KR101333133B1 - Manufacturing method of leathers using the leather byproducts - Google Patents

Abstract

The present invention relates to a method for manufacturing leather fabric using a leather byproduct, more specifically, to a method for manufacturing leather fabric using a leather byproduct, wherein the method reduces manufacturing processes and manufactures environment-friendly leather by integrally attaching waste leather to fiber in a solvent through water-soluble impregnation method instead of using synthetic resin and organic solvent used in an existing adhesion method using a technique for integrally attaching waste leather to synthetic resin. [Reference numerals] (1) Orthogonal conversion unit;(10) Group decoding delay determination unit;(11) Group decoding delay information addition unit;(12) Output time determination unit;(13) Group output time calculation unit;(2) Quantization unit;(3) Entropy encoding unit;(4) Encoding quantity control unit;(5) Quantization quantity calculation unit;(6) Buffer occupation calculation unit;(7) Group determination unit;(8) Decoding view point determination unit;(9) Group decoding view point calculation unit;(AA) Video image encoding device;(BB) Filler addition unit;(CC) Encoding processing unit;(DD) Group information addition unit;(EE) Group output delay information addition unit;(FF) Group output delay determination unit;(T1) Bit counter;(T2) Group configuration determination unit

Description

Manufacturing method of leather fabrics using leather by-products {Manufacturing method of leathers using the leather byproducts}

The present invention relates to a method for manufacturing a leather fabric manufactured by using a leather by-product, and more particularly, to a method for manufacturing a leather fabric manufactured by a technique of integrally adhering simultaneously with fibers using natural waste leather as a raw material. .

Generally, the waste of natural leather is about 50% based on the raw material skin, but although the large amount of waste can be a valuable resource, it is mostly incinerated or disposed of as industrial waste without recycling. Secondary pollution caused by odors and sewage leaks, which acts as a harmful factor to human health, is a very serious environmental problem, as well as an excessive disposal cost (4 ~ 60,000 won / ton) for waste. It is a rising factor for cost.

Therefore, in recent years, waste leather of natural leather is collected and pulverized, and the technology and leather file for manufacturing artificial leather by bonding and processing the pulverized waste leather raw material using a synthetic resin adhesive, etc. In general, techniques related to manufacturing artificial leather by planting in) are known.

Thus, looking at the prior art of manufacturing a conventional artificial leather,
Korean Patent Publication No. 10-1022828 (Manufacturing Method, Manufacturing System, and Dry Synthetic Leather Fabric of the Synthetic Leather Fabric, 2011.03.09) includes Combined synthetic leather sheet constituting the base, dry synthesis comprising the step of forcibly discharging the gas that can be generated when the two materials are combined by applying heat to the synthetic resin sheet and synthetic leather sheet for the outside to the outside It relates to a method for manufacturing a leather fabric, a manufacturing system and a dry synthetic leather fabric produced thereby.
However, in the above technology, it is manufactured through many steps when combining synthetic resin and synthetic leather sheet, which takes a long time in the process, and includes many curing steps and hot rolling steps of adhesive synthetic resins. The adhesive must be used, and the phenomenon of product hair loss occurs, so it is necessary to improve the research.

However, as described above, when the pulverized waste leather is mixed with a binder, difficulty in homogeneous mixing due to agglomeration occurs, so that the surface of the manufactured artificial leather is coarse and agglomeration occurs, so that beautiful surface processing is not easy. In the case of artificial leather manufactured by the method of planting the leather pile on the base material, it is known that the leather piled of the leather is easily depilated from the base, and thus has a very weak durability. .

Conventionally, in the case of reinforcement leather or natural leather-like material, first, the leather-based material is processed using waste leather, and then it is processed and processed using an organic solvent such as solvent or synthetic resin adhesive. It is harmful to the process, and the process procedure is very complicated, which makes it difficult for cost and work efficiency.

In the case of such leather-like materials, even after the imbalance and color unevenness occurs, and since the adhesive layer is formed by a separate adhesive treatment, there is a disadvantage that the leather fabric becomes hard because of the loss of breathability, bags, sofas, furniture, It has a problem that it is not used in large quantities, such as shoes, and also has a problem in that it is not only easy to deform in the case of foreign products, but also harmful due to chemical treatment.

Moreover, it is a very serious environmental problem because it acts as a factor that is harmful to human health by generating secondary pollution caused by bad smell and sewage leakage caused by illegal dumping due to organic waste as it is highly perishable. have.

