CN113306240A - Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same - Google Patents

Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same Download PDF

Info

Publication number
CN113306240A
CN113306240A CN202110514533.1A CN202110514533A CN113306240A CN 113306240 A CN113306240 A CN 113306240A CN 202110514533 A CN202110514533 A CN 202110514533A CN 113306240 A CN113306240 A CN 113306240A
Authority
CN
China
Prior art keywords
melt
blown
layer
meltblown
fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110514533.1A
Other languages
Chinese (zh)
Inventor
林芳兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andanda Industrial Technology Shanghai Co ltd
Original Assignee
Andanda Industrial Technology Shanghai Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andanda Industrial Technology Shanghai Co ltd filed Critical Andanda Industrial Technology Shanghai Co ltd
Priority to CN202110514533.1A priority Critical patent/CN113306240A/en
Publication of CN113306240A publication Critical patent/CN113306240A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
    • 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
    • A41D31/12—Hygroscopic; Water retaining
    • A41D31/125—Moisture handling or wicking function through 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
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • 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
    • D04H1/40—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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—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 by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—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 by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple 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
    • B32B2262/0253—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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • 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
    • 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
    • B32B2535/00—Medical equipment, e.g. bandage, prostheses, catheter

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention provides a high-efficiency low-resistance melt-blown material, which comprises M layers of melt-blown cloth, wherein M is more than or equal to 2, the diameter of fibers forming the melt-blown cloth is gradually increased from the 1 st layer to the M layer, and the porosity of the melt-blown cloth is gradually increased; the fiber diameter of the No. 1 layer is not less than 0.3 μ M, and the fiber diameter of the No. M layer is not more than 15 μ M; the material is prepared by a method comprising the following steps: a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter; b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted; c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters; d. the stacked meltblown webs were collected.

