CN102677482B - Environment-friendly waterborne polyurethane suede leather with high permeability and preparation method of environment-friendly waterborne polyurethane suede leather - Google Patents
Environment-friendly waterborne polyurethane suede leather with high permeability and preparation method of environment-friendly waterborne polyurethane suede leather Download PDFInfo
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Abstract
The invention relates to environment-friendly waterborne polyurethane suede leather with high permeability and a preparation method of the environment-friendly waterborne polyurethane suede leather. The suede leather comprises velvet knit base fabric and waterborne polyurethane slurry coated on the base fabric; the waterborne polyurethane slurry comprises the following ingredients in parts by weight: 80-150 parts of waterborne polyurethane resin, 20-150 parts of water, 0-8 parts of water-based paste and 0.5-6.0 parts of water-based additives. The preparation method comprises the steps of: a) coating the waterborne polyurethane slurry mixed and prepared according to parts by weight on the velvet knit base fabric, b) smoothly scrapping the surface of the coated product by a scraper, c) baking and sizing by a baking and setting machine, and d) polishing double sides by a sueding machine to prepare the suede leather. The suede leather disclosed by the invention not only has a velvet appearances and good handfeeling of leather and microfiber leather and has excellent air permeability, and common leather material and synthetic leather material have no excellent air permeability.
Description
Technical field
The invention belongs to artificial leather, synthetic leather industry in industry light industry textile industry field, relate in particular to the environment-friendly water-based polyurethane matte of a kind of high vapor-permeable type synthetic leather and preparation method thereof.
Background technology
Superfine fiber chemical leather is the most high-grade in current artificial leather, synthetic leather industry, is also the product that approaches most the high technology content of corium.It has excellent handle, physical property and the fine and smooth suede matter outward appearance of the corium that can match in excellence or beauty completely.But use solvent type polyurethane resin that must be a large amount of as conventional synthetic leather and organic solvent are as main raw material, this is just causing day by day serious impact to the destruction of ecological environment, meanwhile, cannot become real ecological environment-friendly type product and fancy price must be subject to certain restrictions its practical application.
The production and processing manufacture process of solvent-borne type matte microfiber synthetic leather is extremely complicated and huge, comprised from nonwoven production to resin-coating, then to decrement, dyeing, sanding, the normally production process such as oil, soften.Also to face in addition two Important Project of solvent recovery and waste water control.
Other matte synthetic leather is mainly also to take solvent borne polyurethane as main raw material, the simple napping machine of take weave cotton cloth as base material carry out dual coating and coordinate solidify, washing, oven dry, sanding, the conventional synthetic leather wet processing such as change colour complete, limitation is still the inadequate and lasting destructiveness to ecological environment of the feature of environmental protection of actual use.
Therefore, trade barrier and the consumer of artificial leather synthetic leather in environmental protection is to facilitate synthetic leather product of new generation in the inexorable trend of market development to the more and more higher quality requirements of product.
Summary of the invention
Technical problem to be solved by this invention is: a kind of high vapor-permeable type environment-friendly water-based polyurethane matte synthetic leather and method for making are provided, be intended to propose a kind of environment-friendly water-based polyurethane resin that uses completely for slurry, the preparation method of the matte synthetic leather that the napping class knitted cloth of take is base material.
In order to solve the problems of the technologies described above, the present invention by the following technical solutions:
The environment-friendly water-based polyurethane matte of a kind of high vapor-permeable type synthetic leather, it is characterized in that: comprise the knitting base cloth of napping class and be coated in the aqueous polyurethane slurry on base cloth, described aqueous polyurethane slurry comprises the composition of following weight portion: 80～150 parts of waterborne polyurethane resins; 20～150 parts, water; 0～8 part of aqueous color paste; 0.5～6.0 part of aqueous promoter.
The knitting base cloth of described napping class is to take warp knitting cloth or the weft-knitted fabric that the long fibre of terylene carries out knitting type processing and carry out two-sided napping as raw material.
