CN116219731A - Method for dyeing and finishing and whitening chemical fiber by using chemical fiber and fluorescent whitening agent raw powder - Google Patents
Method for dyeing and finishing and whitening chemical fiber by using chemical fiber and fluorescent whitening agent raw powder Download PDFInfo
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- CN116219731A CN116219731A CN202310042855.XA CN202310042855A CN116219731A CN 116219731 A CN116219731 A CN 116219731A CN 202310042855 A CN202310042855 A CN 202310042855A CN 116219731 A CN116219731 A CN 116219731A
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- 230000002087 whitening effect Effects 0.000 title claims abstract description 107
- 239000006081 fluorescent whitening agent Substances 0.000 title claims abstract description 89
- 239000000835 fiber Substances 0.000 title claims abstract description 77
- 239000000843 powder Substances 0.000 title claims abstract description 73
- 239000000126 substance Substances 0.000 title claims abstract description 72
- 238000004043 dyeing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000005282 brightening Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229920004933 Terylene® Polymers 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920002334 Spandex Polymers 0.000 claims description 5
- 229920006221 acetate fiber Polymers 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 239000004759 spandex Substances 0.000 claims description 5
- 239000004760 aramid Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 125000000355 1,3-benzoxazolyl group Chemical group O1C(=NC2=C1C=CC=C2)* 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 239000002415 cerumenolytic agent Substances 0.000 abstract description 5
- 238000005470 impregnation Methods 0.000 abstract description 4
- 229920000728 polyester Polymers 0.000 description 37
- 239000004744 fabric Substances 0.000 description 32
- 239000000243 solution Substances 0.000 description 19
- 238000002360 preparation method Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000012736 aqueous medium Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000005811 Viola adunca Nutrition 0.000 description 1
- 240000009038 Viola odorata Species 0.000 description 1
- 235000013487 Viola odorata Nutrition 0.000 description 1
- 235000002254 Viola papilionacea Nutrition 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009980 pad dyeing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/60—Optical bleaching or brightening
- D06L4/607—Optical bleaching or brightening in organic solvents
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detergent Compositions (AREA)
Abstract
The embodiment of the invention discloses a method for dyeing and whitening chemical fibers by using raw powder of a fluorescent whitening agent. The method comprises the following steps: uniformly mixing the fluorescent whitening agent raw powder, water and liquid wax to obtain whitening treatment liquid; placing the chemical fiber into a whitening treatment liquid, and performing whitening treatment at a target temperature to obtain the whitened chemical fiber; and cleaning and drying the whitened chemical fiber. The invention prepares the whitening treatment liquid composed of the fluorescent whitening agent raw powder, water and liquid wax, so that the fluorescent whitening agent raw powder can be dissolved in the liquid wax and transferred into the chemical fiber under the high-temperature and high-pressure impregnation condition after the chemical fiber is placed in the whitening treatment liquid, thereby realizing the excellent effect of the fluorescent whitening agent raw powder for whitening the chemical fiber, and meanwhile, the liquid wax solvent is easy to be environment-friendly, easy to recycle and free from polluting the environment.
Description
Technical Field
The invention relates to the technical field of chemical fiber whitening, in particular to a method for dyeing and whitening chemical fibers by using raw powder of a chemical fiber and a fluorescent whitening agent.
Background
The fluorescent whitening agent emits blue-violet fluorescence after absorbing ultraviolet light, the intensity of the fluorescent whitening agent exceeds the intensity of the original visible light projected on the treated object, and the apparent whiteness of the article is improved.
Currently, fluorescent whitening agents are used for whitening terylene, and mainly comprise pre-spinning whitening (stock solution whitening) and dyeing and finishing whitening. Wherein dyeing and finishing whitening refers to that the spun polyester fiber and fabric are subjected to high-temperature high-pressure dip dyeing, hot melt pad dyeing and the fluorescent whitening agent is diffused into the fiber by the action of certain auxiliary agents and uniformly distributed, adsorbed and fixed.
However, the existing fluorescent whitening agent raw powder for whitening polyester is generally low in solubility in an aqueous medium, and mainly because the fluorescent whitening agent has no water-soluble groups in molecules, is flat and has large intermolecular force, so that the produced raw powder is a multi-molecular aggregate, has large particle size and is indissolvable or dispersible in water. Even after a part of fluorescent whitening agent molecules are dispersed in an aqueous medium at high temperature and high pressure and intermolecular collision occurs, aggregation phenomenon is very easy to occur.
