阅读说明：本技术 一种原液着色耐氯漂手术衣面料的制备方法 (Preparation method of stock solution coloring chlorine-bleaching-resistant surgical gown fabric ) 是由 杨娜 汤龙世 刘衍华 于 2021-08-14 设计创作，主要内容包括：本发明提供一种原液着色耐氯漂手术衣面料的制备方法,包括面料的选材、改性PTFE膜的制备、纤维布与改性PTFE膜胶粘复合,其中改性PTFE膜的制备包括浸渍液的制备和紫外光处理。所制备面料,抗渗水静水压178～192cmH-(2)O,聚酯纤维布层与PTFE膜剥离强力14.9～16.6N,透湿率5703～6100g/m～(2)·d；面料经高温氯漂洗涤50次后,抗渗水静水压107～133cmH-(2)O,聚酯纤维布层与PTFE膜剥离强力8.1～10.9N,透湿率3576～4812g/m～(2)·d,耐洗涤色牢度4～5级。(The invention provides a preparation method of a stock solution coloring chlorine bleaching resistant operating coat fabric, which comprises the steps of fabric material selection, modified PTFE membrane preparation, fiber cloth and modified PTFE membrane gluing and compounding, wherein the modified PTFE membrane preparation comprises impregnation solution preparation and ultraviolet light treatment. The prepared fabric has water seepage resistance and hydrostatic pressure of 178-192 cmH 2 O, the peeling strength between the polyester fiber cloth layer and the PTFE film is 14.9 to 16.6N, and the moisture permeability is 5703 to 6100g/m 2 D; after the fabric is washed for 50 times by high-temperature chlorine bleaching, the water seepage resistant hydrostatic pressure is 107-133 cmH 2 O, the peeling strength between the polyester fiber cloth layer and the PTFE film is 8.1 to 10.9N, and the moisture permeability is 3576 to 4812g/m 2 D, washing fastness is 4-5 grades.)

1. A preparation method of a stock solution coloring chlorine-bleaching-resistant surgical gown fabric is characterized by comprising the following steps: the method comprises the steps of selecting materials of fabrics, preparing a modified PTFE membrane, and gluing and compounding fiber cloth and the modified PTFE membrane; the preparation of the modified PTFE membrane comprises the preparation of an impregnation liquid and ultraviolet light treatment.

2. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 1, characterized in that: the material selection of the fabric comprises an upper layer, a middle layer and a lower layer; the upper layer is composed of three yarns of a first warp, a second warp and a weft, the middle layer is a modified PTFE film, and the lower layer is polyester filament weft-knitted fabric.

3. The preparation method of the stoste-colored chlorine-bleaching-resistant surgical gown fabric according to claim 2, characterized in that: the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net; the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive yarn, the twisting direction is Z twisting, and the twist is 450 twisting/m; the weft yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net; the gram weight of the modified PTFE membrane is 18-20 g/m²The thermal stability is 190-210 ℃, the thickness is 48-50 um, the hydrostatic pressure is 200-220 KPa, and the moisture permeability is 6850-7000 g/m²D; the polyester filament weft-knitted fabric is DTY 50D/36F weft plain stitch, and the gram weight is 65g/m²。

4. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 1, characterized in that: the preparation of the impregnation liquid comprises the preparation of a pre-dispersed nano titanium dioxide aqueous solution and the preparation of a hydrogen peroxide-ionic liquid mixed solution to prepare the impregnation liquid.

5. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 4, characterized in that: preparing the pre-dispersed nano titanium dioxide aqueous solution, slowly adding nano titanium dioxide powder into water containing fatty amine polyoxyethylene ether at a stirring speed of 6000-10000 r/min, stirring for 10 minutes after the addition is finished, and performing ultrasonic dispersion for 20-40 minutes to obtain the pre-dispersed nano titanium dioxide aqueous solution; the nano titanium dioxide powder is rutile hydrophilic powder, the particle size distribution is 10-30 nm, and the purity is 99%; the mass concentration of the titanium dioxide in the pre-dispersed nano titanium dioxide aqueous solution is 25%, and the mass content of the fatty amine polyoxyethylene ether is 0.5-1%.

6. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 4, characterized in that: preparing a hydrogen peroxide-ionic liquid mixed solution, namely mixing 1-butyl-3-methylimidazole trifluoromethane sulfate and 1-butyl-3-methylimidazole p-methylbenzene sulfonate according to the mass ratio of 1:1, adding hydrogen peroxide with the mass concentration of 50%, and stirring and mixing to obtain the hydrogen peroxide-ionic liquid mixed solution with the mass concentration of 15-25% of hydrogen peroxide; the impregnation liquid is prepared by mixing a pre-dispersed nano titanium dioxide aqueous solution and a hydrogen peroxide-ionic liquid mixed solution according to a mass ratio of 1:1, strongly stirring at a speed of 6000-10000 rpm for 20-40 minutes, and ultrasonically dispersing for 35 minutes.

7. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 1, characterized in that: the ultraviolet light treatment is to dip the deoiled and cleaned PTFE membrane into the impregnation liquid, take out the PTFE membrane after the ultraviolet light irradiation for 1 to 2.5 hours, repeatedly wash the PTFE membrane by deionized water and dry the PTFE membrane at 80 ℃ to obtain a modified PTFE membrane; and ultraviolet light irradiation is carried out, an ultraviolet high-pressure mercury lamp is selected, the power is 500W, the wavelength is 365nm, and the distance between a light source and the PTFE film is fixed to be 10 cm.

8. The method for preparing the dope-dyed chlorine-bleaching-resistant surgical gown fabric according to claim 1, characterized in that: the fiber cloth is glued and compounded with the modified PTFE film, liquid hot melt adhesive is uniformly coated on the upper surface and the lower surface of the modified PTFE film, and after the upper layer fabric and the lower layer fabric are adhered, hot-pressing and compounding are carried out to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and the model is AP-J7738 universal type; of the uniformly coated, modified PTFE filmThe glue amount of the upper surface and the lower surface is consistent, and the total glue amount is controlled to be 11-17 g/m²(ii) a And hot-pressing compounding, wherein the hot-pressing temperature is 110-150 ℃, and the hot-pressing time is 15-30 minutes.

Technical Field

The invention relates to a preparation method of a stock solution coloring chlorine-bleaching-resistant operating coat fabric, belonging to the technical field of medical textile materials.

Background

The operating coat can be used repeatedly, and the requirements on the fabric are extremely strict. The most important key is that the barrier property under dry and wet states is excellent, and the penetration of liquid, various microorganisms and particulate matters can be effectively blocked. In special operation occasions, such as exposure of a large amount of liquid, high spraying and sputtering risks, high pressure on an operating coat, certain adsorption function and water pressure resistance. The repeated use also puts high requirements on the aspects of fabric strength and toughness, detergent resistance and sterilization and disinfection resistance. The single material is difficult to meet the requirements, and the current multilayer composite fabric based on the special functional film has the most development prospect, wherein the PTFE microporous membrane is compounded with two layers of polyester filament fiber cloth to achieve the most excellent comprehensive performance. However, the surface wettability of the PTFE film is poor, the composite material has the problems of low peeling strength and poor repeated washing resistance after being compounded with polyester fiber cloth adhesive, and although the peeling strength can be improved by increasing the amount of the adhesive, the moisture permeability of the fabric can be greatly reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a preparation method of a stock solution coloring chlorine bleaching resistant surgical gown fabric, which realizes the following purposes:

the peeling strength of the polyester fiber cloth layer and the PTFE film is improved;

the washing fastness of the fabric is improved.

In order to realize the purpose, the invention adopts the following technical scheme:

a preparation method of a stock solution coloring chlorine-bleaching-resistant surgical gown fabric is characterized by comprising the following steps: the method comprises the steps of selecting materials of fabrics, preparing a modified PTFE membrane, and gluing and compounding fiber cloth and the modified PTFE membrane; the preparation of the modified PTFE membrane comprises the preparation of an impregnation liquid and ultraviolet light treatment.

