CN106939517B - A kind of high-performance WPU superfine fiber chemical leather and its clean preparation method - Google Patents
A kind of high-performance WPU superfine fiber chemical leather and its clean preparation method Download PDFInfo
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- CN106939517B CN106939517B CN201710214631.7A CN201710214631A CN106939517B CN 106939517 B CN106939517 B CN 106939517B CN 201710214631 A CN201710214631 A CN 201710214631A CN 106939517 B CN106939517 B CN 106939517B
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/121—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds
- D06N3/123—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds with polyesters
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
- D06N3/143—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer with polyurethanes and other polycondensation or polyaddition products, e.g. aminoplast
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- D06N2209/00—Properties of the materials
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- D06N2211/00—Specially adapted uses
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- D06N2211/28—Artificial leather
Abstract
A kind of high-performance WPU superfine fiber chemical leather and its clean preparation method make superfine fiber synthetic leather base cloth pass through the dipping tank dipping for rubbing liquid equipped with contracting, then enter back into continous way boarding machine, keep superfine fiber synthetic leather base cloth dry, obtain contracting and rub base fabric；Using the synthetic leather dry process production line that PUR blade coating equipment is housed, by WPU slurry blade coating in release paper, it is dry, WPU film is formed in release paper, then PUR is coated on WPU film, then is rubbed base fabric with contracting and be bonded, cooling winding, curing is placed, obtains high-performance WPU superfine fiber chemical leather after removing release paper.The present invention rubs technology using contracting, increase substantially the flexibility, gas permeability and water vapor permeability of superfine fiber synthetic leather base cloth, complex technique is scratched with PUR by the way that release paper is transfer coated again, WPU coating is compounded on superfine fiber chemical leather substrate, obtain soft, mechanical property and the good WPU superfine fiber chemical leather of service performance.
Description
Technical field
The present invention relates to superfine fiber chemical leather technical field, in particular to a kind of high-performance WPU superfine fiber chemical leather
And its clean preparation method.
Background technique
Due to be used to produce natural leather raw material skin resource it is limited, and the production of natural leather be a high energy consumption,
The process of high pollution can bring great pollutional load to environment.In recent years, the developed countries such as European Union are to natural leather itself
Safety also proposed new standard, stringent to limit Cr (VI), azo dyes, pentachlorophenol (PCP) present in natural leather
And the toxic chemicals such as free formaldehyde.From the perspective of raw material skin resource, environmental protection, product safety and market, natural skin
The production and use of leather all suffer from great challenge.
Based on the above reasons, countries in the world are all in the new material instead of natural leather for accelerating exploitation new.Wherein ultra-fine fibre
The exploitation for tieing up synthetic leather, can be rated as the model that new material is combined with each other.Superfine fiber chemical leather is non-woven for base with superfine fibre
Material impregnates the polyurethane slurry with open-celled structure, is process through a series of complex technique.Since the diameter of superfine fibre is several
Reach nano-grade size, there is huge specific surface area, it is extremely similar to the pencil collagenous fibres in natural leather, physical
Energy aspect can compare favourably with natural leather, it completes the process by " imitated " to " transformation ", becomes instead of natural leather
Optimal material.
China is the big producer of natural leather in the world, production ranking the first in the world, however due to raw material skin
Shortage and problem of environmental pollution, the continuous downturn of development of China leather industry are inevitable.Be worth we use for reference be Japan at
The experience of function takes the lead in developing high performance superfine fiber chemical leather, has filled up day in time when the decline of Japanese leather industry
The blank left when right Leather Industry decline, suddenly becomes the country the most advanced of superfine fiber chemical leather technology in the world, and
The high-end market of high-end superfine fiber chemical leather product is monopolized.
It is not unique, but has its counterpart, and China is also the big producer of synthetic leather, production ranking the first in the world.Synthetic leather artificial leather
Information network data shows that China's artificial leather synthetic leather consumption figure in 2013 is 42.92 hundred million square metres, increases by 10.42% compared with last year.
