CN116463843A - Low-temperature short-process pretreatment process for hemp fabrics - Google Patents
Low-temperature short-process pretreatment process for hemp fabrics Download PDFInfo
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- 239000004744 fabric Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000011487 hemp Substances 0.000 title claims abstract description 50
- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 42
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 title claims abstract description 42
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 title claims abstract description 42
- 235000009120 camo Nutrition 0.000 title claims abstract description 42
- 235000005607 chanvre indien Nutrition 0.000 title claims abstract description 42
- 230000008569 process Effects 0.000 title claims abstract description 40
- 238000005406 washing Methods 0.000 claims abstract description 48
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000012224 working solution Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- 239000012190 activator Substances 0.000 claims abstract description 8
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 238000004061 bleaching Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 15
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000460 chlorine Substances 0.000 abstract description 9
- 229910052801 chlorine Inorganic materials 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 238000010025 steaming Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 20
- 238000004043 dyeing Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 9
- 238000009990 desizing Methods 0.000 description 8
- 239000004753 textile Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000010409 ironing Methods 0.000 description 6
- 102000004190 Enzymes Human genes 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010186 staining Methods 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
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- 238000004821 distillation Methods 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000036561 sun exposure Effects 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- SGHZXLIDFTYFHQ-UHFFFAOYSA-L Brilliant Blue Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 SGHZXLIDFTYFHQ-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 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
- 238000009874 alkali refining Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005517 mercerization Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021655 trace metal ion Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to the technical field of fabric pretreatment, in particular to a low-temperature short-flow pretreatment process for a China-hemp fabric, which comprises the following steps of padding working solution, stacking, washing and drying the China-hemp fabric in sequence; the stacking temperature is less than or equal to 50 ℃, and the working solution is prepared according to the following concentration components: 14-16 g/L hydrogen peroxide, 24-26 g/L caustic soda, 30-32 g/L activator and 4-6 g/L stabilizer. The hemp fabric pretreatment process provided by the invention has the advantages of low energy consumption and short flow, and can achieve the pretreatment effects of conventional high-temperature alkali steaming, chlorine bleaching and oxygen bleaching.
Description
Technical Field
The invention relates to the technical field of fabric pretreatment, in particular to a low-temperature short-flow pretreatment process for a China-hemp fabric.
Background
In recent years, as the living standard is continuously improved, the requirements of people on clothes are more and more strict. The hemp fiber has more capillary channels, can rapidly transfer and diffuse moisture, and has natural sterilization and disinfection effects due to the special porous structure and strong adsorption capacity. The molecular structure of the China hemp fiber is loose, the cross section of the China hemp fiber is irregular triangle, quadrangle, hexagon, oblate circle, polygon and the like, the shape of the middle cavity is different from the shape of the outer cross section, when the ultraviolet rays irradiate the China hemp fiber, diffuse reflection and multi-layer refraction can be formed, and the ultraviolet-proof China hemp fiber has an ultraviolet-proof function. Therefore, the hemp fiber is a good raw material for textile and clothing, and meets the health consumption concept of green and environment-friendly fabrics and the market demand of functional fabrics.
At present, the pretreatment of China-hemp fabrics is generally performed by high-temperature scouring, in order to remove hemp skin and improve whiteness, a chlorine bleaching process is generally added, and then the hemp fabrics are treated by an oxygen bleaching process to obtain semi-finished products.
CN103132337a discloses a short-flow treatment method for a hemp fabric, which adopts a high-efficiency composite biological enzyme cold-stacking pretreatment process, a chlor-alkali-oxygen one-bath pretreatment process and a wet cloth half-mercerization process of the hemp fabric to treat the hemp fabric, although the pretreatment effect is improved, the cold-stacking process needs to use the composite biological enzyme, the treatment cost is increased and the stacking time is longer.
CN113882159a discloses a pretreatment process for high-comfort hemp fabrics, which adopts a one-step method of steam explosion scouring and bleaching, bleaching and mercerizing, and improves the problem of coarse hand feeling of the hemp fabrics, but has complex operation and higher treatment temperature and energy consumption.
In summary, how to provide a low-temperature short-process pretreatment process for hemp fabrics is a current urgent problem to be solved.
