阅读说明：本技术 一种可溶丝用于无捻毛巾上的碱溶处理工艺 (Alkali dissolving treatment process for soluble yarn on untwisted towel ) 是由 贾李锋 冯志玲 彭趁义 张在成 侯玉娟 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种可溶丝用于无捻毛巾上的碱溶处理工艺,包括以下步骤：(1)在化料缸内加入清水,升温到38～42℃,按照可溶丝在毛巾生坯中的含量确定的碱液的浓度加入液碱,同时打开搅拌,搅拌5～15min；(2)将配制好的碱液循环抽入主缸,浴比为1:6～9,38～42℃循环4～8min；(3)将主缸升温速率控制在1.5～2.5℃/min进行升温达到105～115℃；保温运行35～45min,然后降温至60～80℃排水；(4)主缸内加入45～55℃清水水洗,循环10～20min,然后再次重复水洗一次,碱处理结束。本发明解决了统一用高碱剂导致的产品整体颜色偏暗问题,降低了生产成本。(The invention discloses an alkali dissolving treatment process for soluble yarn on untwisted towels, which comprises the following steps: (1) adding clean water into the material melting cylinder, heating to 38-42 ℃, adding liquid alkali according to the concentration of alkali liquor determined by the content of the soluble yarn in the towel green body, simultaneously opening stirring, and stirring for 5-15 min; (2) circularly pumping the prepared alkali liquor into a main cylinder, wherein the bath ratio is 1: 6-9, and circulating for 4-8 min at 38-42 ℃; (3) controlling the temperature rise rate of the main cylinder to be 1.5-2.5 ℃/min, and raising the temperature to 105-115 ℃; performing heat preservation operation for 35-45 min, and then cooling to 60-80 ℃ for draining; (4) and (3) adding clear water at the temperature of 45-55 ℃ into the main cylinder for washing, circulating for 10-20 min, then repeating the washing once again, and finishing the alkali treatment. The invention solves the problem of dark integral color of the product caused by uniformly using the high-alkali agent, and reduces the production cost.)

1. An alkali dissolving treatment process for soluble yarn on untwisted towels is characterized by comprising the following steps:

(1) adding clean water into a material dissolving cylinder of a high-temperature high-pressure overflow machine, heating to 38-42 ℃, slowly adding weighed liquid alkali according to the concentration of alkali liquor determined by the content of the soluble yarn in the towel green body, simultaneously opening stirring, covering a material dissolving cylinder cover, and stirring for 5-15 min;

(2) starting a main pump, circularly pumping the prepared alkali liquor into a main cylinder, wherein the bath ratio is 1: 6-9, and circulating for 4-8 min at 38-42 ℃;

(3) after alkali liquor in the main cylinder is fully circulated, controlling the temperature rise rate of the main cylinder at 1.5-2.5 ℃/min for temperature rise to achieve the optimal removal temperature of the fusible fibers at 105-115 ℃; the temperature is kept for 35-45 min, the soluble filaments are fully dissolved, and then the temperature is reduced to 60-80 ℃ for drainage;

(4) and (3) adding clear water at the temperature of 45-55 ℃ into the main cylinder for washing, circulating for 10-20 min, then repeating the washing once again, and finishing the alkali treatment.

2. The process for alkali-dissolving soluble yarn used for untwisted towels according to claim 1, wherein: in the step (1), the concentration of the alkali liquor determined according to the content of the soluble yarn in the towel green body means that when the mass content of the soluble yarn in the towel green body is 6-8%, the concentration of the used alkali liquor is 16 g/l; when the mass content of the soluble yarn in the towel green body is 8-10%, the concentration of the used alkali liquor is 18 g/l; when the mass content of the soluble yarn in the towel green body is 10% or more, the concentration of the alkali liquor used is 20 g/l.

3. The process for alkali-dissolving soluble yarn used for untwisted towels according to claim 1, wherein: circularly boiling and bleaching the towel green body without the alkali soluble fibers at 80-90 ℃ for 45-55 min, then draining water, washing with water for 10-15 min, and then sequentially carrying out post-treatment steps of neutralization, deoxidation and dyeing.

