JP2000343550A - Decorative molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molded article which can exhibit various designs represented with a parting plane-like tone and has transparent feeling and deep feeling and beautiful appearance. SOLUTION: A surface material 10 is a fiber-reinforced thermosetting resin molding material wherein 1-50 pts.wt. colored decorative pattern material and 20-55 pts.wt. reinforcing glass fiber with a mean cut length of 4.5-12.0 mm are incorporated to 100 pts.wt. transparent or translucent resin ingredient on which an unsatd. polyester resin is a main ingredient. A back side material 20 is a fiber-reinforced thermosetting resin molding material wherein values of the reinforcing glass fiber and the decorative pattern material are not specifically restricted. The surface material 10 looks as if the colored decorative pattern material 11 floats in the transparent resin and its deep feeling is increased by the colored back side material 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative molded product used for a bathtub, a waterproof pan for a washing place, a vanity stand, and the like.

[0002]

2. Description of the Related Art JP-A-59-108036 discloses a molding material for obtaining a fiber-reinforced decorative molded article having a stone-grained appearance (such as a bathtub or a vanity table).
There has been proposed a sheet molding compound (SMC) containing 0.5 to 20% by weight of a decorative pattern material made of a 16-mesh-sized flaky substance (mica piece, aluminum foil piece, polyester film piece, etc.).

[0003] In this case, in order to obtain a decorative molded product having an appearance similar to a natural stone tone, a relatively large amount of a decorative pattern material must be contained. Is manufactured by coating a paste-like raw material composition in a sheet form, so that the viscosity of the raw material composition increases and S
The production of MC is hindered. Moreover, since the paste-like raw material composition is coated by passing it through a doctor blade gap of about 1 mm, the size of the flaky material used is limited, and as a result, decoration such as stone-grain tone is monotonous. Becomes

Further, this type of SMC contains many materials having different refractive indices such as unsaturated polyester resin and reinforcing glass fiber, and the fiber opening of the glass fiber may not be sufficient. Lack of depth due to lack of character. In addition, since a relatively long glass fiber of about 1 to 1/2 inch is used, the flaky material is caught by the glass fiber during the flow during the hot pressing, and the density is unfavorably designed.

[0005] Japanese Patent Application Laid-Open No. 4-263942 discloses a technique in which a coating film is sprayed on the back surface of a transparent thermoplastic sheet by spraying a plurality of colors of paint, and the coating film seen through the transparent thermoplastic sheet has a deep feeling. There is also proposed a stone-grained molded product capable of obtaining the following. In this case, the thermoplastic sheet used as the surface material is transparent and has a sense of depth, but a molded article having an appearance more similar to a natural material has been required.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and provides a molded article which can express various designs represented by a stone-grained tone, and has a clear and deep feeling and a beautiful appearance. To provide.

[0007]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, 100 parts by weight of a transparent or translucent resin component containing an unsaturated polyester resin as a main component is colored. 1 to 50 parts by weight of decorative pattern material and glass fiber 2 for reinforcement having an average cut length of 4.5 to 12.0 mm
A surface material made of a fiber-reinforced thermosetting resin molding material containing 0 to 55 parts by weight and a colored back side material made of the fiber-reinforced thermosetting resin molding material are superimposed on each other. It is characterized by being formed by pressing.

(Explanation of Transparent or Translucent) The transparency of the fiber-reinforced thermosetting resin molding material of the surface material is such that the light transmittance is 1
It is preferably from 0 to 40%. If it is 10% or less,
The colored decorative pattern material is visible only on the surface, and the sense of depth is impaired. Further, since the light ray of 40% is transmitted too much, the back side material is transparent through the surface layer and the appearance is impaired. Further, in order to make the transparency as described above, the difference between the refractive index of the unsaturated polyester resin and the glass fiber for reinforcement is preferably 0.03 or less.

(Description of Fiber-Reinforced Thermosetting Resin Molding Material for Surface Material) In the present invention, as the fiber-reinforced thermosetting resin molding material for the surface material, the range of the content of the decorative pattern material and the glass fiber for reinforcement are used. Other than the length and the range of the content thereof, sheet molding compound (SMC) and bulk molding compound (BMC) are preferably used,
For the production of such SMC and BMC, a known raw material composition is used as it is. In addition, a well-known manufacturing method that is commonly used can be applied as it is to the manufacturing method of SMC and BMC.

