阅读说明：本技术 低浴比潮态无纺布碱减量方法 (Alkali decrement method for low bath ratio moisture nonwoven fabric ) 是由 王维峰 王琳 王文 刘松松 肖鹏业 王志华 李政华 安传静 陈浩浩 孙宁宁 于 2020-07-28 设计创作，主要内容包括：本发明涉及一种无纺布加工技术,具体涉及一种低浴比潮态无纺布碱减量方法。包括以下步骤：(1)配制碱减量液：将NaOH、碱减量促进剂置于水中,搅拌均匀,配置成碱减量液,其中,NaOH的浓度为10-21g/L,碱减量促进剂的浓度为1-2g/L；(2)按浴比1:3-1:5加软化水到气流染色机中,再注入碱减量液,然后投入无纺布,由于无纺布吸水量大,缸内见不到水,通过调节喷嘴流量和风机风量使无纺布在潮态下均匀降解,喷嘴流量400-500L/min,风机风速10-20米/秒,减量率达到30％以上。本发明在潮态下对无纺布进行碱减量处理,解决了传统无纺布碱减量浴比大、用水多、能耗高的问题。(The invention relates to a non-woven fabric processing technology, in particular to a low bath ratio moisture non-woven fabric alkali decrement method. The method comprises the following steps: (1) preparing alkali decrement solution: putting NaOH and an alkali weight reduction promoter into water, and uniformly stirring to prepare an alkali weight reduction solution, wherein the concentration of the NaOH is 10-21g/L, and the concentration of the alkali weight reduction promoter is 1-2 g/L; (2) adding softened water into an airflow dyeing machine according to a bath ratio of 1:3-1:5, then injecting alkali decrement liquid, and then putting the non-woven fabric into the airflow dyeing machine, wherein the non-woven fabric has large water absorption capacity, so that water cannot be seen in a cylinder, the non-woven fabric is uniformly degraded in a damp state by adjusting the flow of a nozzle and the air volume of a fan, the flow of the nozzle is 400-. The alkali deweighting treatment is carried out on the non-woven fabric in a moist state, and the problems of large alkali deweighting bath ratio, more water consumption and high energy consumption of the traditional non-woven fabric are solved.)

1. A low bath ratio moisture nonwoven fabric alkali decrement method is characterized in that: the method comprises the following steps:

(1) preparing alkali decrement solution:

placing NaOH and an alkali weight reduction promoter in water, and stirring uniformly to prepare an alkali weight reduction solution, wherein the concentration of the NaOH is 10-21g/L, and the concentration of the alkali weight reduction promoter is 1-2 g/L;

(2) adding softened water into the airflow dyeing machine, injecting alkali decrement liquid, then putting the non-woven fabric into the airflow dyeing machine for treatment, controlling the non-woven fabric to operate in a damp state all the time by adjusting the flow of the nozzle and the air quantity of the fan, wherein the flow of the nozzle is 400 plus one liter/min, and the air speed of the fan is 10-20 m/s.

2. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: the alkali decrement promoter is one of quaternary ammonium salt surfactant or dispersant.

3. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 2, wherein: the quaternary ammonium salt surfactant is one of dodecyl dimethyl benzyl ammonium chloride or diethyl maleate bis (dodecyl dimethyl ammonium chloride).

4. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 2, wherein: the dispersant is isooctanol ether phosphate or isooctanol polyoxyethylene ether.

5. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: adding softened water into the airflow dyeing machine according to the bath ratio of 1:3-1: 5.

6. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: the air flow dyeing machine is an ultra-low bath ratio air flow dyeing machine or a gas-liquid dyeing machine.

7. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: the non-woven fabric is one of PA 50% PET 50% microfiber composite fabric or PET 100% non-woven fabric.

8. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: adding non-woven fabric for treatment at 95-115 deg.C for 20-45 min.

9. The alkali weight reduction method for the low bath ratio wet nonwoven fabric according to claim 1, wherein: the reduction rate of the non-woven fabric treated by the method reaches more than 30 percent.

Technical Field

The invention relates to a non-woven fabric processing technology, in particular to a low bath ratio moisture non-woven fabric alkali decrement method.

Background

The polyester non-woven fabric has the advantages that the benzene ring is contained in the main chain of the polyester molecule, so that the macromolecular chain is difficult to rotate, the molecular flexibility is poor, and the benzene ring and the hydroxyl plane are almost parallel to the fiber axis, so that the polyester non-woven fabric has high geometric regularity, the intermolecular force is strong, the molecular arrangement is compact, the orientation degree and the crystallinity degree after spinning are high, the fiber elastic modulus is high, the hand feeling is hard, the rigidity is high, the water absorption is poor, and therefore, the alkali decrement is needed.

At present, the common alkali deweighting processing equipment and process for non-woven fabrics (terylene) mainly comprise the following devices:

(1) intermittent alkali decrement processing, normal temperature liquid flow dyeing machine, which runs in rope shape under normal pressure, has low tension, easy control of decrement rate, but easy occurrence of straight wrinkle, large bath ratio and high alkali consumption.

(2) The intermittent alkali decrement processing and high-temperature high-pressure jet liquid flow dyeing machine has the advantages of low tension, high temperature, complete alkali reaction, wide adaptability and capability of processing various fabrics. The disadvantages are as follows: large bath ratio, high alkali consumption and high energy consumption.

