CN104153204A

CN104153204A - Roller coating type preparation method and device for solvent-free two-component polyurethane synthetic leather as well as prepared synthetic leather

Info

Publication number: CN104153204A
Application number: CN201410366764.2A
Authority: CN
Inventors: 李杏明; 沈龙祥; 华江铭
Original assignee: SHANGHAI LANSHENG GREEN MATERIAL TECHNOLOGY Co Ltd
Priority date: 2014-07-29
Filing date: 2014-07-29
Publication date: 2014-11-19
Anticipated expiration: 2034-07-29
Also published as: CN104153204B

Abstract

The invention discloses a roller coating type preparation method for solvent-free two-component polyurethane synthetic leather. The roller coating type preparation method for the solvent-free two-component polyurethane synthetic leather comprises the following steps: (1) preparing raw materials; (2) coating a leather layer; (3) drying for the first time; (4) loading a substrate; (5) drying and curing; and (6) winding. The roller coating type preparation method for the solvent-free two-component polyurethane synthetic leather is simple in production process, capable of directly processing the leather in one step on a production line no matter which processing method is used, and low in energy consumption and low in cost.

Description

A kind of roller coating formula preparation method of solvent-free double-component polyurethane synthetic leather and the synthetic leather of equipment and preparation

Technical field

The invention belongs to Synthetic Leather technical field, related generally to a kind of preparation method and equipment that adopts roller coating formula solvent-free double-component polyurethane synthetic leather, and the synthetic leather of the method production.

Background technology

Leather industry is the conventional industries that China has comprehensive advantage.At present, the leather output of China accounts for the more than 20% of Gross World Product.

Natural leather has good natural characteristic, by people, is used for industry-by-industry, but along with people are to the multiplication of leather demand, limited natural leather can not be met the need of market.The appearance of synthetic leather, has made up the deficiency of this respect just.The output of China's synthetic leather is always and increases progressively state, has become the big producing country of world's synthetic leather, more has flourish trend under large economic environment.

Synthetic Leather is the macromolecular material that a class has property, research and development through twenties years, present Synthetic Leather has had the wear-resisting of excellence, folding, resistance to solvent, oil resistant, the mechanical performance such as ageing-resistant, and there is the excellent feel the same with natural leather, lustrous surface is soft, and excellent adhesive property between base material also possesses ventilatively simultaneously, can wash, easy to process, the advantage such as cheap, is the ideal substitute of natural leather, is widely used in footwear, suitcase, clothes, sofa, automotive trim, furniture etc.

In the market widely used be the oiliness synthetic leather that has solvent, this leather pollutes large, easily residual, many enterprises production Waterborne synthetic leather that once made the transition for this reason, although Waterborne synthetic leather ecological, environmental protective, but still need mix organic solvent, and stability is also not as oiliness synthetic leather, turned to for this reason and produced solvent-free synthetic leather, in raw material, there is no organic solvent, mean that volatile organic compounds (VOC) is almost equal to zero, reached the effect of controlling pollution sources, also eliminated the exhaust emission to environment, realize cleaner production, in workshop, there is no that pungent taste in the past, air has been got well a lot, also protected operator's health simultaneously.Therefore, with solventfree resin, produce synthetic leather, can be described as " omnidistance zero pollute ", if promote this technology, this contaminative industry in the past of synthetic leather will thoroughly have been moved towards environmental protection.

Simultaneously no-solvent polyurethane synthetic leather also has excellent physics and chemistry performance, as ventilative and water vapour permeability, folding resistance, ABRASION RESISTANCE, resistance to ag(e)ing, and excellent intensity and the percentage elongation of drawing high.Although solvent-free PU synthetic leather production technology or one " experiment field ", just come out of from laboratory, traction is very high, and especially the enterprise such as the case and bag of the Western European countries, furniture, leatherware, is all seeking free of contamination leather material.So solvent-free PU synthetic leather has more good market prospects.

Summary of the invention

In order to cater to the market demand and for the existing deficiency of prior art, one of object of the present invention has proposed a kind of roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather, and this roller coating formula preparation method technique is simple, can directly in streamline previous step, complete, energy consumption is low, with low cost.

Two of object of the present invention is to provide the equipment of realizing above-mentioned roller coating formula preparation method.

Three of object of the present invention is to provide the Synthetic Leather that adopts above-mentioned roller coating formula preparation method to prepare.

Roller coating formula preparation method as the solvent-free dual-component polyurethane synthetic leather of first aspect present invention, specifically comprises the steps:

1) raw material preparation process:

In mass fraction, by the polyalcohol of 100 parts, the chain extender of 2-30 part, the promoter of 0.05-2 part, the surfactant of 0.2-2 part, the levelling agent of 0.2-1 part, the ultra-violet absorber of 0-3 part, the water absorbing agent of 0-10 part, the delustering agent of 0-5 part, the coupling agent of 0-2 part, the filler of 0-10 part, after the colouring agent of 5-30 part stirs, as A1 material, add in the A1 batch can of the first casting machine; Or the colouring agent of 5-30 part is branched away in the color material tanks that joins separately the first casting machine;

The excessive prepolymer of isocyanate group that isocyanates or isocyanates and polyol reaction are obtained is expected as B1, adds in the B1 batch can of the first casting machine;

In mass fraction, by the polyalcohol of 100 parts, the chain extender of 0-10 part, the promoter of 0.05-2 part, the equal infusion of 0-2 part, the pore-creating agent of 0-1 part, the ultra-violet absorber of 0-3 part, the antioxidant of 0-3 part, after the blowing agent of 0-10 part stirs, as A2 material, add in the A2 batch can of the second casting machine; Isocyanates is expected as B2, add in the B2 batch can of casting machine 2;

2) coating cortex step:

According to mass ratio A1 Liao ︰ B1 material=100:40～120, in the first casting machine, stir mixing system obtains the first compound after in proportion A1 material and B1 being expected to be uniformly mixed, utilize the spreader in the first casting machine that the first compound is uniformly coated in the release liners of getting ready and forms cortex, the thickness of described cortex coating is 0.02-0.05mm;

3) the first drying steps

By step 2) be coated with corticated release liners and send in the first baking oven and be dried, dry temperature is 80-140 ℃, the dry time is 0.5-3min;

