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CN-121992668-A - Single-sided waterproof single-sided water-absorbing fabric and preparation process thereof

CN121992668ACN 121992668 ACN121992668 ACN 121992668ACN-121992668-A

Abstract

The invention relates to the technical field of textile, and particularly discloses a single-sided waterproof single-sided water-absorbing fabric and a preparation process thereof. The preparation process of the single-sided waterproof single-sided water-absorbing fabric comprises weaving a double-layer single-sided moisture-guiding fabric, wherein the fabric comprises an inner layer and an outer layer, the inner layer is woven by hydrophilic-hydrophobic composite fiber yarns, the outer layer is woven by hydrophilic moisture-guiding fiber yarns, the surface of the outer layer of the fabric is coated with fluorine-free waterproof slurry, the fluorine-free waterproof slurry comprises micro-nano composite particles, fluorine-free waterproof auxiliary agents, binders, dispersing agents and deionized water, and the micro-nano composite particles are composite particles obtained by an in-situ polymerization-sol-gel composite method of nano silicon dioxide and micro titanium dioxide. The single-sided waterproof single-sided water-absorbing fabric prepared by the invention has excellent air permeability.

Inventors

  • SUN YIHUA

Assignees

  • 辽宁成大国际贸易有限公司

Dates

Publication Date
20260508
Application Date
20260326

Claims (10)

  1. 1. The preparation process of the single-sided waterproof single-sided water-absorbing fabric is characterized by comprising the following steps of: S1, weaving a double-layer unidirectional moisture-conducting fabric, wherein the fabric comprises an inner layer and an outer layer, the inner layer is woven by hydrophilic-hydrophobic composite fiber yarns, and the outer layer is woven by hydrophilic moisture-conducting fiber yarns; S2, coating fluorine-free waterproof slurry on the surface of the outer layer of the fabric, wherein the fluorine-free waterproof slurry comprises the following raw materials, by weight, 20-30 parts of micro-nano composite particles, 15-25 parts of fluorine-free waterproof auxiliary agents, 40-50 parts of binders, 2-5 parts of dispersing agents and 10-20 parts of deionized water; The micro-nano composite particles are composite particles obtained by an in-situ polymerization-sol-gel composite method of nano silicon dioxide and micro titanium dioxide.
  2. 2. The process for preparing the single-sided waterproof single-sided absorbent fabric according to claim 1, wherein the process for preparing the micro-nano composite particles comprises the following steps: (1) Adding 17-20 parts by weight of micrometer titanium dioxide into 100 parts by weight of methyl methacrylate monomer, adding 0.5-1 part by weight of azodiisobutyronitrile, heating to 75-85 ℃ under the protection of nitrogen, reacting for 1.5h, cooling, and centrifuging to obtain modified micrometer titanium dioxide; (2) Mixing ethyl orthosilicate, ethanol and deionized water according to the volume ratio of (2.5-3.5) (0.8-1.2), regulating the pH value to 2-3, and stirring at room temperature for reacting for 2 hours to obtain nano silicon dioxide sol; (3) Adding modified micrometer titanium dioxide into nanometer silicon dioxide sol, heating to 50-60 ℃, stirring and reacting for 3 hours, drying and grinding to obtain micro-nano composite particles, wherein the mass ratio of the modified micrometer titanium dioxide to the nanometer silicon dioxide sol is 1 (12-15).
  3. 3. The process for preparing the single-sided waterproof single-sided absorbent fabric according to claim 1, wherein the process for preparing the micro-nano composite particles comprises the following steps: (1) Adding 17-20 parts by weight of micrometer titanium dioxide into 100 parts by weight of methyl methacrylate monomer, adding 0.5-1 parts by weight of azodiisobutyronitrile and 3-5 parts by weight of hydroxyethyl acrylate, heating to 75-85 ℃ under the protection of nitrogen, reacting for 1.5 hours, cooling, and centrifuging to obtain modified micrometer titanium dioxide; (2) Mixing ethyl orthosilicate, ethanol and deionized water according to the volume ratio of 1 (2.5-3.5) (0.8-1.2), regulating the pH value to 2-3, stirring at room temperature for reaction for 1h, adding 3-aminopropyl triethoxysilane, and continuing stirring at room temperature for 1h to obtain modified nano silica sol, wherein the addition amount of the 3-aminopropyl triethoxysilane is 2-3% of the mass of the ethyl orthosilicate; (3) Adding modified micrometer titanium dioxide into modified nanometer silicon dioxide sol, heating to 50-60 ℃, stirring and reacting for 3 hours, drying and grinding to obtain micro-nano composite particles, wherein the mass ratio of the modified micrometer titanium dioxide to the modified nanometer silicon dioxide sol is 1 (12-15).
  4. 4. The preparation process of the single-sided waterproof single-sided water-absorbing fabric according to claim 3, wherein the preparation process is characterized in that in the step (3), modified micron titanium dioxide is added into modified nano silicon dioxide sol, the temperature is raised to 50-60 ℃, after stirring and reacting for 2.5h, 0.3-0.5 part by weight of sodium dodecyl benzene sulfonate is added, stirring is continued for 0.5h, and drying and grinding are carried out, so that micro-nano composite particles are obtained, wherein the mass ratio of the modified micron titanium dioxide to the modified nano silicon dioxide sol is 1 (12-15).
  5. 5. The process for preparing the single-sided waterproof single-sided absorbent fabric according to claim 1, wherein the fluorine-free waterproof auxiliary agent is hydroxyl-terminated polydimethylsiloxane.
  6. 6. The preparation process of the single-sided waterproof single-sided water-absorbing fabric according to claim 1, wherein the binder is a mixture of waterborne polyurethane and acrylic ester with the mass ratio of (6-7) (3-4).
  7. 7. The preparation process of the single-sided waterproof single-sided water-absorbing fabric according to claim 1, wherein the raw materials of the fluorine-free waterproof slurry further comprise 3-5 parts by weight of a ventilation regulator, and the ventilation regulator is hydroxyl plasma modified hollow glass microspheres.
  8. 8. The process for preparing the single-sided waterproof single-sided absorbent fabric according to claim 1, wherein the dispersing agent is sodium polycarboxylate.
  9. 9. The process for preparing the single-sided waterproof single-sided water-absorbing fabric according to claim 1, wherein the coating process is doctor blade coating, sectional drying is adopted after coating, pre-drying is carried out for 2-4min at 65-75 ℃, curing is carried out for 5-7min at 110-130 ℃, and finally cold air setting is carried out for 1-3min at 70-90 ℃ to form the waterproof coating with the thickness of 8-10 mu m.
  10. 10. A single-sided waterproof single-sided absorbent fabric, characterized in that the fabric is prepared by adopting the preparation process of the single-sided waterproof single-sided absorbent fabric according to any one of claims 1 to 9.

