阅读说明：本技术 一种防油防水的台布生产工艺 (Oil-proof and water-proof tablecloth production process ) 是由 杨惠林 张资浩 张琳 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种防油防水的台布生产工艺,包括制备底膜、制备表膜、表膜与底膜高温贴合,形成预处理台布、预处理台布进行表面疏水处理、预处理台布表面印染等步骤,最后得到表面疏水疏油的台布。制备底膜时通过季胺化反应,利用甲基丙烯酸酐对明胶进行改性,参与自由基聚合并得到交联密度大的高强度凝胶,即改性明胶,并以此作为交联剂；再将制备的改性明胶、PVC树脂、增塑剂、发泡剂、填充剂混合,并通过塑化制得台布底膜。本发明公开了一种防油防水的台布生产工艺,工艺设计合理,操作简单,制备得到的台布不仅具有较优异的防水性能,同时防油性能优异,且通过本技术方案制备的台布的外观平整,具有较高的实用性。(The invention discloses an oil-proof and water-proof tablecloth production process which comprises the steps of preparing a bottom film, preparing a surface film, attaching the surface film and the bottom film at a high temperature to form a pretreated tablecloth, performing surface hydrophobic treatment on the pretreated tablecloth, printing and dyeing the surface of the pretreated tablecloth, and the like, and finally obtaining the surface hydrophobic and oleophobic tablecloth. The preparation method comprises the following steps of modifying gelatin by methacrylic anhydride through a quaternization reaction during preparation of the basement membrane, participating in radical polymerization to obtain high-strength gel with high crosslinking density, namely modified gelatin, and taking the gel as a crosslinking agent; and mixing the prepared modified gelatin, PVC resin, plasticizer, foaming agent and filler, and plasticizing to obtain the tablecloth basement membrane. The invention discloses a production process of oil-proof and water-proof tablecloth, which is reasonable in process design and simple to operate, the prepared tablecloth has excellent water-proof performance and oil-proof performance, and the tablecloth prepared by the technical scheme is smooth in appearance and high in practicability.)

1. A production process of oil-proof and water-proof tablecloth is characterized by comprising the following steps: the method comprises the following steps:

1) preparing raw materials;

2) preparing a basement membrane;

3) preparing a surface film;

4) the surface film and the bottom film are jointed at high temperature to form pretreated tablecloth;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth;

6) and (4) pretreating the surface of the tablecloth, and printing and dyeing to obtain a finished product.

2. The production process of the oil-proof and water-proof tablecloth according to claim 1, characterized in that: the method comprises the following steps:

1) preparing raw materials:

a) weighing raw materials of each component of the basement membrane and the surface membrane according to a proportion;

b) weighing ammonia water, polyacrylic acid, ethyl orthosilicate, 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene, azobisisobutyronitrile and butanone according to a proportion for later use;

2) preparing a base film: taking the materials prepared in the step 1), stirring, mixing, plasticizing, and conveying to a laminator through an extruder for calendering to obtain a basement membrane;

3) preparing a surface film; taking the material prepared in the step 1), stirring, mixing, plasticizing, and conveying to a glue spreader through an extruder for calendering to obtain a surface film;

4) taking the surface film and the bottom film prepared in the step 2) and the step 3), attaching at high temperature, cooling and drying to obtain pretreated tablecloth;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth:

A. adsorbing the pretreated tablecloth obtained in the step 4) on a sucker of a spin coater, and coating positive photoresist on the upper surface of the pretreated tablecloth to form a masking film;

B. exposing the pretreated tablecloth with the masking film to obtain a preset photoetching pattern on the masking film;

C. placing the exposed pretreated tablecloth in an oven for baking, placing the baked pretreated tablecloth in a developing corrosive liquid for developing and etching, and drying by hot nitrogen after cleaning;

D. preparing a KOH absolute ethyl alcohol solution with the mass fraction of 5-8%, uniformly stirring, immersing the pretreated tablecloth obtained after the operation of the step C into the solution for 5-8min, and drying;

