CN108951233A - A kind of discoloration method of colored terylene fabric - Google Patents
A kind of discoloration method of colored terylene fabric Download PDFInfo
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- CN108951233A CN108951233A CN201810529659.4A CN201810529659A CN108951233A CN 108951233 A CN108951233 A CN 108951233A CN 201810529659 A CN201810529659 A CN 201810529659A CN 108951233 A CN108951233 A CN 108951233A
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- acetic acid
- glacial acetic
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- colored
- dacron
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/04—After-treatment with organic compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/34—Material containing ester groups
- D06P3/52—Polyesters
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Coloring (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The present invention relates to a kind of discoloration methods of colored terylene fabric, belong to waste textile application technology as the second resource field.Discoloration method of the invention specifically comprises the following steps: that colored terylene fabric to be processed is impregnated in liquid glacial acetic acid or is placed in the closed reactor containing glacial acetic acid saturated vapor by (1) and carries out decolorization, controlling decolorization temperature is 50~118 DEG C, and bleaching time is 1~120min；(2) reaction system after decolorization is cooled to room temperature, then takes out dacron, washed, dry after being centrifugated or drying, decoloration dacron must be dried；(3) glacial acetic acid in coloured waste liquid is recycled by the way of distillation and continues cycling through utilization.Discoloration method of the present invention has only used low-boiling glacial acetic acid, and glacial acetic acid plays the role of sweller and stripping agent simultaneously, and cost of material is low, less energy consumption；And decoloration treatment method of the present invention is simple, requires production equipment low, production cost is low, is easy to industrialize large-scale application.
Description
Technical field
The present invention relates to waste textile application technology as the second resource fields, specifically, coloured washing the present invention relates to a kind of
The discoloration method of synthetic fibre fabric.
Background technique
Terylene is the maximum synthetic fibers of usage amount, the waste and old terylene considerable amount generated after use.Discarded terylene
Fabric causes to vary in color due to source difference, and usual light coloured fabrics recycle value is high, and deep-colour fabric recycles benefit because being difficult to
With added value is low.Realize recycling for dacron, how critical issue is by the dyestuff or face in terylene waste material
Material is effectively peeled off.Mainly use the form of manual sorting by waste textile rough segmentation for light color and dark color two in industry at present
Class, this process need a large amount of manpowers, and operating environment is also more severe.
Dyeing terylene is generally adopted by relatively stable disperse dyes.By the dyestuff abjection on fabric, it is desirable that decoloration side
Method is simple and easy, and dyestuff, which strips, to work well, and agents useful for same meets environmental requirement, while fabric fibre is by compared with macrolesion,
Do not influence the later use of fabric after decolourizing.
Mainly there is strong reducing property or oxidizing substance using sodium hydrosulfite, rongalite, sodium hypochlorite, potassium permanganate etc. at present
For stripping agent, these technologies of stripping are the molecular structures using oxidation mechanism or reduction mechanism decomposition destruction disperse dyes, thus
Achieve the purpose that strip.Polyester fiber is in dyeing course, and fiber does not chemically react directly with dyestuff, but high temperature
Expand, in the gentle solution preocess of surface crystalline layer relaxation when processing in swelling of fiber, amorphous area, dyestuff is obtained through fiber surface infiltration
Enter to fibrous inside, to combine closely the effects of Van der Waals force, hydrogen bond with fiber molecule.Dyeing finishes, and fiber is cooling, surface knot
Crystal layer restores to the original state.In oxidation or reduction-decolor, if polyester fiber is not at extruding state, oxidant or reducing agent can not be deep
Enter to fibrous inside and reacted with dye molecule, the effect that causes to strip is undesirable.
Under the premise of not destroying molecular structure, highly polar solvent is can be used in stripping agent, such as dimethyl sulfoxide, N, N- diformazan
Base formamide, alcohol etc., such solvent have certain bio-toxicity, are easy to pollute the environment.
