CN111636146A - Preparation method of non-woven fabric - Google Patents
Preparation method of non-woven fabric Download PDFInfo
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- CN111636146A CN111636146A CN202010422472.1A CN202010422472A CN111636146A CN 111636146 A CN111636146 A CN 111636146A CN 202010422472 A CN202010422472 A CN 202010422472A CN 111636146 A CN111636146 A CN 111636146A
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- 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
- D04H1/4374—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 using different kinds of webs, e.g. by layering webs
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/08—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyacrylonitrile as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- 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
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/022—Moisture-responsive characteristics hydrophylic
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a preparation method of non-woven fabric, which comprises the following preparation steps: s1 preparing raw materials; s2 filtering; s3 spinning into a net; s4 carrying out solution jet spinning; s5 reinforcement and finishing; s6, drying; therefore, the non-woven fabric has fluffy feeling and thick feeling, the strength and the filtering capacity of the non-woven fabric are increased, the pressure drop is low, the melt-blown fabric can be replaced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of non-woven fabric production, in particular to a preparation method of a non-woven fabric.
Background
The non-woven fabric is non-woven fabric formed by directly using high polymer chips, short fibers or filaments to form a net by air flow or machinery, then carrying out solution jet spinning, needling or hot emulsion reinforcement and finally carrying out after-treatment. Spun-bonded nonwoven fabric: after a polymer is extruded and stretched to form continuous filaments, the filaments are laid into a web, and the web is subjected to self-bonding, thermal bonding, chemical bonding or mechanical reinforcement to change the web into a non-woven fabric; the existing spun-bonded non-woven fabric has low strength, poor filtering capability and high pressure drop, so that the existing spun-bonded non-woven fabric cannot replace melt-blown cloth to be applied to the fields of air, liquid filtering materials, isolating materials, absorbing materials, mask materials, heat-insulating materials, wiping cloth and the like.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a preparation method of a non-woven fabric, which not only can enable the non-woven fabric to have fluffy and thick feelings, but also can increase the strength and the filtering capacity of the non-woven fabric, has low pressure drop, can replace melt-blown fabrics, and reduces the production cost.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of non-woven fabric comprises the following preparation steps:
preparing S1 raw material: mixing the raw materials a, extruding and melting the mixture by a screw extruder to obtain a melt a, dissolving the raw materials b in a solvent, adding the dissolved raw materials b into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b;
s2 filtering: filtering the prepared melt a and the spinning solution b obtained in the step S1 through filters respectively to remove impurities, and then feeding the melt a and the spinning solution b into a spinning assembly respectively;
s3 spinning into net: quantitatively feeding the melt a and the spinning solution b filtered in the step S2 into a spinning assembly by using metering pumps respectively, spraying the melt a and the spinning solution b by using a spinneret plate of a spinning machine, cooling and solidifying the melt a and the spinning solution b into filaments, guiding the filaments into a drawing nozzle, drawing the filaments by using air flow, and lapping on a lapping machine to obtain a fiber web A;
s4 solution jet spinning: feeding the fiber web A obtained in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by using a metering pump, after the spinning solution B is jetted out by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle, drawing the tows by using air flow, cooling and solidifying the tows on the fiber web A into filaments, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric;
s6 drying: and (4) inputting the non-woven fabric subjected to the solution jet spinning in the step S5 into an oven for drying.
The preparation method of the non-woven fabric provided by the invention not only can enable the non-woven fabric to have fluffy and thick feelings, but also can increase the strength and the filtering capacity of the non-woven fabric, has lower pressure drop, can replace melt-blown fabric, and reduces the production cost.
On the basis of the technical scheme, the invention can be further improved as follows:
preferably, the components of the raw material a and the raw material b are different or the components of the raw material a and the raw material b are the same.
Preferably, when the components of the raw material a and the raw material b are different, the raw material a consists of the following raw materials in parts by weight: 81-86.5 parts of polypropylene, 12.5-16 parts of propenyl elastomer, 0.5-1.5 parts of soft master batch and 0.5-1.5 parts of titanium dioxide; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.
