KR101676939B1 - Manufacture of synthetic suede method and thereby made synthetic suede - Google Patents

Abstract

To a method of manufacturing artificial suede and artificial suede produced thereby. The preparation of artificial suede according to the present invention comprises the steps of preparing a yarn of PTT (Terephthalic acid) or dimethyl terephthalate (DMT) and a PTT (Poly Trimethylene Terephthalate) fiber which is an axial polymer of 1,3-propanediol extracted from corn; A second step of knitting a PTT yarn; A third step of pretreating the knitted yarn; A fourth step of applying a dispersant to the pretreated yarn to improve the emulsification dispersion line and the shrinkability; And dyeing and post-processing the yarn having a high water-condensing property.

Description

[0001] The present invention relates to a method of manufacturing artificial suede,

The present invention relates to the production of artificial suede, and more particularly, to a method of manufacturing artificial suede capable of exhibiting texture and shape stability similar to natural suede, and artificial suede produced thereby.

In general, the global textile and apparel market has been focusing on the development of new technologies and new processes for lighter weight, high-performance fiber materials, as demand for high-grade and differentiated textiles continues to grow in line with income levels and lifestyle changes.

Recently, fashion trends repeated in the artificial leather market have emphasized raw materiality (raw material) and fine decor that emphasize delicate touches as if they are raw.

In order to artificially reproduce the structure and sensibility of natural leather, various attempts have been made for a long time and artificial leather was born to make synthetic leather similar to natural leather in terms of function and sensitivity, and today artificial leather It occupies almost every part of the leather-related area.

Korean Patent No. 10-0743988 discloses a manufacturing method of artificial suede. Forming a suede sheet; Forming a nonwoven fabric having a bristle layer on a surface thereof from staple fibers; Bonding the nonwoven fabric and the suede sheet to form a laminated sheet; And heating the laminated sheet to form a grain.

On the other hand, natural suede or artificial suede is applied to clothes, but natural suede is not easy to handle such as washing, and artificial suede has a disadvantage that dye fastness is extremely poor.

Disclosure of Invention Technical Problem [8] The present invention has been made in order to solve the problems of the prior art described above, and an object of the present invention is to provide a method for producing artificial suede, which can produce a micro- It is an object of the present invention to provide artificial suede manufactured by the method.

One embodiment of the present invention is a method for producing a yarn, comprising the steps of: preparing a yarn; A second step of knitting the yarn; 3) pre-treating the knitted yarn; Applying a dispersant to the pretreated yarn to improve emulsification and dispersibility and improve shrinkability; And dyeing and post-processing the yarn with improved shrinkability, the method comprising the steps of:
The raw material of the first stage is PTT (Poly Trimethylene Terephthalate) fiber which is an axial polymer of TPA (terephthalic acid) or DMT (dimethyl terephthalate) and 1,3-propanediol extracted from corn, having a fineness of 50 denier to 75 denier Yarn of any one of terephthalate / nylon split yarn (PTT / nylon) and nylon / polyester composite yarn (N / P)
In order to improve the shrinkage of the fourth step, the high-density shrinkage agent is prepared by mixing a dispersant prepared by mixing 2-phenyl alcohol and benzyl alcohol with an emulsifier and an additive in a concentration of 10% ows And is processed under the conditions of a bath ratio of 1:10, a processing temperature of 120 캜, and a processing time of 30 minutes.

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According to the present invention, different types of microdivided microspheres having different thicknesses are combined with environmentally friendly materials to give a sense of naturalness, and a high-density special processing is developed and applied to express shape stability and suede feel, and polyurethane is not used There is an effect that the problem of fastness due to migration occurring after dyeing processing can be solved and light weight can be achieved at the same time.

FIG. 1 is a flowchart illustrating a manufacturing process of an artificial suede according to an embodiment of the present invention.
2 is an exemplary view showing a manufacturing process of artificial suede according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It does not mean anything.

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator It should be noted that the definitions of these terms should be made on the basis of the contents throughout this specification.

FIG. 1 is a flowchart illustrating a manufacturing process of artificial suede according to an embodiment of the present invention, and FIG. 2 is an exemplary view illustrating a manufacturing process of artificial suede according to an embodiment of the present invention.

According to one embodiment of the present invention, a synthetic yarn of polytrimethylene terephthalate (PTT) fiber, which is an axial polymer of 1,3-propanediol extracted from terephthalic acid (TPA) or dimethyl terephthalate (DMT) (S1); A second step S2 of knitting a PTT yarn; (S3) of pretreating the knitted yarn; (S4) of applying the dispersing agent to the pretreated yarn to improve the emulsifying dispersion line and to improve shrinkability; (S5) of dyeing and post-processing a yarn having a high water-condensing property.

