CN100552128C - Production method of polyurethane four-side elastic synthetic leather and products thereof - Google Patents
Production method of polyurethane four-side elastic synthetic leather and products thereof Download PDFInfo
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- CN100552128C CN100552128C CNB2007100239510A CN200710023951A CN100552128C CN 100552128 C CN100552128 C CN 100552128C CN B2007100239510 A CNB2007100239510 A CN B2007100239510A CN 200710023951 A CN200710023951 A CN 200710023951A CN 100552128 C CN100552128 C CN 100552128C
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Abstract
Disclosed in this invention is a kind of production method and products thereof of polyurethane four-side elastic synthetic leather, and its production method is the artificial leather base-material with polyurethane, and is base cloth with elastic polyurethane fiber cloth; With the guiding of described base cloth debatching open width successively by dimethyl formamide water-bath dipping, the described dipping base cloth one surface coated composite material that is major ingredient with polyurethane, by the dimethyl formamide water-bath make polyurethane solidify finished leather and be bonded to one with described base cloth, washing and dryness finalization production craft step, thereby make the finished product polyurethane four-side elastic synthetic leather; When described base cloth is guided through described coating polyurethane and is solidified two production craft step of bonding, described base cloth is that motion is its principal character under constant linear velocity " zero " tension force condition, characteristics such as it is simple and easy to have the technological process of production, and Environmental Safety and production cost are low.Characteristics such as its manufactured goods are its principal character to be integral by elastic polyurethane fiber cloth and layer of polyurethane compoiste adhering, and it is big to have four sides percentage elongation and an elongation recovery percentage, and Practical Performance is good.
Description
Technical field
The present invention relates to production method of a kind of polyurethane four-side elastic synthetic leather and products thereof, belong to the synthetic leather production technology.
Background technology
Polyurethane four-side elastic synthetic leather involved in the present invention is the polyurethane artificial synthetic leather that strain can both be made in a kind of left and right, upper and lower four sides.
At present, the production method of known artificial synthetic leather mainly contains two kinds of production methods of dry type synthetic method and wet type synthetic method.And dry type synthetic method and wet type synthetic method all are compound synthetic tannings of two steps, and promptly the first step is produced earlier leather substrate and musculus cutaneus (or claiming epithelium) respectively, and second step fitted the leather substrate produced and musculus cutaneus mutually and bonds and be integral.
Take a broad view of the production method of prior art, not only can be owing to its solvent for use cause serious environmental pollution, threaten health of human body, and because its factory building, equipment investment are big, manpower and energy consumption are big, low so that its manufactured goods production cost height of the graded rate of products.Because the existing many deficiencies of prior art, the production method of above-mentioned two kinds of artificial synthetic leathers is progressively substituted by new technologies.
The prior art two-step method is produced the new technologies that the artificial synthetic leather process makes improvements, " the one-time formed synthetic leather manufacture method of base material and musculus cutaneus " such as Chinese patent Granted publication CN1260427C, a kind of base material of making a PU foamed plastic plastic layer is at one time respectively disclosed, with a musculus cutaneus, and both are not all finished in half-reaction under the state of sclerosis fitted the synthetic leather manufacture method that it is bonded with each other.Although this new method, the base material and the musculus cutaneus that have overcome known technology must be made respectively, and the shortcoming of waste storage and deposit material space has the shortening production procedure, saves factory building, equipment and manpower, electric power and material resources, the advantage that reduces production costs.But the base material of its PU foamed plastic layer is still constituted by non-elastic force cloth or nonwoven fabric or superfine fibre, thereby its manufactured goods still do not possess the synthetic leather of big percentage elongation, promptly non-four-side elastic synthetic leather of the present invention for the four sides; And its production process still do not surmount the scope of the compound synthetic tanning of two steps of known technology, only is to produce leather substrate and musculus cutaneus on same equipment respectively, and the applying of finishing described base material and musculus cutaneus immediately engages.Undoubtedly, this patented technology still exists the device structure complexity, and the technological process troublesome poeration consumes the more and more high deficiencies of production cost of production auxiliary materials such as release liners.
The result shows according to the retrieval, production method of polyurethane four-side elastic synthetic leather of the present invention and products thereof, and not seeing so far has report.
Summary of the invention
The present invention aims to provide a kind of technological process of production advantages of simple, favorable quality of finished products, and production method of the polyurethane four-side elastic synthetic leather of Environmental Safety and products thereof is to satisfy society's demand growing to the high-tension synthetic leather.
