CN101787644A - Stripping processing method of textile printing defective items - Google Patents
Stripping processing method of textile printing defective items Download PDFInfo
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- CN101787644A CN101787644A CN201010125707A CN201010125707A CN101787644A CN 101787644 A CN101787644 A CN 101787644A CN 201010125707 A CN201010125707 A CN 201010125707A CN 201010125707 A CN201010125707 A CN 201010125707A CN 101787644 A CN101787644 A CN 101787644A
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Abstract
The invention discloses a stripping processing method of textile printing defective items, which implements stripping processing on printing defective items and particularly on dyeing defective items by using an active material which is generated by initiating and catalyzing an oxidant or a reducing agent under ultraviolet light and low temperature and has strong oxidability or reducibility as a stripping agent so as to be convenient for the rehandling or redyeing of textiles. Because of the adoption of various active materials which are generated by ultraviolet light initiation and optical catalysis as the stripping agent, the method can obtain an approving stripping effect under normal pressure and temperature, thereby avoiding the consumption of a large amount of energy sources in a traditional high-temperature stripping method and the use of a large amount of reducing agent, oxidant and the like. The stripping technology of the invention has the advantages of high efficiency, energy saving, emission reduction, simple equipment and process and short procedures.
Description
Technical field
The present invention relates to a kind of stripping processing method, particularly a kind ofly cause reductant or oxidant, the printing and dyeing defective product in the textiles is carried out the method that photocatalysis low temperature is stripped, belong to the textile dyeing and finishing technical field with ultraviolet light to textile printing defective items.
Background technology
In recent years, though because the continuous progress and the improvement of printing and dyeing process technology and equipment thereof, the percentage of A-class goods of printing and dyeing converted products constantly is improved, yet still can be in actual production because of the human operational error, reasons such as stop off, produce various look flowers, printing and dyeing defective product such as color spot happen occasionally, according to document " practicality of stripping agent CY-730 in DYED FABRICS is stripped " ([J]. dyeing and finishing technique, 2005,27 (12): P30-34) report, the defective product rate of returning something for repairs of general printing and dyeing mill can reach usually 3% or even higher, this shows, the processing of returning something for repairs of printing and dyeing defective product occupies critical role in the color processing of textiles.At present.The processing method of returning something for repairs to this class printing and dyeing defective product, usually can be dark by cover, strip to redye or change and the method processing of returning something for repairs such as dye, wherein, in actual production, use more to redye after stripping or to change dyeing technique again, as document " practicality of stripping agent CY-730 in DYED FABRICS is stripped " ([J]. dyeing and finishing technique, 2005,27 (12): P30-34), " stripping of dyeing defective product " ([J]. the printing and dyeing collected translation, 1999 (1): P26-33), " DYED FABRICS strip and return something for repairs technology " ([J]. printing and dyeing, 2006,32 (14): P12-16) and " cotton fabrics strip effect relatively " ([J]. dyeing and finishing technique, 2008,30 (3): P47-48] all made concrete report) etc.Stripping treatment to the printing and dyeing defective product, more again employing hydrogen peroxide in the actual production, clorox, chlorine dioxide, sodium hydrosulfite, rongalite, De Gulin, reductant-oxidants such as thiourea dioxide, and under hot conditions, utilize oxidant or reductant to decompose the active material that produces the coloring matter on the fiber (as dyestuff) color development system is destroyed with oxidisability or reducibility, thereby reach the stripping treatment purpose, as document " dyeing defective product strip " ([J]. the printing and dyeing collected translation, 1999 (1): P26-33), " the stripping effect relatively of cotton fabrics " ([J]. dyeing and finishing technique, 2008,30 (3): P47-48), " technology of returning something for repairs of polyester fiber disperse dyeing defect " ([J]. silk, 2007 (11): P38-39), the exploitation of technology " the variegated useless short flannel of polyamide fibre strip " ([J]. Hunan weaving higher junior college journal, 1997,7 (1): P46-51), " application of hydrogen peroxide in REACTIVE DYES is stripped " ([J]. hosiery industry, 1993 (1): P29-29,52), " craft discussion that clorox is stripped to terylene " ([J]. hosiery industry, 1990 (4): P26-28), " chlorine dioxide is to the decolouring of REACTIVE DYES " ([J]. textile journal, 2007,28 (3): P68-71), " DYED FABRICS strip and return something for repairs technology " ([J]. printing and dyeing, 2006,32 (14): P12-16), " the New Stripping reduction system cleans the research of disperse dyed polyester " ([J]. printing and dyeing assistant, 2007,24 (2): P34-36), " character of thiourea dioxide and the application in printing and dyeing industry thereof " ([J]. printing and dyeing, 1982, (2): P23-26) and " research of the NDA of the system of stripping " ([J]. hosiery industry, 2006 (3): report is all arranged P53-54).Yet, this class adopts high temperature initiated oxidation agent or reductant decomposes release of active agent traditional stripping method or technology, because the efficient that heat causes is low, not only need consume a large amount of chemicalss, and consume a large amount of energy, cause production cost to improve, residual all kinds of a large amount of chemicals had also caused bigger threat to environment during it was stripped and bathes simultaneously.
