainwater falling on the leaf surfaces can form water drops under the action of surface tension, the contact angle of the water and the leaf surfaces is larger than 150 degrees, and the water drops can roll off the leaf surfaces as long as the leaf surfaces are slightly inclined. Bartolone microscopically finds that the lotus leaf has a layer of hairy hairs and a plurality of tiny waxy particles on the surface, and water on the nanometer-scale tiny particles cannot diffuse to other directions of the lotus leaf surface, but forms individual small water drops. From the lotus leaf effect water repellency principle, a material with high water repellency has two basic conditions: firstly, the surface of the material must have basic water-repellent property; and simultaneously has a surface with certain roughness.
Examples of superhydrophobic surfaces are not known in nature, such as lotus leaves, rice leaves, wings of cicadas, and legs of water striders, etc. The search and development of novel materials with super-hydrophobic properties are always the subject of attention and one of the hot spots of research in the field of bionics for many years. The super-hydrophobic fabric is popular with people due to excellent special performances such as adhesion resistance, stain resistance and self-cleaning, and can be widely applied to rain-proof/stain-proof outdoor clothing, diving suit, interior decoration fabric, camping tent, military combat uniform, industrial waterproof cloth, medical and sanitary textiles and the like.
Polypropylene itself is a non-toxic, odorless, tasteless, milky-white, highly crystalline polymer that is particularly stable to water, with a water absorption of only 0.01% in water and little water absorption. The diameter of the melt-blown fabric taking polypropylene as a main raw material can reach 1-5 microns, and the number and the surface area of fibers in unit area can be increased by the superfine fibers with unique capillary structures, so that the melt-blown fabric has good air permeability and good water repellency.
In recent years, water-repellent breathable fabrics are increasingly demanded in industry and life, and researchers adopt various methods to treat the surfaces of the fabrics so as to achieve ideal water-repellent breathable effects. The existing super-hydrophobic treatment for melt-blown cloth mainly comprises the steps of coating or dipping a layer of super-hydrophobic coating on the surface of the cloth, so that the surface of the cloth has low surface energy, and meanwhile, the pore diameter of the melt-blown cloth is reduced, so that the melt-blown cloth achieves the super-hydrophobic effect. However, these treatments often cause problems such as poor air permeability of meltblown fabric, hard fabric surface and large thickness.
Many researches show that the surface with the micro-nano rough structure is an important reason for forming the super-hydrophobic effect. The roughness of the surface of the material is improved, a larger contact angle can be obtained to a certain extent, and a better hydrophobic effect is obtained.
Disclosure of Invention
The invention aims to solve the problems of low porosity, poor air permeability, large thickness and hard surface of the melt-blown fabric caused by a common hydrophobic treatment method.
In order to solve the above problems, the present invention provides a hydrophobic meltblown having a rough surface, characterized in that the surface of the meltblown has a rough structure, which imparts better hydrophobic properties to the meltblown.
Preferably, the melt-blown fabric has a fiber diameter of 2 to 4 μm and a surface roughness parameter Ra of 0.03 to 0.3. mu.m.
Preferably, the material of the melt-blown fabric is any one of polypropylene, polyester, polyamide and polylactic acid.
More preferably, the material of the melt-blown fabric is polypropylene.
The invention also provides a preparation method of the hydrophobic melt-blown fabric with the rough surface, which is characterized by comprising the following specific steps:
the first step is as follows: clamping the melt-blown cloth in two layers of screens with the mesh number of 300-700 meshes;
the second step is that: feeding the screen/melt-blown cloth/screen in the first step into a hot rolling mill for hot rolling;
the third step: and taking out the melt-blown fabric subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown fabric with the concave-convex rough structure on the surface.
Preferably, the material of the screen in the first step is stainless steel or fiber woven fabric.
Preferably, the hot rolling mill in the second step is a hot plate mill or a hot roll mill; when a flat plate hot rolling mill is adopted, the pressure is 2-4MPa, and the time is 10-20 s; when a hot roll mill is used, the line pressure is 1.0X 103-3.0×103N/cm, and the speed is 10-70 m/min.
Preferably, the hot rolling temperature in the second step is 15-50 ℃ below the melting point of the polymer used for the meltblown fabric.
According to the invention, the screen mesh is lined in the hot rolling process, and the uneven rough structure is formed while the hairiness on the surface of the melt-blown fabric is rolled flat, so that the surface roughness of the melt-blown fabric is greatly improved, the contact angle of the melt-blown fabric is increased, and the melt-blown fabric after hot rolling has a better hydrophobic effect.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below.
The invention selects the arithmetic mean deviation Ra of the contour as an evaluation parameter of the surface roughness of the melt-blown fabric, and the definition of Ra is as follows: the mean arithmetic deviation of the absolute value of the distance from each point on the contour to the centerline within a sample length. The method comprises the steps of obtaining a surface scanning image of a sample by using a laser confocal microscope, obtaining a height coding image of the sample by using a computer image processing technology, and obtaining a profile curve and a surface roughness Ra value of the sample by using a computer-aided image analysis technology.
Example 1
The first step is as follows: clamping polypropylene melt-blown cloth with the fiber diameter of 2 mu m in a stainless steel screen with two layers of meshes of 300 meshes;
the second step is that: the screen/meltblown web/screen of the first stage was fed to a line pressure of 1.0X 103Hot rolling in a smooth roll hot rolling mill with the speed of 10m/min and the temperature of 110 ℃ in N/cm;
the third step: and taking out the melt-blown cloth subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown cloth with the surface having the concave-convex rough structure, wherein Ra is 0.3 mu m.
Example 2
The first step is as follows: the polyethylene terephthalate (one of polyester polymers) with the fiber diameter of 4 mu m is clamped in a stainless steel screen with 700 meshes in two layers;
the second step is that: the screen/meltblown web/screen of the first stage was fed to a line pressure of 3.0X 103Hot rolling in a smooth roll hot rolling mill with the speed of 70m/min and the temperature of 180 ℃ in N/cm;
the third step: and taking out the melt-blown cloth subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown cloth with the surface having the concave-convex rough structure, wherein Ra is 0.03 mu m.
Example 3
The first step is as follows: clamping polylactic acid melt-blown cloth with the fiber diameter of 3 mu m in two nylon woven screens with 500 meshes;
the second step is that: feeding the screen/melt-blown cloth/screen in the first step into a flat plate hot rolling mill with the pressure of 2-4MPa, the time of 10s and the temperature of 130 ℃ for hot rolling;
the third step: and taking out the melt-blown cloth subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown cloth with the surface having the concave-convex rough structure, wherein Ra is 0.1 mu m.
Example 4
The first step is as follows: clamping polylactic acid melt-blown cloth with the fiber diameter of 3 mu m in two nylon woven screens with 500 meshes;
the second step is that: feeding the screen/melt-blown cloth/screen in the first step into a flat plate hot rolling mill with the pressure of 2-4MPa, the time of 10s and the temperature of 130 ℃ for hot rolling;
the third step: and taking out the melt-blown cloth subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown cloth with the surface having the concave-convex rough structure, wherein Ra is 0.1 mu m.
Example 5
The first step is as follows: nylon 6 (one of polyamide polymers) with the fiber diameter of 2.5 mu m is melt-blown cloth and is clamped in a stainless steel screen with two layers of 400 meshes;
the second step is that: the screen/meltblown web/screen of the first stage was fed to a line pressure of 2.0X 103Hot rolling in a smooth roll hot rolling mill with the speed of 50m/min and the temperature of 170 ℃ in N/cm;
the third step: and taking out the melt-blown cloth subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown cloth with the surface having the concave-convex rough structure, wherein Ra is 0.2 mu m.

