CN101691717B - Mirror surface release paper for synthesizing leather - Google Patents
Mirror surface release paper for synthesizing leather Download PDFInfo
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- CN101691717B CN101691717B CN2009100755513A CN200910075551A CN101691717B CN 101691717 B CN101691717 B CN 101691717B CN 2009100755513 A CN2009100755513 A CN 2009100755513A CN 200910075551 A CN200910075551 A CN 200910075551A CN 101691717 B CN101691717 B CN 101691717B
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Abstract
The invention relates to mirror surface release paper for synthesizing leather, comprising a substrate and a release layer. A functional layer is arranged between the substrate and the release layer, and after the improvement, the functional layer is calendered at the temperature of 80-200 DEG C and the linear pressure of 80-150kN/m. The mirror surface release paper has the roughness profile arithmetical mean deviation Ra of less than 0.8 Mum, the micro roughness ten-point height Rz of less than 4.0 Mum and the glossiness of more than 90 percent at the 60-degree angle measured according to the ISO-2813 standard. The mirror surface release paper has high glossiness and the mirror surface effect.
Description
Technical field
The present invention relates to a kind of paper products, particularly a kind of synthetic leather release liners.
Background technology
The method of making synthetic leather has a variety of, wherein general a kind of method is: coating synthetic leather constituent on the leather release liners, for example urethane resin, vinyl chloride resin, polyamide and amino resins etc., make it dry or curing, on this constituent, be coated with binding agent then, paste fabric backing etc., by the leather release liners is peeled off the acquisition synthetic leather from the synthetic leather constituent.The synthetic leather of Zhi Zaoing in this way is that the surface state with the leather release liners copies on the synthetic leather, so can obtain the synthetic leather of apparent good, high glaze by the surface gloss of improving the apparent of leather release liners and improving the leather release liners.
At present, the technology of preparation leather release liners has multiple, as publication number is that the Chinese patent of CN101020378A is described, be that thermoplastic resins such as homopolymers, acrylic resin or amylene resinoid with alpha-olefin melt extrude and cover at least one face of supporter, by chill roll, be laminated to substrate surface then.Use the leather release liners of this fabrication techniques, have excellent embossing plastic property, in the manufacturing of the synthetic leather that uses bi-component curable PU, have good fissility and a reusability.But, because peel ply is made of thermoplastic resin, leather release liners poor heat resistance, the problem that existence can not be used in the PVC synthetic leather is made.
Publication number provides a kind of method for preparing antistatic leather release liners for the Chinese patent of CN1485387A, on the polishing coated paper smooth layer coating fluid that one deck is made up of alkyd resins and melamine resin is set, and solidify to form smooth layer; The peel ply coating fluid that one deck is made up of silicon modified alkyd resin and melamine resin is set on smooth layer again, solidify to form peel ply.Use the leather release liners of this method preparation to be widely used in the production of PU and PVC type synthetic leather, but this technology need be added antistatic agent to the having relatively high expectations of paper substrate in paper substrate, also need the polishing that feels secure, production process is many, the cost height.
Application number is for providing a kind of technology for preparing the leather release liners of low cost, high glaze in 200810079831.7 the Chinese patent, the multi-functional layer that coating one deck is made up of adhesive, water and surfactant on base material, on multi-functional layer, be coated with the release coating fluid of forming by alkyd modified silicones, melmac and acid catalyst, film-forming then.The leather release liners of using this method to prepare can be used for the production of PU and PVC type synthetic leather.But along with the leather release liners surface of increasing of reusing number of times produces orange peel phenomenon, glossiness reduces obviously, can't satisfy the production needs.
Summary of the invention
Technical problem to be solved by this invention is: a kind of glossiness height is provided, has the mirror surface release paper for synthesizing leather of mirror effect.
For addressing the above problem, the technical scheme that the present invention takes is:
A kind of mirror surface release paper for synthesizing leather, it comprises base material and release layer, is provided with the multi-functional layer of one deck between base material and release layer, described multi-functional layer is that 80-200 ℃, linear pressure are to be carried out press polish under the condition of 80-150kN/m to handle in temperature; The roughness profile arithmetic average error Ra of described mirror surface release paper＜0.8 μ m, 10 height of nao-and micro relief Rz＜4.0 μ m, the 60 degree angle glossiness that record according to ISO-2813 are more than 90%.
