阅读说明：本技术 一种pu光感防水透湿机能面料及其制备方法 (PU light-sensitive waterproof moisture-permeable functional fabric and preparation method thereof ) 是由 王晓梅 于 2020-07-03 设计创作，主要内容包括：本发明揭示了一种PU光感防水透湿机能面料及其制备方法,其中PU光感防水透湿机能面料,其包括底布,所述底布正面织造有仿pu花纹层,所述底布反面底层涂饰有具有透气透湿功能的水性透明PU胶层,所述底布反面面层涂饰有具有微细孔结构的微孔膜PU胶层。本发明的PU光感防水透湿机能面料及其制备方法,使面料既具有仿PU花纹,又具有防水透湿的功能。(The invention discloses a PU light sensation waterproof moisture-permeable functional fabric and a preparation method thereof, wherein the PU light sensation waterproof moisture-permeable functional fabric comprises a base fabric, a PU pattern imitating layer is woven on the front side of the base fabric, a water-based transparent PU adhesive layer with a gas and moisture permeable function is coated on the bottom layer on the back side of the base fabric, and a microporous membrane PU adhesive layer with a micropore structure is coated on the surface layer on the back side of the base fabric. The PU light sensation waterproof moisture-permeable functional fabric and the preparation method thereof enable the fabric to have the PU pattern and the waterproof moisture-permeable function.)

1. The utility model provides a PU light sense waterproof moisture permeable functional fabric which characterized in that: the PU-like pattern fabric comprises a base fabric, wherein a PU-like pattern layer is woven on the front surface of the base fabric, a water-based transparent PU adhesive layer with air and moisture permeable functions is coated on the bottom layer on the back surface of the base fabric, and a microporous membrane PU adhesive layer with a micro-hole structure is coated on the surface layer on the back surface of the base fabric.

2. A preparation method of PU light-sensitive waterproof moisture-permeable functional fabric is characterized by comprising the following steps:

designing PU-imitated patterns and weaving a base fabric, wherein the PU patterns are woven on the front surface of the base fabric;

performing waterproof and padding treatment on the base fabric;

calendering the front surface of the base fabric;

raising the back surface of the base fabric;

coating water-based transparent PU adhesive with air and moisture permeable functions on the bottom layer of the back surface of the base fabric;

and (3) coating microporous film PU adhesive with a micropore structure on the back surface layer of the base fabric in a polyurethane film lamination composite mode.

3. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein the raising treatment specifically comprises:

softening and pre-shaping the base fabric, wherein the using amount of the fluffing oil is 2.0-4.0%, and shaping is carried out at the temperature of 150 ℃;

raising base cloth, setting the height of the hair at 0.25-0.5mm, and sequentially combing and shearing;

and (3) finishing the base fabric after the shaping and the fluffing at 150 ℃, and drying and volatilizing the residual fluffing oil on the base fabric.

4. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein the specific steps of coating the water-based transparent PU adhesive comprise: the coating weight thickness is 0.02-0.05mm, and the coating is dried for 3-5 minutes in the environment of 130-150 ℃.

5. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein the specific steps of coating the microporous film PU adhesive comprise:

preparing microporous PU glue, adding an oily dyeing material, stirring uniformly, blade-coating the PU glue on the reverse side of the base fabric to form a top coating, wherein the coating weight is 1-1.8 mm;

soaking the coated microporous film PU glue in water for 25-40 seconds to form a microporous film;

naturally solidifying the base fabric after water outlet, and forming a moisture permeable microporous film on a section with an angle of 90 degrees;

and (4) shaping and drying the solidified base fabric, and evaporating residual moisture in the micropores.

6. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 5, which is characterized in that: the microporous membrane PU adhesive comprises aliphatic isocyanate ester, butanone, dimethylformamide, calcium carbonate and a microporous membrane forming regulator, wherein the using amount of the aliphatic isocyanate ester is 45-55%, the using amount of the butanone is 8-12%, the using amount of the dimethylformamide is 30%, the using amount of the calcium carbonate is 0.8-2%, and the using amount of the microporous membrane forming regulator is 4-5%.

7. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein the calendering comprises the following steps:

heating the calender to 150-180 deg.c, facing the base fabric with PU pattern to the heating surface of the calender, and calendering for 2 times;

and (3) carrying out 40 seconds of shaping process in the temperature environment of 130-150 ℃.

8. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein the waterproof and padding treatment comprises the following steps:

soaking the base fabric in prepared waterproof moisture-permeable resin at the soaking rate of 70-80%, and rolling for 5 seconds at normal temperature by a padding machine;

and (3) drying the padded base fabric in an oven at 100 ℃ for 3 minutes, and taking out.

9. The method for preparing the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, wherein after coating the microporous PU adhesive, the reverse side of the base fabric is required to be sanded, and the sanding treatment specifically comprises: preheating the sanding machine to 60-90 ℃, and continuously adjusting the processing speed according to the back effect of the base fabric, wherein the processing speed is 0-10 m/min.

10. The preparation method of the PU light sensation waterproof moisture-permeable functional fabric according to claim 2, which is characterized in that: after weaving the base fabric, it is also necessary to open, dye and finish the base fabric.

Technical Field

The invention relates to the field of textile dyeing and finishing, in particular to a PU light-sensitive waterproof moisture-permeable functional fabric and a preparation method thereof.

Background

The existing internal fabric applied finished products, including woven fabrics and warp-knitted fabrics, are dyed and then subjected to sizing finishing, and the fabric applied has the defects of no dustproof and waterproof performance, soft fabric style, insufficient stiffness and the like.

At present, the main product of the fabric for the automotive interior is to coat the back of the fabric to make the fabric stiff and elegant, but still has the defects of insufficient air and moisture permeability in user experience, poor dust prevention effect on the front of the fabric, poor capability of preventing dirt and splashing water, no air and moisture permeability and the like. For the fixed sewing in the automobile, the public praise is not good, so many customers can select the suede-like leather fabric or the PU fabric with a little higher end.

The production process of the suede-like fabric adopts superfine fiber sanding and a water system wet coating, utilizes the scraping and drying of the back of polyurethane, achieves the suede-like effect, has feasible air and moisture permeability effects but no waterproof and dustproof functions, and DMF in the polyurethane can be soaked in resin for a long time to cause harm to human health;

the designer thinks that imitative PU openly brings the puzzlement with the back mixed design, can only piece together with PU and imitative chamois leather, and seam thickness is big with density difference, and chamois leather utilizes the department not have waterproof dustproof effect, and PU face is ventilative to pass through wet effect nothing, influences the arrangement and uses experience.

Disclosure of Invention

The invention aims to provide the PU light-sensitive waterproof moisture-permeable functional fabric and the preparation method thereof aiming at the defects in the prior art, so that the fabric has both PU-imitated patterns and waterproof moisture-permeable functions.

In order to achieve the purpose, on one hand, the invention provides a PU light-sensitive waterproof moisture-permeable functional fabric which comprises a base fabric, wherein a pur-like pattern layer is woven on the front surface of the base fabric, a water-based transparent PU adhesive layer with a breathable moisture-permeable function is coated on the bottom layer on the back surface of the base fabric, and a microporous membrane PU adhesive layer with a micro-pore structure is coated on the surface layer on the back surface of the base fabric.

On the other hand, the invention provides a preparation method of PU light-sensitive waterproof moisture-permeable functional fabric, which comprises the following steps:

designing PU-imitated patterns and weaving a base fabric, wherein the PU patterns are woven on the front surface of the base fabric;

performing waterproof and padding treatment on the base fabric;

calendering the front surface of the base fabric;

raising the back surface of the base fabric;

coating water-based transparent PU adhesive with air and moisture permeable functions on the bottom layer of the back surface of the base fabric;

and (3) coating microporous film PU adhesive with a micropore structure on the back surface layer of the base fabric in a polyurethane film lamination composite mode.

Further, the raising treatment specifically includes:

softening and pre-shaping the base fabric, wherein the using amount of the fluffing oil is 2.0-4.0%, and shaping is carried out at the temperature of 150 ℃;

raising base cloth, setting the height of the hair at 0.25-0.5mm, and sequentially combing and shearing;

and (3) finishing the base fabric after the shaping and the fluffing at 150 ℃, and drying and volatilizing the residual fluffing oil on the base fabric.

Further, the concrete steps of coating the water-based transparent PU adhesive comprise: the coating weight thickness is 0.02-0.05mm, and the coating is dried for 3-5 minutes in the environment of 130-150 ℃.