Thereby, how to realize the high efficient cryogenic initiation is carried out in conventional oxidation agent or reductant, thereby all kinds of high activity materials that effectively utilize its decomposition to discharge are realized the stripping treatment to the printing and dyeing defective product, to replace the traditional handicraft method, reduce the energy, reduce a large amount of uses of conventional chemical product, carry out cleaner production, the saving energy, lowering energy consumption and reducing pollutants discharge of realization textile printing and dyeing enterprises etc. have very important significance.
Summary of the invention
In order to overcome the deficiency that prior art exists, the purpose of this invention is to provide that a kind of technology is simple, tool energy-saving and emission-reduction and cleaner production characteristics, and can carry out stripping treatment method to the printing and dyeing defective product at normal temperatures and pressures.
Realize that the technical scheme that the object of the invention adopted mainly comprises the steps:
(1) reductant or oxidant being made into concentration is 0.10～10.00g L
-1The aqueous solution, the pH value of regulator solution is 2～12, makes stripping treatment liquid;
(2) textile printing defective items is carried out preliminary treatment in stripping treatment liquid after, put into stripping treatment bath of liquid ratio again and be in 1: 1～100 the batch (-type) or continous mode processing unit, bubbling air or oxygen, keeping temperature is 5～40 ℃, at wavelength is under the ultraviolet light conditions of 200～400nm, the printing and dyeing defective product is carried out 1～90 minute stripping treatment.
Described reductant is Na
2S
2O
4, Na
2SO
3Or Na
2S
2O
3In a kind of or their any combination.
Described oxidant is H
2O
2, Na
2O
2, NaBO
3.4H
2O, NaClO, NaClO
2, K
2S
2O
8Or CH
3A kind of in COOOH and its esters or their any combination.
The described textile printing defective items of step (2) carries out pretreated method in stripping treatment liquid be impregnation process, or be 50～120% the processing of padding with pick-up.
Described ultraviolet light is that the uviol lamp of 5～500W is a light source with power.
Described textile printing defective items is homofil textiles in native cellulose fibre, regenerated celulose fibre, acrylic fibers or the nylon fibre or its blending, intertexture.
The accessible printing and dyeing defective product of technical solution of the present invention form can be woven fabric, knitted fabric, non-weaving cloth or yarn.
Stripping processing method provided by the present invention according to necessary requirement, specifically can carry out in various degree stripping treatment to the printing and dyeing defective product, to be applicable to returning something for repairs or redying of textiles.
Compared with prior art, remarkable advantage of the present invention is: owing to adopted ultraviolet light to cause and light-catalysed technical scheme, traditional reductant-oxidant is under the initiation and catalysis of light, especially ultraviolet light high-energy photon, discharge active material thereby can under cryogenic conditions, decompose with strong oxidizing property or reducibility, simultaneously the high energy ultraviolet photon also can with oxygen (O
2) and H
2The O effect generates negative oxygen ion free radical with strong oxidizing property and hydroxyl radical free radical etc.; These active materials can diffuse into phase in solution and the fiber, thereby can produce the effect of stripping to set dyestuff on the fiber.Thereby, the present invention is when stripping to the printing and dyeing defective product, need not to use high temperature to cause reductant or oxidant decomposition, can realize at normal temperatures and pressures textiles being carried out the different stripping treatment that require, its pH value wide accommodation causes and the catalytic efficiency height, and pollutant is residual few in the raffinate of stripping, thereby present technique has remarkable advantages such as saving energy, lowering energy consumption and reducing pollutants discharge, equipment and technology is simple, easy to operate, has boundless application prospect in the cleaner production of textile printing and dyeing industry.
