CN106939517A - A kind of high-performance WPU superfine fiber chemical leathers and its clean preparation method - Google Patents
A kind of high-performance WPU superfine fiber chemical leathers and its clean preparation method Download PDFInfo
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- CN106939517A CN106939517A CN201710214631.7A CN201710214631A CN106939517A CN 106939517 A CN106939517 A CN 106939517A CN 201710214631 A CN201710214631 A CN 201710214631A CN 106939517 A CN106939517 A CN 106939517A
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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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Abstract
A kind of high-performance WPU superfine fiber chemical leathers and its clean preparation method, make superfine fiber synthetic leather base cloth be impregnated by rubbing the dipping tank of liquid equipped with contracting, then enter back into continous way boarding machine, dry superfine fiber synthetic leather base cloth, obtain contracting and rub base fabric；Using the synthetic leather dry process production line equipped with PUR blade coating equipments, by WPU slurries blade coating in release liners, dry, WPU films are formed in release liners, then PUR is coated with WPU films, then is rubbed base fabric with contracting and fit, and cooling is wound, curing is placed, high-performance WPU superfine fiber chemical leathers are obtained after peeling off release liners.The present invention rubs technology using contracting, increase substantially the flexibility, gas permeability and water vapor permeability of superfine fiber synthetic leather base cloth, again by the way that release liners are transfer coated and PUR scratches complex technique, WPU coatings are compounded on superfine fiber chemical leather base material, obtain soft, mechanical property and the good WPU superfine fiber chemical leathers of performance.
Description
Technical field
The present invention relates to superfine fiber chemical leather technical field, more particularly to a kind of high-performance WPU superfine fiber chemical leathers
And its clean preparation method.
Background technology
Due to for producing the raw material skin resource-constrained of natural leather, and natural leather production be a high energy consumption,
The process of high pollution, can bring great pollutional load to environment.In recent years, the developed country such as European Union to natural leather in itself
Security it is also proposed new standard, Cr (VI), azo dyes, pentachlorophenol (PCP) present in strict limitation natural leather
And the toxic chemical such as free formaldehyde.From the perspective of raw material skin resource, environmental protection, product safety and market, natural skin
The production of leather and using all suffer from greatly challenge.
Based on above reason, countries in the world are all accelerating the new material of the new replacement natural leather of exploitation.Wherein ultra-fine fibre
The exploitation of synthetic leather is tieed up, 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, polyurethane slurry of the dipping with open-celled structure, is processed through a series of complex technique.Because the diameter of superfine fibre is several
Nano-grade size is reached, there is huge specific surface area, it is extremely similar to the pencil collagenous fibres in natural leather, physical
Energy aspect can be compared favourably with natural leather, and it is completed by the process of " imitated " to " conversion ", as replacement natural leather
Optimal material.
China is the big producer of natural leather in the world, production ranking the first in the world, yet with 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 into
The experience of work(, when Japanese leather industry fails, takes the lead in developing high performance superfine fiber chemical leather, day has been filled up in time
The blank left during 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, its production ranking the first in the world.Synthetic leather artificial leather
Information Network data display, China's artificial leather synthetic leather consumption figure in 2013 is 42.92 hundred million square metres, and 10.42% is increased compared with last year.
The driving made the transition based on synthetic leather industry industrial upgrading, the demand speedup of high-end superfine fiber chemical leather is flat apparently higher than industry
Equal level.Superfine fiber chemical leather in 2011 enters national product and counts catalogue, and annual total import and export volume 36.36 hundred million is beautiful
Member, 10.7 hundred million meters of its middle outlet (56.96 ten thousand tons), has increased by 12.96% on a year-on-year basis, export volume account for the 23.36% of total output, go 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 of development 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 speed is up to
More than 20%.
However, the superfine fiber chemical leather product of China, has been at the states such as the low and middle-grade positions of like product, and Japan
Family compares, and still has sizable gap.Market by early stage is teaching and research and analyzes, and to accelerate China's superfine fiber chemical leather production
Product lifting, technological progress and industrial upgrading, it is necessary to solve main engineering challenge.At present, matte type superfine fibre is synthesized
Leather product is compared with natural leather, however it remains following not enough：(1) face technique is made generally using solvent borne polyurethane release liners to turn
Coating is moved, a large amount of solvents can be used, can generation environment pollution；(2) product pliability is not enough, 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.