Further, the specific steps of coating the microporous film PU adhesive comprise:

preparing microporous PU glue, adding an oily dyeing material, stirring uniformly, blade-coating the PU glue on the reverse side of the base fabric to form a top coating, wherein the coating weight is 1-1.8 mm;

soaking the coated microporous film PU glue in water for 25-40 seconds to form a microporous film;

naturally solidifying the base fabric after water outlet, and forming a moisture permeable microporous film on a section with an angle of 90 degrees;

and (4) shaping and drying the solidified base fabric, and evaporating residual moisture in the micropores.

Further, the microporous membrane PU adhesive comprises aliphatic isocyanate ester, butanone, dimethylformamide, calcium carbonate and a microporous membrane forming regulator, wherein the using amount of the aliphatic isocyanate ester is 45-55%, the using amount of the butanone is 8-12%, the using amount of the dimethylformamide is 30%, the using amount of the calcium carbonate is 0.8-2%, and the using amount of the microporous membrane forming regulator is 4-5%.

Further, the calendering process comprises the following specific steps:

heating the calender to 150-180 deg.c, facing the base fabric with PU pattern to the heating surface of the calender, and calendering for 2 times;

and (3) carrying out 40 seconds of shaping process in the temperature environment of 130-150 ℃.

Further, the specific steps of the waterproof and padding treatment include:

soaking the base fabric in prepared waterproof moisture-permeable resin at the soaking rate of 70-80%, and rolling for 5 seconds at normal temperature by a padding machine;

and (3) drying the padded base fabric in an oven at 100 ℃ for 3 minutes, and taking out.

Further, after the microporous film PU adhesive is coated, the reverse side of the base fabric needs to be sanded, and the sanding treatment specifically comprises the following steps: preheating the sanding machine to 60-90 ℃, and continuously adjusting the processing speed according to the back effect of the base fabric, wherein the processing speed is 0-10 m/min.

Further, after the base fabric is woven, the base fabric is subjected to fiber opening, dyeing and finishing.

Compared with the prior art, the invention has the advantages that:

according to the PU light sensation waterproof moisture permeable functional fabric, the PU pattern imitating layer is woven on the front surface of the base fabric, the water-based transparent PU adhesive is coated on the bottom layer of the back surface, and the microporous film PU adhesive is coated on the surface layer of the back surface, so that the fabric has the PU pattern imitating function, the waterproof moisture permeable function, and the physical property and the impression experience of the fabric are improved.

According to the preparation method of the PU light-sensitive waterproof moisture-permeable functional fabric, PU patterns are woven on the front surface of the base fabric, and the base fabric is subjected to waterproof and padding treatment, so that the waterproof performance of the fabric is improved; the glossiness of the front surface is improved by carrying out calendaring treatment on the front surface of the base fabric; the back surface of the base fabric is fluffed, so that the problems of thin paths and reverse fluff defects are effectively solved; the water-based transparent PU adhesive with the air and moisture permeable functions is coated on the bottom layer on the back surface of the base fabric, so that the water splashing prevention performance and the water pressure resistance performance of the fabric are enhanced, and the fabric has the air and moisture permeable performance; the microporous PU adhesive with a micropore structure is coated on the back surface layer of the base fabric in a polyurethane film lamination composite mode, so that the air permeability and moisture permeability of the fabric are improved, harmful gas is separated out, the odor of the fabric substrate is reduced, toxic gas is degraded, and the health index of customers is increased.

Drawings

Fig. 1 is a schematic structural view of a PU light-sensitive waterproof moisture-permeable functional fabric of the present invention.

Detailed Description

The present invention will be described in further non-limiting detail with reference to the following preferred embodiments and accompanying drawings.

As shown in fig. 1, the PU light sensation waterproof moisture-permeable functional fabric corresponding to a preferred embodiment of the invention comprises a base fabric 1, wherein a PU-like pattern layer 2 is woven on the front surface of the base fabric 1, a water-based transparent PU glue layer 3 with a breathable moisture-permeable function is coated on the bottom layer on the back surface of the base fabric 1, and a microporous membrane PU glue layer 4 with a microporous structure is coated on the surface layer on the back surface of the base fabric 1.