Description of drawings
Fig. 1 is a kind of textile printing defective items photocatalysis stripping treatment batch (-type) device schematic diagram that the embodiment of the invention provides;
Wherein: 1, power supply wiring (power supply slightly); 2, batch (-type) processing unit; 3, quartz glass tube; 4, low pressure mercury lamp; 5, colored textile; 6, oxygen-increasing device.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment 1
Present embodiment adopts hydrogen peroxide (H
2O
2) ultraviolet light low temperature cause the impregnation catalyst method of stripping the dyeing defective product carried out stripping treatment, it is 1.20g L that the liquid of stripping consists of concentration
-1Hydrogen peroxide (H
2O
2) aqueous solution, and regulator solution pH to 4.0; Join in the reaction unit by 1: 50 bath raio again.
The reaction unit that present embodiment adopts is the intermittent reaction device.Referring to accompanying drawing 1, in batch (-type) processing unit 2, oxygen-increasing device 6 is installed, adopt oxygen increasing pump continuous bubbling air in the bath of stripping; Quartz glass tube 3 and low pressure mercury lamp 4 are installed, present embodiment is a ultraviolet source with 1 8W low pressure mercury lamp, power supply wiring 1 (power supply does not draw) is connected low pressure mercury lamp, add the pending printing and dyeing defective product 5 and the prefabricated liquid of stripping after, it is carried out 30min room temperature (20 ℃) catalysis stripping treatment.
In the present embodiment, the printing and dyeing defective product is semi-finished product pure cotton woven fabric (140.0g m
-2) look flower defective product in reactive red M-3BE 100% (C.I. REACTIVE Red 195) normal dyeing technology dyeing, its dyeing condition is: 1.0% (o.m.f.) reactive red M-3BE, 100% dyestuff, 40.0g L
-1Salt, 10.0gL
-1NaCO
3, fixation pH is 10.5, bath raio 1: 50; Go into to dye for 40 ℃, dye with salt is short behind the 15min, then with 2.0 ℃ of min
-1Be warmed up to 80 ℃, add the alkali fixation again, the fixation time is 30min.Dye after soap boiling is handled for 2 times, its process conditions are: 2.0g L
-1Soap powder, bath raio are 1: 50, locate 15min for 85 ℃.With reference to above-mentioned treatment step and technology, the experimental result of stripping of the printing and dyeing defective product after the present embodiment method is handled is as follows.
1. the effect of stripping
The effect of stripping of printing and dyeing defective product adopts the rate of stripping to characterize, and its rate of stripping is calculated by following formula:
In the formula: (K/S)
0For the surperficial color depth value of former printing and dyeing defective product at maximum characteristic absorption wavelength place (adopts the automatic colour photometer test of Utrascan XE type, HunterLab Ltd, the U.S.; Folding 8 layers of sample is got 10 times arithmetic mean of instantaneous value); (K/S) be the surperficial color depth value (strip face) of back textiles of stripping at same characteristic absorption wavelength place.
2. fabric strength
Warp direction stretching ultimate strength before and after the fabric treating is tested according to the galley proof method among the GB GB/T 3923.1-1997.Fabric is balance 24 hours in air earlier, accurately revises behind the yarn of limit to go up at YG-026A type multifunction electronic fabric strength machine (Changzhou Textile Machinery Plant No.2) and measures its tension failure brute force, and its strength retention press the calculating of following formula formula:
In the formula: F
1Be the tension failure brute force of DYED FABRICS before stripping, F
2Tension failure brute force for the back fabric of stripping.
Table 1 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 1
Can find out that by the test result shown in the table 1 ultraviolet light low temperature causes and catalysis hydrogen peroxide (H
2O
2) the technology of stripping can have the effect of stripping preferably to the dyeing defective product, when stripping treatment 30min, its rate of stripping surpasses 80%, and the strength retention of fabric is higher after the stripping treatment.Thereby ultraviolet light causes hydrogen peroxide (H
2O
2) the catalysis method of stripping can realize at normal temperatures and pressures to printing and dyeing defective product stripping treatment.
Embodiment 2
Present embodiment adopts hydrogen peroxide (H
2O
2) ultraviolet light low temperature cause and to pad the catalysis method of stripping the dyeing defective product is carried out stripping treatment.Bath raio preparation by 1: 30 contains 0.90g L
-1Aqueous hydrogen peroxide solution, regulate pH to 6.0, with this solution as padding liquid, dyed cotton fabric defective product two among the embodiment 1 is soaked two roll (pick-up is 100%), then fabric is entirely placed accompanying drawing 1 quartz socket tube 3 peripheries, press the method for embodiment 1, to the COTTON FABRIC of reactive red M-3BE 100% dyeing at ambient temperature (25 ℃) carry out photocatalysis strip 20min of place and 40min respectively, its concrete steps and other condition are as described in the embodiment 1.