Therefore, the present invention is to solve the conventional problems as described above, by using the natural waste leather as a raw material and the technology of bonding integrally at the same time, without using the synthetic resin and organic solvent used in the conventional bonding method It is a water-soluble impregnation method that is an eco-friendly material, which has the characteristics of shortening the manufacturing process and manufacturing eco-friendly leather by attaching waste leather and fiber in one body at the same time. It has breathability to the leather fabric to maintain the natural texture and softness of the leather, good filling and elasticity, and it is harmless to human body by using water-soluble material which is an eco-friendly material. Providing a method of manufacturing the leather fabric manufactured using the leather by-products Intended.

As described above, by using the method of manufacturing the leather fabric produced by using the leather by-product according to the present invention without using synthetic resin and organic solvent used in the conventional adhesive method in the waste leather in a solvent by water-soluble impregnation method which is an environmentally friendly material It has the effect of shortening the manufacturing process and manufacturing eco-friendly leather by attaching and fiber together integrally.

It does not go through a separate adhesive process and has a breathability to the leather fabric, and it is harmless to human body by using the material which is soft and eco-friendly, and it has economical effect by using it in various materials by improving cost saving and work efficiency.

1 is a flow chart of a method for manufacturing leather fabric using the leather by-product of the present invention
Figure 2 is a leather fabric manufacturing process using the by-product of the present invention
3 is an exemplary cross-sectional view of a leather fabric manufactured using the leather by-product of the present invention.

The present invention is made of natural waste leather as a raw material and simultaneously bonded integrally with synthetic fiber, without using synthetic resin and organic solvent used in the conventional bonding method, waste leather and fibers in solvent by water-soluble impregnation method which is an environmentally friendly material It has the characteristic of shortening the manufacturing process and manufacturing eco-friendly leather by attaching it integrally at the same time. First, there is no adhesive layer because it does not go through a separate bonding process. The method of manufacturing a leather fabric manufactured using leather by-products manufactured to be used in various materials by maintaining water, good filling feeling and elasticity, and harmless to the human body by using water-soluble materials that are eco-friendly materials and improving cost efficiency and workability It is to provide.

Embodiments of the invention may be modified in many different forms and should not be construed as being limited to the scope of the invention by the embodiments described below.

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

Method of manufacturing leather fabric using leather by-products

Figure 1 shows a flow chart of the leather fabric manufacturing method using the leather by-product of the present invention, Figure 2 shows a manufacturing process of the leather fabric using the leather by-product of the present invention, it will be described in detail as follows.

Leather fabrication method using leather by-products is largely a three-step process, and in the first step, natural waste leather is used for blending chemicals, adding adhesives and flocculants to use waste leather as a raw material. In the second step, the fiber is used to prepare the fiber impregnated with the impregnant by mixing the fiber with the impregnant, and in the third step, the waste leather material (A) and the impregnant prepared in the first and second steps, respectively, are prepared. The impregnated fiber (B) is transferred to a wire mesh to be laminated, pressed, dried, calendered, and wound to provide a leather fabric manufactured using the leather by-product of the present invention.

1) In the first step, the process of blending chemicals, adding adhesives and flocculants using natural waste leather, and describing in detail the process of preparing waste leather as a raw material,

First, 20% by weight of waste leather, which is automatically sucked in the process of pulverizing natural waste leather, and 80% by weight of water are mixed and ground through a Hamma mill, and then passed through a screen net. + First grinding (1) process to create water, LW),

After the first grinding (1) process, by further adding water to the raw material to adjust the concentration at a ratio of 10% by weight of waste leather and 90% by weight of water, using a double disk (D, D, R) grinding treatment Secondary grinding (2) process to pass through the vibrating screen to form a smooth and fine raw material (waste leather + water, LW),

After transferring the raw materials (waste leather + water, LW) which have undergone the first and second grinding processes to the mixing tank (T1), water is further added to increase the concentration at a ratio of 5% by weight of waste leather and 95% by weight of water. After adjusting to pH 5.8 to 6.0 with soda ash (sodium carbonate), 20% to 15% by weight of synthetic oils were added to the total weight ratio of the raw materials (waste leather + water, LW), and then 20 In the first chemical formulation (3) proceeding by stirring for a minute, the type of strength is shown in Table 1 according to the input amount of the synthetic products.

