JP5443436B2 - Covering tape material - Google Patents

Description

  The present invention relates to a covering tape material for adhering as a decorative covering to a weather strip mounted on a door trim or the like of an automobile.

  Around the doors of automobiles, various ideas have been devised in order to reduce the impact at the time of opening and closing or to enhance the airtightness of the passenger compartment due to the importance of quietness and temperature / humidity management during driving. As one of them, for example, Japanese Patent Application Laid-Open No. 2004-1774 (hereinafter referred to as Patent Document 1) discloses a technique related to a weather strip for mounting on a flange provided on an opening peripheral edge of a door.

  FIG. 1 is a cross-sectional view for explaining the general shape of the weather strip disclosed in Patent Document 1 described above. The weather strip 11 shown in FIG. 1 is called an opening trim in Patent Document 1, and has a mounting portion 13 having a substantially U-shaped cross section, a hollow seal portion 15 protruding from one side surface thereof, and the other of the mounting portion 13. The design lip portion 17 formed on the side surface of the main body is the main configuration. The U-shaped opening defined by the mounting portion 13 is provided for accommodating and fixing a door flange (not shown), and a plurality of flange holding lips 19 are provided for the purpose of improving adhesion to the flange. A protrusion is formed so as to face the inside of the opening. Further, the hollow seal portion 15 has a tube-like structure that reversibly undergoes compressive deformation by being brought into contact with the door in a state where it is mounted on the flange, and imparts hermeticity in the passenger compartment. Thus, the attachment portion 13 has a function of fixing and holding the weather strip 11 to a flange (not shown), and the hollow seal portion 15 that can be compressed and deformed is sealed between the closed door and the flange. It has a function. Therefore, since the attachment portion 13 is mounted and fixed to a flange that defines the opening periphery according to the door shape, a rigid material such as a metal plate may be embedded as a core material. Furthermore, a decorative coating 21 is attached to the weather strip 11 produced by integral extrusion molding on the outer surface extending from the attachment portion 13 to the design lip portion 17.

  Hereinafter, the weather strip flange will be described with reference to the drawings. FIG. 2 is an explanatory view of an example of an arrangement shape of a flange provided around the door of an automobile, in particular, the opening periphery of the door. In general, the door has a substantially pentagonal shape, and a door opening 23 as shown is formed. On the flange 25 provided on the peripheral edge of the door opening 23, there are a plurality of curved portions denoted by reference numeral 27. Therefore, when assembling the vehicle, the mounting portion 13 of the weather strip 11 as shown in FIG. 1 is fitted into the flange 25, and the both ends of the weather strip 11 are connected and fixed by means such as welding at any position. Is done.

  Next, regarding the material configuration of the weather strip illustrated in FIG. 1, in Patent Document 1 described above, solid EPDM (both ethylene, propylene, and diene are used as material examples of the attachment portion 13, the design lip portion 17, and the flange holding lip 19. Polymer) rubber is used, and sponge EPDM rubber is disclosed as an example of the material of the hollow seal portion 13, and materials having different properties and a core material (not shown) are integrally extruded. In addition, a resin film, a thermoplastic elastomer film, or a fabric (cloth) is thermally welded to the outer surface from the attachment portion 13 to the design lip portion 17 on the weather strip 11 obtained in this manner. The component after such heat welding corresponds to the decorative coating 21 shown in FIG. 1, but is attached to the design lip portion 17 of the weather strip 11 before fitting into the flange 25. Is. The design lip portion 17 elastically forms a gap between a pillar, a headlining, etc. (not shown) provided in the passenger compartment adjacent to the door opening 23 and the weather strip 11 fitted in the flange 25. Used to perform the function of sealing.

  Furthermore, according to Patent Document 1 described above, as a preferred embodiment of the decorative covering 21, a pattern such as a texture pattern is formed on the surface thereof, and a similar pattern is also formed on the outer surfaces of the attachment portion 13 and the design lip portion 17. It is described that the appearance can be improved by having the same pattern, and by making these components have the same color tone.