The preparation method of the PU light-sensitive waterproof moisture-permeable functional fabric comprises the following steps:

designing PU (polyurethane) pattern and weaving base fabric:

the specific steps of designing the patterns comprise:

a designer designs the PU-imitated patterns according to requirements, the stereoscopic impression and the circulating structure of the patterns need to be combined with the reference of finished products after multiple projects in the later period, and the density of the patterns or the fabric or the yarn count is repeatedly tested and modified to achieve the expected effect of the finished products.

The specific steps of weaving the base fabric include:

a designer converts the pattern graph into an organizational chart and guides the organizational chart into a sample jacquard;

selecting yarns according to the fabric tissue density and the using length, wherein the thickness of the yarns is adjusted according to later-stage finished product tests and is not more than 1.0dtex at most; in the embodiment, the base fabric is made of superfine polyester fibers, and the selection range of the polyester fiber yarns is between 0.5 and 1.0 dtex;

warping the yarn, rewinding, carrying out warp splicing by a pattern drawing machine, passing through the ends and finishing; winding a certain number of yarns on a weaving shaft in parallel according to the specified length and width, and connecting the yarn head on the weaving shaft with the warp on a jacquard machine;

selecting weft according to an organization chart imported by a designer, weaving base cloth, and testing and adjusting the fabric organization density at any time;

and (5) cutting and removing the shaft after weaving.

If the fabric is woven by the selected white yarns, dyeing process preparation is required according to requirements; if the original yarn with the expected color is selected for weaving, dyeing is not needed, but oil removal treatment is needed by using a dye vat, so that the condition that the resin is not attached after being infiltrated is prevented, and the burning risk of the product is reduced. The specific method for deoiling treatment comprises the following steps: the bath ratio is 1: 30. the temperature is 75 ℃ for 30 minutes.

Performing fiber opening treatment on the base fabric:

adding a fiber opening agent with the mass concentration of 2g/l into the dye liquor, heating to 95 ℃ under an alkaline condition (adding sodium hydroxide with the mass concentration of 5 g/l), and carrying out heat preservation treatment for 40 minutes to complete base fabric opening, wherein the fiber opening rate is controlled to be 10-15%;

and (3) washing the base fabric in hot water for 3 times to ensure that the base fabric has no impurity residue and ensure the quality of later engineering, and adding acetic acid with the mass concentration of 0.5g/l for acid-base neutralization to ensure that the base fabric is discharged from the vat in weak acidity during the second washing in hot water.

Dyeing and finishing the base fabric:

selecting a dye auxiliary agent and a dye with high light resistance and high rubbing fastness which meet the requirements of the physical properties of the interior trim of the automobile according to the required targets. 1.0-2.0% of light fastness agent and 4.0-7.0% of flame retardant agent are added into the dye auxiliary agent. 2 nozzles are needed during dyeing, the diameter of the large nozzle is 7-9cm, the diameter of the small nozzle is 6-7cm, and the pressure of the nozzles is 0.1-0.2KPa at normal temperature; 0.3-0.4KPa at 130 deg.C, and 0.3KPa at 130 deg.C.

Because the superfine polyester fiber is colored slowly and the color is light and unstable, a specific dyeing process is needed, and the specific steps are as follows:

adding the fabric, the dye auxiliary agent and the dye into a dye vat at normal temperature, heating to 30 ℃, then starting to heat to 90 ℃ at the speed of 1 ℃/min, then heating to 135 ℃ at the speed of 0.5 ℃/min, and preserving heat for 30 minutes at the temperature of 135 ℃. Aiming at an extra-black system, the dye is saturated, the color depth cannot be reached, the heat preservation time can be prolonged, and a deepening agent is added to ensure the uniformity of the color. Since the color of the post-calendering will be lighter, the dyeing formula is adjusted to the finished product by multiple tests.

3 times of finishing treatment is needed after dyeing:

adding sodium hydroxide with the mass concentration of 2.0g/l in the first time, adding sodium hydrosulfite with the mass concentration of 2.0g/l, and adding sodium hydrosulfite with the bath ratio of 1: 30, keeping the temperature at 80 ℃ for 30 minutes;

secondly, adding sodium hydroxide with the mass concentration of 0.6g/l, adding sodium hydrosulfite with the mass concentration of 1g/l, and adding sodium hydrosulfite at the bath ratio of 1: preserving the heat for 30 minutes at the temperature of 30 and 80 ℃; in the step, 2 times of rinsing is needed, and strong base bottom cloth is cleaned;

adding acetic acid again, wherein the mass concentration is 0.5g/l, and the bath ratio is 1: keeping the temperature at 30 and 75 ℃ for 15 minutes, and taking the base fabric out of the cylinder in a weak acid state.

