KR100729957B1 - Wallpaper for automobile and manufacturing method - Google Patents

Abstract

Nonwoven interior materials for a vehicle and a method for manufacturing the same are provided to reduce the manufacturing cost of the nonwoven interior materials, by performing a heat-setting process of a fiber at low temperature. An amorphous polyester monofilament is manufactured by heat-setting of the polyester at low temperature during a monofilament manufacturing process for nonwoven fabric. Nonwoven felt is manufactured using the manufactured polyester monofilament. The nonwoven felt passes between heat press rolls at high temperature and high pressure during a heat-treating process of the nonwoven felt.

Description

Automobile nonwoven fabric interior material and its manufacturing method {Wallpaper for automobile and manufacturing method}

1 is a block diagram and a perspective view of the manufacturing process of the short fibers constituting the nonwoven fabric

Figure 2 is a process cross-section consisting of two to four heat press rolls of high temperature and high pressure

Photo 1 shows an electron microscope image of a 50 times magnification of a normal printed nonwoven fabric.

Photo 2 is an electron micrograph of 50 times the surface of the HD printed nonwoven fabric according to the present invention

The present invention produces a thermally unstable amorphous special fiber through a process of down-regulating the heat setting temperature during the manufacture of the polyester short fibers constituting the nonwoven fabric, and a non-woven fabric by mixing a predetermined amount of the thermally unstable amorphous special fiber The present invention relates to a nonwoven fabric interior material for automobiles produced through a process of heat-treating with a high temperature and high pressure heat press roll, and a method of manufacturing the same.

In the printing process of the nonwoven fabric used in the interior materials of automobiles in the past, binders are bonded to needle-punched or water-bonded short-fiber felt. As the surface smoothness is low, when printing a fine and fine pattern on the surface, the print liquid is absorbed into the nonwoven fabric by the surface irregularities, and the shape of the pattern is crushed. .

As a technique disclosed with respect to the manufacturing of a nonwoven fabric for automobiles in the prior art, a method of improving the design of the surface by the methods of the Republic of Korea Patent No. 041545 and Patent No. 0533806 has been proposed, in the case of Patent No. 041545 It is proposed to diversify and enhance the design of the surface by printing on the surface with two or more patterns and colors, and in the case of Patent No. 0533806, a specific amount of a special blowing agent is mixed in the printing liquid in printing on the surface of the nonwoven fabric. The method of forming a three-dimensional effect on the surface of the nonwoven fabric by foaming in the drying process by the printing process to improve the surface of the nonwoven fabric is disclosed. There is a problem that has not been improved.

The technical problem to be achieved by the present invention is to solve the problems of the prior art as described above, in the manufacture of automotive nonwoven fabric interior materials, first, the surface of the nonwoven felt obtained by conventional needle punching or water flow coupling more smooth and By smoothing, it is possible to realize fine and sophisticated patterns in print processing to obtain a luxurious appearance and a smooth and smooth touch. Second, by printing on a smooth and smooth high-density nonwoven felt, the wear strength is significantly increased and the surface is raised. Third, it is possible to remarkably improve the contaminant due to dust adhesion. Third, as a method for realizing a high density nonwoven fabric, the temperature of the heat setting process, which is one of the manufacturing processes, is lowered when manufacturing the fibers constituting the nonwoven fabric. Heat treatment using high temperature and high pressure roll in nonwoven fabric manufacturing As other without a cost increase, to achieve a non-woven fabric having a smooth surface with high density and excellent design properties to provide excellent physical properties of non-woven fabric automobile interior material for it is an object.

Another object of the present invention is a result of research and testing through various trials and errors in order to supplement the problems of the prior art, the heat setting temperature during the production of polyester short fibers constituting the nonwoven fabric In order to manufacture thermally unstable amorphous special fibers by mixing downwards, and to mix non-woven fabrics by mixing a certain amount of the amorphous special fibers, heat treatment with a high temperature and high pressure heat press roll increases the surface density and wear strength of the nonwoven fabric, and makes the surface smooth. To get it.

Still another object of the present invention is to provide a nonwoven fabric material for automobiles having excellent aesthetics by printing fine and fine patterns by using a nonwoven fabric felt having a high surface density and wear strength through the above process. It is to greatly improve the design.

When manufacturing the polyester short fibers constituting the nonwoven fabric, a thermally unstable amorphous special fiber is manufactured through a process of lowering the heat setting temperature, and a non-woven fabric is manufactured by mixing a predetermined amount of the thermally unstable amorphous special fiber. The present invention relates to a nonwoven fabric interior material for automobiles produced through a step of heat treatment with a high temperature and high pressure heat press roll, and a method of manufacturing the same.