Above-mentioned mirror surface release paper for synthesizing leather, the component and the parts by weight thereof of described multi-functional layer are:
Inorganic particulate 30-80;
Adhesive 20-80;
Water 30-80;
Dispersant 1-8;
Surfactant 1-5;
Above-mentioned mirror surface release paper for synthesizing leather, the formation material of described release layer comprises alkyd modified silicones, melmac and acid catalyst;
Above-mentioned mirror surface release paper for synthesizing leather, the component and the parts by weight thereof of described multi-functional layer are:
Inorganic particulate 40-70;
Adhesive 30-70;
Water 40-70;
Dispersant 1-5;
Surfactant 1-3.
Above-mentioned mirror surface release paper for synthesizing leather, the inorganic particulate in the described multi-functional layer is one or more in kaolin, clay, calcium carbonate, talcum, the barium sulfate, the particle diameter of particle is 0.2-15 μ m.
Above-mentioned mirror surface release paper for synthesizing leather, the adhesive in the described multi-functional layer are one or more in benzene emulsion, styrene-butadiene emulsion, pure-acrylic emulsion, the Silicone acrylic emulsion.
Above-mentioned mirror surface release paper for synthesizing leather, the dispersant in the described multi-functional layer is inorganic dispersant or organic dispersing agent; Described dispersant is waterglass, calgon, Sodium Polyacrylate, methyl sodiosul foaliphatate or gelatin.
Above-mentioned mirror surface release paper for synthesizing leather, surfactant in the described multi-functional layer is anion surfactant, cationic surfactant or amphoteric surfactant, and described surfactant is dodecyl sodium sulfate, dodecyl benzyl dimethyl ammonium chloride or empgen BB.
As supporting the base material that multi-functional layer and release layer are used, can be the body paper of handling through coating, also can be clay coated paper, curtain coating coated paper.The specification of paper substrate does not have special requirement, preferred grammes per square metre between 150 to 200 grammes per square metres, the paper substrate between 150 microns to 200 microns of the thickness, their adopt known method manufacturing.Body paper is handled through multiple working procedure processing by timber and is formed, and is made of rough surface a large amount of xylons.The body paper rough surface is owing to exist the slit between the fiber, when directly being coated with release layer on body paper, can cause coating surface uneven, and the gloss homogeneity is poor; In addition, if directly be coated with release layer on the body paper base material, the release layer coating fluid can be penetrated into by the slit between xylon in the middle of the body paper, and this can cause the problem of peeling off difficulty in the synthetic leather process, the synthetic leather lustrous surface that finally makes is irregular, spottiness.In order to address the above problem, the present invention takes to be provided with multi-functional layer between base material and release layer.
Multi-functional layer has impermeable and level and smooth effect, and it has solved, and existing product thickness is big, production cost is high, reuse the limited shortcoming of number of times; The component and the parts by weight thereof of the multi-functional layer among the present invention are: inorganic particulate 30～80; Adhesive 20～80; Water 30～80; Dispersant 1～8; Surfactant 1～5; Preferably: inorganic particulate 40～70; Adhesive 30～70; Water 40～70; Dispersant 1～5; Surfactant 1～3.
Adhesive in the described multi-functional layer is one or more in benzene emulsion, styrene-butadiene emulsion, pure-acrylic emulsion, the Silicone acrylic emulsion.Adhesive forms fine and close film through being heating and curing, and can effectively intercept the osmosis of solvent to paper substrate; The film that adhesive forms also has good solvent resistance, solvent is applied the situation that can not occur the dissolved destruction film on it; In addition, adhesive coated on base material, the coarse state of substrate surface can be covered, the flatness of base material can be obviously improved.But owing to adhesive is using in the environment of long-term high heat, orange peel phenomenon can appear in surface meeting roughening.
