KR20210077224A - Eco-friendly artificial suede manufacturing method with improved flammability and wicking water-repellent performance - Google Patents

Abstract

The present invention relates to an eco-friendly artificial suede manufacturing method with excellent flame retardancy and wicking water repellency. More specifically, the present invention relates to an eco-friendly artificial suede manufacturing method with excellent flame retardancy and wicking water repellency, in which since a fabric is manufactured in the order of water-dispersed polyurethane impregnation, flame retardant impregnation, and non-fluorine water repellent impregnation, both flame retardancy and wicking water repellency can be maximized.

Description

Eco-friendly artificial suede manufacturing method with improved flammability and wicking water-repellent performance

The present invention relates to an eco-friendly synthetic suede manufacturing method having excellent flame retardancy and wicking water repellency, and to an eco-friendly artificial suede manufacturing method having excellent flame retardancy and wicking water repellency, which can exhibit excellent flame retardancy and water repellency by performing water repellency treatment after flame retardant treatment.

Suede synthetic leather is mainly impregnated with DMF (Dimethylformamide) or oil-based polyurethane resin mixed with organic solvent on the raised polyester fabric, and then compressed with a mangle. It is manufactured through additional processes such as buffing and printing fixing, which are washed with water and surface treated so that the appearance is similar to natural suede leather. This manufacturing method is a process for manufacturing wet suede synthetic leather manufactured by performing a coagulation process and a water washing process, and since such suede has excellent appearance and feel, it is widely used for clothes, shoes, gloves, etc.

In the prior art related to the production of suede manufactured in this way, there have been disclosed application numbers 10-2005-0123505, 10-2003-0006737, and 10-2005-0123505 filed with the Korean Intellectual Property Office.

However, when the suede is manufactured in this way, the process is complicated, there is a problem of water contamination by DMF extracted in the coagulation process and the water washing process, and there is a problem of worker safety and DMF remaining in the finished product. .

In addition, in the case of manufacturing water-repellent suede in the conventional manner, a fluorine-based water repellent agent is used during the production of suede, and since it is used by impregnating the fabric, there is a problem that it is harmful to the environment and the human body.

In addition, if the flame retardant treatment is performed after the water repellency treatment, there is a problem in that the water repellency is significantly deteriorated.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a method for producing suede excellent in flame retardancy and wicking water repellency, which can exhibit excellent water repellency and flame retardancy.

The eco-friendly artificial suede manufacturing method excellent in flame retardancy and wicking water repellency according to the present invention for achieving the above object is a water-dispersed polyurethane impregnation step of impregnating a raised fabric in a water-dispersed polyurethane impregnation solution, and the water-dispersed polyurethane impregnation step The first mangle step of adjusting the moisture content of the raised fabric to 40 to 80% by pressing the raised fabric impregnated with dispersed polyurethane, and the raised fabric compressed in the first mangle step through a dryer at 90°C to 110°C 5 - A first drying step of hot air drying for -10 minutes, a buffing step of buffing the raised fabric dried in the first drying step, a flame retardant impregnation step of impregnating the raised fabric buffed in the buffing step in a phosphorus-nitrogen-based flame retardant impregnating solution, A second mangle step of adjusting the moisture content of the raised fabric to 40 to 80% by compressing the raised fabric impregnated with the phosphorus-nitrogen-based flame retardant in the flame retardant impregnating step, the second mangle step drying the pressed raised fabric A second drying step of hot air drying hot air drying for 5-10 minutes at 90 ° C to 110 ° C through a water repellent impregnation step of impregnating the raised fabric dried in the second drying step in a non-fluorine water repellent mixture solution, a water repellent in the water repellent impregnation step A third mangle step of compressing the temporarily impregnated raised fabric to adjust the moisture content to 40 to 80%, a third drying step of drying the raised fabric compressed in the third mangle step with hot air at 110° C. for 3 minutes through a dryer, and It characterized in that it comprises a curing step of curing the raised fabric dried in the third drying step in a curing machine.

