CN103774455A - Water-based polyurethane superfine fiber synthetic leather and preparation method thereof - Google Patents
Water-based polyurethane superfine fiber synthetic leather and preparation method thereof Download PDFInfo
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- CN103774455A CN103774455A CN201210393400.4A CN201210393400A CN103774455A CN 103774455 A CN103774455 A CN 103774455A CN 201210393400 A CN201210393400 A CN 201210393400A CN 103774455 A CN103774455 A CN 103774455A
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Abstract
The invention relates to a water-based polyurethane superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps: 1) adding 4-8 parts by weight of a foaming agent, 50-200 parts by weight of water, 1-6 parts by weight of a foam stabilizing agent and 0-3 parts by weight of a water-based colorant into 120 parts by weight of a water-based anionic polyurethane impregnating slurry, and uniformly stirring at a high speed by a stirrer, to obtain a slurry; 2) impregnating a non-woven fabric in the slurry, scraping the surface flatly, and keeping a part of foam pores; 3) adopting a water-based solidification liquid to solidify water-based polyurethane of the impregnated non-woven fabric, and after the water-based polyurethane is solidified, forming foam pores; 4) after the water-based polyurethane resin is completely solidified, washing with water, drying by an infrared drying box, and thus obtaining base cloth; 5) carrying out an alkali deweighting process of the dried base cloth; 6) carrying out a posttreatment process of the base cloth obtained after the alkali deweighting process, and 7) preparing the synthetic leather from the obtained base cloth. The water-based polyurethane superfine fiber synthetic leather is prepared by the above preparation method.
Description
Technical field
The present invention relates to a kind of aqueous polyurethane superfine fiber synthetic leather and preparation method thereof, belong to synthetic leather production technical field.
Background technology
Synthetic Leather has been applied to the every field in people's life at present, numerous in variety, and its medium-to-high grade superfine fiber chemical leather is fast-developing in recent years with the outward appearance of its physical property advantage and artificial leather.The wet process technique of traditional superfine fiber chemical leather is take solvent borne polyurethane as dipping sizing agent immersion non-woven fabrics, then in DMF (dimethyl formamide) aqueous solution, solidify, extract out in hot toluene groove, washing is dried, a large amount of DMF, toluene are wherein used, all recovered solvent discharges with gas and waste water mode, contaminated environment.Simultaneously the sewage discharge regulation toluene of Environmental Protection in China portion to leather industry, DMF content respectively at 0.1mg/L, below 0.2mg/L.Although most of solvent can reclaim, the energy consumption that reclaims on the one hand solvent is also very high, still has on the other hand partial solvent to reclaim, and has been discharged in environment in the mode of gas and waste water.
Waterborne polyurethane resin is take water as decentralized medium, there is nontoxic, environmental protection, safety, the advantage such as do not fire, and be the best substitute products of solvent type resin.Research and the application of various countries to aqueous polyurethane has very large policy and financial support, China also drops into also larger in the research of waterborne polyurethane resin with application, but the application of waterborne polyurethane resin on synthetic leather some progress in recent years just comparatively speaking, main research concentrates on the surface finish of synthetic leather, only have water-based dry method to move the technology such as membrane technology and printing and be applied in actual production, aqueous polyurethane synthetic leather overall technology is developed also in the starting stage.Along with the development of waterborne polyurethane resin technology, properties of product improve, and international and domestic each relevant company also strengthened application study input in recent years.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of aqueous polyurethane superfine fiber synthetic leather and preparation method thereof is provided, there is microcellular structure to reach to prepare, and the object of its good hand touch and the higher synthetic leather of physical property.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of manufacture method of aqueous polyurethane superfine fiber synthetic leather, comprises the following steps:
1) by 4～8 parts of the foaming agents of following parts by weight, 1～6 part of foam stabilizer and 80～190 parts, water, 0～3 part of water stain, add in the water-based anion polyurethane dipping sizing agent of 120 parts of parts by weight, stir with homogenizer again, make the slurry that density is 250～550g/L;
2) in dipping tank, nonwoven fabric be impregnated in described slurry, surface strikes off, and pickup is 400～1200g/m
2, keep 40～85% abscess;
3), by the nonwoven fabric after dipping, in coagulating basin, through water-based solidification liquid solidified water based polyurethane, aqueous polyurethane solidifies and forms abscess simultaneously;
4), after waterborne polyurethane resin solidifies completely, in rinsing bowl, through washing, infrared drying oven is dried, and makes base cloth;
5) base cloth after oven dry, process caustic reduction processing in continuous or batch (-type) alkali deweighing machine;
6) again by the base cloth process aftertreatment technology after caustic reduction processing;
7) above-mentioned superfine fiber synthetic leather base cloth can pass through flour milling, dyeing, prepare matte synthetic leather, or process through processing such as waterborne polyurethane resin veneer, embossing, printings, be prepared into the full aqueous polyurethane synthetic leather of the various uses such as clothing leather, sofa artificial leather, footwear leather.
