CN110843372A

CN110843372A - Printed embossed white PVC tablecloth and production process thereof

Info

Publication number: CN110843372A
Application number: CN201911153997.3A
Authority: CN
Inventors: 刘承发
Original assignee: DONGGUAN IUIU HOUSEHOLD PRODUCTS Co Ltd
Current assignee: DONGGUAN IUIU HOUSEHOLD PRODUCTS Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-02-28
Anticipated expiration: 2039-11-22
Also published as: CN110843372B

Abstract

The invention relates to the field of household articles, in particular to a printed and embossed white PVC tablecloth and a production process thereof, wherein the production process of the printed and embossed white PVC tablecloth comprises the following steps: s1: preparing a white PVC base layer and a printing film; s2: embossing, namely adopting an embossing roller to carry out calendering on the surface of the white PVC base layer to obtain an embossing pattern; s3: attaching and transferring, namely attaching the printing film to the white PVC base layer at high temperature, transferring the printing pattern on the printing film to the white PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s4: and (6) rolling. The tablecloth is safe and environment-friendly, good in flame retardance, good in anti-aging and anti-ultraviolet effects, white and flawless in surface, high in glossiness, good in thermal stability, clear in printed patterns, strong in pattern display force, soft and comfortable, good in decoration effect, high in production efficiency and low in production cost.

Description

Printed embossed white PVC tablecloth and production process thereof

Technical Field

The invention relates to the field of household articles, in particular to printed and embossed white PVC tablecloth and a production process thereof.

Background

The tablecloth is an article which is covered on a table or a tabletop and used for preventing dirt or increasing the appearance. The plastic material is classified according to production process and mainly divided into two major types, namely plastic type and textile type, wherein the plastic type comprises polyvinyl tablecloth such as PVC tablecloth, EVA tablecloth, PEVA tablecloth, pyrograph tablecloth, cotton substrate PVC tablecloth and PP tablecloth, and cast film tablecloth. The PVC tablecloth is widely applied to daily life due to the reasons of easy cleaning, convenience, practicability and the like.

The traditional PVC tablecloth is in a transparent printing shape, on one hand, the PVC tablecloth with a transparent ground color has the defects of poor brightness, high haze, low glossiness, poor thermal stability, high thermal shrinkage, poor refraction effect, poor pattern display force and the like, on the second hand, the PVC tablecloth cannot present a white and flawless feeling, and on the third hand, when embossing is printed on the surface of the PVC tablecloth, the embossing is not prominent, and the decorative effect is poor.

Disclosure of Invention

In order to solve the problems, the invention provides the printed embossed white PVC tablecloth which is safe, environment-friendly, good in flame retardance, ageing-resistant and ultraviolet-resistant effects, white and flawless in surface, high in glossiness, good in thermal stability, clear in printed patterns, strong in pattern display force, soft and comfortable, good in decoration effect, high in production efficiency and low in production cost, and the production process thereof.

The technical scheme adopted by the invention is as follows: the production process of the printed and embossed white PVC tablecloth comprises the following steps: s1: preparing a white PVC base layer and a printing film; s2: embossing, namely adopting an embossing roller to carry out calendering on the surface of the white PVC base layer to obtain an embossing pattern; s3: attaching and transferring, namely attaching the printing film to the white PVC base layer at high temperature, transferring the printing pattern on the printing film to the white PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s4: and (6) rolling.

The technical scheme is further improved in that in S1, when a white PVC base layer is manufactured, the white PVC base layer comprises, by mass, 35-75 parts of dioctyl phthalate, 20-80 parts of PVC resin powder, 50-80 parts of calcium carbonate filler, 2-5 parts of OBSH foaming agent, 2-3 parts of natural rubber, 1-3 parts of paraffin, 0.02-0.3 part of heat stabilizer, 0.02-0.3 part of titanium dioxide and 0.01-0.2 part of processing aid; the manufacturing method of the white PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a white PVC base layer; the oil content of the PVC resin powder is controlled between 45 Pa and 55 Pa, and the thickness of the white PVC base layer is 0.25mm to 0.27 mm.