And the concentration of the water-dispersed polyurethane resin of the water-dispersed polyurethane impregnating liquid is 1 to 10 wt%, and the phosphorus-nitrogen-based flame retardant concentration of the phosphorus-nitrogen-based flame retardant impregnating liquid is 2 to 45 wt%.

In addition, the non-fluorine water repellent mixture solution is characterized in that it contains 12 parts by weight of a non-fluorine water repellent and 0.5 to 1 parts by weight of a water dispersion crosslinking agent with respect to 100 parts by weight of water.

As described above, according to the present invention, the eco-friendly artificial suede manufacturing method excellent in flame retardancy and wicking water repellency according to the present invention has the advantage that both flame retardancy and water repellency can be excellently imparted to the suede fabric by performing water repellency treatment after flame retardant treatment. .

In addition, there is an advantage in that both flame retardancy and water repellency can be maximized by optimizing the ratio of the water-dispersed polyurethane impregnating liquid, the flame retardant impregnating liquid, and the water repelling agent impregnating liquid.

In addition, since water-dispersed polyurethane and a non-fluorine-based water repellent are used, there is an advantage of being environmentally friendly compared to a process using an organic solvent.

1 is a flowchart of a method for manufacturing an eco-friendly artificial suede excellent in flame retardancy and wicking water repellency according to the present invention.
Figure 2 is a conceptual view of an eco-friendly artificial suede manufacturing method excellent in flame retardancy and wicking water repellency according to the present invention.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

Since the accompanying drawings are merely examples shown to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.

Prior to the detailed description of the present invention, in the present invention, the meaning of the term wicking refers to a phenomenon in which when the fabric is wet by a liquid, the liquid is absorbed through the yarn by capillary action and wet to the inside of the fabric.

1 is a flowchart of a method for manufacturing an eco-friendly artificial suede excellent in flame retardancy and wicking water repellency according to the present invention.

As shown in FIG. 1, the eco-friendly synthetic suede manufacturing method excellent in flame retardancy and wicking water repellency according to the present invention includes an aqueous dispersion polyurethane impregnation step (S100), a first mangle step (S200), a first drying step (S300), and buffing. Step (S400), flame retardant impregnation step (S500), second mangle step (S600), second drying step (S700), water repellent impregnation step (S800), third mangle step (S900), third drying (S1000) step and a curing step (S1100).

2 is a conceptual diagram of a method for manufacturing an eco-friendly artificial suede excellent in flame retardancy and wicking water repellency according to the present invention. Referring to FIG. 2, a method for manufacturing an eco-friendly artificial suede excellent in flame retardancy and wicking water repellency according to the present invention is described. First, a water-dispersed polyurethane impregnation step is performed.

The water-dispersed polyurethane impregnation step (S100) is a step of impregnating the polyester tricot raised fabric with a water-dispersed polyurethane impregnation solution, and the first impregnation bath 100 contains the water-dispersed polyurethane impregnation solution, and the tricot fabric It is impregnated with water-dispersed polyurethane. As water-dispersed polyurethane is used, there is no need to use a solvent, so that suede can be manufactured more environmentally friendly.

In this case, the water-dispersed polyurethane impregnating liquid preferably contains 1 to 10 parts by weight of the water-dispersed polyurethane resin with respect to 100 parts by weight of water. Limiting the content of this water-dispersed polyurethane resin is to maximize the flame retardancy of the flame retardant to be impregnated later. When the water-dispersed polyurethane resin is added in an amount of 10 parts by weight or more, in the excessively impregnated water-dispersed polyurethane Because combustion occurs, it is difficult to impart flame retardancy to the raised fabric. This will be described in detail in Experimental Example 2 below. And the water-dispersed polyurethane impregnated liquid prepared in this way can be used while controlling the concentration by adding water.

Next, the first mangle step ( S200 ) is performed. This is a step for adjusting the moisture content of the fabric to 40 to 80%, and is a step of pressing the raised fabric impregnated with the water-dispersible polyurethane in the water-dispersed polyurethane impregnation step (S100).