In recent years, stripping application No. is a kind of removing colour on terylene textile of 200930081606.9 patent report
Processing method, this method are that the dacron after swelling is placed in the solution of stripping containing main stripping agent, bleeding agent and dispersing agent
In be heat-treated, so that different classes of dyestuff be removed from fiber, but this method process flow is complicated, production cost
It is high.Application No. is 201610563267.0 patent application disclose it is a kind of realize solvent circulation containing wash waste textile decoloration
Technique, the technique are arranged in useless in solvent alcohol, decolourize in 100~250 DEG C of reaction kettles in two steps, but used in this method
Alcohol boiling point it is high, price is also higher.
It selects molecular structure should be selected smaller when stripping agent, and can be with the intermolecular stronger Van der Waals of formation of polyester fiber
Power perhaps hydrogen bond reagent strip stronger Van der Waals force or hydrogen bond are formed between agent molecule and polyester fiber while,
The Van der Waals force or hydrogen bond formed between disperse dyes molecule and polyester fiber molecule will weaken, or even be destroyed, from
And is conducive to disperse dyes and is stripped from terylene.Based on this, the application is made.
Summary of the invention
It is an object of the invention to provide for problem and the shortcomings of the prior art pointed in background technique
A method of dyestuff on dacron being stripped by medium of glacial acetic acid, this method utilizes glacial acetic acid in liquid or steam-like,
One step strips the dyestuff on dacron.
In order to realize above-mentioned purpose of the invention, inventor studies through a large number of experiments, has developed a kind of coloured wash
The discoloration method of synthetic fibre fabric, described method includes following steps:
(1) colored terylene fabric to be processed is impregnated in liquid glacial acetic acid or is placed in containing the close of glacial acetic acid saturated vapor
It closes and carries out decolorization in reaction kettle；
(2) reaction system after step (1) decolorization is cooled to room temperature, then takes out dacron, centrifugation point
From or dry to be placed in aqueous solvent and repeatedly washed, finally dry, decoloration dacron must be dried；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) be centrifugated or dry obtained by coloured waste liquid
Glacial acetic acid, recycling glacial acetic acid, which backs into, to be continued to recycle in reaction kettle.
Further, decolorization temperature as described in the above technical scheme is 50~118 DEG C, and bleaching time is
1~120min.
Further, the mass ratio of colored terylene fabric and glacial acetic acid as described in the above technical scheme be 1:(1~
100)。
Further, the washing times of fabric are preferably 2~4 times in above-mentioned technical proposal step (2).
Further, each secondary wash time is preferably 10~60min in above-mentioned technical proposal.
Further, colored terylene fabric as described in the above technical scheme is waste and old colored terylene fabric.
Further, waste and old colored terylene fabric as described in the above technical scheme be waste pure polyester colored fabric or
Waste and old colored fabric containing terylene.
Compared with prior art, a kind of discoloration method of colored terylene fabric of the invention has the following beneficial effects:
(1) discoloration method of the invention handles colored terylene fabric using glacial acetic acid under the high temperature conditions, can effectively weaken
It is formed by Van der Waals force or Hydrogen bonding forces between dye molecule and polyester fiber molecule, is conducive to disperse dyes and is knitted from terylene
It is stripped on object, and the method for the present invention does not destroy fabric molecular structure, it is textile to carry out decolorization front and back by the method for the invention
Can be substantially unchanged, therefore processing method of the present invention can realize the resource utilization of waste and old textile material；
(2) glacial acetic acid that uses of the present invention plays the role of sweller and stripping agent simultaneously, and the colourless low toxicity of glacial acetic acid is given birth to
Object small toxicity, environmental pollution are small；
(3) present invention also can be achieved at the same time as the way of distillation glacial acetic acid in centrifuge separation or coloured waste liquid obtained by drying with
Separation, the recycling of dyestuff, glacial acetic acid after the recovery is recyclable to be recycled, at the decoloration for subsequent waste and old colored terylene fabric
Reason can reduce fabric decoloration continuous production cost；
(4) discoloration method of the present invention has only used glacial acetic acid, and cost of material is low, and glacial acetic acid low boiling point, less energy consumption, separately
Outside, decoloration treatment method process flow of the present invention is simple, low to production equipment requirement, and production cost is low, is easy to industrialize big rule
Mould application.
Detailed description of the invention
Fig. 1 is the process flow chart of the discoloration method of colored terylene fabric of the invention.
