CN103710995B - Waterborne synthetic leather and production line, production method - Google Patents
Waterborne synthetic leather and production line, production method Download PDFInfo
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- CN103710995B CN103710995B CN201310669041.5A CN201310669041A CN103710995B CN 103710995 B CN103710995 B CN 103710995B CN 201310669041 A CN201310669041 A CN 201310669041A CN 103710995 B CN103710995 B CN 103710995B
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Abstract
The present invention proposes a kind of Waterborne synthetic leather and production line thereof, and it uses four paintings four to dry technique, respectively water-base resin coating and frothed aqueous resinous coat in the middle of molding.The production procedure of integration, and there is advantage more stable, in hgher efficiency, it also avoid the problems such as the blocked up drying efficiency brought of surface layer is low, crease easily.By by each drying baker subregion, controlling the temperature of different isothermal region, dry uniform, steady, good drying effect.This synthetic leather is five-layer structure, efficiently solves the aberration problem that big pattern embossing brings.Meanwhile, present invention also offers the production method of this Waterborne synthetic leather.
Description
Technical field
The present invention relates to the dry production technology of a kind of Waterborne synthetic leather, particularly relate to production line and the production method of Waterborne synthetic leather.
Background technology
Waterborne synthetic leather is generally the four-layer structure of surface layer-foaming layer-tack coat-base fabric, uses the production technology of three-coat three-baking.CN201010245381.1 discloses the production method of a kind of Waterborne synthetic leather, and the method can be summarized as three painting four bakings, including the slurry containing surface layer waterborne polyurethane resin being coated in release paper surface and being dried formation surface layer；Use foaming machine by the slurry containing expansion type waterborne polyurethane resin and air mixed foaming, then the slurry after foaming is coated in described facing surface and is dried formation middle foaming layer；The adhesive containing gluing waterborne polyurethane resin is used to be fitted with base fabric on the surface of described foaming layer and be dried.Being affected by drying process, surface thickness is limited, 0.02-0.05 millimeter, when complex pattern embossing, easily exposes middle foaming layer, forms aberration and bring substandard products.This technique limits the application in terms of big pattern synthetic leather.
The production of synthetic leather has to pass through repeatedly pasting and drying and processing just can obtain finished product.Wherein, an important step during drying technology is synthetic leather manufacturing process.Conventional synthesis leather dry process production line is for designed by oiliness synthetic leather slurry application and drying requirement, it is difficult to adapt to the requirement of aqueous ecological synthetic leather.By resins synthesis technical limitations, existing commercially available water-base resin contains the water of 50-70%, the evaporation latent heat of water is far above chemical solvents such as dimethylformamides, so, under the conditions of equal process hides, use water-base resin to produce synthetic leather ratio and use oleoresin production synthetic leather to need more energy to dry leather goods.Tradition tanning production line uses hot-air convection drying mode, during drying, the surface of coating can first be heated film forming, the moisture of centre then breaks through surface volatilization in further thermal histories, epithelium can be caused to shape become, and then cause easy-peel phenomenon and pin-hole phenomena very universal, and some process hides release paper stricture of vagina cannot be processed at all.
CN201010245381.1 discloses a kind of Waterborne synthetic leather.Corresponding to this, CN201010242049.X discloses a kind of dry method production line of water-based ecological synthetic leather, and this production line sets four independent baking oven systems, and three are coated with platform and a waterborne polyurethane foaming machine.Oven body frenulum has infrared drying equipment, in order to the independent temperature controlling baking oven.The patent provides the temperature controlled concrete scheme of dry method, solve Waterborne synthetic leather be heated inequality problem.This production line limits length and the temperature range of four baking ovens, the temperature value interval by controlling different temperatures, reduces the possibility of inequality of being heated.But the temperature control scheme that this patent provides is the most coarse, it is impossible to accurately controlling the temperature at each position, still have wrinkling possibility, drying efficiency is relatively low.
Therefore, it is necessary to improve prior art further.
Summary of the invention
The present invention proposes the production line of a kind of Waterborne synthetic leather, uses four to be coated with four baking production technologies, controls the oven temperatures of synthetic leather production process further, reduces wrinkling, the raising work efficiency of Waterborne synthetic leather.
