阅读说明：本技术 一种防水透湿水性聚氨酯环保涂层帐篷织物 (Waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric ) 是由 许尔明 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种防水透湿水性聚氨酯环保涂层帐篷织物,基胚经过退浆染色定型之后,采用多次重复涂层的方式,其中涂层整理步骤如下：(1)聚醚多元醇PU第一次底涂；(2)聚醚多元醇PU第二次底涂；(3)聚醚多元醇PU面涂,选用固含量50%左右的亲水性聚氨酯树脂,100份亲水性聚氨酯树脂中添加3份密胺架桥机、2份密胺促进剂和6份耐磨滑爽剂,涂层厚度控制在30-35μm,每平米用胶量控制在100-105g/㎡。在涂层整理过程中,选用亲水性聚醚多元醇聚氨酯作为底胶和面胶,其上的亲水基团可作为桥梁,使水分子依靠氢键或者其他作用力沿着亲水基团按“吸附-扩散-解吸附”的顺序从高湿度侧传递到低湿度侧,具有优异的透湿透气性。(The invention relates to a waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric, wherein a base blank is desized, dyed and shaped, and then is coated repeatedly for many times, wherein the coating finishing steps are as follows: (1) polyether polyol PU is subjected to primary priming; (2) polyether polyol PU is subjected to second priming; (3) the polyether polyol PU surface coating is prepared by selecting hydrophilic polyurethane resin with the solid content of about 50 percent, adding 3 parts of melamine bridging machine, 2 parts of melamine accelerator and 6 parts of wear-resistant smoothing agent into 100 parts of hydrophilic polyurethane resin, controlling the thickness of the coating to be 30-35 mu m, and controlling the glue consumption per square meter to be 100 plus 105 g/square meter. In the coating finishing process, the hydrophilic polyether polyol polyurethane is selected as primer and surface adhesive, hydrophilic groups on the primer and the surface adhesive can be used as bridges, so that water molecules are transferred from the high-humidity side to the low-humidity side along the hydrophilic groups according to the sequence of adsorption-diffusion-desorption by virtue of hydrogen bonds or other acting forces, and the coating has excellent moisture permeability and air permeability.)

1. The waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric is characterized in that after a base blank is desized, dyed and shaped, a mode of repeatedly coating is adopted, wherein the coating finishing steps are as follows:

(1) polyether polyol PU is subjected to primary priming coating, a powdery ultraviolet screening agent, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 25-30 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter;

(2) polyether polyol PU is subjected to primary coating for the second time, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 20-25 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter;

(3) the polyether polyol PU surface coating is prepared by selecting hydrophilic polyurethane resin with the solid content of about 50 percent, adding 3 parts of melamine bridging machine, 2 parts of melamine accelerator and 6 parts of wear-resistant smoothing agent into 100 parts of hydrophilic polyurethane resin, controlling the thickness of the coating to be 30-35 mu m, and controlling the glue consumption per square meter to be 100 plus 105 g/square meter.

2. The waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric as claimed in claim 1, wherein the base fabric is polyester filament plain cloth, the warp and weft yarn specifications are 75D/36F, and the warp and weft density is higher than 192 pieces/foot, and the fabric is subjected to end sewing treatment.

3. The waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric as claimed in claim 1, wherein the base fabric is subjected to sizing and waterproofing after desizing and dyeing, the temperature of the oven of the sizing machine is set at 210 ℃, the retention time of the oven is 30 seconds, and meanwhile, a fluorocarbon waterproofing agent CPS-L38G/L is added, and the detection of the water-staining effect after waterproofing can reach more than 5 grades.

4. The waterproof and moisture-permeable waterborne polyurethane environment-friendly coating tent fabric according to claim 1, 2 or 3, characterized in that calendering finishing is performed after sizing, flattening is performed by using a mirror roller, the surface temperature of the mirror roller is controlled to be about 200 ℃, the nip pressure is controlled to be 130kg/cm, and the calendering traveling speed of the mirror roller is controlled to be 50 m/min.

5. The tent fabric with the waterproof and moisture-permeable waterborne polyurethane environment-friendly coating as claimed in claim 1, wherein when the polyether polyol PU is first primed, 0.3-0.7 part of powdery ultraviolet screening agent, 5 parts of melamine bridging agent and 2 parts of melamine accelerator are added to 100 parts of hydrophilic polyether polyol polyurethane resin.