4) coating binder step

According to mass ratio A2 Liao ︰ B2 material=100:20～80, in the second casting machine, stir mixing system obtains the second compound after in proportion A2 material and B2 being expected to be uniformly mixed, utilize the spreader in the first casting machine that the second compound is evenly formed to layer of adhesive layer on the described cortex of coating, the thickness of the coating of the second compound is 0.02-0.05mm;

5) the second drying steps

By step 5) be coated with the corticated release liners of being with of adhesive phase and send in the second baking oven and be dried for the second time, dry temperature is room temperature-140 ℃ for the second time, the dry time is 0.5-2min;

6) upper base material step

Through step 5) laminating upper base material on dried adhesive phase, after four rollers tractions are stretching, obtain the leather crude product with release liners;

7) dry solidification step

By step 7) the leather crude product with release liners that obtains sends into and in dry solidification baking oven, carries out dry solidification and obtain the leather blank with release liners, the temperature 80-140 ℃ of dry solidification, the time of dry solidification is 1-5min;

8) rolling step

Through step 7) the leather blank with release liners after dry solidification carries out rolling by rolling-up mechanism and obtains the leather blank coiled strip with release liners.

Or the roller coating formula preparation method as the solvent-free dual-component polyurethane synthetic leather of first aspect present invention, specifically comprises the steps:

1) raw material preparation process:

2) coating cortex step:

According to mass ratio A1 Liao ︰ B1 material=100:(40-120), in the first casting machine, stir mixing system obtains the first compound after in proportion A1 material and B1 being expected to be uniformly mixed, utilize the spreader in the first casting machine that the first compound is uniformly coated in the release liners of getting ready and forms cortex, the thickness of described cortex coating is 0.02-0.05mm;

3) the first drying steps

4) upper base material step

Through step 3) laminating upper base material on dried cortex, after four rollers tractions are stretching, obtain the leather crude product with release liners;

5) dry solidification step

By step 4) the leather crude product with release liners that obtains sends into and in dry solidification baking oven, carries out dry solidification and obtain the leather with release liners, the temperature 80-140 ℃ of dry solidification, the time of dry solidification is 1-5min;

6) rolling step

Through step 5) the leather blank with release liners after dry solidification carries out rolling by rolling-up mechanism and obtains the leather blank coiled strip with release liners.

In a preferred embodiment of the invention, if the first drying steps cortex excess Temperature out, can also after the first drying steps, increase by a cooling step, described cooling step is by process step 3) dried be with corticated release liners to send into carry out in cooling device cooling.

In a preferred embodiment of the invention, after described rolling step, increase by a leather separating step, this leather separating step is that the leather blank coiled strip with release liners that rolling step is obtained carries out the separated of release liners and leather finished product, isolates the solvent-free dual-component polyurethane synthetic leather of finished product.

In a preferred embodiment of the invention, after described leather separating step, increase by a post curing step, the solvent-free dual-component polyurethane synthetic leather that is about to the finished product that leather separating step obtain is sent into and in post curing baking oven, is carried out post curing and process the solvent-free dual-component polyurethane synthetic leather that obtains finished product, post curing temperature is 80-120 ℃, and the time is 24-72 hour.

In a preferred embodiment of the invention, described polyalcohol is a kind of or any two or more mixture in PTMEG, polyoxypropyleneglycol, polyethylene glycol, polytetramethylene glycol, polyether triol, polyester-diol, PCDL.

In a preferred embodiment of the invention, described polyalcohol is a kind of in the flame retardant type PTMEG of molecular weight between 500-5000, flame retardant type polyester-diol, flame retardant type PCDL or two or more mixture arbitrarily.

In a preferred embodiment of the invention, described isocyanates is toluene di-isocyanate(TDI), diphenyl methane-4, a kind of or any two or more mixture in 4-vulcabond, liquefied mdi, thick MDI, isophorone diisocyanate, dicyclohexyl methyl hydride diisocyanate.

In a preferred embodiment of the invention, described chain extender is neopentyl glycol, ethylene glycol, diethylene glycol, 1, a kind of or any two or more mixture in 4 butanediols, 1,6 hexylene glycol, 3-methyl 1,5 pentanediol, glycerol, trimethylolpropane.

In a preferred embodiment of the invention, described promoter is a kind of or any two or more mixture in tin class promoter, organic zinc class promoter, organo-bismuth class promoter, amine type accelerator.

In a preferred embodiment of the invention, described surfactant is a kind of or any two or more mixture in Phosphate Anionic Surfactants, low bubble anion surfactant, low bubble non-ionic surface active agent.

In a preferred embodiment of the invention, described levelling agent is Siloxane-Oxyalkylene Copolymers.

In a preferred embodiment of the invention, described ultra-violet absorber is a kind of or any two or more mixture in UV-1, UV-326, UV-531, UV-770.

In a preferred embodiment of the invention, described water absorbing agent is a kind of or any two or more mixture in calcium oxide, anhydrous calcium chloride, phosphorus pentoxide.

In a preferred embodiment of the invention, described delustering agent is a kind of or any two or more mixture in wax, diatomite, silica.

In a preferred embodiment of the invention, described coupling agent is a kind of or any two or more mixture in aluminic acid compounds, titanate ester, silanes.

In a preferred embodiment of the invention, described filler is a kind of or any two or more mixture in potter's clay, calcium carbonate, talcum powder, barium sulfate.

In a preferred embodiment of the invention, described colouring agent is a kind of or any two or more mixture in redness, yellow, blueness, white, black.

In a preferred embodiment of the invention, described foam stabilizer is silicone foam stabiliser.

In a preferred embodiment of the invention, described pore-creating agent is one or both the mixing in polypropylene oxide-ethylene oxide copolyether, polyoxygenated alkene-polysiloxane copolymer.

In a preferred embodiment of the invention, described antioxidant is a kind of or any two or more mixture in antioxidant 1010, BHT, antioxidant T-215, antioxidant M-205.

In a preferred embodiment of the invention, described blowing agent is a kind of in water, air, F141b.

In a preferred embodiment of the invention, described base material be weave cotton cloth, a kind of in fiber, nonwoven fabric, cow split skin, pigskin, sheepskin, PVC.