JP 2004-1774 ([Claims], [0020] to [0022], [FIG. 2])

  The weather strip described above is fitted into a flange after a decorative coating is attached to the main molded product. At this time, the fitting operation to the flange is performed while the weather strip is stretched, but at the curved portion of the flange, wrinkles are generated on the decorative covering surface of the mounting portion shown in FIG. 1, and the appearance is impaired. There was a point.

As a material constituting such a decorative coating, a tricot having a surface density of about 100 to 150 (g / m ² ) is used for the purpose of not exposing the surface of the design lip. However, since the tricot is thick, there is a problem that the sense of unity with the design lip portion 17 is impaired.

  The present invention has been made in view of the above-described conventional problems. Accordingly, an object of the present invention is to eliminate the above-described wrinkles that occur during a weather strip mounting operation, and to provide a decorative coating. Thus, it is an object of the present invention to provide a coated tape material that can be easily attached to a weather strip and can realize an excellent sense of unity between the decorative coating and the weather strip after the application.

  In order to achieve this object, according to the configuration of the coated tape material of the present invention, the main feature is that a base material layer mainly composed of crimped latent crimpable fibers and an adhesive layer are provided.

  In carrying out the present invention, it is preferable that the above-mentioned adhesive layer is made of a hot melt resin. Furthermore, as the covering tape material of the present invention, it is preferable that the above-described base material layer is composed of a hydroentangled nonwoven fabric.

  By adopting the configuration of the present invention, it is possible to eliminate the wrinkle of the decorative coating that occurs during the work of attaching the weather strip, and to improve the integrity of the weather strip and the decorative coating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a weather strip for explaining the present invention and the background art. It is a schematic diagram paying attention to the door opening of a car in order to explain the present invention and the background art.

  Hereinafter, preferred embodiments of the present invention will be described in detail. First, the main configuration of the present invention includes a base material layer, which will be described in detail later, and an adhesive layer. First, as the base material layer of the present invention, various fabrics mainly composed of latent crimpable fibers can be adopted, but even when sticking to a weather strip, it exhibits appropriate stretchability, And since it can manufacture cheaply, it is suitable to set it as the crimped nonwoven fabric. As is well known, this latent crimpable fiber is a material that produces a large number of crimps such as spirals and coils by heating, and is prepared by a web using a card machine or the like by selecting optimum crimping conditions. In addition, it means that the number of crimps at least twice as large as the initial number of crimps is generated by heating after supplementary entanglement such as a needle punch technique or a high-pressure water flow method. Moreover, in this base material layer, as long as the latent crimpable fiber is contained at least 50% by mass or more, other constituent fibers may be included. Further, as the above-described entanglement technique, the hydroentangled nonwoven fabric by the high-pressure water flow method can efficiently increase the density of the base material layer and reduce the thickness, so that a sense of unity with the design lip portion 17 is obtained. It is done. In the present specification, the fiber composition means “mass%” and is simply expressed as “%”.

  As the latent crimpable fiber described above, a composite fiber in which two kinds of resins having different melting points are combined, or a fiber having a specific heat history applied to a part of the fiber is used. As the composite fiber, for example, an eccentric core-sheath composite fiber or a side-by-side (bonding) type composite fiber is preferably used. Examples of combinations of resins having different melting points include those obtained by combining various synthetic resins such as polyester-low melting point polyester, polyamide-low melting point polyamide, polyester-low melting point polyamide, polyester-polypropylene, polypropylene-low melting point polypropylene, and polypropylene-polyethylene. Can be used. In particular, the latent crimpable fiber made of polyester-low-melting polyester may be excellent in heat resistance and stretchability after the occurrence of crimp. In addition, as a fiber having a specific thermal history applied to a part of the fiber, for example, the thermal history is applied by passing one side of a fiber made of a thermoplastic resin such as polyester, polyamide, or polyacryl to a hot blade. The given fiber is used.

  Further, as the fibers other than the latent crimpable fibers, fibers that do not substantially increase crimp by heating can be used. For example, polyester fibers, nylon fibers, and polyolefin fibers that are generally used It is also possible to use fibers such as fibers, polyacrylic fibers, rayon fibers, cotton, and wool, and composite fibers that do not substantially increase crimps by heating. Examples of such composite fibers include core-sheath type composite fibers made of a combination of resins such as dyeable polyester-polyamide. Here, the fiber that does not increase in crimp substantially by heating means an increase in the number of crimps even if there is a slight increase in crimp when heated with no external force applied by the fiber alone. This means that the minute is less than 50% of the original number of crimps.

