CN103541210B - The alkali washing method of the crosslinked non-ironing pure cotton fabric of tide - Google Patents
The alkali washing method of the crosslinked non-ironing pure cotton fabric of tide Download PDFInfo
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- CN103541210B CN103541210B CN201310482368.1A CN201310482368A CN103541210B CN 103541210 B CN103541210 B CN 103541210B CN 201310482368 A CN201310482368 A CN 201310482368A CN 103541210 B CN103541210 B CN 103541210B
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Abstract
The invention discloses the alkali washing method that a kind of tide is cross-linked non-ironing pure cotton fabric, comprise the steps: the pure cotton fabric through damp cross-linking reaction to wash through one clear water; Pad through first alkali lye again; By the damp state reaction zone be made up of selvage guide frame that Rong Buliang is 80-200m, under room temperature condition, alkali lye is permeated, time of penetration is 2-5min; Pad through second alkali lye again; Clear water is washed; Again in together and pickling; Last clear water is washed.Alkali washing method of the present invention is by padding in process at twice alkali lye, increase damp state reaction zone, the alkali washing process be cross-linked by tide is reduced to 1 washing by traditional repeatedly washing, namely control within 46ppm by means of only once washing the free formaldehyde that just tide of N-methylol compound can be cross-linked noniron finish, the friendly process in the safe range of GB 185ppm is effectively controlled by formaldehyde, which reduce technological process, energy-saving and cost-reducing, achieve and do not affecting the production of the green on the basis of quality.
Description
Technical field
The present invention relates to textile finishing technology, especially relate to the alkali washing method that a kind of tide is cross-linked non-ironing pure cotton fabric.
Background technology
Wrinkle proofing is as a common arrangement of fabric post-treatment, in view of with BTCA be representative formaldehydeless type of resin because of cost of manufacture high, the scale that temporarily also do not have high input in the non-ironing field of COTTON FABRIC uses, generally use at present wrinkle proofing resina be N-methylol compound, this type of resina just employs formaldehyde in building-up process, therefore the free formaldehyde in this type of finishing agent and the releasable for maldehyde content after arranging on fabric higher, the alkali washing process of tradition eccysis formaldehyde generally needs to carry out 2 ~ 5 times could will feel sad neutralization completely in fiber, long flow path, efficiency is low, production cost is high.
The crosslinked alkali washing process point following steps of tradition tide generally adopted at present:
Alkali cleaning-a large amount of clear water washes-alkali cleaning-clear water wash-neutralize wash-clear water washes
1, alkali lye pads: the Cotton Colored Woven Fabric after clear water previous cleaning fully infiltrated in the alkali lye of pH=10 ~ 11.Destroy the acid medium of damp cross-linking reaction fabric face, the cotton fiber after alkali immerging under the infiltration of alkali lye, there is a series of chemistry with the change of physics, interrupt carrying out further of damp cross-linking reaction;
2, clear water pads: the impurity such as free formaldehyde and unreacted resina washing thorough eccysis cloth cover after caustic dip neutralization reaction again through multiple tracks clear water;
3, alkali lye pads: the alkali lye that the fabric through fully washing pads pH=10 ~ 11 again makes alkali lye fully penetrate into fibrous inside, thoroughly interrupts the secondary response of damp crosslinked resin;
4, clear water pads: the alkali lye washing preliminary eccysis cloth cover after double alkalisation neutralization reaction again through 3 road clear water;
5, neutralizing acid pads: the acid solution fully through pH=4 ~ 5 after washing, in and cloth cover remnants band alkali;
6, clear water pads: rinse through last one clear water, remove the acid of fabric face, make fabric face pH maintain neutral range.
Consult Fig. 2, be the structural representation of the crosslinked alkaline cleaner of tide in conventional art, wherein, the water temperature of No. 21 water washing chambers is 40 DEG C; The temperature of No. 22 alkali cleaning casees is 40 DEG C; 23, the temperature of 24,25, No. 26 water washing chambers is 60 DEG C; The temperature of No. 27 alkali cleaning casees is 40 DEG C; 28, the temperature of 29, No. 210 water washing chambers is 60 DEG C; In No. 211 and the temperature of case be 50 DEG C; The temperature of No. 212 water washing chambers is 70 DEG C.The water of No. 22 water washing chambers overflows to forward 210,29, No. 28 water washing chambers step by step, and No. 26 water washing chamber water overflow to forward 25, No. 24 water washing chambers step by step.
