阅读说明：本技术 一种复合超纤直涂工艺 (Composite microfiber direct coating process ) 是由 董怀志 崔安峰 岳明明 薛乐芝 于 2019-11-15 设计创作，主要内容包括：本发明涉及复合超纤技术领域,且公开了一种复合超纤直涂工艺,一种复合超纤的制备工艺,复合超纤的配方包括178dtex/72f×16p复合纤维、NaOH(AR)、HAc(AR)、Na<Sub>2</Sub>CO<Sub>3</Sub>(AR)及渗透剂JFC,178dtex/72f×16p复合纤维经化学开纤法处理制得超细纤维,化学开纤的工艺流程为：将178dtex/72f×16p复合纤维依次进行水洗、开纤、清水洗、酸洗、清水洗至中性最后进行烘干处理,优选的,水洗的工艺为：将178dtex/72f×16p复合纤维用2％的Na<Sub>2</Sub>CO<Sub>3</Sub>溶液在50℃处理30分钟,然后再水洗净,挤干,该复合超纤直涂工艺,通过上述技术方案生产出来的产品经实验测得如图3所示,其撕裂强力、剥离强力、断裂强力、纤维损伤和平整度等各项性能相较于目前市场上大多数的产品性能提高百分之二十。(The invention relates to the technical field of composite microfiber, and discloses a composite microfiber direct coating process, a preparation process of composite microfiber, wherein the formula of the composite microfiber comprises 178dtex/72f multiplied by 16p composite fiber, NaOH (AR), HAc (AR), and Na 2 CO 3 (AR) and penetrant JFC, 178dtex/72f multiplied by 16p composite fiber are processed by a chemical fiber opening method to prepare superfine fiber, and the process flow of the chemical fiber opening method is as follows: the 178dtex/72f multiplied by 16p composite fiber is sequentially subjected to water washing, fiber opening, clear water washing, acid washing, clear water washing to neutrality and finally drying treatment, and the preferable water washing process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is mixed with 2% Na 2 CO 3 Treating the solution at 50 deg.C for 30 min, washing with water, squeezing, and directly coating the composite microfiberThe product produced by the technical scheme is proved by experiments to be as shown in fig. 3, and compared with most of the product in the current market, the product has the advantages that the tearing strength, the peeling strength, the breaking strength, the fiber damage, the flatness and other performances are improved by twenty percent.)

1. A preparation process of composite microfiber is characterized in that: the formula of the composite microfiber comprises 178dtex/72f multiplied by 16p composite fiber, NaOH (AR), HAc (AR) and Na₂CO₃(AR) and penetrant JFC;

the 178dtex/72f multiplied by 16p composite fiber is processed by a chemical fiber opening method to prepare the superfine fiber.

2. The process for preparing a composite microfiber according to claim 1, wherein: the chemical fiber opening process comprises the following steps: and (3) sequentially carrying out water washing, fiber opening, clear water washing, acid washing and clear water washing on the 178dtex/72f multiplied by 16p composite fiber until the composite fiber is neutral, and finally carrying out drying treatment.

3. The process for preparing a composite microfiber according to claim 2, wherein: the washing process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is mixed with 2% Na₂CO₃The solution was treated at 50 ℃ for 30 minutes, then washed with water and squeezed to dryness.

4. The process for preparing a composite microfiber according to claim 2, wherein: the drying process comprises the following steps: the washed fiber is dried in a drying oven at 105 ℃ for 30 minutes and then transferred into a dryer for 4 hours with constant weight.

5. The process for preparing a composite microfiber according to claim 2, wherein: the pickling process comprises the following steps: washed twice with 2g/L HAc solution.

6. The process for preparing a composite microfiber according to claim 2, wherein: the fiber opening process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is put into a stainless steel dyeing tank in an infrared heating sample dyeing machine, the prepared working solution (penetrating agent JFC2g/L, a plurality of NaOH solutions, the bath ratio is 1:50) is added, and 5 steel balls with the diameter of 1cm are added.

7. A composite microfiber direct coating process is characterized in that: comprises the following steps in sequence: unreeling release paper, coating waterborne polyurethane surface layer slurry on the release paper on a first coating table, drying in an oven, cooling, continuously coating waterborne polyurethane middle layer slurry on a second coating table, drying in the oven, cooling, continuously coating waterborne polyurethane adhesive layer slurry on a third coating table, adhering with base cloth, drying in the oven, cooling, separating the release paper from a composite microfiber finished product, rolling, printing on a surface, rubbing lines, trimming, sizing, inspecting, packaging and warehousing.

8. The composite microfiber direct coating process according to claim 7, wherein: the first precision coating: coating thickness of about 0.10-0.15mm, cooling and shaping after completely drying, and performing secondary precision coating: coating to a thickness of about 0.15-0.50mm, completely baking, and cooling for shaping; and (3) precision coating for the third time: controlling the coating thickness to be about 0.12-0.15mm, drying to be in a semi-dry wet state, attaching the ground by a laminating machine, drying and cooling in a three-furnace oven, finally carrying out coil splitting to obtain a finished product, and then carrying out three-plate treatment according to the process requirements of the product;

the three-plate treatment is to adopt a water-based treating agent to carry out effects such as brightening and delustering on the surface of the leather or directly carry out grain kneading (dry kneading, according to the effect that the leather base cloth is uniformly and fully shrunk into grains by temperature, the temperature is generally controlled to be about 60-70 ℃, the heating time is 30 minutes, and the leather is taken out to be finished and packaged to form a finished product).