Based on the driving of synthetic leather industry industrial upgrading transition, it is flat that the demand speedup of high-end superfine fiber chemical leather is apparently higher than industry
It is horizontal.Superfine fiber chemical leather in 2011 enters national product statistics catalogue, annual 36.36 hundred million beauty of total import and export volume
Member, 10.7 hundred million meters of middle outlet (56.96 ten thousand tons), has increased by 12.96% on a year-on-year basis, export volume accounts for the 23.36% of total output, out
30.4 hundred million dollars of the volume of trade of mouth, increases by 35.11% on a year-on-year basis, has initially formed the history new stage for developing third generation product, and will
The bright spot of investment as new spectra.According to the analysis of artificial leather synthetic leather Professional Committee of Chinese Plastics processing industry association,
Domestic superfine fiber chemical leather effective capacity is about 1.2 hundred million square metres within 2013, and future market demand growth rate is up to
20% or more.
However, the superfine fiber chemical leather product in China, has been at the states such as low and middle-grade positions and the Japan of similar product
Family compares, and still has sizable gap.By the market of early period it is teaching and research and analysis, to accelerate China's superfine fiber chemical leather production
Product promotion, technological progress and industrial upgrading, it is necessary to solve main engineering challenge.Currently, flannelette type superfine fibre synthesizes
Leather product is compared with natural leather, however it remains following insufficient: (1) making face technique and generally use solvent borne polyurethane release paper turn
Coating is moved, will use a large amount of solvents, it can generation environment pollution；(2) product pliability is insufficient, and good hand feeling is poor；(3) product
Permeable gas it is smaller, cause sanitation performance poor；(4) feel and simulation quality of product surface are poor.
Summary of the invention
The object of the present invention is to provide a kind of high-performance WPU superfine fiber chemical leather and its clean preparation methods.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of clean preparation method of high-performance WPU superfine fiber chemical leather, comprising the following steps:
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is passed through the dipping tank dipping for rubbing liquid equipped with contracting, is then entered back into
Continous way boarding machine keeps superfine fiber synthetic leather base cloth dry under conditions of 55~75 DEG C, completes contracting and rubs process, is contracted
Rub base fabric；
(2) it scratches compound: using the synthetic leather dry process production line that PUR blade coating equipment is housed, firstly, WPU slurry is scratched
It is dry into baking oven in release paper, WPU film is formed in release paper, and PUR is then coated with by WPU using PUR blade coating equipment
On film, then base fabric being rubbed with contracting and is bonded, cooling winding places curing at room temperature, obtains compound base fabric, obtains after removing release paper
High-performance WPU superfine fiber chemical leather.
A further improvement of the present invention lies in that superfine fiber synthetic leather base cloth is the conjunction of figured type superfine fibre in step (1)
At leather base cloth, non-figured type superfine fiber synthetic leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
A further improvement of the present invention lies in that it is 30~35 DEG C that the temperature of liquid is rubbed in contracting in step (1).
It is prepared by the following method a further improvement of the present invention lies in that contracting in step (1) and rubbing liquid: by with mass fraction
Meter, it is sub- by 5~10 parts of myrica extract, 1~2 part of valonea extract, 0.1~0.3 part of sodium citrate, 2~3 parts of sulfated castor oil
0.5~1 part of sulfuric acid fish oil and 70~100 parts of water mixing, stir evenly, and obtain contracting and rub liquid.
A further improvement of the present invention lies in that it is super for rubbing the impregnation increment of liquid by roll control contracting when dipping in step (1)
The 80~90% of fine fibre synthetic leather base cloth quality.
A further improvement of the present invention lies in that coating weight is 90~180g/ ㎡, dry temperature in step (2) when blade coating
It is 100~140 DEG C.
A further improvement of the present invention lies in that step (2) in coating when, temperature be 75~185 DEG C, coating weight be 80~
220g/㎡；The time for placing curing is 24~48h.