Disclosure of Invention
The invention aims to solve the technical problem that the chemical fiber cannot be whitened by adopting a raw powder dyeing and whitening mode in the prior art.
In order to solve the technical problems, in a first aspect, an embodiment of the present invention provides a method for dyeing and whitening chemical fibers with a fluorescent whitening agent, which includes:
s1, uniformly mixing fluorescent whitening agent raw powder, water and liquid wax to obtain whitening treatment liquid;
s2, placing the chemical fiber into a whitening treatment liquid, and performing whitening treatment at a target temperature to obtain the whitened chemical fiber;
and S3, cleaning and drying the whitened chemical fiber.
Further, in the method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder, the fluorescent brightening agent raw powder is benzoxazole fluorescent brightening agent raw powder.
Further, in the method for dyeing and finishing the whitening chemical fiber by using the fluorescent whitening agent raw powder, the fluorescent whitening agent raw powder is one or more of fluorescent whitening agent raw powder OB-1, fluorescent whitening agent raw powder OB-2 and fluorescent whitening agent raw powder OB-3.
Further, in the method for dyeing and finishing and whitening the chemical fibers by using the fluorescent whitening agent raw powder, the dosage of the fluorescent whitening agent raw powder is 0.00125-0.05% of the mass of the chemical fibers.
Further, in the method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder, the volume ratio of the water content of the brightening treatment fluid is 50-90%.
Further, in the method for dyeing and finishing the whitening chemical fiber by using the fluorescent whitening agent raw powder, the chemical fiber is one or more of nylon, terylene, spandex, aramid fiber and acetate fiber.
Further, in the method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder, the target temperature is 90-140 ℃.
Further, in the method for dyeing and whitening the chemical fiber by using the fluorescent whitening agent, the chemical fiber is subjected to whitening treatment for 0-120min at the target temperature.
Further, in the method for dyeing and whitening chemical fibers with the fluorescent whitening agent, the bath ratio of the chemical fiber whitening treatment liquid is (15-100): 1.
In a second aspect, the embodiment of the invention also provides a chemical fiber, which is prepared by the method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder in the first aspect.
Compared with the prior art, the invention prepares the whitening treatment liquid composed of the fluorescent whitening agent raw powder, water and liquid wax, so that the fluorescent whitening agent raw powder can be dissolved in the liquid wax and transferred into the chemical fiber under the high-temperature and high-pressure impregnation condition after the chemical fiber is placed in the whitening treatment liquid, thereby realizing the excellent effect of the fluorescent whitening agent raw powder for whitening the chemical fiber, and meanwhile, the liquid wax solvent is easy to environment-friendly, easy to recycle and free from polluting the environment.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In order to solve the problems in the prior art, the embodiment provides a method for dyeing and whitening chemical fibers by using fluorescent whitening agent raw powder, which comprises the following steps:
s1, uniformly mixing fluorescent whitening agent raw powder, water and liquid wax to obtain whitening treatment liquid;
s2, placing the chemical fiber into a whitening treatment liquid, and performing whitening treatment at a target temperature to obtain the whitened chemical fiber;
and S3, cleaning and drying the whitened chemical fiber.
The chemical fiber can be one or more of nylon, terylene, spandex, aramid fiber and acetate fiber.
In some embodiments, the optical brightener raw powder is one or more of optical brightener OB-1 raw powder, optical brightener OB-2 raw powder, optical brightener OB-3 raw powder.
The fluorescent whitening agent raw powder is raw powder which is not subjected to any treatment, the fluorescent whitening agent raw powder is preferably OB-1, and the fluorescent whitening agent OB-1 has a molecular structural formula:
in some embodiments, the chemical fibers are one or more of nylon, polyester, spandex, aramid, acetate fibers, and the chemical fibers mentioned herein are preferably polyester fibers.