Equipment as the roller coating formula preparation method of the solvent-free dual-component polyurethane synthetic leather of realizing of second aspect present invention, comprising:

Release liners unwinding device, described release liners unwinding device is emitted release liners;

The first casting machine, described the first casting machine is positioned at the rear side of described release liners unwinding device, receives the release liners that described release liners anti-curling device brings and by its spreader, in described release liners, is coated with the first compound;

The first baking oven, described the first baking oven is positioned at the rear side of described the first casting machine, receives the release liners that is coated with the first compound that described the first casting machine brings and the first compound in described release liners is dried and in release liners, formed cortex;

Base material discharges stacking apparatus, and described base material discharges the rear side that stacking apparatus is positioned at described the first baking oven, receives described cooling device brings discharge base material simultaneously and discharged base material is superimposed upon on described cortex with corticated release liners;

Haulage gear, described haulage gear is positioned at the rear side that described base material discharges stacking apparatus, and the release liners that is superimposed with base material and cortex that described base material release stacking apparatus is brought is drawn stretching;

Dry solidification baking oven, described dry solidification baking oven is positioned at the rear side of described haulage gear, and the release liners that is superimposed with base material and cortex receiving after stretching that described haulage gear brings is carried out dry solidification to form leather blank in release liners;

Wrap-up, described wrap-up is positioned at the rear side of described dry solidification baking oven, receives the release liners with leather blank that described dry solidification baking oven brings and to its rolling.

Or the equipment as the roller coating formula preparation method of the solvent-free dual-component polyurethane synthetic leather of realizing of second aspect present invention, comprising:

The first casting machine, described the first casting machine is positioned at the rear side of described release liners unwinding device, receives the release liners that described release liners anti-curling device brings and by its spreader, in described release liners, is coated with the first compound in described release liners;

The second casting machine, described the second casting machine is positioned at the rear side of described the first baking oven, receives described cooling device and brings and be with corticated release liners and by its spreader, on described cortex, be coated with the second compound;

The second baking oven, described the second baking oven is positioned at the rear side of described the second casting machine, receives described the second casting machine brings be coated with the corticated release liners of being with of the second compound and described the second compound is dried and formed an adhesive phase;

Base material discharges stacking apparatus, described base material discharges the rear side that stacking apparatus is positioned at described the second baking oven, receives the release liners that is superimposed with adhesive phase and cortex that described the second baking oven brings and discharges base material simultaneously and discharged base material is superimposed upon on described adhesive phase;

In a preferred embodiment of the invention, if the excess Temperature of the first baking oven can be provided with at the rear side of the first baking oven a cooling device, receive described the first baking oven and bring and be with corticated release liners and carry out cooling to it.

In a preferred embodiment of the invention, increase by a release liners separator after described wrap-up, described release liners separator receives the release liners with leather blank that described wrap-up brings leather blank is separated with release liners.

In a preferred embodiment of the invention, after described release liners separator, increase by a post curing baking oven, described post curing baking oven receives the leather blank that described release liners separator brings and received leather blank is carried out to the solvent-free dual-component polyurethane synthetic leather that post curing obtains finished product;

In a preferred embodiment of the invention, described the first casting machine is equipped with two A1 batch cans and two B1 batch cans.

In a preferred embodiment of the invention, described the first casting machine is equipped with a plurality of color material tanks.

In a preferred embodiment of the invention, described the second casting machine is equipped with two A2 batch cans and two B2 batch cans.

In a preferred embodiment of the invention, the spreader of described the first casting machine comprises a pouring head and a pair of to the roller coating rolling, and the roller coating of described a pair of pair roller is positioned at the rear side of described pouring head, in order to control the coating thickness of described the first compound; Wherein a pair of is timing self-cleaning roller to the roller coating contacting with described the first compound in the roller coating rolling.The cleaning agent that described timing self-cleaning roller adopts while cleaning is ethyl acetate.

In a preferred embodiment of the invention, the spreader of described the second casting machine comprises a pouring head and a pair of to the roller coating rolling, and the roller coating of described a pair of pair roller is positioned at the rear side of described pouring head, in order to control the coating thickness of described the first compound; Wherein a pair of is timing self-cleaning roller to the roller coating contacting with described the first compound in the roller coating rolling.

In a preferred embodiment of the invention, on the pouring head in the spreader of described the second casting machine, offer one and add pore, with as required, inflate and utilize the principle of the cake of beating eggs to carry out physical blowing.

In a preferred embodiment of the invention, described timing self-cleaning roller comprises applicator roll, a pair of commutation deflector roll, is looped around coating zone, cleaning fluid shower nozzle, cleaning hairbrush and air extractor on described applicator roll and a pair of commutation deflector roll, described cleaning fluid shower nozzle, cleaning hairbrush and air extractor are arranged on the top of the coating zone between a pair of commutation deflector roll, clean hairbrush and contact with the coating zone between described a pair of commutation deflector roll, the cleaning agent of cleaning fluid shower nozzle ejection is ethyl acetate.

In a preferred embodiment of the invention, described base material discharges stacking apparatus and comprises a base material unreeling structure and a base material overlaying mechanism, and wherein base material overlaying mechanism is a pair of to the press bonding roller rolling, and wherein at least one press bonding roller is warm-up mill.

Solvent-free dual-component polyurethane synthetic leather as third aspect present invention adopts above-mentioned preparation method to prepare.

Manufacture craft of the present invention is simple, no matter be which kind of processing method all can directly complete in streamline previous step, energy consumption is low, with low cost.

The Synthetic Leather that the present invention produces, because processing method is different, selects base material different, is widely used in suitcase, sofa, clothes, automotive trim, shoes, the every field such as furniture.

The Synthetic Leather that the present invention produces, detects and does not contain following common solvent: 1.DMF (dimethyl formamide) through SGS; 2. toluene; 3. butanone; 4. acetone; 5. ethyl acetate.

The Synthetic Leather that the present invention produces, detects through SGS, reaches the 6P standard of European Union.6P is cadmium (Cd), plumbous (Pb), mercury (Hg), Cr VI (Cr6+), PBBs (PBBs), PBDEs (PBDEs).Wherein the content of cadmium is <100ppm, and all the other five kinds are <1000ppm.

With respect to other prior art, tool of the present invention has the following advantages:

1) coating method is regularly drum-type knife coating, and raw material is convenient to be cleaned, and is not easy because condensing for a long time.

2) energy-saving type baking oven, inner air blast circulation, volume is little, because solvent-free, does not worry that solvent evaporates is in baking oven, and energy consumption is low.

3) cold wind is cooling, and inner loop is determined according to material property.

4) according to demand, processing method different, has the leather of 2 kinds of specifications: the direct coated substrate type of a, and from coating cortex, without coating binder, direct coated substrate, one-shot forming, has very high adhesion strength too.B coating binder type, from coating cortex, then coating binder, last coated substrate again, twice moulding, gluingly mainly also divides and has two kinds, and a kind of is expansion type not, and a kind of is expansion type.

