CN114536931A - Single-conductivity sweat-discharging fabric and preparation method thereof - Google Patents

Single-conductivity sweat-discharging fabric and preparation method thereof Download PDF

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Publication number
CN114536931A
CN114536931A CN202210276310.0A CN202210276310A CN114536931A CN 114536931 A CN114536931 A CN 114536931A CN 202210276310 A CN202210276310 A CN 202210276310A CN 114536931 A CN114536931 A CN 114536931A
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parts
layer
antibacterial
fabric
sweat
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CN202210276310.0A
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Chinese (zh)
Inventor
贾右兵
闫韶华
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Heze Yuanlinchuan Clothing Co ltd
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Heze Yuanlinchuan Clothing Co ltd
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Priority to CN202210276310.0A priority Critical patent/CN114536931A/en
Publication of CN114536931A publication Critical patent/CN114536931A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • 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
    • D01F1/103—Agents inhibiting growth of microorganisms
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/94—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of other polycondensation products
    • 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
    • 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
    • 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
    • D04H3/009—Condensation or reaction polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester 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
    • B32B2262/0292—Polyurethane 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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • B32B2437/00—Clothing

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses a single sweat-conducting and sweat-discharging fabric and a preparation method thereof. The skin-friendly layer, the drainage layer and the antibacterial layer are respectively prepared by electrostatic spinning, and the skin-friendly layer, the drainage layer and the antibacterial layer are sequentially combined from inside to outside through hot pressing to obtain the single perspiration-conduction fabric. According to the single sweat conducting and releasing fabric prepared by the invention, polyvinyl alcohol and hydroxypropyl trimethyl ammonium chloride chitosan are added into the antibacterial injection, and the antibacterial layer prepared by electrostatic spinning has a stronger antibacterial effect. Moreover, the water transmission of the fabric is further improved. Provides a new strategy for developing novel moisture absorption and sweat releasing fabrics.

Description

Single-conductivity sweat-discharging fabric and preparation method thereof
Technical Field
The invention relates to the technical field of textiles, in particular to a single-conductivity sweat-discharging fabric and a preparation method thereof.
Background
With the development of economy and the progress of society, people put higher demands on the comfort and the functionality of clothes, and multifunctional textiles such as waterproof moisture permeability, moisture absorption quick-drying, heat conduction cool feeling and the like are widely concerned. The moisture-oriented controllable functional fabric can effectively adjust moisture to keep human bodies dry and comfortable, and is very important for personal comfort. The functional fabric with unidirectional water delivery attracts people's attention.
CN 112251919A provides a fabric with good one-way moisture-conducting performance, a fabric base material is pretreated by calcium salt solution, then polyvinyl alcohol/sodium alginate solution is adopted, formed fibers are deposited on a single surface of the fabric through an electrostatic spinning method, polyvinyl alcohol/sodium alginate forms a polyvinyl alcohol/calcium alginate gel layer in situ on the surface of the fabric, and the spinning layer is further crosslinked through a crosslinking agent to form a crosslinked polyvinyl alcohol/calcium alginate (PVA/SA) functional layer. Through the treatment mode, the obtained product has the effects of discharging internal sweat, balancing internal and external humidity, and simultaneously has good air permeability and antistatic property, the wearing comfort of clothes can be improved, so that the unidirectional moisture-conducting fabric is obtained, and the obtained fabric has good air permeability and antistatic property.
CN 113026183A discloses a preparation method of a polylactic acid knitted fabric with a unidirectional moisture-conducting function, long-chain fatty alcohol is prepared, levorotatory polylactic acid is selected as polylactic acid for fiber preparation, the prepared long-chain fatty alcohol and polylactic acid are simultaneously dissolved in dichloromethane, stirring is continuously carried out in the dissolving process until the prepared solution is transparent and stable liquid, the solution with the mass concentration of 20-40% is prepared, and the spinning of polylactic acid fibers is carried out; carrying out electrostatic spinning on the prepared spinning solution on an electrostatic spinning machine, and knitting and forming; knitting by a weft knitting double-faced knitting machine, wherein a knitting system comprises a 12-path knitting system, and the knitting system comprises a cylinder needle and a dial needle; the cylinder needle is divided into four sections of knitting needles which are arranged as follows: 1234; the dial needles are arranged at 1 by high-heel needles and low-heel needles.