Description

Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same
Technical Field
The invention relates to the field of medical and health fiber materials, in particular to the field of melt-blown cloth, and particularly relates to multilayer melt-blown cloth with different melt-blown fiber diameters, a preparation method of the multilayer melt-blown cloth, and an air filtering device and a mask with the multilayer melt-blown cloth.
Background
The melt-blown fabric has good filtering property, shielding property, heat insulation property and oil absorption property, and can be widely used in the fields of air and liquid filtering materials, isolating materials, absorbing materials, mask materials, heat-insulating materials, oil-absorbing materials, wiping cloth and the like.
The melt-blown cloth is the most core material in medical masks, N95 masks and KN95 masks. The filtration effect of meltblown fabric is related to the diameter of the fibers forming the meltblown fabric and the amount of static electricity attached to the fibers. Usually, to obtain a better filtering effect, the fiber diameter of the meltblown is controlled to be very fine, e.g. the fiber fineness is controlled to be between 2 and 5 μm.
In the prior art, the fiber diameter is generally controlled to be the same when producing meltblown fabrics, such as meltblown fabrics used for making masks, the fiber diameter is controlled to be, for example, 2-5 μm, and the breathing resistance of the meltblown fabric is generally large when the required filtering effect is achieved, such as more than 95%; for example, the latest national standard for respiratory protection products, GB2626-2019, states: the inhalation resistance of the KN95 disposable mask is less than or equal to 210Pa, and the exhalation resistance is less than or equal to 210 Pa. When people wear the standard mask, people always feel that the breathing is not smooth enough.
In addition, the filter element in the air filter device is formed by adopting the melt-blown cloth prepared by the prior art, so that the ventilation resistance is large, and the energy consumption is increased.
SUMMARY OF THE PATENT FOR INVENTION
In order to improve the comfort of people using respiratory protection products containing melt-blown cloth or reduce the ventilation resistance of an air filtering device, the invention provides a high-efficiency low-resistance melt-blown material which is characterized by comprising M layers of melt-blown cloth, wherein M is more than or equal to 2, the diameter of fibers forming the melt-blown cloth is gradually increased from the 1 st layer of melt-blown cloth to the M th layer of melt-blown cloth, and the porosity of the melt-blown cloth is gradually increased; wherein the fiber diameter of the 1 st layer is not less than 0.3 μ M, and the fiber diameter of the Mth layer is not more than 15 μ M; the high-efficiency low-resistance melt-blown material is prepared by a method comprising the following steps:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
The invention also provides an air filtering device, which is characterized in that a filter core of the air filtering device is made of the high-efficiency low-resistance melt-blown material provided by the invention.
The invention also provides a mask which is characterized by comprising a water-blocking outer layer, a melt-blown cloth intermediate layer and a moisture-absorbing inner layer, wherein the melt-blown cloth intermediate layer is made of the high-efficiency low-resistance melt-blown material provided by the invention.
The invention also provides a continuous preparation method of the multilayer melt-blown fabric with different melt-blown fiber diameters, which is characterized by comprising the following steps:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
The invention provides meltblown fabrics with different fiber diameters, which reduce the ventilation resistance without reducing the filtering effect, for example, the filtering effect of the meltblown fabric is higher than 98%, and the inspiration resistance and the expiration resistance are lower than 60 Pa; the respiratory resistance is far lower than the inhalation resistance of KN95 disposable mask specified in the latest national standard GB2626-2019 and is less than or equal to 210Pa, and the exhalation resistance is less than or equal to 210 Pa.
The air filtering equipment prepared by the melt-blown fabric provided by the invention has lower energy consumption, and the mask prepared by the melt-blown fabric provided by the invention can breathe more smoothly.
The invention also provides a method for preparing the multilayer melt-blown cloth with different fiber diameters, which can continuously produce melt-blown cloth with fibers of different diameters to form a high-efficiency low-resistance melt-blown material with good filtering effect and low air resistance; i.e. its air passage resistance is much lower than the corresponding value specified in the latest countries, with equal filtering effect.
Drawings
FIG. 1 is a schematic representation of the present invention for making a multilayer meltblown fabric;
FIG. 2 is a schematic view showing the structure of an apparatus used in the production process of the present invention;
in the figure:
101-a first melt blown spinning head; 220-set of web-forming rollers; 301-a first meltblown fabric layer;
102-a second melt-blown spinning head; 230-a negative pressure device; 302-a second meltblown fabric layer;
103-a third melt blown spinning head; 231-first negative pressure means; 303-a third meltblown layer;
104-a fourth melt blown spinning head; 232-second negative pressure means; 304-a fourth meltblown fabric layer.
210-a mesh curtain; 233-third negative pressure device;
211-a melt blown receiving surface; 234-a fourth negative pressure device;
Detailed Description