The following is a further improvement of the above technical solution:

selecting materials for the fabrics in the step (1)

And (3) upper layer: the warp knitting machine consists of three yarns, namely a first warp, a second warp and a weft, wherein the first warp in the radial direction is closely arranged in parallel, the second warp parallel to the first warp is inserted into the weft every 10 mm of width, and two wefts are woven every 0.8 mm in the radial direction;

the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net;

the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive filament, and the twisting direction is as follows: z twist, twist: 450 twists per meter;

the weft yarn is a green dope-dyed polyester filament yarn DTY 75D/72F semi-gloss light net.

An intermediate layer: the gram weight of the modified PTFE membrane is 18-20 g/m²The thermal stability is 190-210 ℃, the thickness is 48-50 um, the hydrostatic pressure is 200-220 KPa, and the moisture permeability is 6850-7000 g/m²·d。

The lower layer is polyester filament weft-knitted fabric;

the knitted fabric is DTY 50D/36F weft plain stitch;

the gram weight of the knitted fabric is 65g/m²。

Step (2) preparation of modified PTFE film

1. Preparation of the impregnation liquid:

1) preparation of pre-dispersed nano titanium dioxide aqueous solution

Adding fatty amine polyoxyethylene ether into water, stirring and dissolving, slowly adding nano titanium dioxide powder at a stirring speed of 6000-10000 r/min, stirring for 10 minutes after the addition is finished, stopping stirring, and then performing ultrasonic dispersion for 20-40 minutes to obtain a pre-dispersed nano titanium dioxide aqueous solution;

the nano titanium dioxide powder is rutile hydrophilic powder, the particle size distribution is 10-30 nm, and the purity is 99%;

the mass concentration of the titanium dioxide in the pre-dispersed nano titanium dioxide aqueous solution is 25%, and the mass content of the fatty amine polyoxyethylene ether is 0.5-1%.

2) Preparation of hydrogen peroxide-ionic liquid mixed liquor

Mixing 1-butyl-3-methylimidazole trifluoromethane sulfate and 1-butyl-3-methylimidazole p-methylbenzene sulfonate according to the mass ratio of 1:1, adding hydrogen peroxide, stirring and mixing to obtain a mixed solution with the mass concentration of hydrogen peroxide of 15-25%;

the mass concentration of the hydrogen peroxide in the hydrogen peroxide is 50%.

3) To prepare the impregnation liquid

Mixing the pre-dispersed nano titanium dioxide aqueous solution and the hydrogen peroxide-ionic liquid mixed solution according to the mass ratio of 1:1, strongly stirring at the speed of 6000-10000 r/min for 20-40 minutes, and ultrasonically dispersing for 35 minutes to enable the solution to reach a clear and transparent state, thereby obtaining the impregnation liquid.

2. Ultraviolet light treatment

Soaking a pre-deoiled and cleaned PTFE membrane into the impregnation liquid, irradiating the PTFE membrane for 1 to 2.5 hours by using ultraviolet light, taking out the PTFE membrane, repeatedly washing the PTFE membrane by using deionized water, and drying the PTFE membrane at 80 ℃ to obtain a modified PTFE membrane;

and ultraviolet light irradiation is carried out, an ultraviolet high-pressure mercury lamp is selected, the power is 500W, the wavelength is 365nm, and the distance between a light source and the PTFE film is fixed to be 10 cm.

And (3) gluing and compounding the fiber cloth and the modified PTFE membrane:

uniformly coating the upper surface and the lower surface of the modified PTFE film with liquid hot melt adhesive, bonding the upper layer fabric and the lower layer fabric, and performing hot-pressing compounding to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and is AP-J7738 universal;

the uniform coating is carried out, the glue amount of the upper surface and the lower surface of the modified PTFE membrane is consistent, and the total glue amount is controlled to be 11-17 g/m²；

And hot-pressing compounding, wherein the hot-pressing temperature is 110-150 ℃, and the hot-pressing time is 15-30 minutes.

