CN104675046A - Foamed wallpaper and production technology thereof - Google Patents
Foamed wallpaper and production technology thereof Download PDFInfo
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- CN104675046A CN104675046A CN201510068658.0A CN201510068658A CN104675046A CN 104675046 A CN104675046 A CN 104675046A CN 201510068658 A CN201510068658 A CN 201510068658A CN 104675046 A CN104675046 A CN 104675046A
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Abstract
The invention discloses foamed wallpaper and a production technology thereof. The foamed wallpaper comprises a substrate, a plastic thin layer arranged on the surface of the substrate and a destaticizing layer, wherein the destaticizing layer is arranged between the plastic thin layer and the substrate and is one of an anti-static film layer or an anti-static powder coating layer, and the plastic thin layer is a foaming layer which is subjected to saturation foaming by super-critical gas. In addition, the super-critical gas is used for carrying out physical foaming during the production of the foamed wallpaper, and thus a forming technology of the foamed wallpaper has the advantages of less control factors, concise operation, good foaming quality, no pollution, high raw material cyclic utilization rate, large selectable range of plastic raw materials and the like.
Description
Technical field
The present invention relates to a kind of foam composite material and production technology thereof, particularly a kind of foaming wallpaper and production technology thereof.
Background technology
Advantage the liking more and more by people such as wallpaper is a kind of widely used indoor wall ornament materials, decorative effect elegant strong with rich color, skin texture texture.Existing wallpaper has plastic wallpaper, pure paper wallpaper, metal wallpaper, yarn fabric wallpaper etc.And wherein the plastic wallpaper market share of occupying is maximum, it is divided into again common wallpaper and foaming wallpaper.Existing foaming wallpaper technique, be generally only limitted to PVC foam wallpaper, kind is single.Existing foaming PVC wallpaper adopts chemical blowing process in producing, and the CBA used, is unfavorable for environmental protection, and because the decomposition of CBA is incomplete, has residue, unfavorable for product properties.Along with epoch and technical development, physical blowing agent (carbon dioxide and the nitrogen) advantage of lower cost that physical blowing method uses, again can be fire-retardant, pollution-free, and noresidue after physical blowing agent foaming, little on the impact of foamed plastic performance, physical blowing method is more come in actual production.
Summary of the invention
For solving the problem, the invention discloses a kind of foaming wallpaper and production technology thereof, wallpaper structure is simple, fastness and good stability, safety easy to use, with supercritical gas carry out physical blowing in producing simultaneously, make the moulding process of foaming wallpaper have governing factor few, operate terse, foaming quality is good, pollution-free, feedstock circulation utilization rate is high, the advantage of the large grade of plastic raw materials range of choices.
Foaming wallpaper disclosed by the invention, comprise ground, be arranged on the plastic sheet of surface of bottom material and destatic layer, destaticing layer is arranged between plastic sheet and ground, it is arbitrary in antistatic rete or powder for antistatic coat for destaticing layer, and plastic sheet is the foaming layer through the saturated foaming of supercritical gas.
The one of foaming wallpaper disclosed by the invention is improved, and foaming wallpaper also comprises printed layers, and printed layers is arranged on the side that plastic sheet is positioned at and destatics layer side.
The one of foaming wallpaper disclosed by the invention is improved, and foaming wallpaper also comprises embossed layers, and embossed layers is arranged on plastic sheet away from destaticing on the side of layer side.(embossed layers can be set up another one deck also can be that direct embossing is on plastic sheet)
The production technology of foaming wallpaper disclosed by the invention comprises the steps,
S1, overcritical saturated: gas permeable material and plastic sheet are overlapped into raw material, after raw material being put into the controlled high-pressure bottle of temperature and pressure, pass into supercritical gas to high-pressure bottle and keep preset temperature and preset pressure, making raw material saturated a period of time t in supercritical gas; (gas permeable material carries out recycle and reuse, participates in regenerative ratio, crosses ground in sticker cloth operation as follow-up, or participates in overcritical saturated operation production next time as gas permeable material)
S2, unload foam: the raw material after step S1 is saturated are separated gas permeable material and plastic sheet after taking out with constant release speed release, and by plastic sheet foamable;
S3, finishing destatic: the plastic sheet after the foaming obtained by step S2 carries out elimination Electrostatic Treatment again after inspection, oven dry, finishing; The difference of foam pattern, the mode of oven dry is also different, can first the moisture content of material surface or oil content be wiped off with wiper, dry the mode mainly for water-bath foaming and oil bath foaming, in order to remove portion of water in material or oil content, simultaneously can softener material, facilitate smoothening material.Finally need the material after to leveling to test, reduce the irregular part in edge of material, be also to cut out required base material specification simultaneously.Elimination electrostatic can prevent sticking problem when printing, and is beneficial to next step printing.