The yarn of step (S1) is a mixture of PTT / nylon and N / P or monofibers.

PTT is an eco-friendly material that can be the driving force of low carbon and green production field which is the global trend. It is a material that has merits of PET and nylon such as soft touch, high bulkability, high elastic recovery rate and stain resistance.

Therefore, it is applied and applied to the high shrinkage process technology, which is an indispensable process in the manufacture of suede, by applying the disadvantages and characteristics of PTT which is highly shrunk after PET / PTT or Nylon / PTT composite spinning.

The applied fineness of the yarn in the first step (S1) is from 50 denier to 75 denier.

The PTT / Nylon (75/24) 8 splitting / shrinking process is applied to the splitting / shrinking process technology which is a necessary process in manufacturing Suede. Establish process.

Recipe and process design for optimum refining / dividing / shrinking / washing / heat treatment process, and optimum preprocessing process condition by stepwise examination of continuous and batch process are selected.

We will establish a process considering environment, economical efficiency and workability, test each laboratory B / T and field by each process, and evaluate laboratory performance and stabilize on-site production.

Dyeing, processing and tumbler conditions are established by optimizing the dyeing processing process technology to maximize the raw materiality effect of PTT / Nylon (75/24) material and securing physical properties, and surface processing by brushing and Raising M / C.

It also performs laboratory B / T and field application tests, laboratory performance evaluation and on-site production stabilization.

 The PET / Nylon microfiber uses 75d / 48f and 50d / 48f 9 segment microfiber with PET: Nylon ratio of 7: 3. PTT / Nylon uses Dupont 'SORONA' raw material and 75d / 24f (5: 5) were used.

PTT has an intrinsic viscosity of 0.92Di / g which is much higher than that of general PET, which is similar to the viscosity of industrial high strength PET, but it has a low glass transition temperature and is characterized by severe spinning conditions.

The knit double structure was designed to give a sense of raw materiality. The table below shows the process conditions of the interlock, bamboo, and pile fabric.

 The interlock structure is also structurally composed of two ribs joined together, which is also called a double rib, and has a structure in which only the loop on the surface is visible and the loop on the back is shielded.

The balloons and pile roots are thicker than the interlocks, and have a double layer structure with an air layer between the front and back sides. The minute or interlock and needle arrangement are the same and can be regarded as a combination of the tubular structure and the interlocking structure.

The balloon structure is compact, stable and has excellent elasticity, and it can feel a sense of quality by forming a loops in a calm wavy shape.

It is similar to Sakariba in that it is similar to Sakariba. Unlike Sakariba, which has a single-step arrangement of needles, it has a two-tiered arrangement and is called cushion. It is usually made of spandex and knitted with a scuba suit. It is the organization that is used.

The washing and draining of the chamber before the pretreatment was thoroughly performed to completely remove the impurities such as the radial emulsion and the knitted emulsion so that the recycle ratio of the high density shrinkage agent can be increased and the shrinking force can be maintained constant.

Through the preprocessing period, the fractionation rate is about 30%, and it is possible to maximize the high shrinkage effect by progressing the division along with the contraction in the high-density section.

The high-density shrinkage agent was prepared by mixing 2-phenyl alcohol and benzyl alcohol with other additives such as emulsifier. The nylon and PET sample were produced by knitting machine according to the concentration of the processing agent. The change of the shrinkage rate of the fabric was confirmed and the optimum processing agent and processing concentration were selected.

Unlike PET, nylon is composed of strong hydrogen bonds between polymer chains. When a processing agent having a hydroxyl group in a polymer expanded by moisture and heat penetrates through a high-density shrinking process to form a new hydrogen bond with a fiber polymer, And the bonding force is weakened.

Therefore, the shrinkage phenomenon is more pronounced than the thermal shrinkage. As a result, it is confirmed that the nylon shrinkage is higher than that of PET. Respectively.

In the case of Nylon / PET and Nylon / PTT split yarns, the nylon shrinkage force of the core part totally influenced, and as the core shrinks, the PET of the sheath part which is relatively low in shrinkage makes it possible to further split processing by this shrinkage phenomenon .

In PET and Nylon, fiber shrinkage occurred at less than 10% of processing agent concentration, and benzyl alcohol was selected for better environmental and human health.

The sedimentation phenomenon due to the lack of dispersibility of high shrinkage processing agent is formulated by emulsifying agent and dispersing agent so as to have excellent storage stability through cooperation with the processing agent manufacturer so that the same processing effect can be obtained during the technology development .

Therefore, the shrinkage test was conducted at a fixed concentration of 10% ows, a bath temperature of 1:10, a processing temperature of 120 ° C, and a processing time of 30 minutes in order to select a product exhibiting excellent dispersion stability and long shrinkage characteristics during long- The high density shrinkage rejection T1 was selected by confirming dispersion stability and fabric texture.

