阅读说明：本技术 一种壳低聚糖预处理的精纺毛织物染色工艺 (Chitosan oligosaccharide pretreatment worsted fabric dyeing process ) 是由 陶海燕 丁巧英 温欣婷 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种壳低聚糖预处理的精纺毛织物染色工艺,包括以下步骤：S1：将壳低聚糖、亚硫酸氢钠、润湿剂和酸性pH值调节剂溶于水中,混合均匀制得酸性的壳低聚糖溶液；S2：将面料浸渍于S1所得壳低聚糖溶液中,经浸轧处理,置于低于100℃的条件下烘干；S3：将面料加入25～40℃的酸性染料染液中,保温10～20min,以1.5～2.5℃/min升温至90～95℃,保温反应40～80min。该壳低聚糖预处理的精纺毛织物染色工艺采用亚硫酸氢钠和壳低聚糖预处理精纺毛织物,壳低聚糖和羊毛纤维之间典型吸附,提高羊毛纤维对酸性染料的吸附能力,有助于提高酸性染料的上染率,而且染色后的精纺毛织物手感柔软。(The invention discloses a worsted wool fabric dyeing process with chitosan oligosaccharide pretreatment, which comprises the following steps: s1: dissolving chitooligosaccharide, sodium bisulfite, wetting agent and acidic pH value regulator in water, and mixing to obtain acidic chitooligosaccharide solution; s2: soaking the fabric in the chito-oligosaccharide solution obtained in S1, padding, and drying at the temperature lower than 100 ℃; s3: adding the fabric into an acid dye solution at the temperature of 25-40 ℃, preserving heat for 10-20 min, heating to 90-95 ℃ at the speed of 1.5-2.5 ℃/min, and preserving heat for reaction for 40-80 min. According to the chitosan oligosaccharide pretreated worsted fabric dyeing process, the worsted fabric is pretreated by the sodium bisulfite and the chitosan oligosaccharide, the chitosan oligosaccharide and the wool fiber are typically adsorbed, the adsorption capacity of the wool fiber on acid dye is improved, the acid dye uptake is improved, and the dyed worsted fabric is soft in hand feeling.)

1. A worsted wool fabric dyeing process with chitosan oligosaccharide pretreatment is characterized by comprising the following steps:

s1: dissolving chitooligosaccharide, sodium bisulfite, wetting agent and acidic pH value regulator in water, and mixing to obtain acidic chitooligosaccharide solution;

s2: soaking the fabric in the chito-oligosaccharide solution obtained in S1, padding, and drying at the temperature lower than 100 ℃;

s3: adding the fabric into an acid dye solution at the temperature of 25-40 ℃, preserving heat for 10-20 min, heating to 90-95 ℃ at the speed of 1.5-2.5 ℃/min, and preserving heat for reaction for 40-80 min.

2. The process of claim 1, wherein the acid dye solution comprises a dye, an acid pH regulator, and a leveling agent.

3. The process for dyeing a worsted fabric with a chitosan oligosaccharide pretreatment according to claim 1, wherein the pH of the chitosan oligosaccharide solution is 5.5 to 6.5.

4. The process for dyeing chitosan oligosaccharide pretreated worsted fabric according to claim 2, wherein the amount of the components in the acid dye solution is as follows: 1.5-4 owf of dye, 0.8-1.5 owf of leveling agent and 0.2-1.3% of acid pH value regulator.

5. The process for dyeing chito-oligosaccharide pretreated worsted fabric according to claim 3, wherein the acidic pH regulator in S1 is disodium hydrogen phosphate-sodium dihydrogen phosphate buffer pair or disodium hydrogen phosphate-potassium dihydrogen phosphate buffer pair, and the acidic pH regulator in S3 is C2-C4 organic acid.

6. The dyeing process of a chitosan oligosaccharide pretreated worsted fabric according to claim 1, wherein the polymerization degree of the chitosan oligosaccharide in the chitosan oligosaccharide solution is 13-20, the weight percentage of the chitosan oligosaccharide is 3-7%, and the weight percentage of the sodium bisulfite is 0.3-2%.

Technical Field

The invention relates to the technical field of fabric manufacturing, in particular to a worsted wool fabric dyeing process with chitosan oligosaccharide pretreatment.

Background

Wool fibers have a low dye uptake due to the presence of surface scales compared to plant fibers such as cotton fibers. The method for improving the dye uptake rate mainly comprises the following three methods: the surface of the wool fiber is treated by low-temperature plasma, so that a scale layer is damaged and the hydrophilic performance of the fiber is improved; the ultrasonic wave helps dyeing to promote dye molecules to enter between fiber scales; adding rare earth ions into the dye liquor to assist dyeing, and improving the adsorption capacity of the dye on the surface of the fiber by utilizing the activity of the rare earth ions and the complexing capacity of the rare earth ions and dye molecules; the pretreatment adopts high molecular substances with amino, hydroxyl and the like as film forming substances to form a hydrophilic film on the surface of the wool, so that the affinity between the fiber and the dye is improved. The commonly used film-forming material is chitosan, but the hand feeling of the fabric becomes hard after the chitosan treatment.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the worsted fabric dyeing process with the chitosan oligosaccharide pretreatment, and the worsted fabric has soft handfeel and high dye-uptake.

