JP4227058B2 - Manufacturing method of thermoplastic artificial leather - Google Patents

Description

The present invention relates to a method for producing a thermoplastic artificial leather, and in particular, when a film is infiltrated and fixed to a base cloth in an unsaturated state, the finished product is hardly peeled off, has a uniform thickness, and has a beautiful and flexible surface. It is related to a method for manufacturing artificial leather that can provide excellent comfort because of its sufficient properties.
Taiwan Patent No. 442692 Japanese Patent JP2000-062125

As an early method for producing artificial leather, there is a method in which a liquid as an organic solvent is applied onto a release paper, and the release paper is peeled off after drying, which is generally called a dry method. As another known production method, a solution of a thermoplastic polymer compound is applied to the surface of a woven fabric or non-woven fabric, and a large number of holes are provided by a method called a wet solidification method or a dry solidification method. There is a method in which a thermoplastic polymer compound layer is formed, a resin solution containing a colorant is further applied on the compound layer, and a desired uneven surface is pressed with a roll after drying.
As described above, the method using a large amount of the organic solvent has the disadvantages that the environment is destroyed, and if the solidification method is adopted, it takes a long time and the layered structure is easily peeled off. Therefore, Taiwanese advertisement No. 442392 in Fig. 1 "High-strength thermoplastic polyurethane artificial leather manufacturing method" and Japanese Patent Publication 2000-062125 shown in Fig. 2, both of which are thermoplastic polyurethane (TPU) As a raw material, an artificial leather manufacturing method suitable for environmental protection is provided by forming a woven fabric or a non-woven fabric 13 into a film 14 by an extruder 11 and a calender roll 12.

However, the environmental protection type method as described above has the following drawbacks.
First, thermoplastic polyurethane (TPU) is fed through an extruder to a contact point of a roll (see 15 in FIG. 1) and a roulette roll (see 16 in FIG. 1) or a mirror surface roll. In the bonding of 13) in FIG. 1, the basic structure of the artificial leather is formed by controlling the contact between the roll and the roulette roll. In this method, the rate at which the thermoplastic polyurethane (TPU) is delivered is room temperature. Therefore, it is difficult to maintain a constant speed, the thickness of the formed film is difficult to be uniform, and the film after contacting the roll and the roulette roll is in a high temperature state. Therefore, it easily loses its shape due to its own gravity. In other words, it can be said that it is extremely difficult to keep the quality of the artificial leather good.
Thermoplastic polyurethane (TPU) becomes a film by being pressed onto a nonwoven fabric or woven fabric at a high temperature, so that TPU penetrates into the fibers of the nonwoven fabric or woven fabric in a saturated state and cures after cooling. The fibers of the woven and non-woven fabrics are cured accordingly, which gives the artificial leather a certain level of hardness and provides a comfortable fit that fits the body when worn as a product. It has the disadvantage that it cannot.
In addition, the TPU product has disadvantages such as weak physical properties and easy solubility in water, and poor stretchability. In addition, the TPU itself has the disadvantage that the viscosity is low and bubbles are generated unevenly.
Therefore, in view of these drawbacks, a method for producing a thermoplastic artificial leather of the present invention is provided in order to stabilize the quality including the flexibility and strength of the finished product, the beauty of the surface, etc., and at the same time provide comfort when worn.

  First, a thermoplastic polymer material and a colorant are mixed in preparation of a film raw material, a film is formed by an extruder, and then the film is formed on a metal guide roll of a calender roll, and then the metal guide roll is formed. After the heat of the film is cooled by setting the rotation stroke of 1 to 89 degrees to be evenly distributed, the film is further cooled to an appropriate temperature by the cooling system of the metal guide roll, and the film at the final application stage. In a non-saturated state, the material is infiltrated onto the base cloth on the guide roll and pressed.

  According to the present invention, the film is cooled to an appropriate temperature and then infiltrated and pasted in a non-saturated state on a base cloth, and the film quality is improved, and the film material is improved. Artificial leather has a porous structure that achieves the objective of simultaneously providing excellent surface texture and wear resistance.