After the 3 times of finishing treatment, the concentration of the dyed product can reach the standard, and meanwhile, the rubbing fastness of the finished product reaches 3.5-4 grade, and the light fastness reaches 3.5-4 grade. After finishing treatment, the fabric is dehydrated and shaped, and is dried for 40 seconds at the temperature of 150 ℃.

Performing waterproof and padding treatment on the base fabric:

firstly, testing the pH value of the base fabric to be between 5 and 6.5;

the preparation method comprises the following steps of preparing waterproof moisture-permeable resin, wherein the waterproof moisture-permeable resin comprises super water-permeable resin, antifouling water, a breathable moisture-permeable finishing agent and a color fixing agent, and the proportion is as follows: the dosage of the super water-blown resin is 3.0-6.0%, the dosage of the antifouling water-blown resin is 0.2-0.5%, the dosage of the ventilating and moisture-permeable finishing agent is 0.1-0.2%, the dosage of the color fixing agent is 0.6-1.5%, and the concentration parameter of the resin can be adjusted at any time according to the waterproof physical performance test;

soaking the base fabric in waterproof moisture-permeable resin at the soaking rate of 70-80%, and rolling for 5 seconds at normal temperature by a padding machine;

and (3) drying the padded base fabric in an oven at 100 ℃ for 3 minutes, and taking out.

And (3) calendering the front surface of the base fabric:

the temperature of the calender is raised to 150-180 ℃, the surface of the base fabric with the PU-imitated patterns faces the heating surface of the calender, the pattern surface is subjected to hot rolling and pressing, the calender is calendered for 2 times, and the temperature of the calender is adjusted according to the glossiness of the base fabric compared with PU. The calender smooth roll is required to be clean and free of impurities, shows smooth and free of pits, and ensures that the fabric is free of dirt and defects after high-temperature calendering;

and (3) carrying out 40-second setting process in the temperature environment of 130-150 ℃, confirming that the density is between 75 and 85 after the base fabric is pulled open according to the needle pitch and the base fabric pattern requirements, and adjusting setting parameters in time.

At the moment, the front surface of the base fabric has PU-imitated patterns and luster, the waterproof and moisture permeable performance and the waterproof and water-repellent performance test reach 4 grades and above, the pattern surface is water-repellent, the surface is not wet and permeable, and water drops slide along the fabric. If the product is used on the automobile interior, coffee beverage and the like are splashed and cleaned in time, so that the trouble of peculiar smell, cleaning trouble and the like caused by the suction of the fabric can be avoided. The pattern surface after strong calendering is not easy to be stained with foreign matters and to cause flying dust to embed, and the padding of the water system water-repellent resin does not influence the original moisture permeability and air permeability of the base fabric.

Fluffing the back surface of the base fabric:

softening and pre-shaping the base fabric, wherein the using amount of the fluffing oil is 2.0-4.0%, and shaping is carried out at the temperature of 150 ℃;

the base cloth is fluffed, the height of the fluff is set to be 0.25-0.5mm, the carding and the shearing are performed in sequence, so that the back surface of the base cloth is uniformly coated, and the front surface is subjected to decrement treatment, thereby effectively solving the problems of thin paths and reverse fluff defects;

and (3) shaping and fluffing the base fabric: the base fabric is finished at the temperature of 150 ℃, the base fabric is dried and volatilized by residual crude oil, so that the base fabric cannot be attached firmly when polyurethane is coated and scraped at the later stage, the physical performance of the product is improved, the low-temperature and normal-temperature buckling reaches the standard, and the physical test of the product in combustion meets the requirements of various main factories.

Coating the bottom layer on the back surface of the base fabric with water-based transparent PU adhesive with air and moisture permeable functions:

the coating weight thickness is 0.02-0.05mm, and the fabric is dried for 3-5 minutes in the environment of 130-150 ℃, so that the water-proof and water pressure-resistant performance of the fabric is enhanced, and the fabric has the advantages of air permeability and moisture permeability.