The existing single-layer sweat conducting and releasing fabric is complex in preparation method and lacks of evaluation on antibacterial performance of the fabric. Membranes with unidirectional fluid penetration and antimicrobial activity are difficult to produce, considering the material type and processing method. Therefore, it is necessary to provide a fabric with antibacterial property and good unidirectional water conveying capacity.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problems solved by the present invention are: (1) the single sweat conducting and releasing fabric is provided, so that the fabric has a one-way moisture conducting function; (2) the step of introducing the antibacterial component into the fabric is simplified, and the technical problem of the reduction of the moisture-conducting capacity caused by the fact that the original hydrophobic-hydrophilic gradient balance of the fabric is damaged by introducing the antibacterial substance is solved; (3) aiming at the antibacterial substance used in the invention, the cationic waterborne polyurethane adapted to the antibacterial substance is prepared, and the technical problem of reduced antibacterial effect caused by poor ionization of guanidine radical after the waterborne polyurethane and the modified polyhexamethylene guanidine are combined is solved.
The traditional breathable sweat-discharging fabric generally increases the water diffusion rate in a mode of increasing the contact area with air, so as to achieve the effect of breathable sweat discharging; however, the disadvantage of this method is that the movement of moisture is bidirectional, and if the environmental humidity is too high, the external moisture can also permeate into the fabric, which greatly hinders the perspiration. In order to solve the problem, a plurality of fabrics with the one-way moisture-conducting function are published, and the one-way moisture-conducting function is realized by constructing an asymmetric structure with different hydrophobic and hydrophilic gradients to generate extra pressure difference between a hydrophobic area and a hydrophilic area; in the prior art, the purpose of one-way moisture conduction is usually realized by adopting modes such as chemical finishing, surface modification or in-situ polymerization, but the used manufacturing process is complicated.
The common unidirectional moisture-conducting fabric does not have antibacterial performance, and in order to enable the fabric to have antibacterial capability, the fabric is generally required to be finished by using antibacterial liquid or an antibacterial coating is introduced. The inventor finds that the antibacterial performance of the unidirectional moisture-conducting fabric given by the conventional method can seriously weaken the unidirectional moisture-conducting capability of the fabric; because the unidirectional moisture-conducting fabric needs to construct an asymmetric structure with different hydrophobic and hydrophilic gradients, the hydrophilic layer and the hydrophobic layer need to have a uniform gradient relation, and the original gradient balance of the fabric can be damaged by introducing antibacterial substances in a subsequent antibacterial liquid finishing mode, so that the moisture-conducting capacity is reduced; the antibacterial coating introduces an additional functional layer into the fabric, and the coating, the original hydrophobic layer and the hydrophilic layer are difficult to form a uniform gradient relation, so that the moisture-conducting capacity is reduced. Most of traditional antibacterial substances are micromolecular antibacterial agents, and in actual production and use, the micromolecular antibacterial agents are small in particle size, are not firmly adsorbed after being attached to fabric fibers, and are easy to run off after being washed or used for a long time; polyhexamethylene guanidine as a macromolecular organic substance has a longer molecular chain than a micromolecular antibacterial agent, guanidino can form a stable eight-membered ring with phosphate radical in phospholipid and can penetrate cell membranes to achieve a sterilization effect, but polyhexamethylene guanidine is easy to dissolve in water, and further treatment needs to be carried out on polyhexamethylene guanidine in order to prevent loss along with water in the using process. Aiming at the technical problems, the inventor modifies polyhexamethylene guanidine to reduce water solubility by introducing a fat-soluble molecular chain segment, takes the polyhexamethylene guanidine as a partial raw material of electrostatic spinning injection, prepares a functional layer with an antibacterial function by one step of spinning and takes the functional layer as a part of a one-way moisture-conducting composite layer, and further avoids the damage of subsequent additional antibacterial finishing operation on the hydrophilic-hydrophobic gradient balance of the fabric.