E. dripping the polyacrylic acid prepared in the step 1) into a beaker filled with ammonia water, stirring until the polyacrylic acid is completely dissolved, adding absolute ethyl alcohol, and mixing and stirring; adding tetraethoxysilane, continuously stirring for 6-6.5h, performing high-speed centrifugation after stirring, taking supernate, adding absolute ethyl alcohol into the supernate, performing ultrasonic dispersion, repeating the centrifugation step for 3-5 times, collecting white blocks at the bottom of a centrifuge tube, drying at 80-85 ℃, and grinding to obtain a material C;

F. taking the material C, preparing into suspension, putting the dried pretreated tablecloth into the suspension, soaking for 0.5-1min, drying, and repeating the steps for 3-5 times;

G. sequentially adding butanone into the 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene prepared in the step 1) under the protection of nitrogen, stirring and heating to 60-65 ℃; adding azodiisobutyronitrile, reacting under heat preservation, purifying, and vacuum drying to obtain material D;

H. taking the material D, preparing a butanone solution with the concentration of 0.5%, putting the pretreated tablecloth treated in the step F into the butanone solution, soaking for 0.5-1min, drying, and repeating the step for 3-5 times;

I. taking the pretreated tablecloth obtained in the step H, corroding the positive photoresist of the unexposed area on the mask film, cleaning and drying by nitrogen;

6) pretreating the surface of the tablecloth and printing and dyeing: and (3) taking the pretreated tablecloth treated in the step 5), carrying out surface printing and dyeing according to a preset printing and dyeing pattern, and cleaning and drying to obtain a finished product.

3. The production process of the oil-proof and water-proof tablecloth according to claim 2, characterized in that: the method comprises the following steps:

1) preparing raw materials:

a) weighing raw materials of each component of the basement membrane according to a proportion, wherein the raw materials comprise PVC resin, a plasticizer, a foaming agent, a filling agent, gelatin and methacrylic anhydride for later use;

b) weighing raw materials of each component of the surface film, including PVC resin, thermoplastic polyurethane elastomer rubber, calcium carbonate, a plasticizer, a foaming agent, hot melt adhesive and an initiator according to a proportion for later use;

c) weighing ammonia water, polyacrylic acid, ethyl orthosilicate, 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene, azobisisobutyronitrile and butanone according to a proportion for later use;

2) preparing a base film:

a) putting the gelatin prepared in the step 1) into a three-neck flask with distilled water, heating the gelatin in a water bath to 60-65 ℃, preserving the heat, reacting for 1-1.5h until the gelatin is completely dissolved, slowly dropwise adding methacrylic anhydride, reacting for 3-3.5h, keeping a nitrogen environment in the reaction, dialyzing by a dialysis membrane, and freeze-drying to obtain a material A;

b) taking PVC resin, a plasticizer, a foaming agent, a filler and a material A, stirring, mixing, plasticizing, conveying to a laminator through an extruder, and calendering to obtain a basement membrane; wherein the plasticizing temperature is 140-150 ℃;

3) preparing a surface film:

a) putting the hot melt adhesive prepared in the step 1) into a three-neck flask, heating the three-neck flask to 160 ℃ in an oil bath, preserving the heat for 30-35min, adding an initiator, uniformly stirring, cooling, drying and crushing to obtain a material B;

b) taking PVC resin, thermoplastic polyurethane elastomer rubber, calcium carbonate, a plasticizer, a foaming agent, acrylamide and a material B, stirring, mixing, plasticizing, conveying to a laminator through an extruder, and calendering to obtain a surface film; wherein the plasticizing temperature is 130-140 ℃;

4) taking the surface film and the bottom film prepared in the step 2) and the step 3), attaching at high temperature, cooling and drying to obtain pretreated tablecloth;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth:

A. adsorbing the pretreated tablecloth obtained in the step 4) on a sucker of a spin coater, and coating positive photoresist on the upper surface of the pretreated tablecloth to form a masking film;

B. exposing the pretreated tablecloth with the mask film to form a preset photoetching pattern on the mask film, wherein the illumination intensity is 6-9 muW/cm²The exposure time is 10-15 s;