Wherein, in the industry, when the fluorescent whitening agent OB-1 raw powder is adopted to dye and whiten the terylene, concentrated sulfuric acid is generally adopted to dissolve the fluorescent whitening agent OB-1 raw powder and a dispersing auxiliary agent is added to disperse the fluorescent whitening agent OB-1 raw powder, but the dyeing and whitening leveling property of the terylene still has the defect. Meanwhile, the fluorescent whitening agent OB-1 raw powder, a dispersing agent, a defoaming agent and the like are ground and then centrifuged to prepare 0.1-0.2 mu m fluorescent whitening agent OB-1 particles, so that the fluorescent whitening agent OB-1 is easy to uniformly disperse in water and uniformly dye on polyester fibers, but the production process of the fluorescent whitening agent OB-1 has long time and high production cost, and is difficult to be competitive in the market of whitening the polyester fibers.
The method solves the problem that the fluorescent whitening agent OB-1 raw powder is difficult to whiten the chemical fibers by a dyeing and finishing method in the prior art, and only needs to add the liquid wax solvent and water as an accelerating agent, and the fluorescent whitening agent OB-1 raw powder is dissolved in the solvent and transferred into the chemical fibers under the high-temperature and high-pressure impregnation condition, so that the excellent effect of whitening the chemical fibers by the fluorescent whitening agent OB-1 raw powder is realized, and the liquid wax solvent is easy to environment-friendly, easy to recycle and free from polluting the environment.
In some embodiments, the amount of the fluorescent whitening agent raw powder is 0.00125-0.05% of the mass of the chemical fiber, the volume ratio of the water content of the whitening treatment liquid is 50-90%, the target temperature is 90-140 ℃, the chemical fiber is subjected to whitening treatment for 0-120min at the target temperature, and the bath ratio of the chemical fiber whitening treatment liquid is (15-100): 1.
The technical scheme of the present application is specifically described below.
Example 1
Carrying out dyeing and whitening treatment on 2g of polyester cloth by using 50mL of treatment solution (namely bath ratio 25:1) containing 50% of water and containing 0.5mg (namely 0.025% o.m.f) of fluorescent whitening agent OB-1 at 90-140 ℃ for 60 min;
mixing 25mg of fluorescent whitening agent OB-1 raw powder and 250mL of liquid wax solution, and uniformly stirring to complete the preparation of 100mg/L whitening treatment liquid. Taking 5mL of 100mg/L whitening treatment liquid, adding 20mL of liquid wax solution and 25mL of water to prepare treatment liquid with water content of 50%;
putting 2g of polyester fabric and 50mL of the prepared whitening treatment liquid into a dyeing cup, heating to 90-140 ℃ in a dyeing machine, preserving heat for 60min to finish dyeing and whitening treatment, washing the whitened polyester, removing liquid wax solution remained on the polyester, and drying.
Whiteness of the whitened polyester cloth was measured using WI (CIE) standard, whitening uniformity of the whitened polyester cloth was observed under uv lamp irradiation, and whether the whitened Bai Diguan cloth exhibited a fluorescent whitening agent (green) was observed under sunlight, and the data are shown in table 1.
TABLE 1 whitening effect at different whitening temperatures
As can be seen from Table 1, the whiteness at 130℃is optimal, and the fluorescent whitening effect is uniform and does not exhibit a natural color.
Example two
2g of polyester cloth is subjected to dyeing and whitening treatment by using 50mL of treatment liquid (namely bath ratio of 25:1) containing 50% of water and containing 0.025mg (namely 0.00125% o.m.f) to 1mg (namely 0.05% o.m.f) of fluorescent whitening agent OB-1, and the temperature is kept at 130 ℃ for 60 min;
respectively taking 1,2,4, 10, 20, 24, 30, 35, 40mg of fluorescent whitening agent OB-1 raw powder and 1L of liquid wax solution, mixing uniformly, and completing the preparation of the whitening treatment solutions with different concentrations;
2g of polyester cloth, 25mL of water and 25mL of the prepared whitening treatment liquid with different concentrations are taken to be total to 50mL (bath ratio is 25:1, the mass of the fluorescent whitening agent OB-1 is 0.025mg (0.00125% o.m.f), 0.05mg (0.0025% o.m.f), 0.1mg (0.005% o.m.f), 0.25mg (0.0125% o.m.f), 0.5mg (0.025% o.m.f), 0.6mg (0.03% o.m.f), 0.75mg (0.0375% o.m.f) and 1mg (0.05% o.m.f) respectively, and the mixture is put into a dyeing cup, and the dyeing machine is heated to 130 ℃ for 60min, so that dyeing and finishing the whitening treatment is finished, and then the wax solution remained on the polyester is washed, and the polyester solution is dried.