The waterborne polyurethane is a novel polyurethane, can replace an organic solvent with water as a dispersion medium, and has the advantages of no pollution, safety, reliability, excellent mechanical property, good compatibility, easy modification and the like. The inventor finds that in the field of textile fabrics, the permeability of the waterborne polyurethane is far less than that of the solvent-borne polyurethane, and the waterborne polyurethane is particularly suitable for being used as a finishing agent of thin-layer fabrics needing good air permeability and sweat permeability; compared with solvent type polyurethane, the waterborne polyurethane can improve the wear resistance, wrinkle resistance, rebound resilience, water resistance, heat resistance and washing resistance of the fabric, and can also improve the dyeing depth and fastness of the fabric.
The single sweat conducting and releasing fabric is prepared by the following method:
s1, dissolving polyurethane in an organic solvent to obtain a polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer for later use;
s2, dissolving polylactic acid-glycolic acid copolymer and polyacrylonitrile in an organic solvent to obtain a blend; adding sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer for later use;
s3, dissolving fat-soluble polyhexamethylene guanidine modified waterborne polyurethane or hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane in water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
Preferably, in the electrostatic spinning process in the steps S1-S3, the inner diameter of the injection needle is 0.35-0.42 mm, the injection rate is 0.05-0.2 mL/min, the spinning distance is 16-22 cm, the voltage is 18-24 kV, the drying temperature is 35-50 ℃, and the relative humidity is 20-30%.
Preferably, the amount of the polyurethane used in step S1 is 6 to 12 parts by weight; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 8-15 parts; the thickness of the skin-friendly layer is 180-220 mu m.
Preferably, the polylactic acid-glycolic acid copolymer is used in the step S2 in an amount of 6 to 12 parts by weight; the usage amount of polyacrylonitrile is 4-8 parts; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 24-32 parts; the usage amount of the sodium polyacrylate is 1.5-3 parts; the thickness of the drainage layer is 120-150 mu m.
Preferably, the use amount of the fat-soluble polyhexamethylene guanidine-modified aqueous polyurethane or the hydrophobic polyhexamethylene guanidine-modified cationic aqueous polyurethane in the step S3 is 14 to 22 parts by weight; the using amount of the water is 16-28 parts; the thickness of the antibacterial layer is 110-130 mu m.
Preferably, the preparation method of the fat-soluble polyhexamethylene guanidine-modified aqueous polyurethane in the step S3 is as follows:
x1 is prepared by adding 0.04-0.09 part of sodium laurate into 1.5-2.5 parts of water by weight, heating to 85-95 ℃, and mixing for 0.5-2 hours; continuously adding 0.018-0.036 parts of polyhexamethylene guanidine, reacting for 1-3 hours, cooling to room temperature, filtering to obtain a filter cake, washing with water, and drying to obtain fat-soluble polyhexamethylene guanidine for later use;
and X2, heating 32-40 parts by weight of waterborne polyurethane to 65-75 ℃, adding the fat-soluble polyhexamethylene guanidine obtained in the step X1, mixing for 5-20 min, and cooling to room temperature to obtain the fat-soluble polyhexamethylene guanidine modified waterborne polyurethane.
The guanidyl has extremely strong capability of killing bacteria, has broad spectrum and high efficiency and has long-term bacteriostatic action; however, in use, the inventor finds that the technical problem of insufficient ionization of guanidine groups occurs after polyhexamethylene guanidine or fat-soluble polyhexamethylene guanidine is added into the aqueous polyurethane. The inventor obtains through observation and analysis that the phenomenon may be caused by the fact that the waterborne polyurethane used in the market is usually anionic or nonionic waterborne polyurethane, the anionic waterborne polyurethane and the guanidino have a strong electrostatic attraction effect, ionization of the guanidino is inhibited after the anionic waterborne polyurethane and the guanidino are combined, and a normal bacteriostatic effect is difficult to exert; the non-ionic aqueous polyurethane is less attractive but still allows the normal ionization of the guanidinium groups to be affected. The inventor further improves the method, and prepares a cationic waterborne polyurethane on the basis of the fat-soluble polyhexamethylene guanidine modified waterborne polyurethane to adapt to the fat-soluble polyhexamethylene guanidine, so that guanidine groups can be well ionized and an excellent antibacterial effect can be exerted.