Compared with the prior art, the invention has the following beneficial effects:

1. the fabric prepared by the invention has water seepage resistance and hydrostatic pressure of 178-192 cmH₂O, the peeling strength between the polyester fiber cloth layer and the PTFE film is 14.9 to 16.6N, and the moisture permeability is 5703 to 6100g/m²·d；

2. After the fabric prepared by the invention is washed for 50 times by high-temperature chlorine bleaching (washing for 20 minutes at 90 ℃, chlorine bleaching for 20 minutes at 60 ℃ and effective chlorine concentration of 50 mg/L), the fabric has water seepage resistance and hydrostatic pressure of 107-133 cmH₂O, the peeling strength between the polyester fiber cloth layer and the PTFE film is 8.1 to 10.9N, and the moisture permeability is 3576 to 4812g/m²D; and the washing fastness is 4-5 grade.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.

Example 1: preparation method of stock solution coloring chlorine-bleaching-resistant surgical gown fabric

The method comprises the following steps:

first, material selection of fabric

And (3) upper layer: the warp knitting machine consists of three yarns, namely a first warp, a second warp and a weft, wherein the first warp is closely arranged in parallel, the second warp parallel to the first warp is inserted into the weft every 10 mm of width, and two wefts are woven in the radial every 0.8 mm;

the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net;

the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive filament, and the twisting direction is as follows: z twist, twist: 450 twists per meter;

the weft yarn is a green dope-dyed polyester filament yarn DTY 75D/72F semi-gloss light net.

An intermediate layer: modified PTFE film with gram weight of 19g/m²Thermal stability of 200 ℃, thickness of 49um, hydrostatic pressure of 210KPa, and moisture permeability of 6950g/m²·d。

The lower layer is polyester filament weft-knitted fabric;

the knitted fabric is DTY 50D/36F weft plain stitch;

the gram weight of the knitted fabric is 65g/m²。

Preparation of modified PTFE membrane

1. Preparation of the impregnation liquid:

1) preparation of pre-dispersed nano titanium dioxide aqueous solution

Adding fatty amine polyoxyethylene ether into water, stirring and dissolving, slowly adding nano titanium dioxide powder at a stirring speed of 7500 r/min, stirring for 10 minutes after the addition is finished, stopping stirring, and then performing ultrasonic dispersion for 30 minutes to obtain a pre-dispersed nano titanium dioxide aqueous solution;

the nano titanium dioxide powder is rutile hydrophilic powder, the particle size distribution is 10-30 nm, and the purity is 99%;

the mass concentration of the titanium dioxide in the pre-dispersed nano titanium dioxide aqueous solution is 25%, and the mass content of the fatty amine polyoxyethylene ether is 0.8%.

2) Preparation of hydrogen peroxide-ionic liquid mixed liquor

Mixing 1-butyl-3-methylimidazole trifluoromethane sulfate and 1-butyl-3-methylimidazole p-methylbenzene sulfonate according to the mass ratio of 1:1, adding hydrogen peroxide, stirring and mixing to obtain hydrogen peroxide-ionic liquid mixed liquor with the hydrogen peroxide mass concentration of 25%;

the mass concentration of the hydrogen peroxide in the hydrogen peroxide is 50%.

3) To prepare the impregnation liquid

Mixing the pre-dispersed nano titanium dioxide aqueous solution and the hydrogen peroxide-ionic liquid mixed solution according to the mass ratio of 1:1, stirring strongly at 9000 r/min for 20 minutes, and then carrying out ultrasonic dispersion for 35 minutes to enable the solution to reach a clear and transparent state, thereby obtaining the impregnation solution.

2. Ultraviolet light treatment

Soaking a pre-deoiled and cleaned PTFE membrane into the impregnation liquid, irradiating the PTFE membrane for 2 hours by using ultraviolet light, taking out the PTFE membrane, repeatedly washing the PTFE membrane by using deionized water, and drying the PTFE membrane at 80 ℃ to obtain a modified PTFE membrane;

the weight of the PTFE membrane is 20g/m²Thermal stability of 210 ℃, thickness of 50um, hydrostatic pressure of 225KPa, and moisture permeability of 6960g/m²·d；

And ultraviolet light irradiation is carried out, an ultraviolet high-pressure mercury lamp is selected, the power is 500W, the wavelength is 365nm, and the distance between a light source and the PTFE film is fixed to be 10 cm.