A further improvement of the present invention lies in that WPU slurry is made by following procedure in step (2): in terms of mass fraction,
By 100 parts of WPU surface layer resin, 4~8 parts of aqueous color paste, after partial size is less than 0.5~1 part of polycarbonate micro mist mixing of 2000 mesh
It stirs evenly, obtains WPU slurry.
A further improvement of the present invention lies in that PUR blade coating equipment include press disc type PUR hot melt adhesive machine and with PUR doctor knife coater
Two parts；Press disc type PUR hot melt adhesive machine includes charging basket and heating part, and heating part is aluminium alloy heating dish, and charging basket is provided with
PUR, heating dish is pressed into from the top down in PUR charging basket when use, and heating dish is located above PUR, when heating dish heating, in charging basket
One layer of top PUR is contacted and is melted with heating dish；PUR doctor knife coater is the doctor knife coater with heated constant temperature function, including has and add
The hopper and scraper of hot heat insulation function keep liquid after the PUR of liquid enters hopper under constant temperature conditions, by liquid
PUR is uniformly coated on WPU film.
A kind of high-performance WPU superfine fiber chemical leather, the synthetic leather have two layer composite structure, and upper layer is aqueous poly- ammonia
Ester, lower layer are superfine fiber synthetic leather base cloth, and peel load is greater than 35N/20mm, and tearing load is greater than 30N/mm, permeable gas
Greater than 1mg/cm2H, surface abrasion resistance are greater than 4 grades.
Compared with prior art, the invention has the benefit that
First, rubbing liquid using contracting, technology is rubbed by contracting, so that the length reduction 5~10% of superfine fiber synthetic leather base cloth,
Reduced width 1~3%, thickness increase by 5~10%, and pliability improves 20~50%, and water absorption rate improves 5~10%, water vapor permeability
Improve 20~50%.
Second, release paper is transfer coated and reaction type polyurethane hot-melt adhesive (abbreviation PUR) scratches complex technique, it will be aqueous poly-
Urethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather substrate, not only technical process environmental protection, but also can be effective
Decorative pattern in release paper is transferred on WPU coating.Specific advantage is as follows: (1) PUR for superfine fiber synthetic leather base cloth and
, not only there is physics adhesive effect in the compound bonding of WPU film, there is also chemical adhesion effects, keep its adhesive strength high, water resistance
Splendid, impregnating 10h in 95 DEG C of hot water will not come unglued；(2) release paper shifts decorative pattern good simulation, and decorative pattern is clearly fine；(3)
Polycarbonate micro mist is added in WPU slurry, can effectively improve the water resistance and wearability of WPU coating.
Third, the present invention rubs technology using contracting, increase substantially the flexibility of superfine fiber synthetic leather base cloth, gas permeability and
Water vapor permeability, then complex technique is scratched with reaction type polyurethane hot-melt adhesive (abbreviation PUR) by the way that release paper is transfer coated, it will be aqueous
Polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather substrate, obtains soft, mechanical property and usability
It can good WPU superfine fiber chemical leather.
Further, liquid is rubbed using the contracting containing myrica extract, valonea extract, sulfated castor oil and sulfited fish oil
Carry out contracting to rub, action principle is as follows: (1) during contracting is rubbed, the tannin extract rubbed in liquid that contracts can make superfine fiber chemical leather base
Cloth generates effective contraction, increases its thickness, and can increase the hydrophily in superfine fiber synthetic leather base cloth, makes its water absorption rate
It is improved with water vapor permeability, to improve the sanitation performance of superfine fiber synthetic leather base cloth；(2) during contracting is rubbed, liquid is rubbed in contracting
In sulfated castor oil and sulfited fish oil fiber can be made effectively to be dispersed and be lubricated, and in continous way boarding machine
It rubs line channel and falls soft drying, can effectively improve the pliability of superfine fiber synthetic leather base cloth.