In order to improve leather release liners repeat performance, eliminate orange peel phenomenon, in multi-functional layer coating fluid, added inorganic particulate.Inorganic particulate in the described multi-functional layer is one or more of kaolin, clay, calcium carbonate, talcum, barium sulfate etc., and the particle diameter of particle is 0.2-15 μ m.The adding of inorganic particulate changes the film forming institutional framework, produces laminated structure in the rete, and the inorganic particulate of sheet is stacked at substrate surface regularly, and making originally, coarse change face structure becomes smooth; In addition, the slit between the xylon can effectively be filled and cover to laminated structure, thereby effectively controlled the osmosis of adhesive by slit between the xylon.In addition, the adding of inorganic particulate effectively raises the viscosity of multi-functional layer coating fluid on the one hand and has reduced the surface tension of multi-functional layer coating fluid, has reduced being coated with the possibility that shrinkage cavity occurs, helps forming surface Paint Gloss; On the other hand, inorganic particulate has very strong heat resistance, and the phenomenon of apparent chap can not take place, and has guaranteed the repeated use of leather release liners.
Dispersant in the described multi-functional layer is inorganic dispersant or organic dispersing agent, the effect that adds dispersant, the one, help reducing material viscosity, make and the easier dispersion of multi-functional layer guarantee the dispersion homogeneity of inorganic particulate in multi-functional layer coating fluid, promptly, guarantee the fineness of coating, the fineness of indication coating, not clearly restriction is as long as no obvious bulky grain is assembled; The 2nd, help keeping the relative stability of dispersion, prevent the sedimentation of inorganic particulate.As preferably, the dispersant in the described multi-functional layer is waterglass, calgon, Sodium Polyacrylate, methyl sodiosul foaliphatate or gelatin.
In addition, for guaranteeing the dispersing uniformity of inorganic particulate in multi-functional layer coating fluid, the mode of high-speed stirred is adopted in the dispersion of inorganic particulate, utilizes the high shear forces of high-speed stirred to eliminate bulky grain, reduces the reunion of solids in the dispersion.
In order to produce good coating effect, also should add surfactant in the multi-functional layer coating fluid, on the one hand, the existence of surfactant can reduce the coating fluid surface energy, helps coating fluid to the wetting of base material with sprawl, the generation of the shrinkage cavity that prevents to film; On the other hand, can play the effect of the levelling of filming, make multi-functional layer more level and smooth.Very big as the optional scope of surfactant: as carboxylate (RCOO
-M
+), sulfonate (RSO
3 -M
+), sulfuric acid (ROSO
3 -M
+), phosphate (ROPO
3 -M
+) wait anion surfactant, wherein R is an alkyl, M is mainly alkali metal and ammonium ion; Quaternary ammonium salt (RNR
3'
+A
-), Fixanol (RC
5H
5N
+A
-), amine salt (R
nNH
m +A
-, n=1-3 m=1-3) waits cationic surfactant, and wherein A mainly is halogen and acid ion; Betaine (RN
+(CH
3)
2CH
2COO
-) wait amphoteric surfactant; Polyoxyethylene compounds (RO (C
2H
4O)
nH), multicomponent alcoholics compound (as the derivative of sucrose, D-sorbite, glycerine, ethylene glycol etc.), sulfoxide compound (RSOR '), amine oxide nonionic surface active agent such as (RNO); The silicon of type siloxane is surfactant.Preferred dodecyl sodium sulfate, dodecyl benzyl dimethyl ammonium chloride or empgen BB.
The thickness of multi-functional layer should be too not thin, and is too thin, do not have the effect of sealing release layer coating fluid; Can not be too thick, too thick, can cause the uneconomical of production, consume more heat.Usually as dried coating weight, preferred 1-50g/m
2, more preferably 5-45g/m
2, preferred especially 5-40g/m
2
The method that multi-functional layer is set on a surface of base material can be carried out as follows: inorganic particulate height under the dispersant booster action is stirred be dispersed in the water, stir, successively add a certain amount of adhesive and surfactant again, continue stirring and obtain multi-functional layer coating fluid composition, be coated on the face of base material, and make it dry.
Being coated with multi-functional layer of method that is adopted can use intaglio plate rubbing method, rod to be coated with known coating processes such as method, spraying process, method of spin coating, airblade coating method, rolling method, scraper rubbing method, door roller rubbing method, die head formula rubbing method.