Hereinafter, the configuration and operation of the embodiments of the present invention with reference to the accompanying drawings, the configuration and operation of the present invention shown and described in the drawings will be described as at least one embodiment, whereby the present invention described above The technical idea and its core composition and operation are not limited.

It looks at the drawings to facilitate the understanding of the present invention. Figure 1 shows a block diagram and a perspective view of the manufacturing process of the short fibers constituting the nonwoven fabric, Figure 2 is a cross-sectional view showing a process consisting of two to four heat press rolls of high temperature and high pressure. Photograph 1 is a 50 times magnification of the surface of the non-printed nonwoven fabric by electron microscopy, Photograph 2 is a 50 times magnification of the surface of the HD printed nonwoven fabric according to the present invention is photographed by an electron microscope.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric interior material for automobiles and a method of manufacturing the same. The present invention can be usefully used for skin finishing materials such as car ceilings, door trims, seats, and the like. Conventional automotive interior materials are mainly used cloth, non-woven fabric (Poly Vinyl Chloride), such as PVC, these materials are used in a variety of appearance and color through a variety of processing processes. For example, cloth and non-woven fabrics can be dyed and printed to give a variety of patterns and colors, which can be advanced. In the case of PVC, embossing is used to diversify and refine the surface.

The present invention is a thermally unstable amorphous polyester stage by adjusting the heat setting temperature in the manufacture of the polyester short fibers constituting the nonwoven fabric while repeatedly trial and error and research to solve the above problems In order to manufacture fibers, and to increase the surface density of the nonwoven fabric and to obtain a nonwoven fabric having a smooth surface, a process of heat-treating with a high-temperature / high pressure heat press roll in the process of mixing the thermally labile amorphous polyester short fibers to produce a nonwoven felt. Equipped. The nonwoven fabric for automobiles completed according to the present invention has a high surface density and high wear strength, and has a smooth surface, so that delicate printing is possible, which is referred to as HD (non-density) printed nonwoven fabric.

In the present invention, by research and development of the manufacturing method of the fibers constituting the nonwoven fabric felt has a high density and wear of the surface, it is configured to enable the production of a non-woven fabric of a smooth surface, fine and fine pattern that can not be realized in conventional printing It is possible to implement a print, the surface is smooth to feel a soft touch, and the high density of the nonwoven surface can provide a nonwoven fabric interior material for automobiles significantly improved the contamination by dust adhesion.

It looks at a specific embodiment according to the present invention.

EXAMPLES

A specific embodiment according to the present invention will be described with reference to the drawings. The main raw material constituting the nonwoven fabric for automobiles is composed of short fibers, the short fibers are produced by various processes, and the produced short fibers are manufactured for automobile nonwoven fabrics by various processes.

Looking at the process of polyester short fibers most commonly used in automotive nonwoven fabric interior materials are as follows. In the process of manufacturing polyester short fibers, as shown in FIG. 1, a polyester chip is supplied to an extruder, and a polyester liquid melted at a high temperature by an extruder is supplied at a high temperature and high pressure by a spinning facility. Through a hole of a constant size (nozzle) to produce a fiber of the desired thickness. Manufactured fiber strands are lengthened by the stretching process, subjected to a crimping process that twists the shape of the fiber, and then a heat setting process followed by a high temperature chamber. In (Chamber), crystallization of polyester is performed. Heat-set polyester fibers are short fibers by a cutting process of cutting to a certain length, and short polyester fibers are produced by a process of compressing a predetermined amount.

The polyester short fibers produced through the above process are made of nonwoven felt by needle punching or water flow bonding, which is a conventional method, and subjected to chemical coating treatment on the surface or backside of the nonwoven felt and suitable on the surface of the nonwoven fabric felt. Print processing is performed with patterns and colors to manufacture automotive nonwoven fabric interior materials.

The manufacture of non-woven fabrics for automobiles is usually made through a carding process that spreads the fiber widely, and needle punching makes the needle felt by interlacing the fibers with each other, so as to increase the design of the needle felt. It is obtained by

In the polyester short fiber manufacturing process, the heat setting process is an important process for determining the physical properties of the polyester. In the present invention, it is very important to fabricate the polyester short fibers in the manufacturing process using amorphous polyester fibers with the temperature conditions of the heat setting process. That is, the setting of the heat setting temperature during the heat setting process has a great influence on the physical properties of the polyester fiber. In the present invention, the heat setting temperature may be carried out between 110 ℃ to 170 ℃ heat setting process, when the heat setting temperature is 110 ℃ or less when the physical properties of the short fibers become unstable when manufacturing the non-woven felt And a problem in which the fiber is dried and melted in the high-speed rotating body in the punching process, and when the heat setting temperature is 170 ° C. or more, the surface is smoothed in the process of surface heat treatment using a high temperature / high pressure heat press roll. Falling problem occurs.