Disclosure of Invention
Aiming at the problems of high pretreatment temperature, long time and high energy consumption in the prior art, the invention provides a low-temperature short-flow pretreatment process for a hemp fabric, which has the advantages of low energy consumption and short flow and can achieve the pretreatment effects of conventional high-temperature alkali steaming, chlorine bleaching and oxygen bleaching.
The invention provides a low-temperature short-flow pretreatment process for China-hemp fabrics, which comprises the following steps of padding working solution, stacking, washing and drying the China-hemp fabrics in sequence; the stacking temperature is less than or equal to 50 ℃, and the working solution is prepared according to the following concentration components: 14-16 g/L hydrogen peroxide, 24-26 g/L caustic soda, 30-32 g/L activator and 4-6 g/L stabilizer.
Further, the hemp fabric is a pure-spun hemp fabric.
Further, the padding working fluid step is performed in a padding tank, the stacking step is performed in a steam box, the water washing step is performed in a water washing tank, and the drying step is performed in a drying chamber.
Further, the fabric liquid carrying amount in the padding working liquid step is 100%.
Further, the washing tank comprises at least two grids, the first grid of the washing tank contains hot water at 95 ℃, the water temperatures in other grids of the washing tank are sequentially reduced according to washing, and the bottom end of the first grid of the washing tank is communicated with a heat exchange assembly arranged on the bottom surface of the steam box through a pipeline.
Furthermore, the padding working fluid step adopts an air-pressure diaphragm type horizontal strong padder.
further,theactivatorcomprisesthewarfarinLYM-AandthewarfarinLYM-B,andtheweightratioofthewarfarinLYM-AtothewarfarinLYM-Bis1.5-1.7:1. The activator contains the compound of the enzyme-like metal complex catalyst and the amide activator, can activate hydrogen peroxide at low temperature, and the generated bleaching active substance can quickly destroy chromophoric groups and can effectively remove cotton seed hulls. The activating effect of the activator is optimal when the activator is contained in the above weight proportion.
Further, the stabilizer is Huaming element LYM-C. Mainly uses a stabilizer to chelate metal ions to stabilize the decomposition rate of hydrogen peroxide.
Further, the stacking time is 60-90 min.
The invention has the beneficial effects that:
(1) The working solution contains the activating agent in the low-temperature short-flow pretreatment process of the China hemp fabric, the activating agent can activate hydrogen peroxide at low temperature, reaction heat is instantaneously released when the working solution is prepared, the surface temperature of the fabric is increased after the fabric is padded with the working solution, meanwhile, the invention can realize the required 50 ℃ environment by means of hot water which flows back to the steam box through the water washing tank, realize the pretreatment flows of alkali refining, desizing, bleaching and the like, and save energy consumption and have short flow without additional steam;
(2) According to the low-temperature short-flow pretreatment process for the hemp fabric, disclosed by the invention, the color-forming groups are quickly destroyed by using bleaching active substances generated by activated hydrogen peroxide, so that cotton seed hulls can be effectively removed, and the effect of bleaching is achieved;
(3) According to the low-temperature short-flow pretreatment process for the hemp fabric, disclosed by the invention, the activator is matched with caustic soda and hydrogen peroxide for use, so that the fabric obtains a certain wool effect in the padding process, and the desizing effect in pretreatment is improved;
(4) theChinahempfabriclow-temperatureshort-flowpretreatmentprocessprovidedbytheinventionhastheadvantagesthattheactivatoroftheChina-Ming-inLYM-Aalsohasadesizingeffect,theChina-Ming-inLYM-Balsohasalow-temperaturerefiningeffect,andthealkalirefininganddesizingeffectscanbeenhancedinthestackingprocess;
(5) The working solution of the low-temperature short-flow pretreatment process for the hemp fabric provided by the invention contains the stabilizer, so that trace metal ions such as iron, copper and the like in the working solution can be chelated, the effect of stabilizing the decomposition rate of hydrogen peroxide is achieved, and the effect of pretreatment of the fabric surface is prevented from being influenced by too fast reaction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a flow chart of a pretreatment process in example 1 of the embodiment of the present application.
In the figure, a 1-padding tank, a 2-steaming tank, a 3-washing tank, a 31-washing tank first grid, a 32-washing tank second grid, a 33-washing tank third grid, a 4-drying chamber, a 5-heat exchange component, a 6-pump and 7-pipelines are arranged.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
thefollowingHuamingessenceLYM-A,HuamingessenceLYM-BandHuamingessenceLYM-Careallavailablefromthesamecompany.
