JPS61258741A - Flexible decorative molded shape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a soft decorative molded product used for vehicle interior parts, residential interior decoration parts, and the like.

(Prior Art) The surfaces of synthetic resin molded products such as vehicle interior parts, such as instrument panels, armrests, and pillar garnishes, are coated or coated for the purpose of protecting or decorating the molded base material.
Various surface decorations are applied, such as flocking or soft skin covering of vinyl chloride or fabric. In addition, various kinds of surface decorations described above are applied to the surfaces of various interior decoration products for houses for the same purpose.

(Problems to be Solved by the Invention) Among the various surface decorations mentioned above, taking painting as an example, there is one in which resin beads are mixed into the paint to impart a soft texture to the top coat (rabbit paint). However, since the coating itself is hard, it is not soft to the touch.

In addition, in the case of flocking, the pile is usually raised, so even though it has a soft texture, it does not have a firm feel, and there is a problem that dust due to static electricity is likely to adhere.

Furthermore, when a soft skin such as vinyl chloride or Fabrica is attached to a surface, it is difficult to create a fine surface unevenness pattern because it needs to be attached to fit the shape of a three-dimensional molded product. Moreover, since many other steps such as winding of the terminal portion are required, there is a drawback that the manufacturing cost increases.

As mentioned above, all conventional soft decorative molded products have the problems mentioned above, but so far, no material for surface decoration with a soft feel to the touch has been found. is the current situation.

In view of the above-mentioned problems, the present inventors have conducted repeated research on various surface decoration materials and their application to three-dimensional molded products, and as a result, have discovered a new and useful material by coating film molding, and have completed the present invention. This is what led to this.

Structure of the Invention (Means for Solving Problems) That is, the present invention is a molded article consisting of a base material having a three-dimensional shape and a soft coating layer formed on the surface of the base material, which The soft coating layer is formed by coating the surface of the substrate with a urethane paint containing a blowing agent and mainly composed of block-type isocyanate, and heating it at a temperature higher than the foaming temperature of the blowing agent. It is obtained by forming fine bubbles in.

The second invention also provides a molded product comprising a base material having a three-dimensional shape, an intermediate layer that is softer than the base material formed on the surface of the base material, and a soft coating layer formed on the surface of the intermediate layer. In order to form the soft coating layer, a urethane paint containing a blowing agent and mainly composed of block-type isocyanate is applied to the surface of the intermediate layer and heated at a temperature equal to or higher than the foaming temperature of the blowing agent. As a result, fine bubbles are formed inside the bubble.

In addition, the urethane-based paint mainly composed of block-type isocyanate used in the present invention and the second invention is an emulsion type in which the NCO group at the terminal of the isocyanate is masked with another organic compound having an OH group, etc.
These are dispersion type, water soluble type paints, or organic solvent type paints.

The blowing agent is a well-known blowing agent such as a chemical blowing agent or a microcapsule type blowing agent filled with a gas such as N2.002, and is usually used in the urethane paint.
Contains about 15%.

(Function) After applying a paint containing a foaming agent and mainly composed of block-type isocyanate to the surface of a three-dimensional molded product,
By pre-drying to evaporate the solvent and then heating and foaming, a soft coating layer in which fine air bubbles are formed inside the coating film made of the same coating material can be obtained. Therefore, the quality of the coating material and the internal microfoaming properties combine to produce a soft decorative molded product that has a soft, moist, and slimy surface both visually and tactilely. be able to.

(First invention) Furthermore, by providing an intermediate layer made of a material softer than the base material of the molded article between the molded article having the three-dimensional shape and the soft coating layer, the soft coating layer constituting the intermediate layer can be In addition to the soft feel of the material itself, the moist and slimy feel of the soft coating layer is added.

Therefore, it is possible to obtain a soft decorative molded product that has a softer feel and texture and a skin structure that is even more decorative. (Second invention) (Example) Example-1 Hereinafter, an example in which the present invention is embodied in an instrument panel (hereinafter abbreviated as an instrument panel), which is an interior part of an automobile, will be described in Figs. This will be explained based on FIG.

In this embodiment, the base material 2 of the instrument panel is a molded product with a U-shaped cross section obtained by injection molding ABS resin,
The soft coating layer 1a formed on the surface is formed by applying a urethane paint containing a foaming agent and having block isocyanate as its main component, and then heating it to form fine bubbles inside the coating. This is the coating layer.

More specifically, the soft coating layer 1a is formed by spraying a urethane emulsion paint containing 10% of a chemical foaming agent onto the surface of the base material 2 so that the film thickness is about 70μ, and applying the coating at 80°C. After dehydration by drying with 30 molecules at the same time, a far-infrared heater is irradiated from the top side of the coating film made of the above paint for about 40 seconds so that the surface temperature of the paint film becomes about 120°C to remove the chemical foaming agent. This is a foamed urethane resin coating layer with a thickness of approximately 200μ, which is formed by foaming the foam to form fine bubbles inside the coating. In addition, the above urethane emulsion paint is block type hexamethylene diisocyanate (HMD
It is a non-yellowing type paint which contains I) as a main component and emulsified by mixing it with water together with a well-known emulsifier. It also contains additives.