In the present invention, research and testing are carried out while varying various heat setting temperatures, and the heat setting temperature at which the surface of the nonwoven felt is smooth is formed as a nonwoven felt without affecting the carding and punching process during the manufacture of the nonwoven felt. It is possible to produce amorphous special polyester fibers when the temperature is performed between ℃ and 170 ℃, but the optimum heat setting temperature is preferably carried out at 120 ℃ to 160 ℃.

In the heat setting process, the heat setting time is 180 seconds to 240 seconds when the amorphous special polyester fiber according to the present invention can be produced, but more suitable heat setting time is made between 200 seconds and 220 seconds desirable. If the heat setting time is less than 180 seconds, the heat setting of the fiber is not made properly, if more than 240 seconds there is a problem that the production speed is delayed to increase the production cost.

According to the present invention, the amorphous special polyester short fibers manufactured by deforming the heat setting temperature is preferably composed of 1 to 30 denier in thickness in consideration of the manufacturing conditions of the nonwoven fabric, and the length is made between 45 mm and 85 mm. desirable. By showing the physical properties of the same characteristics even outside the thickness and length can be produced by using a fiber having a variety of thickness and length as needed.

According to the present invention, a process of manufacturing a non-woven fabric for automobiles using a conventional amorphous special polyester short fiber prepared by downwardly deforming the heat setting temperature is performed by deforming the heat setting temperature by using a special amorphous polyester step. The nonwoven fabric felt which bound the fiber layer which comprises a nonwoven fabric using fiber by needle punching or water flow bonding is heat-processed using a high temperature / high pressure heat press roll.

The heat treatment process using the high temperature and high pressure heat press roll according to the present invention comprises two to four heat press rolls of high temperature and high pressure, and maintains the surface temperature of the heat press roll at 160 ° C to 220 ° C. The gap between the heat press rolls is defined to be between 0.1 mm and 3 mm. These regulations are intended to optimize the surface of nonwoven fabrics for automobiles, and are obtained from various tests and studies.

The number of the heat press rolls of the high temperature and high pressure should be 2 or more, so that continuous presses are possible. In the present invention, the number of the heat press rolls is preferably 4 or less, but problems occur even when using more rolls. However, problems such as excessive investment costs and complicated processes can occur.

In addition, the surface temperature of the high-temperature, high-pressure heat press roll for producing a nonwoven felt using the amorphous special polyester short fibers prepared by deforming the heat setting temperature is carried out between 160 ℃ to 220 ℃ according to the present invention Nonwoven fabric felt can be obtained, but more suitable temperature is preferably carried out between 175 ℃ to 205 ℃. At this time, if the surface temperature of the hot press roll of high temperature and high pressure is 160 ° C. or less, heat treatment of the nonwoven fabric felt is not performed properly. If the temperature is 220 ° C. or more, the surface of the nonwoven felt is partially melted. The gap between the heat press roll and the roll during the heat press is made between 0.1 mm and 3 mm, which can be adjusted according to the thickness and the surface of the nonwoven fabric.

When passing the nonwoven felt between the high temperature and high pressure heat press roll as shown in Fig. 3, the temperature of the high temperature and high pressure heat press roll contacting the surface where the pattern is printed on the nonwoven felt is at a high temperature between 170 ° C and 220 ° C. The heat press roll that is in contact with the back surface of the nonwoven felt is adjusted to room temperature by passing cooling water, and the heat is concentrated only on the surface of the nonwoven felt so that the surface can be heat treated effectively. There is an advantage that can be surface treatment. However, the present invention is not limited to the above embodiments, and the present invention is not limited, and according to the degree of surface heat treatment of the nonwoven felt, one or more rolls or all of the high-temperature and high-pressure heat press rolls may have a temperature between 170 ° C and 220 ° C. It is also possible to adjust to high temperature.