The technical scheme is further improved in that in S1, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

The technical scheme is further improved in that in the S2, in the embossing process, the embossing roller frozen water circulation is conducted, the temperature is 6-8 ℃, the pressure is 7.5 kg/cm & lt 8.5 kg/cm & gt, the rotating speed is 10-25 m/min, and the moving speed can be adjusted to 10-20 mm in a left-right direction and 8-15 mm in an up-down direction through manual adjustment.

The technical scheme is further improved in that in S3, the attaching and transferring process comprises a first attaching device and a second attaching device, the temperature of the first attaching device is 120-150 ℃, the rotating speed of a preheating roller is 7-9 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the coiling speed is 60-90 m/min; the temperature of a cooling roller of the first laminating device is 8-10 ℃, the breadth shrinkage is less than or equal to 1cm, the rotating speed is 7-17 RPM/min, the low-speed rotating speed is 3-13 RPM/min, and the high-speed printing speed is 15-25 RPM/min; the temperature of the second laminating device is 180-190 ℃, the laminating time is 40-45 s, the traction tension is 3.0-4.0 kg/cm, the coiling speed is 20-25 m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 2-8 ℃, the cooling group is cooled and shaped for four times, the linear speed of each group is increased by 2-3 ℃ in sequence, and the cooling group is synchronized with the embossing rollers.

The technical scheme is further improved in that in S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat to operate, the vat operating temperature is 180-200 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 20-30 cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conduction oil closed circulation.

The technical scheme is further improved in that in the transfer attaching process, in the step S4, the embossed pattern and the printed pattern are accurately registered through the superposition of the contour positioning of the embossed pattern and the contour positioning of the printed pattern.

According to the technical scheme, in the S5, in the winding process, the pressures of the winding rubber roller, the winding silica gel roller and the winding bending roller are all 3 kg/4 kg/cm, the winding traction tension is 2.5 kg/cm/3.5 kg/cm, and the winding speed is 10 m/min-25 m/min.

The technical scheme is further improved in that in S1, when a white PVC base layer is manufactured, the white PVC base layer comprises 65 parts of dioctyl phthalate, 58 parts of PVC resin powder, 70 parts of calcium carbonate filler, 3 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1 part of paraffin, 0.15 part of heat stabilizer, 0.25 part of titanium dioxide and 0.1 part of processing aid in parts by mass; the processing aid comprises an anti-aging agent, an ultraviolet-proof agent and a flame retardant.

The printed and embossed white PVC tablecloth is prepared according to the production process of the printed and embossed white PVC tablecloth of any one of claims 1 to 9, and is 0.18 mm to 0.35 mm in overall thickness and 130cm to 155 cm in width.

The invention has the beneficial effects that:

1. on one hand, the production process is simple, the integration degree of production equipment is high, the production efficiency is high, the production cost is low, and the method is suitable for large-scale mass production. In the second aspect, the white printed and embossed PVC tablecloth disclosed by the invention is white in ground color, gives consumers a white and flawless feeling, is white and elegant, clear in texture, strong in quality and sensibility, exquisite in pattern, comfortable in hand feeling, environment-friendly, non-toxic, pressure-resistant, strong in acid and alkali resistance, strong in anti-aging market competitiveness, large in market space and wide in market sale prospect. Compared with the traditional transparent PVC tablecloth, the tablecloth has higher brightness, more prominent printing and embossing, fuller and richer colors and better decorative effect under the contrast of white ground color.

