PLA/cotton/PTT core-spun yarn knit fabric dyeing at low temperature and one bath - 华强电子网

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22
The probe high frequency needle JT-CT has a needle core that can pass 3 amp high frequency needle
Factory direct 0603 emerald green, 0603 green (0.6 thickness) a lot of low price

PLA/cotton/PTT core-spun yarn knit fabric dyeing at low temperature and one bath

Key words: ultraviolet spectrophotometer; US instrumentation ; UV-1100; UV-1200

Src="http://i.bosscdn.com/blog/nophoto.gif" /></p> To solve the processing cost of the PLA/cotton/PTT3 component core-spun knit fabric dyed by the two-bath process The problem of long-term and low production efficiency was studied. The energy-saving and environmentally friendly low-temperature one-bath dyeing process of PLA/cotton/PTT3 core-spun yarn knit fabric was studied. Because PLA is not alkali-resistant, for the protection of its component properties, the Argazol N series reactive dyes are used to fix the cotton components under neutral conditions. At the same time, the medium-temperature disperse dyes which are relatively lightly stained with cotton components are selected. PLA and PTT components are dyed; 2.5g/L diffusing agent NNO is added to the dyeing prescription to achieve a good anti-staining effect. By studying the fixing temperature of ArgazolN dye and the use of environmentally friendly carrier CWP-910, the PLA/cotton/PTT3 component core-spun knit fabric can be dyed at a low temperature of 90 °C. Studies have shown that the dyeing process is kept for 30 minutes, which can ensure a high dye uptake rate, and the PLA and PTT components have good homochromaticity. Polylactic acid fiber (PLA) is a kind of lactic acid obtained by fermenting corn starch, also known as corn fiber. Polylactic acid fiber has excellent performance and biodegradability. After being discarded, it can be completely decomposed into CO and HO in nature without polluting the environment. At present, the main problem faced by corn fiber dyeing and finishing is that it is not resistant to moisture, heat and alkali. The simultaneous action of the three will lead to accelerated fiber degradation and severely affect the strength; therefore, the wet treatment time for corn fiber is short and the temperature should not be too high. The treatment solution should be as alkaline as possible. PTT is a new type of polyester product with excellent properties. In the field of chemical fiber applications, PTT fiber combines the softness of nylon, the bulkiness of acrylic fiber, the anti-staining property of polyester, and the inherent elasticity of PTT, which combines the excellent properties of each fiber into the current international One of the new hot polymer materials newly developed. PLA/cotton PTT core-spun yarn has the advantages of corn fiber, cotton and PTT fiber, which makes the corn fiber's skin-friendly, moisture-permeable and shape-stable stability fully utilized, and the cotton fiber component improves the moisture regain. , hygroscopicity, wearing comfort, the elastic memory function of the core yarn PTT makes the post-maintenance problem of corn fiber can be solved, the operation becomes simple and quick, and the effect is achieved at a glance, which is very popular among consumers. Because PLA and PTT fibers are dyed with disperse dyes, and cotton fibers can be dyed with reactive dyes, PLA/cotton/PrT3 core-spun yarn fabrics are usually dyed by two-bath method. The PLA and PTT3 components are first dyed with disperse dyes. The reactive dyes are dyed by cotton, dyed and separated by bath, and the color light is easy to control; however, the whole wet processing takes a long time, the production efficiency is low, the PLA component is treated in moist heat for a long time, and the process of dyeing cotton with reactive dyes needs to add soda ash. Fixing for 30min, the pH value of the dyeing solution will be around 1O after soda ash addition, and the alkaline condition will further hydrolyze the PLA component. In order to simplify the operation, shorten the dyeing time, reduce the energy consumption, and protect the original performance of the fabric, the research based on this paper is based on three principles: 1) shorten the dyeing time as much as possible; 2) avoid alkaline conditions as much as possible; 3) reduce the dyeing temperature as much as possible . In this paper, the PLA/cotton/PTT3 component core-spun fabric dispersion/active low-temperature one-bath dyeing process was studied. 