4. The process for alkali-dissolving soluble yarn used for untwisted towels according to claim 3, wherein: during boiling and bleaching, the concentration of the alkali liquor in the boiling and bleaching liquid is determined according to the content of the soluble yarn in the towel green body, and when the mass content of the soluble yarn in the towel green body is 6-8%, the concentration of the alkali liquor in the boiling and bleaching liquid is 4.4 g/l; when the mass content of the soluble yarn in the towel green body is 8-10%, the concentration of the alkali liquor in the bleaching solution is 3.5 g/l; when the mass content of soluble silk in the towel green body is 10 percent or more, the concentration of alkali liquor in the boiling and bleaching liquid is 2.2 g/l.

5. The process for alkali-dissolving soluble yarn used for untwisted towels according to claim 3, wherein: the boiling and bleaching liquid during boiling and bleaching contains 7-9 g/l of hydrogen peroxide, 2-4 g/l of hydrogen peroxide stabilizer and 0.3-0.5 g/l of efficient penetrant Euler Von SX.

Technical Field

The invention relates to the technical field of textile printing and dyeing, in particular to an alkali-dissolving treatment process for soluble yarn on untwisted towels.

Background

The twistless yarn towel has wide application market due to the characteristics of soft hand feeling and high water absorption, but still faces expensive production cost and consumes a large amount of soluble PVA (15-30% of the weight of the towel), wherein after the traditional PVA water-soluble silk is dissolved, the twistless yarn towel can still stay in the environment for decades and is difficult to degrade, and the sewage treatment cost is high. Due to the fact that the country controls the environment-friendly continuous high-pressure situation, the discharge and recovery of untwisted yarn water-soluble PVA wastewater are strictly supervised, and the batch production of untwisted yarn products is bottleneck.

The high-alkali soluble silk solucel is an ideal material for replacing PVA (polyvinyl alcohol) in the production of the untwisted towel, and is easy to dissolve in water, degrade and have no adverse effect on the environment, which means that the same product is produced, the sewage treatment cost is reduced, and the cost is reduced. Therefore, the popularization and application significance of the high-alkali water soluble thread is far-reaching, and the high-alkali water soluble thread can completely replace the traditional water soluble thread in terms of function.

Aiming at the current situation, a novel untwisted yarn weaving technology and a dyeing and finishing treatment method which are popularized and environmentally friendly and can replace PVA (polyvinyl alcohol) are imperative. solucel is a Polyester (PET) based soluble filament. Under the action of alkali, molecular chain breaking occurs, powder is formed gradually and washed out by water, and the reaction is irreversible. If the dissolution is insufficient, the solvent can be dissolved again under the condition of low alkali. The greater the amount of base, the more complete the contact, the more complete the reaction and the more complete the dissolution. Therefore, in the prior art, high-concentration alkali liquor is generally used for completely dissolving alkali, but the whole color of the product is dark due to the high-alkali agent, so that the development of the water-soluble silk solucel in the field of towels is restricted.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the alkali-soluble treatment process for the untwisted yarn towel by using the soluble yarn is provided, the soluble yarn can be directly degraded, the sewage treatment cost is reduced, and the untwisted yarn towel made by using the alkali-soluble treatment process is fluffy and full in style, soft and skin-friendly in body and bright in color.

In order to solve the technical problems, the technical scheme of the invention is as follows:

an alkali dissolving treatment process for soluble yarn on untwisted towels, which comprises the following steps:

(1) adding clean water into a material dissolving cylinder of a high-temperature high-pressure overflow machine, heating to 38-42 ℃, slowly adding weighed liquid alkali according to the concentration of alkali liquor determined by the content of the soluble yarn in the towel green body, simultaneously opening stirring, covering a material dissolving cylinder cover, and stirring for 5-15 min;

(2) starting a main pump, pumping the prepared alkali liquor into a main cylinder at the speed of 55-60% and the rotation speed of 65-70 m/min in a circulating manner, wherein the bath ratio is 1: 6-9, the alkali liquor circulates for 4-8 min at 38-42 ℃, and the measured pH value is 11-14;

(3) after alkali liquor in the main cylinder is fully circulated, controlling the temperature rise rate of the main cylinder at 1.5-2.5 ℃/min for temperature rise to achieve the optimal removal temperature of the fusible fibers at 105-115 ℃; the temperature is kept for 35-45 min, the soluble filaments are fully dissolved, and then the temperature is reduced to 60-80 ℃ for drainage;

(4) and (3) adding clear water at 45-55 ℃ into the main cylinder for washing, circulating for 10-20 min, then repeating washing once again, measuring the pH value to be 8-11, and finishing the alkali treatment.