Thirdly, gluing and compounding the fiber cloth and the modified PTFE film

Uniformly coating the upper surface and the lower surface of the modified PTFE film with liquid hot melt adhesive, bonding the upper layer fabric and the lower layer fabric, and performing hot-pressing compounding to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and the type is as follows: AP-J7738 general type;

the glue amount of the upper surface and the lower surface of the modified PTFE membrane is consistent by uniform coating, and the total glue amount is controlled to be 14 g/m²；

And hot-pressing compounding, wherein the hot-pressing temperature is 130 ℃, and the hot-pressing time is 20 minutes.

Hydrostatic water penetration resistance 192cmH for fabric prepared in example 1₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 16.6N, and the moisture permeability is 6100g/m²D; after the fabric is washed for 50 times by high-temperature chlorine bleaching (water washing at 90 ℃ for 20 minutes, chlorine bleaching at 60 ℃ for 20 minutes and effective chlorine concentration of 50 mg/L), the water seepage resistant hydrostatic pressure is 133cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 9.7N, and the moisture permeability is 3900g/m²D, washing fastness is 4-5 grades.

Example 2:

first, material selection of fabric

And (3) upper layer: the warp knitting machine consists of three yarns, namely a first warp, a second warp and a weft, wherein the first warp in the radial direction is closely arranged in parallel, the second warp parallel to the first warp is inserted into the weft every 10 mm of width, and two wefts are woven every 0.8 mm in the radial direction;

the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net;

the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive filament, and the twisting direction is as follows: z twist, twist: 450 twists per meter;

the weft yarn is a green dope-dyed polyester filament yarn DTY 75D/72F semi-gloss light net.

An intermediate layer: modified PTFE film with gram weight of 20g/m²Thermal stability 210 ℃, thickness of 50um, hydrostatic pressure of 220KPa, moisture permeability of 7000g/m²·d。

The lower layer is polyester filament weft-knitted fabric;

the knitted fabric is DTY 50D/36F weft plain stitch;

the gram weight of the knitted fabric is 65g/m²。

Preparation of modified PTFE membrane

1. Preparation of the impregnation liquid:

1) preparation of pre-dispersed nano titanium dioxide aqueous solution

Adding fatty amine polyoxyethylene ether into water, stirring and dissolving, slowly adding nano titanium dioxide powder under the condition that the stirring speed is 10000 r/min, stirring for 10 minutes after the addition is finished, stopping stirring, and then performing ultrasonic dispersion for 40 minutes to obtain a pre-dispersed nano titanium dioxide aqueous solution;

the nano titanium dioxide powder is rutile hydrophilic powder, the particle size distribution is 10-30 nm, and the purity is 99%;

the mass concentration of the titanium dioxide in the pre-dispersed nano titanium dioxide aqueous solution is 25%, and the mass content of the fatty amine polyoxyethylene ether is 1%.

2) Preparation of hydrogen peroxide-ionic liquid mixed liquor

Mixing 1-butyl-3-methylimidazole trifluoromethane sulfate and 1-butyl-3-methylimidazole p-methylbenzene sulfonate according to the mass ratio of 1:1, adding hydrogen peroxide, stirring and mixing to obtain a mixed solution with the mass concentration of hydrogen peroxide of 20%;

the mass concentration of the hydrogen peroxide in the hydrogen peroxide is 50%.

3) To prepare the impregnation liquid

Mixing the pre-dispersed nano titanium dioxide aqueous solution and the hydrogen peroxide-ionic liquid mixed solution according to the mass ratio of 1:1, strongly stirring the mixture for 40 minutes at the speed of 10000 r/min, and then ultrasonically dispersing the mixture for 35 minutes to ensure that the solution reaches a clear and transparent state to obtain the impregnation solution.

2. Ultraviolet light treatment

Soaking a pre-deoiled and cleaned PTFE membrane into the impregnation liquid, irradiating the PTFE membrane for 2.5 hours by using ultraviolet light, taking the PTFE membrane out, repeatedly washing the PTFE membrane by using deionized water, and drying the PTFE membrane at 80 ℃ to obtain a modified PTFE membrane;

the weight of the PTFE membrane is 20g/m²Thermal stability of 210 ℃, thickness of 50um, hydrostatic pressure of 225KPa, and moisture permeability of 6960g/m²·d；

And ultraviolet light irradiation is carried out, an ultraviolet high-pressure mercury lamp is selected, the power is 500W, the wavelength is 365nm, and the distance between a light source and the PTFE film is fixed to be 10 cm.