The technical scheme is that and be achieved in that:
A kind of production line of Waterborne synthetic leather, it is characterized in that including: multiple actuating devices for transmitting release paper or base fabric, be coated with platform, laminating platform for the resin-coated baking oven of baking water and laminating base fabric with water-base resin tack coat for coat water-base resin coating in release paper, wherein
Described painting platform is coated with platform, the second painting platform, the 3rd painting platform and the 4th painting platform by first and forms, described first is coated with platform is used for coating water-base resin surface layer, described second is coated with platform is used for coating water-base resin intermediate layer, described 3rd is coated with platform is used for coating water-base resin foaming layer, described 4th is coated with platform is used for coating water-base resin tack coat
Described baking oven is made up of the first baking oven, the second baking oven, the 3rd baking oven and the 4th baking oven, described first baking oven is coated with platform and described second described first and is coated with between platform, described second baking oven is coated with platform and the described 3rd described second and is coated with between platform, described 3rd baking oven is coated with platform and the described 4th the described 3rd and is coated with between platform, 4th is coated with platform is connected to described laminating platform, described laminating platform is connected to described 4th baking oven, wherein
The a length of 18m to 23m of described second baking oven.
In the production line of the Waterborne synthetic leather of the present invention, a length of 20m of described second baking oven, this second baking oven is divided into four isothermal intervals that length is equal, is provided with thermal insulation layer between each described temperature-controlled area.Wherein, it is 90 DEG C, 105 DEG C, 120 DEG C that the temperature that isothermal is interval sets gradually.
In the production line of the Waterborne synthetic leather of the present invention, a length of 10m to 20m of described first baking oven, a length of 15m to 25m of the 3rd baking oven, a length of 30m to 40m of the 4th baking oven.
In the production line of the Waterborne synthetic leather of the present invention, a length of 15m of described first baking oven, this first baking oven is divided into three isothermal intervals that length is equal.Wherein, it is 90 DEG C, 100 DEG C, 110 DEG C, 115 DEG C that the temperature that isothermal is interval sets gradually.
In the production line of the Waterborne synthetic leather of the present invention, a length of 20m of described 3rd baking oven, the 3rd baking oven is divided into four isothermal intervals that length is equal.Wherein, it is 80 DEG C, 90 DEG C, 110 DEG C, 100 DEG C that the temperature that isothermal is interval sets gradually.
In the production line of the Waterborne synthetic leather of the present invention, a length of 35m of described 4th baking oven, the 4th baking oven is divided into five isothermal intervals, and length is followed successively by 5m, 5m, 5m, 15m and 5m.Wherein, it is 120 DEG C, 130 DEG C, 140 DEG C, 125 DEG C, 120 DEG C that the temperature that isothermal is interval sets gradually.
The production method of a kind of Waterborne synthetic leather, it is characterised in that comprise the following steps:
Configuration surface layer slurry, is coated in this surface layer slurry in release paper, forms water-base resin surface layer, dries this water-base resin surface layer；
Configuration intermediate layer slurry, is coated in this intermediate layer slurry on described water-base resin surface layer, forms water-base resin intermediate layer, dry this water-base resin intermediate layer；
Configuration foaming layer slurry, is coated in this foaming layer slurry on described water-base resin intermediate layer, forms water-base resin foaming layer, dries this water-base resin foaming layer；
Configuration tack coat slurry, is coated in this tack coat slurry in described water-base resin foaming layer, forms water-base resin tack coat, is fitted in base fabric by this water-base resin tack coat, dries this water-base resin tack coat.
By weight percentage, described surface layer slurry by 35 parts of waterborne polyurethane resins, 65 parts of water, 0.8 part of thickening agent, 0.3 part of defoamer, 0.3 part of levelling agent, 1 cross-linking agent and 3.2 parts of aqueous color pastes form especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 1980 to 2100cps/20 DEG C and becomes use for synthetic leather surface layer slurry.
By weight percentage, described intermediate layer slurry is made up of 35 parts of waterborne polyurethane resins, 65 parts of water, 4 parts of wood powders, 0.38 part of thickening agent, 0.3 part of levelling agent, 1.5 parts of aqueous color pastes, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 3200 to 4000cps/20 DEG C and becomes use for synthetic leather intermediate layer slurry.
