CN112026281A - High-filtration type nano melt-blown fabric and manufacturing process thereof - Google Patents

High-filtration type nano melt-blown fabric and manufacturing process thereof Download PDF

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Publication number
CN112026281A
CN112026281A CN202010764464.5A CN202010764464A CN112026281A CN 112026281 A CN112026281 A CN 112026281A CN 202010764464 A CN202010764464 A CN 202010764464A CN 112026281 A CN112026281 A CN 112026281A
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CN
China
Prior art keywords
melt
blown
base layer
nano
blown fabric
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Pending
Application number
CN202010764464.5A
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Chinese (zh)
Inventor
钟振海
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Wenzhou Baide Medical Equipment Co ltd
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Wenzhou Baide Medical Equipment Co ltd
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Priority to CN202010764464.5A priority Critical patent/CN112026281A/en
Publication of CN112026281A publication Critical patent/CN112026281A/en
Pending legal-status Critical Current

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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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/30—Antimicrobial, e.g. antibacterial
    • A41D31/305—Antimicrobial, e.g. antibacterial using layered materials
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products 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 form; Layered products 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 form; Layered products 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
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
    • 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
    • D04H13/00—Other non-woven fabrics
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0223—Vinyl resin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0223—Vinyl resin fibres
    • B32B2262/023—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0223—Vinyl resin fibres
    • B32B2262/0238—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • 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
    • 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
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2555/00—Personal care

Abstract

The invention discloses high-filtration type nano melt-blown cloth applied to a medical (civil) mask, which comprises a melt-blown cloth base layer, wherein a nano fiber filter layer is arranged on the surface of the melt-blown cloth base layer. The manufacturing process comprises the following steps: the melt-blown fabric base layer is sequentially conveyed in a paving mode, a nanofiber filter layer is prepared and formed on the surface of the melt-blown fabric base layer in a spraying mode through an electrostatic spinning technology, and then the high-filtration type nano melt-blown fabric finished product is prepared through drying and sterilization. The invention is applied to a medical mask, effectively blocks PM0.3, is rich in nano-fiber and antibacterial components, and can keep longer-acting electrostatic effect on a melt-blown cloth base layer through a double-layer design. The air filter has the advantages of high efficiency of trapping and blocking particulate matters such as PM0.3 pollen, spray and hair in the air, realization of finer twice filtration, small breathing resistance in the use process, no generation of stronger stuffy feeling, and effective inhibition or killing of harmful viruses, germs and the like, thereby reducing the occurrence of anaphylactic reaction.

Description

High-filtration type nano melt-blown fabric and manufacturing process thereof
Technical Field
The invention relates to a protective article, in particular to melt-blown cloth for a medical (civil) mask and a manufacturing process thereof.
Background
At present, the melt-blown fabric is the heart of a medical (civil) mask, is used as a filter layer in the middle of the mask, and has good filterability, barrier property, heat preservation property and adsorbability. The special material for melt-blown fabric polypropylene is a core raw material for producing melt-blown fabric. The performance of the melt-blown fabric is related to the spinning process on one hand, and the special material for melt-blowing plays a key role in the performance of the melt-blown fabric on the other hand. The molten spray must have good fluidity and require additional special functions such as sterilization, anti-virus, etc. At present, high-melt index polypropylene is mostly selected for melt-blown material products to meet the flowability, and then some auxiliary agents are added to endow the melt-blown material products with the bactericidal lamp functionality, but the following problems exist: the better spinnability can be achieved only when the spinning temperature is higher; the electret treatment effect can not be guaranteed in the spinning process, and the electric quantity is uncontrollable. If electret melt-blown cloth is adopted, the corona discharge mode is adopted, so that the common melt-blown cloth is charged, and the trapping and filtering of particles are improved. However, the breathing resistance is high, the wearing comfort is low, once the electret effect of the melt-blown fabric is failed, the filtering efficiency is extremely reduced, the service time is short, and the applied medical mask has certain potential safety hazard.
Disclosure of Invention
The invention aims to overcome the defects and provide a high-filtration type nano melt-blown fabric which can realize finer filtration and can keep static electricity for a long time and effectively and a manufacturing process thereof.
The purpose of the invention is realized by the following technical scheme: the high-filtration type nano melt-blown fabric comprises a melt-blown fabric base layer, wherein a nano fiber filter layer is arranged on the surface of the melt-blown fabric base layer.
And a non-woven fabric layer is arranged on the outer surface of the nanofiber filtering layer.
The manufacturing process of the high-filtration type nano melt-blown fabric comprises the following steps: the melt-blown fabric base layer is sequentially conveyed in a paving mode, a nanofiber filter layer is prepared and formed on the surface of the melt-blown fabric base layer in a spraying mode through an electrostatic spinning technology, and then the high-filtration type nano melt-blown fabric finished product is prepared through drying and sterilization.
The preparation raw material of the nanofiber filter layer is a solution composed of one or more polymers of polyvinylidene fluoride, polyacrylonitrile, polyether sulfone resin, polystyrene and polytetrafluoroethylene and a solvent. The diameter of the nano-fiber in the nano-fiber filter layer is 8-1200 nm.
After the invention is adopted, a thinner and thinner hole channel is formed by the double-layer design of the melt-blown cloth base layer and the nano fiber filter layer, thereby effectively preventing charge drift and enabling the melt-blown cloth base layer to keep longer-acting electrostatic effect. The nano-fiber is produced by utilizing the electrostatic spinning technology, the diameter of the nano-fiber is between the unit number and 1 thousand nanometers, the pore size is large, the porosity is high, the specific surface area is large, and the melt-blown cloth base layer is provided with static electricity, so that the effect of blocking 0.3 mu m micro-particles is obvious. The invention is applied to a medical mask, effectively blocks PM0.3, is rich in nano-fiber and antibacterial components, has high trapping and blocking efficiency on PM0.3 pollen, spray, hair and other particles in the air, realizes more precise twice filtration, has small respiratory resistance in the use process, does not generate stronger stuffy feeling, can effectively inhibit or kill harmful viruses, germs and the like, and thus reduces the occurrence of anaphylactic reaction.
Drawings
FIG. 1 is a schematic structural diagram of a high-filtration nano meltblown fabric according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and embodiments.
Referring to fig. 1, the high-filtration type nano meltblown applied to a medical mask of the present invention includes a meltblown base layer 3, and a nanofiber filter layer 2 is disposed on a surface of the meltblown base layer 3. The outer surface of the nanofiber filter layer 2 is provided with a non-woven fabric layer 1 (as the inner side surface of the medical mask), namely, the nanofiber filter layer 2 is positioned between the meltblown fabric base layer 3 and the non-woven fabric layer 1. This nonwoven fabric layer 1 may also be a second meltblown nonwoven fabric layer (also a meltblown fabric material).
The manufacturing process of the high-filtration type nano melt-blown fabric comprises the following steps: the melt-blown fabric base layer (reel type) is sequentially paved and conveyed through unreeling treatment, a nanofiber filter layer is formed on the surface of the melt-blown fabric base layer in an electrostatic spinning technology spraying mode, and then the melt-blown fabric base layer is dried, sterilized and finally rolled to obtain a high-filtration type nano melt-blown fabric finished product. The reaction temperature, the extrusion spraying rate and the receiving distance in the electrostatic spinning technology are known technologies.
The preparation raw material of the nanofiber filter layer is a solution composed of one or a combination of several polymers of polyvinylidene fluoride (PVDF), Polyacrylonitrile (PAN), polyether sulfone resin (PES), Polystyrene (PS) and Polytetrafluoroethylene (PTFE) and a solvent (and an auxiliary agent). The diameter of the nano-fiber in the nano-fiber filter layer is 8-1200 nm. The gram weight of the melt-blown fabric base layer is 20-60g/m2(ii) a The nanofiber filter layer is in the shape of a membrane (also called nanofiber filter membrane), and the gram weight of the nanofiber filter layer is 1.0-3.0g/m2。
The testing particles are 0.3 mu m, and the air resistance of the medical (civil) mask applied by the high-filtration type nano melt-blown fabric is 50-150pa and the filtration effect is 95-99.9 percent through the test of a special tester, so the high-filtration type nano melt-blown fabric has obvious beneficial effect.