The present invention realizes the general technical conception of its purpose:
With elastic polyurethane fiber cloth is base cloth.Have bigger percentage elongation and elongation recovery percentage on four sides to give manufactured goods Synthetic Leather of the present invention;
With dimethyl formamide (DMF) is solvent.Dimethyl formamide is the good organic solvent of a kind of boiling point height (152.8 ℃), freezing point low (61 ℃), self-ignition point height (445 ℃), chemistry and Heat stability is good, especially is suitable for the solvent of making big molecular attraction polymer; Its aqueous solution is specially adapted to for example elastic polyurethane fiber cloth of polyester coated various extensibility material; Can mix arbitrarily with water, and not volatile at normal temperatures, and itself and water separation technology also do not bother, can accomplish non-pollution discharge comparatively easily.Especially the dimethyl formamide that is present in layer of polyurethane inside very easily with the water displacement, and makes described synthetic leather have air permeability and good.In view of dimethyl formamide has above-described physical and chemical performance, therefore, the preferred dimethyl formamide of the present invention is as solvent.
Adopt overall process wet production technology.Make the process of solidifying finished leather and being bonded to one of the polyester layer of preceding water-bath impregnation process of described base cloth coated polyester and described wet basis cloth one surface coated, all in the water-bath that contains described solvent, carry out with base cloth; Continuing, you take the public running water water-bath in city cleaning way, and effective elimination solvent that manufactured goods of the present invention are with makes the described solvent of manufactured goods of the present invention contain the band amount and is reduced to below the standard License Value.
Described base cloth open width is solidified the overall process of bonding by coating polyurethane and layer of polyurethane, described base cloth is moved, to guarantee that manufactured goods of the present invention have the uniformity of good surface flatness, polyester coatings thickness and bigger fine qualities such as percentage elongation under constant linear velocity " zero " tension force condition.
Suggestion can will contain the aqueous solution of dimethyl formamide, and the DMF retracting device by efficient separation equipment is for example produced by Taiwan carries out purified treatment, accomplishing the circulating and recovering of water and dimethyl formamide, energy savings, reduces production costs and CR production.
Based on above-mentioned general technical conception, the present invention realizes that the technical scheme of its purpose is:
A kind of production method of polyurethane four-side elastic synthetic leather is the artificial leather base-material with polyurethane, and its innovation and creation point is:
A, be base cloth with elastic polyurethane fiber cloth;
B, with the guiding of described base cloth debatching open width successively the water-bath dipping by containing dimethyl formamide, described base cloth one surface coated through dipping with polyurethane be major ingredient composite material, by the water-bath that contains dimethyl formamide make layer of polyurethane solidify finished leather and be bonded to one with described base cloth, in the clear water water-bath washing and dryness finalization production craft step, thereby make the finished product polyurethane four-side elastic synthetic leather;
C, in the guiding of described base cloth through described coating polyurethane with when solidifying the whole process of two production craft step of bonding, described base cloth moves under constant linear velocity " zero " tension force condition.
Here should be noted that the permanent dimension zero tension force moving condition of described base cloth, is to be the infinitely variable speeds adjuster by the included P type speed regulator of special plane equipment, regulates that the rotating speed of the drive roll of the described base cloth motion of guiding and driven roll provides.
Can understand that by above given technical scheme the present invention has not only realized its purpose, and compared with the prior art, have outstanding substantive distinguishing features and obvious improvement.
The present invention is its each production craft step preferably, carries out continuously successively on a special plane production line.Because can shorten flow process like this, enhance productivity, save factory building, equipment and manpower, electric power and material resources, reduce production costs.Certainly be not limited to this.For example, clear water washing and dryness finalization production craft step can be finished by another special plane.
The present invention is preferably after described base cloth guiding is by dimethyl formamide water-bath impregnation steps or before coating is the composite material step of major ingredient with polyurethane, also comprise the dehydration production craft step, and described base cloth by the moisture content of dehydration after the production craft step in 45～60% scopes.Dehydration described here advocates to use roll squezzing.Certainly do not get rid of dehydration otherwise yet, for example pat base cloth dehydration or base cloth shake dehydration or the like.And directly being coated with polyurethane, described immersion base cloth also is fine, but the adhesive property of its base cloth and polyurethane, perhaps can be more a little bit poorer.