(Description of Fiber-Reinforced Thermosetting Resin Molding Material for Back Side Material) In the present invention, sheet molding compound (SMC) and bulk molding compound (BMC) are used as the fiber-reinforced thermosetting resin molding material for the back side material. ) Is preferably used, and in the production of such SMC and BMC, a known raw material composition is used as it is. In addition, a well-known manufacturing method that is commonly used can be applied as it is to the manufacturing method of SMC and BMC.

That is, the fiber-reinforced unsaturated polyester resin molding material (SMC or BMC) is specifically prepared by adding, for example, an unsaturated polyester resin comprising an unsaturated polyester and a crosslinking vinyl monomer copolymerized therewith to a curing catalyst. A resin composition is prepared by mixing known compounding agents such as a chemical thickener, a resin for preventing shrinkage, an inorganic filler, an internal mold release agent, a stabilizer, and a pigment in an appropriate amount as necessary. Is mixed with a reinforcing glass fiber chop to form a bulk (in the case of BMC) or impregnated in a reinforcing glass fiber chop layer to form a sheet (in the case of SMC), which is subjected to a predetermined temperature and time. Aged and thickened. Since the same raw materials and compounding agents as those described in the description of the decorative bulk molding compound are used, the description is omitted here.

[0012] The fiber-reinforced thermosetting resin molding material of the back surface material may not contain the decorative pattern material, or may contain the decorative pattern material. When the decorative pattern material is contained in the fiber-reinforced thermosetting resin molding material, the cost increases accordingly, but the back side material made of the fiber-reinforced thermosetting resin molding material is subjected to the above-mentioned decoration during hot pressing. When mixed with the surface material made of BMC containing the pattern material, the change in the stone tone of the surface material becomes less noticeable. Further, from the viewpoint of moldability, it is preferable to use a sheet-like molding material (SMC) as the fiber-reinforced thermosetting resin molding material, and the thickness of these sheet-like molding materials (SMC) is usually 1 to 10
mm, but preferably 1 to 5 mm. If it is less than 1 mm, a molded product with sufficient strength cannot be obtained, and if it exceeds 10 mm, heat transfer from the molding die is not sufficient, resulting in poor curing.

The above-mentioned liquid unsaturated polyester resin includes unsaturated polybasic acids such as maleic anhydride and fumaric acid (when necessary, a saturated polybasic acid such as phthalic anhydride is used in combination); ethylene glycol; Propylenelen glycol, butylene glycol, unsaturated polyester obtained by reacting with a polyhydric alcohol such as diethylene glycol, styrene, vinyltoluene polymerized with this,
A liquid resin dissolved in a crosslinking vinyl monomer such as methyl methacrylate.

In particular, the unsaturated polyester resin preferably has an acid value of 2.0 to 5.0 mgKOH / g and a viscosity of 1
It is preferable to use one having 50 to 300 cps (25 ° C.). Here, the acid value and the viscosity are based on JIS K 6901.
Is measured based on

Conventionally, this type of BMC generally has an oxidation of 8 to 20 mg KOH / g and a viscosity of 500 to 2000 cps.
Unsaturated polyester resins having a high acid value (25 ° C.) and a high viscosity are widely used. In the present invention, such general-purpose unsaturated polyester resins may be used.
When a material having a low viscosity of 150 to 300 cps (25 ° C.) is used, high filling of reinforcing glass fibers can be achieved.
In addition, when a material having a low acid value such as an acid value of 2.0 to 5.0 mgKOH / g is used, the viscosity (hardness) after thickening is increased, particularly when the organic polyisocyanate is used for thickening. When this is used as a surface material and the backside material is overlapped and hot-pressed, the surface material and the backside material are less likely to be mixed.