Claims (6)

1. High filtration formula nanometer melt-blown fabric, including melt-blown fabric basic unit (3), its characterized in that: and a nanofiber filter layer (2) is arranged on the surface of the melt-blown cloth base layer (3).
2. The high filtration nano meltblown of claim 1, wherein: the outer surface of the nanofiber filter layer (2) is provided with a non-woven fabric layer (1).
3. The process of claim 1, wherein the process comprises: the melt-blown fabric base layer is sequentially conveyed in a paving mode, a nanofiber filter layer is prepared and formed on the surface of the melt-blown fabric base layer in a spraying mode through an electrostatic spinning technology, and then the high-filtration type nano melt-blown fabric finished product is prepared through drying and sterilization.
4. The process of claim 3, wherein the process comprises: the preparation raw material of the nanofiber filter layer is a solution composed of one or more polymers of polyvinylidene fluoride, polyacrylonitrile, polyether sulfone resin, polystyrene and polytetrafluoroethylene and a solvent.
5. The process of claim 4, wherein the step of forming the high filtration nano meltblown fabric comprises: the diameter of the nano-fiber in the nano-fiber filter layer is 8-1200 nm.
6. The process of claim 3, 4 or 5, wherein the process comprises the steps of: the gram weight of the melt-blown fabric base layer is 20-60g/m2(ii) a The nanofiber filter layer is in a film shape, and the gram weight of the nanofiber filter layer is 1.0-3.0g/m2。
CN202010764464.5A 2020-07-25 2020-07-25 High-filtration type nano melt-blown fabric and manufacturing process thereof Pending CN112026281A (en)

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CN202010764464.5A CN112026281A (en) 2020-07-25 2020-07-25 High-filtration type nano melt-blown fabric and manufacturing process thereof

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Application Number Priority Date Filing Date Title
CN202010764464.5A CN112026281A (en) 2020-07-25 2020-07-25 High-filtration type nano melt-blown fabric and manufacturing process thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113209721A (en) * 2021-05-10 2021-08-06 上海柔维材料科技有限公司 Oily air filtering material and preparation method and application thereof
CN114394472A (en) * 2022-01-07 2022-04-26 华悦天恒(山东)医疗科技有限公司 High-filtration type nano melt-blown fabric and winding device thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113209721A (en) * 2021-05-10 2021-08-06 上海柔维材料科技有限公司 Oily air filtering material and preparation method and application thereof
CN114394472A (en) * 2022-01-07 2022-04-26 华悦天恒(山东)医疗科技有限公司 High-filtration type nano melt-blown fabric and winding device thereof

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