S4, post processing: the plastic sheet after the elimination Electrostatic Treatment obtained by step S3 obtains foaming wallpaper finished product after printing decorative pattern, excessively sticker cloth, embossing and cutting edge finishing.Cross sticker cloth and constantly kiss-coating is carried out to the back side of the material after printing, laminating stickup is carried out in kiss-coating face and preprepared ground (non-woven fabrics, pore gauze or non-woven paper etc.) or utilizes other technique the material after printing and ground to be fitted, finally deliver to calender lamination on rolling equipment firm, the size of material is shaped.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and in S1, gas permeable material is nonwoven cloth material or pore gauze material or non-woven paper material.Use the non-woven fabrics of good permeability or pore gauze or non-woven paper material, be conducive to supercritical gas in step 2 and infiltrate the inside of plastic tab better and quickly, shorten gas saturation time, and make foaming effect better.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and in S1, the material of plastic sheet is the one in PP, PVC, PET.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and in S1, supercritical gas is CO
2supercritical gas or N
2one in supercritical gas.Gas is pollution-free, be the component of air, can recycle, and recovery difficult be lower equally, and the transition temperature of critical point and pressure is all not high, and application difficulty is relatively low.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and the preset temperature that in S1, supercritical gas keeps is 25 DEG C-70 DEG C, and preset pressure is 8-20MPa.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and in S1, the saturation time t of raw material in supercritical gas is 6-24 hours.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and the raw-material release velocity interval after saturated in S2 is: be greater than 0MPa/min, be less than or equal to 15MPa/min.Adopt uniform and stable speed release, the formation of fine and closely woven uniform bubble core can be promoted, utilize and form the consistent bubble structure of stable and uniform in the material of plastic sheet.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and add heat utilization baking oven or water-bath heater or oil bath firing equipment, and the temperature of heating is 60 DEG C-90 DEG C in S2.Convenience according to different demands and subsequent technique can select different foam pattern.Foaming process is a process of freely growing up, and the length of material and width is carried out to traction to a certain degree and is contributed to being formed more regular material after trimming of testing, facilitates following process.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and the mode eliminating electrostatic in S3 can be cover one deck electrostatic prevention film on plastic sheet, also can be to be coated with one deck anti-static coating (as powder for antistatic etc.) on plastic sheet surface.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, and in S4, printing is carried out for adopting spray-drawing machine or UV printing machine or transfer printing machine or screen printer.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, the mode of embossing in S4 is roller embossing or dull and stereotyped embossing, can be all cold pressing or hot pressing when simultaneously no matter roller embossing or dull and stereotyped embossing, the mold temperature wherein during hot pressing be between 30 DEG C-80 DEG C.
The one of the production technology of foaming wallpaper disclosed by the invention is improved, cross sticker cloth technique in S4 to refer to and cross glue at material surface and fit with pre-prepd non-woven fabrics firmly, also can be use other techniques to make material and non-woven fabrics laminating firmly (such as: superb ripple laminating, or add thermal-adhering etc.), both can complete before printing, also can complete after printed pattern.