The content of the invention
It is an object of the invention to provide a kind of high-performance WPU superfine fiber chemical leathers and its clean preparation method.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of clean preparation method of high-performance WPU superfine fiber chemical leathers, comprises the following steps：
(1) base fabric contracting is rubbed：Superfine fiber synthetic leather base cloth is impregnated by rubbing the dipping tank of liquid equipped with contracting, then enter back into
Continous way boarding machine, under conditions of 55~75 DEG C, dries superfine fiber synthetic leather base cloth, completes contracting and rubs process, is contracted
Rub base fabric；
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, WPU slurries are scratched
In release liners, into baking oven, dry, WPU films are formed in release liners, PUR is then coated with by WPU using PUR blade coating equipments
On film, then rub base fabric with contracting and fit, cooling winding places curing, obtain compound base fabric, obtained after peeling off release liners at room temperature
High-performance WPU superfine fiber chemical leathers.
Further improve of the invention is that superfine fiber synthetic leather base cloth closes for figured type superfine fibre in step (1)
Into leather base cloth, non-figured type superfine fiber synthetic leather base cloth or tangerine valve type superfine fiber synthetic leather base cloth.
Further improve of the invention is that the temperature that liquid is rubbed in contracting in step (1) is 30~35 DEG C.
Further improve of the invention is that contracting is rubbed liquid and is prepared by the following method in step (1)：By with mass fraction
Meter, 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 is sub-
70~100 parts of mixing of 0.5~1 part of sulfuric acid fish oil and water, stir, obtain contracting and rub liquid.
Further improve of the invention is that the pickup for controlling contracting to rub liquid by roll when being impregnated in step (1) is super
The 80~90% of fine fibre synthetic leather base cloth quality.
Further improve of the invention is, when being scratched in step (2), and coating weight is 90~180g/ ㎡, dry temperature
For 100~140 DEG C.
Of the invention further improve is, when being coated with step (2), and temperature is 75~185 DEG C, coating weight is 80~
220g/㎡；The time for placing curing is 24~48h.
Further improve of the invention is that WPU slurries are made by procedure below in step (2)：In terms of mass fraction,
By 100 parts of WPU surface layer resins, 4~8 parts of aqueous color paste, particle diameter is less than after 0.5~1 part of mixing of makrolon micro mist of 2000 mesh
Stir, obtain WPU slurries.
Of the invention further improve be, PUR blade coating equipments include press disc type PUR hot melt adhesive machines and with PUR doctor knife coaters
Two parts；Press disc type PUR hot melt adhesive machines include charging basket and heating part, heating part be aluminium alloy heating dish, charging basket built with
PUR, heating dish is pressed into PUR charging baskets from the top down when using, and heating dish is located above PUR, when heating dish is heated, in charging basket
One layer of top PUR is contacted and melted with heating dish；PUR doctor knife coaters are the doctor knife coaters with heated constant temperature function, including with adding
The hopper and scraper of hot heat insulation function, after the PUR of liquid enters feed chute, liquid are kept under constant temperature, by liquid
PUR is uniformly coated on WPU films.
A kind of high-performance WPU superfine fiber chemical leathers, the synthetic leather has two layer composite structure, and upper strata is aqueous poly- ammonia
Ester, lower floor is superfine fiber synthetic leather base cloth, and peel load is more than 35N/20mm, and tear load is more than 30N/mm, permeable gas
More than 1mg/cm2H, surface abrasion resistance is more than 4 grades.
Compared with prior art, the device have the advantages 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%, pliability improves 20~50%, and water absorption rate improves 5~10%, water vapor permeability
Improve 20~50%.