6. The tent fabric with the waterproof and moisture-permeable waterborne polyurethane environment-friendly coating as claimed in claim 1, wherein 6 parts of melamine bridging agent and 3 parts of melamine accelerator are added to 100 parts of hydrophilic polyether polyol polyurethane resin when polyether polyol PU is subjected to second priming.

Technical Field

The invention relates to a tent fabric, in particular to a waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric.

Background

Along with the improvement of the urbanization degree of the modern society and the emphasis of people on health; outdoor sports gradually become the first sport mode of most people on weekends and holidays, and tents also become the mainstream of outdoor sports equipment.

The tent is a shed which is supported on the ground to shield wind, rain and sunlight and is used for temporary living. The multifunctional canvas is made of multifunctional canvas and can be detached and transferred at any time together with supporting objects. The mass of the tent is thus represented by the tent fabric and the framework for support.

The research on the water resistance and moisture permeability of tent fabrics is very popular abroad, although related researches are carried out by existing enterprises in China, PVC coatings are used mostly, and although the waterproof performance is good, the moisture permeability is poor and the low temperature resistance is low.

Disclosure of Invention

The invention provides a waterproof moisture-permeable waterborne polyurethane environmental-friendly coating tent fabric, which selects hydrophilic polyether polyol polyurethane as a primer and a surface adhesive, wherein hydrophilic groups on the hydrophilic polyether polyol polyurethane can be used as bridges, so that water molecules are transferred from a high-humidity side to a low-humidity side along the hydrophilic groups according to the sequence of adsorption-diffusion-desorption by virtue of hydrogen bonds or other acting forces, and the tent fabric has excellent moisture permeability and air permeability; the water-based polyurethane resin is repeatedly coated for three times, and the waterproof performance (hydrostatic pressure index) of the cloth cover can reach more than 30 kPa.

The specific technical scheme of the invention is as follows: a waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric adopts a mode of repeatedly coating for many times after a base blank is desized, dyed and shaped, wherein the coating finishing steps are as follows:

(1) polyether polyol PU is subjected to primary priming coating, a powdery ultraviolet screening agent, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 25-30 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter;

(2) polyether polyol PU is subjected to primary coating for the second time, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 20-25 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter;

(3) the polyether polyol PU surface coating is prepared by selecting hydrophilic polyurethane resin with the solid content of about 50 percent, adding 3 parts of melamine bridging machine, 2 parts of melamine accelerator and 6 parts of wear-resistant smoothing agent into 100 parts of hydrophilic polyurethane resin, controlling the thickness of the coating to be 30-35 mu m, and controlling the glue consumption per square meter to be 100 plus 105 g/square meter.

In the coating finishing process, hydrophilic polyether polyol polyurethane is selected as primer and surface adhesive, hydrophilic groups on the primer and the surface adhesive can be used as bridges, water molecules are transferred from a high-humidity side to a low-humidity side along the hydrophilic groups according to the sequence of adsorption-diffusion-desorption by virtue of hydrogen bonds or other acting forces, the moisture permeability is excellent, and the moisture permeability is as high as 2000g/(m2 & 24 h). Through the repeated coating of the waterborne polyurethane resin for three times, the waterproof performance (hydrostatic pressure index) of the cloth cover can reach more than 30kPa, the waterproof performance is obviously improved, and the problem that the waterproof performance of the tent fabric is reduced after being folded in the using process can be effectively solved. The hydrophilic polyether polyol polyurethane is selected, water is used for replacing an organic solvent, the hydrophilic polyether polyol polyurethane can react with various groups, the mixing degree with other various water-based resins is good, the performance can be improved by mixing with other resins, the production cost is reduced, and the non-toxic, pollution-free, energy-saving and emission-reducing green production is realized.

Preferably, the base fabric is made of polyester filament plain cloth, the warp and weft yarn specifications are 75D/36F, the warp and weft density is more than 192 pieces/foot, and the fabric is subjected to end sewing treatment.

Preferably, the base blank is subjected to desizing and dyeing and then is subjected to shaping and waterproof treatment, the temperature of an oven of the shaping machine is set to 210 ℃, the retention time of the oven is 30 seconds, a fluorocarbon waterproofing agent CPS-L38G/L is added, and the water wetting effect detection after the waterproof treatment can reach more than 5 grades.

Further preferably, calendering finishing is carried out after shaping, flattening is carried out by adopting a mirror roller, the surface temperature of the mirror roller is controlled to be about 200 ℃, and the rolling point pressure is controlled to be 130kg/cm²The calendering running speed of the mirror roller is controlled to be 50 m/min. Through calendaring finish, the fabric tissue is tighter, and the glossiness of the coating surface is improved.