Preferably, when the components of the raw material a and the raw material b are the same, the raw material a consists of the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.
Preferably, the solution jet spinneret is controlled to have a solution jet draft pressure of 2bar to 70bar in the steps S3 and S4, respectively.
Preferably, the nonwoven fabric obtained by the solution jet spinning in the step S5 is subjected to a hydrophilic treatment.
Preferably, the hydrophilic agent and the purified water are mixed and stirred at a weight ratio of 1 to 150 to obtain the hydrophilic treatment liquid used in the hydrophilic treatment step.
Preferably, the drying in step S6 is performed by pre-drying the nonwoven fabric in a first oven, and the pre-dried nonwoven fabric is dried in a second oven.
Preferably, the pre-drying is carried out in a single oven at a temperature of
The temperature for drying in the second drying oven is
Preferably, the filter filtration in the step S2 adopts a two-stage filtration mode of pre-filtration and fine filtration, wherein the particle size of the pre-filtration is less than 80um, and the particle size of the fine filtration is less than 30 um.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise specified, the reagents used in the following examples are commercially available from normal sources.
In order to achieve the purpose of the invention, the preparation method of the non-woven fabric provided by the invention comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 81 parts of polypropylene, 12.5 parts of propenyl elastomer, 0.5 part of soft master batch and 0.5 part of titanium dioxide; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; (ii) a The raw material b comprises the following raw materials in parts by weight: 10 parts of polylactic acid and 20 parts of polyacrylonitrile;
s2 melt filtration: filtering the melt a and the spinning solution b obtained in the step S1 through a filter respectively to remove impurities on line, and then entering a spinning assembly, wherein the impurities removed by the filter on line are filtered in a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a by a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles by air flow, and paving the filaments on a web former to obtain fiber webs A respectively, wherein the pressure of solution spraying and drawing air is 50 bar;
s4 solution jet spinning: feeding the fiber web A in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the pressure of solution jet drawing air of 50bar, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: and (3) overlapping the fiber web B obtained in the step S4, putting the fiber web B into a solution jet spinning area for reinforcement to obtain a non-woven fabric, performing hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1 to 150 into a liquid state, and heating to 53 ℃.
S6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 105 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 110 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and glues earlier the lapping and then solution jet spinning carries out the production of non-woven fabrics 1, can make non-woven fabrics 1 have fluffy sense, thick sense, increases non-woven fabrics 1's brute force, filter capacity, can replace melt-blown fabric reduction in production cost, carries out hydrophilic treatment to the top layer of non-woven fabrics 1 in this embodiment, can effectual improvement non-woven fabrics 1's hydrophilicity.
The invention provides a preparation method of non-woven fabric, which comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 86.5 parts of polypropylene, 16 parts of propenyl elastomer, 1.5 parts of soft master batch and 1.5 parts of titanium dioxide; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; (ii) a The raw material b comprises the following raw materials in parts by weight: 70 parts of polylactic acid and 80 parts of polyacrylonitrile;
s2 melt filtration: respectively removing impurities from the melt a and the spinning solution b obtained in the step S1 through a filter on line, and then entering a spinning assembly, wherein the impurities removed by the filter on line adopt a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a through a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles through air flow, and paving the filaments on a web former to obtain fiber webs A respectively, wherein the pressure of solution spraying and drawing air is 70 bar;
s4 solution jet spinning: feeding the fiber web A in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the condition that the pressure of solution jet drawing air is 70bar, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric, carrying out hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1: 150 into a liquid state, and heating to 53 ℃;
s6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid-carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 125 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 130 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and spins earlier the production that the lapping was carried out non-woven fabrics 2 to the spunbond and then solution jet spinning, can make non-woven fabrics 2 have fluffy sense, thick sense, increases 2 powerful, the filter capacity of non-woven fabrics, can replace melt-blown fabric reduction in production cost, and hydrophilic treatment is done to the top layer of non-woven fabrics 2 in this embodiment, can the effectual hydrophilicity that improves non-woven fabrics 2.