Accompanying drawing explanation

Fig. 1 is the equipment schematic diagram that the embodiment of the present invention 1 realizes the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather.

Fig. 2 is the equipment schematic diagram that the embodiment of the present invention 2 realizes the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather.

Fig. 3 is the timing self-cleaning drum structure schematic diagram in the present invention's the first casting machine.

Fig. 4 is the timing self-cleaning drum structure schematic diagram in the present invention's the second casting machine.

The specific embodiment

Embodiment 1

Referring to Fig. 1, the roller coating formula preparation method's who realizes solvent-free dual-component polyurethane synthetic leather who provides in figure equipment comprises that release liners unwinding device 100, the first casting machine 200, the first baking oven 300, base material discharge stacking apparatus 400, haulage gear 500, dry solidification baking oven 600, wrap-up 700, release liners separator 800, post curing baking oven 900.

Release liners unwinding device 100, the first casting machine 200, the first baking oven 300, base material release stacking apparatus 400, haulage gear 500, dry solidification baking oven 600, wrap-up 700, release liners separator 800, post curing baking oven 900 are arranged before and after being pipeline system.

Release liners unwinding device 100 is emitted the rear side that release liners 110, the first casting machines 200 are positioned at release liners unwinding device 100, and the release liners 110 that reception release liners anti-curling device 100 is brought is also coated with the first compound 220 by its pouring head 210 in release liners 110; In release liners 110, can design various decorative patterns.

The first compound 220 is controlled its thickness by being arranged on a pair of after pouring head 210 to the roller coating 230,240 rolling.The first casting machine 200 has two A1 batch cans and two B1 batch can (not shown)s, can accomplish continuous production like this, is unlikely to stop production when supplementing material.Certainly in the first casting machine 200, can also be equipped with in addition 3 pigment cylinders, can mix by the adjusting of flow the combination of various different colours decorative patterns.In the first casting machine 200, measuring pump is resistant to elevated temperatures low speed measuring pump (450 ℃ of heatproofs, withstand voltage 10MPa).Heating material in the first casting machine 200 adopts conduction oil circulating-heating, to guarantee heated constant temperature.In the first casting machine 200, be also equipped with flowmeter, flowmeter, with heating function, more can accurately draw the quality of the raw material that casting machine spues.A pair of lower to roller coating 230,240 rotating speeds that roll in the first casting machine 200, ratio of precision is higher, and concrete error is 3.5-5 ‰.

A pair of in the first casting machine 200 is self-cleaning roller regularly to the roller coating 230 contacting with the first compound 220 in the roller coating 230,240 rolling, it can be cleaned within a certain period of time automatically, do not worry owing to working and causing condensing of the first compound 220 for a long time.In conjunction with referring to Fig. 3, roller coating 230 comprises applicator roll 231, a pair of commutation deflector roll 232,233, is looped around coating zone 234, cleaning fluid shower nozzle 235, cleaning hairbrush 236 and air extractor 237 on applicator roll 231 and a pair of commutation deflector roll 232,233, cleaning fluid shower nozzle 235, cleaning hairbrush 236 and air extractor 237 are arranged on the top of the coating zone 234 between a pair of commutation deflector roll 232,233, clean hairbrush 236 and contact with the coating zone 234 between a pair of commutation deflector roll 232,233, the cleaning agent of cleaning fluid shower nozzle 235 ejections is ethyl acetate.

The first baking oven 300 is positioned at the rear side of the first casting machine 200, and the release liners that is coated with the first compound that reception the first casting machine 200 is brought is also dried and in release liners 110, formed cortex 310 the first compound 220 in release liners 110.The first baking oven 300 is energy-saving type baking oven, adopts inner loop mode air blast, and this baking oven volume is little, more can fall low-energy loss, and the length of the first baking oven 300 is 20m.

If the first baking oven 300 release liners 110 excess Temperatures with cortex 310 out, can increase at the rear side of the first baking oven 300 by a cooling device, reception the first baking oven 300 is brought with the release liners 110 of cortex 310 and is carried out cooling to it.Cooling device is a cooler bin, adopts interior circulation cold air to carry out cooling, and length is 4m.If the first baking oven 300 release liners 110 temperature with cortex 310 are out suitable, there is no need to increase cooling device.

Base material discharges the rear side that stacking apparatus 400 is positioned at the first baking oven 300, and the release liners 110 with cortex 310 that reception the first baking oven 300 is brought discharges base material 410 simultaneously and discharged base material 410 is superimposed upon on cortex 310.Base material discharges stacking apparatus 400 and comprises base material relieving mechanism 430 and a pair of press bonding roller rolling 420, and this is pressed together on base material 410 stacks on cortex 310 press bonding roller 420 rolling.This is warm-up mill to the upper press bonding roller 421 in the press bonding roller 420 rolling, and adopts conduction oil to heat also arbitrarily regulating and controlling temperature.

Haulage gear 500 is positioned at base material and discharges stacking apparatus 400 rear sides, and haulage gear 500 is one or four roller haulage gears, is certainly also not limited to four roller haulage gears, can be three roller haulage gears or the haulage gear of multiple roll more.If need the one or more carry-over pinch rolls in haulage gear 500 to be designed to chill roll, pass into cooling water and carry out cooling to being superimposed with the release liners 110 of base material 410, cortex 310.

Dry solidification baking oven 600 is positioned at the rear side of haulage gear 500, and the release liners that is superimposed with base material 410 and cortex 310 110 that reception haulage gear 500 is brought is carried out dry solidification and in release liners 310, formed leather blank 610.

Wrap-up 700 is positioned at the rear side of dry solidification baking oven 600, receive that dry solidification baking oven 600 brings with the release liners 310 of leather blank 610 and to its rolling.

Because the leather blank 610 in dry solidification baking oven 600 release liners 110 out has had certain intensity, therefore can increase by a release liners separator 800 below at wrap-up 700, leather blank 610 is separated with release liners 110.

Can increase by a post curing baking oven 900 below at release liners separator 800 in addition, the leather blank 610 that reception release liners separator 700 is brought also carries out to received leather blank 610 the solvent-free dual-component polyurethane synthetic leather 910 that post curing obtains finished product.