The invention has the beneficial effects as follows: the polyurethane film in the synthetic leather base cloth that the method makes, wherein comprise the microcellular structure of a large amount of different sizes, there is better feel, the elasticity of compression, moisture-penetrable ventilated performance and sanitation performance, skin emulation effect is better than solvent-borne type, physical and mechanical properties and solvent-borne type superfine fibre approach, in synthetic leather prepared by base material, do not contain solvent take this synthetic leather base cloth, discharged the harm of solvent to human body; In whole production process, do not use any solvent, discharge without toxic and harmful; Eliminate a large amount of solvent waste in traditional handicraft, also reduced the input of solvent reclaimer, reduced cost and energy waste.
The another technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of aqueous polyurethane superfine fiber synthetic leather, is made by the preparation method of above-mentioned aqueous polyurethane superfine fiber synthetic leather.
The specific embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
PA/COPET Xing Ding island nonwoven fabric, its unit grammes per square metre is 240g/m
2, its apparent density is 0.30g/m
3; 120 parts, aqueous polyurethane slurry, described aqueous polyurethane slurry is DG-3020, its dry epithelium 120% stretching strength is 20KG/cm
2, solid content 20% percentage by weight, its viscosity is 6Pa.s, and 50 parts, 3 parts of neopelexes, 2 parts of Stearyl Amines and water stir with homogenizer, and making mixed slurry density is 300g/L; In dipping tank, with this mixed slurry immersion non-woven fabrics, pickup is 400～550g/m
2, keep 40～85% abscess; In coagulating basin, be 5 through pH value again, temperature is that the water-based solidification liquid of 20 ℃ solidifies, and washing in rinsing bowl, infrared drying oven are dried, and make base cloth; Again by the base cloth after drying in continuous or batch (-type) alkali deweighing machine through caustic reduction processing, the concentration of the NaOH of its use is 2%, decrement temperature is 80 ℃, 60 minutes after washings of decrement are to till pH value to 7, in 120 ℃～130 ℃ oven dry; Use again the silicone softening agent DH-105 (Yantai Daocheng Chemicals Co., Ltd.) of weight percentage 4%, the aqueous solution carries out post processing, the base cloth flooding after caustic reduction processing under 20 ℃ of conditions evenly soaks into, squeeze again, in 120 ℃～130 ℃ oven dry, obtain synthetic leather base cloth prepared by aqueous polyurethane.
This synthetic leather base cloth is soft, and tearing strength is higher; The elasticity of compression is good: rate of perviousness is high.By this synthetic leather base cloth (design parameter is in table 1) according to a conventional method, through flour milling, dyeing, napping, as soft matte synthetic leather, can be used as clothing leather and glove leather again.
Embodiment 2
PA/COPET Xing Ding island nonwoven fabric, its unit grammes per square metre is 300g/m
2, its apparent density is 0.33g/m
3; 120 parts, aqueous polyurethane slurry, described aqueous polyurethane slurry is DG-3050, its dry epithelium 120% stretching strength is 50KG/cm
2, solid content is 25% percentage by weight, its viscosity is 10Pa.s, and 120 parts, 5 parts of sulfosuccinate amine foaming agents, 3 parts of foam stabilizer Stearyl Amines and water, homogenizer stirs, and making mixed slurry density is 500g/L; In dipping tank, with this mixed slurry immersion non-woven fabrics, pickup is 600～660g/m
2, keep 40～85% abscess; In coagulating basin, be 4 through pH value again, temperature is that 25 ℃ of water-based solidification liquids solidify, and washing in rinsing bowl, infrared drying oven are dried, and make base cloth; Again by the process caustic reduction processing in continuous or batch (-type) alkali deweighing machine of the base cloth after drying, the concentration of the NaOH of its use is 3%, decrement temperature is at 90 ℃, 50 minutes after washings of decrement are to till pH value to 7, again in 120 ℃～130 ℃ oven dry, ester group softener DH-103 (Yantai Daocheng Chemicals Co., Ltd.) aqueous solution that is 2% with weight percentage again carries out post processing, the base cloth flooding after caustic reduction processing under 20 ℃ of conditions evenly soaks into, squeeze again, in 120 ℃～130 ℃ oven dry, obtain synthetic leather base cloth prepared by aqueous polyurethane.