In addition, as drying means, for example can adopt heated drying methods such as hot-air drying stove, infra-red drying, oil drying.Baking temperature does not have particular restriction, preferred 80-150 ℃, drying time preferred 30-300s
A lot of small holes are arranged in the dried rete of multi-functional layer coating, and the formed surface state of multi-functional layer that has these small holes can influence the surface state of release layer to a certain extent, causes the glossiness of final products to be difficult to get a promotion.Under certain temperature and pressure effect, the small hole in the rete is compressed, fills, and the coating surface tunic becomes smooth, and after making the functional layer coating film forming, a kind of effect of minute surface is arranged.In order to obtain this effect, the present invention has carried out the press polish processing to multi-functional layer, and the temperature that described press polish is handled is 80-200 ℃, and linear pressure is 80-150kN/m.The temperature that press polish is handled should not be too high or too low, when the temperature of handling when press polish is lower than 80 ℃, the elasticity deficiency of adhesive in the multi-functional layer, under pressure, the press polish effect a little less than; When temperature was higher than 200 ℃, adhesive very easily was bonded in press polish and rolls on, and coating is damaged, and too high temperature can cause damage to substrate fiber, made base material flavescence, hardening, became fragile.Equally, linear pressure causes the infringement of coating rete too greatly easily, and the toughness of multi-functional layer is reduced, and rete becomes fragile; Linear pressure is too little, is not enough to resist the elasticity of multi-functional layer itself, and the coating surface state can not get improving.
The press polish mode can be selected hard press polish or soft calendaring, the paper calender roll that the hard roller of press polish of hard press polish can adopt chilled iron roll or make with sulfate wood pulp, cotton, hair, fiber crops and asbestos etc.; Soft calendaring can adopt epoxy resin, nylon, synthetic rubber, polyester urethane etc. to be the soft pressure roller of main material.The heating of felt wrapped roll can utilize oily heat or Steam Heating, perhaps other mode of heatings.
Generally speaking, the multi-functional layer coating fluid component that is used for the leather release liners can also add antistatic agent and rheological agent.
Under the situation of not adding antistatic agent, the order of magnitude of the sheet resistance of multi-functional coating layer is 10
12Ω when making synthetic leather with the leather release liners that makes, along with increasing of access times, can influence the access times of leather release liners owing to produce the micro-crack that static causes release layer and synthetic leather, has shortened the service life of leather release liners greatly.In order to address this problem, need to add antistatic agent.As antistatic agent, can use the organic antistatic agent of polyvinyl alcohol, can also use inorganic anti-electrostatic agent such as sodium chloride, potassium chloride.
The addition of above-mentioned antistatic agent is 0.5 quality %-2.0 quality %, and when addition during less than 0.5 quality %, anti-static effect is not good; When addition during greater than 2.0 quality %, anti-static effect does not have anything to improve yet, and adds to cause raw-material waste, can increase cost simultaneously.
For the viscosity that makes multi-functional layer coating fluid is fit to coating, may in coating fluid, adds rheological agent and regulate viscosity.As rheological agent, can use organobentonite, aerosil etc.The addition of rheological agent is to be adjusted to suitable being as the criterion to the coating fluid viscosity.
Among the present invention, release layer provides the surface of sprawling of making synthetic leather, the surface state of release layer directly affects the surface state of synthetic leather, as obtaining the synthetic leather of high glaze, the surface of release layer should smoothly and have gloss, in addition, release layer should also provide the surface that synthetic leather is peeled off, and the quality of fissility directly affects yield rate and the cost that synthetic leather is produced.Existing technology is to use alkyd modified silicones, melmac, acid catalyst, solvent and inorganic particulate to make the release layer coating fluid, and the release layer surface of using this coating fluid to make is lackluster, and recessed prominent injustice.In order to reach the effect of high glaze, the present invention takes inorganic particulate is wherein removed, and the release layer of making has higher gloss.
Leather release liners release layer of the present invention is made by alkyd modified silicones, melmac, acid catalyst, solvent, is applicable to that the prescription of release layer of the present invention includes but not limited to following prescription:
Alkyd modified silicones 50
Melmac 50;
Acid catalyst 4.2;
Solvent 500;
Alkyd modified silicones is the film-forming resin in the system, mainly plays a part release.By containing alkyd modified silicones, when making synthetic leather with the leather release liners, easily this leather release liners and synthetic leather are peeled off in the release layer, in addition, also the feasible synthetic leather that is obtained is in apparent good order and condition.The consumption of alkyd modified silicones has certain restriction, and when its large usage quantity, the frictional resistance on leather release liners surface too reduces, and becomes the reason of leather release liners loose winding.And in the process of making synthetic leather, when being applied to the synthetic leather coating fluid on the leather release liners, the wettability of this coating fluid worsens, and makes coating fluid be difficult to coating.On the other hand, alkyd modified silicones consumption is crossed the young pathbreaker and is caused synthetic leather to peel off difficulty.