The invention provides a preparation method of non-woven fabric, which comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 83.75 parts of polypropylene, 14.25 parts of propenyl elastomer, 1.0 part of soft master batch and 1.0 part of titanium dioxide; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; (ii) a The raw material b comprises the following raw materials in parts by weight: 40 parts of polylactic acid and 50 parts of polyacrylonitrile;
s2 melt filtration: respectively filtering the melt a and the spinning solution b obtained in the step S1 on line through a filter to remove impurities, and then entering a spinning assembly, wherein the online filtering and impurity removal of the filter adopts a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a by a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles by air flow, and paving the filaments on a web former to obtain fiber webs A respectively, wherein the pressure of solution spraying and drawing air is 2 bar;
s4 solution jet spinning: feeding the fiber web A obtained in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by using a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the pressure of solution jet drawing air of 2bar, and laying a web on a web forming machine to obtain a fiber web B;
s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric, carrying out hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1: 150 into a liquid state, and heating to 53 ℃;
s6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 112 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 142 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and spins earlier the production that the lapping was sprayed to solution jet spinning carried out non-woven fabrics 3, can make non-woven fabrics 3 have fluffy sense, thick sense, increases brute force, the filter capacity of non-woven fabrics, can replace melt-blown fabric reduction in production cost, does hydrophilic treatment to the top layer of non-woven fabrics, hydrophilicity that can effectual improvement non-woven fabrics.
The invention provides a preparation method of non-woven fabric, which comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 10 parts of polylactic acid and 20 parts of polyacrylonitrile; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; (ii) a The raw material b comprises the following raw materials in parts by weight: 10 parts of polylactic acid and 20 parts of polyacrylonitrile;
s2 melt filtration: respectively filtering the melt a and the spinning solution b obtained in the step S1 on line through a filter to remove impurities, and then entering a spinning assembly, wherein the online filtering and impurity removal of the filter adopts a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a through a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles through air flow, and lapping on a lapping machine to respectively obtain fiber nets A;
s4 solution jet spinning: feeding the fiber web A in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the pressure of solution jet drawing air of 50bar, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric, carrying out hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1: 150 into a liquid state, and heating to 53 ℃;
s6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 105 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 110 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and glues earlier the lapping and then solution jet spinning carries out the production of non-woven fabrics 4, can make non-woven fabrics 4 have fluffy sense, thick sense, increases non-woven fabrics 4's brute force, filter capacity, can replace melt-blown fabric reduction in production cost, and hydrophilic treatment is done to non-woven fabrics 4's top layer in this embodiment, can the effectual hydrophilicity that improves the non-woven fabrics.
The invention provides a preparation method of non-woven fabric, which comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 70 parts of polylactic acid and 80 parts of polyacrylonitrile; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; (ii) a The raw material b comprises the following raw materials in parts by weight: 70 parts of polylactic acid and 80 parts of polyacrylonitrile;
s2 melt filtration: respectively filtering the melt a and the spinning solution b obtained in the step S1 on line through a filter to remove impurities, and then entering a spinning assembly, wherein the online filtering and impurity removal of the filter adopts a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a through a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles through air flow, and lapping on a lapping machine to respectively obtain fiber nets A;
s4 solution jet spinning: feeding the fiber web A in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the pressure of solution jet drawing air of 50bar, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: and (3) overlapping the fiber web B obtained in the step S4, putting the fiber web B into a solution jet spinning area for reinforcement to obtain a non-woven fabric, performing hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1 to 150 into a liquid state, and heating to 53 ℃.
S6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 105 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 110 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and glues earlier the lapping and then solution jet spinning carries out the production of non-woven fabrics 5, can make non-woven fabrics 5 have fluffy sense, thick sense, increases brute force, the filter capacity of non-woven fabrics, can replace melt-blown fabric reduction in production cost, and hydrophilic treatment is done to the top layer of non-woven fabrics 5 in this embodiment, can the effectual hydrophilicity that improves the non-woven fabrics.