1 test part 1.1 test material PLA / cotton / PTT (33 / 22 / 45) 3 component core yarn knitted fabric semi-products (18.4tex, Jiangsu Donghua Textile Co., Ltd.); pure cotton combed yarn semi-finished products (19.7 tex); pure PTT yarn semi-finished product (18.5 tex); pure PLA yarn semi-finished product (18.5 tex). Reactive dyes (Argazol yellow N-SR, Argazol blue N-SR), pH buffer Argabufer07 (provided by Shanghai Yayun Fine Chemicals); disperse dyes (dispersion blue 2BLN, disperse red 3B, disperse yellow RGFL, disperse blue SE-2R) , Disperse Ruby SE-GFL, Disperse Yellow SE-FL), Carrier CWP-910 (Suzhou Keyin Chemical Co., Ltd.); Diffusion Agent NNO, Yuanming Powder, Acetone, Soap. 1.2 test equipment HHS-4 type constant temperature water bath; FA2004 type electronic balance; 101A type electric blast drying oven; Datacolor600 computer color measuring color meter (American Datacolor company); high temperature oil bath dyeing machine; SW. 12A type wash fastness tester; Y571B type rubbing fastness tester; UV1100 type ultraviolet visible spectrophotometer (MEAS China company); YG026C type electronic fabric strength tester 1.3 test and test method 1.3.1 test Method: Dyeing test of disperse dye on cotton: The cotton yarn was placed in a 1% (O.W.f) disperse dyeing solution with a bath ratio of 1:30, and dyed at 4O°C for 2°C/min. The rate is raised to 110oC, kept for 30 minutes, cooled, washed, soaped, washed, and dried. The amount of carrier CWP-910 was studied: the PLA/cotton/P13 core-spun yarn fabric was placed in a 0.5% (O.W.f) dispersion blue SE-2R dye solution with a bath ratio of 1:30, CWP- The mass concentration of 910 is 0.5, 1, 2, 3, 4, 5g / L, respectively, dyed at 40 ° C, heated to 110 ° C at 2 ° C / min, kept for 30 min, cooled, washed, soaped, Wash and dry. Diffusion agent NNO anti-staining effect test: The cotton yarn was placed in a 1% (O.W.f) dispersion blue SE-2R with a bath ratio of 1:30, and dispersed red jade SE. GFL, scattered yellow SE. In the FL dye solution, the mass concentration of CWP-910 is 0, 0.5, 1, 1.5, 2, 2.5, 3g / L, respectively, dyed at 40 ° C, and the temperature is raised at 2 ° C / min to 110oC, keep warm for 30min, cool down, wash, soap, wash and dry. Fixation temperature study of ArgazolN dye: The cotton yarn was placed in a 0.5% (O.w.f) yagesu navy blue N-SG dye solution with a bath ratio of 1:30. The mass concentration of Yuanming powder was 20g/ L, Argabufer07 mass concentration of 2g / L, human dyeing at 4O ° C, at 2 ° C / min rate to 85,90,95,100,105,1l0 ° C, holding for 30min, cooling, washing, soaping, washing, Dry. Low temperature dyeing temperature study of disperse dyes: PLA and PTT yarns were placed in 1% (O.w.f) dispersion yellow SE-FL dye solution with a bath ratio of 1:30. The mass concentration of CWP-910 was 3g/ L (110 °C does not add), human dyeing at 40 ° C, the temperature is raised to 75, 8O, 85, 90, 95, 100, 105, 110oC at 2 ° C / min, heat preservation for 30min, cooling, washing, soaping, washing , dry. Dyeing time study: PLA and PTT yarns with a mass ratio of 33:45 were simultaneously placed in 1% (O.w1.f) Disperse Blue SE-2R dye solution with a bath ratio of 1:30, CWP-910 The mass concentration is 3g/L, dyed at 40°C, heated to 90°C at a rate of 2°C/min, kept for 10, 20, 30, 40, 50, 60min, cooled, washed, soaped, washed, and dried. 1.3.2 Determination of fabric dyeing depth (Is value) Tested with American Datacolor600 computer color measuring instrument, the test condition is D65 light source, including specular reflection, ultraviolet filter rate. 1.3.3 Disperse dye staining test The color difference △ of cotton yarn before and after dyeing was tested by American Datacolor600 computer color measuring instrument as the color difference; the cotton yarn before and after dyeing and the gray sample card for assessing staining (Shanghai City Textile Industry Technology Supervision Institute) compared, to get the stain level. 1.3.4 Test of rubbing fastness Test according to GB/T3920-1997 "Textile fastness test rubbing fastness". 1.3.5 Test of soaping fastness Test according to GB/T3921.3-l997 "Color fastness test of textile color fastness: test 3". 1.3.6 Calculation of the same color balance index K=(K/S)A/(K/S)B where: (K/S)A is the K/S value of PLA; (K/S)B is PTT K/S value. The homochromaticity evaluation of dyes: when K=1, the two fibers of PLA fiber and PTT fiber are of the same color; when K>1, the color of PLA fiber is deeper than that of PTT fiber; when K<1, the color of PLA fiber is lighter than that of PTT fiber. The closer the value of the same color balance index is to 1, the better the homochromaticity. 