More preferably, when the polyether polyol PU is used for primary priming, 0.3-0.7 part of powdery ultraviolet screening agent, 5 parts of melamine bridging agent and 2 parts of melamine accelerator are added into 100 parts of hydrophilic polyether polyol polyurethane resin. The hydrophilic polyether polyol polyurethane resin is used for the base coat, so that the fabric has the best moisture permeability, and the bonding fastness with the base blank is the best. When the addition amount of the powdery ultraviolet screening agent is controlled to be 3-7%, the powdery ultraviolet screening agent is easy to dissolve and disperse and does not influence the ultraviolet resistance. After the powdery ultraviolet screening agent is added, the transmissivity of the bottom coating is greater than that of the top coating, and meanwhile, ultraviolet rays are reflected and refracted when passing through the connecting surface of the coating, so that more ultraviolet rays are prevented from reaching the printing paste layer, excessive ultraviolet rays are prevented from contacting the color-changing printing paste in single use by a physical method, and the service life of the waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric is greatly prolonged.

More preferably, when the polyether polyol PU is used for the second primer coating, 6 parts of melamine bridging agent and 3 parts of melamine accelerator are added to 100 parts of hydrophilic polyether polyol polyurethane resin.

The invention has the beneficial effects that: in the coating finishing process, the hydrophilic polyether polyol polyurethane is selected as primer and surface adhesive, hydrophilic groups on the primer and the surface adhesive can be used as bridges, so that water molecules are transferred from the high-humidity side to the low-humidity side along the hydrophilic groups according to the sequence of adsorption-diffusion-desorption by virtue of hydrogen bonds or other acting forces, and the coating has excellent moisture permeability and air permeability.

Detailed Description

The invention is further described below by means of specific examples.

Example (b):

a waterproof moisture-permeable waterborne polyurethane environment-friendly coating tent fabric is prepared by the following steps:

firstly, preparing a base embryo:

selecting polyester filament plain cloth, wherein the specification of warp and weft yarns is 75D/36F, and the density of the warp and weft yarns is more than 192 yarns/foot, and performing end sewing treatment on the gray cloth.

Secondly, desizing and dyeing:

and (3) putting the joined base blank into an overflow dyeing machine for desizing and dyeing, and carrying out reduction cleaning after color matching, wherein the color fastness is more than grade 4.

Thirdly, sizing and waterproofing:

the base blank is subjected to desizing and dyeing, then is subjected to shaping and waterproof treatment, the temperature of an oven of a shaping machine is set to 210 ℃, the retention time of the oven is 30 seconds, and meanwhile, a fluorocarbon waterproofing agent CPS-L38G/L is added, so that the water staining effect detection after waterproof treatment can reach more than 5 grades.

Fourthly, press finishing:

performing calendaring finishing after shaping, flattening by adopting a mirror roller, controlling the surface temperature of the mirror roller to be about 200 ℃, and controlling the pressure of a rolling point to be 130kg/cm²The calendering running speed of the mirror roller is controlled to be 50 m/min.

Fifthly, coating finishing:

(1) polyether polyol PU is subjected to primary priming coating, a powdery ultraviolet screening agent, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 25-30 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter; adding 0.3 part of powdery ultraviolet screening agent, 5 parts of melamine bridging agent and 2 parts of melamine accelerator into 100 parts of hydrophilic polyether polyol polyurethane resin;

(2) polyether polyol PU is subjected to primary coating for the second time, a melamine bridging agent and a melamine accelerator are added into hydrophilic polyether polyol polyurethane resin, the thickness of the coating is controlled to be 20-25 mu m, and the glue consumption per square meter is controlled to be 95-100 g/square meter; adding 6 parts of melamine bridging agent and 3 parts of melamine accelerator into 100 parts of hydrophilic polyether polyol polyurethane resin;

(3) the polyether polyol PU surface coating is prepared by selecting hydrophilic polyurethane resin with the solid content of about 50 percent, adding 3 parts of melamine bridging machine, 2 parts of melamine accelerator and 6 parts of wear-resistant smoothing agent into 100 parts of hydrophilic polyurethane resin, controlling the thickness of the coating to be 30-35 mu m, and controlling the glue consumption per square meter to be 100 plus 105 g/square meter.

The tent fabric prepared by the process has the following technical indexes:

the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.