Synthetic leather produced by the invention, is a kind of flexible composite with two layer composite structure, and upper layer is aqueous poly-
Urethane (abbreviation WPU) coating, lower layer are superfine fiber synthetic leather base cloth, and appearance is similar to natural leather, soft plentiful, table
Face texture exquisiteness is true to nature.The invention rubs technology using special contracting, increase substantially superfine fiber synthetic leather base cloth flexibility,
Gas permeability and water vapor permeability, then compound skill is scratched with reaction type polyurethane hot-melt adhesive (abbreviation PUR) by the way that release paper is transfer coated
Aqueous polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather substrate, obtains soft, mechanical property by art
It can be with the good WPU superfine fiber chemical leather of service performance.High-performance WPU superfine fiber chemical leather production process wiper ring
It protects, soft plentiful, surface texture exquisiteness is true to nature, and peel load is greater than 35N/20mm, and tearing load is greater than 30N/mm, permeable
It is quick to take offense in 1mg/cm2H, surface abrasion resistance are greater than 4 grades, can make high-grade environmentally friendly vamp material, luggage use and sofa covering material
Material.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail, but the present invention is not only limited in these
Example.
Embodiment 1
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by contracting equipped with 30 DEG C, and is passed through roll
The impregnation increment that liquid is rubbed in control contracting is the 80% of superfine fiber synthetic leather base cloth quality, continous way boarding machine is entered back into, at 55 DEG C
Under the conditions of, it dries superfine fiber synthetic leather base cloth thoroughly, completes contracting and rub process, obtain contracting and rub base fabric；
Wherein, superfine fiber synthetic leather base cloth is figured type superfine fiber synthetic leather base cloth, the conjunction of non-figured type superfine fibre
At leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
The contracting is rubbed liquid and is prepared by the following method: by terms of mass fraction, by 5 parts of myrica extract, 1 part of valonea extract,
0.1 part of sodium citrate, 2 parts of sulfated castor oil, 0.5 part of sulfited fish oil and 70 parts of water mixing, stir until property
Material dissolution, can be obtained contracting and rubs liquid.
(2) it scratches compound: using the synthetic leather dry process production line that PUR blade coating equipment is housed, firstly, coating weight is 180g/
Under conditions of ㎡, WPU slurry is scratched in release paper using scraper, into baking oven, is thoroughly dried under conditions of 100 DEG C,
In release paper formed WPU film, then 75 DEG C, coating weight be 220g/ ㎡ under conditions of, PUR is applied using PUR blade coating equipment
On cloth WPU film, then base fabric being rubbed with contracting and is bonded, cooling winding places curing for 24 hours at room temperature, obtains compound base fabric, removes release
High-performance WPU superfine fiber chemical leather is obtained after paper.
WPU slurry is made by following procedure: in terms of mass fraction, by 100 parts of WPU surface layer resin, 4 parts of aqueous color paste,
Partial size obtains WPU slurry less than stirring evenly after 0.5 part of polycarbonate micro mist mixing of 2000 mesh.
Embodiment 2
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by contracting equipped with 35 DEG C, and is passed through roll
The impregnation increment that liquid is rubbed in control contracting is the 90% of superfine fiber synthetic leather base cloth quality, continous way boarding machine is entered back into, at 60 DEG C
Under the conditions of, it dries superfine fiber synthetic leather base cloth thoroughly, completes contracting and rub process, obtain contracting and rub base fabric；
Wherein, superfine fiber synthetic leather base cloth is figured type superfine fiber synthetic leather base cloth, the conjunction of non-figured type superfine fibre
At leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
The contracting is rubbed liquid and is prepared by the following method: by terms of mass fraction, by 10 parts of myrica extract, 2 parts of valonea extract,
0.2 part of sodium citrate, 2.5 parts of sulfated castor oil, 0.7 part of sulfited fish oil and 100 parts of water mixing, stirring is until all
Material dissolution can be obtained contracting and rub liquid.