By weight percentage, described foaming layer slurry is by 60 parts of resins, 40 parts of water, 2.5 parts of foaming agent, 0.3 part of thickening agent, 2.5 parts of foam stabilisers, 12 parts of wood powders, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment to 1980 to 2100cps/20 DEG C becomes use for synthetic leather foaming layer slurry.
By weight percentage, described tack coat slurry by 35 parts of resins, 65 parts of water, 0.4 part of thickening agent, 0.3 part of defoamer, 1 especially cross-linking agent form, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment to 1000 to 2000cps/20 DEG C becomes use for synthetic leather tack coat slurry.
A kind of Waterborne synthetic leather, is composited by waterborne polyurethane resin surface layer, waterborne polyurethane resin intermediate layer, waterborne polyurethane resin foaming layer, waterborne polyurethane resin tack coat, and thickness ratio is for surface layer: intermediate layer: foaming layer: adhesive linkage=5: 5: 40: 12.
The production line of this Waterborne synthetic leather carried out an invention, has the advantages that employing four painting four baking technique, respectively water-base resin coating and frothed aqueous resinous coat in the middle of molding.The production procedure of integration, and there is advantage more stable, in hgher efficiency, it also avoid the problems such as the blocked up drying efficiency brought of surface layer is low, crease easily.By by each drying baker subregion, controlling the temperature of different isothermal region, dry uniform, steady, good drying effect.This synthetic leather is five-layer structure, efficiently solves the aberration problem that big pattern embossing brings.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the production line of the Waterborne synthetic leather of the present invention；
Fig. 2 is the schematic cross-section of the Waterborne synthetic leather of the present invention；
Fig. 3 is the production method schematic diagram of the Waterborne synthetic leather of the present invention；
Fig. 4 is the schematic diagram of first baking oven of the present invention.
Detailed description of the invention
Patents literature review:
201010245381.1 provide a kind of production method, and the method can be summarized as three painting four bakings, including the slurry containing surface layer waterborne polyurethane resin being coated in release paper surface and being dried formation surface layer；Use foaming machine by the slurry containing expansion type waterborne polyurethane resin and air mixed foaming, then the slurry after foaming is coated in described facing surface and is dried formation middle foaming layer；The adhesive containing gluing waterborne polyurethane resin is used to be fitted with base fabric on the surface of described foaming layer and be dried.Being affected by drying process, surface thickness is limited, 0.02-0.05 millimeter, when complex pattern embossing, easily exposes middle foaming layer, forms aberration and bring substandard products.This technique limits the application in terms of big pattern synthetic leather.
201010242049.X sets four independent baking oven systems, and three are coated with platform and a waterborne polyurethane foaming machine.Wherein, the first baking oven is mainly used in baking water ecological synthetic leather surface layer waterborne polyurethane resin coating；Second baking oven can be used for drying general use for synthetic leather intermediate layer waterborne polyurethane resin coating, can also be used for baking water polyurethane foam resin or PVC foam layer；3rd baking oven is mainly used in tack coat half dry doubling tanning technology；4th baking oven is mainly used in the drying after the material laminatings such as tack coat and base fabric.Main line designs three and is coated with platform, for starching and regulation coating layer thickness in leather making process.This patent mentions a problem: the production of synthetic leather has to pass through repeatedly pasting and drying and processing just can obtain finished product.Wherein, an important step during drying technology is synthetic leather manufacturing process.Conventional synthesis leather dry process production line is for designed by oiliness synthetic leather slurry application and drying requirement, it is difficult to adapt to the requirement of aqueous ecological synthetic leather.By resins synthesis technical limitations, existing commercially available water-base resin contains the water of 50-70%, the evaporation latent heat of water is far above chemical solvents such as dimethylformamides, so, under the conditions of equal process hides, use water-base resin to produce synthetic leather ratio and use oleoresin production synthetic leather to need more energy to dry leather goods.Tradition tanning production line uses hot-air convection drying mode, during drying, the surface of coating can first be heated film forming, the moisture of centre then breaks through surface volatilization in further thermal histories, epithelium can be caused to shape become, and then cause easy-peel phenomenon and pin-hole phenomena very universal, and some process hides release paper stricture of vagina cannot be processed at all.