Higher washing temperature and longer alkali cleaning flow process is have employed in the crosslinked alkali cleaning technical matters of tradition tide, reason is wherein: damp crosslink finishing is as known reactions degree noniron finish the most fully in the industry, its reaction principle is, under low temperature and strong acid catalyst condition, fabric certain containing damp rate time, adopt the resin of a large amount of crosslinked at low temperature and cellulosic molecule to carry out gentle reaction, reaction generates the covalent cross-linking of ehter bond.The object improving appearance ratings can be reached through damp crosslink finishing, the reaction of tide crosslink finishing is the most abundant, therefore it is large that more crosslinked than other formaldehyde controls difficulty, need all strictly to control at every procedure, if once the rear formaldehyde of washing is defective usually, then to take twice washing or add the methods such as formaldehyde catching agent to solve, to remove free formaldehyde.
The resina that current most domestic is all is all N-methylol compound, although washing process can be controlled within the scope of Environment Compatible Textiles standard permission at present, but fabric still Diazolidinyl Urea in follow-up use procedure, therefore traditional washing process needs, through multiple high temp washing, to stop the potential safety hazard of formaldehyde.And the large cost of washing process energy consumption of long flow process is high, the friendly process how realizing taking into account formaldehyde quality and reducing production cost is also as an industry difficult problem long-term existence.
Summary of the invention
Based on this, the invention provides the alkali washing method that a kind of tide is cross-linked non-ironing pure cotton fabric.
The concrete technical scheme solved the problems of the technologies described above is as follows:
Tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, comprises the steps:
(1) pure cotton fabric through damp cross-linking reaction is washed through one clear water;
(2) first alkali lye pads;
(3) by Rong Buliang be the damp state reaction zone be made up of selvage guide frame of 80-200m, under room temperature condition, alkali lye is permeated, time of penetration is 2-5min;
(4) second alkali lye pads;
(5) clear water is washed;
(6) in and pickling;
(7) clear water is washed.
Wherein in some embodiments, described appearance cloth amount is 160-200m, and time of penetration is 4-5min.
Wherein in some embodiments, the temperature of step (1) described clear water is 35-45 DEG C.
Wherein in some embodiments, the described alkali lye pH of step (2) is 10-12, temperature 35-45 DEG C.
Wherein in some embodiments, the described alkali lye pH of step (4) is 9-11, temperature 35-45 DEG C.
Wherein in some embodiments, the temperature of step (5) described clear water is 55-65 DEG C.
Wherein in some embodiments, step (6) described acid solution pH4.5-5.5, temperature 55-65 DEG C.
Wherein in some embodiments, step (7) is: at 55-65 DEG C, and the pH being washed till clear water is 5.5-7.
The alkali washing method that tide of the present invention is cross-linked non-ironing pure cotton fabric has the following advantages and beneficial effect:
(1) alkali washing method of the present invention is by padding in process at twice alkali lye, increase damp state reaction zone, the alkali washing process be cross-linked by tide is reduced to 1 washing by traditional repeatedly washing, namely control within 46ppm by means of only once washing the free formaldehyde that just tide of N-methylol compound can be cross-linked noniron finish, release formaldehyde controls within 185ppm, all in the safe range of GB, this alkali washing method shortens technological process, energy-saving and cost-reducing, achieve and do not affecting the production of the green on the basis of quality.Specifically, the region that tide state reaction zone is made up of selvage guide frame, can extend the action time that alkali lye penetrates into fibrous inside, after making alkali lye infiltrate into central reaction fully, again use neutralizing treatment, make to feel sad in fiber and neutralize completely, thoroughly interrupt the necessary requirement of resin crosslinks reversible reaction.And prove through a large amount of experiments, under the prerequisite taking into account machine cost and formaldehyde quality, infiltration duration is the most suitable within the scope of 2-5min.
(2) alkali washing method of the present invention: first clear water is washed, can the free formaldehyde of eccysis cloth cover and unreacted resin in advance, the impurity such as cross-linking reaction accessory substance; Pad through first alkali lye again, remove the acid medium of the damp crosslinked resin formula of fabric face in advance; Reached the damp state reaction zone be made up of several selvage guide framves of 80-200m again by Rong Buliang, the reaction time that first alkali lye penetrates into fibrous inside can be extended; Second alkali lye pads with in fully and feel sad in fibrous inside, thoroughly to interrupt proceeding of damp cross-linking reaction, stops the release of formaldehyde simultaneously; Wash through clear water again and can fully wash with the unreacted resina of eccysis, and the alkali lye of cloth cover remnants, reduce measuring with acid of next step neutralization; Rear together in and pickling can in and the alkali lye of cloth cover; The acid of the last eccysis of washing together cloth cover, reaches the faintly acid scope of pH5.5-7.
(3) in alkali washing method of the present invention, the temperature of washing lotion used is lower, can effectively prevent unreacted resina be hydrolyzed and generate formaldehyde.