2. The white PVC base layer is prepared from PVC resin powder serving as a main raw material, a plasticizer dioctyl phthalate, a softening agent calcium carbonate filler, an OBSH foaming agent for promoting PVC resin powder foaming, natural rubber and paraffin for improving PVC resin calendaring formability, a heat stabilizer for improving PVC thermal stability, a color powder for changing color and the like, and has the advantages of softness, comfort, closed-cell foaming, no central coking during foaming, good thermal stability, good plasticity, good calendaring formability, good mechanical property and the like. The OBSH foaming agent is exothermic for a short time, does benefit to control thick-layer PVC obturator foaming, and center coking when avoiding foaming produces the impressed watermark more easily, colors more easily when carrying out impressed watermark, printing and laminating, and the pattern on the product is more clear more showing.

3. In the raw material of the white PVC base layer, the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in the weight ratio of 0.5-1.5: 1. By controlling the particle size of the light calcium carbonate to be 10-50 mu m, the crystal structure and the surface electronic structure of the light calcium carbonate are changed, and the quantum size effect, the small size effect, the surface effect and the macroscopic quantum effect which are not possessed by the common heavy calcium carbonate are generated, so that the light calcium carbonate has good toughening and reinforcing effects, and can improve the bending strength, the bending elastic modulus, the thermal deformation temperature and the dimensional stability by adding the light calcium carbonate into the PVC resin; the good compatibility of the filling agent and the resin is the key for playing the role and controlling the addition amount, and the light calcium carbonate modified by the higher fatty acid salt can improve the compatibility of the light calcium carbonate and the PVC resin, thereby improving the strength of the material and leading the mechanical property of the prepared tablecloth to be better. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and combines the main heat stabilizer and the auxiliary heat stabilizer, so that the material has excellent heat stability and high-efficiency weather resistance, and can have good dispersibility, compatibility and processing fluidity in the processing process, thereby ensuring that the processed foaming material has better integral uniformity and consistency.

4. The preparation method of the white PVC base layer is prepared by adopting modes of twice plasticizing, calendaring molding, cooling and shaping and the like, and is matched with the selection of raw materials, so that various properties of the prepared white PVC base layer are more excellent.

5. The oil content of the PVC resin powder is controlled to be 45-55 Pa, the thickness of the white PVC base layer is 0.25-0.27 mm, the embossing and transfer printing effects of the PVC layer with the thickness are good, the PVC base layer is prevented from being damaged by stress caused by an embossing roller due to too thin PVC, and the edges of the PVC are aged due to high temperature during transfer printing. If the PVC base is too thick, the whole thickness of the tablecloth is large, the requirements of lightness, thinness and softness cannot be met, and when the PVC base is too thick, the embossing is shallow, the patterns are not prominent, and the decorative effect is not strong.

6. In S1, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high temperature resistant layer is the high barrier nature film, and it sets up the high temperature resistant effect that has increased the tablecloth, prevents that tablecloth surface molecular structure from being destroyed when the high temperature laminating. The pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and during printing, printing ink is stirred by ink stirring rods every 2-4 min and printing solvents are added, the ink stirring rods rotate orderly and uniformly during working, and the printing nesting tolerance during the pattern printing process is +/-1 mm; by adopting the printing parameter settings, the printing speed is high, the coloring is uniform and stable, the ink adhesiveness is good, the printing alignment is accurate, the printed pattern position is accurate, and the decorative effect is better. The printing group is additionally provided with a high-temperature 8M foaming oven, and the temperature of the oven can be raised to 120-280 ℃, so that PVC can be fully foamed by heat, and the flexibility of the tablecloth is further improved.

7. The formula of the aqueous release agent layer comprises 55% of deionized water, 35% of modified aqueous acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent by weight.

8. In S2, during the embossing process, the embossing roller frozen water circulation, the temperature of 7 ℃, the pressure of 8 kg/cm and the rotating speed of 15m/min can be manually adjusted to move left and right by 10 mm-20 mm and swing up and down by 8 mm-15 mm. Make the white PVC basic unit after the impressed watermark cool off gradually, the impressed watermark shaping effect is better, and the setting of rotational speed and pressure simultaneously makes whole production technology keep different sections synchronous, and production efficiency is high. The embossing roller capable of being manually adjusted is provided with a mechanism which is beneficial to ensuring accurate registration of subsequent embossing patterns and printed patterns.