  Furthermore, the adhesive layer constituting the coated tape material of the present invention can be variously selected depending on the means for sticking the tape material to the weather strip, such as various adhesives, films made of thermoplastic hot melt resin, and nonwoven fabrics. Can be designed. Among these, the adhesive layer constituted of various hot melt resins in a film shape can suppress the thickness after the weather strip is attached to the minimum, and can realize excellent adhesion with the design lip portion 17, Is preferred. As such a thermoplastic hot melt resin, a known one can be selected and used. For example, a thermoplastic polyamide-based resin, a thermoplastic polyester resin, a thermoplastic polyurethane resin, a polyolefin resin, or a polyolefin-modified resin is used alone. Or it can be mixed and used.

The coated tape material of the present invention can be designed in various ways according to the design dimensions of the design lip portion described above, but in order to obtain the integrity of the design lip portion and the coated tape material, The thickness of the tape material is preferably in the range of 0.3 to 0.7 mm (20 (g / m ² ) when compressed).

  Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, as a present Example, after preparing a covering tape material by various structures, it demonstrates about the result of having actually evaluated the mounting state to a flange. In addition, these descriptions will be described with reference to specific numerical conditions, shapes, arrangement relationships, etc. in order to facilitate understanding of the present invention, but these specific conditions are merely examples and are within the scope of the object of the present invention. Thus, the design can be changed or modified arbitrarily.

Example 1
As a covering tape material according to Example 1, only a commercially available polyester-based latent crimpable fiber (2 denier × 51 mm: polyester / modified polyester) is opened by a card method and entangled by a high-pressure water flow according to a conventional method. After forming the web, in order to crimp the constituent fibers, it was supplied to a hot air heating furnace set at 186 ° C. to obtain a stretchable nonwoven fabric. Thereafter, dyeing with a disperse dye was performed by a well-known technique to obtain a stretchable nonwoven fabric as a base material layer having a surface density of 80.1 (g / m ² ). Next, as the adhesive layer, “Clanbetter VA-3300” which is a commercially available hot melt resin film (trade name, Kurashiki Boseki Co., Ltd., melting point: 138 ° C., surface density: 45.0 (g / m ² ), polyolefin) The coated tape material of Example 1 having a surface density of 125.1 (g / m ² ) and a thickness of 0.4 mm (at the time of the compressive load) was obtained.

(Example 2)
On the same base material layer as in Example 1, “Clambetter VA-1510” (trade name, manufactured by Kurashiki Boseki Co., Ltd., melting point 95 ° C., surface density 28 (g / g), which is a commercially available hot melt resin film as an adhesive layer. m ² ) and polyethylene) were heat-bonded to obtain a coated tape material of Example 2 having an areal density of 108.1 (g / m ² ) and a thickness of 0.6 mm (at the time of compressive load).

(Example 3)
As a covering tape material according to Example 3, 90% of commercially available polyester-based latent crimpable fiber (2 denier × 51 mm: polyester / modified polyester) and 10% of polyester fiber (1.3 denier × 38 mm) were used. After opening into a fiber web by entanglement with high-pressure water under the same conditions as above, in order to crimp the constituent fibers, the fiber is supplied to a hot air heating furnace set at 186 ° C. to obtain a stretchable nonwoven fabric. It was. Thereafter, dyeing with a disperse dye was performed by a well-known technique to obtain a stretchable nonwoven fabric as a base material layer having a surface density of 80.6 (g / m ² ). Next, the same hot-melt resin film as that of Example 1 was heat-bonded, and the covering tape material of Example 3 having a surface density of 125.6 (g / m ² ) and a thickness of 0.4 mm (at the time of the compressive load) did.

(Comparative Example 1)
As the covering tape material according to Comparative Example 1, a commercially available tricot (surface density 135 (g / m ² )) was used as a base material layer, and the same hot-melt resin film as in Example 1 was heat-bonded as an adhesive layer. It was set as the covering tape material of the comparative example 1 which has a density of 180.0 (g / m < ² >) and thickness 0.8mm (at the time of the above-mentioned compression load).