In the present invention, it is possible to manufacture a vehicle interior by varying the mixing ratio of the amorphous special polyester fiber obtained by changing the heat setting temperature downward. In the interior material for automobiles according to the present invention composed of 20% by weight to 100% by weight of the amorphous special polyester fiber, and can be produced by mixing the common general fiber with the remaining 80% to 0% by weight, but of the present invention More suitable mixing ratio for achieving the object is preferably composed of 50% by weight to 80% by weight of the amorphous special polyester fiber. If the mixing ratio of the amorphous special polyester is 20% by weight or less, the surface heat treatment effect is insignificant, and a nonwoven fabric felt with a smooth surface cannot be obtained. When the mixed use of the amorphous special polyester fiber is used 100%, the surface heat treatment effect is excellent, and the heat press is performed. There is an advantage that the temperature of the roll is lowered, but when manufacturing the automobile interior assembly (Assembly), there is a problem that wrinkles are likely to occur when the non-woven fabric and the base material is simultaneously molded into the interior assembly (Assembly) of the desired shape.

Common general fibers mixed with the amorphous special polyester fiber prepared according to the present invention is polyester (Polyester), polypropylene (Poly prophylene), viscose rayon (Nylon), polycral (Polycral) Synthetic fibers such as polyamide, polyvinyl chloride, and one or two or more fibers are optionally mixed among natural fibers such as cotton, hemp, wool, silk, and carbon.

It is preferable that the weight of the polyester fiber which comprises the automotive nonwoven fabric interior material which concerns on this invention is 50g / m <2> -500g / m <2>, and the thickness of a nonwoven fabric interior material is 0.5 mm-10 mm.

The present invention provides a smoother surface feel by adding a step of applying a silicon coating on the surface of the nonwoven fabric felt, the surface of the amorphous special polyester fiber using a heat press roll of high temperature and high pressure. The present invention provides a nonwoven fabric felt having a smooth surface, and a fine and fine pattern is printed on the surface thereof to complete a nonwoven fabric interior material for automobiles having excellent design. The present invention further comprises a process of coating an appropriate amount of a silicone emulsion on the surface of the heat treated nonwoven fabric to prepare a nonwoven fabric for automobiles capable of printing finer and finer patterns. In the case of printing a fine pattern on the surface of the conventional nonwoven felt, the nonwoven fabric felt with a high surface irregularities, the print liquid is infiltrated and difficult to show a fine pattern, but the nonwoven fabric using an amorphous special polyester fiber as in the present invention When the surface of the felt is heat-treated with a roll of high temperature and high pressure, a non-woven felt having high density and high wear strength is produced, and when printing on the surface of the non-woven felt composed of high density, it is remarkable that the print liquid permeates the surface of the nonwoven fabric felt. It will be reduced, so that fine and sophisticated patterns can be expressed.

The method for manufacturing a nonwoven fabric interior material for automobiles is a rotary screen method, a flat screen method, and an offset method on the surface of the nonwoven fabric felt in order to give designability after heat-treating the surface of the nonwoven fabric felt using the high temperature / high pressure heat press roll. Select one or more to perform a mixed printing, and at least one printhead may be installed by adding a print process for printing.

The printing process on the surface of the high density and smooth nonwoven fabric felt can be printed using one or several of a rotary (rotary) screen method, a flat screen method, and an offset method. It is configured to perform printing by installing several consecutively.

After the heat treatment is performed on the surface of the nonwoven fabric felt using the high temperature and high pressure heat press roll manufactured according to the present invention, if the surface of the nonwoven fabric felt is further subjected to a coating treatment, it is remarkable that the print liquid penetrates into the nonwoven fabric. It can be reduced to make it possible to print finer and finer patterns. And, due to the characteristics of the silicone component, the touch of the surface is remarkably soft and smooth, and the effect of preventing contamination by dust and other foreign matters is remarkable.

The effects of the present invention can be divided into three categories.

First, it is possible to produce non-woven felt which enables fine and sophisticated printing at low cost. In the manufacturing process of the short fibers constituting the automotive nonwoven fabric interior material of the present invention to manufacture the heat-fixed fiber at a low temperature it is possible to lower the manufacturing cost of the short fiber at a lower heat treatment cost than the conventional, the fiber treated at a low heat setting temperature In the case of manufacturing the nonwoven fabric felt using, the same nonwoven fabric equipment as in the conventional nonwoven fabric manufacturing process can be used, and since the heat press can be performed at a lower temperature, a nonwoven fabric interior material for automobiles with low manufacturing cost can be obtained.

Second, it is possible to obtain a nonwoven fabric for automobiles having a smooth surface and excellent wear strength.