Accompanying drawing explanation
Fig. 1 is the alkali washing method process chart of the crosslinked non-ironing pure cotton fabric of tide in embodiment 1;
Fig. 2 is the crosslinked alkali washing method process chart of tide in conventional art;
Description of reference numerals:
11, first water washing chamber, 12, first alkali cleaning case, 13, secondary alkali cleaning case, 14, secondary water tank-washer, 15, tertiary effluent tank-washer, 16, level Four water washing chamber, 17, in and case, 18, final stage water washing chamber, 19, damp state reaction zone.
21, water washing chamber, 22, concentrated base tank-washer, 23,24,25,26, water washing chamber, 27, light alkali cleaning case, 28,29,210, water washing chamber, 211, in and case, 212, water washing chamber;
Detailed description of the invention
Embodiment 1
Tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, comprises the steps:
(1) washed through one clear water by the pure cotton fabric through damp cross-linking reaction, the water temperature of described clear water is 40 DEG C;
(2) pad through first alkali lye, the pH of described alkali lye is 10-12, and temperature is 40 DEG C again;
(3) by Rong Buliang be 200m form damp state reaction zone by selvage guide frame, under room temperature condition, alkali lye is permeated, time of penetration is 5min; And damp method state reaction zone is also without any steam heater, is normal temperature;
(4) pad through second alkali lye, the pH of described alkali lye is 9-11, and temperature is 40 DEG C again;
(5) clear water is washed, and temperature is 60 DEG C;
(6) clear water is washed, and temperature is 60 DEG C;
(7) clear water is washed, and temperature is 60 DEG C;
(8) again in together and pickling, the pH of described acid solution is 4.5-5.5, and temperature is 60 DEG C;
(9) wash through clear water, the pH being washed till described clear water is 5.5-7, and temperature is 60 DEG C again.
In practice, its equipment therefor, consults Fig. 1,11, first water washing chamber, 12, first alkali cleaning case, 13, secondary alkali cleaning case, 14, secondary water tank-washer, 15, tertiary effluent tank-washer, 16, level Four water washing chamber, 17, in and case, 18, final stage water washing chamber, 19, damp state reaction zone.Wherein, the delivery port of final stage water washing chamber 18 connects the water inlet of level Four water washing chamber 16, and the delivery port of level Four water washing chamber 16 connects the water inlet of tertiary effluent tank-washer 15, and the delivery port of tertiary effluent tank-washer 15 connects the water inlet of secondary water tank-washer 14; The delivery port of secondary alkali cleaning case 13 connects the water inlet of elementary alkali cleaning case 12.The delivery port of primary water tank-washer 11 with in and the delivery port ground connection of case 17, namely final stage water washing chamber 18 is respectively toward level Four water washing chamber 16, tertiary effluent tank-washer 15, secondary water tank-washer 14 overflow.In and case 17 and primary water tank-washer 11 adopt respectively from overflow manner.Simultaneously primary water tank-washer 11, final stage water washing chamber 18, level Four water washing chamber 16 side entrance connect and extraneously supplement a large amount of fresh water, elementary alkali cleaning case 12 with in and case 17 side entrance is connected the supplementary a small amount of fresh water in the external world
Concrete technology flow process is (composition graphs 1 illustrates): the pure cotton fabric through damp cross-linking reaction is washed through one clear water, namely after first water washing chamber 11 clear water is washed, and the free formaldehyde of pre-eccysis cloth cover and unreacted resin, the impurity such as cross-linking reaction accessory substance; Pad through first alkali lye again, namely through first alkali cleaning case 12, remove the acid medium of the damp crosslinked resin formula of fabric face in advance; By the damp state reaction zone 19 be made up of selvage guide frame that Rong Buliang is 200m, this damp method state reaction zone is without any steam heater, also adopt from up to down overflow manner simultaneously, under room temperature condition, alkali lye is permeated, time of penetration is 5min, the reaction time that first alkali lye penetrates into fibrous inside can be extended, pad through second alkali lye after alkali lye infiltrates into central reaction fully, namely through time alkali cleaning case 13, double alkali lye pads, can fully in and feel sad in fibrous inside, thoroughly interrupt proceeding of damp cross-linking reaction, stop the release of formaldehyde simultaneously; Wash through clear water again, namely wash through secondary water tank-washer 14, tertiary effluent tank-washer 15, level Four water washing chamber 16 clear water, the unreacted resina of eccysis, and the alkali lye of cloth cover remnants, reduce measuring with acid of next step neutralization; In using again and pickling, namely through in and in case 17 and the alkali lye of cloth cover; Last washing together, namely through final stage water washing chamber 18, the acid of eccysis cloth cover, the pH being washed till clear water reaches the faintly acid scope of 5.5-7.