Table 2 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 2
Can see by the data shown in the table 2, adopt hydrogen peroxide (H
2O
2) ultraviolet light low temperature cause the catalysis method of stripping of padding, be under 6.0 the faintly acid and 100% pick-up condition at pH, even stripping treatment 20min, also can have the rate of stripping preferably to the look of 1.0% (o.m.f.) reactive red M-3BE, 100% dyeing COTTON FABRIC flower defective product, and after the stripping treatment strength retention of fabric near 90%.Simultaneously according to stripping requirement, process conditions such as the time of can stripping by the control photocatalysis further improve the effect of stripping, and the strength retention of taking into account fabric simultaneously is in tolerance band.
Present embodiment adopts potassium peroxydisulfate (K
2S
2O
8) ultraviolet light low temperature cause the impregnation catalyst method of stripping the dyeing defective product carried out stripping treatment, the liquid of stripping is respectively 0.60g L
-1With 2.00g L
-1Potassium peroxydisulfate (K
2S
2O
8) aqueous solution, and regulator solution pH to 2.0.Join in the intermittent reaction device by 1: 30 bath raio then, press the method for embodiment 1, to embodiment 1 middle cotton coloration of textile materials defective product at ambient temperature (20 ℃) carry out the photocatalysis 30min that strips, its step and other condition are as described in the embodiment 1.
Table 3 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 3
Can see by the data shown in the table 3, even at potassium peroxydisulfate low concentration (0.60g L
-1) photocatalysis strip under the condition, reactive red M-3BE 100% dyeing defective product is through room temperature treatment 30min, its rate of stripping can be up to 86.9%, and the strength retention of handling the back fabric is 91.1%, shows good strip effect and good fabric strength retention characteristic.Table 3 also shows simultaneously, increases the consumption of potassium peroxydisulfate, and the rate of stripping of dyeing defective product can further improve, but the brute force of fabric also has to a certain degree decline.Thereby can satisfy of the requirement of different defective product by control oxidant consumption and the photocatalysis technologies such as time of stripping to rate of stripping and fabric strength retention rate.
Present embodiment adopts potassium peroxydisulfate (K
2S
2O
8) ultraviolet light low temperature cause and to pad the catalysis method of stripping the dyeing defective product is carried out stripping treatment.Bath raio preparation by 1: 30 contains 10.00g L
-1Potassium peroxydisulfate (K
2S
2O
8) aqueous solution, regulate pH to 2.0, with this solution as padding liquid, dyed cotton fabric defective product two among the embodiment 1 is soaked two roll (pick-up is 100%), then fabric is entirely placed accompanying drawing 1 quartz socket tube 3 peripheries, press the method for embodiment 1, the COTTON FABRIC with reactive red M-3BE 100% dyeing is carried out photocatalysis stripping treatment 20min under 30 ℃ of conditions, its concrete steps and other condition are as described in the embodiment 1.
Table 4 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 4
Can see by the data shown in the table 4, adopt potassium peroxydisulfate (K
2S
2O
8) ultraviolet light low temperature cause and to pad the catalysis method of stripping, when under 30 ℃ of conditions the cotton fabric dyeing process defective product after padding being handled 20min, its rate of stripping can reach 85.0%, demonstrate the good catalysis effect of stripping, and the strength retention of fabric also surpasses 80%.This shows potassium peroxydisulfate (K
2S
2O
8) ultraviolet light cause the catalysis method of stripping and also can adopt low temperature to pad mode, under normal temperature condition, realize stripping treatment to the dyeing defective product.
Present embodiment adopts sodium hydrosulfite (Na
2S
2O
4) ultraviolet light low temperature cause the impregnation catalyst method of stripping the dyeing defective product carried out stripping treatment, the liquid of stripping consists of 0.60g L
-1Sodium hydrosulfite (Na
2S
2O
4) aqueous solution, and regulator solution pH to 6.0.Join in the intermittent reaction device by 1: 80 bath raio then, press the method for embodiment 1, to embodiment 1 middle cotton coloration of textile materials defective product at ambient temperature (25 ℃) carry out photocatalysis strip 30min and 90min respectively, its step and other condition are as described in the embodiment 1.
Table 5 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 5
Can see by the data shown in the table 5, adopt sodium hydrosulfite (Na
2S
2O
4) ultraviolet light low temperature cause the impregnation catalyst method of stripping, even at low concentration (0.60g L
-1) and solutions of weak acidity under (pH6.0), through room temperature stripping treatment 30min, also can make the rate of stripping of dyeing defective product reach 85.9%, and the strength loss of fabric less (strength retention is 94.3%).And prolonging the stripping treatment time, the rate of stripping of fabric is improved significantly, but certain reduction also appears in its brute force simultaneously.This shows sodium hydrosulfite (Na
2S
2O
4) ultraviolet light low temperature cause the impregnation catalyst method of stripping and on the printing and dyeing defective product, have the effect of stripping of catalysis preferably, if by conditions such as change technological parameters, when realization is stripped in various degree to the printing and dyeing defective product, also can take into account the strength loss of fabric in tolerance band.