(2) it scratches compound: using the synthetic leather dry process production line that PUR blade coating equipment is housed, firstly, coating weight is 150g/
Under conditions of ㎡, WPU slurry is scratched in release paper using scraper, into baking oven, is thoroughly dried under conditions of 140 DEG C,
In release paper formed WPU film, then 185 DEG C, coating weight be 80g/ ㎡ under conditions of, PUR is applied using PUR blade coating equipment
On cloth WPU film, then base fabric being rubbed with contracting and is bonded, cooling winding places curing 48h at room temperature, obtains compound base fabric, removes release
High-performance WPU superfine fiber chemical leather is obtained after paper.
WPU slurry is made by following procedure: in terms of mass fraction, by 100 parts of WPU surface layer resin, 5 parts of aqueous color paste,
Partial size obtains WPU slurry less than stirring evenly after 0.7 part of polycarbonate micro mist mixing of 2000 mesh.
Embodiment 3
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by contracting equipped with 32 DEG C, and is passed through roll
The impregnation increment that liquid is rubbed in control contracting is the 85% of superfine fiber synthetic leather base cloth quality, continous way boarding machine is entered back into, at 65 DEG C
Under the conditions of, it dries superfine fiber synthetic leather base cloth thoroughly, completes contracting and rub process, obtain contracting and rub base fabric；
Wherein, superfine fiber synthetic leather base cloth is figured type superfine fiber synthetic leather base cloth, the conjunction of non-figured type superfine fibre
At leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
The contracting is rubbed liquid and is prepared by the following method: by terms of mass fraction, by 7 parts of myrica extract, and valonea extract 1.5
Part, 0.3 part of sodium citrate, 3 parts of sulfated castor oil, 0.9 part of sulfited fish oil and 80 parts of water mixing, stirring is until all
Material dissolution can be obtained contracting and rub liquid.
(2) it scratches compound: using the synthetic leather dry process production line that PUR blade coating equipment is housed, firstly, coating weight is 110g/
Under conditions of ㎡, WPU slurry is scratched in release paper using scraper, into baking oven, is thoroughly dried under conditions of 110 DEG C,
WPU film is formed in release paper, then 110 DEG C, coating weight be 140g/ ㎡ under conditions of, using PUR blade coating equipment by PUR
Be coated on WPU film, then rub base fabric with contracting and be bonded, cooling winding places cure 30h at room temperature, obtains compound base fabric, remove from
High-performance WPU superfine fiber chemical leather is obtained after type paper.
WPU slurry is made by following procedure: in terms of mass fraction, by 100 parts of WPU surface layer resin, 7 parts of aqueous color paste,
Partial size obtains WPU slurry less than stirring evenly after 0.8 part of polycarbonate micro mist mixing of 2000 mesh.
Embodiment 4
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by contracting equipped with 33 DEG C, and is passed through roll
The impregnation increment that liquid is rubbed in control contracting is the 82% of superfine fiber synthetic leather base cloth quality, continous way boarding machine is entered back into, at 75 DEG C
Under the conditions of, it dries superfine fiber synthetic leather base cloth thoroughly, completes contracting and rub process, obtain contracting and rub base fabric；
Wherein, superfine fiber synthetic leather base cloth is figured type superfine fiber synthetic leather base cloth, the conjunction of non-figured type superfine fibre
At leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
The contracting is rubbed liquid and is prepared by the following method: by terms of mass fraction, by 8 parts of myrica extract, 1 part of valonea extract,
0.1 part of sodium citrate, 2 parts of sulfated castor oil, 1 part of sulfited fish oil and 90 parts of water mixing, stir until all materials
Dissolution, can be obtained contracting and rubs liquid.
(2) it scratches compound: using the synthetic leather dry process production line that PUR blade coating equipment is housed, firstly, coating weight is 90g/ ㎡
Under conditions of, WPU slurry is scratched in release paper using scraper, into baking oven, is thoroughly dried under conditions of 125 DEG C,
In release paper formed WPU film, then 150 DEG C, coating weight be 180g/ ㎡ under conditions of, PUR is applied using PUR blade coating equipment
On cloth WPU film, then base fabric being rubbed with contracting and is bonded, cooling winding places curing 41h at room temperature, obtains compound base fabric, removes release
High-performance WPU superfine fiber chemical leather is obtained after paper.