The invention provides a high-efficiency low-resistance melt-blown material which is characterized by comprising M layers of melt-blown cloth, wherein M is more than or equal to 2, the diameter of fibers forming the melt-blown cloth is gradually increased from the 1 st layer of melt-blown cloth to the M th layer of melt-blown cloth, and the porosity of the melt-blown cloth is gradually increased; wherein the fiber diameter of the 1 st layer is not less than 0.3 μ M, and the fiber diameter of the Mth layer is not more than 15 μ M; the high-efficiency low-resistance melt-blown material is prepared by a method comprising the following steps:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
The larger the fiber diameter, the better the rigidity; in a preferred embodiment, the fiber diameter of the Mth layer is no greater than 12 μ M, more preferably no greater than 10 μ M, in order to maintain a certain rigidity but not excessive stiffness. When the fiber diameter ratio of the M layer is larger, for example, larger than 10 μ M and smaller than 15 μ M, the high-efficiency low-resistance melt-blown material has certain ribs and bones, is not soft and collapses, and can be used in air filter devices, such as air filters, air conditioners and fresh air systems.
In another preferred embodiment, the fibers of layer 1 meltblown have a diameter of not less than 0.5 μm, so as to be easily prepared using conventional equipment.
In a preferred embodiment, M.gtoreq.3, the fiber diameter of the Mth layer of meltblown is not more than 12 μ M, and the fiber diameter of the 1 st layer of meltblown is not less than 0.5. mu.m.
In a preferred embodiment, the fiber diameter of the M-th layer of meltblown is in the range of 7-8 μ M and the fiber diameter of the 1 st layer of meltblown is in the range of 0.3-0.9. mu.m. When the fiber diameter of the melt-blown cloth is less than 10 mu m, the melt-blown cloth has better flexibility, so that the melt-blown cloth can be used for preparing medical masks, N95, KN95 and the like; of course such meltblown materials may also be used in other air filtration situations.
In order to obtain a better effect of reducing the air resistance, the number of layers of the meltblown fabric is preferably not less than 4, and in a preferred embodiment the number of layers of the meltblown fabric is 5 to 15, for example 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
In a preferred embodiment, the number of meltblown layers is 7 to 12.
In order to obtain a better effect of reducing the air resistance, the fiber diameters of the melt-blown fabrics of the respective layers differ by 0.1 to 1.2 μm, for example, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, 1.1 μm, 1.2 μm, in this order; preferably, the fiber diameters of the meltblown layers differ by 0.3 to 0.8 μm in order.
In a preferred embodiment, the number of meltblown layers is 8, and the diameters of the fibers of the meltblown from layer 1 to layer 8 are: 0.3-0.9 μm, 1-1.9 μm, 2-2.9 μm, 3-3.9 μm, 4-4.9 μm, 5-5.9 μm, 6-6.9 μm, 7-8 μm.
In a preferred embodiment, the thickness of the layers of the meltblown is the same or different.
In order to obtain a better reduction of the air resistance, in a preferred embodiment the thickness of the layers of the meltblown fabric is 80-120 μm.
In order to obtain a better effect of reducing the air resistance, in a preferred embodiment, the thickness of each layer of the meltblown fabric is the same, and the thickness of each layer of the meltblown fabric is 90-110 μm.
In order to obtain a better reduction in air resistance, in a preferred embodiment, the porosity of the meltblown fabric of layer 1 is 80-83% and the porosity of the meltblown fabric of layer M is 92-95%.
In order to obtain a better reduction of the air resistance, in a preferred embodiment the porosity of the meltblown layers differs by 2 to 5% in succession.
In order to obtain the fine fiber diameter range and the porosity with good fiber diameter difference, in a preferred embodiment, the diameter of the spinneret hole is 0.2-0.4mm, the temperature of the high-pressure air flow is 200-. Further preferably, the distance between the high-pressure airflow air outlet and the net forming curtain is 150-250 mm.
The invention also provides an air filtering device, which is characterized in that a filter core of the air filtering device is made of the high-efficiency low-resistance melt-blown material provided by the invention.
On the other hand, the invention also provides a mask which comprises a water-blocking outer layer, a melt-blown cloth intermediate layer and a moisture-absorbing inner layer, wherein the melt-blown cloth intermediate layer is made of the high-efficiency low-resistance melt-blown material provided by the invention.
The invention also provides a continuous preparation method of the multilayer melt-blown fabric with different melt-blown fiber diameters, which is characterized by comprising the following steps:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
In one embodiment, the parameters in step b are controlled such that the diameters of the fibers of the meltblown fabrics which are stacked one above the other are different.
In another embodiment, the parameters in step b are controlled such that the fiber diameters of the successively stacked meltblown fabrics are successively progressively increased, such that the porosity of the successively stacked meltblown fabrics is successively progressively increased.
In another embodiment, the multilayer meltblown fabric comprises M layers of meltblown fabrics, and the parameters in step b are controlled so that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein the fiber diameter of the 1 st layer is not less than 0.3 μ M, and the fiber diameter of the Mth layer is not more than 15 μ M.
In another embodiment, the multilayer meltblown fabric comprises M layers of meltblown fabrics, and the parameters in step b are controlled so that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein M is more than or equal to 3, the fiber diameter of the 1 st layer is not less than 0.5 μ M, and the fiber diameter of the M-th layer is not more than 12 μ M.
In another embodiment, the multilayer meltblown fabric comprises M layers of meltblown fabrics, and the parameters in step b are controlled so that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein the fiber diameter of the 1 st layer is in the range of 0.3-0.9 μ M, and the fiber diameter of the Mth layer is in the range of 7-8 μ M.