Technical Field

The invention relates to the technical field of composite microfiber, in particular to a composite microfiber direct coating process.

Background

The microfiber is short for superfine fiber PU synthetic leather, and is superfine fiber short fiber which is made into non-woven fabric with a three-dimensional structure network through carding and needling, and then is processed by a wet method, PU resin is impregnated, alkali is reduced, and leather grinding, dyeing and finishing and other processes are carried out to finally prepare the superfine fiber leather. Superfine fiber is added into PU polyurethane, so that the toughness, air permeability and wear resistance are further enhanced; has excellent wear resistance, cold resistance, air permeability and aging resistance.

Since 2000 years later, many enterprises in China have been invested in research and development and production of microfiber, such as Huafeng microfiber, Shuangxiang microfiber, Yongxiang synthetic material, etc. The microfiber has better physical properties than real leather and has a stable surface layer, so that the microfiber can almost replace real leather and is widely applied to clothing coats, furniture sofas, decorative soft packages, gloves, automobile seats, automobile interiors, photo frame albums, notebook computer outer skins, electronic product protective sleeves, daily necessities and the like.

However, most of the composite microfiber fibers on the market at present have poor fiber breaking strength and other performance indexes.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a composite microfiber direct coating process which has the advantages of improving the performance of composite microfibers and the like.

(II) technical scheme

In order to achieve the purpose of improving the performance of the composite microfiber, the invention provides the following technical scheme: a composite super-fibre is prepared from 178dtex/72f 16p composite fibre, NaOH (AR), HAc (AR) and Na₂CO₃(AR) and penetrant JFC;

the 178dtex/72f multiplied by 16p composite fiber is processed by a chemical fiber opening method to prepare the superfine fiber.

The chemical fiber opening process comprises the following steps: and (3) sequentially carrying out water washing, fiber opening, clear water washing, acid washing and clear water washing on the 178dtex/72f multiplied by 16p composite fiber until the composite fiber is neutral, and finally carrying out drying treatment.

Preferably, the water washing process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is mixed with 2% Na₂CO₃The solution was treated at 50 ℃ for 30 minutes, then washed with water and squeezed to dryness.

Preferably, the drying process comprises the following steps: the washed fiber is dried in a drying oven at 105 ℃ for 30 minutes and then transferred into a dryer for 4 hours with constant weight.

Preferably, the pickling process comprises the following steps: washed twice with 2g/L HAc solution.

Preferably, the fiber opening process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is put into a stainless steel dyeing tank in an infrared heating sample dyeing machine, the prepared working solution (penetrating agent JFC2g/L, a plurality of NaOH solutions, the bath ratio is 1:50) is added, and 5 steel balls with the diameter of 1cm are added.

A composite microfiber direct coating process comprises the following steps: unreeling release paper, coating waterborne polyurethane surface layer slurry on the release paper on a first coating table, drying in an oven, cooling, continuously coating waterborne polyurethane middle layer slurry on a second coating table, drying in the oven, cooling, continuously coating waterborne polyurethane adhesive layer slurry on a third coating table, adhering with base cloth, drying in the oven, cooling, separating the release paper from a composite microfiber finished product, rolling, printing on a surface, rubbing lines, trimming, sizing, inspecting, packaging and warehousing.

Preferably, the first precision coating comprises: coating thickness of about 0.10-0.15mm, cooling and shaping after completely drying, and performing secondary precision coating: coating to a thickness of about 0.15-0.50mm, completely baking, and cooling for shaping; and (3) precision coating for the third time: controlling the coating thickness to be about 0.12-0.15mm, drying to be in a semi-dry wet state, attaching the ground by a laminating machine, drying and cooling in a three-furnace oven, finally carrying out coil splitting to obtain a finished product, and then carrying out three-plate treatment according to the process requirements of the product;

the three-plate treatment is to adopt a water-based treating agent to carry out effects such as brightening and delustering on the surface of the leather or directly carry out grain kneading (dry kneading, according to the effect that the leather base cloth is uniformly and fully shrunk into grains by temperature, the temperature is generally controlled to be about 60-70 ℃, the heating time is 30 minutes, and the leather is taken out to be finished and packaged to form a finished product).

(III) advantageous effects

Compared with the prior art, the invention provides the display device for the online teaching based on the intelligent control, which has the following beneficial effects:

1. according to the composite microfiber direct coating process, the product produced by the technical scheme is shown in fig. 3 through experimental tests, and compared with the product performance of most products in the current market, the product has the advantages that the tearing strength, the peeling strength, the breaking strength, the fiber damage, the flatness and the like are improved by twenty percent.

