CN102877322B - Method for preparing suede waterborne polyurethane superfine fiber synthetic leather - Google Patents
Method for preparing suede waterborne polyurethane superfine fiber synthetic leather Download PDFInfo
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Abstract
The invention provides a method for preparing suede waterborne polyurethane superfine fiber synthetic leather. The method comprises the following steps of: obtaining superfine fiber waterborne polyurethane synthetic leather bass by taking a polyamide 6/polyethylene (PA6/PE) bicomponent fiber non-woven fabric as a base material by a cationic waterborne polyurethane impregnation/demulsification agglomeration composite method and a methylbenzene decrement fiber separation method; and finally, obtaining the suede waterborne polyurethane superfine fiber synthetic leather by strong acid dye and weak acid dye matched dyeing and buffing after-treatment technologies. The problem of dimethyl formamide (DMF) pollution which is caused by a current solvent type production system, the problem of product safety which is caused by the residue of DMF in products, and the problems that heavy metals can exceed the standard easily and the heat migration resistance of dyes is low are solved.
Description
Technical field
The present invention relates to superfine fiber chemical leather technical field, be specifically related to a kind of preparation method of matte aqueous polyurethane superfine fiber synthetic leather
Background technology
Natural leather resource-constrained, production process can produce larger pollution.So, have premium properties simulated composite leather be developed to the pursuit for the mankind.Wherein taking the not weaving fabric of superfine fiber with tridimensional network as reinforcing material, the superfine fiber chemical leather obtaining by dipping polyurethane, no matter from internal microstructure, or the aspect such as appearance tactile impression and physical characteristic and people's snugness of fit has all approached natural leather.At present, the existing more than 90% high-grade sport footwear in the whole world adopts superfine fiber chemical leather manufacture, the most of superfine fiber chemical leather that adopts of leather for three major ball games of basketball class, and high-grade automotive seat also starts to adopt superfine fiber chemical leather to substitute natural leather, its range of application expanding day, development prospect is boundless.
The development of China's superfine fiber chemical leather industry only has the course of more than ten years, has obtained fast development in recent years, and China's Mainland has become the production base that global superfine fiber chemical leather is largest.Show according to State Statistics Bureau's information material, China's annual total import and export volume 36.36 of superfine fiber chemical leather in 2011 is with dollar, 10.7 hundred million meters of its middle outlets (56.96 ten thousand tons), increase by 12.96 on a year-on-year basis, export volume has accounted for 23.36% of total output, 30.4 hundred million dollars of export trade volumes, increase by 35.11% on a year-on-year basis, have started to form the new historical stage of third generation production development.
At present, in superfine fiber chemical leather technical field, for matte solvent borne polyurethane superfine fiber chemical leather, the subject matter of existence has two aspects:
(1) matte solvent borne polyurethane superfine fiber chemical leather adopts solvent borne polyurethane dipping complex technique, its basic technique is to allow bicomponent fibers non-weaving cloth dipping taking solvent borne polyurethane (PU) and dimethyl formamide (DMF) as the maceration extract of main component, then enters DMF and H
2o is in the solidification liquid of main component composition, due to solvent-borne type PU and H
2o incompatible and DMF and H
2the unconfined of O dissolves each other, and makes solvent-borne type PU/DMF system due to H
2the existence of O, DMF and H
2phase double replacement between O, makes DMF by H
2o extracts, and finally makes solvent-borne type PU form micropore filling body, is filled in bicomponent fibers non-weaving cloth, thereby obtains solvent borne polyurethane bicomponent fibers wet impregnation bass.This preparation method can produce two great problems, and the first has adopted DMF to make solvent, and process can cause the solvent contamination of DMF; It two is H
2o can not replace the DMF in polyurethane completely, can cause that the DMF of product is residual, finally causes product safety problem.