After that, the first drying step (S300) is performed. The first drying step 3100 is a step of drying the raised fabric compressed in the first mangle step S200 through the dryer 200 at 90° C. to 110° C. for 5-10 minutes with hot air. At this time, by using a steam dryer instead of a general hot air dryer, the suede feels softer. At this time, if the raised fabric is dried at a temperature of less than 90 ℃, there is a fear that the drying may not be done properly, and if the raised fabric is dried at a temperature exceeding 110 ℃, there is a fear that the raised fabric is damaged.

Next, a buffing step (S400) is performed. The buffing step (S400) is a step of buffing the raised fabric dried in the first drying step (S300) with the buffing machine 300. Through this, the suede fabric surface is uniformly raised and the surface of the fabric is made softer. .

Thereafter, a flame retardant impregnation step (S500) is performed to impart flame retardancy. The flame retardant impregnation step (S500) is a step of impregnating the raised fabric buffed in the buffing step (S400) in a phosphorus-nitrogen-based flame retardant impregnating solution. The phosphorus-nitrogen-based flame retardant impregnating liquid is contained in the secondary impregnation bath 400, and the nurtured fabric buffed in the buffing step is impregnated with the phosphorus-nitrogen-based flame retardant impregnated liquid. At this time, the phosphorus-nitrogen-based flame retardant is a flame retardant selected after a number of experiments as a flame retardant that can maximize flame retardancy in fabrics impregnated with water-dispersible polyurethane and non-fluorine water repellent.

In addition, the phosphorus-nitrogen-based flame retardant impregnated liquid preferably contains 40 parts by weight of the phosphorus-nitrogen-based flame retardant, 55 to 59 parts by weight of water, and 1 to 5 parts by weight of the nonionic dispersant. Such a composition ratio is the composition ratio of the flame retardant impregnating liquid in which the dispersed particle size of the flame retardant is uniform and precipitation does not occur during the process operation. When the phosphorus-nitrogen-based flame retardant is added in excess of 40 parts by weight, precipitation occurs in the impregnating solution, so that it is impossible to uniformly impart flame retardancy to the fabric. And the phosphorus-nitrogen-based flame retardant impregnated liquid prepared in this way may be used while controlling the concentration by adding water.

And, the concentration of the water-dispersed polyurethane resin of the water-dispersed polyurethane impregnating liquid used in the water-dispersed polyurethane impregnation step (S100) is 1 to 10 wt%, and the phosphorus-nitrogen-based used in the flame retardant impregnation step (S500) The concentration of the phosphorus-nitrogen-based flame retardant in the flame retardant impregnating liquid is preferably 2 to 45 wt%. This is because, as mentioned above, when the ratio of the water-dispersed polyurethane impregnating liquid increases, combustion of the water-dispersed polyurethane may occur and the flame retardancy may decrease. In this regard, it will be described in detail in Experimental Example 2 below.

Next, the second mangle step (S600) is performed. The second mangle step (S600) is a step for adjusting the moisture content of the fabric to 40 to 80%, similar to the first mangle step (S200), and is a step of compressing the raised fabric impregnated with a phosphorus-nitrogen-based flame retardant.

And a second drying step (S700) is performed. The second drying step (S700) is a step of hot air drying the raised fabric compressed in the second mangle step (S600) at 90°C to 110°C for 5-10 minutes through the dryer 200 like the first drying step (S300). to be.

After that, the water repellent impregnation step (S800) is performed. The water repellent impregnation step (S800) is a step of impregnating the raised fabric dried in the second drying step (S700) in a non-fluorine water repellent mixture solution, which is a step of imparting water repellency to the fabric. That is, it is a step of additionally performing a water-repellent coating on the semi-finished suede fabric. The non-fluorine water repellent impregnating liquid is contained in the tertiary impregnating bath 500, and the non-fluorine water repellent impregnating liquid is impregnated into the raised fabric dried in the second drying step (S700).

At this time, the non-fluorine water repellent liquid mixture is an aqueous dispersion, and preferably contains 12 parts by weight of a non-fluorine water repellent and 0.5 to 1 parts by weight of a water dispersion crosslinking agent based on 100 parts by weight of water. This mixing ratio is for maximizing flame retardancy, and when 12 parts by weight or more of the non-fluorine water repellent is added, combustion may occur due to the non-fluorine water repellent.