C. placing the exposed pretreated tablecloth in an oven for baking at 90-100 deg.C for 15-20 min; placing the baked pretreated tablecloth in a developing corrosive liquid for developing and etching, and drying the pretreated tablecloth by hot nitrogen after cleaning;

D. preparing a KOH absolute ethyl alcohol solution with the mass fraction of 5-8%, uniformly stirring at 45-50 ℃, immersing the pretreated tablecloth obtained after the operation of the step C into the solution for 5-8min, and drying;

E. dripping the polyacrylic acid prepared in the step 1) into a beaker filled with ammonia water, stirring until the polyacrylic acid is completely dissolved, adding absolute ethyl alcohol, and mixing and stirring for 60-70 min; adding tetraethoxysilane, continuing stirring for 6-6.5h, performing high-speed centrifugation for 15-18min after stirring, taking supernate, adding absolute ethyl alcohol into the supernate, performing ultrasonic dispersion for 10-20min, repeating the centrifugation step for 3-5 times, collecting white blocks at the bottom of a centrifuge tube, drying at 80-85 ℃, and grinding to obtain a material C;

F. taking the material C, preparing into suspension, putting the dried pretreated tablecloth into the suspension, soaking for 0.5-1min, drying, and repeating the steps for 3-5 times;

G. sequentially adding butanone into the 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene prepared in the step 1) under the protection of nitrogen, stirring for 1-1.2h, and heating to 60-65 ℃; adding azodiisobutyronitrile, reacting for 36-40h under heat preservation, purifying, and vacuum drying for 20-24h to obtain a material D;

H. taking the material D, preparing a butanone solution with the concentration of 0.5%, putting the pretreated tablecloth treated in the step F into the butanone solution, soaking for 0.5-1min, drying, and repeating the step for 3-5 times;

I. taking the pretreated tablecloth obtained in the step H, corroding the positive photoresist of the unexposed area on the mask film, cleaning for 10-12min, and drying by nitrogen;

6) pretreating the surface of the tablecloth and printing and dyeing: and (3) taking the pretreated tablecloth treated in the step 5), carrying out surface printing and dyeing according to a preset printing and dyeing pattern, and cleaning and drying to obtain a finished product.

4. The production process of the oil-proof and water-proof tablecloth according to claim 3, characterized in that: in the step 1), the base film comprises the following raw material components: 50-55 parts of PVC resin, 24-28 parts of plasticizer, 1-2 parts of foaming agent, 10-15 parts of filler, 10-20 parts of gelatin and 5-15 parts of methacrylic anhydride.

5. The production process of the oil-proof and water-proof tablecloth according to claim 3, characterized in that: in the step 1), the surface film comprises the following raw material components: 30-40 parts of PVC resin, 10-15 parts of thermoplastic polyurethane elastomer rubber, 5-8 parts of calcium carbonate, 8-14 parts of plasticizer, 3-5 parts of foaming agent, 12-20 parts of hot melt adhesive, 1-3 parts of initiator and 5-20 parts of acrylamide.

6. The production process of the oil-proof and water-proof tablecloth according to claim 3, characterized in that: the preset photoetching pattern in the step 5) is consistent with the preset printing and dyeing pattern in the step 6).

7. The production process of the oil-proof and water-proof tablecloth according to any one of claims 4 to 5, characterized in that: the plasticizer is any one or combination of epoxy methyl ester, ethyl ester and soybean oil.

8. The production process of the oil-proof and water-proof tablecloth according to any one of claims 4 to 5, characterized in that: the foaming agent is ADC foaming agent.

Technical Field

The invention relates to the technical field of tablecloth processing, in particular to a production process of oil-proof and water-proof tablecloth.