201210263253.9 refer to one includes that double release paper pay-off machine, release paper splicing station, storage device, the first precision coating machine, the first drying oven, two roller coolers, the second precision coating machine, the first multilayer fold-back drying oven, four roller coolers, the 3rd precision coating machine, the second drying oven, automatic attaching put three painting four baking production lines of the compositions such as cloth apparatus, make-up machine, the second multilayer fold-back drying oven, multiple roll cooler, stripping off device, bead cutter.Patent uses " fold-back drying oven " extend baking oven length, make the goods time in baking oven longer, thus be dried with water-based product and foam characteristics adapts.The feature of fold-back drying oven is the number of plies increasing baking zone in the case of not increasing baking oven length, improves production efficiency.The goods of the bed of material can repeatedly come and go in an oven, and running length in an oven is equivalent to the length of several baking zone, it is ensured that being dried and foamed time of goods, improve production efficiency, it is ensured that quality of item, reduce floor space, reduce capital construction and equipment investment, increase economic efficiency.
201110216559.4 disclose a kind of Waterborne synthetic leather with dry sliding sense, the polyurethane foaming layer including Primary layer, being coated on base cloth layer, the aqueous polyurethane tack coat being coated on polyurethane foaming layer, the aqueous foaming resin bed being coated on polyurethane tack coat, the waterborne polyurethane resin layer that is coated on aqueous foaming resin bed, the modified polyurethane resin layer being coated on waterborne polyurethane resin layer, and the aqueous dry sliding sense process layer being coated on modified polyurethane resin layer.Synthetic leather is mainly made up of urethane resin layer and base cloth layer, the lines of synthetic leather depends on the lines of release paper, synthetic leather third dimension is poor, in order to make synthetic leather disclosure satisfy that, people are to break and the demand of pattern, often synthetic leather is embossed process technique, makes the leather surface of synthetic leather have irregular three-dimensional pattern.In prior art, synthetic leather is embossed process and there is a lot of technical difficulties, embossing processes the pattern visual weak effect obtained, and embossed technology needs equipment many, cost is high, processes, through stamp, the pattern retention time obtained shorter, fugitive color simultaneously, and in prior art, synthetic leather kishke feel is not strong, can not meet people to high-level requirement.This patent does not provide relevant preparation technology.
201220090281.0 disclose a kind of aqueous ecology wet-method synthetic leather, including aqueous PU surface layer, aqueous PU foam layer, aqueous PU tack coat and base fabric, lamellar composite successively.Described aqueous PU foam layer uses mechanical foaming form, can be substituted by aqueous PU middle level.Described aqueous PU foam layer uses mechanical foaming form, can be substituted by aqueous PU middle level, and described aqueous PU foam layer is aqueous polyurethane, is made up of resin 100 parts, foaming agent 2 parts, foam stabilizer 1 part, filler 5 parts, appropriate thickening agent and aqueous color paste.Aqueous PU surface layer is coated in release paper, carries out Drying and cooling process.Resin is added appropriate solid packing and foaming agent, foam stabilizer, under conditions of high-speed stirred, the requirement to viscosity according to ambient temperature and operational approach, add a certain amount of thickening agent, use air-driven machine foaming or high-speed stirred foaming, and technology is steeped in employing admittedly, the water-base resin making foaming good is coated on aqueous PU surface layer, carry out drying and processing, form the polyurethane cortex of porous, make the synthetic leather of production have preferable resilience and solid sense.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.The production line of this Waterborne synthetic leather of the present invention as shown in Figure 1, comprising: multiple actuating device for transmitting release paper or base fabric, be coated with platform, laminating platform for the resin-coated baking oven of baking water and laminating base fabric with water-base resin tack coat for coat water-base resin coating in release paper.