As shown in FIG. 3, the present invention includes the following manufacturing process.
A. Preparation of Film Raw Material A thermoplastic polymer material and a colorant are used as blending materials, and after mixing these, a high-temperature film 20 is formed by an extruder. The thermoplastic polymer material is a plastic polyurethane elastic resin (TPU) + styrene butadiene rubber (SBR), or a plastic polyurethane elastic resin (TPU) + styrene ethylene butylene styrene (SEBS), or a plastic polyurethane elastic resin (TPU) + thermoplastic rubber. (TPR) or plastic polyurethane elastic resin (TPU) + artificial rubber (ethylene propylene diene monomer: EPDM), etc. In addition, in colorants, master batches and powders are used. The physical properties are improved, and the film 20 is formed into a porous material through cooling molding, and the surface texture is upgraded and at the same time the wear resistance is enhanced. Moreover, you may add a foaming agent to the raw material of such a film in order to strengthen the softness | flexibility after shaping | molding.
B. Molding of the film The film 20 is introduced onto the metal guide roll 31 of the calender roll 30, and the introduction position is within the range of the rotation stroke 310 of 1 to 89 degrees of the metal guide roll 31 as shown in FIG. In accordance with the constant rotation of the guide roll 31, the guide roll 31 is transported to a contact point with the guide roll 32. The guide roll 32 is made of metal, PVC, or the like suitable for the above-mentioned raw material. Further, the rotation stroke 310 of 1 to 89 degrees of the metal guide roll 31 is such that the contact point with the guide roll 32 is 0 degree and the vertex of the metal guide roll 31 is 90 degrees. By setting the rotation program mediated by the metal guide roll 31, the thickness of the film 20 becomes uniform, and in cooling the temperature, the cooling system 311 of the metal guide roll 31 controls how the film 20 is cooled. Control to an appropriate temperature. Although it is the cooling system 311, the temperature of the film 20 is directly controlled by injecting cooling water from the axis of the metal guide roll 31. However, the cooling water 311 is controlled by adjusting the flow rate of the cooling water or the water temperature. The purpose of cooling the temperature of the film 20 appropriately is achieved.
C. Attaching The film 20 cooled to an appropriate temperature is affixed onto a base fabric 40 which is a woven fabric or a non-woven fabric that the guide roll 32 sends out at a constant speed, as shown in FIG. The metal guide roll 31 and the guide roll 32 installed on the same horizontal plane are attached in a vertical state. Subsequently, as shown in FIGS. 5 and 6, the metal guide roll 31 and the guide roll 32 installed on non-identical water surfaces are used to perform a pasting operation in a non-vertical state. Then, as shown in FIG. 7, the base fabric 40 is stuck in a pressed form with the cooled film 20, and the adhesion between the two has a necessary degree of bonding. Since it is not a high temperature but a low temperature state, it does not penetrate into the base fabric 40 in a saturated state, and penetrates into the base fabric 40 in a non-saturated state. The base fabric 40 has good flexibility later, and even if the film 20 is pasted, it can provide flexibility and comfort, and the surface of the film 20 can be easily controlled to an optimum state even at a low temperature.
D. Surface treatment The surface of the film 20 is treated by performing a mirror surface treatment with the metal guide roll 31 or a roulette treatment to form a desired artificial leather surface.

In addition, since the metal guide roll 31 is hard and has a structure having heat exchange performance, the guide roll 32 only needs to have a recovery property, so that the metal guide roll 31 has a recoverability. A material having low hardness may be used, and the metal guide roll 31 and the guide roll 32 are different from each other in the technical scope of the present invention.
In addition to the rotation stroke 310 described above, the film 20 falls vertically to the metal guide roll 31 by the extruder as shown in FIG. 8, but the metal guide roll 31 is shifted by shifting the film 20 left and right. The rotation stroke 310 is reduced or enlarged within 1 to 89 degrees by adjusting the position of contact with the film, but by changing the angle of the extruder as shown in FIG. The position of the metal guide roll 31 falling vertically to the rotation stroke 310 may be changed.
Furthermore, in the control of the rotational speed value of the metal guide roll 31, the high temperature of the film 20 achieves a desired temperature by controlling the time in the rotation stroke 310 of the metal guide roll 31.