Background

Tablecloths, also known as table cloths, are sheets of tabletop embellishment or protection made of cloth, plastic products or other fabrics, and sheets of cloth or similar cloth laid on the tabletop for decoration or protection. Nowadays, there are many kinds of tablecloths, which are classified according to production processes and can be classified into plastics: polyvinyl tablecloths such as PVC tablecloth, EVA tablecloth, PEVA tablecloth, pyrograph tablecloth, cotton substrate PVC tablecloth, PP tablecloth and the like, and cast film tablecloth; weaving: polyester cotton slub printing tablecloth, polyester cotton knitted lace tablecloth, pure cotton mercerized net buckle tablecloth, polyester silk warp knitting jacquard tablecloth, pure cotton mercerized jacquard tablecloth, polyester cotton plain weave printing tablecloth, polyester cotton plain weave embroidery tablecloth, flax knitted lace tablecloth, polyester linen plain weave applique tablecloth, VS tablecloth and star silk tablecloth.

The tablecloth generally contacts with more water and oil when in work, and after the tablecloth is used for a long time, the tablecloth is extremely easy to be worn and damaged, namely the waterproof and oilproof performance of the existing tablecloth can not meet the requirements of people, and inconvenience is brought to people.

Aiming at the problems, a production process of an oil-proof and water-proof tablecloth is designed for producing the water-proof and oil-proof tablecloth, which is one of the problems to be solved urgently.

Disclosure of Invention

The invention aims to provide a production process of oil-proof and water-proof tablecloth, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a production process of oil-proof and water-proof tablecloth comprises the following steps:

1) preparing raw materials;

2) preparing a basement membrane;

3) preparing a surface film;

4) the surface film and the bottom film are jointed at high temperature to form pretreated tablecloth;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth;

6) and (4) pretreating the surface of the tablecloth, and printing and dyeing to obtain a finished product.

The application discloses grease proofing waterproof tablecloth production technology, including preparation basement membrane, preparation surface film, pellicle and basement membrane high temperature laminating, form preliminary treatment tablecloth, preliminary treatment tablecloth carries out steps such as surface hydrophobic treatment, preliminary treatment tablecloth surface printing and dyeing, obtains the hydrophobic oleophobic tablecloth in surface at last.

Preferably, the method comprises the following steps:

1) preparing raw materials:

a) weighing raw materials of each component of the basement membrane and the surface membrane according to a proportion;

b) weighing ammonia water, polyacrylic acid, ethyl orthosilicate, 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene, azobisisobutyronitrile and butanone according to a proportion for later use;

2) preparing a base film: taking the materials prepared in the step 1), stirring, mixing, plasticizing, and conveying to a laminator through an extruder for calendering to obtain a basement membrane;

3) preparing a surface film; taking the material prepared in the step 1), stirring, mixing, plasticizing, and conveying to a glue spreader through an extruder for calendering to obtain a surface film;

4) taking the surface film and the bottom film prepared in the step 2) and the step 3), attaching at high temperature, cooling and drying to obtain pretreated tablecloth;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth:

A. adsorbing the pretreated tablecloth obtained in the step 4) on a sucker of a spin coater, and coating positive photoresist on the upper surface of the pretreated tablecloth to form a masking film;

B. exposing the pretreated tablecloth with the masking film to obtain a preset photoetching pattern on the masking film;

C. placing the exposed pretreated tablecloth in an oven for baking, placing the baked pretreated tablecloth in a developing corrosive liquid for developing and etching, and drying by hot nitrogen after cleaning;

D. preparing a KOH absolute ethyl alcohol solution with the mass fraction of 5-8%, uniformly stirring, immersing the pretreated tablecloth obtained after the operation of the step C into the solution for 5-8min, and drying;

E. dripping the polyacrylic acid prepared in the step 1) into a beaker filled with ammonia water, stirring until the polyacrylic acid is completely dissolved, adding absolute ethyl alcohol, and mixing and stirring; adding tetraethoxysilane, continuously stirring for 6-6.5h, performing high-speed centrifugation after stirring, taking supernate, adding absolute ethyl alcohol into the supernate, performing ultrasonic dispersion, repeating the centrifugation step for 3-5 times, collecting white blocks at the bottom of a centrifuge tube, drying at 80-85 ℃, and grinding to obtain a material C;

F. taking the material C, preparing into suspension, putting the dried pretreated tablecloth into the suspension, soaking for 0.5-1min, drying, and repeating the steps for 3-5 times;