The invention provides a preparation method of non-woven fabric, which comprises the following steps:
preparing S1 raw material: the raw materials a are mixed and then fed into a hopper, the mixed raw materials a are extruded and melted by a double-screw extruder to obtain a melt a, and the raw materials a comprise the following raw materials in parts by weight: 40 parts of polylactic acid and 50 parts of polyacrylonitrile; dissolving the raw material b in a solvent, adding the solution into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b; the raw material b comprises the following raw materials in parts by weight: 40 parts of polylactic acid and 50 parts of polyacrylonitrile;
s2 melt filtration: respectively filtering the melt a and the spinning solution b obtained in the step S1 on line through a filter to remove impurities, and then entering a spinning assembly, wherein the online filtering and impurity removal of the filter adopts a two-stage filtering mode of pre-filtering and fine filtering, the precision of the pre-filtering is less than 80um, and the precision of the fine filtering is less than 30 um;
s3 spinning into net: quantitatively feeding the melt a filtered in the step S2 into a spinning assembly by a metering pump, spraying the melt a through a spinneret plate of a spinning machine, cooling and solidifying the melt into filaments, guiding the filament bundles into a drawing nozzle, drawing the filament bundles through air flow, and lapping on a lapping machine to respectively obtain fiber nets A;
s4 solution jet spinning: feeding the fiber web A in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by a metering pump, after the spinning solution B is jetted by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle to be drawn by air flow, cooling and solidifying the tows on the fiber web A into filaments under the pressure of solution jet drawing air of 50bar, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: and (3) overlapping the fiber web B obtained in the step S4, putting the fiber web B into a solution jet spinning area for reinforcement to obtain a non-woven fabric, performing hydrophilic treatment on the surface layer of the non-woven fabric, mixing and stirring hydrophilic agent and purified water according to the weight ratio of 1 to 150 into a liquid state, and heating to 53 ℃.
S6 drying: conveying the non-woven fabric subjected to hydrophilic treatment in the step S5 to an oven through a liquid carrying roller for drying at least twice, and firstly pre-drying the non-woven fabric in a first oven at the pre-drying temperature of 105 ℃; and (4) after pre-drying, drying the non-woven fabric in a second drying oven at the drying temperature of 110 ℃, trimming by a winding machine, coiling, packaging and leaving the factory.
This embodiment adopts and spins the production that the lapping was spun earlier and then solution jet spinning carries out non-woven fabrics 6, can make non-woven fabrics 6 have fluffy sense, thick sense, increases brute force, the filter capacity of non-woven fabrics, can replace melt-blown fabric reduction in production cost, and hydrophilic treatment is done to the top layer of non-woven fabrics 6 to this embodiment, hydrophilicity that can effectual improvement non-woven fabrics.
And (3) effect testing:
the nonwoven fabric and the air filter manufactured in the above examples were tested for their performance (see tables 1 and 2, respectively), and the test results were compared with the existing products, and the results were as follows:
table 1: comparison of air permeability, pore size, burst strength, stiffness, and antibacterial Activity
TABLE 2 filtration efficiency of the nonwoven fabric filter provided by the invention (taking the grammage of 180-
2. Test standard
The criteria used for the above tests are as follows:
the GB/T3820-1997 standard is adopted for thickness measurement; the air permeability is measured by GB/T5453-1997 standard; the aperture measurement adopts GB/T2679.14-1996 standard; the burst strength is determined by adopting the GB/T454-1989 standard; the measurement of the stiffness adopts GB/T2679.3-1996 standard; the bacteriostasis is measured by adopting a shaking flask test of 'Disinfection technical Specification' of Ministry of health (2002 edition) 2.1.8.7;
the determination of the classification efficiency of the non-woven fabric filter is tested on a test bed conforming to GB/14295-.