(Comparative Example 2)
As a covering tape material according to Comparative Example 2, only a 16-part composite fiber (2 denier × 51 mm) made of commercially available polyester / nylon is opened under the same conditions as in Example 1, and high-pressure water entangled. A fiber web divided into fine fibers was prepared and dyed with a disperse dye to obtain a nonwoven fabric corresponding to a substrate layer having an areal density of 92.3 (g / m ² ). Next, the same hot-melt resin film as in Example 1 was heat-bonded, and the coated tape material of Comparative Example 2 having a surface density of 137.3 (g / m ² ) and a thickness of 0.4 mm (at the time of the compressive load) did.

(Comparative Example 3)
As a covering tape material according to Comparative Example 3, the original polyester fiber (3 denier × 51 mm) 90% and the original polyester core-sheath adhesive fiber (melting point of the core component: 250 ° C., melting point of the sheath component: 110 ° C., 4 Denier × 51 mm) 10% was opened under the same conditions as in Example 1 and subjected to needle punching to obtain a nonwoven fabric corresponding to a base material layer having a surface density of 101.3 (g / m ² ). Next, the same hot-melt resin film as in Example 2 was heat-bonded, and the coated tape material of Comparative Example 3 having a surface density of 129.3 (g / m ² ) and a thickness of 1.8 mm (at the time of the compressive load) did.

  Table 1 shows the evaluation results when these coated tape materials were attached to a general weather strip and actually attached to the flange. Moreover, in the same table | surface, while showing the structure of fiber composition of each tape material, an intertwining means, etc., about an evaluation result, (1) The surface state (degree of wrinkle generation | occurrence | production) of the decoration coating in the curved part of a flange, (2) Relative evaluation was made on the basis of Comparative Example 1 corresponding to a conventional weather strip for the two items of the integrity of the design lip portion 17 and the covering tape material at the curved portion of the flange. Comparative Example 1 was evaluated as Δ, and when it was in a better wearing state than Comparative Example 1, it was evaluated as ○, and when it was inferior to Comparative Example 1, it was evaluated as ×.

  As can be understood from the above table, in Examples 1 to 3 to which the configuration of the present invention was applied, all the evaluation items showed better results than Comparative Example 1, whereas the potential as a base material layer In Comparative Example 2 and Comparative Example 3 configured without using crimpable fibers, both the surface condition and the integrity were unsuitable because of poor stretchability.

11: Weather strip, 13: Mounting portion, 15: Hollow seal portion, 17: Design lip portion,
19: flange holding lip, 21: decorative covering, 23: door opening, 25: flange,
27: Curve portion.

Claims (7)

A weatherstrip covering tape material comprising a base layer containing 90-100% by mass of latent crimpable fibers that have crimped, and an adhesive layer, wherein the covering tape material has a thickness of 0.3- A weatherstrip covering tape material having a thickness of 0.7 mm (at 20 g / m ² compression load).   The weatherstrip covering tape material according to claim 1, wherein the adhesive layer is made of a hot-melt resin.   The weatherstrip covering tape material according to claim 2, wherein the adhesive layer is a hot melt resin film.   The covering tape material for weather strips as described in any one of Claims 1-3 whose said base material layer is a hydroentangled nonwoven fabric.   The weatherstrip covering tape material according to any one of claims 1 to 4, wherein the latent crimpable fibers are crimped in a spiral shape or a coil shape. A weatherstrip covering tape material comprising a base layer containing 90-100% by mass of latent crimpable fibers that have crimped, and an adhesive layer, wherein the covering tape material has a thickness of 0.3- Use of a covering tape material for a weather strip, which is 0.7 mm (at 20 g / m ² compression load).   The weather strip includes a mounting portion having a substantially U-shaped cross section that is held by a flange at the periphery of the door opening of an automobile, and a hollow seal portion that protrudes from the mounting portion and contacts the peripheral edge of the door when the door is closed. The weather strip according to claim 6, wherein the covering tape material is adhered to the outer surface of the attachment portion by the adhesive layer.

Images