Example 1
As shown in fig. 1, the pretreatment process device of the embodiment comprises a padding tank 1, a steam box 2, a water washing tank 3, a drying chamber 4, a heat exchange component 5, a pump 6 and a pipeline 7; wherein: the washing tank 3 includes a first compartment 31, a second compartment 32, and a third compartment 33. The heat exchange assembly 5 is preferably an S-shaped radiating pipe and is arranged on the inner bottom surface of the steam box 2, the bottom end of the first grid 31 of the water washing tank is communicated with the heat exchange assembly 5 through a pipeline 7, and a pump 6 is arranged on the pipeline 7. In this embodiment, the 95 ℃ hot water in the first grid 31 of the washing tank is returned to the heat exchange assembly 5 in the steam box 2 through the pump 6, so as to provide a heat source for the steam box 2.
A low-temperature short-process pretreatment process for hemp fabrics comprises the following steps:
the pure spinning hemp fabric (specification L14x 50x 56) is padded with working fluid in padding tank 1, piled up for 60min at 50 ℃ in steam box 2, washed with hot water at 95 ℃ in first grid 31 of washing tank, washed with warm water in second grid 32 of washing tank, washed with cold water in third grid 33 of washing tank, and dried in drying chamber 4.
The working fluid used in this example was prepared from the following components in concentration: 26g/L of caustic soda, 15g/L of hydrogen peroxide, 19.6g/L of Huaming essence LYM-A, 12g/L of Huaming essence LYM-B and 4.8g/L of Huaming essence LYM-C.
The dyeing process adopted in this example comprises the following steps: padding dye liquor, drying, padding vapor, solid-liquid, steaming, hot water washing, water washing and drying.
The dye liquor used in this example was formulated as follows: 12.2g/L of active Brilliant blue SRE, 3.6g/L of active bright yellow SGE and 4.2g/L of active turtleya SGE.
Comparative example 1
Padding pure-spinning China-hemp fabrics (with the specification of L14x 50x 56) with an alkaline steaming working solution, stacking at 102 ℃, washing with water, padding the bleaching solution, stacking at normal temperature, washing with water, padding with an oxygen bleaching working solution, stacking at 98 ℃, washing with water, and drying.
The alkaline distillation working solution adopted in the comparative example is prepared according to the following concentration components: 50g/L caustic soda, 5 3g/L refining agent HF-JL, 1.5g/L chelating dispersant A02 and 2.2g/L wax remover HF-JL 4.
The bleaching solution used in this comparative example was formulated as follows: sodium hypochlorite 5.5g/L.
The oxygen bleaching working solution adopted in the comparative example is prepared according to the following concentration components: 3.5g/L hydrogen peroxide, 3g/L hydrogen peroxide stabilizer W03, 4.5g/L chelating agent A02, 2g/L sodium hexametaphosphate and 2.2 g/L188 enzyme.
The dyeing process used in this comparative example was the same as in example 1.
Example 2
A low-temperature short-process pretreatment process for hemp fabrics comprises the following steps:
padding pure-spun hemp fabrics (with the specification of L15x 54x 52) in a padding tank with working solution, stacking for 90min at 50 ℃ in a steam box, respectively adopting hot water washing at 95 ℃ in a washing tank, warm water washing, cold water washing and drying in a drying chamber.
The working fluid used in this example was prepared from the following components in concentration: 24g/L of caustic soda, 14g/L of hydrogen peroxide, 18.7g/L of Huaming essence LYM-A, 11.3g/L of Huaming essence LYM-B and 5.5g/L of Huaming essence LYM-C.
The dyeing process adopted in this example comprises the following steps: padding dye liquor, drying, padding vapor solid-liquid, steaming, washing with water, soaping, washing with water and drying.
The dye liquor used in this example was formulated as follows: sea orchid WNE 37.5g/L, yellow SHE 12.5g/L.
Comparative example 2
Padding pure-spinning China-hemp fabric (with the specification of L15x15 and 54x 52) with an alkaline steaming working solution, stacking at 102 ℃, washing with water, padding the working solution, stacking at normal temperature, washing with water, padding with an oxygen bleaching working solution, stacking at 98 ℃, washing with water, and drying.