Thirdly, gluing and compounding the fiber cloth and the modified PTFE film

Uniformly coating the upper surface and the lower surface of the modified PTFE film with liquid hot melt adhesive, bonding the upper layer fabric and the lower layer fabric, and performing hot-pressing compounding to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and the type is as follows: AP-J7738 general type;

the glue amount of the upper surface and the lower surface of the modified PTFE membrane is consistent by uniform coating, and the total glue amount is controlled to be 17g/m²；

And hot-pressing compounding is carried out, wherein the hot-pressing temperature is 150 ℃, and the hot-pressing time is 30 minutes.

Example 2 preparation of a Fabric, resistance to Water hydrostatic pressure 186cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 15.2N, and the moisture permeability is 5703g/m²D; after the fabric is washed for 50 times by high-temperature chlorine bleaching (water washing at 90 ℃ for 20 minutes, chlorine bleaching at 60 ℃ for 20 minutes and effective chlorine concentration of 50 mg/L), the water seepage resistant hydrostatic pressure is 117cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 10.9N, and the moisture permeability is 3576g/m²D, washing fastness is 4-5 grades.

Example 3:

first, material selection of fabric

And (3) upper layer: the warp knitting machine consists of three yarns, namely a first warp, a second warp and a weft, wherein the first warp is closely arranged in parallel, the second warp parallel to the first warp is inserted into the weft every 10 mm of width, and two wefts are woven in the radial every 0.8 mm;

the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net;

the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive filament, and the twisting direction is as follows: z twist, twist: 450 twists per meter;

the weft yarn is a green dope-dyed polyester filament yarn DTY 75D/72F semi-gloss light net.

An intermediate layer: modified PTFE film with gram weight of 18g/m²The thermal stability is 190 ℃, the thickness is 48 mu m, the hydrostatic pressure is 200KPa, and the moisture permeability is 6850g/m²·d。

The lower layer is polyester filament weft-knitted fabric;

the knitted fabric is DTY 50D/36F weft plain stitch;

the gram weight of the knitted fabric is 65g/m²。

Preparation of modified PTFE membrane

1. Preparation of the impregnation liquid:

1) preparation of pre-dispersed nano titanium dioxide aqueous solution

Adding fatty amine polyoxyethylene ether into water, stirring and dissolving, slowly adding nano titanium dioxide powder at a stirring speed of 6000 rpm, stirring for 10 minutes after the addition is finished, stopping stirring, and then performing ultrasonic dispersion for 20 minutes to obtain a pre-dispersed nano titanium dioxide aqueous solution;

the nano titanium dioxide powder is rutile hydrophilic powder, the particle size distribution is 10-30 nm, and the purity is 99%;

the mass concentration of the titanium dioxide in the pre-dispersed nano titanium dioxide aqueous solution is 25%, and the mass content of the fatty amine polyoxyethylene ether is 0.5%.

2) Preparation of hydrogen peroxide-ionic liquid mixed liquor

Mixing 1-butyl-3-methylimidazole trifluoromethane sulfate and 1-butyl-3-methylimidazole p-methylbenzene sulfonate according to the mass ratio of 1:1, adding hydrogen peroxide, stirring and mixing to obtain a mixed solution with the mass concentration of hydrogen peroxide of 25%;

the mass concentration of the hydrogen peroxide in the hydrogen peroxide is 50%.

3) To prepare the impregnation liquid

Mixing the pre-dispersed nano titanium dioxide aqueous solution and the hydrogen peroxide-ionic liquid mixed solution according to the mass ratio of 1:1, stirring strongly at the speed of 6000 rpm for 20 minutes, and then carrying out ultrasonic dispersion for 35 minutes to enable the solution to reach a clear and transparent state, thereby obtaining the impregnation solution.