Melmac is the curing agent in the system, and main effect is that a plurality of alkyd modified silicones are linked up, and the alkyd modified silicones of linear structure is transformed into three-dimensional-structure, improves the crosslink density of release layer.By adding curing agent, can improve the heat-resisting quantity and the solvent resistance of release layer.The consumption of melmac also can not be excessive, and is big, then causes the release layer pliability poor.
Acid catalyst is mainly used in the amino-stoving varnish system, and its effect mainly contains: reduce solidification temperature; Shorten hardening time; Improve hardness, the gloss of coating; Improve moisture resistance and corrosion resistance; Improve the mechanical performance of coating.As acid catalyst can be p-methyl benzenesulfonic acid, DBSA, dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid.
Organic solvent as release layer uses can list aromatic hydrocarbons such as toluene, dimethylbenzene, aliphatic hydrocarbons such as hexane, heptane, octane, ketones such as Ketene dimethyl, butanone, diethyl ketone, cyclohexanone.Can use wherein a kind of separately, also can use the mixture more than 2 kinds.
The general preparation method of leather release liners release layer is: take by weighing solvent earlier, add acid catalyst again, be stirred well to acid catalyst and dissolve fully, add alkyd modified silicones, melmac at last and be stirred to dissolving fully, make the release layer coating fluid.The release layer coating fluid is coated on the multi-functional layer, and heating makes it to solidify.
The thickness of release layer should strict control.Too thin, in the process of making synthetic leather, release liners and synthetic leather are difficult for peeling off, and cause part easily; Too thick, the leather release liners is difficult for film-forming.Usually as dried coating weight, preferred 1-50g/m
2, more preferably 2-45g/m
2, preferred especially 4-40g/m
2
The coating method that peel ply adopted is similar to the method for the multi-functional layer of coating.
In addition, as drying means, for example can adopt heated drying methods such as hot-air drying stove, infra-red drying, oil drying.Baking temperature does not have particular restriction, preferred 100-200 ℃, drying time preferred 30-300s.
Leather release liners provided by the invention can prepare by following method:
Multi-functional layer is coated on the paper substrate, and heating makes its curing; Then release layer is coated on the multi-functional layer, is heating and curing.
10 height of the roughness profile arithmetic average error Ra of release liners and nao-and micro relief Rz is directly connected to the surface state of release liners, and its value is more little, and the surface state of release liners is smooth more, and glossiness is high more, and mirror effect is good more.
Compared with prior art, the present invention is 80-200 ℃ in temperature, linear pressure is under the condition of 80-150kN/m multi-functional layer have been carried out the press polish processing, reduced the small hole in the rete, make rete become smooth, obtain fine and close more level and smooth surface state, make the product of making have the gloss of mirror effect.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiment, but be not limited thereto.
The prescription of release layer:
Release layer of the present invention adopts following prescription:
Alkyd modified silicones 50;
Melmac 50;
Toluenesulfonic acid acid catalyst 4.2;
Butanone solvent 500;
Embodiment 1
The preparation of multi-functional layer coating fluid:
Kaolin 30;
Benzene emulsion 20;
Water 30;
Waterglass 1;
Dodecyl sodium sulfate 3;
Earlier the waterglass [Laiyang permanent letter chemical industry Co., Ltd] of 1 weight portion is poured in the water of 30 weight portions, stir, pour the kaolin [Maoming Silver Flower Kao Lin Clay Co., Ltd.'s model: YH-04] of 30 weight portions therein into, use high-speed stirred that it is uniformly dispersed, the benzene emulsion [German BASF model: 296DS solid content: 50%] that in scattered slurry, adds 20 weight portions, with glass bar solution is mixed, dodecyl sodium sulfate with 3 weight portions is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
On the asbestos base paper of 200 grammes per square metres, use the multi-functional layer of scraper coating coating fluid, 80 ℃ are heated 30 seconds film-formings down, 30 microns of thickness, then with the multi-functional layer after the film forming at 80 ℃, linear pressure 80KN/m carries out press polish and handles under the speed of a motor vehicle 10m/min condition, use a silk rod coating release layer then on the multi-functional layer after press polish is handled, 100 ℃ solidified 40 seconds, and 5 microns of thickness obtain the leather release liners.Carry out the test of glossiness and roughness afterwards.