Embodiment 2

Referring to Fig. 2, the roller coating formula preparation method's who realizes solvent-free dual-component polyurethane synthetic leather who provides in figure equipment comprises that release liners unwinding device 100, the first casting machine 200, the first baking oven 300, the second casting machine 1000, the second baking oven 1100, base material discharge stacking apparatus 400, haulage gear 500, dry solidification baking oven 600, wrap-up 700, release liners separator 800, post curing baking oven 900 and wrap-up 900.

Release liners unwinding device 100, the first casting machine 200, the first baking oven 300, base material discharge stacking apparatus 400, haulage gear 500, dry solidification baking oven 600, release liners separator 700, post curing baking oven 800 and wrap-up 900 and are pipeline system front and back layout.

The second casting machine 1000 is positioned at the rear side of the first baking oven 300, receives the first baking oven 300 and brings with the release liners 110 of cortex 310 and on cortex 310, be coated with the second compound 1020 by its pouring head 1010.

The second compound 1020 is controlled its thickness by being arranged on a pair of after pouring head 1010 to the roller coating 1030,1040 rolling.The second casting machine 1000 has two A2 batch cans and two B2 batch can (not shown)s, can accomplish continuous production like this, is unlikely to stop production when supplementing material.In the second casting machine 1000, measuring pump is resistant to elevated temperatures low speed measuring pump (450 ℃ of heatproofs, withstand voltage 10MPa).Heating material in the second casting machine 1000 adopts conduction oil circulating-heating, to guarantee heated constant temperature.In the second casting machine 1000, be also equipped with flowmeter, flowmeter, with heating function, more can accurately draw the quality of the raw material that casting machine spues.A pair of lower to roller coating 1030,1040 rotating speeds that roll in the second casting machine 1000, ratio of precision is higher, and concrete error is 3.5-5 ‰.

A pair of in the second casting machine 1000 is self-cleaning roller regularly to the roller coating 1030 contacting with the second compound 1020 in the roller coating 1030,1040 rolling, it can be cleaned within a certain period of time automatically, do not worry owing to working and causing condensing of the second compound 1020 for a long time.In conjunction with referring to Fig. 3, roller coating 1030 comprises applicator roll 1031, a pair of commutation deflector roll 1032, 1033, be looped around applicator roll 1031 and a pair of commutation deflector roll 1032, coating zone 1034 on 1033, cleaning fluid shower nozzle 1035, clean hairbrush 1036 and air extractor 1037, cleaning fluid shower nozzle 1035, clean hairbrush 1036 and air extractor 1037 and be arranged on a pair of commutation deflector roll 1032, the top of the coating zone 1034 between 1033, clean hairbrush 1036 and a pair of commutation deflector roll 1032, coating zone 1034 contacts between 1033, the cleaning agent of cleaning fluid shower nozzle 1035 ejections is ethyl acetate.

On the pouring head 1010 of the second casting machine 1000, offer one and add pore, with as required, inflate and utilize the principle of the cake of beating eggs to carry out physical blowing.

The second baking oven 1100 is positioned at the rear side of the second casting machine 1000, and the release liners 110 with cortex 310 that is coated with the second compound 1020 that reception the second casting machine 1000 is brought is also dried and formed an adhesive phase 1110 the second compound 1020.The second baking oven 1100 is energy-saving type baking oven, adopts inner loop mode air blast, and this baking oven volume is little, more can fall low-energy loss, and the length of the second baking oven 1100 is 15m.

Dry solidification baking oven 600 is positioned at the rear side of haulage gear 500, and the release liners that is superimposed with base material 410, adhesive phase 1110 and cortex 310 110 that reception base material release stacking apparatus 400 is brought is carried out dry solidification and in release liners 310, formed leather blank 620.

Wrap-up 700 is positioned at the rear side of dry solidification baking oven 600, receive that dry solidification baking oven 600 brings with the release liners 310 of leather blank 620 and to its rolling.

Because the leather blank 620 in dry solidification baking oven 600 release liners 110 out has had certain intensity, therefore can increase by a release liners separator 800 below at wrap-up 700, leather blank 620 is separated with release liners 310.

Can increase by a post curing baking oven 900 below at release liners separator 800 in addition, the leather blank 620 that reception release liners separator 700 is brought also carries out to received leather blank 610 the solvent-free dual-component polyurethane synthetic leather 920 that post curing obtains finished product.

The linear velocity of embodiment 1 and 2 the roller coating formula preparation method's who realizes solvent-free dual-component polyurethane synthetic leather equipment is 5-25m/min.

Next, take the equipment of embodiment 1 and 2 describes preparation method's of the present invention embodiment in detail as example.

Embodiment 3:

The equipment that the roller coating formula preparation method of the solvent-free dual-component polyurethane synthetic leather of this embodiment adopts is the equipment of 1 publicity of embodiment.

1) first in mass fraction, by the polyester-diol of 100 parts (molecular weight 2000), 8 parts 1,4 butanediols, the trimethylolpropane of 4 parts, the organo-bismuth promoter of 0.2 part, the organic zinc promoter of 0.4 part, the ultra-violet absorber of 2 parts, the delustering agent of 2 parts, the levelling agent of 0.5 part, the surfactant of 0.5 part, after the colouring agent of 20 parts stirs, obtain A1 material, pour two A1 material cylinders of the first casting machine 200 into and be incubated at 40 ℃; Using ready performed polymer as B1, material is poured two B1 material cylinders the insulation at 40 ℃ of the first casting machine 200 into, and performed polymer is the synthetic nco value of polyester-diol and MDI and modification MDI and MDI-50 at 15% prepolymer.

2) according to mass ratio 100:79, in the first casting machine 200, stir mixing system obtains the first compound 220 after in proportion A1 material and B1 being expected to be uniformly mixed, utilize the pouring head 210 in the first casting machine 200 to be coated on uniformly in off-the-shelf release liners 110 the first compound 220, selected release liners 110 is with certain lines, also by the lines that is leather, the release liners of below selecting is this type of release liners, and the release liners of selecting according to the difference of leather application is also different.The linear velocity of whole equipment is adjusted to 25m/min.The coating thickness of the first compound 220 is 0.05mm.

3) through 300 pairs of the first compounds 220 of the first baking oven, dry 80 ℃ of temperature that obtain cortex 310, the first baking ovens 300, the length of the first baking oven 300 is 20m.