(Explanation of Decorating Pattern Material) As the decorating pattern material, colored particles may be used. In particular, colored mica (white mica or black and white mica), colored aluminum flake,
A cut piece of a colored plastic film such as a colored polyethylene film, a vinyl chloride film, a polycarbonate film, and a polyester film, having an average size of 0.1 to 4.0 mm, preferably an average size of 0.1 to 2 mm. It is preferred to use a colored flaky material of 0.5 mm. When the average size of these materials is less than 0.1 mm, the decorative pattern material becomes inconspicuous and is inferior in design. vice versa,
If the average size exceeds 4.0 mm, the dispersion in the composition becomes poor and the quality is reduced. The thickness of the decorative pattern material depends on its size, but is preferably 5 to 50 μm, and more preferably 6 to 24 μm.

It is preferable to use a mixture of different sizes of such decorative pattern materials, rather than using only those having the same size, since a decorative molded article having a good design can be obtained. . In addition, as a natural stone tone, a marble tone or a granite tone is generally considered, and there are various types of stone tone such as whitish, blackish, and reddish. It is preferable to use two or more colors of decorative pattern materials in order to realize the stone texture of the present invention.

In particular, as the colored flaky material serving as the decorative pattern material, a cut piece of a colored plastic film such as a colored polyethylene film, a vinyl chloride film, a polycarbonate film, a polyester film, etc. Those having a thickness of 0.1 to 4.0 mm are preferably used. Such a colored flaky substance made of a cut piece of a colored plastic film is soft and is not crushed when mixed with a kneader or a kneader as compared with aluminum foil or mica.

The decorative pattern material is contained in an amount of 1 to 50 parts by weight based on 100 parts by weight of the resin component containing an unsaturated polyester resin as a main component. Here, the resin component containing an unsaturated polyester resin as a main component means the unsaturated polyester resin alone or, when a shrinkage preventing resin is blended, a mixture of the unsaturated polyester resin and the shrinkage preventing resin. I do. When the content of the decorative pattern material is 1 part by weight or less, the decorative pattern material is sparse and inconspicuous and inferior in design. On the contrary, the decorative pattern material is contained in more than 50 parts by weight. However, since the decorative pattern material sufficiently covers the surface of the molded product, there is no further change in appearance, and the decorative pattern material is expensive, which is economically undesirable.

In the case where the decorative pattern material is contained in an amount of 3 to 9 parts by weight, particularly when the bathroom floor material is formed, the pattern material is gathered on the back ribs, and the density is slightly increased, thereby deteriorating the design. . Also,
When the decorative pattern material exceeds 30 parts by weight, the dispersibility of the pattern material is slightly deteriorated, and the design property is deteriorated. Therefore, the decorative pattern material is preferably contained in an amount of 10 to 25 parts by weight. As described above, particularly when the decorative pattern material is contained in an amount of 10 to 25 parts by weight, the decorative pattern material sufficiently covers the surface of the molded product, and the decorative pattern material is densely packed, so that the decorative pattern material is designed. A beautiful decorative molded product resembling a natural stone tone can be obtained.

As the reinforcing glass fiber, a glass fiber chop having an average cut length of 4.5 to 12.0 mm is used. If the average cut length of the glass fiber is less than 4.5 mm, when the obtained BMC is used and cold-pressed and flattened, the flattened BMC may split or break apart. Poor handling (handling). Conversely, if the average cut length of the glass fiber exceeds 12.0 mm, when the BMC is flattened and handled, the decorating pattern material is caught by the glass fiber during hot-press molding, and the density of the pattern material is increased. In addition, a large load is applied to the kneader during the production of BMC, and the durability of the equipment is impaired.

(Explanation of Reinforcing Glass Fiber) The reinforcing glass fiber is contained in an amount of 20 to 55 parts by weight based on 100 parts by weight of a resin component containing an unsaturated polyester resin as a main component. When the content of the glass fiber is less than 20 parts by weight, the BMC is torn or broken, resulting in inferior handleability (handling property), and furthermore, inferior strength and low shrinkage of the obtained molded article. Conversely, when the content of the glass fiber exceeds 55 parts by weight, the impregnation of the glass fiber with the resin becomes insufficient, and streaks (glasses) of the glass fiber occur on the surface of the obtained molded article.

Examples of the curing catalyst include t-butylperoxybenzoate, t-butylperoxy-2-ethylhexanoate, t-butylperoxyoctoate, t-butylperoxyisopropyl carbonate,
Organic peroxides such as 1,1-di-t-butylperoxy-3,3,5-trimethylcyclohexanone may be used alone or in combination of two or more.

