KR101680603B1 - Leather sheet cover for vehicle - Google Patents

Abstract

The present invention provides a leather seat cover for a vehicle having a laminated structure in which elastic members and leather fabrics are joined by an adhesive layer. At this time, the elastic member may be a nonwoven fabric formed of polyolefin fibers coated with silicone on the surface and a polyester hollow fiber coated with silicone on the surface or polyolefin fibers coated with silicone on the surface, A polyester hollow fiber coated with silicone and a nonwoven fabric formed of polyester fiber. Further, the adhesive layer is formed by thermocompression bonding of a hot-melt adhesive. The leather seat cover for a vehicle according to the present invention is excellent in light weight, comfortable ride comfort, wrinkles and shape restoring force.

Description

{LEATHER SHEET COVER FOR VEHICLE}

This technology is a technology related to a vehicle seat field, specifically, a technique relating to the manufacture of a leather seat cover for a vehicle which is lightweight and has a comfortable ride feeling and wrinkles and shape restoring force.

Natural leather is a tough skin that envelops the body of an animal, removing hairs from leather, and called tanned leather, and these are collectively called leather. If peeled leather is left untreated, it will soon become corroded. However, if it is treated with a suitable emulsion and made into a dew, it does not become rotten even when wetted with water, it does not become hard when dried, and has excellent properties such as heat resistance and water resistance.

Raw materials of the duck are also used in reptile leather, such as mammalian leather, bird skin such as ostrich, and alligator lizard snakes, including sheep sheep sheep. The above-mentioned natural leather corresponds to a high quality material with excellent physical properties, and it is mainly used for products such as furniture, shoes, and bags.

The above-mentioned natural leather is widely used as an interior material such as a sofa or an automobile seat as a furniture. Especially, according to the preference of the consumer who prefers the luxury car recently, the natural leather sheet is widely used as the interior material of the seat for the luxury automobile.

However, when a natural leather is used for a sofa or a car seat, quality problems due to wrinkling of natural leather occur due to use for a long time. In particular, natural leather applied to automobiles has many problems in that wrinkles are generated when the driver gets up by the physical characteristics of natural leather.

Various types of auxiliary sheets have been produced to solve this quality problem, but the fundamental improvement is insufficient. In order to solve the quality problem, rather than improving the physical properties of the natural leather itself, various materials are added to improve the quality. However, there are other types of secondary quality problems.

The natural leather wrinkle prevention technologies developed to improve the natural leather sheet wrinkle problem include a method in which a leather sheet and a polyurethane foam cushioning material are simultaneously sewn to inserting lines to improve wrinkles or a polyurethane foam is heat- But there are many problems in terms of efficiency and efficiency.

Disclosure of Invention Technical Problem [8] The present invention provides a leather seat cover for a vehicle which is light, yet has excellent wrinkle restoring force, minimizes lifting of leather, and can improve ride comfort .

A leather seat cover for a vehicle according to an embodiment of the present invention has a laminated structure in which elastic members and leather fabrics are joined by an adhesive layer. At this time, the elastic member may be formed of a nonwoven fabric formed of polyolefin fibers coated with silicone on the surface and a polyester hollow fiber coated with silicone on the surface or polyolefin fibers coated with silicone on the surface, A polyester hollow fiber coated with silicone and a nonwoven fabric formed of polyester fiber. The adhesive layer is formed by thermocompression bonding of a hot-melt adhesive.

The nonwoven fabric constituting the elastic member preferably comprises 40 to 60% by weight of polyolefin fibers coated with silicone on its surface and 40 to 60% by weight of polyester hollow fibers coated with silicone on the surface. The nonwoven fabric constituting the elastic member includes 30 to 50% by weight of polyolefin fibers coated with silicone on the surface, 30 to 50% by weight of polyester hollow fibers coated with silicone on the surface and 10 to 50% To 30% by weight. The polyolefin fibers forming the nonwoven fabric are preferably made of polypropylene (PP). The polyester hollow fiber or polyester fiber forming the nonwoven fabric is preferably made of polyethylene terephthalate (PET). The polyester fiber forming the nonwoven fabric is preferably a colored fiber.