9. In the laminating and transferring processes, two layers of laminating are carried out through two laminating devices, so that the laminating effect of the two layers is better, the embossing effect is accurate in alignment, the obvious third dimension of the layers is strong, and the patterns of the two layers can be accurately positioned. The internal structure of the material is changed through multiple times of high temperature and cooling, the pattern of the product is prevented from fading, and the color fastness of the product is higher.

10. After the two are jointed by two transfer printing, the two are heated, so that the connection between the two is firmer, and the product has good three-dimensional effect.

11. And S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern. The embossing pattern and the printing pattern are perfectly matched, and the patterns on the tablecloth are clearer and fuller, the stereoscopic impression is stronger, and the decorative effect is better.

12. In S5, in the winding process, pressures of a rubber winding roller, a silicone winding roller and a bending winding roller are all 3 kg/4 kg/cm, winding traction tension is 2.5 kg/3.5 kg/cm, and winding speed is 10 m/min-25 m/min. In the whole production process, the speed of the rolling process and other processes is synchronous, so that the production process of the product is carried out stably and efficiently.

13. S1, when a white PVC base layer is manufactured, the white PVC base layer comprises 65 parts of dioctyl phthalate, 58 parts of PVC resin powder, 70 parts of calcium carbonate filler, 3 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1 part of paraffin, 0.15 part of heat stabilizer, 0.25 part of titanium dioxide and 0.1 part of processing aid in parts by mass; the processing aid comprises an anti-aging agent, an ultraviolet-proof agent and a flame retardant. The PVC raw material adopting the formula has the advantages of appropriate dosage of each component, good product plasticity, high flexibility, softness, comfort and good ductility.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1:

the production process of the printed and embossed white PVC tablecloth comprises the following steps: s1: preparing a white PVC base layer and a printing film; s2: embossing, namely adopting an embossing roller to carry out calendering on the surface of the white PVC base layer to obtain an embossing pattern; s3: attaching and transferring, namely attaching the printing film to the white PVC base layer at high temperature, and transferring the printing pattern on the printing film to the white PVC base layer; s4: and (6) rolling.

In S1, when the white PVC base layer is manufactured, the PVC base layer comprises 65 parts by weight of dioctyl phthalate, 58 parts by weight of PVC resin powder, 70 parts by weight of calcium carbonate filler, 3 parts by weight of OBSH foaming agent, 2.5 parts by weight of natural rubber, 1 part by weight of paraffin, 0.15 part by weight of heat stabilizer, 0.25 part by weight of titanium dioxide and 0.1 part by weight of processing aid in S1; the processing aid comprises an anti-aging agent, an ultraviolet-proof agent and a flame retardant.

The calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

The manufacturing method of the white PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a white PVC base layer; the oil content of the PVC resin powder is controlled between 45 Pa and 55 Pa, and the thickness of the white PVC base layer is 0.25mm to 0.27 mm.

In S1, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass. The pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and during printing, printing ink is stirred by ink stirring rods every 3min and printing solvent is added, the ink stirring rods rotate orderly and uniformly during working, and the printing nesting tolerance during the pattern printing process is +/-1 mm. A high-temperature 8M foaming oven is additionally arranged on the printing group, and the temperature of the oven can be raised to 120-280 ℃, so that PVC can be fully foamed by heat.

In S2, during the embossing process, the embossing roller frozen water circulation, the temperature of 7 ℃, the pressure of 8 kg/cm and the rotating speed of 15m/min can be manually adjusted to move left and right by 10 mm-20 mm and swing up and down by 8 mm-15 mm.