G. sequentially adding butanone into the 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene prepared in the step 1) under the protection of nitrogen, stirring and heating to 60-65 ℃; adding azodiisobutyronitrile, reacting under heat preservation, purifying, and vacuum drying to obtain material D;

H. taking the material D, preparing a butanone solution with the concentration of 0.5%, putting the pretreated tablecloth treated in the step F into the butanone solution, soaking for 0.5-1min, drying, and repeating the step for 3-5 times;

I. taking the pretreated tablecloth obtained in the step H, corroding the positive photoresist of the unexposed area on the mask film, cleaning and drying by nitrogen;

6) pretreating the surface of the tablecloth and printing and dyeing: and (3) taking the pretreated tablecloth treated in the step 5), carrying out surface printing and dyeing according to a preset printing and dyeing pattern, and cleaning and drying to obtain a finished product.

Preferably, the method comprises the following steps:

1) preparing raw materials:

a) weighing raw materials of each component of the basement membrane according to a proportion, wherein the raw materials comprise PVC resin, a plasticizer, a foaming agent, a filling agent, gelatin and methacrylic anhydride for later use;

b) weighing raw materials of each component of the surface film, including PVC resin, thermoplastic polyurethane elastomer rubber, calcium carbonate, a plasticizer, a foaming agent, hot melt adhesive and an initiator according to a proportion for later use;

c) weighing ammonia water, polyacrylic acid, ethyl orthosilicate, 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene, azobisisobutyronitrile and butanone according to a proportion for later use; preparing raw materials of each component in the step 1) to ensure that the subsequent operation is carried out smoothly;

2) preparing a base film:

a) putting the gelatin prepared in the step 1) into a three-neck flask with distilled water, heating the gelatin in a water bath to 60-65 ℃, preserving the heat, reacting for 1-1.5h until the gelatin is completely dissolved, slowly dropwise adding methacrylic anhydride, reacting for 3-3.5h, keeping a nitrogen environment in the reaction, dialyzing by a dialysis membrane, and freeze-drying to obtain a material A; preparing a bottom film in the step 2), namely firstly modifying gelatin by methacrylic anhydride through quaternization reaction, participating in free radical polymerization to obtain high-strength gel with high crosslinking density, namely modified gelatin, and taking the gel as a crosslinking agent;

b) taking PVC resin, a plasticizer, a foaming agent, a filler and a material A, stirring, mixing, plasticizing, conveying to a laminator through an extruder, and calendering to obtain a basement membrane; wherein the plasticizing temperature is 140-150 ℃; in the step b) of the step 2), mixing the prepared modified gelatin, PVC resin, plasticizer, foaming agent and filler, and plasticizing to obtain a tablecloth basement membrane;

3) preparing a surface film:

a) putting the hot melt adhesive prepared in the step 1) into a three-neck flask, heating the three-neck flask to 160 ℃ in an oil bath, preserving the heat for 30-35min, adding an initiator, uniformly stirring, cooling, drying and crushing to obtain a material B; mixing the hot melt adhesive with the initiator in the step a) of the step 3), and cooling to room temperature to obtain a material B released at high temperature, namely the hot melt adhesive wrapped with the initiator;

b) taking PVC resin, thermoplastic polyurethane elastomer rubber, calcium carbonate, a plasticizer, a foaming agent, acrylamide and a material B, stirring, mixing, plasticizing, conveying to a laminator through an extruder, and calendering to obtain a surface film; wherein the plasticizing temperature is 130-140 ℃; mixing PVC resin, thermoplastic polyurethane elastomer rubber, calcium carbonate, a plasticizer, a foaming agent and the material B in the step B) of the step 3), and plasticizing to prepare a surface film;

4) taking the surface film and the bottom film prepared in the step 2) and the step 3), attaching at high temperature, cooling and drying to obtain pretreated tablecloth; performing high-temperature bonding in the step 4) to form a pretreated tablecloth, releasing an initiator in the surface film at high temperature, performing free radical initiated polymerization at high temperature by taking an acrylamide polymerization chain as a framework and taking modified gelatin in the bottom film as a cross-linking agent to obtain gel, wherein the generation of the gel can enable the surface film and the bottom film to be more closely bonded, and the obtained pretreated tablecloth has better smoothness;