Preferably, the preparation method of the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane in the step S3 is as follows:
y1 is prepared by adding 0.04-0.09 part of sodium laurate into 1.5-2.5 parts of water by weight, heating to 85-95 ℃, and mixing for 0.5-2 hours; continuously adding 0.018-0.036 parts of polyhexamethylene guanidine, reacting for 1-3 hours, cooling to room temperature, filtering to obtain a filter cake, washing with water, and drying to obtain fat-soluble polyhexamethylene guanidine for later use;
mixing 7.2-10.8 parts by weight of isophorone diisocyanate, 16.8-25.2 parts by weight of polyether polyol, 2.6-3.9 parts by weight of 1, 4-butanediol and 0.01-0.015 part by weight of dibutyltin dilaurate in Y2 under an oxygen-free environment; after mixing, heating to 75-85 ℃ for reaction for 0.5-2 h; cooling to 45-60 ℃, adding 2-3 parts of methyldiethanolamine, and mixing for 10-30 min; continuously heating to 65-75 ℃, firstly reacting for 0.5-1 h, then adding the fat-soluble polyhexamethylene guanidine obtained in the step Y1, and then continuously reacting for 1-2 h; and (3) cooling to 40-50 ℃, adding 1.1-1.6 parts of acetic acid, mixing for 10-30 min, and cooling to room temperature to obtain the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane.
Preferably, the operation temperature of the hot pressing in the step S4 is 110-130 ℃, and the pressure is 0.2-0.4 kg/cm2。
Through a large amount of production practices, the inventor finds that the antibacterial layer prepared by electrostatic spinning by adding polyvinyl alcohol and hydroxypropyl trimethyl ammonium chloride chitosan into the antibacterial injection has stronger antibacterial effect. Moreover, the fabric has a better one-way transmission value for water transmission. Provides a new strategy for developing novel moisture absorption and sweat releasing fabrics.
Preferably, the single sweat conducting and releasing fabric is prepared by the following method:
s1, dissolving polyurethane in an organic solvent to obtain a polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer for later use;
s2, dissolving polylactic acid-glycolic acid copolymer and polyacrylonitrile in an organic solvent to obtain a blend; adding sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer for later use;
s3, dissolving hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane, polyvinyl alcohol and hydroxypropyl trimethyl ammonium chloride chitosan in water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
Preferably, in the electrostatic spinning process in the steps S1-S3, the inner diameter of the injection needle is 0.35-0.42 mm, the injection rate is 0.05-0.2 mL/min, the spinning distance is 16-22 cm, the voltage is 18-24 kV, the drying temperature is 35-50 ℃, and the relative humidity is 20-30%.
Preferably, the amount of the polyurethane used in step S1 is 6 to 12 parts by weight; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 8-15 parts; the thickness of the skin-friendly layer is 180-220 mu m.
Preferably, the polylactic acid-glycolic acid copolymer is used in the step S2 in an amount of 6 to 12 parts by weight; the usage amount of polyacrylonitrile is 4-8 parts; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 24-32 parts; the usage amount of the sodium polyacrylate is 1.5-3 parts; the thickness of the drainage layer is 120-150 mu m.
Preferably, the use amount of the fat-soluble polyhexamethylene guanidine-modified aqueous polyurethane or the hydrophobic polyhexamethylene guanidine-modified cationic aqueous polyurethane in the step S3 is 14 to 22 parts by weight; the usage amount of the polyvinyl alcohol is 1-3 parts; 0.1-0.3 part of hydroxypropyl trimethyl ammonium chloride chitosan; the using amount of the water is 13-25 parts; the thickness of the antibacterial layer is 110-130 mu m.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The introduction and the function of part of raw materials in the formula of the invention are as follows:
polyhexamethylene guanidine: a high-molecular polymer with high antibacterial effect. The modified raw material is used in the invention.
Sodium laurate: a chemical substance is used as soap, detergent, insecticide, or organic synthesis. The modified raw material is used in the invention.