Second, release liners are transfer coated and reaction type polyurethane hot-melt adhesive (abbreviation PUR) scratches complex technique, will be aqueous poly-
Urethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather base material, not only technical process environmental protection, and can be effective
Decorative pattern in release liners is transferred on WPU coatings.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 films, there is also chemical adhesion effect, make its bonding strength high, water resistance
Splendid, immersion 10h will not come unglued in 95 DEG C of hot water；(2) release liners transfer decorative pattern good simulation, decorative pattern is clearly fine；(3)
Makrolon micro mist is added in WPU slurries, the water resistance and wearability of WPU coatings can be effectively improved.
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 by the way that release liners are transfer coated and reaction type polyurethane hot-melt adhesive (abbreviation PUR) scratches complex technique, will be aqueous
Polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather base material, obtains soft, mechanical property and usability
The good WPU superfine fiber chemical leathers of energy.
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 produces effective contraction, makes the increase of its thickness, and can increase the hydrophily in superfine fiber synthetic leather base cloth, makes its water absorption rate
Improved with water vapor permeability, so as 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 disperseed and lubricated, and in continous way boarding machine
Rub line passage and fall 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 strata is aqueous poly-
Urethane (abbreviation WPU) coating, lower floor is superfine fiber synthetic leather base cloth, and outward 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 skill is combined by transfer coated scratched with reaction type polyurethane hot-melt adhesive (abbreviation PUR) of release liners
Art, aqueous polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather base material, obtains soft, mechanical property
Can be with the good WPU superfine fiber chemical leathers of performance.High-performance WPU superfine fiber chemical leather production process wiper rings
Protect, soft plentiful, surface texture exquisiteness is true to nature, peel load is more than 35N/20mm, and tear load is more than 30N/mm, permeable
It is quick to take offense in 1mg/cm2H, surface abrasion resistance is more than 4 grades, can make high-grade environmentally friendly vamp material, case and bag and use and sofa covering material
Material.
Embodiment
Below by 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：Superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by being contracted equipped with 30 DEG C, and pass through roll
The pickup for controlling contracting to rub liquid 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, superfine fiber synthetic leather base cloth is thoroughly dried, complete 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
Into 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 in 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, 70 parts of mixing of 0.5 part of sulfited fish oil and water are stirred until property
Material dissolving, you can obtain contracting and rub liquid.
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, coating weight is 180g/
Under conditions of ㎡, WPU slurries are scratched in release liners using scraper, into baking oven, thoroughly dried under conditions of 100 DEG C,
WPU films are formed in release liners, then under conditions of 75 DEG C, coating weight are 220g/ ㎡, are applied PUR using PUR blade coating equipments
On cloth WPU films, then rub base fabric with contracting and fit, cooling winding places curing 24h, obtain compound base fabric, peels off release at room temperature
High-performance WPU superfine fiber chemical leathers are obtained after paper.
WPU slurries are made by procedure below：In terms of mass fraction, by 100 parts of WPU surface layer resins, 4 parts of aqueous color paste,
Particle diameter stirs after being less than 0.5 part of mixing of makrolon micro mist of 2000 mesh, obtains WPU slurries.
Embodiment 2
(1) base fabric contracting is rubbed：Superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by being contracted equipped with 35 DEG C, and pass through roll
The pickup for controlling contracting to rub liquid 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, superfine fiber synthetic leather base cloth is thoroughly dried, complete 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
Into 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 in 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, the 100 parts of mixing of 0.7 part of sulfited fish oil and water, stirring is until all
Material dissolution, you can obtain contracting and rub liquid.
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, coating weight is 150g/
Under conditions of ㎡, WPU slurries are scratched in release liners using scraper, into baking oven, thoroughly dried under conditions of 140 DEG C,
WPU films are formed in release liners, then under conditions of 185 DEG C, coating weight are 80g/ ㎡, are applied PUR using PUR blade coating equipments
On cloth WPU films, then rub base fabric with contracting and fit, cooling winding places curing 48h, obtain compound base fabric, peels off release at room temperature
High-performance WPU superfine fiber chemical leathers are obtained after paper.
WPU slurries are made by procedure below：In terms of mass fraction, by 100 parts of WPU surface layer resins, 5 parts of aqueous color paste,
Particle diameter stirs after being less than 0.7 part of mixing of makrolon micro mist of 2000 mesh, obtains WPU slurries.