Type of strength depending on the amount of compound Dose of Synthetic Type of strength 2 wt% Hard type 5 wt% Midium type 10 wt% Soft type 15 wt% Very soft type

After the primary chemical compounding process (3) to proceed by stirring, to adjust the color by adding a dye to the mixing tank (T1), in order to adjust the strength and physical properties, the secondary chemical compound to process the strength and physical properties control chemicals (4) As a process,

The strength and property control chemicals should be used as follows according to their type.

① Base treatment before NR Latex (directly imported Thailand, Vietnam) adhesive: Used to increase tensile strength and soft ② ② Base before synthetic Latex (Kumho Petroleum 106) adhesive: Used to increase tensile strength and hard ③ ③ Acrylic Binder (Tamchem 308 Korea) Before adding adhesive: For base: Raise tensile strength and use for very hard.

The raw material of the adhesive (NR Latex 60%) dissolved by mixing 90 kg to 97 kg of water and 3 kg to 10 kg of NR Latex in a total amount of 100 kg in the mixing tank T1 that has undergone the primary and secondary chemical mixing (3, 4). In the process of adhesive injection (5) to spray injection at 10% by weight relative to the total weight ratio of (waste leather + water, LW),

Since the tensile strength is changed according to the amount of adhesive injected during injection, the injection amount of adhesive can be produced according to the customer's requirements as shown in Table 2.

Tensile strength changes according to the amount of adhesive Mixing ratio + Tensile strength change when 10 wt% is added to mixed raw materials- > 0.6mm thickness Water 97kg + NR Latex 3kg 0.2 kgf㎡ Water 95kg + NR Latex 5kg 0.3 kgf² Water 93kg + NR Latex 7kg 0.5 kgf² Water 90kg + NR Latex 10kg 0.8 kgf²

10% by weight of flocculant, based on the total weight ratio of the raw materials (waste leather + water, LW), using a flocculant dissolved in 195 kg of water and 5 kg of 7% aluminum sulfate in the mixing tank T1 subjected to the adhesive (5) process. After the addition, as a flocculant (6) process for coagulation and dehydration, natural waste leather is prepared to be used as raw material (A) in the mixing tank (T1) through grinding, chemical mixing, adhesive, and flocculant process. do.

2) In the two-step process to explain in detail a series of processes for preparing the fiber (B) impregnated with the impregnant by blending the fiber using the fiber,

First, 60% NR Latex, water, and aluminum sulfate were prepared in a ratio of 1: 1: 3 by weight as a raw material of the impregnant to be used for the fiber, and 60% NR Latex and water were added to the prepared raw material in the impregnation tank (T2). After blending, aluminum sulfate is added and mixed to prepare an impregnation tank (T2).

The impregnated agent is impregnated with fiber for 5 minutes to allow the impregnant to penetrate and adhere, and then transfer to the next step, step 3.

3) The third step is to transfer the wire leather (8) using the waste leather material (A) and the impregnated fiber (B) prepared in the first and second steps, respectively, to the process of lamination, pressing, drying, calendering and winding. In detail, a series of processes in which a leather fabric (C) manufactured using the leather by-product of the present invention is provided will be described in detail.

By transferring the waste leather material (A) prepared in step 1 and the impregnated fiber (B) prepared in step 2 to the continuously moving wire mesh (8),

First, by spraying the waste leather raw material (A) prepared in the mixing tank (T1) in the first step with a continuously moving wire mesh (8) on the waste leather raw material (A) flowing to the wire mesh (8),

By combining the impregnated fiber (B) prepared in step 2, proceeds to the process of laminating the waste leather and fibers (9) to produce the waste leather raw material (A) and the fiber (B) in one piece,

At this time, the waste leather raw material (A) and the impregnated fiber (B) causes agglomeration reaction in the wire mesh part to be dehydrated and forced dehydration using a vacuum brower.