Hydroxypropyl trimethyl ammonium chloride chitosan belongs to chitosan derivatives, and has good water solubility, antibacterial property, conditioning property and biodegradability. The modifier is used as an antibacterial layer modifier in the invention.
The invention has the beneficial effects that:
compared with the prior art, the invention combines the antibacterial component with the textile raw material by using an integrated process, and prepares the single sweat-conducting fabric with different hydrophilic-hydrophobic gradients by adopting a one-step method, thereby effectively avoiding the damage to the hydrophobic-hydrophilic gradient balance caused by the subsequent treatment of the fabric in the prior art, and improving the stability of the one-way moisture conduction of the fabric.
Compared with the prior art, the fabric obtained by modifying the polyhexamethylene guanidine by using the fat-soluble long chain has good washing resistance, and the antibacterial components cannot be lost after multiple times of washing, so that the fabric still can exert good antibacterial effect.
Compared with the prior art, the water-based polyurethane is used in the invention, the water-based polyurethane can be well adapted to the modified polyhexamethylene guanidine, the guanidine can be smoothly ionized, and the prepared fabric has better antibacterial stability than the prior art.
Compared with the prior art, the invention uses the polyhexamethylene guanidine modified cationic waterborne polyurethane, the polyvinyl alcohol and the hydroxypropyl trimethyl ammonium chloride chitosan as the components of the antibacterial layer, and the antibacterial layer after electrostatic spinning has better antibacterial property, washing resistance and stronger water permeability.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the invention thereto. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Some raw material parameters in the comparative examples and examples of the invention are as follows:
polylactic acid-glycolic acid copolymer, CAS No.: 26780-50-7;
polyhexamethylene guanidine, CAS No.: 57028-96-3;
isophorone diisocyanate, CAS No.: 4098-71-9;
polyether polyol, CAS No.: 9003-11-6;
methyldiethanolamine, CAS No.: 4767-03-7.
Example 1
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of waterborne polyurethane and 0.0025kg of polyhexamethylene guanidine in 2.2kg of water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer, wherein the thickness of the antibacterial layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat-conducting and sweat-releasing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The hot pressing in the step S4 has an operating temperature of 115 ℃ and a pressure of 0.2kg/cm2。
Example 2
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of fat-soluble polyhexamethylene guanidine modified waterborne polyurethane in 2.2kg of water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer, wherein the thickness of the antibacterial layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The preparation method of the fat-soluble polyhexamethylene guanidine modified waterborne polyurethane comprises the following steps:
x1 adding 0.005kg sodium laurate to 0.16kg water, heating to 85 deg.C and mixing for 1.5 h; continuously adding 0.0025kg of polyhexamethylene guanidine, reacting for 1.5h, cooling to room temperature, filtering to obtain a filter cake, washing with water for 3 times, and drying to obtain fat-soluble polyhexamethylene guanidine for later use;
x2 heating 3.6kg of waterborne polyurethane to 70 ℃, then adding the fat-soluble polyhexamethylene guanidine obtained in the step X1, mixing at the speed of 1200rpm for 20min, and cooling to room temperature to obtain the fat-soluble polyhexamethylene guanidine modified waterborne polyurethane.
The operation temperature of the hot pressing in the step S4 is 115 ℃, and the pressure is 0.2kg/cm2。
Example 3
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of polyhexamethylene guanidine modified cationic waterborne polyurethane in 2.2kg of water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer, wherein the thickness of the antibacterial layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The preparation method of the polyhexamethylene guanidine modified cationic waterborne polyurethane comprises the following steps:
under the protection of nitrogen, 1.08kg of isophorone diisocyanate, 2.52kg of polyether polyol, 0.39kg of 1, 4-butanediol and 0.0015kg of dibutyltin dilaurate were mixed; after mixing, heating to 85 ℃ to react for 1.5 h; cooling to 55 deg.C, adding 0.25kg of methyldiethanolamine, and mixing for 20 min; continuously heating to 75 ℃, firstly reacting for 0.5h, then adding 0.0025kg of polyhexamethylene guanidine, and then continuously reacting for 2 h; and (3) cooling to 40 ℃, adding 0.13kg of acetic acid, mixing for 15min, and cooling to room temperature to obtain the polyhexamethylene guanidine modified cationic waterborne polyurethane.