Due to the high shrinkage process, the three - dimensional interlocking structure due to the knitting structure sharply contracts to increase the entanglement between the fibers, and the interfiber porosity decreases.

The nylon of the core portion shrinks sharply due to the high-density shrinkage process, and the loops of the relatively low-shrinkage PET portion protrude to the surface of the fabric, which is an important factor in expressing the sensibility as a natural shade in the sanding process .

We have developed a material with excellent air permeability which can not be obtained in shade with optimal touch feeling and PU by varying the concentration of high shrinkage processing agent. We sought to find the optimum process condition by confirming thickness, weight, shrinkage rate and shape.

<PET / Nylon Interlock>

The change of area shrinkage rate was checked by varying the concentration in order to select the optimum concentration. The results are shown in the table below (temperature 120 ° C, time 30 minutes)

The shrinkage rate changes linearly with the concentration of the high shrinkage agent. The concentration of the shrinkage agent was determined according to the application of the final product, and the process conditions were fixed.

In case of PTT / Nylon, there was not much change after a certain processing time. Therefore, except for factors related to the processing time, the area shrinkage rate was confirmed by varying the concentration of the shrinkage agent and the process temperature.

Particularly, the PTT has strong shrinkage characteristics due to heat, so it is confirmed that the shrinkage rate is 28.5% in the pretreatment process compared with PET / Nylon.

PET microfiber is increasing in the number of apparel products. As the fiber tends to increase, the surface area of the fiber per unit weight increases. Therefore, the dyed dye is likely to be desorbed during washing, and after heat treatment, The phenomenon of thermo migration in which the dyed dye leaves the fiber surface is also remarkable, which results in poor washing fastness.

Therefore, in this developed fabric, the dyeing speed was lowered in the low temperature region and the IR dyeing machine was set so that the stirring speed was fast and the pores of the high density fabric were small and the dye was hardly penetrated between the fibers.

In dyeing process, dyeing was proceeded by addition of leveling agent and penetrating agent, because dye adsorption on the fiber surface and dye transfer between fibers are important factors for dyeing unevenness.

For the selection of the dyes, the dyes used in the first year were tested for E type, SE type, and S type dyes which are mostly used in the field (Oh Young Industrial Co., LTD).

PET and PTT are known to have similar dyeing characteristics. In the first year, PTT / Nylon interlocking fabric was used to identify the dyeing conditions for each dye because there are many researches and field work DBs for dyeing characteristics of PET.

1% owf, a bath ratio of 1:15, a dispersing agent of 0.5 g / l, a penetration agent of 0.5 g / l and a buffer of 2 g / l using a dyed curve measuring instrument (DyeMax-L system, Dyeing was performed using a staining program (DTC-6000) and the change in the concentration of the real-time dye was analyzed by a UV-spectrometer to measure the adsorption rate.

On the other hand, the brushed process which makes suede effect and finally determines the appearance and quality of the product can be roughly divided into a process using a cloth and a process using a brush or a sand paper.

The important factors in the brick process are the napped density, the uniformity of the napping length and the napping, the lower the napping density, the lower the napping density, and the napping density is influenced by the fiber density and uniformity of the brushed fabric have.

We tried first and second processing by changing the grain size of the sandpaper. The first buffing was done to make the finish uniform, and the second buffing was performed to obtain a good napping effect.

We tried to express the best sensibility by varying the degree of brushed depending on the feeding speed of the fabric, the rotating speed of the sandpaper, and the contact area.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

S1: Step 1 S2: Step 2
S3: Step 3 S4: Step 4
S5: Step 5

Claims (4)

Step 1 for preparing the yarn; A second step of knitting the yarn; 3) pre-treating the knitted yarn; Applying a dispersant to the pretreated yarn to improve emulsification and dispersibility and improve shrinkability; And 5) dyeing and post-processing the yarn with improved shrinkability. In the method for producing artificial suede,
The raw material of the first step may be PTT (Poly Trimethylene Terephthalate) fiber which is an axial polymer of TPA (terephthalic acid) or DMT (dimethyl terephthalate) and 1,3-propanediol extracted from corn, having a fineness of 50 denier to 75 denier Yarn of any one of terephthalate / nylon split yarn (PTT / nylon) and nylon / polyester composite yarn (N / P)
In order to improve the shrinkage of the fourth step, the high-density shrinkage agent is prepared by mixing a dispersant prepared by mixing 2-phenyl alcohol and benzyl alcohol with an emulsifier and an additive in a concentration of 10% ows And is processed under the conditions of a bath ratio of 1:10, a processing temperature of 120 캜, and a processing time of 30 minutes.
delete delete An artificial suede produced by the manufacturing method according to claim 1.

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