Soft in this synthetic leather base cloth feel, skin emulation effect is good, and the tearing strength of base material is high; The elasticity of compression is good: rate of perviousness is high.By this synthetic leather base cloth (design parameter is in table 1) according to a conventional method, process through aqueous polyurethane surface layer resin and the processing of adhesive layer resin release liners dry method veneer again, prepare sofa artificial leather purposes veneer synthetic leather.
Aqueous polyurethane superfine fiber synthetic leather after-processing technology and Specifeca tion speeification that table 1 embodiment 1-2 makes
Comparative example 1
Except not adding foaming agent and foam stabilizer is not prepared foaming composite mortar, all the other raw materials are identical with technique with the raw material of embodiment 2; Obtain the aqueous polyurethane synthetic leather being formed by the polyurethane of superfine fibre and non-porous structure;
Hard in this synthetic leather feel, elasticity is strong, and the elasticity of compression is poor; The tensile strength of base material is higher, in tearing strength; Rate of perviousness is lower slightly.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a preparation method for aqueous polyurethane superfine fiber synthetic leather, is characterized in that, comprises the following steps:
1) 0～3 part of 4～8 parts of the foaming agents of following parts by weight, 1～6 part of foam stabilizer and 80～190 parts, water, water stain is added in the water-based anion polyurethane dipping sizing agent of 120 parts of parts by weight, stir with homogenizer again, make the slurry that density is 250～550g/L;
2) in dipping tank, nonwoven fabric be impregnated in described slurry, surface strikes off, and pickup is 400～1200g/m
2, keep 40～85% abscess;
3), by the nonwoven fabric after dipping, in coagulating basin, through water-based solidification liquid solidified water based polyurethane, aqueous polyurethane solidifies and forms abscess simultaneously;
4), after waterborne polyurethane resin solidifies completely, in rinsing bowl, through washing, infrared drying oven is dried, and makes base cloth;
5) base cloth after oven dry, process caustic reduction processing in continuous or batch (-type) alkali deweighing machine;
6) again by the base cloth process aftertreatment technology after caustic reduction processing;
7) by base cloth process flour milling, dyeing through aftertreatment technology, prepare matte synthetic leather; Or through waterborne polyurethane resin veneer, embossing and printing, be prepared into clothing leather, sofa artificial leather or footwear leather.
2. an aqueous polyurethane superfine fiber synthetic leather, is characterized in that, is made by the preparation method of aqueous polyurethane superfine fiber synthetic leather claimed in claim 1.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104179030A (en) * | 2014-07-02 | 2014-12-03 | 合肥冠怡涂层织物有限公司 | High-quality microfiber-type waterborne synthetic leather and preparation method thereof |
| CN105178055A (en) * | 2015-10-15 | 2015-12-23 | 四川大学 | Water-saving superfine fiber synthetic leather base cloth impregnation method based on cationic water-based polyurethane |
| CN106003966A (en) * | 2016-05-04 | 2016-10-12 | 江苏宝光新型材料科技有限公司 | Plate production equipment and method |
| CN106192449A (en) * | 2016-08-17 | 2016-12-07 | 福建鑫发无纺布有限责任公司 | A kind of full aqueous, environmental protective superfine fiber leather manufacture method |
| CN106436330A (en) * | 2015-08-11 | 2017-02-22 | 张庆州 | Coating cloth processing method |
| CN106521986A (en) * | 2016-12-02 | 2017-03-22 | 淮安凯悦科技开发有限公司 | Aqueous double-faced suede microfiber PU synthetic leather and production method thereof |
| CN106868880A (en) * | 2017-04-10 | 2017-06-20 | 合肥科天水性科技有限责任公司 | A kind of aqueous polyurethane imitates woven fabric and its manufacture method |
| WO2018045546A1 (en) * | 2016-09-09 | 2018-03-15 | Dow Global Technologies Llc | Chemical resistant pud for microfiber nonwoven synthetic leather application and the method |