In another embodiment, the fiber diameters of the meltblown layers differ by 0.1 to 1.2 μm in order.
In another embodiment, the meltblown layers have successively different fiber diameters of 0.3 to 0.8 μm.
In another embodiment, the number of meltblown fabric layers is 8, and the diameters of the fibers of the meltblown fabric from layer 1 to layer 8 are: 0.3-0.9 μm, 1-1.9 μm, 2-2.9 μm, 3-3.9 μm, 4-4.9 μm, 5-5.9 μm, 6-6.9 μm, 7-8 μm.
In another embodiment, the thickness of each layer of the meltblown is the same or different.
In another embodiment, the thickness of each layer of the meltblown is between 80 and 120 μm.
In another embodiment, the meltblown of layer 1 has a porosity of 80% to 83% and the meltblown of layer M has a porosity of 92% to 95%.
In another embodiment, the porosity of each layer of meltblown differs by 2 to 5% in sequence.
In another embodiment, the diameter of the spinneret orifice is 0.2-0.4mm, the temperature of the high-pressure air flow is 200-. Further preferably, the distance between the high-pressure airflow air outlet and the net forming curtain is 150-250 mm.
In another embodiment, the web formation receiving device comprises a negative pressure device, a web formation roller set, a web curtain and a driving device, and the driving device is started; the driving roller is driven by the driving device to rotate to drive the screen curtain and the web forming roller set to move, so that the screen curtain can reciprocate and circulate along an annular assembly formed by the web forming roller set, and melt-blown cloth layers with different melt-blown fiber diameters are continuously superposed.
Examples
The invention is to produce multilayer meltblown webs with fibers of different diameters using the apparatus shown in fig. 2, which comprises a meltblown apparatus set and a web receiving apparatus comprising a negative pressure apparatus 230, a web roller set 220, a web 210 and a drive (not shown): the melt-blowing device group comprises a plurality of melt-blowing spinning heads, as shown in fig. 1 and fig. 2, the plurality of melt-blowing spinning heads comprise a first melt-blowing spinning head 101, a second melt-blowing spinning head 102, a third melt-blowing spinning head 103 and a fourth melt-blowing spinning head 104, and the plurality of melt-blowing spinning heads are arranged in parallel; the driving device is connected with the driving rollers in the web forming roller group 220 and is used for driving the driving rollers to rotate, so that the web curtain 210 is driven to circularly transmit through the lower parts of the melt-blown spinning heads, the web curtain forms a melt-blown receiving surface 211 when passing through the lower parts of a plurality of melt-blown spinning heads, the length of the melt-blown receiving surface 211 is not less than the distance between the first melt-blown spinning head 101 and the fourth melt-blown spinning head 104, and the width of the melt-blown receiving surface 211 is not less than the melt-blown width with the largest jet width in the plurality of melt-blown spinning heads; the negative pressure device 230 is disposed on a side of the melt-blown receiving surface 211 opposite to the melt-blown spinning head, and in order to ensure the forming stability of each melt-blown fiber layer, a negative pressure device is correspondingly disposed below the melt-blown receiving surface 211 corresponding to each melt-blown spinning head, as shown in fig. 1 and 2, a first negative pressure device 231, a second negative pressure device 232, a third negative pressure device 233 and a fourth negative pressure device 234 are respectively disposed corresponding to the first melt-blown spinning head 101, the second melt-blown spinning head 102, the third melt-blown spinning head 103 and the fourth melt-blown spinning head 104, so that each negative pressure device can perform a vacuum pumping operation during the production process, and melt-blown fibers ejected by each melt-blown spinning head can be melt-blown and attached to the receiving surface to form a melt-blown fabric layer. The device can also comprise a controller which is electrically connected with the melt-blowing device body, the driving device and/or the negative pressure device.
When the device is used for preparing melt-blown fabric, the melt-blown fabric production raw materials are added into a double-screw extruder to be melted and mixed, and then the melt-blown fabric is pressurized by a melt pump and then flows into a first melt-blown spinning machine head 101, a second melt-blown spinning machine head 102, a third melt-blown spinning machine head 103 and a fourth melt-blown spinning machine head 104 respectively; parameters such as the size of a spinneret orifice opening of the melt-blown spinning head, the temperature and the speed of high-pressure airflow, the wind speed and the negative pressure value of the negative pressure device 230 and the like are respectively set under the control of the controller, so that each melt-blown spinning head can jet out fibers with preset diameters to form a melt-blown fabric layer with a set specific surface area and fiber gaps; meanwhile, a driving device is started, the driving roller is driven by the driving device to rotate to drive the web curtain 210 and the web roller group 220 to move in a reciprocating and circulating mode, the web curtain 210 can move in a reciprocating and circulating mode along an annular assembly formed by the web roller group 220, the web curtain 210 forms a melt-blown receiving surface 211 when passing through the lower portion of a melt-blown spinning head, the melt-blown receiving surface 211 receives fibers sprayed by the melt-blown spinning head along the transmission direction of the melt-blown receiving surface to form a melt-blown fabric layer, the melt-blown fabric layer sequentially passes through a first melt-blown spinning head 101 to form a first