5) carrying out surface hydrophobic treatment on the pretreated tablecloth:

A. adsorbing the pretreated tablecloth obtained in the step 4) on a sucker of a spin coater, and coating positive photoresist on the upper surface of the pretreated tablecloth to form a masking film;

B. exposing the pretreated tablecloth with the mask film to form a preset photoetching pattern on the mask film, wherein the illumination intensity is 6-9 muW/cm²The exposure time is 10-15 s;

C. placing the exposed pretreated tablecloth in an oven for baking at 90-100 deg.C for 15-20 min; placing the baked pretreated tablecloth in a developing corrosive liquid for developing and etching, and drying the pretreated tablecloth by hot nitrogen after cleaning; step 5), firstly coating a positive photoresist on a surface film of the pretreated tablecloth, forming a mask layer, then exposing, and exposing a preset photoetching pattern on the surface of the mask layer, wherein the photoetching pattern is a pattern designed in advance on the surface of the tablecloth; etching the unexposed part of the photoresist by developing and etching, wherein the exposed part of the photoresist also covers the pretreated tablecloth;

D. preparing a KOH absolute ethyl alcohol solution with the mass fraction of 5-8%, uniformly stirring at 45-50 ℃, immersing the pretreated tablecloth obtained after the operation of the step C into the solution for 5-8min, and drying; in the step, the surface of the table cloth is pretreated by KOH treatment, so that the surface of the table cloth has better hydrophilicity, the surface of the pretreated table cloth after the KOH treatment can be tightly combined with the surface of the subsequently generated composite particles, and the surface roughness of the pretreated table cloth is effectively improved;

E. dripping the polyacrylic acid prepared in the step 1) into a beaker filled with ammonia water, stirring until the polyacrylic acid is completely dissolved, adding absolute ethyl alcohol, and mixing and stirring for 60-70 min; adding tetraethoxysilane, continuing stirring for 6-6.5h, performing high-speed centrifugation for 15-18min after stirring, taking supernate, adding absolute ethyl alcohol into the supernate, performing ultrasonic dispersion for 10-20min, repeating the centrifugation step for 3-5 times, collecting white blocks at the bottom of a centrifuge tube, drying at 80-85 ℃, and grinding to obtain a material C; in the step E of the step 5), silica particles are generated through an tetraethoxysilane hydrolysis system, polyacrylic acid is hydrolyzed after polyacrylic acid is added into the system, long chains generated by hydrolysis are wound randomly, a three-dimensional network structure is formed in a short time, microspheres are formed, polysilicic acid generated by tetraethoxysilane hydrolysis and polycondensation reaction is attached to and coated on the surfaces of the polyacrylic acid microspheres, and monodisperse composite particles taking PAA as a core SiO2 as a shell are slowly generated;

F. taking the material C, preparing into suspension, putting the dried pretreated tablecloth into the suspension, soaking for 0.5-1min, drying, and repeating the steps for 3-5 times;

G. sequentially adding butanone into the 4-perfluoro (2-isopropyl-1, 3-dimethyl-1-butenyl) oxystyrene prepared in the step 1) under the protection of nitrogen, stirring for 1-1.2h, and heating to 60-65 ℃; adding azodiisobutyronitrile, reacting for 36-40h under heat preservation, purifying, and vacuum drying for 20-24h to obtain a material D;

H. taking the material D, preparing a butanone solution with the concentration of 0.5%, putting the pretreated tablecloth treated in the step F into the butanone solution, soaking for 0.5-1min, drying, and repeating the step for 3-5 times; in the step H, a fluorine-containing compound is grafted on the surface of the composite particle, so that the purposes of introducing a low-surface-energy substance and changing the surface microstructure of the low-surface-energy substance are achieved, and the polymer coating film obtained through the operation in the step E has high hydrophobic and oleophobic properties;

I. taking the pretreated tablecloth obtained in the step H, corroding the positive photoresist of the unexposed area on the mask film, cleaning for 10-12min, and drying by nitrogen; step H, etching the residual positive photoresist on the mask film;