4) after the first baking oven 300 preliminarily drieds, enter base material and discharge stacking apparatus 400 base material 410 that directly superposes on cortex 310, through a pair of to after press bonding roller 420 pressings of rolling, sending into haulage gear 500 carries out stretching, after stretching, send into dry solidification baking oven 600 and carry out dry solidification and obtain leather blank 610, the temperature of dry solidification baking oven 600 is 80 ℃.

5) release liners 110 with leather blank 610 that dry solidification baking oven 600 is sent is by wrap-up 700 rollings.

6) can be by a release liners separator 800, leather blank 610 is separated with release liners 110 by the release liners 110 with leather blank 610 of wrap-up 700 rollings, the leather blank 610 after separation is sent into and in a post curing baking oven 900, is carried out post curing and process and obtain solvent-free dual-component polyurethane synthetic leather 910.Post curing temperature is 80 ℃, and the time is 24 hours.

The processing method of this embodiment is directly upper base material type, and the leather that the method makes can be applied in the fields such as suitcase, clothes, furniture.

Embodiment 4:

The equipment that the roller coating formula preparation method of the solvent-free dual-component polyurethane synthetic leather of this embodiment adopts is the equipment of 2 publicities of embodiment.

1) first in mass fraction, by the polytetramethylene glycol (PTMG of 60 parts, molecular weight 2000), the polyoxypropyleneglycol of 40 parts (PPG, molecular weight 1000), 10 parts 1,4 butanediols, 5 parts of ethylene glycol, 0.6 part of tin class promoter (T-12,10% dilution), the organic zinc promoter of 0.3 part, the ultra-violet absorber of 2 parts, the delustering agent of 1 part, the levelling agent of 0.5 part, the surfactant of 0.5 part, the coupling agent of 1 part, obtains A1 material after the colouring agent of 20 parts stirs, two A1 that pour the first casting machine 200 into expect in cylinders and keep temperature to be 40 ℃; Using ready performed polymer as B1, to pour in two B1 material cylinders of the first casting machine 200 and keep temperature be 40 ℃ to material, and performed polymer is that the synthetic nco value of polytetramethylene glycol and MDI and modification MDI is at the prepolymer of 20% left and right.

2) equally in mass fraction, by 100 parts of polyester-diols (molecular weight 2000), 5 parts of ethylene glycol, the blowing agent of 5 parts (this blowing agent is selected F141b), 0.5 part of tin class promoter (T-9, this promoter is for diluting with polyester 10%), the amine type accelerator of 0.2 part (A33), after fully stirring, the equal infusion of 0.5 part expects as A2 two A2 that pour the second casting machine 1000 into expect in cylinders and keep temperature to be 30 ℃, if room temperature >30 ℃ keeps room temperature; Using ready thick MDI as B2, expect that two B2 that pour the second casting machine 1000 into expect in cylinders and keep room temperature.

3) according to mass ratio A1 Liao ︰ B1 material=100:83, in the first casting machine 200, stir mixing system obtains the first compound 220 after in proportion A1 material and B1 being expected to be uniformly mixed, utilize the pouring head 210 in the first casting machine 200 to be coated on uniformly in off-the-shelf release liners 110 the first compound 220, the linear velocity of whole equipment is adjusted to 15m/min.The coating thickness of the first compound 220 is 0.04mm.

4) through 300 pairs of the first compounds 220 of the first baking oven, dry 80 ℃ of temperature that obtain cortex 310, the first baking ovens 300, the length of the first baking oven 300 is 20m.

5) according to mass ratio A2 Liao ︰ B2 material=100:36, in the second casting machine 1000, stir mixing system obtains the second compound 1020 after in proportion A1 material and B1 being expected to be uniformly mixed, and utilizes the pouring head 1010 in the second casting machine 1000 to be coated on uniformly cortex 310 the second compound 1020.The coating thickness of the second compound 1020 is 0.04mm.

6) through 1100 pairs of the second compounds 1020 of the second baking oven, dry 120 ℃ of temperature that form adhesive phase 1110, the second baking ovens 1100, the length of the second baking oven 1100 is 15m.

7) after the second baking oven 1100 is dried, enter base material and discharge stacking apparatus 400 base material 410 that directly superposes on cortex 310, through a pair of to after press bonding roller 420 pressings of rolling, sending into haulage gear 500 carries out stretching, after stretching, send into dry solidification baking oven 600 and carry out dry solidification and obtain leather blank 610, the temperature of dry solidification baking oven 600 is 80 ℃.

8) release liners 110 with leather blank 620 that dry solidification baking oven 600 is sent is by wrap-up 700 rollings.

9) can be by a release liners separator 800, leather blank 620 is separated with release liners 110 by the release liners 110 with leather blank 620 of wrap-up 700 rollings, the leather blank 620 after separation is sent into and in a post curing baking oven 900, is carried out post curing and process and obtain solvent-free dual-component polyurethane synthetic leather 920.Post curing temperature is 80 ℃, and the time is 24 hours.

The processing method of this embodiment is coating binder type, and its second compound 1020 adhesive that is physical foaming, and the leather that the method makes can be applied in the fields such as suitcase, sofa, automotive trim.

Embodiment 5:

1) first in mass fraction, by the polyethylene glycol of 100 parts (molecular weight 2000), the neopentyl glycol of 5 parts, the ethylene glycol of 10 parts, the organo-bismuth promoter of 0.4 part, the organic zinc promoter of 0.4 part, the ultra-violet absorber of 2 parts, the delustering agent of 2 minutes, the levelling agent of 0.5 part, the surfactant of 0.5 part, obtains A1 material after the colouring agent of 25 parts stirs, pour two A1 material cylinders of the first casting machine 200 into and be incubated at 50 ℃; Using ready performed polymer as B1, material is poured two B1 material cylinders the insulation at 50 ℃ of the first casting machine 200 into, and performed polymer is the synthetic nco value of polyethylene glycol and MDI and MDI-50 at 18% prepolymer.

2) equally in mass fraction, by the polyester-diol of 100 parts (molecular weight 3000), 2 parts 1,4 butanediols, the distilled water of 1 part (water is made blowing agent), the tin class promoter (T-9 of 0.3 part, 10% dilution), the amine type accelerator of 0.1 part (A33), the organic zinc promoter of 0.2 part, expects as A2 two A2 that pour the second casting machine 1000 into expect in cylinders and keep temperature to be 40 ℃ after the equal infusion of 0.5 part fully stirs; Using ready performed polymer as B2, to pour in two B2 material cylinders of the second casting machine 1000 and keep temperature be 40 ℃ to material, and performed polymer is the synthetic nco value of polyester-diol and MDI and MDI-50 at 18% prepolymer.