Specific embodiment
Technical solution of the present invention is described in detail below by specific embodiment and attached drawing.Following reality
Applying example is only preferred embodiments of the present invention, is not the restriction that other forms are done to the present invention, any skill for being familiar with this profession
Art personnel are changed to the equivalent embodiment changed on an equal basis possibly also with the technology contents of the disclosure above.It is all without departing from this hair
Bright plan content, any simple modification or equivalent variations made according to the technical essence of the invention to following embodiment, falls
Within the scope of the present invention.
Embodiment 1
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) dacron that Disperse Red 3B dyes is impregnated in the reaction kettle equipped with liquid glacial acetic acid and is carried out at decoloration
Reason, decolorization temperature are 118 DEG C, bleaching time 30min, in which: the mass ratio of the dyed polyester textiles and glacial acetic acid
1:30；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 30min, wash repeatedly 3 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
Using D65 light source and 10 DEG C of visual fields, K/S value of the dacron of the present embodiment before and after decoloration, warp are tested respectively
Discovery is calculated, the K/S value decline 63.24% of the fabric after the present embodiment decoloration.
Embodiment 2
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) the disperse blue SGL dacron dyed is impregnated in the reaction kettle equipped with liquid glacial acetic acid and is carried out at decoloration
Reason, decolorization temperature are 118 DEG C, bleaching time 30min, in which: the mass ratio of the dyed polyester textiles and glacial acetic acid
1:30；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 30min, wash repeatedly 3 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 62.37% of the fabric after the present embodiment decoloration.
Embodiment 3
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) by waste and old colored terylene fabric to be processed hang in the closed reactor containing glacial acetic acid saturated vapor into
Row decolorization, bleaching time 90min, in which: the mass ratio 1:25 of the dyed polyester textiles to be processed and glacial acetic acid, institute
Stating glacial acetic acid saturated vapor is to obtain its constantly boiling by heating the glacial acetic acid liquid of reactor bottom；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 30min, wash repeatedly 3 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 76.67% of the fabric after the present embodiment decoloration.
Embodiment 4
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) dacron of methylene blue staining is impregnated in the reaction kettle equipped with liquid glacial acetic acid and is carried out at decoloration
Reason, decolorization temperature are 50 DEG C, bleaching time 120min, in which: the mass ratio of the dyed polyester textiles and glacial acetic acid
1:100；
(2) reaction system after step (1) decolorization is cooled to room temperature, then takes out dacron, centrifugation point
60min is washed from being placed in aqueous solvent, is washed repeatedly 2 times, is finally dried, obtain dry canescence dacron；
(3) the ice second according to glacial acetic acid boiling point, in the coloured waste liquid as obtained by after way of distillation recycling step (2) centrifuge separation
Acid, recycling glacial acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 66.56% of the fabric after the present embodiment decoloration.
Embodiment 5
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) waste pure polyester fabric is impregnated in the reaction kettle equipped with liquid glacial acetic acid and carries out decolorization, at decoloration
Managing temperature is 118 DEG C, bleaching time 1min, in which: the mass ratio 1:100 of the dyed polyester textiles and glacial acetic acid；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 10min, wash repeatedly 4 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 64.52% of the fabric after the present embodiment decoloration.
Embodiment 6
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(1) waste and old blended fabric (fabric is containing 65% terylene and 35% cotton) is impregnated in the reaction kettle equipped with liquid glacial acetic acid
Middle carry out decolorization, decolorization temperature are 90 DEG C, bleaching time 90min, in which: the dyed polyester textiles and ice second
The mass ratio 1:1 of acid；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 40min, wash repeatedly 3 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 64.52% of the fabric after the present embodiment decoloration.
Embodiment 7
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(2) by waste and old colored terylene fabric to be processed hang in the closed reactor containing glacial acetic acid saturated vapor into
Row decolorization, bleaching time 120min, in which: the mass ratio 1:1 of the dyed polyester textiles to be processed and glacial acetic acid, institute
Stating glacial acetic acid saturated vapor is to obtain its constantly boiling by heating the glacial acetic acid liquid of reactor bottom；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 60min, wash repeatedly 2 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 75.42% of the fabric after the present embodiment decoloration.