The elastic member may further comprise a layer of polyurethane foam, preferably combined with a nonwoven fabric and a nonwoven fabric.

The hot-melt adhesive is preferably a hot-melt adhesive in the form of a web or a hot-melt adhesive in the form of a film. When the hot-melt adhesive is in the form of a web or a film, the component is preferably a thermoplastic resin. When the hot-melt adhesive is in the form of a web or a film, the hot-melt adhesive may partially penetrate into the elastic member by thermocompression bonding. The hot-pressing temperature of the hot-melt adhesive is preferably 90 to 140 ° C, and the thermocompression pressure is preferably 1 to 5 bar. When the hot-melt adhesive is in the form of a web or a film made of a thermoplastic resin, the thermocompression bonding temperature is adjusted such that the actual temperature of the hot-melt adhesive reaches a temperature range above the meltability of the thermoplastic resin, .

The leather seat cover for a vehicle according to an embodiment of the present invention can retain the characteristics of the raw material as it is because the changes in physical properties and dimensional changes of the nonwoven fabric and the leather fabric are small during manufacturing through the hot melt bonding process and furthermore the shape stability is excellent.

When the elastic member, which is one component of the leather seat cover for a vehicle according to an embodiment of the present invention, is made of only a nonwoven fabric, it has excellent self-wrinkle restoring force, excellent comfort performance and coverability, The leather lifting phenomenon can be minimized without wrinkles and wrinkles, and the ride comfort performance of the cushion thigh region can be improved.

When the elastic member, which is one component of the leather seat cover for a vehicle according to an embodiment of the present invention, is composed of a nonwoven fabric and a polyurethane foam, the characteristics of the artificial cotton (PET) layer having no repulsive force and elasticity are maintained as much as possible, It is possible to minimize the wrinkle problem that may occur in the packaging process by providing excellent coverage without wrinkles and wrinkles when applied to the curved and curved surfaces.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual sectional view for explaining a laminated structure of a leather seat cover for a vehicle according to an embodiment of the present invention; FIG.
Fig. 2 is a perspective view of a leather sheet for a vehicle shown in Fig. 1 to illustrate major effect areas of the leather sheet cover for a vehicle. Fig.
3 is a conceptual cross-sectional view illustrating a laminated structure of a leather seat cover for a vehicle according to another embodiment of the present invention.
Fig. 4 is a perspective view of a leather sheet for a vehicle shown in Fig. 3 for explaining main effect areas of the leather sheet cover for a vehicle. Fig.

Hereinafter, a leather seat cover for a vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the following explanations are only illustrative descriptions of the leather seat cover for a vehicle, and the technical idea of the present invention is not limited by the following description, and the technical idea of the present invention is defined by the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual sectional view for explaining a laminated structure of a leather seat cover for a vehicle according to an embodiment of the present invention; FIG.

Referring to FIG. 1, a vehicle leather seat cover 100 includes an elastic member 110, an adhesive layer 120, and a leather monolayer 130. In the automotive leather seat cover 100 according to the present invention, the elastic member 110 and the leather antifouling layer 130 have a laminated structure in the form of being bonded by an adhesive layer made of a hot-melt adhesive. Specifically, the leather sheet cover 100 can be formed by placing a hot-melt adhesive between the elastic member 110 and the leather monolayer 130 and thermally pressing the hot-melt adhesive by a roller or the like in a heated atmosphere. The planar development of the cover 100 according to the shape of the sheet may vary, and the description will focus on the laminated structure of the seat cover 100 in this specification.