Foaming forming technique of the present invention is a kind of supercritical gas physics micropore foaming forming technique.Its basic process goods is put into the closed container that can bear high pressure, then be filled with supercritical gas (CO
2or N
2), utilize high fluidity and the dissolubility of supercritical gas, make plastic sheet under uniform temperature and pressure by supercritical gas institute saturation.Make the gas in polymer reach oversaturated state again by being rapidly heated.Due to the supercritical gas instability thermodynamically of dissolving in plastic sheet, make to be formed in polymeric system the nuclei of bubbles of fine and closely woven while being heated (in even release and easily formed) in a large number, then grow up through abscess and shape, thus prepare microporous foam goods.This foam process, Controlling Technology factor is few, and foaming quality is good, almost can carry out fretting map process for the plastics of the existing overwhelming majority.In addition, not only can the plastics scope of wider selection wallpaper, be no longer confined to existing PVC material, and the environment pollution of chemical blowing process and the unmanageable shortcoming of foaming quality can be avoided.
Accompanying drawing explanation
The structural representation of a kind of embodiment of Fig. 1, foaming wallpaper disclosed by the invention;
The process chart of a kind of embodiment of the production technology of Fig. 2, foaming wallpaper disclosed by the invention.
Reference numerals list:
1, ground; 2, plastic sheet; 3, layer is destaticed.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, following detailed description of the invention should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
As shown in Figure 1, foaming wallpaper disclosed by the invention, comprise ground, be arranged on the plastic sheet of surface of bottom material and destatic layer, destaticing layer is arranged between plastic sheet and ground, it is arbitrary in antistatic rete or powder for antistatic coat for destaticing layer, and plastic sheet is the foaming layer through the saturated foaming of supercritical gas.
Preferred as one, foaming wallpaper also comprises printed layers, and printed layers is arranged on the side that plastic sheet is positioned at and destatics layer side.
Preferred as one, foaming wallpaper also comprises embossed layers, and embossed layers is arranged on plastic sheet away from destaticing on the side of layer side.
As shown in Figure 2, the production technology of foaming wallpaper disclosed by the invention comprises the steps,
S1, overcritical saturated: gas permeable material and plastic sheet are overlapped into raw material, after raw material being put into the controlled high-pressure bottle of temperature and pressure, pass into supercritical gas to high-pressure bottle and keep preset temperature and preset pressure, making raw material saturated a period of time t in supercritical gas;
S2, unload foam: the raw material after step S1 is saturated are separated gas permeable material and plastic sheet after taking out with constant release speed release, and by plastic sheet foamable;
S3, finishing destatic: the plastic sheet after the foaming obtained by step S2 carries out elimination Electrostatic Treatment again after inspection, oven dry, finishing;
S4, post processing: the plastic sheet after the elimination Electrostatic Treatment obtained by step S3 obtains foaming wallpaper finished product after printing decorative pattern, excessively sticker cloth, embossing and cutting edge finishing.
Preferred as one, in S1, gas permeable material is nonwoven cloth material or pore gauze material.
Preferred as one, in S1, the material of plastic sheet is the one in PP, PVC, PET.
Preferred as one, in S1, supercritical gas is CO
2supercritical gas or N
2one in supercritical gas.
Preferred as one, the preset temperature that in S1, supercritical gas keeps is 25 DEG C-70 DEG C, and preset pressure is 8-20MPa.
Preferred as one, in S1, the saturation time t of raw material in supercritical gas is 6-24 hours.
Preferred as one, the raw-material release velocity interval after saturated in S2 is: be greater than 0MPa/min, be less than or equal to 15MPa/min.
Preferred as one, add heat utilization baking oven or water-bath heater or oil bath firing equipment in S2, and the temperature of heating is 60 DEG C-90 DEG C.
Preferred as one, the mode eliminating electrostatic in S3 can be cover one deck electrostatic prevention film on plastic sheet, also can be to be coated with one deck anti-static coating (as powder for antistatic etc.) on plastic sheet surface.
Preferred as one, in S4, printing is carried out for adopting spray-drawing machine or UV printing machine or transfer printing machine or screen printer.
Preferred as one, the mode of embossing in S4 is roller embossing or dull and stereotyped embossing, simultaneously no matter roller embossing or dull and stereotyped embossing time can be all cold pressing or hot pressing, the mold temperature wherein during hot pressing is between 30 DEG C-80 DEG C.
Preferred as one, cross sticker cloth technique in S4 to refer to and cross glue at material surface and fit with pre-prepd non-woven fabrics firmly, also can be use other techniques to make material and non-woven fabrics laminating firmly (such as: superb ripple laminating, or add thermal-adhering etc.), both can complete before printing, also can complete after printed pattern.Non-woven fabrics great majority are that fiber great majority are longer with chemical fibre or PEF particle for raw material, papermaking generally be string, also shorter, generally below three millimeters.