3. Analysis of test results
Table 1 the results show that: in the aspects of air permeability, aperture, bursting strength, stiffness, antibacterial activity and the like, the effect of the non-woven fabric 1-6 prepared by the preparation method of the non-woven fabric is obviously superior to that of the PET needle-punched non-woven fabric filter material and filter paper in the market. The effect of the non-woven fabric filter material provided by the invention is obviously superior to that of the existing product.
Table 2 the results show: filters made from non-woven fabrics meet the classification standards for high-medium and sub-high efficiency filters in GB 12218-89.
4. Conclusion
The preparation method of the non-woven fabric provided by the invention not only can enable the non-woven fabric 1-6 to have fluffy and thick feelings, but also can increase the strength and filtering capacity of the non-woven fabric 1-6, has lower pressure drop, can replace melt-blown fabric, and reduces the production cost, and the invention can carry out hydrophilic treatment on the surface layer of the non-woven fabric 1-6, and can effectively improve the hydrophilicity of the non-woven fabric 1-6.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The preparation method of the non-woven fabric is characterized by comprising the following preparation steps:
preparing S1 raw material: mixing the raw materials a, extruding and melting the mixture by a screw extruder to obtain a melt a, dissolving the raw materials b in a solvent, adding the dissolved raw materials b into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b;
s2 filtering: filtering the prepared melt a and the spinning solution b obtained in the step S1 through filters respectively to remove impurities, and then feeding the melt a and the spinning solution b into a spinning assembly respectively;
s3 spinning into net: quantitatively feeding the melt a and the spinning solution b filtered in the step S2 into a spinning assembly by using metering pumps respectively, spraying the melt a and the spinning solution b by using a spinneret plate of a spinning machine, cooling and solidifying the melt a and the spinning solution b into filaments, guiding the filaments into a drawing nozzle, drawing the filaments by using air flow, and lapping on a lapping machine to obtain a fiber web A;
s4 solution jet spinning: feeding the fiber web A obtained in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by using a metering pump, after the spinning solution B is jetted out by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle, drawing the tows by using air flow, cooling and solidifying the tows on the fiber web A into filaments, and laying a net on a net forming machine to obtain a fiber web B;
s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric;
s6 drying: and (4) inputting the non-woven fabric subjected to the solution jet spinning in the step S5 into an oven for drying.
2. The method of claim 1, wherein the raw material a and the raw material b have different compositions or the raw material a and the raw material b have the same composition.
3. The method for preparing the non-woven fabric according to any one of claims 1 to 2, wherein when the components of the raw material a and the raw material b are different, the raw material a consists of the following raw materials in parts by weight: 81-86.5 parts of polypropylene, 12.5-16 parts of propenyl elastomer, 0.5-1.5 parts of soft master batch and 0.5-1.5 parts of titanium dioxide; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.
4. The method for preparing the non-woven fabric according to any one of claims 1 to 2, wherein when the components of the raw material a and the raw material b are the same, the raw material a consists of the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.
5. The method of preparing a nonwoven fabric according to claim 1, wherein the drawing wind pressure of the solution jet control air stream of the solution jet spinning head in the steps of S3 and S4 is 2bar to 70bar, respectively.
6. The method of manufacturing a nonwoven fabric according to claim 1, wherein the nonwoven fabric obtained by the solution jet spinning in the step S5 is subjected to a hydrophilic treatment.
7. The method for producing a nonwoven fabric according to claim 6, wherein the hydrophilic treatment liquid used in the hydrophilic treatment step is obtained by mixing and stirring a hydrophilic agent and purified water at a weight ratio of 1 to 150.
8. The method of claim 1, wherein the step of drying in step S6 comprises pre-drying the nonwoven fabric in a first oven, and the pre-dried nonwoven fabric is dried in a second oven.
9. The method of claim 8, wherein the pre-drying is carried out in a single oven at a temperature of
The temperature for drying in the second drying oven is
10. The method of claim 1, wherein the step S2 is performed by two-stage filtration including pre-filtration and fine filtration, the pre-filtration has a particle size of less than 80um, and the fine filtration has a particle size of less than 30 um.
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