Described waterborne polyurethane resin is common polyether-type, polyester-type and polyether polyester mixed type, aliphatic or aromatic series.
Described aqueous color paste adopts the aqueous pigment cream of polyurethane system.
Described aqueous promoter is one or more in water-based thickener, aqueous foaming agent, water-based foam stabilizer, aqueous dispersion.
Described water-based thickener is one or more in polyacrylate, polyvinylpyrrolidone, non-ionic water-soluble polyurethane association type emulsion.
Described aqueous foaming agent is the water-soluble blowing agent of stearic acid amine.
Described water-based foam stabilizer is the water-soluble foam stabiliser of butanedioic acid salt.
Described aqueous dispersion is a kind of in hydrophily acrylic copolymer, hydrophobic acrylic acid's analog copolymer.
A preparation method for the environment-friendly water-based polyurethane matte of high vapor-permeable type synthetic leather, the steps include:
A) on the knitting base cloth of napping class, apply the aqueous polyurethane slurry that preparation mixes by weight;
B) by scraper, coated product surface blade coating is smooth;
C) with drying and setting machine, carry out drying and shaping;
D) with roughing-up machine, carry out two-sided polishing, make matte synthetic leather.
Further, the aqueous polyurethane slurry of step in a) is to flood or the starching mode of roller coat is evenly coated on the knitting base cloth of napping class, and aqueous polyurethane slurry is the state of foaming slurry or common slurry.
Further, step b) be with scraper, to wipe off and make surface more smooth in the unnecessary slurry in surface the knitting base cloth of napping class that has applied aqueous polyurethane slurry, the Surface Contact of scraper and cloth is 0～90 ° of angle.
Further, step c) in, bake out temperature is controlled at 100～150 ℃, and the speed of a motor vehicle is controlled at 3～15m/min, and the time is controlled at 3～8min, requires fully dry.
Further, steps d) the mill skin in is that the semi-finished product tow sides after drying are all carried out to distinguishing light mill or reface, and final requirement is that the product surface velvet after mill skin is fine and smooth.
Further, step a) in, on the knitting base cloth of napping class, apply aqueous polyurethane slurry, employing is flooded mode, the mode of multiple tracks roller coat of extruding or is adopted roller coat to add the mode that dipping combines and carries out starching in impregnating groove, and the gap length of compression roller adopts the scope adjustment of 0.3～1.8mm.
In sum, the present invention compared with prior art has the following advantages:
1, matte synthetic leather of the present invention not only has the suede matter outward appearance of corium and superfiber leather and good feel, also has very excellent permeability simultaneously, and this is that conventional cortical material and synthetic leather material do not have.
2, preparation method's process of the environment-friendly water-based polyurethane matte of high vapor-permeable type of the present invention synthetic leather is simple and practical, easy to operate.And whole flow process do not used any organic solvent, be cleaner production and ecological, environmental protective truly.
3, the environment-friendly water-based polyurethane matte of high vapor-permeable type of the present invention synthetic leather environmental-protecting performance is excellent, not containing organic solvents such as DMF, MEK, TOL, IPA, indices meets the environmental requirement of European Union and the U.S., is the green ecological product that can feel at ease to remove trade barriers.
The specific embodiment
Below by specific embodiment, technical scheme of the present invention is described further, but embodiment to understand the present invention, and can not limit the present invention, the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Table one: composition (weight portion) and the requirement of the aqueous polyurethane slurry in embodiment
In the present embodiment, the consumption of each composition can not limit the scope of the invention, and for a person skilled in the art, can, according to its common practise and conventional means, can analyze raw material and the consumption of used aqueous polyurethane and each composition.
The knitting base cloth of napping class of the present invention is to take warp knitting cloth or the weft-knitted fabric that the long fibre of terylene carries out knitting type processing and carry out two-sided napping as raw material.
The present invention's waterborne polyurethane resin used all belongs to anionic polyurethane resin, and waterborne polyurethane resin can be existing common polyether-type, polyester-type and polyether polyester mixed type, can be also existing aliphatic and aromatic series.The solid content of resin is between 20 ~ 60%, and the modulus of resin, between 1 ~ 10Mpa, is selected existing market sell goods according to the size of molecular weight.