Referring to another embodiment in the process of lamination (9) of the waste leather and fibers as described above,

 (1) Waste leather raw material by incorporating the impregnated fibers (B) onto the waste leather raw material (A) flowing into the wire mesh 8 by spraying the waste leather raw material (A) with a continuously moving wire mesh (8) (A) and the process of laminating the leather and fibers (9) to produce the fiber (B) in one piece (Fig. 3-1)

(2) The fiber (B) impregnated on the continuously moving wire mesh (8) is first spread, and the waste leather material (A) is sprayed on the fiber (B) to separate the fiber (B) and waste leather material (A). Lamination of waste leather and textiles produced in one piece (9) Process (3-2)

(3) The impregnated fiber (B) is bonded onto the waste leather material (A) flowing into the wire mesh (8) by spraying the waste leather material (A) with the continuously moving wire mesh (8), and the fiber (B). Again, the waste leather raw material (A) is sprayed again, the waste leather raw material (A), the fiber (B), the waste leather and the paper (9) process of the waste leather produced as a single body (A) (FIG. 3) -3) to select and use.

After the process of laminating the waste leather and the fiber 9, the process of pressing 10 to determine the density control and the thickness control to maintain the natural softness, and may have a second, third compression if necessary.

Table 3 below shows the deformation of the laminated leather fabric thickness after compression.

Deformation of the thickness of laminated leather fabric after pressing Vacuum dewatering process thickness After vacuum dewatering 1.5mm After the first crimp 1.2 mm After the second crimp 1.0 mm After 3rd compression 0.9mm

After the crimping (10) process, the compressed leather fabric is connected to a drying system, and the drying (11) process of drying and controlling the drying temperature and humidity according to the thickness and drying speed of the leather fabric, the thickness of the leather fabric 0.8 ~ 1.5 In order to maintain mm, the drying speed is 7 ~ 10 (m / m), the drying temperature is 89 ~ 127 ℃, and the drying station is a reciprocating drying system with a total length of 50m and installed 7.5 hot air blowers for 16 hot air drying. Hot air-drying with the device causes a lot of shrinkage and deviation depending on the thickness of the leather fabric (see Table 4).

Shrinkage result according to drying speed and drying temperature depending on the thickness of leather Thickness standard Speed (m / m) Primary temperature Secondary temperature Tertiary temperature Shrinkage 1.5mm 7 112 ℃ 120 DEG C 127 ℃ → 5% shrink 1.0 mm 9 105 ℃ 112 ℃ 120 DEG C → 7% shrink 0.8mm 10 89 ℃ 97 ℃ 108 ° C → 10% shrink

After the drying (11) process of the compressed leather fabric, the shrinked and dried leather fabric is ironed with a calendering machine to proceed to the calendering (12) process of adjusting the smoothness thickness of the surface of the leather fabric again.

After the calendering (12) process, the leather fabric (C) using the leather by-products is manufactured by winding the leather fabric (winder) and winding it well (13).

By using the leather fabric (C) prepared as described above, the surface coating, if necessary, inspected and packaged to be used as a product.

A: Waste leather raw material B: Impregnated fiber C: Leather fabric
T1: Mixing Tank T2: Impregnation Tank

Claims (5)

Leather fabrication method using the by-products of leather is a three-step process,
1) In the first step, the process of preparing waste leather raw material (A) proceeds through the process of grinding, chemical formulation, adhesive and flocculant using natural waste leather, and preparing to use waste leather as raw material,

2) In the second step, the impregnated fiber (B) preparation process for preparing the impregnated fiber impregnated with the impregnating agent in the fiber using the fiber,

3) The three-stage process is transferred to the wire mesh using the waste leather raw material (A) and the impregnated fiber (B) prepared in the first and second stages, respectively, and the fiber (B) impregnated with the waste leather raw material (A) and impregnant. Method of manufacturing a leather fabric manufactured by using the leather by-products, characterized in that at the same time integrally laminated, pressed, dried, calendering, winding process to produce a leather fabric (C)
The method of claim 1,
1) In the first step, the process of preparing waste leather raw material (A) which proceeds to the process of crushing, mixing drugs, adding adhesive and flocculant using natural waste leather, and preparing to use waste leather as raw material,
First, in the process of pulverizing natural waste leather, 20% by weight of waste leather and 80% by weight of water are mixed and pulverized through a hamma mill, and then passed through a screen net to feed the raw material (waste leather + water, LW). Primary grinding (1) process to form

After the first grinding (1) process, by further adding water to the raw material to adjust the concentration at a ratio of 10% by weight of waste leather and 90% by weight of water, using a double disk (D, D, R) grinding treatment Secondary grinding (2) process to pass through the vibrating screen to form a smooth and fine raw material (waste leather + water, LW),