Embodiment 3
(1) base fabric contracting is rubbed：Superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by being contracted equipped with 32 DEG C, and pass through roll
The pickup for controlling contracting to rub liquid 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, superfine fiber synthetic leather base cloth is thoroughly dried, complete 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
Into 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 in terms of mass fraction, by 7 parts of myrica extract, valonea extract 1.5
Part, 0.3 part of sodium citrate, 3 parts of sulfated castor oil, the 80 parts of mixing of 0.9 part of sulfited fish oil and water, stirring is until all
Material dissolution, you can obtain contracting and rub liquid.
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, coating weight is 110g/
Under conditions of ㎡, WPU slurries are scratched in release liners using scraper, into baking oven, thoroughly dried under conditions of 110 DEG C,
WPU films are formed in release liners, then under conditions of 110 DEG C, coating weight are 140g/ ㎡, using PUR blade coating equipments by PUR
Be coated with WPU films, then rub base fabric with contracting and fit, cooling winding is placed cure 30h at room temperature, obtains compound base fabric, peel off from
High-performance WPU superfine fiber chemical leathers are obtained after type paper.
WPU slurries are made by procedure below：In terms of mass fraction, by 100 parts of WPU surface layer resins, 7 parts of aqueous color paste,
Particle diameter stirs after being less than 0.8 part of mixing of makrolon micro mist of 2000 mesh, obtains WPU slurries.
Embodiment 4
(1) base fabric contracting is rubbed：Superfine fiber synthetic leather base cloth is rubbed the dipping tank of liquid by being contracted equipped with 33 DEG C, and pass through roll
The pickup for controlling contracting to rub liquid 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, superfine fiber synthetic leather base cloth is thoroughly dried, complete 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
Into 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 in 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, 90 parts of mixing of 1 part of sulfited fish oil and water are stirred until all materials
Dissolving, you can obtain contracting and rub liquid.
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, coating weight is 90g/ ㎡
Under conditions of, WPU slurries are scratched in release liners using scraper, into baking oven, thoroughly dried under conditions of 125 DEG C,
WPU films are formed in release liners, then under conditions of 150 DEG C, coating weight are 180g/ ㎡, are applied PUR using PUR blade coating equipments
On cloth WPU films, then rub base fabric with contracting and fit, cooling winding places curing 41h, obtain compound base fabric, peels off release at room temperature
High-performance WPU superfine fiber chemical leathers are obtained after paper.
WPU slurries are made by procedure below：In terms of mass fraction, by 100 parts of WPU surface layer resins, 8 parts of aqueous color paste,
Particle diameter stirs after being less than 1 part of mixing of makrolon micro mist of 2000 mesh, obtains WPU slurries.
PUR blade coating equipments in the present invention include press disc type PUR hot melt adhesive machines and with PUR doctor knife coater two parts；Press disc type
PUR hot melt adhesive machines include charging basket and heating part, and heating part is an aluminium alloy heating dish, and charging basket adds built with PUR when using
Hot plate is pressed into PUR charging baskets from the top down, and heating dish is located above PUR, when heating dish is heated, 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 into by gear pump in the hopper of PUR doctor knife coaters；
Using press disc type PUR hot melt adhesive machines, the PUR of bottom is not heated now in charging basket, how many PUR is needed during production, how much is fusing
PUR, there is O-ring sealing between heating dish and charging basket inwall so that the liquid PUR of fusing will not be with air contact, it is ensured that PUR
Use condition requirement；PUR doctor knife coaters are the doctor knife coaters with heated constant temperature function, and critical piece is with heating and heat preserving function
Hopper and scraper, after the PUR of liquid enters feed chute, liquid are kept under constant temperature, the spacing by scraper and WPU films is big
Small control coating weight, the PUR of liquid is uniformly coated on WPU films.