Embodiment 2
Tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, comprises the steps:
(1) washed through one clear water by the pure cotton fabric through damp cross-linking reaction, described clear water water temperature is 35-45 DEG C;
(2) pad through first alkali lye, the pH of described alkali lye is 10-12, and temperature is 35-45 DEG C again;
(3) by Rong Buliang be the damp state reaction zone be made up of selvage guide frame of 80m, under room temperature condition, alkali lye is permeated, time of penetration is 2min; And damp method state reaction zone is also without any steam heater, is normal temperature
(4) pad through second alkali lye, the pH of described alkali lye is 9-11, and temperature is 35-45 DEG C again;
(5) clear water is washed, and temperature is 60 DEG C;
(6) clear water is washed, and temperature is 60 DEG C;
(7) clear water is washed, and temperature is 60 DEG C;
(8) again in together and pickling, the pH of described acid solution is 4.5-5.5, and temperature is 60 DEG C;
(9) wash through clear water, the pH being washed till described clear water is 5.5-7, and temperature is 60 DEG C again.
Concrete technology flow chart and equipment therefor, refer to embodiment 1.
Embodiment 3
Tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, and its concrete steps are substantially the same manner as Example 1, and difference is: holding cloth amount in step (3) is 120m, and time of penetration is 3min.
Concrete technology flow chart and equipment therefor, refer to embodiment 1.
Embodiment 4
Tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, and its concrete steps are substantially the same manner as Example 1, and difference is: holding cloth amount in step (3) is 160m, and time of penetration is 4min.
Concrete technology flow chart and equipment therefor, refer to embodiment 1.
Embodiment 5
The effect of Evaluation operation example 1-4 alkali washing method
(1) experiment purpose
By comparative analysis, the removal effect of Evaluation operation example 1-4 PARA FORMALDEHYDE PRILLS(91,95).
(2) experimental technique
Use 50*40spoplin white orchid lattice Cotton Colored Woven Fabric in prior art, after processing with the alkali washing process of above-described embodiment 1-4 traditionally respectively, according to JIS(JIS L10418.1.4-2011) test free formaldehyde, AATCC(AATCC112-2008) test the standard method of release formaldehyde, detect the amount of free formaldehyde and release formaldehyde after different alkali washing process.
(3) experimental result
Concrete outcome is see table 1.
The different time of penetration of table 1 Different Alkali washing method is to pure cotton fabric Free-formaldehyde and releasable for maldehyde content contrast
As can be seen from the above table, the existing Cotton Colored Woven Fabric of same kind, after using present invention process processing, the free formaldehyde and the release formaldehyde that contrast traditional alkali washing process have obvious reduction.And the content of formaldehyde of new alkali washing process all in the normal tour of GB formaldehyde from <75ppm, within the safe range of release formaldehyde <300ppm.
As can be seen from the above table simultaneously, along with the prolongation of time, cloth cover free formaldehyde content reduces gradually, but as can be seen from Table 1, Rong Buliang is that 80m, time of penetration 2min have enough allowed alkali lye penetrate into fibrous inside, based on Machinery Design cost, the permeability apparatus that cloth amount is 80m, time of penetration 2min is held in final selection.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. tide is cross-linked an alkali washing method for non-ironing pure cotton fabric, it is characterized in that, comprises the steps:
(1) pure cotton fabric through damp cross-linking reaction is washed through one clear water;
(2) first alkali lye pads; The pH of described alkali lye is 10-12, and temperature is 35-45 DEG C;
(3) through holding the damp state reaction zone be made up of selvage guide frame that cloth amount is 80-200m, under room temperature condition, alkali lye is permeated, time of penetration is 2-5min;
(4) second alkali lye pads; The pH of described alkali lye is 9-11, and temperature is 35-45 DEG C;
(5) clear water is washed;
(6) in and pickling;
(7) clear water is washed.
2. tide according to claim 1 is cross-linked the alkali washing method of non-ironing pure cotton fabric, it is characterized in that, step (3) described appearance cloth amount is 160-200m, and time of penetration is 4-5min.
3. tide according to claim 1 is cross-linked the alkali washing method of non-ironing pure cotton fabric, it is characterized in that, the temperature of step (1) described clear water is 35-45 DEG C.
4. tide according to claim 1 is cross-linked the alkali washing method of non-ironing pure cotton fabric, it is characterized in that, the temperature of step (5) described clear water is 55-65 DEG C.
5. tide according to claim 1 is cross-linked the alkali washing method of non-ironing pure cotton fabric, it is characterized in that, during step (6) is described and the pH of pickling acid solution used be 4.5-5.5, temperature is 55-65 DEG C.
6. tide according to claim 1 is cross-linked the alkali washing method of non-ironing pure cotton fabric, it is characterized in that, step (7) described clear water wash into: at 55-65 DEG C, the pH being washed till clear water is 5.5-7.
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