melt-blown fabric layer 301, a second melt-blown fabric layer 302 is formed on the first melt-blown fabric layer 301 when passing through a second melt-blown spinning head 102, a third melt-blown fabric layer 303 is formed above the second melt-blown fabric layer 302 when passing through a third melt-blown spinning head 103, a fourth melt-blown fabric layer 304 and the like are formed on the third melt-blown fabric layer 303 when passing through a fourth melt-blown spinning head 104, and finally, the first melt-blown fabric layer 301, the second melt-blown fabric layer 302, the third fabric layer 302, the second fabric layer 302, and the third fabric layer 302, and the like, The multilayer meltblown fabric formed by overlapping the third meltblown fabric layer 303 and the fourth meltblown fabric layer 304 is integrally treated in a subsequent process and collected into a roll to obtain the multilayer meltblown fabric.
Example 1
a. Uniformly mixing 4% of electret master batch and 96% of polypropylene according to the weight percentage to obtain a melt-blown fabric raw material; adding the melt-blown fabric raw material into a screw extruder for melt processing;
b. adjusting the temperature values of 5 zones of the screw extruder A to be respectively set as the temperature of a first zone of 190 ℃, the temperature of a second zone of 220 ℃, the temperature of a third zone of 240 ℃, the temperature of a fourth zone of 240 ℃ and the temperature of a fifth zone of 210 ℃, preserving the heat for 20min, and sequentially sending the melt obtained by melting to spinneret heads A-J by adopting a metering pump; sequentially opening a host, a fan and a receiving net curtain, wherein the rotating speed of the host is 300r/min, hot air of the fans of spinneret heads A-J is blown, and the hot air temperature of the fans, the rotating speed of the fans and the blowing distance are set as shown in table 1; so that the fiber diameters of the respective layers are as shown in table 2.
c. And simultaneously, a driving device is started, the driving roller is driven by the driving device to rotate to drive the action of the net curtain and the net forming roller group, so that the net curtain can move in a reciprocating and circulating mode along an annular assembly formed by the net forming roller group, the net curtain forms a melt-blown receiving surface when passing through the lower part of a melt-blown spinning machine head, the melt-blown receiving surface receives fibers sprayed by the melt-blown spinning machine head along the transmission direction of the melt-blown receiving surface to form a melt-blown cloth layer, the melt-blown cloth layer sequentially passes through a first melt-blown spinning machine head A to form a first melt-blown cloth layer, a second melt-blown cloth layer is formed on the first melt-blown cloth layer when passing through a second melt-blown spinning machine head B, and a third melt-blown cloth layer is formed above the second melt-blown cloth layer when passing through a third melt-blown spinning machine head C until a tenth melt-blown cloth layer is formed. The thickness of each layer is shown in table 3.
d. And performing water electret treatment at an electret voltage of 250V.
e. Rolling and molding by a winding roller to obtain a melt-blown fabric finished product;
f. performing performance test on the prepared melt-blown fabric finished product, testing the filtration efficiency, the expiration resistance and the inspiration resistance by adopting GB2626-2019, detecting the porosity by adopting Autosorb-iQ3, and detecting the gram weight; the test results are shown in table 4.
Example 2
a. Uniformly mixing 4% of electret master batch and 96% of polypropylene according to the weight percentage to obtain a melt-blown fabric raw material; adding the melt-blown fabric raw material into a screw extruder for melt processing;
b. adjusting the temperature values of 5 zones of the screw extruder A to be respectively set to be 190 ℃ in the first zone, 220 ℃ in the second zone, 240 ℃ in the third zone, 240 ℃ in the fourth zone and 210 ℃ in the fifth zone, preserving the temperature for 20min, and sequentially sending the melt obtained by melting to a spinneret head A-H by adopting a metering pump; sequentially opening a host, a fan and a receiving net curtain, wherein the rotating speed of the host is 300r/min, hot air of the fans of spinneret heads A-H is blown, and the hot air temperature of the fans, the rotating speed of the fans and the blowing distance are set as shown in table 1; so that the fiber diameters of the respective layers are as shown in table 2.
c. And simultaneously, a driving device is started, the driving roller is driven by the driving device to rotate to drive the action of the net curtain and the net forming roller group, so that the net curtain can move in a reciprocating and circulating mode along an annular assembly formed by the net forming roller group, the net curtain forms a melt-blown receiving surface when passing through the lower part of a melt-blown spinning machine head, the melt-blown receiving surface receives fibers sprayed by the melt-blown spinning machine head along the transmission direction of the melt-blown receiving surface to form a melt-blown cloth layer, the melt-blown cloth layer sequentially passes through a first melt-blown spinning machine head A to form a first melt-blown cloth layer, a second melt-blown cloth layer is formed on the first melt-blown cloth layer when passing through a second melt-blown spinning machine head B. The thickness of each layer is shown in table 3.
d. And performing water electret treatment at an electret voltage of 250V.
e. Rolling and molding by a winding roller to obtain a melt-blown fabric finished product;
f. performing performance test on the prepared melt-blown fabric finished product, testing the filtration efficiency, the expiration resistance and the inspiration resistance by adopting GB2626-2019, detecting the porosity by adopting Autosorb-iQ3, and detecting the gram weight; the test results are shown in table 4.
Example 3