In S3, the attaching and transferring process comprises a first attaching device and a second attaching device, the temperature of the first attaching device is 135 ℃, the rotating speed of a preheating roller is 8m/min, the traction tension is 3 kg/cm, and the coiling speed is 75 m/min; the temperature of a cooling roller of the first laminating device is 9 ℃, the width shrinkage is less than or equal to 1cm, the rotating speed is 12RPM/min, the low-speed rotating speed is 8RPM/min, and the high-speed printing speed is 125 RPM/min; the temperature of the second laminating device is 185 ℃, the laminating time is 45s, the traction tension is 3.5 kg/cm, the coiling speed is 25m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 5 ℃, the cooling group is cooled and shaped for four times, the temperature of each group is increased by 3 ℃ in sequence, and the linear speed control of the cooling group is synchronous with the embossing rollers.

In S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat for operation, the vat operation temperature is 200 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 20 cm-30 cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conduction oil closed circulation.

In S5, in the winding process, the pressures of the rubber winding roller, the silica gel winding roller and the bending winding roller are all 3.5 kg/cm, the winding traction tension is 3 kg/cm, and the winding speed is 25 m/min.

The printed and embossed white PVC tablecloth is prepared by the production process of the printed and embossed white PVC tablecloth according to any one of claims 1 to 9, and is 0.25mm in overall thickness and 130cm to 155 cm in width.

Example 2:

the production process of the printed and embossed white PVC tablecloth comprises the following steps: s1: preparing a white PVC base layer and a printing film; s2: embossing, namely adopting an embossing roller to carry out calendering on the surface of the white PVC base layer to obtain an embossing pattern; s3: attaching and transferring, namely attaching the printing film to the white PVC base layer at high temperature, transferring the printing pattern on the printing film to the white PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s4: and (6) rolling.

And S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern.

Example 3:

In S1, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

Example 4:

Example 5:

S1, when the white PVC base layer is manufactured, the white PVC base layer comprises 61 parts of dioctyl phthalate, 69 parts of PVC resin powder, 66 parts of calcium carbonate filler, 3.7 parts of OBSH foaming agent, 0.05 part of heat stabilizer, 0.16 part of toner and 0.09 part of processing aid by mass. The calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1.

The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

And (4) analyzing results:

the physical and chemical properties of the tablecloths produced in the examples 1 to 5 are comprehensively evaluated, and the tablecloth in the example 1 is found to have the optimal properties, and the specific reasons are analyzed as follows;

compared with the embodiment 1, the embodiment 2 has the advantages that the patterns on the tablecloth are not clear, the color is not full, the three-dimensional effect is not achieved, and the problems of embossing and pattern non-correspondence are solved. This is because in example 2, the embossed pattern and the printed pattern are not precisely registered by the registration of the embossed pattern and the printed pattern during the transfer and application process.

Compared with the example 1, the patterns on the surface of the tablecloth are uneven, the colors are not bright, the ink is not fully colored, the patterns are not vivid enough, and the patterns are easy to lose shape at high temperature and high pressure. This is because in example 3, the ink was not continuously stirred during printing, and a foaming oven was not added.

Example 4 compared with example 1, in example 4, the prepared tablecloth after embossing has poor clean brightness and refraction effect, because the product after embossing is not cooled and shaped by adopting frozen water circulation in the embossing stage, and the large bathtub is not heated and cooled and shaped after transfer and attachment, the embossing is not clear enough, and the clean brightness and refraction effect after embossing are poor.

Example 5 compared to example 1, the tablecloth of example 5 was poor in softness and plasticity and poor in ductility due to the higher PVC content, the low plasticizer and filler content, and the absence of natural rubber and paraffin wax in the PVC formulation of example 5.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The production process of the printed and embossed white PVC tablecloth is characterized in that: the method comprises the following steps: s1: preparing a white PVC base layer and a printing film; s2: embossing, namely adopting an embossing roller to carry out calendering on the surface of the white PVC base layer to obtain an embossing pattern; s3: attaching and transferring, namely attaching the printing film to the white PVC base layer at high temperature, transferring the printing pattern on the printing film to the white PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s4: and (6) rolling.