As a preferred technical solution, the soluble yarn is Polyester (PET) -based soluble filament (soluble filament).

As an improved technical scheme, in the step (1), the concentration of the alkali liquor determined according to the content of the soluble yarn in the towel green body means that when the mass content of the soluble yarn in the towel green body is 6-8%, the concentration of the used alkali liquor is 16 g/l; when the mass content of the soluble yarn in the towel green body is 8-10%, the concentration of the used alkali liquor is 18 g/l; when the mass content of the soluble yarn in the towel green body is 10% or more, the concentration of the alkali liquor used is 20 g/l.

As an improved technical scheme, the towel green body after alkali silk dissolving removal is circularly boiled and bleached at 80-90 ℃ for 45-55 min, then drained, washed in water for 10-15 min, and then sequentially subjected to post-treatment steps of neutralization, deoxidation and dyeing.

As an improved technical scheme, during the boiling and bleaching, the concentration of alkali liquor in the boiling and bleaching liquid is determined according to the content of soluble fibers in the towel green body, and when the mass content of the soluble fibers in the towel green body is 6-8%, the concentration of the alkali liquor in the boiling and bleaching liquid is 4.4 g/l; when the mass content of the soluble yarn in the towel green body is 8-10%, the concentration of the alkali liquor in the bleaching solution is 3.5 g/l; when the mass content of soluble silk in the towel green body is 10 percent or more, the concentration of alkali liquor in the boiling and bleaching liquid is 2.2 g/l.

As a further improved technical scheme, the bleaching solution during bleaching contains 7-9 g/l of hydrogen peroxide, 2-4 g/l of hydrogen peroxide stabilizer and 0.3-0.5 g/l of efficient penetrant Euler von SX.

Preferably, the European style Von SX is produced by textile dyeing of Hensman.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

the soluble yarn is used for an alkali dissolving treatment process on the untwisted towel, the alkali agent process is adjusted according to the addition amount of alkali liquor determined according to the content of the soluble yarn in a towel green body and the percentage of the occupied components of the product during alkali dissolving, and the soluble yarn content in the product structure is 6-8% through multiple tests; 8% -10%; more than 10 percent of the total weight of the yarn is treated by different processes, so that the problem of dark overall color of products caused by uniformly using a high-alkali agent is solved, the problem of inconsistent color and style of products treated by different contents is solved, and the effect of untwisted yarns is achieved.

The addition amount of the alkali liquor is determined according to the content of the soluble silk in the towel green body during alkali dissolution, the content of the soluble silk is higher, the concentration of the used alkali liquor is higher, and the alkali content after washing is also high, so that the amount of the alkali liquor required to be added during boiling and bleaching is relatively reduced, an ideal boiling and bleaching effect can be achieved, the alkali consumption during boiling and bleaching is relatively reduced, and the production cost is reduced.

Detailed Description

The invention is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1

The mass content of soluble silk in the towel green body is 7%:

adding clear water into a material dissolving tank of a high-temperature high-pressure overflow machine, heating to 40 ℃, slowly adding weighed liquid alkali until the concentration of the alkali liquor in the material dissolving tank is 16g/l, simultaneously opening the stirring, covering a material dissolving tank cover, and stirring for 10 min.

Starting the main pump, pumping the prepared alkali liquor into the main cylinder at a speed of 58% and a rotation speed of 68m/min, circulating at 40 ℃ for 6min at a bath ratio of 1:8, and measuring the pH value to be 11.5.

After alkali liquor in the main cylinder is fully circulated, controlling the heating rate of the main cylinder at 2.0 ℃/min for heating to reach the optimal removal temperature of the fusible fibers of 110 ℃; keeping the temperature for 40min, fully dissolving the soluble filaments, and then cooling to 80 ℃ for draining.

Adding 50 ℃ clean water into the main cylinder for washing, circulating for 15min, then repeating the washing once again, measuring the pH value to be 9, and finishing the alkali treatment.