a. Uniformly mixing 4% of electret master batch and 96% of polypropylene according to the weight percentage to obtain a melt-blown fabric raw material; adding the melt-blown fabric raw material into a screw extruder for melt processing;
b. adjusting the temperature values of 5 zones of the screw extruder A to be respectively set to be 190 ℃ in the first zone, 220 ℃ in the second zone, 240 ℃ in the third zone, 240 ℃ in the fourth zone and 210 ℃ in the fifth zone, preserving the temperature for 20min, and sequentially sending the melt obtained by melting to spinning nozzles A-F by adopting a metering pump; sequentially opening a host, a fan and a receiving net curtain, wherein the rotating speed of the host is 300r/min, hot air of the fans of spinneret heads A-F is blown, and the hot air temperature of the fans, the rotating speed of the fans and the blowing distance are set as shown in table 1; so that the fiber diameters of the respective layers are as shown in table 2.
c. And simultaneously, a driving device is started, the driving roller is driven by the driving device to rotate to drive the action of the net curtain and the net forming roller group, so that the net curtain can move in a reciprocating and circulating mode along an annular assembly formed by the net forming roller group, the net curtain forms a melt-blown receiving surface when passing through the lower part of a melt-blown spinning machine head, the melt-blown receiving surface receives fibers sprayed by the melt-blown spinning machine head along the transmission direction of the melt-blown receiving surface to form a melt-blown cloth layer, the melt-blown cloth layer sequentially passes through a first melt-blown spinning machine head A to form a first melt-blown cloth layer, a second melt-blown cloth layer is formed on the first melt-blown cloth layer when passing through a second melt-blown spinning machine head B, and a third melt-blown cloth layer is formed above the second melt-blown cloth layer when passing through a third melt-blown spinning machine head C until a sixth melt-blown cloth layer is formed. The thickness of each layer is shown in table 3.
d. And performing water electret treatment at an electret voltage of 250V.
e. Rolling and molding by a winding roller to obtain a melt-blown fabric finished product;
f. performing performance test on the prepared melt-blown fabric finished product, testing the filtration efficiency, the expiration resistance and the inspiration resistance by adopting GB2626-2019, detecting the porosity by adopting Autosorb-iQ3, and detecting the gram weight; the test results are shown in table 4.
Example 4
a. Uniformly mixing 4% of electret master batch and 96% of polypropylene according to the weight percentage to obtain a melt-blown fabric raw material; adding the melt-blown fabric raw material into a screw extruder for melt processing;
b. adjusting the temperature values of 5 zones of the screw extruder A to be respectively set to be 190 ℃ in the first zone, 220 ℃ in the second zone, 240 ℃ in the third zone, 240 ℃ in the fourth zone and 210 ℃ in the fifth zone, preserving the temperature for 20min, and sequentially sending the melt obtained by melting to spinning nozzles A-D by adopting a metering pump; sequentially opening a host, a fan and a receiving net curtain, wherein the rotating speed of the host is 300r/min, hot air of the fans of the spinneret heads A-D is blown, and the hot air temperature of the fans, the rotating speed of the fans and the blowing distance are set as shown in table 1; so that the fiber diameters of the respective layers are as shown in table 2.
c. And simultaneously, a driving device is started, the driving roller is driven by the driving device to rotate to drive the action of the net curtain and the net forming roller group, so that the net curtain can move in a reciprocating and circulating mode along an annular assembly formed by the net forming roller group, the net curtain forms a melt-blown receiving surface when passing through the lower part of a melt-blown spinning machine head, the melt-blown receiving surface receives fibers sprayed by the melt-blown spinning machine head along the transmission direction of the melt-blown receiving surface to form a melt-blown cloth layer, the melt-blown cloth layer sequentially passes through a first melt-blown spinning machine head A to form a first melt-blown cloth layer, a second melt-blown cloth layer is formed on the first melt-blown cloth layer when passing through a second melt-blown spinning machine head B, and a third melt-blown cloth layer is formed above the second melt-blown cloth layer when passing through a third melt-blown spinning machine head C until a fourth melt-blown cloth layer is formed. The thickness of each layer is shown in table 3.
d. And performing water electret treatment at an electret voltage of 250V.
e. Rolling and molding by a winding roller to obtain a melt-blown fabric finished product;
f. performing performance test on the prepared melt-blown fabric finished product, testing the filtration efficiency, the expiration resistance and the inspiration resistance by adopting GB2626-2019, detecting the porosity by adopting Autosorb-iQ3, and detecting the gram weight; the test results are shown in table 4.
TABLE 1
Figure BDA0003055562450000101
Figure BDA0003055562450000111
Figure BDA0003055562450000121
TABLE 2
Figure BDA0003055562450000131
TABLE 3
Figure BDA0003055562450000132
TABLE 4
Examples Gram weight g/m2 Porosity (%) Filtration efficiency/%) Suction resistance/Pa Expiratory resistance/Pa
1 45 89.2 98.98 59.07 55.41
2 40 88.7 98.97 55.09 53.98
3 30 87.9 98.67 54.70 53.89
4 25 87.6 98.23 53.96 52.31
And (4) conclusion: the melt-blown fabric provided by the invention has the filtering effect higher than 98%, and the inspiration resistance and the expiration resistance lower than 60 Pa; the respiratory resistance is far lower than the inhalation resistance of KN95 disposable mask specified in the latest national standard GB2626-2019 and is less than or equal to 210Pa, and the exhalation resistance is less than or equal to 210 Pa.