Referring again to FIG. 1, the elastic member 110 includes a nonwoven fabric. The nonwoven fabric may be produced by various known methods. For example, the nonwoven fabric to be used in the present invention can be produced through a thermal bonding process such as a calender bonding process, an air through bonding process, a chemical bonding process, a needle punching process, a water flow bonding process, or the like. In the present embodiment, the nonwoven fabric constituting the elastic member may be formed of polyolefin fibers coated with silicone on the surface and polyester hollow fibers coated with silicone on the surface, 40 to 60% by weight of silicone-coated polyolefin fibers and 40 to 60% by weight of polyester hollow fibers coated with silicone. The term " fiber " used in the present invention includes various forms such as short fibers, long fibers, and monofilament yarns. Further, the hollow fiber is a fiber having a hollow center portion with respect to a cross section. The hollow fibers used in the present invention can reduce the weight of the nonwoven fabric, while sufficiently maintaining the elasticity and restoring force of the nonwoven fabric required for the leather seat cover. The polyolefin fibers or polyester hollow fibers can be prepared by melt spinning of the polymer, respectively, and the cross-sectional shape and thickness of the fibers can be determined according to the nozzle shape and size of the fusing spinner. On the other hand, the prepared polyolefin fibers or polyester fibers can be processed into a silicone-coated fiber by a coating process by an impregnation method in a silicone resin solution. In addition to impregnation, the silicone coating can be applied by various methods such as spraying. As the silicone resin solution, various commercially available silicone coating agents may be used. Further, in the present embodiment, the nonwoven fabric constituting the elastic member may preferably be formed of polyolefin fibers coated with silicone on the surface, polyester hollow fibers coated with silicone on the surface thereof, and polyester fibers More preferably 30 to 50% by weight of polyolefin fibers coated with silicone on the surface, 30 to 50% by weight of polyester hollow fibers coated with silicone on the surface and 10 to 30% by weight of polyester fibers, . At this time, the polyester fiber may be colored fiber. The polyolefin fibers forming the nonwoven fabric may be composed of various known polyolefins. For example, the polyolefin fibers may be selected from the group consisting of high density polyethylene, linear low density polyethylene, low density polyethylene, polypropylene (propylene homopolymer), ethylene-propylene copolymer mainly composed of propylene, ethylene propylene butene- , Polybutene-1, polyhexene-1, polyoctene-1, poly 4-methylpentene-1, polymethylpentene, 1,2-polybutadiene, 1,4-polybutadiene, Water, maleic anhydride-modified product of propylene-based polymer, and the like, preferably polypropylene (PP). The polyester hollow fiber or polyester fiber forming the nonwoven fabric may be composed of various polyesters. For example, the polyester hollow fiber or polyester fiber may be selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polyethylene terephthalate glycol (PETG), polycyclohexanedimethylene terephthalate (PCT), and the like, and is preferably made of polyethylene terephthalate (PET). The ratio of the fineness of the polyolefin fibers forming the nonwoven fabric to the polyester hollow fibers or the ratio of the fineness of the polyolefin fibers to the polyester fibers is preferably 1: 0.1 to 0.5. That is, when 10-denier polyolefin fibers are used, polyester hollow fibers or polyester fibers of about 3 denier are preferably used.

As the leather monolayer 130, various natural hides can be used, and they are prepared in the form of a film of the same thickness for the uniform surface characteristics of the sheet. The leather outer layer 130 may be firmly attached to the elastic member 110 via an adhesive layer 120 formed of a hot-melt adhesive.