Description

Single-sided waterproof single-sided water-absorbing fabric and preparation process thereof Technical Field The invention relates to the technical field of textile, in particular to a single-sided waterproof single-sided water-absorbing fabric and a preparation process thereof. Background With the technology upgrading of textile industry and the diversification of consumption demands, the fabric with single-sided waterproof and single-sided water absorbing functions is increasingly applied to the fields of outdoor clothing, medical protection, sports equipment, duty uniforms and the like. The fabric has the two-way functions of blocking outside moisture invasion and rapidly absorbing human sweat or contacting liquid, not only ensures dryness and comfortableness in the use process, but also meets the protection requirements in specific scenes, such as blocking rain water in outdoor scenes, absorbing splash body fluid in medical scenes, preventing permeation, rapidly discharging sweat in sports scenes and the like. In order to realize the single-sided waterproof and single-sided water absorption function, the prior art mainly adopts two methods, namely a multi-layer fabric compounding or film pasting process, a waterproof layer and a water absorption layer are combined to form a functional fabric through adhesive lamination, thermoforming compounding and other modes, and the other method adopts a post-finishing process to perform single-sided functionalization treatment on a single fabric to realize zonal giving of waterproof and water absorption performances. The patent application document with the publication number of CN114836996A discloses a preparation method of a fabric with both single-direction moisture-guiding and waterproof and antifouling functions, which comprises the following steps of (1) weaving a multi-layer fabric with a single-direction moisture-guiding function, wherein the fabric comprises an inner layer of water-repellent fiber and an outer layer of hydrophilic or moisture-guiding fiber, and (2) selectively printing, namely selectively coating slurry containing a waterproof auxiliary agent on the outer layer of the fabric to form a waterproof coating, reserving micro window channels with micropores or grooves, forming the waterproof coating, and drying and curing the waterproof coating, wherein the slurry comprises 1-5% of thickener and 1-10% of waterproof auxiliary agent, and the waterproof auxiliary agent is a conventional fluorine-containing or fluorine-free waterproof auxiliary agent for spinning. The patent application document adopts a mode of combining multi-layer fabrics and after-finishing, a waterproof finishing agent is selectively coated on the surface of the multi-layer fabrics with single-direction moisture guiding function through a printing or coating process, micro window channels are reserved, the micro windows can serve as channels for unidirectional moisture conduction, and other areas play a role in waterproof and antifouling, however, fluorine-containing waterproof auxiliary agents are poor in air permeability, so that the fabric is poor in air permeability, and wearing comfort is reduced. Disclosure of Invention In order to improve the air permeability of the fabric, the invention provides a single-sided waterproof single-sided water-absorbing fabric and a preparation process thereof. In a first aspect, the invention provides a preparation process of a single-sided waterproof single-sided water-absorbing fabric, which adopts the following technical scheme: a preparation process of a single-sided waterproof single-sided water-absorbing fabric comprises the following steps: S1, weaving a double-layer unidirectional moisture-conducting fabric, wherein the fabric comprises an inner layer and an outer layer, the inner layer is woven by hydrophilic-hydrophobic composite fiber yarns, and the outer layer is woven by hydrophilic moisture-conducting fiber yarns; S2, coating fluorine-free waterproof slurry on the surface of the outer layer of the fabric, wherein the fluorine-free waterproof slurry comprises the following raw materials, by weight, 20-30 parts of micro-nano composite particles, 15-25 parts of fluorine-free waterproof auxiliary agents, 40-50 parts of binders, 2-5 parts of dispersing agents and 10-20 parts of deionized water; The micro-nano composite particles are composite particles obtained by an in-situ polymerization-sol-gel composite method of nano silicon dioxide and micro titanium dioxide. By adopting the technical scheme, the inner layer adopts the hydrophilic-hydrophobic composite fiber yarn, the quick absorption and directional conduction of human sweat are realized by means of the efficient moisture absorption capacity of the hydrophilic component and the capillary channel constructed by the hydrophobic component, the hydrophilic moisture-conducting fiber is selected as the outer layer, and the fluorine-free waterproof slurry is coated on the surface o