Claims (33)

1. The high-efficiency low-resistance melt-blown material is characterized by comprising M layers of melt-blown cloth, wherein M is more than or equal to 2, the diameter of fibers forming the melt-blown cloth is gradually increased from the 1 st layer of melt-blown cloth to the M th layer of melt-blown cloth, and the porosity of the melt-blown cloth is gradually increased; wherein the fiber diameter of the 1 st layer is not less than 0.3 μ M, and the fiber diameter of the Mth layer is not more than 15 μ M; the high-efficiency low-resistance melt-blown material is prepared by a method comprising the following steps:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
2. The high-efficiency low-resistance melt-blown material according to claim 1, wherein M is more than or equal to 3, the fiber diameter of the 1 st layer is not less than 0.5 μ M, and the fiber diameter of the Mth layer is not more than 12 μ M.
3. The high efficiency low resistivity melt blown material of claim 1 wherein the fiber diameter of layer 1 is in the range of 0.3 to 0.9 μ M and the fiber diameter of layer M is in the range of 7 to 8 μ M.
4. The high-efficiency low-resistance melt-blown material according to claim 3, wherein the number of layers of the melt-blown fabric is 5-15.
5. The high-efficiency low-resistance melt-blown material according to claim 3, wherein the number of layers of the melt-blown fabric is 7-12.
6. The high efficiency and low resistivity melt blown material of claim 3 wherein the fiber diameters of the melt blown cloth layers differ by 0.1 to 1.2 μm in sequence.
7. The high efficiency and low resistivity melt blown material of claim 3 wherein the fiber diameters of the melt blown fabric layers differ in sequence by 0.3 to 0.8 μm.
8. The high-efficiency low-resistance melt-blown material according to claim 3, wherein the number of the melt-blown fabric layers is 8, and the fiber diameters of the melt-blown fabrics from the 1 st layer melt-blown fabric to the 8 th layer melt-blown fabric are respectively as follows: 0.3-0.9 μm, 1-1.9 μm, 2-2.9 μm, 3-3.9 μm, 4-4.9 μm, 5-5.9 μm, 6-6.9 μm, 7-8 μm.
9. The high efficiency low resistivity meltblown material according to claim 3 wherein the layers of the meltblown fabric are of the same or different thicknesses.
10. The high efficiency and low resistivity meltblown material according to claim 3 wherein each layer of the meltblown fabric has a thickness of 80-120 μm.
11. The high efficiency and low resistivity melt blown material of claim 3 wherein the thickness of each layer of the melt blown fabric is the same and the thickness of each layer of the melt blown fabric is 90 to 110 μm.
12. The high efficiency and low resistivity meltblown material of claim 3 wherein the meltblown fabric of layer 1 has a porosity of 80-83% and the meltblown fabric of layer M has a porosity of 92-95%.
13. The high efficiency and low resistivity melt blown material of claim 12 wherein the melt blown fabric layers have porosities which differ by 2 to 5% in sequence.
14. The high-efficiency low-resistance melt-blown material according to claim 3, wherein the diameter of the spinneret hole is 0.2-0.4mm, the temperature of the high-pressure air flow is 200-.
15. The high-efficiency low-resistance melt-blown material as claimed in claim 14, wherein the distance between the high-pressure airflow outlet and the web-forming curtain is 150-250 mm.
16. An air filter device, wherein a filter core of the air filter device is made of the high-efficiency low-resistance melt-blown material according to any one of claims 1 to 15.
17. A mask comprising a water-blocking outer layer, a meltblown intermediate layer and a moisture-absorbing inner layer, wherein said meltblown intermediate layer is formed from the high efficiency, low resistance meltblown material of any of claims 3-15.
18. A process for continuously producing multiple meltblown webs having different meltblown fiber diameters, the process comprising the steps of:
a. the melt pressurized by a melt pump sequentially flows into a melt-blowing device group, the melt-blowing device group comprises a plurality of melt-blowing spinning machine heads arranged in parallel, and the melt-blowing holes of at least two melt-blowing spinning machine heads in the melt-blowing device group are different in diameter;
b. according to the requirement of the fiber diameter of the melt-blown cloth layer, one or more parameters of the temperature of the high-pressure air flow, the speed of the high-pressure air flow and the bottom wind speed of the web forming device are adjusted;
c. sequentially carrying out melt spinning in different melt-blown spinning heads to superpose melt-blown cloth layers with different melt-blown fiber diameters;
d. the stacked meltblown webs were collected.
19. The continuous production method according to claim 18, wherein the parameters in the step b are controlled so that the diameters of the fibers of the meltblown fabrics which are successively stacked are different.
20. The continuous production method according to claim 18, wherein the parameters in the step b are controlled such that the fiber diameters of the successively stacked meltblown fabrics are successively gradually increased and the porosity of the successively stacked meltblown fabrics is successively gradually increased.
21. The continuous production method according to claim 18, wherein the plurality of meltblown fabrics comprise M layers of meltblown fabrics, and the parameters in step b are controlled such that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein the fiber diameter of the 1 st layer is not less than 0.3 μ M, and the fiber diameter of the Mth layer is not more than 15 μ M.
22. The continuous production method according to claim 18, wherein the plurality of meltblown fabrics comprise M layers of meltblown fabrics, and the parameters in step b are controlled such that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein M is more than or equal to 3, the fiber diameter of the 1 st layer is not less than 0.5 μ M, and the fiber diameter of the M-th layer is not more than 12 μ M.
23. The continuous production method according to claim 18, wherein the plurality of meltblown fabrics comprise M layers of meltblown fabrics, and the parameters in step b are controlled such that the diameter of the fibers forming the meltblown fabric gradually increases and the porosity of the meltblown fabric gradually increases from the first layer of meltblown fabric to the M layer of meltblown fabric; wherein the fiber diameter of the 1 st layer is in the range of 0.3-0.9 μ M, and the fiber diameter of the Mth layer is in the range of 7-8 μ M.
24. The continuous production method according to claim 23, wherein the fiber diameters of the respective meltblown fabrics differ by 0.1 to 1.2 μm in order.
25. The continuous production method according to claim 24, wherein the difference in fiber diameters of the respective meltblown fabrics is 0.3 to 0.8 μm in order.
26. The continuous production method according to claim 23, wherein the number of the meltblown fabric layers is 8, and the diameters of the fibers of the meltblown fabrics from the 1 st to the 8 th meltblown fabric layers are respectively: 0.3-0.9 μm, 1-1.9 μm, 2-2.9 μm, 3-3.9 μm, 4-4.9 μm, 5-5.9 μm, 6-6.9 μm, 7-8 μm.
27. The continuous production method according to claim 18, wherein the thickness of each layer of the meltblown fabric is the same or different.
28. The continuous production method according to claim 18, wherein each layer of the meltblown fabric has a thickness of 80 to 120 μm.
29. The continuous process of claim 18 wherein the meltblown fabric of layer 1 has a porosity of 80 to 83% and the meltblown fabric of layer M has a porosity of 92 to 95%.
30. The continuous production method of claim 18, wherein the porosities of the respective meltblown fabrics differ by 2 to 5% in order.
31. The continuous preparation method of claim 23, wherein the diameter of the spinneret hole is 0.2-0.4mm, the temperature of the high-pressure air flow is 200-.
32. The continuous preparation method of claim 31, wherein the distance between the high-pressure airflow outlet and the net forming curtain is 150-250 mm.
33. The continuous production method according to claim 18, wherein the web formation receiving device includes a negative pressure device, a web formation roller set, a web curtain, and a driving device, the driving device is activated; the driving roller is driven by the driving device to rotate to drive the screen curtain and the web forming roller set to move, so that the screen curtain can reciprocate and circulate along an annular assembly formed by the web forming roller set, and melt-blown cloth layers with different melt-blown fiber diameters are continuously superposed.
CN202110514533.1A 2021-05-08 2021-05-08 Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same Pending CN113306240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110514533.1A CN113306240A (en) 2021-05-08 2021-05-08 Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110514533.1A CN113306240A (en) 2021-05-08 2021-05-08 Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same