Embodiment 2
The preparation of multi-functional layer coating fluid:
Clay 50;
Talcum powder 30;
Styrene-butadiene emulsion 40;
Benzene emulsion 40;
Water 30;
Calgon 5;
Dodecyl benzyl dimethyl ammonium chloride 2;
Earlier the calgon [the light organic material of Central-Southization of Hubei limited company] of 5 weight portions is poured in the water of 30 weight portions, stir, pour the talcum powder [the high-grade talcum powder of Haicheng City snowy peak factory] of 50 parts by weight of clay [Wal, Shenzhen nanotesla kind Materials Co., Ltd] and 30 weight portions therein into, use high-speed stirred that it is uniformly dispersed, in scattered slurry, add the styrene-butadiene emulsion [German Baeyer model: F2040 solid content: 50%] of 40 weight portions and the benzene emulsion [German BASF model: 296DS solid content: 50%] of 40 weight portions, with glass bar solution is mixed, dodecyl benzyl dimethyl ammonium chloride with 2 weight portions is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
On the art paper of 150 grammes per square metres, use the multi-functional layer of scraper coating coating fluid, 80 ℃ are heated 30 seconds film-formings down, 30 microns of thickness, then with the multi-functional layer after the film forming at 120 ℃, linear pressure 150KN/m carries out press polish and handles under the speed of a motor vehicle 10m/min condition, use a silk rod coating release layer at last on the multi-functional layer after press polish is handled, 100 ℃ solidified 40 seconds, and 10 microns of thickness obtain the leather release liners.Carry out the test of glossiness and roughness.
Embodiment 3
The preparation of multi-functional layer coating fluid:
Calcium carbonate 80;
Pure-acrylic emulsion 20;
Water 80;
Sodium Polyacrylate 2;
Empgen BB 5;
Earlier the Sodium Polyacrylate [vertical new material Science and Technology Ltd. model: the N-30 that hopes in Guangzhou] of 2 weight portions is poured in the water of 80 weight portions, stir, pour the calcium carbonate [Jiangxi Guang Yuan chemical industry Co., Ltd model: CC-2000] of 80 weight portions therein into, use high-speed stirred that it is uniformly dispersed, the pure-acrylic emulsion [German Baeyer model: F2040 solid content: 50%] that in scattered slurry, adds 20 weight portions, with glass bar solution is mixed, empgen BB with 5 weight portions is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
Use the multi-functional layer of scraper coating coating fluid on the asbestos base paper of 180 grammes per square metres, 80 ℃ are heated 30 seconds film-formings, 30 microns of thickness down.Then with the multi-functional layer after the film forming at 190 ℃, linear pressure 80KN/m carries out press polish and handles under the speed of a motor vehicle 10m/min condition, at last on the multi-functional layer after press polish is handled with a silk rod coating release layer, 100 ℃ solidified 40 seconds, 20 microns of thickness obtain the leather release liners.Then, carry out the test of glossiness and roughness.
Embodiment 4
The preparation of multi-functional layer coating fluid:
Kaolin 20;
Barium sulfate 10;
Silicone acrylic emulsion 60;
Pure-acrylic emulsion 20;
Water 30;
Methyl sodiosul foaliphatate 1;
Dodecyl sodium sulfate 1;
Earlier the methyl sodiosul foaliphatate [the rich petrochemical industry Co., Ltd of containing in Ningbo] of 1 weight portion is poured in the water of 30 weight portions, stir, pour the kaolin [Maoming Silver Flower Kao Lin Clay Co., Ltd.'s model: YH-04] of 20 weight portions and the barium sulfate of 10 weight portions [Shanghai jump river titanium white heavy chemicals Co., Ltd] therein into, use high-speed stirred that it is uniformly dispersed, in scattered slurry, add the Silicone acrylic emulsion [east, Beijing connection chemical industry solid content: 55%] of 60 weight portions and the pure-acrylic emulsion [German BASF model: PA237 solid content: 50%] of 20 weight portions, with glass bar solution is mixed, dodecyl sodium sulfate with 1 weight portion is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
On the asbestos base paper of 150 grammes per square metres, use the multi-functional layer of scraper coating coating fluid, 80 ℃ are heated 30 seconds film-formings down, 30 microns of thickness, then with the multi-functional layer after the film forming at 190 ℃, linear pressure 150KN/m carries out press polish and handles under the speed of a motor vehicle 10m/min condition, use a silk rod coating release layer at last on the multi-functional layer after press polish is handled, 100 ℃ solidified 40 seconds, and 30 microns of thickness obtain the leather release liners.Then, carry out the test of glossiness and roughness.