(3) And continuous alkali decrement processing is adopted, and the continuous alkali decrement is suitable for batch continuous production and has high yield. However, the method has the problems of large alkali input amount at one time, difficult alkali concentration control and terylene hydrolysate filtration removal in operation and the like, and the fabric tension is large during processing, so the method is not suitable for small-batch and multi-variety production, and the fabric style is not as good as that of intermittent alkali decrement.

Therefore, the batch processing is still the first choice from the aspects of product style and market demand, but the batch processing has the common problems of large bath ratio, more water consumption and high energy consumption.

Disclosure of Invention

The invention aims to provide a method for alkali decrement of a low bath ratio moisture-state non-woven fabric, which solves the problems of large bath ratio, more water consumption and high energy consumption of the traditional non-woven fabric alkali decrement.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention discloses a low bath ratio moisture non-woven fabric alkali decrement method, which comprises the following steps:

(1) preparing alkali decrement solution:

placing NaOH and an alkali weight reduction promoter in water, and stirring uniformly to prepare an alkali weight reduction solution, wherein the concentration of the NaOH is 10-21g/L, and the concentration of the alkali weight reduction promoter is 1-2 g/L;

(2) adding softened water into the airflow dyeing machine, injecting alkali decrement liquid, then putting the non-woven fabric into the airflow dyeing machine for treatment, controlling the non-woven fabric to operate in a damp state all the time by adjusting the flow of the nozzle and the air quantity of the fan, wherein the flow of the nozzle is 400 plus one liter/min, and the air speed of the fan is 10-20 m/s. In the alkali decrement treatment process of the non-woven fabric, the wind pressure generated by a fan and a cloth lifting wheel rotate to drive the non-woven fabric to circulate. The alkali liquor is uniformly acted on the treated non-woven fabric by adjusting the flow of the nozzle and the air quantity of the fan, the treatment time is controlled to be 20-45min and the treatment temperature is controlled to be 95-115 ℃ in combination with the treatment time and the treatment temperature, and the control of the decrement size of the non-woven fabric can be realized. The non-woven fabric decrement effect is mainly controlled by the treatment time and the temperature.

Wherein:

in the step (1), the alkali decrement accelerator is one of quaternary ammonium salt surfactant or dispersant.

The quaternary ammonium salt surfactant is one of dodecyl dimethyl benzyl ammonium chloride or diethyl maleate bis (dodecyl dimethyl ammonium chloride).

The dispersant is isooctanol ether phosphate or isooctanol polyoxyethylene ether.

Softened water is added into the airflow dyeing machine at an ultralow bath ratio of 1:3-1:5, so that the alkali consumption and water consumption are greatly reduced. In the whole process, except the amount of alkali liquor contained in the non-woven fabric adsorption and the minimum liquid amount required by the water pump circulation, no excess liquid exists, almost no liquid is seen in the machine, and the non-woven fabric is processed in a moist state.

In the step (2), the gas flow dyeing machine is an ultralow bath ratio gas flow dyeing machine or a gas-liquid dyeing machine, and the gas is used for pushing the adsorption liquid in the non-woven fabric to flow so as to achieve the effect of uniform treatment.

In the step (2), measures for uniform operation in a wet state mainly depend on the flow rate of the nozzle and the air quantity of the fan, so that the minimum water quantity required by the operation of the pump is ensured, and meanwhile, under the coordination of treatment time and temperature, the flow of treatment liquid in the fabric is realized, and the operation with the ultralow bath ratio is realized.

The non-woven fabric is one of PA 50% PET 50% microfiber composite cloth or PET 100% non-woven fabric. The PA 50% PET 50% microfiber composite cloth is one kind of non-woven fabric, and is formed by uniformly mixing PA 50% and PET 50% and then spraying the mixture at a high speed on a non-woven fabric production line. After being processed, the fabric is mainly used in the fields of medical protection, beauty treatment and make-up, clothing accessories and the like. The processed product of the invention is mainly used in the field of beauty and make-up. The invention is also suitable for the low bath ratio alkali deweighting treatment of other polyester textiles.

The reduction rate of the non-woven fabric treated by the method reaches more than 30 percent.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention adopts the ultra-low bath ratio of 1:3-1:5, and the non-woven fabric can absorb water up to 300%, so the processing process is basically in the environment without flowing water, namely under the moist state, the fiber binding liquid is pushed to flow in the non-woven fabric by gas, and the uniform alkali decrement is realized.

2. The invention changes the alkali consumption, the water consumption and the process route in the alkali decrement treatment process of the traditional liquid flow dyeing machine. Compared with the traditional liquid flow dyeing machine, the using amount of water and NaOH is reduced by more than 50 percent. The alkali decrement treatment method for the damp non-woven fabric has the advantages of simple process, good treatment effect, cost saving and reduction of the load of sewage treatment of enterprises. Is a clean production process which meets the requirement of environmental protection and has extremely high social and economic benefits.

Drawings

FIG. 1 shows the operation of the nonwoven fabric of the present invention in a machine (no treatment fluid is present in the machine, and the fabric is moved by an air stream);

FIG. 2 shows the effect of the nonwoven fabric treatment of the present invention.

Detailed Description

The present invention will be further described with reference to the following embodiments.