2. The composite microfiber direct coating process adopts a single factor alternation method, and by examining the influence of the concentration, time and temperature of opened alkali liquor on the fiber performance alkali reduction rate under the condition of existence of mechanical action, the result is shown in figure 1, and as can be seen from figure 1, the alkali reduction rate of fibers is increased along with the extension of fiber opening time, the increase of NaOH concentration and the increase of temperature, and the mechanical action is increased by adding steel balls into a steel cup under the same condition, so that the alkali reduction rate of the fibers can be increased.

3. The composite microfiber direct coating process adopts a single factor alternation method, the influence of the concentration, time and temperature of opened alkali liquor on the fiber breaking strength is examined under the condition of existence of mechanical action, the breaking strength of the polyester-nylon composite microfiber is reduced along with the extension of the fiber opening time, the increase of NaOH concentration and the increase of temperature, and the mechanical action is increased by adding steel balls into a steel cup under the same condition, so that the fiber breaking strength can be reduced.

Drawings

FIG. 1 is a graph showing the relationship between the splitting condition and the alkali reduction rate according to the present invention;

FIG. 2 is a graph showing the relationship between the splitting condition and the breaking strength according to the present invention;

FIG. 3 is a graph showing various performance indicators of the composite microfiber product of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A composite superfine fiber is prepared from 178dtex/72f 16p composite fiber, NaOH (AR), HAc (AR), and Na₂CO₃(AR) and penetrant JFC;

178dtex/72f multiplied by 16p composite fiber is processed by a chemical fiber opening method to prepare the superfine fiber.

The chemical fiber opening process flow comprises the following steps: and (3) sequentially carrying out water washing, fiber opening, clear water washing, acid washing and clear water washing on the 178dtex/72f multiplied by 16p composite fiber until the composite fiber is neutral, and finally carrying out drying treatment.

The washing process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is mixed with 2% Na₂CO₃The solution was treated at 50 ℃ for 30 minutes, then washed with water and squeezed to dryness.

The drying process comprises the following steps: the washed fiber is dried in a drying oven at 105 ℃ for 30 minutes and then transferred into a dryer for 4 hours with constant weight.

The pickling process comprises the following steps: washed twice with 2g/L HAc solution.

The fiber opening process comprises the following steps: 178dtex/72f is multiplied by 16p composite fiber is put into a stainless steel dyeing tank in an infrared heating sample dyeing machine, the prepared working solution (penetrating agent JFC2g/L, a plurality of NaOH solutions, the bath ratio is 1:50) is added, and 5 steel balls with the diameter of 1cm are added.

A composite microfiber direct coating process comprises the following steps: unreeling release paper, coating waterborne polyurethane surface layer slurry on the release paper on a first coating table, drying in an oven, cooling, continuously coating waterborne polyurethane middle layer slurry on a second coating table, drying in the oven, cooling, continuously coating waterborne polyurethane adhesive layer slurry on a third coating table, adhering with base cloth, drying in the oven, cooling, separating the release paper from a composite microfiber finished product, rolling, printing on a surface, rubbing lines, trimming, sizing, inspecting, packaging and warehousing.

Precision coating for the first time: coating thickness of about 0.10-0.15mm, cooling and shaping after completely drying, and performing secondary precision coating: coating to a thickness of about 0.15-0.50mm, completely baking, and cooling for shaping; and (3) precision coating for the third time: controlling the coating thickness to be about 0.12-0.15mm, drying to be in a semi-dry wet state, attaching the ground by a laminating machine, drying and cooling in a three-furnace oven, finally carrying out coil splitting to obtain a finished product, and then carrying out three-plate treatment according to the process requirements of the product;

the three-plate treatment is to adopt a water-based treating agent to carry out the effects of brightening and delustering the surface of the leather or directly kneading patterns (dry kneading, according to the effect that the leather base cloth is shrunk into uniform and full patterns by temperature, the temperature is generally controlled to be about 60-70 ℃, the heating time is 30 minutes, and the leather is taken out to be finished and packaged to form a finished product).

By adopting a single-factor alternation method, the influence of the concentration, time and temperature of the alkali liquor for fiber opening on the alkali reduction rate of the fiber performance under the condition of mechanical action or not is examined, the result is shown in figure 1, and the alkali reduction rate of the fiber is increased along with the extension of the fiber opening time, the increase of the NaOH concentration and the increase of the temperature as can be seen from figure 1.

Under the same condition, steel balls are added into the steel cup, namely, the mechanical action is increased, and the fiber alkali reduction rate can be improved.

By adopting a single-factor rotation method, the influence of the concentration, time and temperature of the alkali liquor for fiber opening on the breaking strength of the fiber under the condition of mechanical action or not is examined, the result is shown in figure 2, as can be seen from figure 2, the breaking strength of the polyester-nylon composite superfine fiber is reduced along with the extension of the fiber opening time, the increase of the concentration of NaOH and the increase of the temperature, and the mechanical action is increased by adding steel balls into a steel cup under the same condition, so that the breaking strength of the fiber can be reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.