After transferring the raw materials (waste leather + water, LW) which have undergone the first and second grinding processes to the mixing tank (T1), water is further added to increase the concentration at a ratio of 5% by weight of waste leather and 95% by weight of water. After adjusting to pH 5.8 to 6.0 with soda ash (sodium carbonate), 20% to 15% by weight of synthetic oils were added to the total weight ratio of the raw materials (waste leather + water, LW), and then 20 The first chemical mixing process (3) proceeding by stirring for a minute,

After the primary chemical compounding (3) process, in order to adjust the color by adding a dye to the mixing tank (T1), and to adjust the strength and physical properties, for the strength and physical properties of one selected from NR Latex, synthetic Latex, acrylic binder The second drug combination (4) process to process the drug,

The raw material of the adhesive (NR Latex 60%) dissolved by mixing 90 kg to 97 kg of water and 3 kg to 10 kg of NR Latex in a total amount of 100 kg in the mixing tank T1 that has undergone the primary and secondary chemical mixing (3, 4). (5) the process of the adhesive injection (10) by spraying at 10% by weight relative to the total weight ratio of (waste leather + water, LW),

10% by weight of flocculant based on the total weight ratio of the raw materials (waste leather + water, LW) by using a flocculant dissolved in 5% of 7% aluminum sulfate in 195kg of water in the mixing tank (T1) subjected to the adhesive (5) process. A method of manufacturing a leather fabric manufactured using leather by-products , which is prepared as a waste leather raw material (A) in the mixing tank (T1) as a flocculant (6) process of coagulation and dehydration after the addition. The method of claim 1,
2) In the second step, the impregnated fiber (B) preparation process of preparing the fiber impregnated with the impregnant by blending the fiber with the impregnated fiber,
First, 60% NR Latex, water, and aluminum sulfate were prepared in a ratio of 1: 1: 3 by weight as a raw material of the impregnating agent to be used for the fiber, and then mixed with 60% NR Latex and water in the impregnation tank (T2). After adding and mixing aluminum sulfate, it is prepared in the impregnation tank (T2),
Impregnating the blended impregnant for 5 minutes to make the impregnant penetrates, adheres to prepare the fabric by using the leather by-products, characterized in that to prepare to use the impregnated fiber (B). The method of claim 1,
3) The third step is to transfer the waste leather raw material (A) and the fiber (B) impregnated by transferring to the wire mesh using the waste leather raw material (A) and the impregnated fiber (B) prepared in step 1 and step 2, respectively. At the same time, it is integrated into the process of laminating, pressing, drying, calendering and winding to manufacture leather fabric (C),

On the waste leather raw material (A) flowing to the wire mesh 8 by spraying the waste leather raw material (A) prepared in the mixing tank (T1) to the continuously moving wire mesh (8) in the first step,
By combining the impregnated fiber (B) prepared in step 2, the waste leather and fiber (9) process of manufacturing the waste leather raw material (A) and the fiber (B) as an integral, and
After the process of laminating the waste leather and the fiber (9), the compression (10) process of the first to third compression by pressing to determine the density control and the thickness control in order to maintain the natural softness,

After the crimping (10) process, in order to maintain the leather fabric thickness 0.8 ~ 1.5mm by connecting the compressed leather fabric to the drying system, the drying speed is 7 ~ 10 (m / m), drying temperature is 89 ~ 127 ℃ (11) the process of drying to proceed in

After the drying (11) process of the crimped leather fabric, the process of calendering (12) for ironing the shrinked and dried leather fabric with a calendering machine to adjust the smoothness of the surface of the leather fabric again;
After the calendering (12) process, by winding the leather fabric (winder) through a winding (13) process, the leather fabric (C) using the leather by-product is manufactured using a leather by-product, characterized in that Method of manufacturing leather fabric 5. The method of claim 4,
In the process of lamination of waste leather and fiber (9),
First, the fiber (B) impregnated on the continuously moving wire mesh (8) is laid first, and the waste leather material (A) is sprayed on the fiber (B) to fabricate the fiber (B) and the waste leather material (A) in one piece. The impregnated fiber (B) onto the waste leather raw material (A) flowing to the wire mesh (8) by spraying the waste leather raw material (A) with a process of lamination of the waste leather and the fiber (9) or a continuously moving wire mesh (8). ), The waste leather (A) is sprayed on the fiber (B) again, and the waste leather and the fiber (A), the fiber (B) and the waste leather (A) are integrally manufactured. Leather fabric manufacturing method using the leather by-products, characterized in that can be used to select the (9) process of

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