The adhesive layer 120 is formed by thermocompression bonding of a hot-melt adhesive, and the hot-melt adhesive is selected from a hot-melt adhesive in the form of a web or a hot-melt adhesive in the form of a film. The web-like hot melt adhesive may be a thin film having a plurality of voids between fine polymer wires formed by the spinning of the polymer resin, i.e., a web structure and a predetermined thickness. In addition, the web-type hot-melt adhesive or the hot-melt adhesive in the form of a film is preferably made of a thermoplastic resin. The thermoplastic resin may include a resin capable of reaching a melting point within the process temperature of the thermocompression process, and there is no limitation on the type. The web-type hot-melt adhesive or the hot-melt adhesive in the form of a film made of the thermoplastic resin is melted by thermocompression bonding so as to not only bond the elastic member 110 and the leather monolayer 130 but also include elasticity Thereby contributing to the restoring force of the finished product. The thermocompression process is performed so that the actual temperature of the web-shaped hot-melt adhesive or the hot-melt adhesive in the form of a film reaches 90 to 120 ° C. In this case, the temperature of the elastic member 110 or the leather monolayer 130 may be relatively higher than the actual temperature of the hot-melt adhesive during the thermocompression process. In the present invention, the thermal compression temperature refers to the temperature range of the upper roller and the lower roller for performing the thermal compression through the hot-melt adhesive. In the thermocompression process, the heat of the upper roller and the lower roller is transferred to the hot-melt adhesive through heat conduction. Thus, the actual temperature of the hot melt adhesive during the thermocompression process can be governed by the temperature of the upper roller in contact with the lower roller and the leather monolayer 130 in contact with the elastic member 110. Considering this point, the thermocompression temperature is preferably 90 to 140 占 폚, and the thermocompression pressure is preferably 1 to 5 bar. As a result, the heat transmitted by the upper and lower rollers reflects the heat conduction characteristics of the nonwoven fabric constituting the elastic member 110 and the heat conduction characteristics of the leather material constituting the leather monolayer 130, .

Fig. 2 is a perspective view of a leather sheet for a vehicle shown in Fig. 1 to illustrate major effect areas of the leather sheet cover for a vehicle. Fig.

Referring to FIG. 2, the leather seat cover 100 for a vehicle according to the present embodiment has excellent self-wrinkle restoring force, excellent comfort performance, and coverability. Therefore, when applied to a bag- The leather lifting phenomenon can be minimized and the ride comfort performance of the cushion thigh region can be improved.

3 is a conceptual cross-sectional view illustrating a laminated structure of a leather seat cover for a vehicle according to another embodiment of the present invention.

3, the vehicle leather seat cover 200 according to the present embodiment includes an elastic member 210, an adhesive layer 220, and a leather antifouling layer 230. The description of the remaining components except for the elastic member 210 in comparison with the above-described leather seat cover 100 for a vehicle of FIG. 2 is the same as the corresponding configuration of FIG. 2 and is omitted.

The elastic member 210 shown in FIG. 3 includes a nonwoven fabric 212 and a polyurethane foam layer 214 disposed on the nonwoven fabric 212. An example of the polyurethane foam layer 214 is a polyurethane foam. The nonwoven fabric 212 and the polyurethane foam layer 214 can be joined by various known means, for example, by means of bonding by needle punching.

Fig. 4 is a perspective view of a leather sheet for a vehicle shown in Fig. 3 for explaining main effect areas of the leather sheet cover for a vehicle. Fig.

When a foam layer 214 such as a polyurethane foam is included in addition to the nonwoven fabric 212 as the elastic member 210 as the leather seat cover 200 for a vehicle of FIG. 3, a synthetic resin (PET) It is possible to minimize the wrinkle problem that may occur in the packaging process by providing excellent coverage without wrinkles and wrinkles when applied to the curved surface and double curved surface area after bonding to the leather surface by maintaining the layer characteristics as much as possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle leather seat cover according to the present invention will be described in detail with reference to specific embodiments of the present invention and experimental evaluation results of the embodiments. It should be understood, however, that the following examples are intended to be illustrative only and that variations thereof may be reproduced without departing from the scope of the following claims.