WPU slurry is made by following procedure: in terms of mass fraction, by 100 parts of WPU surface layer resin, 8 parts of aqueous color paste,
Partial size obtains WPU slurry less than stirring evenly after 1 part of polycarbonate micro mist mixing of 2000 mesh.
PUR blade coating equipment in the present invention include press disc type PUR hot melt adhesive machine and with PUR doctor knife coater two parts；Press disc type
PUR hot melt adhesive machine includes charging basket and heating part, and heating part is an aluminium alloy heating dish, and charging basket is provided with PUR, and when use adds
Hot plate is pressed into from the top down in PUR charging basket, and heating dish is located above PUR, when heating dish heating, only above one layer in charging basket
PUR is contacted with heating dish, is made up to fusing point and is melted, and the PUR after fusing is squeezed by gear pump in the hopper of PUR doctor knife coater；
Using press disc type PUR hot melt adhesive machine, the PUR of lower part is not heated at this time in charging basket, and when production needs how many PUR, and how much is fusing
PUR has O-ring sealing between heating dish and charging basket inner wall, so that the liquid PUR of fusing will not be contacted with air, ensure that PUR
Use condition requirement；PUR doctor knife coater is the doctor knife coater with heated constant temperature function, and main component is with heating and heat preserving function
Hopper and scraper keep liquid after the PUR of liquid enters hopper under constant temperature conditions, and the spacing by scraper and WPU film is big
Small control coating weight, the PUR of liquid is uniformly coated on WPU film.
WPU surface layer resin in the present invention is the aqueous PU dry method surface layer resin of Guangdong silver dollar environmental friendly material Co., Ltd
PU-209-2。
Superfine fiber synthetic leather base cloth in the present invention is after contracting is rubbed, and length reduction 5~10%, and reduced width 1~
3%, thickness increase by 5~10%, pliability raising 20~50%, water absorption rate raising 5~10%, water vapor permeability raising 20~
50%.
The present invention rubs technology using special contracting, increases substantially flexibility, the gas permeability of superfine fiber synthetic leather base cloth
And water vapor permeability, then complex technique is scratched with reaction type polyurethane hot-melt adhesive (abbreviation PUR) by the way that release paper is transfer coated, by water
Property polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather substrate, obtains soft, mechanical property and use
WPU superfine fiber chemical leather of good performance.High-performance WPU superfine fiber chemical leather production process clean and environmental protection, feel are soft
Soft plentiful, surface texture exquisiteness is true to nature, and peel load is greater than 35N/20mm, and tearing load is greater than 30N/mm, and water vapor permeability is greater than
1mg/cm2H, surface abrasion resistance are greater than 4 grades, can make high-grade environmentally friendly vamp material, luggage use and sofa skin material.
Claims (8)
1. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather, which comprises the following steps:
(1) base fabric contracting is rubbed: so that superfine fiber synthetic leather base cloth is passed through the dipping tank dipping for rubbing liquid equipped with contracting, is then entered back into continuous
Formula boarding machine keeps superfine fiber synthetic leather base cloth dry under conditions of 55~75 DEG C, completes contracting and rubs process, obtains contracting and rubs base
Cloth；Wherein, contracting is rubbed liquid and is prepared by the following method: by terms of mass fraction, by 5~10 parts of myrica extract, and valonea extract 1~2
Part, 0.1~0.3 part of sodium citrate, 2~3 parts of sulfated castor oil, 0.5~1 part of sulfited fish oil and 70~100 parts of water
Mixing, stirs evenly, and obtains contracting and rubs liquid；
(2) scratch it is compound: using be equipped with PUR blade coating equipment synthetic leather dry process production line, firstly, by WPU slurry blade coating from
It is dry into baking oven on type paper, WPU film is formed in release paper, and then PUR is coated on WPU film using PUR blade coating equipment,
It rubs base fabric with contracting again to be bonded, cooling winding places curing at room temperature, obtains compound base fabric, obtains high property after removing release paper
Energy WPU superfine fiber chemical leather, wherein WPU slurry is made by following procedure: in terms of mass fraction, by WPU surface layer resin
100 parts, 4~8 parts of aqueous color paste, partial size is obtained less than stirring evenly after 0.5~1 part of polycarbonate micro mist mixing of 2000 mesh
WPU slurry.
2. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In superfine fiber synthetic leather base cloth is figured type superfine fiber synthetic leather base cloth, the synthesis of non-figured type superfine fibre in step (1)
Leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
3. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In it is 30~35 DEG C that the temperature of liquid is rubbed in contracting in step (1).
4. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In, step (1) when dipping by the impregnation increment that liquid is rubbed in roll control contracting is superfine fiber synthetic leather base cloth quality 80~
90%.
5. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In in step (2) when blade coating, coating weight is 90~180g/ ㎡, and dry temperature is 100~140 DEG C.
6. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In in step (2) when coating, temperature is 75~185 DEG C, and coating weight is 80~220g/ ㎡；Place curing time be 24~
48h。
7. a kind of clean preparation method of high-performance WPU superfine fiber chemical leather according to claim 1, feature exist
In, PUR blade coating equipment include press disc type PUR hot melt adhesive machine and with PUR doctor knife coater two parts；Press disc type PUR hot melt adhesive machine includes
Charging basket and heating part, heating part are aluminium alloy heating dish, and charging basket is provided with PUR, and heating dish is pressed into from the top down when use
In PUR charging basket, heating dish is located above PUR, and when heating dish heating, one layer of PUR of charging basket internal upper part is contacted and melted with heating dish
Change；PUR doctor knife coater is the doctor knife coater with heated constant temperature function, and hopper and scraper including having heating and heat preserving function work as liquid
The PUR of state enters after hopper, keeps liquid under constant temperature conditions, and the PUR of liquid is uniformly coated on WPU film.
8. one kind is based on high-performance WPU superfine fiber chemical leather made from any one of claim 1-7 production method, special
Sign is that the synthetic leather has two layer composite structure, and upper layer is aqueous polyurethane, and lower layer is superfine fiber synthetic leather base cloth, stripping
It is greater than 35N/20mm from load, tearing load is greater than 30N/mm, permeable quick to take offense in 1mg/cm2H, surface abrasion resistance are greater than 4
Grade.
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| CN110281605A (en) * | 2019-06-26 | 2019-09-27 | 四川大学 | A kind of solvent-free heat discoloration shines synthetic leather and its manufacturing method |
| CN112593421B (en) * | 2020-12-31 | 2022-03-18 | 张家港嘉泰超纤科技有限公司 | Preparation method of high-performance crease-free mirror-surface superfine fiber synthetic leather |
| CN113062123A (en) * | 2021-03-30 | 2021-07-02 | 英德市匠心新材料股份有限公司 | High-solid-content mirror-surface PU leather and preparation method thereof |
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| CN102505521A (en) * | 2011-09-26 | 2012-06-20 | 陕西科技大学 | Method for dyeing superfine fibre synthetic leather by utilizing tannin extract |
| CN103451958A (en) * | 2013-08-27 | 2013-12-18 | 陕西科技大学 | After finishing method for improving compliance of superfine fiber synthetic leather |
| CN103981729A (en) * | 2014-05-07 | 2014-08-13 | 安安(中国)有限公司 | Aqueous polyurethane making method used for superfine fiber synthetic leather production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505521A (en) * | 2011-09-26 | 2012-06-20 | 陕西科技大学 | Method for dyeing superfine fibre synthetic leather by utilizing tannin extract |
| CN103451958A (en) * | 2013-08-27 | 2013-12-18 | 陕西科技大学 | After finishing method for improving compliance of superfine fiber synthetic leather |
| CN103981729A (en) * | 2014-05-07 | 2014-08-13 | 安安(中国)有限公司 | Aqueous polyurethane making method used for superfine fiber synthetic leather production |
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