Next, the third mangle step (S900) and the third drying step (S1000) are performed. The third mangle step (S900) is a step for adjusting the moisture content of the fabric to 40 to 80%, similar to the first and second mangle steps (S600), and is a step of compressing the raised fabric impregnated with a non-fluorine-based water repellent agent.

In the third drying step (S1000), similarly to the first and second drying steps (S700), the raised fabric compressed in the third mangle step (S900) is heated with hot air at 90°C to 110°C for 5-10 minutes through the dryer 200. This is the drying step.

Finally, a curing step (S1100) is performed. The curing step is a step of curing the raised fabric dried in the third drying step (S1000) in the curing machine 500, preferably curing in the curing machine 500 at 145° C. to 155° C. for 10 minutes. This is a step to allow the water repellent to penetrate to the inside of the fabric to form a uniform water repellent film. At this time, if the curing temperature is less than 145°C, curing is not performed properly and the wicking water repellency is lowered, and when the curing temperature exceeds 155°C, there is a risk of discoloration of the suede fabric surface. Accordingly, it is possible to implement excellent wicking water repellency even in the suede brushed fabric with many voids.

Experiments on flame retardancy and wicking water repellency according to the flame retardant impregnation sequence, flame retardancy and wicking water repellency according to the content of water-dispersed polyurethane resin and flame retardant content were tested, and are shown in Experimental Examples 1 and 2 below.

<Experimental Example 1>

In this Experimental Example 1, flame retardancy and wicking water repellency were tested according to the flame retardant impregnation sequence.

In Example 1 of Experimental Example 1, the suede fabric according to the present invention was prepared in the order of water-dispersed polyurethane impregnation, non-fluorine water repellent impregnation, and flame retardant impregnation, and in Example 2, water-dispersed polyurethane impregnation, flame retardant impregnation, non-fluorine Suede fabric according to the present invention was prepared in the order of water repellent impregnation.

At this time, the water-dispersed polyurethane content of the water-dispersed polyurethane impregnating liquid is 2 wt%, the flame retardant content of the flame retardant impregnating liquid is 8 wt%, and the non-fluorine water repellent content of the non-fluorine water repellent impregnating liquid is 12 wt%.

The results of sealing the flame retardancy and wicking water repellency of the suede fabrics prepared according to Examples 1 and 2 are shown in Table 1 below.

Process order Example 1 Example 2 Process sequence number 1 polyurethane impregnating liquid
2 wt% polyurethane impregnating liquid
2 wt% Process number 2 Non-fluorine water repellent impregnating liquid
12wt% Flame retardant impregnating liquid
8wt% Process No. 3 Flame retardant impregnating liquid
8wt% Non-fluorine water repellent impregnating liquid
12wt% result flame retardant wicking water repellency flame retardant wicking water repellency

Good bad Good Good

As shown in Table 1, when impregnating the flame retardant after water repellency treatment as in Example 1, it was confirmed that the water repellency was poor, and as in Example 2, impregnating the water repellent after impregnating the flame retardant maximizes both flame retardancy and water repellency. know you can do it.

<Experimental Example 2>

In Experimental Example 2, flame retardancy and wicking water repellency were tested according to the content ratio of water-dispersed polyurethane and flame retardant.

In Example 3, the water-dispersed polyurethane content of the water-dispersed polyurethane impregnated liquid was 20 wt%, the flame retardant content of the flame retardant impregnated liquid was 40 wt%, and the non-fluorine water repellent content of the non-fluorine water-repellent impregnated liquid was 12 wt%, and carried out In Example 4, the water-dispersed polyurethane content of the water-dispersed polyurethane impregnated liquid was 10 wt%, the flame retardant content of the flame retardant impregnated liquid was 40 wt%, and the non-fluorinated water repellent content of the non-fluorinated water-repellent impregnated liquid was 12 wt%. And, in Example 5, the water-dispersed polyurethane content of the water-dispersed polyurethane impregnating liquid is 2wt%, the flame retardant content of the flame retardant impregnating liquid is 8wt%, and the non-fluorine water repellent content of the non-fluorine water repellent impregnating liquid is 12wt%. Suede was manufactured by the method for manufacturing suede according to the present invention, and the results of testing for flame retardancy and wicking water repellency are shown in Table 2 below.