Whiteness of the whitened polyester cloth was measured using WI (CIE) standard, and whitening uniformity of the whitened polyester cloth was observed under uv lamp irradiation, and the data are shown in table 2.
TABLE 2 whitening effect of different amounts of fluorescent whitening agent OB-1
| OB-1 usage (% o.m.f) | Whiteness degree | Whether or not the fluorescence effect is uniform | Whether or not to present natural color |
| 0.00125 | 81.6 | Is that | Whether or not |
| 0.0025 | 87.2 | Is that | Whether or not |
| 0.005 | 92.1 | Is that | Whether or not |
| 0.0125 | 95.3 | Is that | Whether or not |
| 0.025 | 108.8 | Is that | Whether or not |
| 0.03 | 106.8 | Whether or not | Is that |
| 0.0375 | 107.1 | Whether or not | Is that |
| 0.04375 | 106.2 | Whether or not | Is that |
| 0.05 | 105.1 | Whether or not | Is that |
As can be seen from Table 2, the whiteness is optimal when the amount of the fluorescent whitening agent OB-1 is 0.025% o.m.f, and the fluorescent effect is uniform and does not appear to be natural. Above this amount, the whiteness decreases, and the fluorescence effect is uneven and the natural color appears.
Example III
Dyeing and whitening 2g of polyester cloth with 50mL of treatment liquid (namely bath ratio 25:1) containing 50% water and 0.5mg (namely 0.025% o.m.f) of fluorescent whitening agent OB-1 by mass, and preserving the temperature at 130 ℃ for 0-120 min;
mixing 10mg of fluorescent whitening agent OB-1 raw powder and 1L of liquid wax solution, and uniformly stirring to complete the preparation of whitening treatment liquid;
2g of polyester cloth and 50mL of the prepared whitening treatment liquid (bath ratio is 25:1, the mass of the fluorescent whitening agent OB-1 is 0.5mg, namely 0.025% o.m.f) are put into a dyeing cup, and the dyeing and the whitening treatment is finished after the dyeing cup is heated to 130 ℃ in a dyeing machine and then is respectively kept for 0-120 min. And then washing the whitened polyester, removing the liquid wax solution remained on the polyester, and drying.
Whiteness of the whitened polyester cloth was measured using WI (CIE) standard, whitening uniformity of the whitened polyester cloth was observed under uv lamp irradiation, and whether the whitened Bai Diguan cloth exhibited a fluorescent whitening agent (green) was observed under sunlight, and the data are shown in table 3.
TABLE 3 whitening effect at different incubation times
| Time to keep warm (min) | Whiteness degree | Whether or not the fluorescence effect is uniform | Whether or not to present natural color |
| 0 | 94.1 | Is that | Whether or not |
| 10 | 97.2 | Is that | Whether or not |
| 20 | 101.6 | Is that | Whether or not |
| 30 | 100.9 | Is that | Whether or not |
| 40 | 106.8 | Is that | Whether or not |
| 50 | 106.5 | Is that | Whether or not |
| 60 | 108.8 | Is that | Whether or not |
| 90 | 107.2 | Is that | Whether or not |
| 120 | 107.1 | Is that | Whether or not |
As can be seen from Table 3, the whiteness is optimal for the incubation time of 60min, and the fluorescence effect is uniform and does not appear natural.
Example IV
For 2g of terylene cloth, dyeing and whitening treatment is carried out by using 50mL of treatment liquid (namely bath ratio of 25:1) containing 0.5mg (namely 0.025% o.m.f) of fluorescent whitening agent OB-1 and water content of 50% to 90% at 130 ℃ for 60 min.
Mixing 25mg of fluorescent whitening agent OB-1 raw powder and 250mL of liquid wax solution, and uniformly stirring to complete the preparation of 100mg/L whitening treatment liquid. 5mL of the whitening treatment liquid with the concentration of 100mg/L is taken, the corresponding water and the liquid wax are respectively added according to the dosage of the table 4, and 50mL of the whitening treatment liquid with the water content of 0% to 90% is prepared after stirring.