[Example]

A hot-melt adhesive agent in the form of a web, and a natural leather are laminated in this order, and then supplied to a hot-melt bonding apparatus having a pressure heating roller at the top and at the bottom and thermally bonded under a predetermined temperature and pressure condition, . Table 1 below shows the elastic members used in Comparative Examples 1 to 4 and Examples 1 to 4. Table 2 shows the working conditions of the hot melt bonding process for TEX type elastic members, and Table 3 shows the working conditions of the hot melt bonding process for COMB type elastic members.

※ TEX type: elastic member made only of nonwoven fabric

※ COMB type: Elastic member of polyurethane foam bonded to nonwoven fabric by needle punching

Explanation of the constitution of the elastic member: Based on the comparative example 1, 8T indicates that the total thickness of the elastic member is 8 mm, and 70% of the 3D PET and 30% of the 3D silicone-coated PET are PET fibers 70 having a fineness of 3 denier % ≪ / RTI > and a fineness of 3 denier, and the surface of which was formed of 30 weight% of PET coated with silicone. Further, P.P represents a polypropylene fiber.

※ Weight: It refers to basis weight of nonwoven fabric.

In the Tables 2 and 3, the upper side represents the upper roller temperature of the hot-melt adhesive apparatus, and the lower roller temperature of the hot-melt adhesive apparatus represents the temperature. The speed is determined by a hot melt adhesive apparatus It represents the feeding speed. The pressure also indicates the pressure applied between the upper roller and the lower roller of the hot melt adhesive apparatus.

Property evaluation (TEX type)

The softness change, the thickness change and the amount of shrinkage of the raw hide after the hot-melt bonding operation were evaluated in Comparative Example 1 and Example 1 using an elastic member of TEX type (polyurethane foam not included). Table 4 summarizes the results of the physical properties evaluation.

Referring to Table 4, it can be seen that the shrinkage of the leather hides occurred relatively less as compared to the leather cover of the first comparative example. That is, the case of Example 1 can be evaluated as superior in the product stability in the hot-melt bonding process.

Property evaluation (COMB type)

The softness change, the thickness change and the amount of shrinkage of the raw hide after the hot-melt bonding operation were evaluated for Comparative Examples 2 to 4 and 2 to 4 using the elastic member of COMB type (including polyurethane foam). Table 5 summarizes the results of physical properties evaluation.

Referring to Table 5, it can be seen that the leather seat cover of Examples (2, 3 and 4) has less flexibility change as a whole than the leather seat cover of Comparative Examples (2, 3 and 4) Respectively. In the case of the examples, it was found that the thickness reduction degree in the hot melt bonding process is much smaller than that in the comparative examples.

Claims (4)

The elastic member and the leather fabric are joined by the adhesive layer,
The elastic member may be formed by needle-punching polypropylene (PP) fibers coated with silicone on the surface, polyethylene terephthalate (PET) hollow fibers coated with silicone on the surface, and polyethylene terephthalate (PET) A nonwoven fabric,
The adhesive layer is formed by thermocompression bonding of a hot-melt adhesive,
The hot melt adhesive is selected from a hot melt adhesive in the form of a web or a hot melt adhesive in the form of a film,
The ratio of the fineness of the polypropylene (PP) fibers forming the nonwoven fabric to the polyethylene terephthalate (PET) hollow fibers or the ratio of the fineness of the polypropylene (PP) fibers to the polyethylene terephthalate (PET) 1: 0.5. ≪ / RTI >
The leather seat cover for a vehicle according to claim 1, wherein the elastic member comprises a polyurethane foam layer combined with the nonwoven fabric and the nonwoven fabric.
The nonwoven fabric according to any one of claims 1 to 3, wherein the nonwoven fabric comprises 30 to 50% by weight of polypropylene (PP) fiber having silicone coated on its surface, and polyethylene terephthalate (PET) hollow 30 to 50% by weight of fibers and 10 to 30% by weight of polyethylene terephthalate (PET) fibers.
The leather sheet cover for a vehicle according to claim 1 or 2, wherein the hot-melt adhesive is partially penetrated into the elastic member by thermocompression bonding.

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