Described actuating device is made up of device for paper receiving 2, multiple chill roll, multiple driver and coiler 8.Described painting platform is coated with platform the 31, second painting platform the 41, the 3rd painting platform 51 by first and the 4th painting platform 61 forms.Described baking oven is made up of first baking oven the 32, second baking oven the 42, the 3rd baking oven the 52, the 4th baking oven 62.Release paper is placed on a sheet holding member 1, and this sheet holding member 1 connects device for paper receiving 2, and device for paper receiving is connected to the first painting platform 31, is coated with in platform 31 after upper layer slurry first, and driver 33 drives release paper to enter the first baking oven 32, and the surface layer after drying enters chill roll 34.After the cooling of cooled roller 34, enter the second painting platform 41.On in the second painting platform 41 after the slurry of intermediate layer, driver 43 drives release paper to enter the second baking oven 42, and the intermediate layer after drying enters chill roll 44.After the cooling of cooled roller 44, enter the 3rd painting platform 51.On in the 3rd painting platform 51 after foaming layer slurry, driver 53 drives release paper to enter the 3rd baking oven 52, and the foaming layer after drying enters chill roll 54.After the cooling of cooled roller 54, enter the 4th painting platform 61.On in the 4th painting platform 61 after tack coat slurry, enter laminating platform 65.Put cloth machine 7 and base fabric is entered laminating platform 65, laminating platform 65 compound base fabric and tack coat.After completing bonding, entering the 4th baking oven 62, dried Waterborne synthetic leather is lowered the temperature in chill roll 64, and last rolling device 8 is packed up.
With reference to Fig. 4, described first is coated with platform 31 is used for coating water-base resin surface layer, and a length of 10m to 20m(the present embodiment of described first baking oven 32 is 15m), this first baking oven 32 is divided into three isothermal intervals (such as Fig. 4) that length is equal.Wherein, it is 90 DEG C, 100 DEG C, 110 DEG C, 115 DEG C that the temperature that isothermal is interval sets gradually.In the present invention, the temperature of baking oven is controlled by infrared lamp 321, owing to baking oven and painting platform are by disclosed in prior art, to be not described in detail here.
Described second is coated with platform 41 is used for coating water-base resin intermediate layer, a length of 18m to 23m(the present embodiment of described second baking oven 42 is 20m), this second baking oven 42 is divided into four isothermal intervals that length is equal, is provided with thermal insulation layer between each described temperature-controlled area.Wherein, it is 90 DEG C, 105 DEG C, 120 DEG C that the temperature that isothermal is interval sets gradually.
Described 3rd is coated with platform 51 is used for coating water-base resin foaming layer, a length of 15m to 25m of the 3rd baking oven 52, (the present embodiment is 20m), and the 3rd baking oven 52 is divided into four isothermal intervals that length is equal, is provided with thermal insulation layer between each described temperature-controlled area.Wherein, it is 80 DEG C, 90 DEG C, 110 DEG C, 100 DEG C that the temperature that isothermal is interval sets gradually.
Specifically, the foaming layer slurry effect suction premixed device by screw pump, simultaneously, compressed air passes through vacuum filter, the air mass flow being controlled to enter premixed device by glass rotors gas part effusion meter is 3.45 liters/min, entering back into frothing head after slurry mixes the thick foam of generation with air, in frothing head, foam is refined by slurry and total volume of air by 1:5 volume before and after foaming, last foam output slurry.
Described 4th is coated with platform 61 is used for coating water-base resin tack coat, a length of 30m to 40m(the present embodiment of 4th baking oven 62 is 35m), 4th baking oven 62 is divided into five isothermal intervals, is provided with thermal insulation layer between each described temperature-controlled area, and length is followed successively by 5m, 5m, 5m, 15m and 5m.Wherein, it is 120 DEG C, 130 DEG C, 140 DEG C, 125 DEG C, 120 DEG C that the temperature that isothermal is interval sets gradually.
The Waterborne synthetic leather production line of the present invention uses four painting four baking techniques, this synthetic leather is formed by waterborne polyurethane resin surface layer 01, waterborne polyurethane resin intermediate layer 02, waterborne polyurethane resin foaming layer 03, waterborne polyurethane resin tack coat 04 and composite for base fabric, and thickness ratio is for surface layer: intermediate layer: foaming layer: adhesive linkage=5: 5: 40: 12.
For Waterborne synthetic leather and the production method thereof of the apparent understanding present invention, three embodiments presented below, this production method uses the Waterborne synthetic leather production line shown in present embodiment, especially with baking oven and the painting platform of this production line.
Embodiment one
S11: configuration surface layer slurry.By weight percentage, described surface layer slurry is by 35 parts of waterborne polyurethane resin (surface layer waterborne polyurethane resins, model: MCKT-725A), 65 parts of water, 0.8 part of thickening agent, 0.3 part of defoamer, 0.3 part of levelling agent, 1 cross-linking agent and 3.2 parts of aqueous color pastes compositions especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 2000cps/20 DEG C and becomes use for synthetic leather surface layer slurry.