2. The process for producing printed embossed white PVC tablecloth according to claim 1, wherein the embossing comprises the following steps: s1, when a white PVC base layer is manufactured, the white PVC base layer comprises, by mass, 35-75 parts of dioctyl phthalate, 20-80 parts of PVC resin powder, 50-80 parts of calcium carbonate filler, 2-5 parts of OBSH foaming agent, 2-3 parts of natural rubber, 1-3 parts of paraffin, 0.02-0.3 part of heat stabilizer, 0.02-0.3 part of titanium dioxide and 0.01-0.2 part of processing aid; the manufacturing method of the white PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a white PVC base layer; the oil content of the PVC resin powder is controlled between 45 Pa and 55 Pa, and the thickness of the white PVC base layer is 0.25mm to 0.27 mm.

3. The process for producing printed embossed white PVC tablecloth according to claim 2, wherein the embossing comprises the following steps: in S1, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

4. The process for producing printed embossed white PVC tablecloth according to claim 3, wherein the embossing comprises the following steps: in S2, in the embossing process, embossing roller frozen water circulates, the temperature is 6-8 ℃, the pressure is 7.5 kg/cm-8.5 kg/cm, the rotating speed is 10-25 m/min, 10-20 mm can be moved left and right and 8-15 mm can be swung up and down through manual adjustment.

5. The process for producing printed embossed white PVC tablecloth according to claim 4, wherein the embossing comprises the following steps: in S3, the laminating and transferring process comprises a first laminating device and a second laminating device, the temperature of the first laminating device is 120-150 ℃, the rotating speed of a preheating roller is 7 m/min-9 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the coiling speed is 60 m/min-90 m/min; the temperature of a cooling roller of the first laminating device is 8-10 ℃, the breadth shrinkage is less than or equal to 1cm, the rotating speed is 7-17 RPM/min, the low-speed rotating speed is 3-13 RPM/min, and the high-speed printing speed is 15-25 RPM/min; the temperature of the second laminating device is 180-190 ℃, the laminating time is 40-45 s, the traction tension is 3.0-4.0 kg/cm, the coiling speed is 20-25 m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 2-8 ℃, the cooling group is cooled and shaped for four times, the linear speed of each group is increased by 2-3 ℃ in sequence, and the cooling group is synchronized with the embossing rollers.

6. The process for producing printed embossed white PVC tablecloth according to claim 5, wherein the embossing comprises the following steps: in S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat for operation, the vat operation temperature is 180-200 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 20-30 cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conduction oil closed circulation.

7. The process for producing printed embossed white PVC tablecloth according to claim 6, wherein the embossing comprises the following steps: and S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern.

8. The process for producing printed embossed white PVC tablecloth according to claim 7, wherein the embossing comprises the following steps: in S5, in the winding process, pressures of a rubber winding roller, a silicone winding roller and a bending winding roller are all 3 kg/4 kg/cm, winding traction tension is 2.5 kg/3.5 kg/cm, and winding speed is 10 m/min-25 m/min.

9. The process for producing printed embossed white PVC tablecloth according to claim 8, wherein the embossing comprises the following steps: s1, when a white PVC base layer is manufactured, the white PVC base layer comprises 65 parts of dioctyl phthalate, 58 parts of PVC resin powder, 70 parts of calcium carbonate filler, 3 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1 part of paraffin, 0.15 part of heat stabilizer, 0.25 part of titanium dioxide and 0.1 part of processing aid in parts by mass; the processing aid comprises an anti-aging agent, an ultraviolet-proof agent and a flame retardant.

10. Printing impressed watermark white PVC tablecloth, its characterized in that: the production process of the printed and embossed white PVC tablecloth according to any one of claims 1 to 9, wherein the overall thickness is 0.18 mm to 0.35 mm, and the width is 130cm to 155 cm.