1.3.7 Determination of Dyeing Rate of Disperse Dyes 1 mL of each dye solution before and after dyeing was transferred to a 10 mL volumetric flask, acetone was added to the mark, and the UV1100 UV-Vis spectrophotometer was used to measure at the maximum absorption wavelength (λmax). Dyeing liquid density Al, A2. Percentage of dyeing = (1 - A2V2 / A1V1) × 100% where: A1 is the optical density of the dyeing solution before dyeing; A1 is the optical density of the dyeing solution after dyeing; V1 is the volume of the dyeing solution before dyeing; V2 is the dyeing solution The volume of the dye solution. 1.3.8 Determination of tensile strength of fabrics According to GB/T3923.1-1997 "Stretching properties of textile fabrics Part 1: Determination of breaking strength and elongation at break", in the strength test of YG026C electronic fabric Tested on the instrument. 2 Results and analysis 2.1 Selection of dyes 2.1.1 Reactive dyes According to the literature [4-5], PLA fibers are not resistant to alkali, and too strong acidity will cause strong damage, but generally reactive dyes are dyed in the process. All need to add alkali agent to fix the color, under alkaline conditions will accelerate the degradation of PLA components, affecting the style of the dyed fabric. In order to solve this problem, ArgazolN series reactive dyes are selected, which are reactive dyes containing novel picolinic acid reactive groups. Without neutral fixing, the reactive groups can react with cellulose fibers under neutral conditions. . There is no alkaline substance in the dyeing liquid, which can greatly reduce the sewage treatment and improve the protection of the environment. 2.1.2 Disperse Dyes PTT is a dye-prone fiber that can be dyed with disperse dyes of different warm types and can be dyed at a temperature of 115 ° C comparable to or better than PET fibers [61]. PLA fiber is a kind of polyester fiber, which belongs to hydrophobic fiber, has a glass transition temperature of 57 ° C, a melting point of 175 ° C, is not resistant to high temperature, and the dyeing temperature should be selected from 100 to 110 ° C. Under these conditions, the fiber strength loss is small, and the dyeing depth is ideal. However, after dyeing with general disperse dyes, a large amount of dye is lost during reduction washing and soaping. Therefore, medium-low temperature disperse dyes and fast disperse dyes should be used. Studies have shown that PLA uses S-type disperse dyes to obtain light color, and E-type and SE-type disperse dyes can be used to dye deep color in ll0 °C. Considering the disperse dyes to simultaneously dye PLA and PTT, it is more suitable to select medium-low temperature disperse dyes. Low-temperature disperse dyes, three primary color disperse blue 2BLN, disperse red 3B, disperse yellow RGFL and medium-temperature disperse dyes, three primary color dispersion blue SE-2R, disperse ruby ​​SE-GFL, and disperse yellow SE-FL were selected as research objects, and two types of disperse dyes were investigated. The staining performance of the cotton component. Carrier CWP. 910 has obvious effect on the deepening of dyeing, and the maximum staining depth is reached at 3g/L, and the K/S value reaches 1.8224. During the dyeing process, the carrier CWP-910 has a plasticizing effect on the PLA and PTT fibers, which reduces the glass transition temperature of the fibers, weakens the attraction between the molecular chains of PLA and PTT fibers, and causes the fibers to form larger voids, thereby making the dyes It is easy to enter the inside of the fiber; at the same time, the carrier CWP-910 has a strong dissolving ability for the dye, which increases the concentration of the dye on the surface of the fiber, improves the concentration difference of the dye inside and outside the fiber, and accelerates the diffusion of the dye. When the mass concentration is greater than 3g/L, the K/S value tends to decrease. The reason may be that after the carrier CWP-910 reaches a certain concentration, the force of the carrier micelle overcomes the force between the auxiliary agent and the fiber. It leads to the association and agglomeration between the carrier micelles, forms a new phase, and adsorbs some dyes in the coagulation aid, and the concentration of the dye in the dye liquor is reduced, thus causing the K/S value to start to decrease. Since the mass concentration of the additive reached the maximum dyeing depth at 3 g/L, it was determined that the optimum mass concentration of the additive CWP-910 was about 3 g/L. 2.2.2 Diffuser NNO The selected three primary colors of medium-temperature disperse dyes are lighter than the low-temperature disperse dyes, but the color difference is still large. In the dyeing process, the anti-staining ability additive should be further used. Reduce the degree of staining of the disperse dye. A certain amount of diffusing agent NNO was added during the dyeing process. The relationship between the amount of