S12: be coated in release paper by this surface layer slurry, forms water-base resin surface layer, dries this water-base resin surface layer.This release paper uses the DE90 release paper that Warren company of the U.S. produces, and coating thickness is 5, and driver transfer rate in the first baking oven is 10m/min.
S13: configuration intermediate layer slurry.By weight percentage, described intermediate layer slurry is by 35 parts of waterborne polyurethane resin (intermediate layer waterborne polyurethane resins, model: MCKT-727), 65 parts of water, 4 parts of wood powders, 0.38 part of thickening agent, 0.3 part of levelling agent, 1.5 parts of aqueous color pastes compositions, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 3500cps/20 DEG C and becomes use for synthetic leather intermediate layer slurry.
S14: be coated on water-base resin surface layer by this intermediate layer slurry, forms water-base resin intermediate layer, dries this water-base resin surface layer.Coating thickness is 5, and driver transfer rate in the first baking oven is 13m/min.
S15: configuration foaming layer slurry.By weight percentage, described foaming layer slurry is by 60 parts of resin (foaming layer waterborne polyurethane resins, model: MCKT-205), 40 parts of water, 2.5 parts of foaming agent, 0.3 part of thickening agent, 2.5 parts of foam stabilisers, 12 parts of wood powders, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather foaming layer slurry to 2000cps/20 DEG C.
S16: be coated on water-base resin intermediate layer by this foaming layer slurry, forms water-base resin foaming layer, dries this water-base resin foaming layer.Coating thickness is 40, and driver transfer rate in the first baking oven is 10m/min.
S17: configuration tack coat slurry.By weight percentage, described tack coat slurry is by 35 parts of resin (tack coat waterborne polyurethane resins, model: MCKT-716), 65 parts of water, 0.4 part of thickening agent, 0.3 part of defoamer, 1 cross-linking agent composition especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather tack coat slurry to 1500cps/20 DEG C.
S18: be coated in described water-base resin foaming layer by this tack coat slurry, forms water-base resin tack coat, is fitted in base fabric by this water-base resin tack coat, dries this water-base resin tack coat.Coating thickness is 12, and driver transfer rate in the first baking oven is 10m/min.
S19: after being cooled to room temperature, makes release paper separate with synthetic leather by coiler, trimming rolling obtains the Waterborne synthetic leather of the present invention.
Embodiment two
S21: configuration surface layer slurry.By weight percentage, described surface layer slurry is by 30 parts of waterborne polyurethane resin (surface layer waterborne polyurethane resins, model: MCKT-725A), 65 parts of water, 1 part of thickening agent, 0.3 part of defoamer, 0.5 part of levelling agent, 1 cross-linking agent and 3.2 parts of aqueous color pastes compositions especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 2100cps/20 DEG C and becomes use for synthetic leather surface layer slurry.
S22: be coated in release paper by this surface layer slurry, forms water-base resin surface layer, dries this water-base resin surface layer.This release paper uses the DE90 release paper that Warren company of the U.S. produces, and coating thickness is 5, and driver transfer rate in the first baking oven is 12m/min.
S23: configuration intermediate layer slurry.By weight percentage, described intermediate layer slurry is by 30 parts of waterborne polyurethane resin (intermediate layer waterborne polyurethane resins, model: MCKT-727), 65 parts of water, 3 parts of wood powders, 0.3 part of thickening agent, 0.3 part of levelling agent, 2 parts of aqueous color pastes compositions, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 4000cps/20 DEG C and becomes use for synthetic leather intermediate layer slurry.
S24: be coated on water-base resin surface layer by this intermediate layer slurry, forms water-base resin intermediate layer, dries this water-base resin surface layer.Coating thickness is 5, and driver transfer rate in the first baking oven is 13m/min.
S25: configuration foaming layer slurry.By weight percentage, described foaming layer slurry is by 50 parts of resin (foaming layer waterborne polyurethane resins, model: MCKT-205), 40 parts of water, 3 parts of foaming agent, 0.5 part of thickening agent, 3 parts of foam stabilisers, 15 parts of wood powders, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather foaming layer slurry to 1980cps/20 DEG C.
S26: be coated on water-base resin intermediate layer by this foaming layer slurry, forms water-base resin foaming layer, dries this water-base resin foaming layer.Coating thickness is 40, and driver transfer rate in the first baking oven is 12m/min.