FIG. 2 is a partially enlarged view of FIG. 1, and shows a soft coating layer 1 made of foamed urethane resin coated on the surface of the base material 2.
A has a large number of bubbles 3 formed therein. Therefore, the large number of microfoams inside the soft coating layer 1a
It also has a subtle effect on the unevenness of the thin film on its surface, changing the way it reflects light, giving it a soft and deceptive appearance, as well as giving it a moist and slimy feel to the touch. Therefore, the instrument panel having the soft coating layer 1a of this example is a soft decorative molded product with an unprecedented dressy high-grade material feel.

In addition, in the case of a decorative molded product in which the above-mentioned soft coating layer 1a is formed on the surface of a base material of a synthetic resin molded product having a grain pattern, in addition to the above-mentioned material texture, a color tone with a difference in shade is added.
A soft decorative molded product with a more luxurious feel can be obtained.

Furthermore, by providing this soft coating film, the original gloss of the synthetic resin base material is canceled out, and external light is diffusely reflected on its surface, so it also exhibits an anti-glare effect, making it ideal for use in instrument panels. It is a soft decorative molded product.

Embodiment 2 FIG. 3 is a sectional view showing an embodiment in which the second invention is embodied in a console box lid, which is also an interior part of an automobile.

In this embodiment, the base material 2 of the console box lid consists of a foam molded core material 4 made of polypropylene (PP) resin and having a trapezoidal cross section, and a support plate 5 made of nylon resin fixed to the bottom of the foam core material 4. . In addition, a PP brimer 6 and a urethane adhesive 7 are sequentially applied to the surface of the base material 2, and a bail 8 made of nylon-6 short fibers having a length of 3 denier and 1.0 mm is applied to the surface. An intermediate layer 10 is formed which has been subjected to a flocking process.

Furthermore, a soft coating layer 1b made of foamed urethane resin is formed on the surface of the intermediate layer 10.

The soft coating layer 1b was prepared by spraying a urethane paint containing the blowing agent detailed in Example 1 and having block type HMD I as a main component on the surface of the intermediate layer.
As in Example 1, dehydration is performed by pre-drying to form an unfoamed coating film, and then a far-infrared heater is applied from the top side of the coating film for about 40 seconds so that the surface temperature reaches about 120°C. This is a foamed urethane resin coating layer with a thickness of approximately 200 μm, which is formed by foaming the above-mentioned foaming agent by irradiation and forming fine bubbles inside the coating film.

FIG. 4 is a partially enlarged view of FIG. 3, and shows that the soft coating film N1b made of foamed urethane resin is coated on the surface of the intermediate layer 10 which has been subjected to the flocking process, and there are many air bubbles 3 inside it. is formed, and the surface of the soft coating layer 1b has the soft feel and feel of the flocked hair itself constituting the intermediate layer 10, and the feel of the soft coating layer 1b is added.

Therefore, not only does it have a soft appearance, but it also feels different from flocked products.
It has a soft feel with a moist and slimy feel. Furthermore, compared to flocked products, the surface is covered with a soft coating film Jilb, so it has the advantage that it is difficult for dust to adhere to it, and it also has the advantage that it is difficult to cause dust due to the flocked Vile 8. There is.

Note that what is shown in FIG. 4 is only one example schematically representing this embodiment, and the length, thickness, type, flocking state, etc. of the bail B, viscosity of the paint, amount of application, and even foaming It goes without saying that the form changes in various ways depending on the type, content, degree of foaming, etc. of the agent.

Embodiment 3 Next, FIG. 5 shows an embodiment in which the present invention is applied to a center pillar garnish which is also an interior part of an automobile. In this example, the center pillar garnish base material 2 having a U-shaped cross section is obtained by injection molding ABS resin, and a suede-like soft coating layer 1c is formed on its surface. There is.

This suede-like soft coating layer 1c is obtained by further subjecting the soft coating layer 1a of Example-1, which was obtained by heating the foaming agent-containing urethane emulsion paint, to buffing with a wire brush. It is something that can be done.

That is, by performing the above buffing treatment, the surface of the soft coating layer 1a obtained in the above Example-1 is further roughened, resulting in a skin structure having a suede-like appearance. - It is possible to obtain a suede-like soft coating layer 1c with a unique slimy feel and texture different from those in 1 and 2.

In addition, by hot-pressing the surface of the soft coating layer 1a using a hot roll instead of buffing, a soft coating layer with a soft glossy, so-called silvered leather-like appearance can be obtained. It is possible to obtain a center pillar garnish having:

Example 4 Figure 6 shows another example in which the second invention is embodied in the center and lar garnish.The center pillar garnish with a U-shaped cross section used in this example is made of ABS resin. A nonwoven fabric is integrally attached to the surface of the base material 2 as an intermediate layer 10 by an in-mold molding method.

And on its surface is a buckskin-like soft coating layer 1d.
is formed.