Coating a microporous film PU adhesive with a micropore structure on the back surface layer of the base fabric in a polyurethane film lamination composite mode:

preparing microporous membrane PU glue, wherein the microporous membrane PU glue contains aliphatic isocyanate ester, butanone, Dimethylformamide (DMF), calcium carbonate and a microporous membrane forming regulator (polyoxyethylene ether), and the proportion is as follows: 45-55% of aliphatic isocyanate ester, 8-12% of butanone, 30% of DMF, 0.8-2% of calcium carbonate and 4-5% of microporous film forming regulator.

Adding an oily dyeing material, selecting a pigment with a proper formula according to a target color, modulating the pigment according to a ratio, adding the pigment into the microporous membrane PU glue, uniformly stirring, blade-coating the pigment on the reverse side of the base fabric to form a top coating, wherein the coating weight is 1-1.8 mm;

and soaking the coated microporous membrane PU glue in water for 25-40 seconds to ensure that DMF (dimethyl formamide) in the solvent in the microporous membrane PU glue is soaked in the water to generate displacement diffusion, and then the water diffuses to the coating surface and permeates into a DMF dissolution path to form a microporous membrane. DMF is dissolved out on the coating surface, and the finished product has no DMF volatile smell, and is healthy and environment-friendly;

naturally solidifying the base fabric after water outlet, and forming a moisture permeable microporous film on a section with an angle of 90 degrees; and (3) setting and drying the solidified base fabric, wherein a 5-section temperature stage type setting machine is adopted, the temperature is 150-170 ℃, the whole length is dried for 3 minutes, and the drying can also evaporate the residual water in the micropores to leave micro pores, so that the air permeability of the product is ensured. The solubility and the temperature of the PU solvent have great influence on the membrane performance, and the proportion of the PU adhesive for preparing the microporous membrane, the solvent, the additive, the solvent volatilization time, the temperature, the humidity, the gel condition, the thickness and the area of a formed membrane are related; the moisture permeability is increased along with the temperature rise, and the moisture permeability is the lowest at the temperature of 11 ℃; the humidity is high, the solvent is slowly volatilized, the pore diameter of the micropores is small, and otherwise, the pore diameter is enlarged.

The finished base fabric has the hydrostatic pressure resistance of not less than 1.67Kpa and the moisture permeability of 2500 g/(m)²24h), the diameter of the microporous membrane reaches 10-50um, thus being larger than 4 x 10 of the diameter of the water vapor^-4um, therefore, water vapor can permeate the microporous membrane and has air permeability and moisture permeability. Compare traditional PU membrane and nonporous membrane, this application can pass through wet ventilative, promotes use comfort.

The formula and the pigment are required to be repeatedly tested and adjusted in the above steps, the front side and the back side of the color of the finished product are required to be adjusted to be consistent with the target color, the front side and the back side of the finished product can be designed and used in the vehicle interior decoration according to the initial physical property test and parameter adjustment, and a designer has no color difference and appearance and performance similar to those of natural leather.

The reverse side of the base fabric is sanded, so that the product has the grain surface of natural leather, and the appearance and the internal structure of the product are closer to those of the natural leather:

preheating the sanding machine to 60-90 ℃, wherein the processing speed is 0-10m/min, and parameters can be adjusted according to requirements.

The carbon brush is used for sanding, the traditional sand paper is avoided, and the sand paper particles are embedded into the base cloth, so that the poor mesh surface is caused, and the superfine fiber is crystallized.

The reverse side effect of the base fabric is observed while polishing, the processing speed is adjusted, the condition that the friction is accelerated due to the over-high speed is prevented, the temperature is increased, and the fibers are fused. Meanwhile, polyurethane can generate cracks, the hand feeling is hard, and the visual effect is poor, so that the processing speed needs to be adjusted in time.

The fabric prepared by the preparation method has the following physical property detection results:

according to the test data, the fabric disclosed by the invention has the PU light sensation and patterns and the waterproof and moisture permeable functions, the front and back of the whole fabric are close to natural PU, the physical property results of the product reach the standard, the fabric has no irritation to skin, is healthy and environment-friendly, and the protection and elasticity of the automotive interior substrate are enhanced while the comfort is kept.

When the PU light-sensation waterproof moisture-permeable functional fabric is used specifically, the PU light-sensation waterproof moisture-permeable functional fabric can be prepared by omitting the process in the preparation process according to different physical properties or requirements of specification of the front surface and the back surface and the like, so that the optimization can greatly save energy and time and increase great economic benefit space. Several examples of different requirements are given below.