WPU surface layer resins in the present invention are 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 by the way that release liners are transfer coated and reaction type polyurethane hot-melt adhesive (abbreviation PUR) scratches complex technique, by water
Property polyurethane (abbreviation WPU) coating is compounded on superfine fiber chemical leather base material, obtains soft, mechanical property and is used
WPU superfine fiber chemical leathers of good performance.High-performance WPU superfine fiber chemical leather production process clean environment firendlies, feel is soft
Soft plentiful, surface texture exquisiteness is true to nature, and peel load is more than 35N/20mm, and tear load is more than 30N/mm, and water vapor permeability is more than
1mg/cm2H, surface abrasion resistance is more than 4 grades, can make high-grade environmentally friendly vamp material, case and bag and use and sofa skin material.
Claims (10)
1. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers, it is characterised in that comprise the following steps：
(1) base fabric contracting is rubbed：Superfine fiber synthetic leather base cloth is impregnated by rubbing the dipping tank of liquid equipped with contracting, then enter back into continuous
Formula boarding machine, under conditions of 55~75 DEG C, dries superfine fiber synthetic leather base cloth, completes contracting and rubs process, obtains contracting and rub base
Cloth；
(2) scratch compound：Using the synthetic leather dry process production line equipped with PUR blade coating equipments, first, by WPU slurries blade coating from
On type paper, into baking oven, dry, WPU films formed in release liners, then PUR is coated with WPU films using PUR blade coating equipments,
Rub base fabric with contracting again to fit, cooling winding places curing, obtain compound base fabric, high property is obtained after peeling off release liners at room temperature
Can WPU superfine fiber chemical leathers.
2. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
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 leathers according to claim 1, its feature exists
In the temperature that liquid is rubbed in contracting in step (1) is 30~35 DEG C.
4. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
In contracting is rubbed liquid and is prepared by the following method in step (1)：By in terms of mass fraction, by 5~10 parts of myrica extract, valonea extract 1
~2 parts, 0.1~0.3 part of sodium citrate, 2~3 parts of sulfated castor oil, 0.5~1 part of sulfited fish oil and water 70~100
Part mixing, stirs, obtains contracting and rub liquid.
5. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
The pickup for control contracting to rub liquid by roll when being impregnated in, step (1) be superfine fiber synthetic leather base cloth quality 80~
90%.
6. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
In when being scratched in step (2), coating weight is 90~180g/ ㎡, and dry temperature is 100~140 DEG C.
7. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
In when being coated with step (2), temperature is 75~185 DEG C, and coating weight is 80~220g/ ㎡；Place time of curing for 24~
48h。
8. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
In WPU slurries are made by procedure below in step (2)：In terms of mass fraction, by 100 parts of WPU surface layer resins, aqueous color paste 4
~8 parts, particle diameter stirs after being less than 0.5~1 part of mixing of makrolon micro mist of 2000 mesh, obtains WPU slurries.
9. a kind of clean preparation method of high-performance WPU superfine fiber chemical leathers according to claim 1, its feature exists
In, PUR blade coating equipments include press disc type PUR hot melt adhesive machines and with PUR doctor knife coater two parts；Press disc type PUR hot melt adhesive machines include
Charging basket and heating part, heating part are aluminium alloy heating dish, and charging basket is built with PUR, and heating dish is pressed into from the top down when using
In PUR charging baskets, heating dish is located above PUR, and when heating dish is heated, one layer of PUR of charging basket internal upper part is contacted and melted with heating dish
Change；PUR doctor knife coaters are the doctor knife coaters with heated constant temperature function, including hopper and scraper with heating and heat preserving function, work as liquid
The PUR of state enters after feed chute, and liquid is kept under constant temperature, and the PUR of liquid is uniformly coated on WPU films.
10. one kind is based on high-performance WPU superfine fiber chemical leathers made from any one production method in claim 1-9, its
It is characterised by, the synthetic leather has two layer composite structure, upper strata is aqueous polyurethane, and lower floor is superfine fiber synthetic leather base cloth,
Peel load is more than 35N/20mm, and tear load is more than 30N/mm, permeable quick to take offense in 1mg/cm2H, surface abrasion resistance is more than
4 grades.
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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 |
| CN112593421A (en) * | 2020-12-31 | 2021-04-02 | 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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| 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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