Aqueous color paste in the present embodiment is the mill base good with waterborne polyurethane resin Miscibility, adopts the aqueous pigment cream of polyurethane system.As JS500/C, the JS200 etc. of the production of Zhejiang Rake coating material Co., Ltd.
Blowing agent in the present embodiment is the water-soluble blowing agent of stearic acid amine, and foam stabilizer is the water-soluble foam stabiliser of butanedioic acid salt.The code name being provided by Ningbo fore-telling Saite Chemical Co., Ltd. is provided for blowing agent and foam stabilizer is SR and STA product.
Thickener in the present embodiment is one or more in polyacrylate, polyvinylpyrrolidone, non-ionic water-soluble polyurethane association type emulsion.The code name that can adopt Yantai Hua Da Chemical Co., Ltd. to provide is DZC-240 product.
Dispersant in the present embodiment is a kind of in hydrophily acrylic copolymer, hydrophobic acrylic acid's analog copolymer.The code name that can adopt Tongxiang Rake coating material Co., Ltd to provide is RF7000 product.
Preparation method of the present invention, the steps include:
A, on the knitting base cloth of napping class, apply the aqueous polyurethane slurry that preparation mixes by weight: aqueous polyurethane slurry is to flood or the starching mode of roller coat is evenly coated on the knitting base cloth of napping class, and aqueous polyurethane slurry is the state of foaming slurry or common slurry.On the knitting base cloth of napping class, apply aqueous polyurethane slurry, employing is flooded mode, the mode of multiple tracks roller coat of extruding or is adopted roller coat to add the mode that dipping combines and carries out starching in impregnating groove, and the gap length of compression roller adopts the scope adjustment of 0.3～1.8mm.
B, coated product surface blade coating is smooth by scraper: wipe off and make surface more smooth in the unnecessary slurry in surface with scraper the knitting base cloth of napping class that has applied aqueous polyurethane slurry, the Surface Contact of scraper and cloth is 0～90 ° of angle.The angle on scraper and base cloth surface can be selected according to actual needs, can select scraper and base cloth surface to be the different angles such as 0 °, 15 °, 45 ° or 90 °.
C, with drying and setting machine, carry out drying and shaping: bake out temperature is controlled at 100～150 ℃, and the speed of a motor vehicle is controlled at 3～15m/min, and the time is controlled at 3～8min, requires fully dry.
D, with roughing-up machine, carry out two-sided polishing, make matte synthetic leather.Mill skin be that the semi-finished product tow sides after drying are all carried out to distinguishing light mill or reface, final requirement is that the product surface velvet after mill skin is fine and smooth.
Embodiment 1
On production equipment, to grammes per square metre, be 400g/m
2black through compiling two-sided raising base cloth, carry out in advance along cant to the smooth processing of bristle.The slurry that embodiment in table one 1 is prepared injects respectively twice roller coat hopper, and gap with 0.75mm when the first roller coat, base cloth front is coated with to spreading mass, is 0 ° of angle scrapes gently plane surface with scraper and base cloth surface, under 125 ℃ of conditions, cures 2min.
Then with base reverse of the cloth, enter second roller coat, the gap with 0.75mm is coated with spreading mass to base cloth reverse side equally, is 15 ° of angles scrapes gently plane surface with scraper and base cloth surface, then entering expander forming machine dries, temperature is 140 ℃, and the speed of a motor vehicle is 6m/min, and the time is 7min.Product goes out cooling rolling after baking oven, becomes semi-finished product.
First suitable hair is carried out to sanding with 320 object abrasive bands in half-finished front, dynamics is to break up surperficial polyurethane and fine hair exquisiteness is advisable.Then according to the same manner, half-finished reverse side is carried out to sanding, finally obtain finished product matte synthetic leather.