The operation temperature of the hot pressing in the step S4 is 115 ℃, and the pressure is 0.2kg/cm2。
Example 4
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane in 2.2kg of water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer, wherein the thickness of the antibacterial layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The preparation method of the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane comprises the following steps:
y1 adding 0.005kg sodium laurate to 0.16kg water, heating to 85 deg.C and mixing for 1.5 h; continuously adding 0.0025kg of polyhexamethylene guanidine, reacting for 1.5h, cooling to room temperature, filtering to obtain a filter cake, washing with water for 3 times, and drying to obtain fat-soluble polyhexamethylene guanidine for later use;
under the protection of Y2 nitrogen, 1.08kg of isophorone diisocyanate, 2.52kg of polyether polyol, 0.39kg of 1, 4-butanediol and 0.0015kg of dibutyltin dilaurate were mixed; after mixing, heating to 85 ℃ to react for 1.5 h; cooling to 55 deg.C, adding 0.25kg methyldiethanolamine, and mixing for 20 min; continuously heating to 75 ℃, firstly reacting for 0.5h, then adding the fat-soluble polyhexamethylene guanidine obtained in the step Y1, and then continuously reacting for 2 h; and cooling to 40 ℃, adding 0.13kg of acetic acid, mixing for 15min, and cooling to room temperature to obtain the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane.
The operation temperature of the hot pressing in the step S4 is 115 ℃, and the pressure is 0.2kg/cm2。
Example 5
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane, 0.27kg of polyvinyl alcohol and 0.03kg of hydroxypropyl trimethyl ammonium chloride chitosan in 1.9kg of water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer, wherein the thickness of the antibacterial layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The preparation method of the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane is the same as that in example 4, and the details are not repeated here. .
The operation temperature of the hot pressing in the step S4 is 115 ℃, and the pressure is 0.2kg/cm2。
Comparative example 1
The single sweat conducting and releasing fabric is prepared by the following method:
s1 dissolving 0.8kg of polyurethane in 1.4kg of tetrahydrofuran to obtain polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer, wherein the thickness of the skin-friendly layer is 220 microns for later use;
s2 dissolving 0.75kg of polylactic acid-glycolic acid copolymer and 0.45kg of polyacrylonitrile in 2.8kg of tetrahydrofuran to obtain a blend; adding 0.21kg of sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer, wherein the thickness of the drainage layer is 140 microns for later use;
s3, dissolving 1.8kg of waterborne polyurethane in 2.2kg of water to obtain an external contact layer injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an external contact layer, wherein the thickness of the external contact layer is 110 microns for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the external contact layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric.
In the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.36mm, the injection rate is 0.08mL/min, the spinning distance is 18cm, the voltage is 22kV, the drying temperature is 45 ℃, and the relative humidity is 25%.
The operation temperature of the hot pressing in the step S4 is 115 ℃, and the pressure is 0.2kg/cm2。
Test example 1
The antibacterial performance test of the single sweat conducting and releasing fabric refers to GB/T20944.2-2007 evaluation part 2 of antibacterial performance of textiles: the absorption method was carried out as specifically described in the section. The samples of each example or control were divided into 3 groups, and each group was prepared by cutting 3 small samples of 10cm × 10cm in size into 2 pieces on average. In the three groups of samples, the first group was not subjected to the washing operation, the second group was washed 50 times, and the third group was washed 100 times, and the three groups of samples were subjected to the antibacterial performance test. The washing method is carried out according to the specific requirements in GB/T8629 and 2017 household washing and drying program for textile test, a C-type standard washing machine is used, and the number of the washing program is 4N. The bacteriostasis rate result is obtained by calculating the average value of the numbers according to the requirement and is rounded to an integer number. The antibacterial performance test results of the single-conductivity sweat-discharging fabric are shown in table 1.
TABLE 1
Figure BDA0003556116190000161
Figure BDA0003556116190000171
Note: the numbers 0, 50, 100 indicated in the table are the number of washes.