(2) matte solvent borne polyurethane superfine fiber chemical leather is can dyeability poor, and dyefastness is not high.This is mainly because matte solvent borne polyurethane superfine fiber chemical leather mainly comprises two kinds of compositions of polyurethane that not weaving fabric of superfine fiber and dipping are filled, and active group is little on solvent borne polyurethane, most of dyestuffs are difficult to dye, its washing fastness is very poor, is difficult to reach the requirement of matte polyurethane ultrafine fiber synthetic leather; And the current conventional colouring method that adopts neutral dye and DISPERSE DYES to coordinate, easily there is problem that neutral dyeing heavy metal easily exceeds standard and the problem of DISPERSE DYES heat migration poor performance.
According to the production technology of above-mentioned traditional matte solvent borne polyurethane superfine fiber chemical leather, production process exists serious DMF problem of environmental pollution, is a non-clean production process, and human body is had to larger harm.In the Synthetic Leather obtaining, easily there is the residual product safety problem that causes of DMF.So, exploitation process for cleanly preparing, the product of the friendly type of production environment is an inevitable trend.
At present, in research and development for matte polyurethane ultrafine fiber synthetic leather clearer production technology and environmentally friendly matte polyurethane ultrafine fiber synthetic leather production technology, most study be matte aqueous polyurethane superfine fiber synthetic leather technology, its core technology is exactly aqueous polyurethane dipping complex technique and staining technique.
Summary of the invention
Of the present invention provide a kind of and can solve DMF pollution problem that current matte solvent-borne type superfine fiber polyurethane leather produces in producing, produced in the residual product safety problem causing, problem that neutral dyeing heavy metal easily exceeds standard and the problem of DISPERSE DYES heat migration poor performance of product DMF, have that Color is good, the preparation method of the matte aqueous polyurethane superfine fiber synthetic leather of the friendly type of production environment.
In order to achieve the above object, the technical solution used in the present invention is:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 20～65 parts of solid contents by weight and 35～80 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
Under agitation make inorganic salts and inorganic base dissolve the inorganic salts of 10～20 parts, the inorganic base of 5～10 parts and the water mixing of 60～85 parts by weight, obtain solidification liquid;
1.3) dipping recombination process
First, by being equipped with in the dipping tank of maceration extract, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 30%～80% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin of solidification liquid is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 300%～1000% water, 2%～6% highly acid dyestuff, 1%～3% weak acid dye, then at the temperature of 90～95 DEG C, dye 60～120 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), then use the napping of brush roll napping machine, finally obtain matte aqueous polyurethane superfine fiber synthetic leather.
Described inorganic salts are the mixture of one or more arbitrary proportions in sodium sulphate, sodium chloride, ammonium sulfate or ammonium chloride.
Described inorganic base is the mixture of one or more arbitrary proportions in sodium carbonate, sodium bicarbonate or NaOH.
In described step 4), select 150 order abrasive band buffing 1 time when buffing, adopting the number of times of brush roll napping machine napping is 1 time.
The temperature of described maceration extract is 30～50 DEG C.
The temperature of described solidification liquid is 30～70 DEG C.
The present invention compares with current matte solvent borne polyurethane superfine fiber chemical leather wet impregnation bass preparation method, has following beneficial effect:
1, Color is good
The present invention utilizes the maceration extract dipping PA6/PE bicomponent fibers non-weaving cloth that cation-type water-thinned polyurethane is main component, then by solidification liquid, the cation-type water-thinned polyurethane breakdown of emulsion in PA6/PE bicomponent fibers non-weaving cloth is solidified, form the obturator of porous, be filled in fiber non-woven, obtain A6/PE bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass.
After in the PA6/PE bicomponent fibers with maceration extract, non-weaving cloth immerses solidification liquid, on the one hand, the alkali (HO that these inorganic bases produce
-) by the cationic hydrophilic groups sealing in cation-type water-thinned polyurethane, make the stability of cation-type water-thinned polyurethane in the aqueous solution have decline; On the other hand, inorganic salts can produce dehydration to cation-type water-thinned polyurethane, thereby make cation-type water-thinned polyurethane lose dissolving or the dispersibility in water, generation breakdown of emulsion solidifies, formation has the filling polyurethane body of microcellular structure, be filled in PA6/PE bicomponent fibers in non-weaving cloth, form complex, i.e. so-called PA6/PE bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass.