In order to achieve the purpose, the technical scheme of the invention is as follows: a worsted wool fabric dyeing process with chitosan oligosaccharide pretreatment is characterized by comprising the following steps:

s1: dissolving chitooligosaccharide, sodium bisulfite, wetting agent and acidic pH value regulator in water, and mixing to obtain acidic chitooligosaccharide solution;

s2: soaking the fabric in the chito-oligosaccharide solution obtained in S1, padding, and drying at the temperature lower than 100 ℃;

s3: adding the fabric into an acid dye solution at the temperature of 25-40 ℃, preserving heat for 10-20 min, heating to 90-95 ℃ at the speed of 1.5-2.5 ℃/min, and preserving heat for reaction for 40-80 min.

The preferable technical scheme is that the acid dye solution comprises dye, an acid pH value regulator and a leveling agent.

The preferable technical scheme is that the pH value of the chito-oligosaccharide solution is 5.5-6.5.

The preferable technical scheme is that the using amount of the components in the acid dye liquor is as follows: 1.5-4 owf of dye, 0.8-1.5 owf of leveling agent and 0.2-1.3% of acid pH value regulator.

Preferably, the acidic pH regulator in S1 is a disodium hydrogen phosphate-sodium dihydrogen phosphate buffer pair or a disodium hydrogen phosphate-potassium dihydrogen phosphate buffer pair, and the acidic pH regulator in S3 is a C2-C4 organic acid.

The preferable technical scheme is that the polymerization degree of the chitooligosaccharide in the chitooligosaccharide solution is 13-20, the weight percentage is 3-7%, and the weight percentage of the sodium bisulfite is 0.3-2%.

The invention has the advantages and beneficial effects that:

according to the chitosan oligosaccharide pretreated worsted fabric dyeing process, the worsted fabric is pretreated by the sodium bisulfite and the chitosan oligosaccharide, the chitosan oligosaccharide and the wool fiber are typically adsorbed, the adsorption capacity of the wool fiber on acid dye is improved, the acid dye uptake is improved, and the dyed worsted fabric is soft in hand feeling.

Detailed Description

The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

Example 1 the dyeing process of the worsted woolen fabric pretreated by the chito-oligosaccharide comprises the following steps:

s1: dissolving chitooligosaccharide, sodium bisulfite, wetting agent and acidic pH value regulator in water, and mixing to obtain acidic chitooligosaccharide solution;

s2: soaking the fabric in the chito-oligosaccharide solution obtained in S1, padding, and drying at the temperature lower than 100 ℃;

s3: adding the fabric into an acid dye solution at 25 ℃, preserving heat for 20min, heating to 95 ℃ at the speed of 1.5 ℃/min, and preserving heat for reaction for 40 min.

The acid dye solution comprises dye, glacial acetic acid and leveling agent.

The pH value of the chito-oligosaccharide solution is 6.5; the polymerization degree of the chitooligosaccharide in the chitooligosaccharide solution is 13, the weight percentage is 7%, and the weight percentage of the sodium bisulfite is 0.3%. The acidic pH value regulator in S1 is disodium hydrogen phosphate-potassium dihydrogen phosphate buffer pair; the wetting agent in the chito-oligosaccharide solution is alkylphenol polyoxyethylene ether with the weight percentage of 0.5%.

The dye liquor of the acid dye comprises the following components in parts by weight: 1.5owf% of dye, 1.5owf% of leveling agent and 1 owf% of glacial acetic acid.

Example 2

Example 2 is based on example 1 with the difference that in example 2S 3: adding the fabric into an acid dye solution at 40 ℃, preserving heat for 10min, heating to 90 ℃ at the speed of 2.5 ℃/min, and preserving heat for reaction for 80 min.

The pH value of the chito-oligosaccharide solution is 5.5; the polymerization degree of the chitooligosaccharide in the chitooligosaccharide solution is 20, the weight percentage is 3%, and the weight percentage of the sodium bisulfite is 2%; the acidic pH regulator in S1 is disodium hydrogen phosphate-sodium dihydrogen phosphate buffer pair.

The dye liquor of the acid dye comprises the following components in parts by weight: dye 4owf%, leveling agent 0.8%, glacial acetic acid 0.8 owf%.

Example 3

Example 3 is based on example 2, with the difference that in example 3S 3: adding the fabric into acid dye liquor at 32 ℃, preserving heat for 15min, heating to 95 ℃ at the speed of 2 ℃/min, and preserving heat for reaction for 60 min.

The pH value of the chito-oligosaccharide solution is 6; the polymerization degree of the chitooligosaccharide in the chitooligosaccharide solution is 15, the weight percentage is 5%, and the weight percentage of the sodium bisulfite is 1%.

The dye liquor of the acid dye comprises the following components in parts by weight: 2.8owf percent of dye, 1.2 percent of leveling agent and 0.8 owf percent of glacial acetic acid.

Comparative example

Comparative example 1 is based on example 1 with the difference that the S1 chito-oligosaccharide solution is free of chito-oligosaccharide;

comparative example 2 is based on example 1 with the difference that chitosan (viscosity average molecular weight 5 ten thousand) is contained in the S1 chito-oligosaccharide solution;

the dye uptake rates of examples 1 to 3 and comparative examples 1 to 2 were respectively: 86.84%, 92.05%, 91.37%, 82.19%, 93.32%.

The dye-uptake percentage of the worsted fabric dyed was measured using a P-a0 type dyeing sample padder according to the method related to GB/T2391-2006 "determination of fixation of reactive dyes".

The fabrics of examples 1-3 had better tactile comfort than comparative example 2 as measured by the textile tactile comfort tester.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.