2. Ultraviolet light treatment

Soaking a pre-deoiled and cleaned PTFE membrane into the impregnation liquid, irradiating the PTFE membrane for 1 hour by using ultraviolet light, taking out the PTFE membrane, repeatedly washing the PTFE membrane by using deionized water, and drying the PTFE membrane at 80 ℃ to obtain a modified PTFE membrane;

the weight of the PTFE membrane is 20g/m²Thermal stability of 210 ℃, thickness of 50um, hydrostatic pressure of 225KPa, and moisture permeability of 6960g/m²·d；

And ultraviolet light irradiation is carried out, an ultraviolet high-pressure mercury lamp is selected, the power is 500W, the wavelength is 365nm, and the distance between a light source and the PTFE film is fixed to be 10 cm.

Thirdly, gluing and compounding the fiber cloth and the modified PTFE film

Uniformly coating the upper surface and the lower surface of the modified PTFE film with liquid hot melt adhesive, bonding the upper layer fabric and the lower layer fabric, and performing hot-pressing compounding to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and the type is as follows: AP-J7738 general type;

the uniform coating is carried out, the glue amount of the upper surface and the lower surface of the modified PTFE film is consistent, and the total glue amount is controlled to be 11 g/m²；

And hot-pressing compounding is carried out, wherein the hot-pressing temperature is 110 ℃, and the hot-pressing time is 15 minutes.

Example 3 preparation of a Fabric, resistance to Water Permeability hydrostatic pressure 178cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 14.9N, and the moisture permeability is 6030g/m²D; after the fabric is washed for 50 times by high-temperature chlorine bleaching (water washing at 90 ℃ for 20 minutes, chlorine bleaching at 60 ℃ for 20 minutes and effective chlorine concentration of 50 mg/L), the water seepage resistant hydrostatic pressure is 107cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 8.1N, and the moisture permeability is 4812g/m²D, washing fastness is 4-5 grades.

Comparative example 1:

first, material selection of fabric

And (3) upper layer: the warp knitting machine consists of three yarns, namely a first warp, a second warp and a weft, wherein the first warp is closely arranged in parallel, the second warp parallel to the first warp is inserted into the weft every 10 mm of width, and two wefts are woven in the radial every 0.8 mm;

the first warp yarn is a green dope dyed polyester filament yarn DTY 75D/72F semi-gloss light net;

the second warp is formed by twisting DTY 75D/36F black semi-bright filament and nylon-based 20D/3F black conductive filament, and the twisting direction is as follows: z twist, twist: 450 twists per meter;

the weft yarn is a green dope-dyed polyester filament yarn DTY 75D/72F semi-gloss light net.

An intermediate layer: PTFE film with a grammage of 20g/m²Thermal stability of 190 ℃, thickness of 50um, hydrostatic pressure of 220KPa, and moisture permeability of 7000g/m²·d。

The lower layer is polyester filament weft-knitted fabric;

the knitted fabric is DTY 50D/36F weft plain stitch;

the gram weight of the knitted fabric is 65g/m²。

Secondly, gluing and compounding the fiber cloth and the PTFE film

Degreasing, cleaning and drying the PTFE film, uniformly coating liquid hot melt adhesive on the upper surface and the lower surface of the PTFE film, adhering the upper layer fabric and the lower layer fabric, and performing hot-pressing compounding to obtain a finished product of the fabric of the surgical gown;

the liquid hot melt adhesive is a reactive polyurethane hot melt adhesive, and the type is as follows: AP-J7738 general type;

the glue amount of the upper surface and the lower surface of the modified PTFE membrane is consistent by uniform coating, and the total glue amount is controlled to be 14 g/m²；

And hot-pressing compounding, wherein the hot-pressing temperature is 130 ℃, and the hot-pressing time is 20 minutes.

The fabric prepared in comparative example 1 had a hydrostatic water pressure resistance of 181cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 4.3N, and the moisture permeability is 6343g/m²D; after the fabric is washed for 50 times by high-temperature chlorine bleaching (water washing at 90 ℃ for 20 minutes, chlorine bleaching at 60 ℃ for 20 minutes and effective chlorine concentration of 50 mg/L), the water seepage resistant hydrostatic pressure is 102cmH₂O, the peeling strength of the polyester fiber cloth layer and the PTFE film is 1.9N, and the moisture permeability is 2005g/m²D, washing fastness is 4-5 grades.

The peeling strength test above refers to FZT 60011-.