Due on the strand of cation-type water-thinned polyurethane with cation group, these cation groups all have good associativity with highly acid dyestuff and weak acid dye in step 3) bass dyeing course; Meanwhile, form through the PA6/PE bicomponent fibers non-weaving cloth flooding and breakdown of emulsion solidifies.
A6/PE bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass is through step 2) toluene decrement extracts out and is transformed into PA6 superfine fibre aqueous polyurethane synthetic leather wet impregnation bass.Polyethylene in the process of getting rid of in toluene decrement in PA6/PE bicomponent fibers is extracted by toluene, forms the PA6 superfine fibre of pencil, and the PA6 superfine fibre of this pencil has good associativity to weak acid dye and neutral dye.
So the superfine fibre aqueous polyurethane synthetic leather wet impregnation bass being made up of cation-type water-thinned polyurethane obturator and PA6 superfine fibre has good stainability, adopt highly acid dyestuff and weak acid dye just can reach good Color.
2, production environment close friend
1) eliminated the pollution problem of the DMF in production process and final products because DMF pollutes caused product safety problem
Compared with the preparation method of conventional matte solvent borne polyurethane superfine fiber chemical leather, replace solvent borne polyurethane with cation-type water-thinned polyurethane, replaced the solidification liquid of DMF and water composition with the solidification liquid of inorganic salts, inorganic base and water composition, in production process, can not use any solvent, can solve the DMF pollution problem producing in current matte solvent borne polyurethane superfine fiber chemical leather production completely; Owing to having eliminated in process of production the solvent contamination of DMF, safer production environment can be provided, be of value to the healthy of direct labor; Meanwhile, in production process, do not need DMF taking back and process yet, can reduce to a great extent energy consumption, thereby reduce production costs.And, owing to not using DMF in production process, so, produce in product and do not contain DMF, solve the product safety problem causing because DMF is residual in product.
2) problem that solution neutral dyeing heavy metal easily exceeds standard and the problem of DISPERSE DYES heat migration poor performance
PA6 superfine fibre aqueous polyurethane synthetic leather wet impregnation bass is in the bass dyeing course carrying out in step 3), owing to having adopted highly acid dyestuff and weak acid dye to coordinate the method for dyeing, its middle strong acidity dyestuff can reach the coloration of infiltration, and weak acid dye can reach the effect of padding.Compare with the current conventional method that adopts neutral dye and disperse dyeing, adopt highly acid dyestuff and weak acid dye to coordinate the method for dyeing can solve problem that neutral dyeing heavy metal easily exceeds standard and the problem of DISPERSE DYES heat migration poor performance completely.
Detailed description of the invention
Embodiment 1:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 20 parts of solid contents by weight and 35 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
Under agitation make inorganic salts and inorganic base dissolve the inorganic salts sodium sulphate of 10 parts, the inorganic base sodium carbonate of 5 parts and the water mixing of 60 parts by weight, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 35 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 50% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 30 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 300% water, 2% highly acid dyestuff, 1% weak acid dye, then at the temperature of 90 DEG C, dye 1200 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Embodiment 2:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 65 parts of solid contents by weight and 70 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
Under agitation make inorganic salts and inorganic base dissolve the inorganic salts sodium chloride of 20 parts, the inorganic base sodium bicarbonate of 8 parts and the water mixing of 80 parts by weight, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 30 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 70% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 50 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 800% water, 4% highly acid dyestuff, 2% weak acid dye, then at the temperature of 93 DEG C, dye 90 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Embodiment 3:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 60 parts of solid contents by weight and 80 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
Under agitation make inorganic salts and inorganic base dissolve the inorganic salts ammonium sulfate of 15 parts, the inorganic base NaOH of 9 parts and the water mixing of 85 parts by weight, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 40 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 30% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 70 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 500% water, 3% highly acid dyestuff, 1.5% weak acid dye, then at the temperature of 95 DEG C, dye 60 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Embodiment 4:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 40 parts of solid contents by weight and 50 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