Embodiment 5
The preparation of multi-functional layer coating fluid:
Clay 20;
Calcium carbonate 10;
Talcum powder 10;
Styrene-butadiene emulsion 40;
Water 40;
Gelatin 8;
Empgen BB 3;
Earlier the gelatin [Luohe City Five Dragons gelatin Co., Ltd] of 8 weight portions is poured in the water of 40 weight portions, stir, pour 20 parts by weight of clay [Wal, Shenzhen nanotesla kind Materials Co., Ltd] therein into, the talcum powder of calcium carbonate of 10 weight portions [Jiangxi Guang Yuan chemical industry Co., Ltd model: CC-2000] and 10 weight portions [the high-grade talcum powder of Haicheng City snowy peak factory], use high-speed stirred that it is uniformly dispersed, the styrene-butadiene emulsion [German Baeyer model: F2040 solid content: 50%] that in scattered slurry, adds 40 weight portions, with glass bar solution is mixed, empgen BB with 3 weight portions is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
Use the multi-functional layer of scraper coating coating fluid on the art paper of 200 grammes per square metres, 80 ℃ are heated 30 seconds film-formings, 30 microns of thickness down.Then with the multi-functional layer after the film forming at 80 ℃, linear pressure 150KN/m carries out press polish and handles under the speed of a motor vehicle 10m/min condition, at last on the multi-functional layer after press polish is handled with a silk rod coating release layer, 100 ℃ solidified 40 seconds, 20 microns of thickness obtain the leather release liners.Then, carry out the test of glossiness and roughness.
Comparative Examples
The preparation of multi-functional layer coating fluid:
Clay 50;
Styrene-butadiene emulsion 40;
Benzene emulsion 20;
Water 50;
Calgon 5;
Dodecyl sodium sulfate 2;
Earlier the calgon [the light organic material of Central-Southization of Hubei limited company] of 5 weight portions is poured in the water of 50 weight portions, stir, pour 50 parts by weight of clay [Wal, Shenzhen nanotesla kind Materials Co., Ltd] therein into, use high-speed stirred that it is uniformly dispersed, in scattered slurry, add the styrene-butadiene emulsion [German Baeyer model: F2040 solid content: 50%] of 40 weight portions and the benzene emulsion [German BASF model: 296DS solid content: 50%] of 20 weight portions, with glass bar solution is mixed, dodecyl sodium sulfate with 2 weight portions is added on wherein again, continue to stir, make multi-functional layer coating fluid, stand-by.
Use the multi-functional layer of scraper coating coating fluid on the art paper of 150 grammes per square metres, 80 ℃ are heated 30 seconds film-formings down, and 30 microns of thickness are coated with release layer with the silk rod then on multi-functional layer, and 100 ℃ solidified 40 seconds, and 10 microns of thickness obtain the leather release liners.Carry out the test of glossiness and roughness.
Table 1: properties of product data
| Embodiment | Glossiness (%) | Roughness profile arithmetic average error Ra | 10 height of nao-and micro relief Rz |
| Embodiment 1 | 92 | 0.75 | 3.95 |
| Embodiment 2 | 95 | 0.66 | 3.30 |
| Embodiment 3 | 95 | 0.69 | 3.75 |
| Embodiment 4 | 97 | 0.59 | 3.10 |
| Embodiment 5 | 93 | 0.70 | 3.95 |
| Comparative Examples | 85 | 0.95 | 5.23 |
In the table:
1. glossiness method of testing:
With XGP60 ° of mirror display glossness gauge test glossiness.
2. roughness method of testing:
Measure roughness profile arithmetic average error Ra and 10 height of nao-and micro relief Rz with epoch hand-held roughmeter TR200.