In the present invention, in the production process of the short fibers constituting the nonwoven felt felt by adjusting the heat setting temperature of the fiber appropriately down to prepare amorphous special polyester fibers, using the prepared short fibers to produce a nonwoven felt, high temperature, high pressure The surface heat treatment of the nonwoven felt is performed by a heat press of a nonwoven fabric to make a nonwoven felt having a high density and wear strength and a smooth surface, and a silicone coating on the surface of the nonwoven felt to obtain a nonwoven felt having a softer touch. . Since the surface density of the nonwoven felt is higher than that of the conventional nonwoven felt, it is excellent in preventing contamination by dust and foreign matters, and the wear strength is also improved.

Third, a nonwoven fabric interior material for automobiles having excellent surface designability can be obtained.

As the nonwoven fabric of the present invention improves the surface density and prints on a nonwoven felt which has a smooth surface, the printing liquid which prints a print pattern generated from a normal nonwoven fabric is permeated into the nonwoven fabric felt, so that the shape of the pattern is crushed. It can improve the losing problem, it is possible to print fine patterns on the surface of the non-woven felt clearly, it is possible to achieve a high quality of the design, it is possible to freely select the fine patterns to secure a variety of designs.

Claims (11)

In the method of manufacturing a nonwoven fabric interior material for automobiles used in automotive interior materials, A process of manufacturing amorphous polyester short fibers by fixing heat by controlling the heating temperature downward in the heat setting process during the short fiber manufacturing process for manufacturing the nonwoven fabric; A method of manufacturing a nonwoven fabric interior material for automobiles, which comprises a step of passing a heat press roll having a high temperature and a high pressure in a heat pressure process during a manufacturing process of a nonwoven felt using the prepared amorphous polyester short fibers to heat-treat the nonwoven felt. The method according to claim 1, The non-woven short fiber manufacturing process of the down-controlled heat setting temperature is heat-setting at 120 ℃ to 160 ℃, heat setting time is 200 seconds to 220 seconds manufacturing method for automobile nonwoven fabric interior material. The method according to claim 1, The amorphous polyester fiber has a thickness of 1 denier to 30 denier, the length of the nonwoven fabric interior manufacturing method for automobiles, characterized in that composed of 45 mm to 85 mm. The method according to claim 1, The step of heat-treating the nonwoven fabric felt using the high temperature and high pressure heat press roll comprises two to four high temperature and high pressure heat press rolls, and the surface temperature of the high temperature and high pressure heat press roll is 170 ° C to 220 ° C. A method of manufacturing a nonwoven fabric interior material for automobiles, wherein the non-woven fabric felt is subjected to a surface heat treatment between 0.1 mm and 3 mm in intervals between high temperature and high pressure heat press rolls. The method according to claim 4, The high temperature and high pressure heat press roll controls the temperature of the high temperature and high pressure heat press roll in contact with the surface on which the pattern is printed on the nonwoven felt passing through the roll to a high temperature between 170 ° C and 220 ° C, and the pattern is printed. A method of manufacturing a nonwoven fabric interior material for automobiles configured to allow heat to concentrate on only the surface of a non-woven fabric felt on which a pattern is printed by passing the cooling water through a heat press roll in contact with the back surface of the nonwoven fabric felt so that the surface can be effectively heat treated. The method according to claim 1, The weight of the fibers constituting the vehicle nonwoven fabric interior material is 50g / ㎡ to 500g / ㎡, and the thickness of the nonwoven fabric interior material is 0.5mm to 10mm characterized in that the nonwoven fabric interior material manufacturing method for automobiles. The method according to claim 1, The fiber constituting the automotive nonwoven fabric interior material is composed of amorphous polyester fibers 20% by weight to 100% by weight, the general fiber is 80% by weight to 0% by weight manufacturing method for automobile nonwoven fabric interior material. The method according to claim 7, The general fiber is a method for manufacturing a nonwoven fabric interior material for automobiles composed of at least one of polyester, polypropylene, viscose rayon, nylon, polycral, polyamide-based, polyvinyl chloride, cotton, hemp, wool, silk and carbon fibers. The method according to claim 1, After the heat treatment is performed on the surface of the nonwoven fabric felt by using the high temperature and high pressure heat press roll, the surface of the nonwoven fabric felt is mixed with one or more of a rotating screen method, a flat screen method, and an offset method to provide designability. And, the printhead is a non-woven fabric interior manufacturing method for a vehicle further provided with a printing process for printing by installing one or more. The method according to claim 1, The vehicle further includes a step of coating silicon on the surface of the nonwoven fabric felt to heat the surface of the nonwoven fabric felt using the high temperature and high pressure heat press roll and to provide a smooth touch and to prevent contamination by dust and foreign substances. Nonwoven fabric interior material manufacturing method. A nonwoven fabric interior material for automobiles manufactured by the manufacturing method of any one of claims 1 to 10.

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