By weight the water of the inorganic salts ammonium chloride of 13 parts, the mixture of inorganic base sodium carbonate and sodium bicarbonate of 6 parts and 70 parts is mixed and under agitation makes inorganic salts and inorganic base dissolve, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 45 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 60% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 40 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 1000% water, 6% highly acid dyestuff, 3% weak acid dye, then at the temperature of 91 DEG C, dye 100 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Embodiment 5:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 30 parts of solid contents by weight and 55 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
By weight the water of the mixture of the inorganic salts sodium sulphate of 18 parts and sodium chloride, the mixture of inorganic base sodium carbonate, sodium bicarbonate and NaOH of 10 parts and 65 parts is mixed and under agitation makes inorganic salts and inorganic base dissolve, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 50 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 40% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 60 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 600% water, 5% highly acid dyestuff, 2% weak acid dye, then at the temperature of 94 DEG C, dye 70 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Embodiment 6:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 50 parts of solid contents by weight and 60 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
By weight the water of the mixture of the inorganic salts sodium chloride of 16 parts, ammonium sulfate and ammonium chloride, the inorganic base sodium carbonate of 7 parts and 75 parts is mixed and under agitation makes inorganic salts and inorganic base dissolve, obtain solidification liquid;
1.3) dipping recombination process
First, be in the dipping tank of maceration extract of 40 DEG C by nylon 6/ polyethylene bicomponent fibers non-weaving cloth by temperature is housed, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 80% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin that temperature is the solidification liquid of 50 DEG C is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 900% water, 6% highly acid dyestuff, 2.5% weak acid dye, then at the temperature of 92 DEG C, dye 110 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), when buffing, select 150 order abrasive band buffing 1 time, adopting the number of times of brush roll napping machine napping is 1 time, finally obtains matte aqueous polyurethane superfine fiber synthetic leather.
Highly acid dyestuff belongs to ACID DYES, and ACID DYES is the dyestuff that a class dyes in acid medium.ACID DYES great majority contain sulfonate sodium, can be water-soluble, and bright in colour, chromatogram is complete.Be mainly used in the dyeing such as wool, silk and nylon fiber.Highly acid dyestuff requires to dye in stronger acid dye bath, and its molecular structure is simple, and molecular weight is low, contains sulfonic group or carboxyl, little to nylon fiber affinity, and on nylon fiber, even the moving of energy, dyes evenly, therefore also claim acid levelling colour.As Acid Red G (being C.I. azogeramine).
Weak acid dye belongs to ACID DYES, and weak acid dye is to generate weak acid dye by increasing molecular weight, introduce the groups such as fragrant sulfuryl or introducing the methods such as long carbochain in highly acid dyestuff.Molecular structure is more complicated, larger to nylon fiber affinity, can in weak acidic medium, dye nylon fiber, and to nylon fiber not damaged, coloured light is darker, and fastness increases, but not level dyeing.As Weakly Acid Brilliant Blue RAW (being C.I. acid blue 80).
The present invention further adopts buffing machine while passing through in buffing napping operation, select 150 object abrasive band buffing 1 time, then use brush roll napping machine napping 1 time, this abrasive band buffing coordinates the method for brush roll napping can reach the fine and closely woven neat good buffing effect of pile.
Matte aqueous polyurethane superfine fiber synthetic leather of the present invention, compared with matte solvent borne polyurethane superfine fiber chemical leather, has similar microstructure, better physical and mechanical properties, gas permeability, water vapor permeability, moisture absorption hydrofuge and feel characteristic.Key property contrast is as shown in table 1.
The key property contrast of two kinds of matte polyurethane ultrafine fiber synthetic leathers of table 1
Note: A sample is matte solvent borne polyurethane superfine fiber chemical leather; B sample is matte aqueous polyurethane superfine fiber synthetic leather; A sample and B sample adopt same nylon 6/ polyethylene (PA6/PE) bicomponent fibers non-weaving cloth as base material.