NNO of the diffusing agent and the color difference of the three primary colors of the medium-temperature disperse dye is shown in Fig. 2. It can be seen from Table 2 that the difference in color depth after dyeing at different temperatures is not significant; as the fixing temperature decreases, the color fastness decreases, and when the fixing temperature is less than 90 ° C, the color fastness The index reaches an unacceptable level. It can be seen that the lower the temperature, the worse the fixing effect, and more and more dyes will stay on the fiber surface, affecting the color fastness. The fixing temperature of the Argazol N dye should not be lower than 90 °C. 2.3.2 Study on the low temperature dyeing temperature of disperse dyes The carrier CWP was investigated by the conventional dyeing depth of 110°CPLA and PTT fabrics. The degree to which the dyeing temperature of each dye can be lowered after the addition of 910. The dyeing depth of PLA after dyeing was not high in PTT. The depth of PTT staining became deeper and deeper with the incubation time. The staining depth of PLA reached the maximum at 30min and decreased after 30min. As the holding time increases, the same color balance index K becomes lower and lower, and the value drops sharply after 30 minutes. The reason is that the dyeing time is about 30 minutes (the dyeing time is about 55 minutes), the dyeing is basically balanced, and the dyeing rate is not increased much after that (see Figure 3). At this time, if the holding time is extended, there is no excessive dye in the dyeing solution and the fiber is dyed. Since the affinity of PTT to the disperse dye is stronger than that of PLA, the dyed dye on the PLA will be transferred to the PTT component. After 30 minutes of incubation, the K value dropped sharply. From the point of view of homochromaticity, the shorter the holding time, the better the homochromaticity, but from the point of view of the dyeing rate, the longer the dyeing time, the higher the dyeing rate and the more sufficient the dye utilization. After research, the other two disperse dyes have the same pattern. The two factors of homochromaticity and dye uptake were combined, and the dyeing incubation time was determined to be 30 min. 2.5 Low-temperature one-bath method compared with the traditional two-bath method Take the light green swatch of the PLA/cotton/PTT3 component core-spun yarn knitted fabric as an example. 2.5.1 Traditional two-bath method 1) Pre-dyed PLA and PTT components Process prescription: Disperse yellow SE-F0.47% (O.W.f); Disperse blue SE-2R0.42% (O.W. f); diffusing agent NNO2g / L; using HAc to adjust the pH to 4-5; bath ratio is 1:30. 2.5.2 low temperature one bath method staining prescription: Argazol yellow N. SR0.12% (O.W.f); Argazol Blue N-SR0.1% (O.W.f); Disperse yellow SE-F0.47% (O.W.f); Disperse blue SE-2R0. 42% (O.W.f); buffer Argabuffer 072g / L; Yuanming powder 10g / L; carrier CWP-9103g / L; diffusing agent NNO2.5g / L; bath ratio of 1:30. Keywords: ultraviolet spectrophotometer; US instrumentation ; UV-1100; UV-1200</p></dl><!--centered, 52 pixels wide, 1 height, horizontal dividing line-- ><hr width="100%" size="1" color="#4a85a4" /> </div> </div> <div class="tech-detail-share"> <!-- Baidu Button BEGIN - -> <div class="bdsharebuttonbox"> <a href="#" class="bds_qzone" data-cmd="qzone" title="Share to QQ space"></a> <a href="#" class ="bds_tsina" data-cmd="tsina" title="Share to Sina Weibo"></a> <a href="#" class="bds_weixin" data-cmd="weixin" title="Share to WeChat "></a> <span>Share to:</span> </div> <script>window._bd_share_config = { "common": { "bdSnsKey": {}, "bdText": "", "bdMini" : "1", "bdMiniList": false, "bdPic": "", "bdStyle": "2", "bdSize": "16" }, "share": {} }; with (doc Ument) 0[(getElementsByTagName(

Previous:As part of asphalt fatigue testing machine equipment? -Huaqiang Electronic Network

Next: UV-1100 spectrophotometric method for rapid measurement of peroxide content of oxides in edible oils - Master's thesis - Dissertation

Related Reading

  • • [New product broadcast] 1N212 2016-08-10 14:18
  • • [New product broadcast] 1N203 2016-08-10 14:18
  • • [New product broadcast] 1N202 2016-08-10 14:18
  • • [New product broadcast] 1N194A 2016-08-10 14:18
  • • [New product broadcast] 1N78C 2016-08-10 14:18
  • • [New product broadcast] 1N76C 2016-08-10 14:18
  • • [New product broadcast] 1N58A 2016-08-10 14:18
  • • [New product broadcast] 1N56A 2016-08-10 14:18

Commutators For Industrial Motors

Commutators For Industrial Motors,Commutator For Fan Motors,Commutator For Switching Motors,Commutator For Auto

ZHEJIANG JIAGU ELECTRIC APPLIANCES CO. LTD , https://www.chinajiagu.com

This entry was posted in on