Process order Example 3 Example 4 Example 5 Process sequence number 1 polyurethane impregnating liquid
20% polyurethane impregnating liquid
10% by weight polyurethane impregnating liquid
2% by weight Process number 2 Flame retardant impregnating liquid
40 wt% by weight Flame retardant impregnating liquid
40 wt% by weight Flame retardant impregnating liquid
8 wt% by weight Process No. 3 Non-fluorine water repellent impregnating liquid
12% by weight Non-fluorine water repellent impregnating liquid
12% by weight Non-fluorine water repellent impregnating liquid
12% by weight remark flame retardant wicking water repellency flame retardant wicking water repellency flame retardant wicking water repellency

bad Good bad Good Good Good

As shown in Table 2, in the case of Example 5, both the flame retardancy and the wicking water repellency were shown to be excellent, and the content of the water-dispersed polyurethane in the impregnated liquid of the dispersed polyurethane was 2 wt%, and the flame retardant content of the flame retardant impregnated liquid was 8 wt% , It can be seen that the non-fluorine water repellent content of the impregnated liquid is preferably 12wt%.

As described above, the eco-friendly synthetic suede manufacturing method having excellent flame retardancy and wicking water repellency according to the present invention has the advantage of maximizing both flame retardancy and wicking water repellency, and it is environmentally friendly because water-dispersed polyurethane and non-fluorine-based water repellent are used.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

100: primary impregnation bath
200: dryer
300: buffing machine
400: secondary impregnation bath
500: tertiary impregnation bath
500: hardener

Claims (3)

Water-dispersion polyurethane impregnation step of impregnating the raised fabric in water-dispersion polyurethane impregnation solution;
A first mangle step of compressing the raised fabric impregnated with water-dispersible polyurethane in the water-dispersible polyurethane impregnation step to adjust the moisture content of the raised fabric to 40 to 80%;
a first drying step of hot air drying the raised fabric compressed in the first mangle step at 90°C to 110°C for 5-10 minutes through a dryer;
a buffing step of buffing the raised fabric dried in the first drying step;
a flame retardant impregnation step of impregnating the raised fabric buffed in the buffing step in a phosphorus-nitrogen-based flame retardant impregnating solution;
a second mangle step of adjusting the moisture content of the raised fabric to 40 to 80% by compressing the raised fabric impregnated with the phosphorus-nitrogen-based flame retardant in the flame retardant impregnation step;
a second drying step of drying the raised fabric compressed in the second mangle step by hot air drying at 90° C. to 110° C. for 5-10 minutes through a dryer;
a water repellent impregnation step of impregnating the raised fabric dried in the second drying step in a non-fluorine water repellent mixture;
a third mangle step of compressing the raised fabric impregnated with the water repellent in the water repellent impregnation step to adjust the moisture content to 40 to 80%;
a third drying step of drying the raised fabric compressed in the third mangle step with hot air at 110° C. for 3 minutes through a dryer; and
A method for producing eco-friendly artificial suede excellent in flame retardancy and wicking water repellency, comprising a curing step of curing the raised fabric dried in the third drying step in a curing machine.
According to claim 1,
The concentration of the water-dispersed polyurethane resin of the water-dispersed polyurethane impregnating liquid is 1 to 10 wt%,
The phosphorus-nitrogen-based flame retardant impregnated liquid has a concentration of 2 to 45 wt% of the nitrogen-based flame retardant.
3. The method of claim 2,
The non-fluorine water repellent mixture solution contains 12 parts by weight of a non-fluorine water repellent and 0.5 to 1 parts by weight of a water dispersion crosslinking agent with respect to 100 parts by weight of water.

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