The present invention is preferably in after the described dryness finalization step, also comprises manufactured goods polyurethane four-side elastic synthetic leather rolling production craft step.Like this, the manufactured goods of the present invention after rolling are coiled materials, and it will conveniently be stored in a warehouse and transport.And, also can adopt the Zhe cloth apparatus that is similar to printing and dyeing producer in large-scale leather integrated production plant man, and manufactured goods of the present invention are folded in the ingot-shaped transport vehicle, directly supply with the cloth tool finished product processing of road, back.
The present invention preferably is used for flooding the component of the dimethyl formamide aqueous solution of described base cloth and the weight proportion of each component is water: dimethyl formamide: auxiliary agent=100: 30～50: 0.5; Wherein said auxiliary agent mainly comprises and takes off DMF agent, bleeding agent and softener.And the described DMF of taking off agent is advocated with taking off DMF agent-7 or taking off DMF agent-8.
It is that the component of composite material of major ingredient and the weight proportion of each component are polyurethane: dimethyl formamide: lignocellulose: auxiliary agent=100: 130～150: 20～25: 0.5 with polyurethane in described base cloth one surface coated that the present invention preferably is used for; Wherein said auxiliary agent mainly comprises abscess conditioning agent and levelling agent.Described wood fibre, opinion adopts the dendritic or strip wood fibre of 600 order powderies, penetrates the DMF film with it, thereby draws moisture content.Described polyurethane is that the viscosity of composite material of major ingredient is in 3000～6000 currys are moored (CPS) scope.And advocate that described composite material extrudes from wide being coated with in the draught animals of gap 1～2.5mm.Described immersion base cloth then can form the thick polyurethane coating of 0.6～1.2mm if pass through with the linear velocity of 2～5m/min.
The concentration of the preferred described dimethyl formamide that solidifies the used dimethyl formamide aqueous solution of bonding production craft step of the present invention is in 5～25% scopes.
What the preferred described drying and shaping production craft step of the present invention was adopted is steam heat-exchanging air drying setting process, and its temperature is in 130～150 ℃ of scopes.And the special drying and shaping temperature of advocating is 140 ℃.Certainly do not get rid of and adopt other dryness finalization technology, for example electrical drying setting process etc.
After the technical scheme of aforementioned production method is implemented, production method of the present invention, the technological process that is had is simple and easy, normal temperature and pressure production, safe and reliable, site environment is good, energy-saving and water-saving, production cost is low, and characteristics such as favorable quality of finished products are self-evident.
The technical scheme of the product polyurethane four-side elastic synthetic leather structure that production method of the present invention is as described above made is: by elastic polyurethane fiber cloth and layer of polyurethane compoiste adhering and be integral.
And the grammes per square metre of the preferred described elastic polyurethane fiber cloth of manufactured goods of the present invention is at 150～450g/m
2In the scope; The thickness of described layer of polyurethane is in 0.6～1.2mm scope; Its four sides percentage elongation and elongation recovery percentage are all in 70～120% scopes.
The percentage elongation that the invention described above manufactured goods are had is obviously greater than prior art, good permeability, polyurethane coating thickness is fit to practical requirement, made dress ornament, leatherware and the decoration Protection Product because elastic force is high, not only give the feeling comfortable of people and tool is durable in use etc. that characteristics are conspicuous, it is compared with the made synthetic leather of prior art, has outstanding substantive distinguishing features and marked improvement.
Description of drawings
Fig. 1 is the process chart of a kind of concrete production method of the present invention;
Fig. 2 is the process chart of the another kind of concrete production method of the present invention;
Fig. 3 is the profile (amplification) of manufactured goods of the present invention.
The specific embodiment
Below contrast accompanying drawing, by the description of the specific embodiment, the invention will be further described.
One of specific embodiment, as shown in Figure 2.