Evaluation of antibacterial properties of textiles according to section 2: according to the definition in the absorption method, when the bacteriostasis rate is more than or equal to 90 percent, the sample has the antibacterial effect; when the bacteriostasis rate is more than or equal to 99 percent, the sample has good antibacterial effect. As can be seen from the comparison between the above examples and comparative examples, examples 4 and 5 exhibited excellent antibacterial effects, and antibacterial stability was maintained even after many washes. The reason for this is probably that the modified polyhexamethylene guanidine introduces fat-soluble molecular chain segments to reduce water solubility, is not easy to dissolve in water and run off in the presence of moisture, and can endure multiple times of washing; meanwhile, the modified polyhexamethylene guanidine has good adaptability with self-made cationic waterborne polyurethane, and guanidine groups can be normally ionized and exert bacteriostatic effects in the environment where bacteria exist. In addition, the hydroxypropyl trimethyl ammonium chloride chitosan with charged quaternary ammonium salt groups kills bacteria through electrostatic action; the crosslinking effect of the polyvinyl alcohol and the hydroxypropyl trimethyl ammonium chloride chitosan also improves the washability of the fabric, and the fabric can still keep a good antibacterial effect after 100 times of washing. Example 3 had a higher initial antimicrobial effect than example 2, probably because the guanidinium group of the antimicrobial component in example 3 was ionized to ease example 2; however, the antibacterial effect of example 3 was lost to a greater extent than that of example 2, because polyhexamethylene guanidine was lost when dissolved in water during washing, which may result in a decrease in the antibacterial effect.
Test example 2
The method and the steps adopted for testing the air permeability of the single sweat-conducting and sweat-releasing fabric refer to GB/T5453-1997 determination of textile fabric air permeability, 5 samples are tested in each embodiment or comparison example, and the test area of the sample is 20cm2The test pressure drop was 100Pa, and the arithmetic mean was taken as required. The quick-drying performance test of the single sweat-conducting fabric refers to GB/T21655.1-2008' evaluation part 1 of moisture absorption and quick-drying of textiles: the requirements of the individual combination test method are specifically that 5 samples are tested in each example or comparative example, the samples are flat and have no wrinkles, the size is 15cm multiplied by 15cm, the test results are arithmetically averaged according to the requirements, and the moisture-conducting form of the fabric is observed and marked. The test results of the air permeability and the quick drying performance of the single sweat conducting and releasing fabric are shown in the table 2.
TABLE 2
Figure BDA0003556116190000181
According to the definition in the national standard, when the air permeability of the fabric is not less than 180mm/s, the fabric has excellent air permeability; when the evaporation rate is not less than 0.18g/h, the fabric has excellent sweat-discharging performance. According to the test results of the embodiment and the comparison example, the single sweat conducting and discharging fabric with the three-layer structure prepared by the electrostatic spinning process meets the requirement of one-way moisture conduction, and simultaneously has excellent air permeability and sweat discharging performance. The reason for this phenomenon may be that the electrospinning process can prepare a fabric with a light and thin thickness, which is beneficial to exchange of gas and moisture; the three-layer structure constructed by the skin-friendly layer, the drainage layer and the antibacterial layer has different hydrophobic and hydrophilic gradients, and the asymmetric structure can effectively absorb and pump water.
To investigate the transmission of water through the fabric, the temporal change in the water contact angle of the fabric was quantified by testing the water contact angle change (contact angle changes from 100 ° to 0 °). The water drops on the skin-friendly layer and is diffused by the skin-friendly layer. The results are shown in Table 3.
TABLE 3
Test set Time(s)
Example 4 7.5
Example 5 4.2
As can be seen from the test results of table 3, the time for example 5 to transition from a water contact angle of 100 ° to 0 ° is much faster relative to example 4. This is probably because the presence of hydroxypropyl trimethylammonium chloride chitosan, which makes the antibacterial layer more hydrophilic, enables the water droplets to diffuse on the hydrophilic side and increases the driving force for water transport from the hydrophobic side to the hydrophilic side. Thus, the pumping performance of water from the skin-friendly layer to the antibacterial layer is enhanced.