| CN107938376A (en) * | 2017-12-26 | 2018-04-20 | 泉州静杰企业管理咨询有限公司 | A kind of production method for frivolous synthetic leather of breathing freely |
| WO2018099150A1 (en) * | 2016-12-02 | 2018-06-07 | 李桂军 | Aqueous double-sided-suede microfiber pu synthetic leather and preparation method therefor |
| CN108729243A (en) * | 2018-06-28 | 2018-11-02 | 淮安凯悦科技开发有限公司 | A kind of full aqueous ultrafine fibre vehicle seat and high-grade sofa synthetic leather and preparation method thereof |
| CN110565395A (en) * | 2019-07-25 | 2019-12-13 | 温州珍瑾服装有限公司 | production process of PU synthetic leather |
| CN110983802A (en) * | 2019-12-24 | 2020-04-10 | 兰州科天水性高分子材料有限公司 | Ultra-soft aqueous wet leather base and preparation method thereof |
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- 2012-10-15 CN CN201210393400.4A patent/CN103774455A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179030A (en) * | 2014-07-02 | 2014-12-03 | 合肥冠怡涂层织物有限公司 | High-quality microfiber-type waterborne synthetic leather and preparation method thereof |
| CN106436330A (en) * | 2015-08-11 | 2017-02-22 | 张庆州 | Coating cloth processing method |
| CN105178055B (en) * | 2015-10-15 | 2017-05-10 | 四川大学 | Water-saving superfine fiber synthetic leather base cloth impregnation method based on cationic water-based polyurethane |
| CN105178055A (en) * | 2015-10-15 | 2015-12-23 | 四川大学 | Water-saving superfine fiber synthetic leather base cloth impregnation method based on cationic water-based polyurethane |
| CN106003966A (en) * | 2016-05-04 | 2016-10-12 | 江苏宝光新型材料科技有限公司 | Plate production equipment and method |
| CN106003966B (en) * | 2016-05-04 | 2019-01-25 | 江苏宝光新型材料科技有限公司 | Board production equipment and method |
| CN106192449A (en) * | 2016-08-17 | 2016-12-07 | 福建鑫发无纺布有限责任公司 | A kind of full aqueous, environmental protective superfine fiber leather manufacture method |
| WO2018045546A1 (en) * | 2016-09-09 | 2018-03-15 | Dow Global Technologies Llc | Chemical resistant pud for microfiber nonwoven synthetic leather application and the method |
| RU2741548C2 (en) * | 2016-09-09 | 2021-01-26 | Дау Глоубл Текнолоджиз Ллк | Chemically stable polyurethane dispersions used to produce synthetic skin from microfiber on a nonwoven basis and a method for production thereof |
| CN109689718A (en) * | 2016-09-09 | 2019-04-26 | 陶氏环球技术有限责任公司 | Chemically-resistant PUD and method for the non-woven synthetic leather application of microfibre |
| CN106521986B (en) * | 2016-12-02 | 2018-03-02 | 淮安凯悦科技开发有限公司 | A kind of water-based two-sided matte woven fabric PU synthetic leather and preparation method thereof |
| CN106521986A (en) * | 2016-12-02 | 2017-03-22 | 淮安凯悦科技开发有限公司 | Aqueous double-faced suede microfiber PU synthetic leather and production method thereof |
| WO2018099150A1 (en) * | 2016-12-02 | 2018-06-07 | 李桂军 | Aqueous double-sided-suede microfiber pu synthetic leather and preparation method therefor |
| CN106868880A (en) * | 2017-04-10 | 2017-06-20 | 合肥科天水性科技有限责任公司 | A kind of aqueous polyurethane imitates woven fabric and its manufacture method |
| CN106868880B (en) * | 2017-04-10 | 2020-09-29 | 合肥科天水性科技有限责任公司 | Water-based polyurethane imitated microfiber and manufacturing method thereof |
| CN107938376A (en) * | 2017-12-26 | 2018-04-20 | 泉州静杰企业管理咨询有限公司 | A kind of production method for frivolous synthetic leather of breathing freely |
| CN108729243A (en) * | 2018-06-28 | 2018-11-02 | 淮安凯悦科技开发有限公司 | A kind of full aqueous ultrafine fibre vehicle seat and high-grade sofa synthetic leather and preparation method thereof |
| CN110565395A (en) * | 2019-07-25 | 2019-12-13 | 温州珍瑾服装有限公司 | production process of PU synthetic leather |
| CN110983802A (en) * | 2019-12-24 | 2020-04-10 | 兰州科天水性高分子材料有限公司 | Ultra-soft aqueous wet leather base and preparation method thereof |
| CN110983802B (en) * | 2019-12-24 | 2022-08-19 | 兰州科天水性高分子材料有限公司 | Super-soft aqueous wet leather base and preparation method thereof |
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Application publication date: 20140507 |