Figure 1 in Taiwan Notice No. 442392. It is a figure which shows the Example in Japanese Patent 2000-62125. In this invention, it is a figure which shows a mode that both guide rolls are installed in a horizontal surface, and affixing work is advanced. It is a local enlarged view of the metal guide roll in this invention. It is a figure which shows a mode that a calender roll is provided on a non-horizontal surface and progresses sticking operation | work in this invention. It is a figure which shows a mode that a calender roll is provided on a non-horizontal surface and progresses sticking operation | work in this invention. It is sectional drawing of the artificial leather manufactured by this invention. It is a figure which shows a mode that a film falls vertically from an extruder in this invention. It is a figure which shows a mode that the position of this film falling perpendicularly | vertically with an extruder in this invention is adjusted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Extruder 12 Calendar roll 13 Non-woven fabric 14 Film 15 Roll 16 Roulette roll 20 Film 30 Calendar roll 31 Metal guide roll 310 Rotating stroke 311 Cooling system 32 Guide roll 40 Base cloth

Claims (13)

In the manufacturing method of thermoplastic artificial leather including the processes of A. and B. and C.,
The process of A. in which a compound material composed of a thermoplastic polymer material and a colorant is mixed, and then a film raw material is prepared by feeding the film by an extruder;
The film is guided onto a metal guide roll of a calender roll, and the metal guide roll continuously rotates at a constant rotation stroke and is fed to a contact point with the guide roll, and the rotation stroke mediated by the metal guide roll. The process of B. in which the thickness of the film is uniformly distributed and the film is cooled at the same time, and the film is cooled by the cooling system of the metal guide roll, and the film is formed to control the temperature to a desired temperature. When,
The film cooled to an appropriate temperature is pasted on the cloth serving as the base of the guide roll, and the pasting method is a method of pressing the cloth serving as the base with the film. The process of C. for carrying out the pasting as artificial leather,
The manufacturing method of the thermoplastic artificial leather characterized by including. 2. The process for producing a thermoplastic artificial leather according to claim 1, wherein a foaming agent is added in the process A. The method for producing a thermoplastic artificial leather according to claim 1, wherein the artificial leather produced by the production method is made of a porous material. The process of B., wherein the film is guided onto a metal guide roll of a calendar roll, wherein the guiding position is controlled within a rotation stroke range of 1 to 89 degrees. A method for manufacturing thermoplastic artificial leather. 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the cooling system injects cooling water from an axis of the metal guide roll to serve as a constant temperature control means for the temperature of the film. In the production method, after pasting in the process of C.,
2. The method for producing a thermoplastic artificial leather according to claim 1 , wherein the artificial leather surface is formed by performing a surface treatment of the film by performing a mirror surface treatment with the metal guide roll or performing a roulette treatment. . 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the metal guide roll is a means for controlling a constant temperature of the film by a numerical value of a rotational speed. 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the thermoplastic polymer material is a plastic polyurethane elastic resin (TPU) and a styrene butadiene rubber (SBR). 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the thermoplastic polymer material is a plastic polyurethane elastic resin (TPU) and styrene ethylene butylene styrene (SEBS). 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the thermoplastic polymer material is a plastic polyurethane elastic resin (TPU) and a thermoplastic rubber (TPR). 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein the thermoplastic polymer material is a plastic polyurethane elastic resin (TPU) and an artificial rubber (ethylene propylene diene monomer: EPDM). 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein in the production method, the affixing operation is performed in a vertical state by a metal guide roll and a guide roll installed on the same horizontal plane. 2. The method for producing a thermoplastic artificial leather according to claim 1, wherein in the production method, the affixing operation is performed in a non-vertical state with a metal guide roll and a guide roll installed on non-identical horizontal planes.

Images