Claims (6)

1. The preparation method of the single sweat conducting and releasing fabric is characterized by comprising the following steps:
s1, dissolving polyurethane in an organic solvent to obtain a polyurethane injection; spinning the polyurethane injection into a film by an electrostatic spinning process to obtain a skin-friendly layer for later use;
s2, dissolving polylactic acid-glycolic acid copolymer and polyacrylonitrile in an organic solvent to obtain a blend; adding sodium polyacrylate into the blend continuously, and mixing to obtain a mixed injection; spinning the mixed injection into a film by an electrostatic spinning process to obtain a drainage layer for later use;
s3, dissolving hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane, polyvinyl alcohol and hydroxypropyl trimethyl ammonium chloride chitosan in water to obtain an antibacterial injection; spinning the antibacterial injection into a film by an electrostatic spinning process to obtain an antibacterial layer for later use;
s4, sequentially combining the skin-friendly layer, the drainage layer and the antibacterial layer through hot pressing from inside to outside to obtain the single sweat conducting and removing fabric;
the preparation method of the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane comprises the following steps:
y1 is prepared by adding 0.04-0.09 part of sodium laurate into 1.5-2.5 parts of water by weight, heating to 85-95 ℃, and mixing for 0.5-2 hours; continuously adding 0.018-0.036 parts of polyhexamethylene guanidine, reacting for 1-3 hours, cooling to room temperature, filtering to obtain a filter cake, washing with water, and drying to obtain fat-soluble polyhexamethylene guanidine for later use;
mixing 7.2-10.8 parts by weight of isophorone diisocyanate, 16.8-25.2 parts by weight of polyether polyol, 2.6-3.9 parts by weight of 1, 4-butanediol and 0.01-0.015 part by weight of dibutyltin dilaurate in Y2 under an oxygen-free environment; after mixing, heating to 75-85 ℃ for reaction for 0.5-2 h; cooling to 45-60 ℃, adding 2-3 parts of methyldiethanolamine, and mixing for 10-30 min; continuously heating to 65-75 ℃, firstly reacting for 0.5-1 h, then adding the fat-soluble polyhexamethylene guanidine obtained in the step Y1, and then continuously reacting for 1-2 h; and (3) cooling to 40-50 ℃, adding 1.1-1.6 parts of acetic acid, mixing for 10-30 min, and cooling to room temperature to obtain the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane.
2. The preparation method of the single sweat conducting and releasing fabric according to claim 1, wherein in the electrostatic spinning process in the steps S1-S3, the inner diameter of an injection needle is 0.35-0.42 mm, the injection rate is 0.05-0.2 mL/min, the spinning distance is 16-22 cm, the voltage is 18-24 kV, the drying temperature is 35-50 ℃, and the relative humidity is 20-30%.
3. The preparation method of the single sweat-conducting and sweat-discharging fabric as claimed in claim 1, wherein the amount of the polyurethane used in the step S1 is 6-12 parts by weight; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 8-15 parts; the thickness of the skin-friendly layer is 180-220 mu m.
4. The preparation method of the single sweat-conducting and sweat-discharging fabric according to claim 1, wherein the usage amount of the polylactic acid-glycolic acid copolymer in the step S2 is 6-12 parts by weight; the usage amount of polyacrylonitrile is 4-8 parts; the organic solvent is tetrahydrofuran, and the using amount of the organic solvent is 24-32 parts; the usage amount of the sodium polyacrylate is 1.5-3 parts; the thickness of the drainage layer is 120-150 mu m.
5. The preparation method of the single sweat-conducting and sweat-discharging fabric according to claim 1, wherein the usage amount of the hydrophobic polyhexamethylene guanidine modified cationic waterborne polyurethane in the step S3 is 14-22 parts by weight; the usage amount of the polyvinyl alcohol is 1-3 parts; 0.1-0.3 part of hydroxypropyl trimethyl ammonium chloride chitosan; the using amount of the water is 13-25 parts; the thickness of the antibacterial layer is 110-130 mu m.
6. The fabric with single function of sweat conducting and discharging is characterized by being prepared by the preparation method of any one of claims 1-5.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118007442A (en) * 2024-02-04 2024-05-10 广东云蝶园内衣科技有限公司 Unidirectional moisture-conducting fabric and preparation method thereof

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