The alkaline distillation working solution adopted in the comparative example is prepared according to the following concentration components: 50g/L caustic soda, 5 3g/L refining agent HF-JL, 1.5g/L chelating dispersant A02 and 2.2g/L wax remover HF-JL 4.
The bleaching solution used in this comparative example was formulated as follows: sodium hypochlorite 5.5g/L.
The oxygen bleaching working solution adopted in the comparative example is prepared according to the following concentration components: 3.5g/L hydrogen peroxide, 3g/L hydrogen peroxide stabilizer W03, 4.5g/L chelating agent A02, 2g/L sodium hexametaphosphate and 2.2 g/L188 enzyme.
The dyeing process used in this comparative example was the same as in example 2.
Test method
Test items: the dyeing process comprises the steps of wool effect, desizing grade, dyeing depth, whiteness, dyeing fabric K/S value, dyeing uniformity, soaping fastness, rubbing fastness, ironing fastness, perspiration fastness, chlorine washing fastness, light fastness, perspiration and light combination fastness and the like.
(1) Method for testing wool effect of textile
The test was performed according to fabric wicking height test standard FZ/T01071-2008. The wicking height of the textile, i.e. the height at which the liquid rises along the textile material in a certain time by capillary action, is tested when one end of the vertically suspended textile material is wetted with the liquid. The invention samples and tests two adjacent fabric strips.
(2) Method for testing desizing grade of starch slurry
The test was performed according to fabric starch slurry content test standard HG/T5080-2016. The blue or blue-violet substance is generated by the action of iodine and starch, and an ethanol solution of iodine or a reagent prepared by iodine and potassium iodide (added with acetic acid) is dripped on the fabric to form deep blue, and the fabric is rated according to a desizing color card.
(3) Whiteness, K/S value test method (characterization of depth of color)
The test was performed using a Datacolor color measurement system. Four layers of fabrics are stacked under the condition that the ambient temperature is 20+/-2 ℃ and the relative humidity is 65+/-2%, color measurement is started, when the fabrics are tested, the computer calculates brightness difference (CIE DL), red/green difference (CIE Da), yellow/blue difference (CIE Db), saturation difference (CIE DC), hue difference (CIE DH) and integrated color difference (CIE DE) of a standard sample and a tested sample through CIELAB formulas through the reflectivity of different wavelengths, and the data can be directly read from Datecolor color measurement data.
(4) Method for testing dyeing uniformity
And testing the left, middle and right K/S values of the fabric by using a Datecolor color measurement system, selecting the K/S of the middle position of the fabric as a reference, and comparing the K/S values of the left, middle and right positions of the fabric to determine whether the fabric has the left, middle and right color difference problem.
(5) Soaping fastness testing method
The test was carried out according to the fabric soaping color fastness standard AATCC 61-2A. And simulating a manual, household or commercial washing mode, washing the dyed fabric for a certain time under the conditions of specified temperature, detergent, bleaching, friction and the like, observing the color change of the sample, and evaluating the change of the sample and the staining grade of the lining fabric by using a gray sample card.
(6) Friction fastness testing method
The test was carried out according to the crock fastness standard AATCC 8. The transfer of color to white rubbing cloth can be compared to the gray card or 9-grade color gray to determine the number of dry and wet rubbing fastness levels.
(7) Ironing fastness testing method
The test was carried out according to the ironing fastness standard GB-T6152. Simulating a household iron, heating the iron to a certain temperature (different fabric temperatures), sewing corresponding lining cloth and fabric, looking at ironing discoloration and ironing staining, and judging the grade.
(8) Perspiration fastness testing method
The test was carried out according to perspiration color fastness standard GB-T3922. And (3) combining the textile with the specified lining fabric, immersing the textile in the artificial sweat containing amino acid for 30min, placing the fabric in a test device with certain pressure, drying the fabric in an oven at 38 ℃ for 4 hours, and evaluating the discoloration of the sample and the staining degree of the lining fabric by using a gray sample card after the sample and the lining fabric are dried, thus obtaining the discoloration and staining grade of the perspiration color fastness of the fabric.