S27: configuration tack coat slurry.By weight percentage, described tack coat slurry is by 35 parts of resin (tack coat waterborne polyurethane resins, model: MCKT-716), 65 parts of water, 0.5 part of thickening agent, 0.5 part of defoamer, 1 cross-linking agent composition especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather tack coat slurry to 1000cps/20 DEG C.
S28: be coated in described water-base resin foaming layer by this tack coat slurry, forms water-base resin tack coat, is fitted in base fabric by this water-base resin tack coat, dries this water-base resin tack coat.Coating thickness is 12, and driver transfer rate in the first baking oven is 12m/min.
S29: after being cooled to room temperature, makes release paper separate with synthetic leather by coiler, trimming rolling obtains the Waterborne synthetic leather of the present invention.
Embodiment three
S31: configuration surface layer slurry.By weight percentage, described surface layer slurry is by 40 parts of waterborne polyurethane resin (surface layer waterborne polyurethane resins, model: MCKT-725A), 60 parts of water, 0.5 part of thickening agent, 0.3 part of defoamer, 0.3 part of levelling agent, 1 cross-linking agent and 3.2 parts of aqueous color pastes compositions especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 1980cps/20 DEG C and becomes use for synthetic leather surface layer slurry.
S32: be coated in release paper by this surface layer slurry, forms water-base resin surface layer, dries this water-base resin surface layer.This release paper uses the DE90 release paper that Warren company of the U.S. produces, and coating thickness is 5, and driver transfer rate in the first baking oven is 10m/min.
S33: configuration intermediate layer slurry.By weight percentage, described intermediate layer slurry is by 40 parts of waterborne polyurethane resin (intermediate layer waterborne polyurethane resins, model: MCKT-727), 60 parts of water, 4 parts of wood powders, 0.3 part of thickening agent, 0.3 part of levelling agent, 2 parts of aqueous color pastes compositions, this component carries out thickening under dispersion machine stirs and compounds, and viscosity is adjusted to 3200cps/20 DEG C and becomes use for synthetic leather intermediate layer slurry.
S34: be coated on water-base resin surface layer by this intermediate layer slurry, forms water-base resin intermediate layer, dries this water-base resin surface layer.Coating thickness is 5, and driver transfer rate in the first baking oven is 15m/min.
S35: configuration foaming layer slurry.By weight percentage, described foaming layer slurry is by 60 parts of resin (foaming layer waterborne polyurethane resins, model: MCKT-205), 30 parts of water, 2.5 parts of foaming agent, 0.3 part of thickening agent, 2.5 parts of foam stabilisers, 10 parts of wood powders, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather foaming layer slurry to 2000cps/20 DEG C.
S36: be coated on water-base resin intermediate layer by this foaming layer slurry, forms water-base resin foaming layer, dries this water-base resin foaming layer.Coating thickness is 40, and driver transfer rate in the first baking oven is 11m/min.
S37: configuration tack coat slurry.By weight percentage, described tack coat slurry is by 40 parts of resin (tack coat waterborne polyurethane resins, model: MCKT-716), 65 parts of water, 0.3 part of thickening agent, 0.3 part of defoamer, 1 cross-linking agent composition especially, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment becomes use for synthetic leather tack coat slurry to 2000cps/20 DEG C.
S38: be coated in described water-base resin foaming layer by this tack coat slurry, forms water-base resin tack coat, is fitted in base fabric by this water-base resin tack coat, dries this water-base resin tack coat.Coating thickness is 12, and driver transfer rate in the first baking oven is 10m/min.
S39: after being cooled to room temperature, makes release paper separate with synthetic leather by coiler, trimming rolling obtains the Waterborne synthetic leather of the present invention.