As the chemical thickener, for example, magnesium hydroxide, magnesium oxide, organic polyisocyanate (eg, tolylene diisocyanate, phenylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate) and the like are used. As the resin for preventing shrinkage, for example, a thermoplastic resin such as polystyrene, polyethylene, or styrene-maleic anhydride copolymer is used. As the internal release agent, for example, zinc stearate or calcium stearate is used. As the stabilizer, for example, hydroquinone, parabenzoquinone and the like are used.

Further, as the inorganic filler, for example, aluminum hydroxide, clay or glass powder is preferably used. Since such aluminum hydroxide, clay and glass powder have a refractive index close to that of the unsaturated polyester resin and the reinforcing glass fiber, the decorative pattern material at a deep position from the surface of the obtained decorative molded product can pass through. A visible and deep appearance is obtained. If a deep appearance is not particularly required, a common inorganic filler such as calcium carbonate may be used. Further, as the pigment, titanium dioxide, carbon black, phthalocyanine blue, red iron oxide, and the like are used.

Further, in the present invention, the above-mentioned decorative pattern material and the above-mentioned reinforcing glass fiber are contained with respect to the resin component containing the above-mentioned unsaturated polyester resin as a main component, and before the thickening, A bulk molding compound for decoration, which is flattened by compression and has a shear strength after thickening of 0.3 to 3.0 MPa, is also used.

Conventional molding material for decoration (BMC for decoration)
When it is flattened and handled, it may split or break apart, and may break due to flow during hot pressing. Therefore, BM for decoration
As a result of studying the composition of C and the like, this type of decorative BMC is thickened during its production. However, the BMC is compressed and flattened before the thickening, and the breaking strength after the thickening is 0.3. It has been found that the above-mentioned problem can be solved by adjusting the pressure to 3.0 MPa.

If the breaking strength after thickening is less than 0.3 MPa, when the decorative BMC is flattened and handled, the decorative BMC tears or separates, and also has a problem in hot pressing. Breakage due to the flow occurs, and a decorative molded article with good appearance cannot be obtained. Conversely, when the breaking strength after thickening exceeds 3.0 MPa, when the decorative BMC is flattened and handled, the decorative BMC does not tear or fall apart, but does not follow the mold inner surface. In addition, the decorative BMC is broken at the time of mold clamping, and the decorative molded product becomes white, and a decorative molded product having good appearance cannot be obtained. In particular, those having a breaking strength after thickening of 0.5 to 2.5 MPa are preferred, and more preferably 0.5 to 1.5 MPa.

Here, in order to compress and flatten the decorative BMC before thickening, for example, the decorative BMC before thickening obtained by mixing the compound with a general-purpose BMC manufacturing apparatus (kneader) is used. It is placed in a mold via a protective film such as a PET film, pressed at normal temperature at a pressure of 5 to 150 kg / cm2, preferably 30 to 100 kg / cm2, and then released from the mold. A method of removing the protective film and obtaining a compression-plated BMC for decoration is employed. The thickness of the decorative BMC compressed into a flat plate is 0.5 to 10 m.
m, preferably 1 to 5 mm. In the case where the BMC for decoration is compressed and flattened after thickening, the BMC for decoration becomes too hard and difficult to flatten depending on the composition.

In order to make the breaking strength of the decorative BMC after thickening (decorated BMC which has been compressed and flattened) 0.3 to 3.0 MPa, it is usually carried out by changing the composition of the decorative BMC. Specifically, use of unsaturated polyester resin having a low acid value and low viscosity, increasing the length and content of reinforcing glass fiber, increasing the amount of a thickener such as magnesium oxide, An organic polyisocyanate is used as an agent, or a styrene-maleic anhydride copolymer (containing at least 3% by weight of a maleic anhydride component) is used as a resin for preventing shrinkage.

The breaking strength is determined by cutting a compression-plated decorative BMC into a 150 mm long × 50 mm wide,
The short side is sandwiched between the chucks so that the distance between the fulcrums becomes 50 mm, and the pulling speed is 2 m using an autograph (made by Shimadzu Corporation).
This is the tensile stress at the time of breaking when a tensile test is performed at m / min.