The soft coating layer 1d is obtained by coating the foaming agent-containing urethane emulsion paint of Example 1 on a nonwoven fabric, and then applying the above-mentioned heating foaming treatment to the surface of the soft coating layer 1a, which is then coated with the wire brush. In addition to the soft texture and feel of the nonwoven fabric itself constituting the intermediate layer 10, the soft coating layer 1a whose surface has been roughened by the buffing process has the added feel of the soft coating layer 1a. has been done.

Therefore, it is possible to obtain a buckskin-like soft coating layer 1d that not only looks soft but also has a unique texture that is different from nonwoven fabrics and has a moist and slimy feel. .

Note that the present invention and the second invention are not limited to the above-mentioned embodiments, and for example, the following configuration may be adopted.

(1) The base material and core material of molded products are not limited to the above-mentioned ABS resin and PP resin, but also vinyl chloride resin, phenol resin,
Use polycarbonate resin and various other synthetic resins or rubber. In addition, for resins and rubbers to which urethane paints have difficulty adhering, apply a primer, flame treatment, or
Pretreatment such as plasma treatment or corona discharge may be performed.

(2) As the urethane paint, use is not limited to the emulsion type paint, but also a dispersion type, water-soluble type, or organic solvent type paint.

(3) In addition to the above-mentioned synthetic resins and rubber, metal and wooden molded products may be used as base materials for molded products.

In addition, when applying a urethane paint to these molded articles, pretreatment may be performed according to a conventional method as necessary.

(4) When applying the urethane paint to the molded product, the application method is not limited to spray coating, but may also be applied according to the shape of the molded product, such as flow coating or electrostatic coating. can do.

(5) In addition to the buffing treatment and hot press treatment, blasting treatment may be performed. Furthermore, in addition to performing these physical treatments alone, multiple treatments may be performed by appropriately combining them.

(6) Applicable not only to automobile interior parts but also to various types of residential interior decoration parts. That is, by appropriately selecting the pigments and dyes in the urethane emulsion paint, a product with a desired color can be obtained, and since urethane resin has excellent abrasion resistance and weather resistance, the product can be used in a wide range of applications.

(7) Applying a clear paint to the surface of each of the soft coating films of the first and second inventions for the purpose of further improving wear resistance and weather resistance.

(8) As the intermediate layer in the second invention, a woven fabric, a soft resin sheet, a foamed resin, a foamed rubber sheet, etc. may be used in addition to the flocked and nonwoven fabric of the above embodiments.

Effects of the Invention As detailed above, the decorative molded product of the present invention has a soft feel in appearance, and its surface has a soft yet moist and slimy feel. Therefore, it is an excellent invention that has unprecedented dryness and a high-grade material feel, and also has an anti-glare effect because external light is diffusely reflected on its surface.

In addition, in the second invention, the smooth and slimy feeling of the soft coating layer is added to the soft texture and texture of the soft material itself constituting the intermediate layer, resulting in a softer feel. It is a soft decorative molded product that has a skin structure that is even more decorative as it is molded, and is an excellent invention that has unparalleled dryness and a high-grade material feel.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention in an instrument panel, and FIG. 2 is a partially enlarged view thereof.
Fig. 3 is a sectional view showing one embodiment of the second invention in a console box lid, Fig. 4 is a partially enlarged view thereof, and Fig. 5 is an embodiment of the second invention in a center pillar garnish. FIG. 6 is a sectional view showing another embodiment in which the second invention is similarly embodied in a center pillar garnish. DESCRIPTION OF SYMBOLS 1... Soft coating layer, 2... Base material, 3... Bubbles, 8... Pile, 10... Intermediate layer. Patent applicant Yutaka 1) Synthesis Think Chemical Industry Co., Ltd. Agent Patent attorney Hironobu Onda Figure 5 1C Figure 6

Claims (1)

[Scope of Claims] 1. A molded product comprising a base material having a three-dimensional shape and a soft coating layer formed on the surface of the base material, the soft coating layer containing a foaming agent, By applying a urethane paint containing block isocyanate as a main component to the surface of the base material and heating it at a temperature higher than the foaming temperature of the foaming agent,
A soft decorative molded product characterized by being obtained by forming fine air bubbles inside the molded product. 2. The soft coating layer according to claim 1, wherein the soft coating layer is further subjected to at least one kind of physical treatment selected from buffing, blasting, and hot press treatment. Decorative molded products. 3. A molded article comprising a base material having a three-dimensional shape, an intermediate layer softer than the base material formed on the surface of the base material, and a soft coating layer formed on the surface of the intermediate layer, the molded product comprising: The soft coating layer is formed by coating the surface of the intermediate layer with a urethane paint containing a blowing agent and having blocked isocyanate as its main component, and heating the layer at a temperature higher than the foaming temperature of the blowing agent. A soft decorative molded product characterized by being obtained by forming fine bubbles in. 4. The soft coating layer according to claim 3, wherein the soft coating layer is further subjected to at least one kind of physical treatment selected from buffing, blasting, and hot press treatment. Decorative molded products.