Embodiment 1
1. PP thin slice (plastic sheet 2) thick for 0.3mm and the thick PP non-woven fabrics of 0.2mm are carried out being overlapped into raw material, and rolling rolling (in order to improve space efficiency utilization and ensure enough permeable gaps, lower same), the length of often rolling up is 7m, and width is 450mm.
2. the raw material of rolling are put into a regulatable high-pressure bottle of temperature and pressure, then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 12Mpa, temperature is 32 DEG C, makes raw material in supercritical CO 2 saturated 6 hours;
3. then with the decompression rate removal pressure of 3MPa/min, take out raw material, be separated by PP thin slice with non-woven fabrics, saturated PP thin slice puts into the equipment heating 70 DEG C in advance, carries out foaming process 10s.
4. the PP thin slice after foaming carries out trimming process, then carry out 90 DEG C and dry softening leveling process, puts in storage finally by inspection cutting and packing clot.
5. the superimposed one deck electrostatic prevention film of one side of the PP thin slice after packing, then puts to screen printer at this face printing base colour decorative pattern.And by the another side of PP thin slice after printing and pre-prepd ground 1(non-woven fabrics) utilize superb ripple hot pressing to fit, and jail, sizing are pasted in roll-in, finally carry out clot and are distributed into blank.
6. blank is delivered on roller emebosser and carry out embossing (employing is colded pressing or hot pressing, and hot pressing temperature during hot pressing is 45 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.7m, thickness 0.5mm.
Embodiment 2:
1. PVC thin slice (plastic sheet 2) thick for 0.5mm and the thick PP non-woven paper of 0.15mm are carried out being overlapped into raw material, and rolling rolling, the length of often rolling up is 6m, and width is 350mm.
2. the raw material of rolling are put into the adjustable high-pressure bottle of a temperature and pressure, then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 19Mpa, temperature is 42 DEG C, makes raw material in supercritical CO 2 saturated 24 hours.
3. then with the decompression rate removal pressure of 5MPa/min, take out raw material, be separated by PVC thin slice with non-woven paper, saturated PVC thin slice puts into the equipment heating 90 DEG C in advance, carries out foaming process 20s.
4. the PVC thin slice after foaming carries out trimming process, then carry out 60 DEG C and dry softening leveling process, puts in storage finally by cutting and packing clot.
5. the one side of the PVC thin slice after packing applies one deck powder for antistatic, then puts printing base colour to Ke's UV formula printing machine.And glue is crossed, by itself and pre-prepd ground 1(non-woven paper in the another side face of printing PVC thin slice) fit, and roll-in subsides are firm.
6. the material of laminating ground is delivered to and roller emebosser carries out embossing (employing is colded pressing or hot pressing, hot pressing temperature during hot pressing is 30 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.53m, thickness 0.8mm.
Embodiment 3:
1. PET thin slice (plastic sheet 2) thick for 0.5mm and the thick pore gauze of 0.15mm are carried out being overlapped into raw material, and rolling rolling, the length of often rolling up is 7.5m, and width is 400mm.
2. insulating material will be become to put into the adjustable high-pressure bottle of a temperature and pressure, and then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 8Mpa, temperature is 55 DEG C, makes raw material in supercritical CO 2 saturated 20 hours;
3. then with the decompression rate removal pressure of 9MPa/min, take out raw material, be separated by PET thin slice with pore gauze, saturated PET thin slice puts into the equipment heating 82 DEG C in advance, carries out foaming process 15s.
4. the PP thin slice after foaming carries out trimming process, then carries out 75 DEG C and dry softening leveling process, becomes base material and put in storage finally by cutting with packing clot.
5. the PP thin slice after packing puts printing base colour to spray drawing machine.And glue is crossed, by itself and pre-prepd ground 1(non-woven fabrics in the back side of PP thin slice after printing) fit, and roll-in paste firm, shape, finally carry out clot and be distributed into blank.