Publications (1)

Publication Number Publication Date
CN113306240A true CN113306240A (en) 2021-08-27

Family

ID=77373030

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110514533.1A Pending CN113306240A (en) 2021-05-08 2021-05-08 Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same

Country Status (1)

Country Link
CN (1) CN113306240A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113684610A (en) * 2021-09-30 2021-11-23 金亿纶(东港)新型材料科技有限公司 Net forming device for producing multilayer-structure melt-blown fabric by single die and using method thereof
CN115262087A (en) * 2022-08-25 2022-11-01 深圳科博源科技有限公司 Melt-blown board capable of replacing glass fiber board, processing method and application

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202450247U (en) * 2011-12-14 2012-09-26 山东俊富非织造材料有限公司 Production line for collagen compound non-woven fabric
CN206264508U (en) * 2016-12-09 2017-06-20 厦门超宇环保科技股份有限公司 A kind of multiple-effect composite needled filter felt of material porosity gradient change
CN110430932A (en) * 2017-03-22 2019-11-08 霍林斯沃思和沃斯有限公司 Filter medium including the waved filter layer with gradient
CN210583857U (en) * 2019-07-15 2020-05-22 苏州工业园区拓朴环保净化有限公司 Multilayer melt-blown filter element with coarse fiber support
CN111876905A (en) * 2020-08-25 2020-11-03 江苏金美达新材料有限公司 Multilayer melt-blown non-woven fabric and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202450247U (en) * 2011-12-14 2012-09-26 山东俊富非织造材料有限公司 Production line for collagen compound non-woven fabric
CN206264508U (en) * 2016-12-09 2017-06-20 厦门超宇环保科技股份有限公司 A kind of multiple-effect composite needled filter felt of material porosity gradient change
CN110430932A (en) * 2017-03-22 2019-11-08 霍林斯沃思和沃斯有限公司 Filter medium including the waved filter layer with gradient
CN210583857U (en) * 2019-07-15 2020-05-22 苏州工业园区拓朴环保净化有限公司 Multilayer melt-blown filter element with coarse fiber support
CN111876905A (en) * 2020-08-25 2020-11-03 江苏金美达新材料有限公司 Multilayer melt-blown non-woven fabric and preparation method thereof

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
丁启圣: "《新型实用过滤技术 第4版》", 31 December 2017, 北京：冶金工业出版社 *
王延熹: "《非织造布生产技术》", 30 June 1998, 上海：中国纺织大学出版社 *
胡必杰: "《SIFIC医院感染防控用品使用指引 2014-2015年》", 30 May 2014, 上海：上海科学技术出版社 *
覃小红: "《纳米技术与纳米纺织品》", 30 December 2011, 上海：东华大学出版社 *
黄惠宁: "《陶瓷墙地砖数字喷墨印刷技术与设备应用》", 31 May 2018, 北京：中国建材工业出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113684610A (en) * 2021-09-30 2021-11-23 金亿纶(东港)新型材料科技有限公司 Net forming device for producing multilayer-structure melt-blown fabric by single die and using method thereof
CN115262087A (en) * 2022-08-25 2022-11-01 深圳科博源科技有限公司 Melt-blown board capable of replacing glass fiber board, processing method and application

Similar Documents

Publication Publication Date Title
CN113306240A (en) Multilayer melt-blown fabric, method for producing the same, and air filtration device and mask comprising the same
KR102069880B1 (en) Mask machined nano fiber filter
DE69725233T2 (en) Nonwovens with different aesthetic properties and manufacturing processes
TWI821187B (en) Mask
DE112010001912B4 (en) Multilayer nanofiber filter and method of manufacture
US5645057A (en) Meltblown barrier webs and processes of making same
EP1790406B1 (en) Filter element and method of making
CN104043286A (en) Nanofiber filter facemasks and cabin filters
CN108179549A (en) A kind of elastic super soft non-woven material of polypropylene-base long filament and its production method
JP7077575B2 (en) Mixed non-woven fabrics, laminates, filter media for filters, and methods for manufacturing these
WO2004038078A2 (en) Nonwoven material with elastic properties, related production method and device therefor
CN111165956A (en) Washable mask capable of effectively blocking viruses and bacteria and preparation method thereof
US20210322907A1 (en) Multilayer filter with antimicrobial properties and use thereof in industrial filtration applications and protective masks
KR102001003B1 (en) Membrane of Natural Ventilation Type and System Window Using the Same
CN215013810U (en) Melt-blown material, mask containing melt-blown material and air filtering device
EP4103300A1 (en) Novel filter material, face mask comprising the same and method of making the same
CN215209903U (en) Device for producing multilayer melt-blown fabric
JP6099330B2 (en) filter
CN112323261A (en) Composite mesh belt device for improving uniformity of melt-blown fabric
CN113308797B (en) Melt-blown fabric, method for producing same, mask and air filter device comprising same
KR102382941B1 (en) Filter media for air filtration and dust mask using it
CN113786018A (en) Polylactic acid composite degradable mask
CN214244685U (en) Electrostatic spinning equipment
DE2948821C2 (en)
KR102621800B1 (en) Nanofiber filter and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: Lin Fangbing

Inventor after: Liu Ying

Inventor before: Lin Fangbing

CB03 Change of inventor or designer information