TABLE 4 preparation of whitening liquid with different water contents
2g of polyester cloth and 50mL of the prepared whitening treatment liquid with different water contents (bath ratio is 25:1, the mass of the fluorescent whitening agent OB-1 is 0.5mg, namely 0.025% o.m.f) are respectively put into a dyeing cup, and the dyeing and whitening treatment is finished after the dyeing cup is heated to 130 ℃ in a dyeing machine and then is preserved for 60 minutes. And then washing the whitened polyester, removing the liquid wax solution remained on the polyester, and drying.
Whiteness of the whitened polyester cloth was measured using WI (CIE) standard, whitening uniformity of the whitened polyester cloth was observed under uv lamp irradiation, and whether the whitened Bai Diguan cloth exhibited a fluorescent whitening agent (green) was observed under sunlight, and the data are shown in table 5.
TABLE 5 whitening effect at different moisture contents
| Moisture content (%) | Whiteness degree | Whether or not the fluorescence effect is uniform | Whether or not to present natural color |
| 50 | 108.8 | Is that | Whether or not |
| 60 | 110.2 | Is that | Whether or not |
| 70 | 114.3 | Is that | Whether or not |
| 80 | 122.6 | Is that | Whether or not |
| 90 | 118.3 | Whether or not | Whether or not |
As can be seen from Table 5, the whiteness with 80% water content was optimal, and the fluorescence effect was uniform and did not appear to be natural. The water content exceeds 80%, the whiteness is reduced, and the fluorescence effect is uneven.
Example five
For 2g of polyester cloth, the dyeing and whitening treatment is carried out by using 30mL to 200mL of treatment liquid (namely bath ratio is 15:1 to 100:1) containing 0.5mg (namely 0.025% o.m.f) of fluorescent whitening agent OB-1 and having water content of 80%, and the temperature is kept at 130 ℃ for 60 min.
Mixing 25mg of fluorescent whitening agent OB-1 raw powder and 250mL of liquid wax solution, and uniformly stirring to complete the preparation of 100mg/L whitening treatment liquid. 5mL of 100mg/L whitening treatment liquid is taken, the corresponding water and liquid wax dosage are respectively added according to the table 6, and the whitening treatment liquid with 80% water content and different bath ratios is prepared after stirring.
TABLE 6 preparation of whitening liquid with different bath ratios
2g of polyester cloth and the prepared whitening treatment liquid (containing 0.5mg of fluorescent whitening agent OB-1, namely 0.025% o.m.f) with different bath ratios are respectively put into a dyeing cup, and are heated to 130 ℃ in a dyeing machine and then are kept for 60 minutes, so that dyeing and whitening treatment is finished. And then washing the whitened polyester, removing the liquid wax solution remained on the polyester, and drying.
Whiteness of the whitened polyester cloth was measured using WI (CIE) standard, whitening uniformity of the whitened polyester cloth was observed under uv lamp irradiation, and whether the whitened Bai Diguan cloth exhibited a fluorescent whitening agent (green) was observed under sunlight, and the data are shown in table 7.
TABLE 7 whitening effect of whitening solutions of different bath ratios
| Bath ratio | Whiteness degree | Whether or not the fluorescence effect is uniform | Whether or not to present natural color |
| 15:1 | 120.2 | Whether or not | Whether or not |
| 20:1 | 123.3 | Is that | Whether or not |
| 25:1 | 122.6 | Is that | Whether or not |
| 50:1 | 122.3 | Is that | Whether or not |
| 70:1 | 122.2 | Is that | Whether or not |
| 100:1 | 122.1 | Is that | Whether or not |
As can be seen from table 7, the bath ratio of 20:1 was optimal, and the fluorescence effect was uniform and did not appear to be natural. Below this value the whiteness decreases and fluorescent whitening non-uniformity occurs.
Example six
Respectively carrying out dyeing and whitening treatment on 2g of nylon cloth, polyester cloth, spandex cloth, aramid cloth and acetate fiber cloth by using 50mL of treatment solution (namely bath ratio 25:1) containing 0.5mg (namely 0.025% o.m.f) of fluorescent whitening agent OB-1 and having water content of 80%, and carrying out heat preservation at 130 ℃ for 60 min.
Mixing 10mg of fluorescent whitening agent OB-1 raw powder and 1L of liquid wax solution, and uniformly stirring to complete the preparation of the whitening treatment liquid.