Embodiment 2
On production equipment, to grammes per square metre, be 380g/m
2the two-sided raising base cloth of redness weft knitting carry out in advance along cant to the smooth processing of bristle.The slurry that embodiment in table one 2 is prepared injects respectively twice roller coat hopper, and gap with 0.85mm when the first roller coat, base cloth front is coated with to spreading mass, is 45° angle scrapes gently plane surface with scraper and base cloth surface, under 135 ℃ of conditions, cures 150s.
Then with base reverse of the cloth, enter second roller coat, the gap with 0.85mm is coated with spreading mass to base cloth reverse side equally, is 90 ° of angles scrapes gently plane surface with scraper and base cloth surface, then entering expander forming machine dries, temperature is 145 ℃, and the speed of a motor vehicle is 5m/min, and the time is 8min.Product goes out cooling rolling after baking oven, becomes semi-finished product.
First suitable hair is carried out to sanding with 600 object abrasive bands in half-finished front, dynamics is to break up surperficial polyurethane and fine hair exquisiteness is advisable.Then according to the same manner, half-finished reverse side is carried out to contrary hair to sanding, finally obtain finished product matte synthetic leather.
Embodiment 3
On production equipment, to grammes per square metre, be 320g/m
2the two-sided raising base cloth of white weft knitting carry out in advance along cant to the smooth processing of bristle.The slurry that embodiment in table one 3 is prepared injects the impregnating groove with compression roller, then with facing up of base cloth, enters in impregnating groove and respectively by three road compression rollers, and nip is respectively 0.75mm, 0.9mm, 1.3mm.The base cloth of first-class slurry is after going out impregnating groove, and positive and negative is 45° angle with two scrapers respectively, makes its surperficial blade coating smooth, with the top of scraper, contacts and is advisable gently with base cloth surface.Finally enter drying and setting machine, temperature is 140 ℃, and the speed of a motor vehicle is 5.5m/min, and the time is 8min, and product goes out baking oven cooling rolling after drying completely, become semi-finished product.
First suitable hair is carried out to sanding with 320 object abrasive bands in half-finished front, dynamics is to break up surperficial polyurethane and fine hair exquisiteness is advisable.Then according to the same manner, half-finished reverse side is carried out to contrary hair to sanding, finally obtain finished product matte synthetic leather.
Embodiment 4
On production equipment, to grammes per square metre, be 380g/m
2the two-sided raising base cloth of brown weft knitting carry out in advance along cant to the smooth processing of bristle.The slurry that embodiment in table one 4 is prepared injects the impregnating groove with compression roller, then with facing up of base cloth, enters in impregnating groove and respectively by three road compression rollers, and nip is respectively 0.75mm, 0.9mm, 1.5mm.The base cloth of first-class slurry is after going out impregnating groove, and positive and negative is 60 ° of angles with two scrapers respectively, makes its surperficial blade coating smooth, and the top of scraper contacts and produces slight radian with base cloth surface with moderate dynamics and is advisable.Finally enter drying and setting machine, temperature is 145 ℃, and the speed of a motor vehicle is 6.5m/min, and the time is 7min, and product goes out baking oven cooling rolling after drying completely, become semi-finished product.
First suitable hair is carried out to sanding with 400 object abrasive bands in half-finished front, dynamics is to break up surperficial polyurethane and fine hair exquisiteness is advisable.Then according to the same manner, half-finished reverse side is carried out to contrary hair to sanding, finally obtain finished product matte synthetic leather.
According to above-described embodiment, the made environment-friendly water-based polyurethane matte of high vapor-permeable type synthetic leather is carried out to the detection of related physical mechanical performance and chemical environmental-protecting performance aspect, concrete outcome is as follows:
Specific embodiment described in the invention is only that the present invention's spirit is exemplified to explanation.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but not containing departing from spirit of the present invention or exceeding the defined scope of appended claims.
Although the present invention has been made a detailed description and has confirmed some specific embodiments, for this area technical staff expertly, only otherwise leaving the spirit and scope of the present invention can make various changes or revise and be inevitable.