The four painting four baking techniques of the present invention and each composition of layer and temperature are main, other features that are undisclosed or that carefully state, with reference to existing Waterborne synthetic leather production line, such as the partial content of document 201010245381.1 (101941321A), 201010242049.X (101942768A) and 201210263253.9 (102765242A) etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (3)
1. the production line of a Waterborne synthetic leather, it is characterized in that including: multiple actuating devices for transmitting release paper or base fabric, be coated with platform, laminating platform for the resin-coated baking oven of baking water and laminating base fabric with water-base resin tack coat for coat water-base resin coating in release paper, wherein
Described painting platform is coated with platform, the second painting platform, the 3rd painting platform and the 4th painting platform by first and forms, described first is coated with platform is used for coating water-base resin surface layer, described second is coated with platform is used for coating water-base resin intermediate layer, described 3rd is coated with platform is used for coating water-base resin foaming layer, described 4th is coated with platform is used for coating water-base resin tack coat
Described baking oven is made up of the first baking oven, the second baking oven, the 3rd baking oven and the 4th baking oven, described first baking oven is coated with platform and described second described first and is coated with between platform, described second baking oven is coated with platform and the described 3rd described second and is coated with between platform, described 3rd baking oven is coated with platform and the described 4th the described 3rd and is coated with between platform, 4th is coated with platform is connected to described laminating platform, described laminating platform is connected to described 4th baking oven, wherein
The a length of 15m of described first baking oven, this first baking oven is divided into three isothermal intervals that length is equal,
The a length of 20m of described second baking oven, this second baking oven is divided into four isothermal intervals that length is equal,
The a length of 20m of described 3rd baking oven, the 3rd baking oven is divided into four isothermal intervals that length is equal,
The a length of 35m of described 4th baking oven, the 4th baking oven is divided into five isothermal intervals, and length is followed successively by 5m, 5m, 5m, 15m and 5m.
2. the production method of the production line of Waterborne synthetic leather described in a claim 1, it is characterised in that comprise the following steps:
Configuration surface layer slurry, is coated in this surface layer slurry in release paper, forms water-base resin surface layer, dries this water-base resin surface layer；
Configuration intermediate layer slurry, is coated in this intermediate layer slurry on described water-base resin surface layer, forms water-base resin intermediate layer, dry this water-base resin intermediate layer；
Configuration foaming layer slurry, is coated in this foaming layer slurry on described water-base resin intermediate layer, forms water-base resin foaming layer, dries this water-base resin foaming layer；
Configuration tack coat slurry, is coated in this tack coat slurry in described water-base resin foaming layer, forms water-base resin tack coat, is fitted in base fabric by this water-base resin tack coat, dries this water-base resin tack coat, wherein,
Described surface layer slurry by 35 parts of waterborne polyurethane resins, 65 parts of water, 0.8 part of thickening agent, 0.3 part of defoamer, 0.3 part of levelling agent, 1 cross-linking agent and 3.2 parts of aqueous color pastes form especially, this component carries out thickening under dispersion machine stirs and compounds, viscosity is adjusted to 1980 to 2100cps/20 DEG C and becomes use for synthetic leather surface layer slurry
Described intermediate layer slurry is made up of 35 parts of waterborne polyurethane resins, 65 parts of water, 4 parts of wood powders, 0.38 part of thickening agent, 0.3 part of levelling agent, 1.5 parts of aqueous color pastes, this component carries out thickening under dispersion machine stirs and compounds, viscosity is adjusted to 3200 to 4000cps/20 DEG C and becomes use for synthetic leather intermediate layer slurry
Described foaming layer slurry is by 60 parts of resins, 40 parts of water, 2.5 parts of foaming agent, 0.3 part of thickening agent, 2.5 parts of foam stabilisers, 12 parts of wood powders, this component carries out thickening under dispersion machine stirs and compounds, viscosity adjustment becomes use for synthetic leather foaming layer slurry to 1980 to 2100cps/20 DEG C
Described tack coat slurry by 35 parts of resins, 65 parts of water, 0.4 part of thickening agent, 0.3 part of defoamer, 1 especially cross-linking agent form, this component carries out thickening under dispersion machine stirs and compounds, and viscosity adjustment to 1000 to 2000cps/20 DEG C becomes use for synthetic leather tack coat slurry.
3. the Waterborne synthetic leather produced by method described in claim 2, it is characterized in that, being formed by waterborne polyurethane resin surface layer, waterborne polyurethane resin intermediate layer, waterborne polyurethane resin foaming layer, waterborne polyurethane resin tack coat and composite for base fabric, thickness ratio is for surface layer: intermediate layer: foaming layer: adhesive linkage=5: 5: 40: 12.
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| JP6836735B2 (en) * | 2018-12-04 | 2021-03-03 | Dic株式会社 | Synthetic leather |
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