3) according to mass ratio A1 Liao ︰ B1 material=100:87, in the first casting machine 200, stir mixing system obtains the first compound 220 after in proportion A1 material and B1 being expected to be uniformly mixed, utilize the pouring head 210 in the first casting machine 200 to be coated on uniformly in off-the-shelf release liners 110 the first compound 220, the linear velocity of whole equipment is adjusted to 12m/min.The coating thickness of the first compound 220 is 0.04mm.

4) through 300 pairs of the first compounds 220 of the first baking oven, dry 120 ℃ of temperature that obtain cortex 310, the first baking ovens 300, the length of the first baking oven 300 is 20m.

5) according to mass ratio A2 Liao ︰ B2 material=100:52, in the second casting machine 1000, stir mixing system obtains the second compound 1020 after in proportion A1 material and B1 being expected to be uniformly mixed, and utilizes the pouring head 1010 in the second casting machine 1000 to be coated on uniformly cortex 310 the second compound 1020.The coating thickness of the second compound 1020 is 0.04mm.

6) through 1100 pairs of the second compounds 1020 of the second baking oven, dry 110 ℃ of temperature that form adhesive phase 1110, the second baking ovens 1100, the length of the second baking oven 1100 is 15m.

The processing method of this embodiment is two-step method, and its second compound 1020 is chemical blowing type adhesive, and the leather that the method makes can be applied in the fields such as suitcase, sofa, shoes.

Embodiment 6:

1) first, in mass fraction, by the PCDL of 50 parts (molecular weight 2000), the polyester-diol of 50 parts (molecular weight 2000), 10 parts 1,4 butanediols, the organo-bismuth promoter of 0.3 part, the organic zinc promoter of 0.3 part, the ultra-violet absorber of 2 parts, the delustering agent of 1 part, the levelling agent of 0.5 part, the surfactant of 0.5 part stirs in the rear A1 material cylinder of pouring the first casting machine 200 as A1 material into; Using ready performed polymer as A2, material is poured in the B1 material cylinder of the first casting machine 200, and performed polymer is the synthetic nco value of PCDL and polyester diol and MDI and modification MDI at 20 prepolymer; Three kinds of colouring agents are poured into respectively in three pigment cylinders of the first casting machine 200.

2) equally in mass fraction, by 50 parts of polyester-diols (molecular weight 2000), 50 parts of PCDL (molecular weight 2000), 5 parts 1,4 butanediols, 0.5 part of tin class promoter (T-9,10% dilution), the amine type accelerator of 0.1 part (A33), pours in the A2 material cylinder of the second casting machine 1000 as A2 material after the equal infusion of 0.5 part fully stirs; Using ready performed polymer as B2, material is poured in the B2 material cylinder of the second casting machine 1000, and performed polymer is the synthetic nco value of PCDL and polyester diol and MDI and modification MDI at 20% prepolymer; The pore that adds on the pouring head 1010 of the second casting machine 1000 connects air compressor machine, for inflating.

3) according to mass ratio A1 Liao ︰ B1 material=100:64, in the first casting machine 200, stir mixing system is in proportion by A1 material with B1 expects and three kinds of colouring agents obtain the first compound 220 after being uniformly mixed, utilize the pouring head 210 in the first casting machine 200 to be coated on uniformly in off-the-shelf release liners 110 the first compound 220, the linear velocity of whole equipment is adjusted to 10m/min.The coating thickness of the first compound 220 is 0.04mm.

5) according to mass ratio A2 Liao ︰ B2 material=100:44, in the second casting machine 1000, stir mixing system obtains the second compound 1020 after in proportion A1 material and B1 material being uniformly mixed, and unlatching air compressor machine utilizes the pouring head 1010 in the second casting machine 1000 to be coated on uniformly cortex 310 the second compound 1020.The pressure 0.02MPa of pouring head 1010, the coating thickness of the second compound 1020 is 0.04mm.

The processing method of this embodiment is two-step method.And the adhesive that its second compound 1020 is physical foaming, this adhesive utilization cake principle of beating eggs, inflates foaming.Other three colouring agents directly access the mixing head of the first casting machine 200, by the control to flow and the duration of pouring, mix different colours, different decorative pattern shape, cater to various needs.The leather that the method makes can be applied in the fields such as sofa, suitcase, furniture.

Polyester of the present invention synthesizes example

1) polyester that adipic acid and ethylene glycol synthetic molecular weight are 1950-2050.

2) polyester that adipic acid and Isosorbide-5-Nitrae butanediol, ethylene glycol, diethylene glycol synthetic molecular weight are 3450-3550.

3) polyester that M-phthalic acid, phthalic acid, azelaic acid and ethylene glycol, neopentyl glycol synthetic molecular weight are 1950-2050.

4) polyester that adipic acid, M-phthalic acid and ethylene glycol, neopentyl glycol synthetic molecular weight are 3900-4100.

5) polyester that adipic acid, M-phthalic acid and ethylene glycol, neopentyl glycol synthetic molecular weight are 1950-2050.

6) polyester that adipic acid and ethylene glycol, Isosorbide-5-Nitrae butanediol, neopentyl glycol synthetic molecular weight are 950-1050.

7) polyester that adipic acid and ethylene glycol, Isosorbide-5-Nitrae butanediol, neopentyl glycol synthetic molecular weight are 1950-2050.

8) select different alcohol and acid, different consumptions, makes the polyester of different molecular weight, with it, makes leather, is applied in different fields.

Claims

1. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather, is characterized in that, specifically comprises the steps:

1) raw material preparation process:

2) coating cortex step:

3) the first drying steps

4) coating binder step

5) the second drying steps

6) upper base material step

7) dry solidification step

8) rolling step

2. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather, is characterized in that, specifically comprises the steps:

1) raw material preparation process:

2) coating cortex step:

3) the first drying steps

4) upper base material step

5) dry solidification step

6) rolling step

3. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, after the first drying steps, increase by a cooling step, described cooling step is by process step 3) dried be with corticated release liners to send into carry out in cooling device cooling.

4. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, after described rolling step, increase by a leather separating step, this leather separating step is that the leather blank coiled strip with release liners that rolling step is obtained carries out the separated of release liners and leather finished product, isolates the solvent-free dual-component polyurethane synthetic leather of finished product.

5. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 3, it is characterized in that, after described leather separating step, increase by a post curing step, the solvent-free dual-component polyurethane synthetic leather that is about to the finished product that leather separating step obtain is sent into and in post curing baking oven, is carried out post curing and process the solvent-free dual-component polyurethane synthetic leather that obtains finished product, post curing temperature is 80-120 ℃, and the time is 24-72 hour.

6. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described polyalcohol is a kind of or any two or more mixture in PTMEG, polyoxypropyleneglycol, polyethylene glycol, polytetramethylene glycol, polyether triol, polyester-diol, PCDL.

7. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described polyalcohol is a kind of in the flame retardant type PTMEG of molecular weight between 500-5000, flame retardant type polyester-diol, flame retardant type PCDL or two or more mixture arbitrarily.

8. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described isocyanates is toluene di-isocyanate(TDI), diphenyl methane-4, a kind of or any two or more mixture in 4-vulcabond, liquefied mdi, thick MDI, isophorone diisocyanate, dicyclohexyl methyl hydride diisocyanate.

9. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described chain extender is neopentyl glycol, ethylene glycol, diethylene glycol, 1,4 butanediols, 1, a kind of or any two or more mixture in 6 hexylene glycols, 3-methyl 1,5 pentanediol, glycerol, trimethylolpropane.

10. the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described promoter is a kind of or any two or more mixture in tin class promoter, organic zinc class promoter, organo-bismuth class promoter, amine type accelerator.

The roller coating formula preparation method of 11. solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, is characterized in that, described water absorbing agent is a kind of or any two or more mixture in calcium oxide, anhydrous calcium chloride, phosphorus pentoxide.

The roller coating formula preparation method of 12. solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, is characterized in that, described foam stabilizer is silicone foam stabiliser.

The roller coating formula preparation method of 13. solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, it is characterized in that, described pore-creating agent is one or both the mixing in polypropylene oxide-ethylene oxide copolyether, polyoxygenated alkene-polysiloxane copolymer.

The roller coating formula preparation method of 14. solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, is characterized in that, described blowing agent is a kind of in water, air, F141b.

The roller coating formula preparation method of 15. solvent-free dual-component polyurethane synthetic leather as claimed in claim 1 or 2, is characterized in that, described base material be weave cotton cloth, a kind of in fiber, nonwoven fabric, cow split skin, pigskin, sheepskin, PVC.

16. realize the equipment of realizing the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather claimed in claim 1, it is characterized in that, comprising:

17. realize the equipment of realizing the roller coating formula preparation method of solvent-free dual-component polyurethane synthetic leather claimed in claim 2, it is characterized in that, comprising:

18. equipment as described in claim 16 or 17, is characterized in that, at the rear side of the first baking oven, are provided with a cooling device, receive described the first baking oven and bring and be with corticated release liners and carry out cooling to it.

19. equipment as described in claim 16 or 17, it is characterized in that, after described wrap-up, increase by a release liners separator, described release liners separator receives the release liners with leather blank that described wrap-up brings leather blank is separated with release liners.

20. equipment as claimed in claim 19, it is characterized in that, after described release liners separator, increase by a post curing baking oven, described post curing baking oven receives the leather blank that described release liners separator brings and received leather blank is carried out to the solvent-free dual-component polyurethane synthetic leather that post curing obtains finished product.

21. equipment as described in claim 16 or 17, is characterized in that, described the first casting machine is equipped with two A1 batch cans and two B1 batch cans.

22. equipment as described in claim 16 or 17, is characterized in that, described the first casting machine is equipped with a plurality of color material tanks.

23. equipment as described in claim 16 or 17, is characterized in that, described the second casting machine is equipped with two A2 batch cans and two B2 batch cans.

24. equipment as described in claim 16 or 17, it is characterized in that, the spreader of described the first casting machine comprises a pouring head and a pair of to the roller coating rolling, and the roller coating of described a pair of pair roller is positioned at the rear side of described pouring head, in order to control the coating thickness of described the first compound; Wherein a pair of is timing self-cleaning roller to the roller coating contacting with described the first compound in the roller coating rolling.

25. equipment as claimed in claim 24, is characterized in that, the cleaning agent that described timing self-cleaning roller adopts while cleaning is ethyl acetate.

26. equipment as claimed in claim 24, it is characterized in that, described timing self-cleaning roller comprises applicator roll, a pair of commutation deflector roll, is looped around coating zone, cleaning fluid shower nozzle, cleaning hairbrush and air extractor on described applicator roll and a pair of commutation deflector roll, described cleaning fluid shower nozzle, cleaning hairbrush and air extractor are arranged on the top of the coating zone between a pair of commutation deflector roll, clean hairbrush and contact with the coating zone between described a pair of commutation deflector roll, the cleaning agent of cleaning fluid shower nozzle ejection is ethyl acetate.

27. equipment as described in claim 16 or 17, it is characterized in that, the spreader of described the second casting machine comprises a pouring head and a pair of to the roller coating rolling, and the roller coating of described a pair of pair roller is positioned at the rear side of described pouring head, in order to control the coating thickness of described the first compound; Wherein a pair of is timing self-cleaning roller to the roller coating contacting with described the first compound in the roller coating rolling.

28. equipment as claimed in claim 27, is characterized in that, offer one and add pore on the pouring head in the spreader of described the second casting machine, with as required, inflate and utilize the principle of the cake of beating eggs to carry out physical blowing.

29. equipment as claimed in claim 27, it is characterized in that, described timing self-cleaning roller comprises applicator roll, a pair of commutation deflector roll, is looped around coating zone, cleaning fluid shower nozzle, cleaning hairbrush and air extractor on described applicator roll and a pair of commutation deflector roll, described cleaning fluid shower nozzle, cleaning hairbrush and air extractor are arranged on the top of the coating zone between a pair of commutation deflector roll, clean hairbrush and contact with the coating zone between described a pair of commutation deflector roll, the cleaning agent of cleaning fluid shower nozzle ejection is ethyl acetate.

30. equipment as described in claim 16 or 17, is characterized in that, described base material discharges stacking apparatus and comprises a base material unreeling structure and a base material overlaying mechanism, and wherein base material overlaying mechanism is a pair of to the press bonding roller rolling, and wherein at least one press bonding roller is warm-up mill.

31. 1 kinds of solvent-free dual-component polyurethane synthetic leather, is characterized in that, adopt the roller coating formula preparation method of the solvent-free dual-component polyurethane synthetic leather described in claim 1 or 2 to be prepared from.