By data in the table as can be seen, multi-functional layer is handled through press polish, and behind the coating release layer, the glossiness that obtains product obviously increases, and roughness reduces, and has mirror effect.
Claims (5)
1. mirror surface release paper for synthesizing leather, it comprises base material and release layer, is provided with the multi-functional layer of one deck between base material and release layer, it is characterized in that, be that 80-200 ℃, linear pressure are under the condition of 80-150kN/m multi-functional layer to be carried out press polish to handle in temperature; The roughness profile arithmetic average error Ra of described mirror surface release paper＜0.8 μ m, 10 height of nao-and micro relief Rz＜4.0 μ m, the 60 degree angle glossiness that record according to ISO-2813 are more than 90%;
The component and the parts by weight thereof of described multi-functional layer are: inorganic particulate 30-80, adhesive 20-80, dispersant 1-8, surfactant 1-5, water 30-80; Described release layer forms in the material and comprises alkyd modified silicones, melmac and acid catalyst at least.
2. according to the described mirror surface release paper of claim 1, it is characterized in that: described inorganic particulate is one or more in kaolin, clay, calcium carbonate, talcum powder or the barium sulfate, and the particle diameter of particle is 0.2-15 μ m.
3. according to the described mirror surface release paper of claim 2, it is characterized in that: described adhesive is one or more in benzene emulsion, styrene-butadiene emulsion, pure-acrylic emulsion or the Silicone acrylic emulsion.
4. according to the described mirror surface release paper of claim 3, it is characterized in that: described dispersant is waterglass, calgon, Sodium Polyacrylate, methyl sodiosul foaliphatate or gelatin.
5. according to the described mirror surface release paper of claim 4, it is characterized in that: described surfactant is dodecyl sodium sulfate, dodecyl benzyl dimethyl ammonium chloride or empgen BB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100755513A CN101691717B (en) | 2009-09-28 | 2009-09-28 | Mirror surface release paper for synthesizing leather |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100755513A CN101691717B (en) | 2009-09-28 | 2009-09-28 | Mirror surface release paper for synthesizing leather |
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| Publication Number | Publication Date |
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| CN101691717A CN101691717A (en) | 2010-04-07 |
| CN101691717B true CN101691717B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100755513A Active CN101691717B (en) | 2009-09-28 | 2009-09-28 | Mirror surface release paper for synthesizing leather |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107629239B (en) * | 2017-09-18 | 2020-11-03 | 南京盛凯新材料有限公司 | Preparation process for producing mirror release film by EB (Electron Beam) curing |
| JP7133929B2 (en) * | 2018-01-24 | 2022-09-09 | リンテック株式会社 | Casting paper for synthetic leather and method for producing synthetic leather |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1767345A1 (en) * | 2004-07-13 | 2007-03-28 | Lintec Corporation | Releasing sheet and formed article obtained by using such releasing sheet |
| CN1982534A (en) * | 2002-09-27 | 2007-06-20 | 大日本印刷株式会社 | Release sheet and synthetic leather |
| CN101413228A (en) * | 2008-11-27 | 2009-04-22 | 中国乐凯胶片集团公司 | Release paper for synthetic leather |
-
2009
- 2009-09-28 CN CN2009100755513A patent/CN101691717B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982534A (en) * | 2002-09-27 | 2007-06-20 | 大日本印刷株式会社 | Release sheet and synthetic leather |
| EP1767345A1 (en) * | 2004-07-13 | 2007-03-28 | Lintec Corporation | Releasing sheet and formed article obtained by using such releasing sheet |
| CN101413228A (en) * | 2008-11-27 | 2009-04-22 | 中国乐凯胶片集团公司 | Release paper for synthetic leather |
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| CN101691717A (en) | 2010-04-07 |
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Owner name: CHINA LUCKY GROUP CORPORATION Free format text: FORMER NAME: CHINESE LEKAI FILM GROUP CO |
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| CP03 | Change of name, title or address |
Address after: South Street, new urban lucky 071054 Hebei province Baoding City No. 6 Patentee after: China Lucky Group Corporation Patentee after: Lucky Film Co., Ltd. Address before: 071054 Kennan street, Hebei, Baoding, No. 6 Patentee before: Chinese Lekai Film Group Co Patentee before: Lucky Film Co., Ltd. |