Claims (6)
1. a preparation method for matte aqueous polyurethane superfine fiber synthetic leather, is characterized in that, comprises the following steps:
1) dipping of non-weaving cloth and cation-type water-thinned polyurethane is compound
1.1) preparation of maceration extract
The water of the cation-type water-thinned polyurethane that is 30% by 20～65 parts of solid contents by weight and 35～80 parts mixes to obtain maceration extract;
1.2) preparation of solidification liquid
Under agitation make inorganic salts and inorganic base dissolve the inorganic salts of 10～20 parts, the inorganic base of 5～10 parts and the water mixing of 60～85 parts by weight, obtain solidification liquid;
1.3) dipping recombination process
First, by being equipped with in the dipping tank of maceration extract, make maceration extract soak into nylon 6/ polyethylene bicomponent fibers non-weaving cloth nylon 6/ polyethylene bicomponent fibers non-weaving cloth;
Secondly, the nylon soaking into 6/ polyethylene bicomponent fibers non-weaving cloth is passed through to a pair roller, extrude the maceration extract in the nylon 6/ polyethylene bicomponent fibers non-weaving cloth soaking into, the content of controlling maceration extract in nylon 6/ polyethylene bicomponent fibers non-weaving cloth is 30%～80% of nylon 6/ polyethylene bicomponent fibers non-weaving cloth weight;
Finally, the nylon 6/ polyethylene bicomponent fibers non-weaving cloth of extruding maceration extract, by the coagulating basin of solidification liquid is housed, is obtained to nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass;
2) toluene decrement is extracted out
Using toluene as solvent, the nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass that step 1) is obtained extracts, polyethylene in nylon 6/ polyethylene bicomponent fibers is extracted, the nylon 6/superfine fiber that forms pencil, makes nylon 6/ polyethylene bicomponent fibers aqueous polyurethane synthetic leather wet impregnation bass change nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass into;
3) bass dyeing
Taking the weight of nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass as benchmark, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass is added in dyeing machine, add again 300%～1000% water, 2%～6% highly acid dyestuff, 1%～3% weak acid dye, then at the temperature of 90～95 DEG C, dye 60～120 minutes, finally wash and be dried, nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass obtains dyeing;
4) buffing napping
Utilize the abrasive band in through type buffing machine to carry out buffing to the dyeing nylon 6/superfine fiber water based polyurethane synthetic leather wet impregnation bass in step 3), then use the napping of brush roll napping machine, finally obtain matte aqueous polyurethane superfine fiber synthetic leather.
2. the preparation method of matte aqueous polyurethane superfine fiber synthetic leather according to claim 1, is characterized in that: described inorganic salts are the mixture of one or more arbitrary proportions in sodium sulphate, sodium chloride, ammonium sulfate or ammonium chloride.
3. the preparation method of matte aqueous polyurethane superfine fiber synthetic leather according to claim 1, is characterized in that: described inorganic base is the mixture of one or more arbitrary proportions in sodium carbonate, sodium bicarbonate or NaOH.
4. the preparation method of matte aqueous polyurethane superfine fiber synthetic leather according to claim 1, is characterized in that: in described step 4), select 150 order abrasive band buffing 1 time when buffing, adopting the number of times of brush roll napping machine napping is 1 time.
5. the preparation method of matte aqueous polyurethane superfine fiber synthetic leather according to claim 1, is characterized in that: the temperature of described maceration extract is 30～50 DEG C.
6. the preparation method of matte aqueous polyurethane superfine fiber synthetic leather according to claim 1, is characterized in that: the temperature of described solidification liquid is 30～70 DEG C.
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| CN103497539B (en) * | 2013-08-22 | 2016-05-04 | 河北永泰柯瑞特化工有限公司 | One class superfine fiber chemical leather dedicated dye and preparation method thereof |
| CN104005237B (en) * | 2013-11-27 | 2016-01-13 | 四川大学 | A kind of impregnation method of the superfine fiber synthetic leather base cloth based on water-base resin |
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| CN105401451A (en) * | 2015-12-24 | 2016-03-16 | 福建隆上超纤有限公司 | Production method of high-performance suede superfine fiber synthetic leather for clothing |
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| CN108894003A (en) * | 2018-09-04 | 2018-11-27 | 四川大学 | A kind of superfine fibre suede and preparation method thereof generating negative oxygen ion |
| CN113417151B (en) * | 2021-07-08 | 2023-01-03 | 江苏聚杰微纤科技集团股份有限公司 | Environment-friendly PU artificial leather with oily-like cellular structure and preparation method thereof |
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