A kind of production method of polyurethane four-side elastic synthetic leather is the artificial leather base-material with polyurethane, is base cloth with terylene or polyamide fibre and the elastic polyurethane fiber cloth of spandex through compiling; The processing step of its production method is successively, be the composite material of major ingredient with polyurethane with the water-bath dipping of described base cloth debatching open width guiding by containing dimethyl formamide, in described base cloth one surface coated through dipping, make layer of polyurethane solidify finished leather by the water-bath that contains dimethyl formamide and be bonded to one with described base cloth, in the public running water water-bath in city washing and dryness finalization, thereby make the finished product polyurethane four-side elastic synthetic leather; After this, also comprise the rolling production craft step.And when described base cloth was guided through described coating polyurethane and solidified the whole process of two production craft step of bonding, described base cloth moved under constant linear velocity " zero " tension force condition.And its each production craft step is carried out on a special plane production line successively continuously.And in the guiding of described base cloth by after the dimethyl formamide aqueous solution impregnation steps, also comprise the squezzing production craft step, and the moisture content of described base cloth after by the squezzing production craft step is 50%.After described dryness finalization step, also comprise manufactured goods polyurethane four-side elastic synthetic leather rolling production craft step.And being used for flooding the component of the dimethyl formamide aqueous solution of described base cloth and the weight proportion of each component is water: dimethyl formamide: auxiliary agent=100: 40: 0.5, wherein said auxiliary agent mainly comprise and take off DMF-7 agent, bleeding agent and softener.Be used for is that the component of composite material of major ingredient and the weight proportion of each component are polyurethane: dimethyl formamide: lignocellulose: auxiliary agent=100: 140: 20 with polyurethane in described base cloth one surface coated: 0.5, and its viscosity is 4000CPS; The movement velocity of described base cloth is 3.5m/min; Wherein said auxiliary agent mainly comprises abscess conditioning agent and levelling agent.Described concentration of solidifying the dimethyl formamide of the used dimethyl formamide aqueous solution of bonding production craft step is 15%.What described drying and shaping production craft step was adopted is steam heat-exchanging air drying setting process, and its temperature is 140 ℃.Above-mentioned each production craft step is all carried out at normal temperatures and pressures.Described base cloth open width under the guiding of carry-over pinch rolls travels forward continuously; And described first step base cloth is 3 minutes by the time of water-bath dipping; Described second step coating polyurethane adopts mouthful coating that is coated with in 1mm gap, and described base cloth passes through with the linear velocity of 4m/min; It is 8min that described third step layer of polyurethane solidifies the time of bonding by described water-bath; And the time that the 4th step is washed by water-bath is 5min.
Two of the specific embodiment, as shown in Figure 3.
The product polyurethane four-side elastic synthetic leather that a kind of production method is as described herein produced is integral with layer of polyurethane 2 compoiste adherings by elastic polyurethane fiber cloth 1.The grammes per square metre of described elastic polyurethane fiber cloth 1 is 200g/m
2The thickness of described layer of polyurethane 2 is 0.8mm; Its four sides percentage elongation and elongation recovery percentage are all in 70～120% scopes.
The testing result of the product polyurethane four-side elastic synthetic leather first sample of making as production method of the present invention shows that its every technical indicator all reaches European SGS standard.Especially the residual quantity of its dimethyl formamide (DMF) is lower than the SGS standard.And after adopting described purification apparatus that the aqueous solution that contains dimethyl formamide is handled reuse, no waste water, toxic emission have been accomplished.Because its each production craft step carries out under normal pressure, normal temperature condition, thus its production on-site environment especially air also all be safety clean.
Claims (9)
1, a kind of production method of polyurethane four-side elastic synthetic leather is the artificial leather base-material with polyurethane, it is characterized in that:
A, be base cloth with elastic polyurethane fiber cloth;
B, with the guiding of described base cloth debatching open width is water by containing weight proportion successively: dimethyl formamide: the water-bath dipping of auxiliary agent=100: 30～50: 0.5, at the described base cloth one surface coated weight proportion through dipping is polyurethane: dimethyl formamide: lignocellulose: auxiliary agent=100: 130～150: 20～25: 0.5 composite materials, make layer of polyurethane solidify finished leather and be bonded to one by the water-bath of dimethyl formamide concentration in 5～25% scopes with described base cloth, washing and steam heat-exchanging air drying typing production craft step in the clear water water-bath, thus the finished product polyurethane four-side elastic synthetic leather made;
C, in the guiding of described base cloth through described coating polyurethane with when solidifying the whole process of two production craft step of bonding, described base cloth is a rotating speed of regulating drive roll and driven roll by P type stepless speed adjusting gear, moves under constant linear velocity " zero " tension force condition.
2, the production method of polyurethane four-side elastic synthetic leather according to claim 1 is characterized in that: its each production craft step, on a special plane production line, carry out continuously successively.