6) pretreating the surface of the tablecloth and printing and dyeing: and (3) taking the pretreated tablecloth treated in the step 5), carrying out surface printing and dyeing according to a preset printing and dyeing pattern, and cleaning and drying to obtain a finished product. In the step 6), the trace of the photoetching pattern is remained on the pretreated tablecloth, and the rest parts of the tablecloth are provided with the hydrophobic and oleophobic membranes;

preferably, in the step 1), the base film comprises the following raw material components: 50-55 parts of PVC resin, 24-28 parts of plasticizer, 1-2 parts of foaming agent, 10-15 parts of filler, 10-20 parts of gelatin and 5-15 parts of methacrylic anhydride.

Preferably, in the step 1), the raw material components of the surface film are as follows: 30-40 parts of PVC resin, 10-15 parts of thermoplastic polyurethane elastomer rubber, 5-8 parts of calcium carbonate, 8-14 parts of plasticizer, 3-5 parts of foaming agent, 12-20 parts of hot melt adhesive, 1-3 parts of initiator and 5-20 parts of acrylamide.

Preferably, the preset photoetching pattern in the step 5) is consistent with the preset printing and dyeing pattern in the step 6).

Preferably, the plasticizer is any one or combination of methyl epoxide, ethyl ester and soybean oil.

Preferably, the blowing agent is an ADC blowing agent.

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

when the gel is prepared, firstly, the basement membrane is prepared, methacrylic anhydride is used for modifying gelatin through quaternization reaction, and the gelatin participates in free radical polymerization to obtain high-strength gel with high crosslinking density, namely the modified gelatin, and the gel is used as a crosslinking agent; and mixing the prepared modified gelatin, PVC resin, plasticizer, foaming agent and filler, and plasticizing to obtain the tablecloth basement membrane.

Preparing a surface film, mixing the hot melt adhesive with an initiator, and cooling to room temperature to obtain a material B released at high temperature, namely the hot melt adhesive wrapped with the initiator; and then mixing the PVC resin, the thermoplastic polyurethane elastomer rubber, the calcium carbonate, the plasticizer, the foaming agent and the material B, and plasticizing to prepare the surface film. The design is convenient for releasing the initiator in the surface film at high temperature when the surface film and the bottom film are sequentially attached at high temperature, the acrylamide polymerization chain is used as a framework, the modified gelatin in the bottom film is used as a cross-linking agent, free radical initiated polymerization is carried out at high temperature, gel is obtained, the cross-linking between the surface film and the bottom film can be more closely attached due to the generation of the gel, and the obtained pretreated tablecloth has better smoothness.

Coating a positive photoresist on the surface film of the pretreated tablecloth, forming a mask layer, exposing, and exposing to obtain a preset photoetching pattern on the surface of the mask layer, wherein the photoetching pattern is a pattern designed in advance on the surface of the tablecloth; etching the unexposed part of the photoresist by developing and etching, wherein the exposed part of the photoresist also covers the pretreated tablecloth; the step is convenient for subsequent coating of the hydrophobic and oleophobic membrane, and is also convenient for subsequent pattern printing and dyeing, thereby improving the product yield and facilitating the actual operation while ensuring the integrity of the pattern printing and dyeing.

The surface of the tablecloth is pretreated by KOH treatment, so that the surface of the tablecloth has better hydrophilicity, the surface of the pretreated tablecloth after the KOH treatment can be tightly combined with the surface of the subsequently generated composite particles, and the surface roughness of the pretreated tablecloth is effectively improved; grafting a fluorine-containing compound on the surface of the composite particle to achieve the purposes of introducing a low-surface-energy substance and changing the surface microstructure of the low-surface-energy substance, wherein the polymer coating film obtained by the operation in the step E has high water and oil repellency;

the invention discloses a production process of oil-proof and water-proof tablecloth, which is reasonable in process design and simple to operate, the prepared tablecloth has excellent water-proof performance and oil-proof performance, and the tablecloth prepared by the technical scheme is smooth in appearance and high in practicability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.