Embodiment 8
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(3) methylene blue staining dacron is hung in the closed reactor containing glacial acetic acid saturated vapor and is taken off
Color processing, bleaching time 90min, in which: the mass ratio 1:60 of the methylene blue staining dacron and glacial acetic acid, it is described
Glacial acetic acid saturated vapor is to obtain its constantly boiling by heating the glacial acetic acid liquid of reactor bottom；
(2) reaction system after step (1) decolorization is cooled to room temperature, then takes out dacron, centrifugation point
10min is washed from being placed in aqueous solvent, is washed repeatedly 4 times, is finally dried, obtain dry canescence dacron；
(3) the ice second according to glacial acetic acid boiling point, in the coloured waste liquid as obtained by way of distillation recycling step (2) centrifuge separation
Acid, recycling glacial acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 78.26% of the fabric after the present embodiment decoloration.
Embodiment 9
A kind of discoloration method of colored terylene fabric of the present embodiment, described method includes following steps:
(4) waste and old blended fabric (fabric is containing 67% terylene and 33% cotton) to be processed is hung on and is saturated containing glacial acetic acid
Decolorization, bleaching time 1min are carried out in the closed reactor of steam, in which: the dyed polyester textiles to be processed and ice
The mass ratio 1:100 of acetic acid, the glacial acetic acid saturated vapor are to continue it by heating the glacial acetic acid liquid of reactor bottom
It boils and obtains；
(2) reaction system after step (1) decolorization is cooled to room temperature, is then taken out dacron, after drying
It is placed in aqueous solvent and washs 30min, wash repeatedly 3 times, finally dry, obtain dry canescence dacron；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) dry obtained by glacial acetic acid in coloured waste liquid, return
Ice collection acetic acid, which backs into, to be continued to recycle in reaction kettle.
K/S value of the dacron of the present embodiment before and after decoloration is tested using the identical test method of embodiment 1, through counting
Discovery is calculated, the K/S value decline 76.06% of the fabric after the present embodiment decoloration.
Claims (7)
1. a kind of discoloration method of colored terylene fabric, it is characterised in that: described method includes following steps:
(1) colored terylene fabric to be processed is impregnated in liquid glacial acetic acid or is placed in and is containing glacial acetic acid saturated vapor closed anti-
It answers and carries out decolorization in kettle；
(2) reaction system after step (1) decolorization is cooled to room temperature, then takes out dacron, centrifuge separation or
It dries to be placed in aqueous solvent and repeatedly be washed, finally dried, decoloration dacron must be dried；
(3) according to glacial acetic acid boiling point, as way of distillation recycling step (2) be centrifugated or dry obtained by ice second in coloured waste liquid
Acid, recycling glacial acetic acid, which backs into, to be continued to recycle in reaction kettle.
2. the discoloration method of colored terylene fabric according to claim 1, it is characterised in that: the decolorization temperature
It is 50~118 DEG C, bleaching time is 1~120min.
3. the discoloration method of colored terylene fabric according to claim 1, it is characterised in that: the colored terylene fabric
Mass ratio with glacial acetic acid is 1:1~100.
4. the discoloration method of described in any item colored terylene fabrics according to claim 1~3, it is characterised in that: in step (2)
The washing times of fabric are 2~4 times.
5. the discoloration method of colored terylene fabric according to claim 4, it is characterised in that: each secondary wash time be 10~
60min。
6. the discoloration method of described in any item colored terylene fabrics according to claim 1~3, it is characterised in that: described has
Color dacron is waste and old colored terylene fabric.
7. the discoloration method of colored terylene fabric according to claim 6, it is characterised in that: the waste and old colored terylene
Fabric is waste pure polyester colored fabric or waste and old colored fabric containing terylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810529659.4A CN108951233A (en) | 2018-05-29 | 2018-05-29 | A kind of discoloration method of colored terylene fabric |
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| CN201810529659.4A CN108951233A (en) | 2018-05-29 | 2018-05-29 | A kind of discoloration method of colored terylene fabric |
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| CN115807335A (en) * | 2021-09-13 | 2023-03-17 | 南亚塑胶工业股份有限公司 | Method for recycling polyester fabric |
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| CN116289167B (en) * | 2023-05-17 | 2023-08-18 | 广东绿王新材料有限公司 | Textile decoloring method |
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Application publication date: 20181207 |
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