6. blank is delivered on dull and stereotyped emebosser and carry out continuous embossing (employing is colded pressing or hot pressing, and hot pressing temperature during hot pressing is 80 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.7m, thickness 0.8mm.
Embodiment 4
1. PP thin slice (plastic sheet 2) thick for 0.3mm and the thick PP non-woven fabrics of 0.2mm are carried out being overlapped into raw material, and rolling rolling (in order to improve space efficiency utilization and ensure enough permeable gaps, lower same), the length of often rolling up is 7m, and width is 450mm.
2. the raw material of rolling are put into a regulatable high-pressure bottle of temperature and pressure, then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 20Mpa, temperature is 25 DEG C, makes raw material in supercritical CO 2 saturated 10 hours;
3. then with the decompression rate removal pressure of 15MPa/min, take out raw material, be separated by PP thin slice with non-woven fabrics, saturated PP thin slice puts into the equipment heating 60 DEG C in advance, carries out foaming process 30s.
4. the PP thin slice after foaming carries out trimming process, then carry out 80 DEG C and dry softening leveling process, puts in storage finally by inspection cutting and packing clot.
5. the superimposed one deck electrostatic prevention film of one side of the PP thin slice after packing, then puts to screen printer at this face printing base colour decorative pattern.And by the another side of PP thin slice after printing and pre-prepd ground 1(non-woven fabrics) utilize superb ripple hot pressing to fit, and jail, sizing are pasted in roll-in, finally carry out clot and are distributed into blank.
6. blank is delivered on roller emebosser and carry out embossing (employing is colded pressing or hot pressing, and hot pressing temperature during hot pressing is 55 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.7m, thickness 0.5mm.
Embodiment 5:
1. PVC thin slice (plastic sheet 2) thick for 0.5mm and the thick PP non-woven paper of 0.15mm are carried out being overlapped into raw material, and rolling rolling, the length of often rolling up is 6m, and width is 350mm.
2. the raw material of rolling are put into the adjustable high-pressure bottle of a temperature and pressure, then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 17Mpa, temperature is 70 DEG C, makes raw material in supercritical CO 2 saturated 13 hours.
3. then with the decompression rate removal pressure of 0.01MPa/min, take out raw material, be separated by PVC thin slice with non-woven paper, saturated PVC thin slice puts into the equipment heating 75 DEG C in advance, carries out foaming process 25s.
4. the PVC thin slice after foaming carries out trimming process, then carry out 85 DEG C and dry softening leveling process, puts in storage finally by cutting and packing clot.
5. the one side of the PVC thin slice after packing applies one deck powder for antistatic, then puts printing base colour to Ke's UV formula printing machine.And glue is crossed, by itself and pre-prepd ground 1(non-woven paper in the another side face of printing PVC thin slice) fit, and roll-in subsides are firm.
6. the material of laminating ground is delivered to and roller emebosser carries out embossing (employing is colded pressing or hot pressing, hot pressing temperature during hot pressing is 75 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.53m, thickness 0.8mm.
Embodiment 6:
1. PET thin slice (plastic sheet 2) thick for 0.5mm and the thick pore gauze of 0.15mm are carried out being overlapped into raw material, and rolling rolling, the length of often rolling up is 7.5m, and width is 400mm.
2. insulating material will be become to put into the adjustable high-pressure bottle of a temperature and pressure, and then pass into the CO2 gas of supercriticality, the pressure in high-pressure bottle is remained 10Mpa, temperature is 63 DEG C, makes raw material in supercritical CO 2 saturated 20 hours;
3. then with the decompression rate removal pressure of 12MPa/min, take out raw material, be separated by PET thin slice with pore gauze, saturated PET thin slice puts into the equipment heating 67 DEG C in advance, carries out foaming process 17s.
4. the PP thin slice after foaming carries out trimming process, then carries out 63 DEG C and dry softening leveling process, becomes base material and put in storage finally by cutting with packing clot.
5. the PP thin slice after packing puts printing base colour to spray drawing machine.And glue is crossed, by itself and pre-prepd ground 1(non-woven fabrics in the back side of PP thin slice after printing) fit, and roll-in paste firm, shape, finally carry out clot and be distributed into blank.