Claims (2)

1. A hydrophobic meltblown having a roughened surface, wherein the meltblown surface has a rough, concavo-convex texture; the fiber diameter of the melt-blown fabric is 2.5-4 mu m, and the surface roughness parameter Ra is 0.1-0.3 mu m; the preparation method of the hydrophobic melt-blown fabric with the rough surface comprises the following specific steps:
the first step is as follows: clamping the melt-blown cloth in two layers of screens with the mesh number of 300-700 meshes;
the second step is that: feeding the screen/melt-blown cloth/screen in the first step into a hot rolling mill for hot rolling;
the third step: taking out the melt-blown fabric subjected to the hot rolling in the second step from the two layers of screens to obtain the hydrophobic melt-blown fabric with the concave-convex rough structure on the surface;
the material of the melt-blown fabric is any one of polypropylene, polyester, polyamide and polylactic acid;
the hot rolling mill in the second step is a flat plate hot rolling mill or a roller type hot rolling mill; when a flat plate hot rolling mill is adopted, the pressure is 2-4MPa, and the time is 10-20 s; when a hot roll mill is used, the line pressure is 1.0X 103-3.0×103N/cm at a speed of 10-70m/min,
the hot rolling temperature in the second step is 15-50 ℃ lower than the melting point of the polymer used for the meltblown fabric.
2. The hydrophobic meltblown having a rough surface according to claim 1 wherein the screen of the first step is made of stainless steel or a woven fiber fabric.
CN201710036963.0A 2017-01-17 2017-01-17 Hydrophobic melt-blown fabric with rough surface and preparation method thereof Active CN106835592B (en)

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Publication number Priority date Publication date Assignee Title
CN111607902A (en) * 2020-04-30 2020-09-01 广东顺事德智能科技有限公司 Hydrophobic melt-blown fabric with rough surface and preparation method thereof
CN115354445A (en) * 2022-08-24 2022-11-18 江苏英伟医疗有限公司 Hydrophobic melt-blown fabric with rough surface and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338513A (en) * 2007-07-05 2009-01-07 福懋兴业股份有限公司 Method of preparing embossed electric cloth
CN101851069A (en) * 2010-02-11 2010-10-06 浙江工业大学 Method for preparing polymer super-hydrophobic surface by using screen template method
CN105297176A (en) * 2015-11-20 2016-02-03 东华大学 Superfine fiber material with rough surface and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003129363A (en) * 2001-10-26 2003-05-08 Kuraray Co Ltd Stretchable ultrafine fiber nonwoven fabric
JP4227630B2 (en) * 2002-07-31 2009-02-18 大和紡績株式会社 Wiper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338513A (en) * 2007-07-05 2009-01-07 福懋兴业股份有限公司 Method of preparing embossed electric cloth
CN101851069A (en) * 2010-02-11 2010-10-06 浙江工业大学 Method for preparing polymer super-hydrophobic surface by using screen template method
CN105297176A (en) * 2015-11-20 2016-02-03 东华大学 Superfine fiber material with rough surface and preparation method thereof

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