Present embodiment adopts sodium hydrosulfite (Na
2S
2O
4) ultraviolet light low temperature cause and to pad the catalysis method of stripping the dyeing defective product is carried out stripping treatment.Bath raio preparation by 1: 30 contains 1.50g L
-1Sodium hydrosulfite (Na
2S
2O
4) aqueous solution, regulate pH to 2.0, with this solution as padding liquid, dyed cotton fabric defective product two among the embodiment 1 is soaked two roll (pick-up is respectively 80% and 120%), then fabric is entirely placed accompanying drawing 1 quartz socket tube 3 peripheries, press the method for embodiment 1, to the COTTON FABRIC of reactive red M-3BE 100% dyeing at ambient temperature (25 ℃) carry out photocatalysis stripping treatment 25min respectively, its concrete steps and other condition are as described in the embodiment 1.
Table 6 is to adopt the described method of present embodiment, to the catalysis of the reactive red M-3BE 100% dyeing defective product experimental result of stripping.
Table 6
Can see by the data shown in the table 6, adopt sodium hydrosulfite (Na
2S
2O
4) ultraviolet light low temperature cause and to pad the catalysis method of stripping, under than low-reductant consumption condition, the dyeing defective product of different pick-up rates is all had the effect of stripping of catalysis preferably, its strength retention of respectively handling fabric sample is also higher simultaneously.Table 6 shows that also improving the pick-up height helps protecting fabric strength simultaneously, and the rate of stripping of fabric is had certain negative effect.
The present invention adopts the ultraviolet light low temperature of oxidant or reducing agent to cause and the catalysis technique scheme, thereby utilize it to decompose all kinds of high activity materials that discharge, free radical, superoxide radical such as the tool strong oxidizing property, and/or the reactive intermediate etc. with strong reducing property is stripping agent, and by mutually the transfer in solution phase and the fiber of these active materials, realize in fiber surface and the fiber mutually in the stripping of set dyestuff. Thereby compare with traditional oxidation or the reducing process technology of stripping, stripping method of the present invention and technology do not need hot conditions, can realize stripping in various degree to the printing and dyeing defective product at normal temperatures and pressures, and its bath pollutant of stripping is residual few, equipment and technology are simple, flow process is short, have the characteristics such as energy-saving and emission-reduction, cleaner production of highly significant, thereby its application prospect is boundless.
Claims (6)
1. the stripping processing method of a textile printing defective items is characterized in that comprising the steps:
(1) reductant or oxidant being made into concentration is 0.10～10.00g L
-1The aqueous solution, the pH value of regulator solution is 2～12, makes stripping treatment liquid;
(2) textile printing defective items is carried out preliminary treatment in stripping treatment liquid after, put into stripping treatment bath of liquid ratio again and be in 1: 1～100 the batch (-type) or continous mode processing unit, bubbling air or oxygen, keeping temperature is 5～40 ℃, at wavelength is under the ultraviolet light conditions of 200～400nm, the printing and dyeing defective product is carried out 1～90 minute stripping treatment.
2. the stripping processing method of textile printing defective items according to claim 1, it is characterized in that: described reductant is Na
2S
2O
4, Na
2SO
3Or Na
2S
2O
3In a kind of or their any combination.
3. the stripping processing method of textile printing defective items according to claim 1, it is characterized in that: described oxidant is H
2O
2, Na
2O
2, NaB0
34H
20, NaClO, NaClO
2, K
2S
2O
8Or CH
3A kind of in COOOH and its esters or their any combination.
4. the stripping processing method of textile printing defective items according to claim 1, it is characterized in that: the described textile printing defective items of step (2) carries out pretreated method in stripping treatment liquid be impregnation process, or be 50～120% the processing of padding with pick-up.
5. the stripping processing method of textile printing defective items according to claim 1 is characterized in that: described ultraviolet light is that the uviol lamp of 5～500W is a light source with power.
6. the stripping processing method of textile printing defective items according to claim 1 is characterized in that: described textile printing defective items is homofil textiles in native cellulose fibre, regenerated celulose fibre, acrylic fibers or the nylon fibre or its blending, intertexture.
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