Claims (9)
1. the preparation method of the environment-friendly water-based polyurethane matte of a high vapor-permeable type synthetic leather, it is characterized in that: described synthetic leather comprises the knitting base cloth of napping class and is coated in the aqueous polyurethane slurry on base cloth, the knitting base cloth of described napping class is to take warp knitting cloth or the weft-knitted fabric that the long fibre of terylene carries out knitting type processing and carry out two-sided napping as raw material, and described aqueous polyurethane slurry comprises the composition of following weight portion: 80～150 parts of waterborne polyurethane resins; 20～150 parts, water; 0～8 part of aqueous color paste; 0.5～6.0 part of aqueous promoter; The modulus of described waterborne polyurethane resin is 1～10MPa, and the step of its preparation method is:
A) on the knitting base cloth of napping class, apply the aqueous polyurethane slurry that preparation mixes by weight;
B) by scraper, coated product surface blade coating is smooth;
C) with drying and setting machine, carry out drying and shaping;
D) with roughing-up machine, carry out two-sided polishing, make matte synthetic leather;
Wherein, in step a), on the knitting base cloth of napping class, apply aqueous polyurethane slurry, adopt mode, the mode of multiple tracks roller coat of dipping extruding in impregnating groove or adopt roller coat to add the mode that dipping combines and carry out starching, the gap length of compression roller adopts the scope adjustment of 0.3～1.8mm;
Step b) is with scraper, to wipe off and make surface more smooth in the unnecessary slurry in surface the knitting base cloth of napping class that has applied aqueous polyurethane slurry, and the Surface Contact of scraper and cloth is 0～90
0angle;
In step c), bake out temperature is controlled at 100～150 ℃, and the speed of a motor vehicle is controlled at 3～15m/min, and the time is controlled at 3～8min, requires fully dry.
2. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 1 synthetic leather, is characterized in that: described waterborne polyurethane resin is common polyether-type, polyester-type and polyether polyester mixed type, aliphatic or aromatic series.
3. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 1 and 2 synthetic leather, is characterized in that: described aqueous color paste adopts the aqueous pigment cream of polyurethane system.
4. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 1 and 2 synthetic leather, is characterized in that: described aqueous promoter is one or more in water-based thickener, aqueous foaming agent, water-based foam stabilizer, aqueous dispersion.
5. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 4 synthetic leather, is characterized in that: described water-based thickener is one or more in polyacrylate, polyvinylpyrrolidone, non-ionic water-soluble polyurethane association type emulsion.
6. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 4 synthetic leather, is characterized in that: described aqueous foaming agent is the water-soluble blowing agent of stearic acid amine.
7. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 4 synthetic leather, is characterized in that: described water-based foam stabilizer is the water-soluble foam stabiliser of butanedioic acid salt.
8. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 4 synthetic leather, is characterized in that: described aqueous dispersion is a kind of in hydrophily acrylic copolymer, hydrophobic acrylic acid's analog copolymer.
9. the preparation method of the environment-friendly water-based polyurethane matte of high vapor-permeable type according to claim 1 synthetic leather, it is characterized in that: the polishing in step d) is that the semi-finished product tow sides after drying are all carried out to distinguishing light mill or reface, final requirement is that the product surface velvet after polishing is fine and smooth.
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| CN201210164124.4A CN102677482B (en) | 2012-05-21 | 2012-05-21 | Environment-friendly waterborne polyurethane suede leather with high permeability and preparation method of environment-friendly waterborne polyurethane suede leather |
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| CN201210164124.4A CN102677482B (en) | 2012-05-21 | 2012-05-21 | Environment-friendly waterborne polyurethane suede leather with high permeability and preparation method of environment-friendly waterborne polyurethane suede leather |
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| CN102409552B (en) * | 2011-09-02 | 2014-04-16 | 福建宝利特集团有限公司 | Preparation method of environment-friendly foamed artificial leather |
| CN102418284B (en) * | 2011-09-02 | 2013-09-11 | 福建宝利特集团有限公司 | Preparation method of water-soluble polyurethane leather beth |
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