3, the production method of polyurethane four-side elastic synthetic leather according to claim 1, it is characterized in that: after described base cloth guiding is by dimethyl formamide water-bath impregnation steps or before coating is the composite material step of major ingredient with polyurethane, also comprise the dehydration production craft step, and described base cloth by the moisture content of dehydration after the production craft step in 45～60% scopes.
4, the production method of polyurethane four-side elastic synthetic leather according to claim 1 is characterized in that: after described dryness finalization production craft step, also comprise manufactured goods polyurethane four-side elastic synthetic leather rolling production craft step.
5, the production method of polyurethane four-side elastic synthetic leather according to claim 1 is characterized in that: being used for flooding the described auxiliary agent in the water-bath of described base cloth, is to take off DMF agent, bleeding agent and softener.
6, the production method of polyurethane four-side elastic synthetic leather according to claim 1 is characterized in that: being used for described auxiliary agent in the composite material of described base cloth one surface coated, is abscess conditioning agent and levelling agent.
7, the production method of polyurethane four-side elastic synthetic leather according to claim 1 is characterized in that: the temperature of described dryness finalization is in 130～150 ℃ of scopes.
8, the product polyurethane four-side elastic synthetic leather made of production method according to claim 1 is characterized in that: be integral with layer of polyurethane (2) compoiste adhering by elastic polyurethane fiber cloth (1).
9, polyurethane four-side elastic synthetic leather according to claim 8 is characterized in that: the grammes per square metre of described elastic polyurethane fiber cloth (1) is at 150～450g/m
2In the scope; The thickness of described layer of polyurethane (2) is in 0.6～1.2mm scope; Its four sides percentage elongation and elongation recovery percentage are all in 70～120% scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100239510A CN100552128C (en) | 2007-06-28 | 2007-06-28 | Production method of polyurethane four-side elastic synthetic leather and products thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100239510A CN100552128C (en) | 2007-06-28 | 2007-06-28 | Production method of polyurethane four-side elastic synthetic leather and products thereof |
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| CN101082180A CN101082180A (en) | 2007-12-05 |
| CN100552128C true CN100552128C (en) | 2009-10-21 |
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| CNB2007100239510A Expired - Fee Related CN100552128C (en) | 2007-06-28 | 2007-06-28 | Production method of polyurethane four-side elastic synthetic leather and products thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760969B (en) * | 2009-05-16 | 2012-01-11 | 石狮龙祥制革有限公司 | Method for producing nubuck |
| CN102535186B (en) * | 2011-12-26 | 2013-11-06 | 安徽安利合成革股份有限公司 | Method for preparing high-strength and high-density embossed synthetic leather |
| CN104305763A (en) * | 2014-11-07 | 2015-01-28 | 成都三鑫鼎高家具有限公司 | Method for manufacturing high-class leather cloak environment-friendly sofa |
| CN106087446A (en) * | 2016-08-08 | 2016-11-09 | 嘉兴金州聚合材料有限公司 | A kind of slim aqueous four-side elastic synthetic leather |
| CN106436336A (en) * | 2016-09-28 | 2017-02-22 | 福建正瑞泰革业有限公司 | Production method of polyurethane four-sided elastic clothing trousers |
| CN107513867A (en) * | 2017-08-19 | 2017-12-26 | 安徽安利材料科技股份有限公司 | Durable durable type sofa furniture Synthetic Leather of a kind of low VOC height of wet method and preparation method thereof |
| CN108867085B (en) * | 2018-08-20 | 2021-02-02 | 福建华夏合成革有限公司 | Four-side elastic hydrolysis-resistant super-soft protein synthetic leather |
| CN110644246B (en) * | 2019-09-16 | 2022-04-05 | 安徽安利材料科技股份有限公司 | Polyurethane synthetic leather for moisture-absorbing and breathable shoe lining and preparation method thereof |
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2007
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Owner name: CHANGZHOU DONGLONG SYNTHETIC LEATHER FACTORY Free format text: FORMER OWNER: CHANGZHOU DONGLONG SYNTHETIC FACTORY Effective date: 20130513 |
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Effective date of registration: 20130513 Address after: 213021, 166, Tsing Yang North Road, Qinglong Street, Tianning District, Jiangsu, Changzhou Patentee after: Changzhou Donglong synthetic leather Co. Ltd. Address before: 213021, Jiangsu, Changzhou province Tianning District Qinglong Township Fu Cheng Village Patentee before: Changzhou Donglong Synthetic Factory |
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