6. blank is delivered on dull and stereotyped emebosser and carry out continuous embossing (employing is colded pressing or hot pressing, and hot pressing temperature during hot pressing is 65 DEG C), finally the material cutting edge clot after embossing is packaged into finished product, trimmed size: length: 10m, width 0.7m, thickness 0.8mm.
Antistatic material is conductive material, comprises metal or conduction high polymer etc.
The non-limit part of technical scope midrange that this place embodiment is protected application claims, equally all in the scope of protection of present invention.
Foaming wallpaper disclosed in this invention, there is light quality, good with metope stickiness, be convenient to cutting, and paper extension direction has good stretching and restorability (based on uniform microbubble structure, stress decay and restorative good, can recover fast after being subject to force-extension deformation), not yielding, not easily damage because repeatedly fitting in taping process, not easily go mouldy, rotproofness is good.Compared with commercially available foaming wallpaper, quality alleviates and reaches 10-15%.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also comprises the technical scheme be made up of above technical characteristic.The above is the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a foaming wallpaper, comprise ground and the plastic sheet being arranged on surface of bottom material, it is characterized in that: described foaming wallpaper also comprises and destatics layer, the described layer that destatics is arranged between plastic sheet and ground, the described layer that destatics is arbitrary in antistatic rete or powder for antistatic coat, and described plastic sheet is the foaming layer through the saturated foaming of supercritical gas.
2. foaming wallpaper according to claim 1, is characterized in that: described foaming wallpaper also comprises printed layers, and described printed layers is arranged on the side that plastic sheet is positioned at and destatics layer side.
3. foaming wallpaper according to claim 1 and 2, is characterized in that: described foaming wallpaper also comprises embossed layers, and described embossed layers is arranged on plastic sheet away from destaticing on the side of layer side.
4. foam the production technology of wallpaper, it is characterized in that: the production technology of described foaming wallpaper comprises the steps,
S1, overcritical saturated: gas permeable material and plastic sheet are overlapped into raw material, after raw material being put into the controlled high-pressure bottle of temperature and pressure, pass into supercritical gas to high-pressure bottle and keep preset temperature and preset pressure, making raw material saturated a period of time t in supercritical gas;
S2, unload foam: the raw material after step S1 is saturated are separated gas permeable material and plastic sheet after taking out with constant release speed release, and by plastic sheet foamable;
S3, finishing destatic: the plastic sheet after the foaming obtained by step S2 carries out elimination Electrostatic Treatment again after inspection, oven dry, finishing;
S4, post processing: the plastic sheet after the elimination Electrostatic Treatment obtained by step S3 obtains foaming wallpaper finished product after printing decorative pattern, excessively sticker cloth, embossing and cutting edge finishing.
5. the production technology of foaming wallpaper according to claim 4, is characterized in that: in described S1, gas permeable material is nonwoven cloth material or pore gauze material or non-woven paper material.
6. the production technology of foaming wallpaper according to claim 4, is characterized in that: in described S1, the material of plastic sheet is the one in PP, PVC, PET.
7. the production technology of foaming wallpaper according to claim 4, is characterized in that: in described S1, supercritical gas is CO
2supercritical gas or N
2one in supercritical gas.
8. the production technology of foaming wallpaper according to claim 4, is characterized in that: the preset temperature that in described S1, supercritical gas keeps is 25 DEG C-70 DEG C, and preset pressure is 8-20MPa.
9. the production technology of foaming wallpaper according to claim 4, is characterized in that: in described S1, the saturation time t of raw material in supercritical gas is 6-24 hours.
10. the production technology of foaming wallpaper according to claim 4, is characterized in that: the raw-material release velocity interval after saturated in described S2 is: be greater than 0MPa/min, be less than or equal to 15MPa/min.
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| CN105133436A (en) * | 2015-08-14 | 2015-12-09 | 桂林威迈壁纸有限公司 | Foaming wallpaper production process |
| CN105239464A (en) * | 2015-08-31 | 2016-01-13 | 雷斌 | Composite wallpaper and processing method of same |
| CN108928146A (en) * | 2016-11-29 | 2018-12-04 | 安徽紫荆花壁纸股份有限公司 | A kind of pattern multiplicity, coloury wall paper processing method |
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