(9) Method for testing fastness to chlorine washing
The test was carried out according to the chlorine fastness test standard AATCC 61-4A. An effective chlorine solution of 0.15% is prepared, the fabric is soaked in the solution, and the fabric is placed for 45min at 71 ℃, washed and ironed, and then is compared with the original fabric, and the fabric is rated.
(10) Method for testing light fastness
The test was performed according to AATCC16, the light fastness test standard. The fabrics were rated as received after 20AFU sun exposure under conditions simulating sun exposure.
(11) Perspiration and light combination fastness testing method
The test was performed according to AATCC125, a test standard for perspiration complex fastness. After the fabric is treated by artificial sweat, the fabric is placed under a simulated sun-drying condition, 20AFU is sun-dried under the condition that the water content is 100%, and the fabric is rated according to the degree of fading before and after the fabric.
Evaluation of properties of hemp fabrics after pretreatment:
the test data of examples and comparative examples are shown in table 1, with respect to whiteness test, starch slurry desizing grade test and textile capillary effect test.
Table 1 pretreatment index data of examples and comparative examples
The comparative data for desizing costs for example 1 and comparative example 1 are shown in table 2.
Table 2 comparative data on desizing cost for example 1 and comparative example 1
The test data of examples and comparative examples are shown in table 3, by the soaping fastness test, the rubbing fastness test, the perspiration fastness test, the ironing fastness test, the perspiration-light combination fastness test, the light fastness test and the chlorine washing fastness test.
Table 3 data for the fastness to dyeing test of examples and comparative examples
The test data of examples and comparative examples are shown in table 4 by the dyeing depth test.
Table 4 examples and comparative examples dyeing depth test data
As can be seen from tables 1, 3 and 4, the low-temperature short-process pretreatment process for the hemp fabric provided by the invention has the advantages that on the basis of shortening the process flow and reducing the energy consumption, the pretreatment effect and the dyeing effect can reach the index effects after the conventional alkali steaming, chlorine bleaching and oxygen bleaching pretreatment. As can be seen from the table 2, the low-temperature short-flow pretreatment process for the hemp fabric provided by the invention can reduce the cost by 0.167 yuan/meter.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims.
Claims (9)
1. The low-temperature short-flow pretreatment process for the hemp fabric is characterized by comprising the following steps of padding working solution, stacking, washing and drying the hemp fabric in sequence; the stacking temperature is less than or equal to 50 ℃, and the working solution is prepared according to the following concentration components: 14-16 g/L hydrogen peroxide, 24-26 g/L caustic soda, 30-32 g/L activator and 4-6 g/L stabilizer.
2. The low-temperature short-process pretreatment process for hemp fabrics according to claim 1, wherein the hemp fabrics are pure-spun hemp fabrics.
3. The low-temperature short-process pretreatment process for hemp fabrics according to claim 1, wherein the padding working fluid step is performed in a padding tank, the stacking step is performed in a steam box, the washing step is performed in a washing tank, and the drying step is performed in a drying chamber.
4. A low temperature short flow pretreatment process for hemp fabrics as claimed in claim 1, wherein the fabric liquid amount in the padding working liquid step is 100%.
5. A low-temperature short-process pretreatment process for hemp fabrics according to claim 3, wherein the washing tank comprises at least two grids, the first grid of the washing tank contains hot water at 95 ℃, the water temperatures in the other grids of the washing tank are sequentially reduced according to the washing sequence, and the bottom end of the first grid of the washing tank is communicated with a heat exchange component arranged on the bottom surface of the steam box through a pipeline.
6. The low-temperature short-process pretreatment process for hemp fabrics according to claim 1, wherein the padding working fluid step adopts an air-pressure diaphragm type horizontal strong padder.
7. thelow-temperatureshort-processpretreatmentprocessofhempfabricsaccordingtoclaim1,whereintheactivatorcompriseswarmminLYM-AandwarmminLYM-B,andtheweightratioofthewarmminLYM-AtothewarmminLYM-Bis1.5-1.7:1.
8. The low-temperature short-process pretreatment process for hemp fabrics according to claim 1, wherein the stabilizer is Huaming element LYM-C.
9. The low-temperature short-process pretreatment process for hemp fabrics according to claim 1, wherein the stacking time is 60-90 min.
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