And (2) boiling and bleaching the towel green blank after alkali silk dissolving is removed, wherein the alkali concentration in the boiling and bleaching solution is 4.4g/l, 8g/l of hydrogen peroxide, 3g/l of hydrogen peroxide stabilizer and 0.4g/l of high-efficiency penetrant Euler Von SX0.4g/l during boiling and bleaching, discharging water after circularly boiling and bleaching for 50min at 85 ℃, washing for 10min in water, and then sequentially performing post-treatment steps of neutralization, deoxidation and dyeing.

Example 2

The mass content of soluble silk in the towel green body is 9%:

adding clear water into a material dissolving tank of a high-temperature high-pressure overflow machine, heating to 41 ℃, slowly adding weighed liquid alkali until the concentration of the alkali liquor in the material dissolving tank is 18g/l, simultaneously opening the stirring, covering a material dissolving tank cover, and stirring for 12 min.

Starting the main pump, pumping the prepared alkali liquor into the main cylinder at the speed of 57% and the rotation speed of 67m/min, circulating at 41 ℃ for 5min at the bath ratio of 1:7, and measuring the pH value to be 11.5.

After alkali liquor in the main cylinder is fully circulated, controlling the heating rate of the main cylinder at 2.2 ℃/min for heating to reach the optimal removal temperature of the fusible fibers of 112 ℃; and (4) keeping the temperature for 38min, fully dissolving the soluble filaments, and then cooling to 78 ℃ for draining.

Adding clean water of 52 ℃ into the main cylinder for washing, circulating for 10min, then repeating the washing once again, measuring the pH value to be 9.5, and finishing the alkali treatment.

And (2) boiling and bleaching the towel green blank after alkali silk dissolving is removed, wherein the alkali concentration in the boiling and bleaching solution is 3.5g/l, 8.2g/l of hydrogen peroxide, 2.8g/l of hydrogen peroxide stabilizer and 0.35g/l of high-efficiency penetrant Euler Von SX during boiling and bleaching, water is discharged after cyclic boiling and bleaching for 48min at 88 ℃, water is added for washing for 12min, and then the post-treatment steps of neutralization, deoxidation and dyeing are sequentially carried out.

Example 3

The mass content of soluble silk in the towel green body is 12%:

adding clear water into a material dissolving tank of a high-temperature high-pressure overflow machine, heating to 42 ℃, slowly adding weighed liquid alkali until the concentration of the alkali liquor in the material dissolving tank is 20g/l, simultaneously opening the stirring, covering a material dissolving tank cover, and stirring for 10 min.

Starting the main pump, pumping the main pump at 60% speed and 70m/min, pumping the prepared alkali liquor into the main cylinder at a bath ratio of 1:9, circulating at 39 ℃ for 7min, and measuring the pH value to be 13.5.

After alkali liquor in the main cylinder is fully circulated, controlling the heating rate of the main cylinder at 1.8 ℃/min for heating to reach the optimal removal temperature of the fusible fibers of 108 ℃; keeping the temperature for 45min, fully dissolving the soluble filaments, and then cooling to 70 ℃ for draining.

Adding clean water of 52 ℃ into the main cylinder for washing, circulating for 12min, then repeating the washing once again, measuring the pH value to be 10.5, and finishing the alkali treatment.

And (2) boiling and bleaching the towel green blank after alkali silk dissolving is removed, wherein the alkali concentration in the boiling and bleaching solution during boiling and bleaching is 2.2g/l, 7.8g/l of hydrogen peroxide, 3.2g/l of hydrogen peroxide stabilizer and 0.45g/l of high-efficiency penetrant Euler Von SX, circularly boiling and bleaching at 86 ℃ for 48min, then discharging water, washing with water for 15min, then sequentially carrying out post-treatment steps of neutralization, deoxidation and dyeing.

The grey cloth treated in examples 1-3 was tested and the dyeing specifications were as follows in table 1 (liquid caustic soda 38 baume degree, hydrogen peroxide 27.5 wt.%).

TABLE 1

Item	Whiteness degree	Capillary effect cm	pH value	Oxygen content
					Example 1	72.4	11.5	7	0
Example 2	76.8	11.8	7.2	0
					Example 3	80.1	12	7.2	0