The chemical fiber sample and 50mL of the prepared whitening treatment liquid (bath ratio is 25:1, containing 0.5mg of fluorescent whitening agent OB-1, namely 0.025% o.m.f) are respectively placed into a dyeing cup, and the dyeing and whitening treatment is completed after the temperature is raised to 130 ℃ in a dyeing machine and then the temperature is kept for 60 minutes. The dyed sample was then washed to remove the remaining liquid wax solution and dried.
Whiteness of the whitening cloth was measured using WI (CIE) standard, and the whitening uniformity of the above-mentioned whitening sample was observed under irradiation of ultraviolet lamp, and whether the whitening sample exhibited the natural color (green) of fluorescent whitening agent was observed under sunlight, and the data are shown in table 8.
TABLE 8 whitening effect of different chemical fibers
As can be seen from table 8, the whitening effect of the polyester cloth in the whitened sample is optimal, and the fluorescent effect is uniform and does not exhibit a natural color.
The invention prepares the whitening treatment liquid composed of the fluorescent whitening agent raw powder, water and liquid wax, so that the fluorescent whitening agent raw powder can be dissolved in the liquid wax and transferred into the chemical fiber under the high-temperature and high-pressure impregnation condition after the chemical fiber is placed in the whitening treatment liquid, thereby realizing the excellent effect of the fluorescent whitening agent raw powder for whitening the chemical fiber, and meanwhile, the liquid wax solvent is easy to be environment-friendly, easy to recycle and free from polluting the environment.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A method for dyeing and finishing a whitening chemical fiber by using a fluorescent whitening agent raw powder, which is characterized by comprising the following steps:
uniformly mixing the fluorescent whitening agent raw powder, water and liquid wax to obtain whitening treatment liquid;
placing the chemical fiber into a whitening treatment liquid, and performing whitening treatment at a target temperature to obtain the whitened chemical fiber;
and cleaning and drying the whitened chemical fiber.
2. The method for dyeing and finishing a whitening chemical fiber with a fluorescent whitening agent raw powder according to claim 1, wherein the fluorescent whitening agent raw powder is benzoxazole fluorescent whitening agent raw powder.
3. The method of dyeing and finishing a whitening chemical fiber with a fluorescent whitening agent raw powder according to claim 2, wherein the fluorescent whitening agent raw powder is one or more of a fluorescent whitening agent raw powder OB-1, a fluorescent whitening agent raw powder OB-2 and a fluorescent whitening agent raw powder OB-3.
4. The method for dyeing and finishing the brightening chemical fiber by using the fluorescent whitening agent raw powder according to claim 1, wherein the consumption of the fluorescent whitening agent raw powder is 0.00125% -0.05% of the mass of the chemical fiber.
5. The method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder according to claim 1, wherein the volume ratio of the water content of the brightening treatment fluid is 50% -90%.
6. The method of dyeing and finishing a whitening chemical fiber with a fluorescent whitening agent raw powder according to claim 1, wherein the chemical fiber is one or more of nylon, terylene, spandex, aramid and acetate fiber.
7. The method for dyeing and finishing a whitening chemical fiber with a fluorescent whitening agent raw powder according to claim 1, wherein the target temperature is 90-140 ℃.
8. The method for dyeing and finishing the brightening chemical fiber by using the fluorescent brightening agent raw powder according to claim 1, wherein the brightening treatment is carried out on the chemical fiber for 0-120min at a target temperature.
9. The method for dyeing and finishing and whitening chemical fibers by using the fluorescent whitening agent raw powder according to claim 1, wherein the bath ratio of the chemical fiber whitening treatment liquid is (15-100): 1.
10. A chemical fiber prepared by the method of dyeing and whitening a chemical fiber with a raw fluorescent whitening agent powder according to any one of claims 1 to 9.
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| CN202310042855.XA CN116219731A (en) | 2023-01-28 | 2023-01-28 | Method for dyeing and finishing and whitening chemical fiber by using chemical fiber and fluorescent whitening agent raw powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310042855.XA CN116219731A (en) | 2023-01-28 | 2023-01-28 | Method for dyeing and finishing and whitening chemical fiber by using chemical fiber and fluorescent whitening agent raw powder |
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| CN116219731A true CN116219731A (en) | 2023-06-06 |
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