(Description of Decorated Molded Article and Method of Manufacturing the Same)
The above bulk molding compound for decoration (BM
C) and fiber-reinforced thermosetting resin molding materials (SMC and BM
In order to obtain a decorative molded product having a stone tone using C),
For example, the following method is adopted.

That is, a hot-press molding machine having a mold composed of a concave movable upper mold and a convex fixed lower mold is used. The mold is about 50 to 120 ° C. for low-temperature molding, and about 50 to 120 ° C. for high-temperature molding. 1
After heating to 20 to 180 ° C., a predetermined amount of a bulk molding compound for decoration (BMC) is placed on a fixed lower mold, and a predetermined amount of a fiber-reinforced thermosetting resin molding material (SMC or BMC), and close the mold. When the movable upper die corresponds to the surface of the decorative molded product, the molding materials are stacked in the reverse order to the above.

The bulk molding compound for decoration (BMC) is compressed and flattened by a cold press, a hot press or the like before being placed in a mold, and the compressed and flattened fixed base Although it is particularly preferable to mount on a mold, it may be mounted on a fixed lower mold in a lump without flattening. Although the bulk molding compound for decoration (BMC) does not have good heat fluidity at the time of hot pressing, the use of the BMC for flattening which has been flattened in advance makes it possible to obtain the hot fluid at the time of hot pressing. Is improved.

Thereafter, in low pressure molding, about 1 to 20 kg / c
In the case of high-pressure molding at a pressure of about 20 to 150 kg / cm @ 2, the pressure is applied for about 30 seconds to 20 minutes, heat curing is performed, the mold is opened, and the molded article is released. In this way, a beautiful decorative molded product having a stone tone (marble tone or granite tone) (for example,
Bathtub, waterproof pan, vanity table, kitchen counter, etc.). It is preferable that the surface layer of the decorative molded product has a depth of 1.5 mm or more because it has a sense of depth. Further, the transparency of the decorative molded product is preferably 4 mm in thickness and 3% or more in total light transmittance.

The decorative bulk molding compound (BMC) is placed in a mold so as to be a surface material of a decorative molded product. The size of the bulk molding compound for decoration (BMC) may be any size necessary for decorating the molded product, and the entire surface of the molded product may be decorated, and a part of the surface of the molded product may be decorated. May be decorated. When decorating the entire surface of a molded product, it is better to charge the decorating bulk molding compound (BMC) as much as possible to the decorating surface and form while evacuating the inside of the mold. A layer is formed, and a molded article having high design without pinholes or the like is obtained.

Also, a bulk molding compound (BMC) for decoration and a fiber-reinforced thermosetting resin molding material (SMC)
MC or BMC) may be stacked with a sheet-like separating material interposed therebetween, and then hot-pressed in a mold in the same manner as described above. Here, paper, cloth,
Non-woven fabric, plastic film, glass cloth, and glass mat are used. In particular, the basis weight of 100 to 400 g
/ M @ 2 nonwoven fabric or glass mat is preferably used.
If the basis weight is small, tearing or elongation occurs during hot pressing, whereas if the basis weight is large, air bubbles may be included and the cost is increased.

As described above, when the sheet-like separating material is used, mixing and bleeding of the resin component of the surface material and the resin component of the backing material are prevented, and the boundary between the decorative surface and other portions is prevented. Can be obtained, and the strength of the decorative molded product can be improved.

The surface material of the present invention uses a relatively large amount of glass fiber having a cut length relatively longer than the cut length of the reinforcing glass fiber used for the conventional BMC. When this is used, when it is cold-pressed and flattened by compression, the compressed and flattened BMC does not tear or fall apart, and handling (handling) is improved. Further, the glass fiber contained in a relatively large amount has a remarkably small shrinkage ratio, and therefore, the obtained BMC exhibits low shrinkage, and is used as a decorative material obtained by using the surface material as a surface material and superimposing it on a backside material to form a hot-press. There is no warpage in the molded product. Also, the strength is improved.

Particularly, the viscosity (viscosity of 150 to 30) is lower than that of the unsaturated polyester resin generally used for the conventional BMC.
0 cps), high filling of reinforcing glass fiber is possible, and the low shrinkage of BMC is further improved,
The obtained decorative molded product does not warp. In addition, conventional B
When a resin having an acid value (acid value 2.0 to 5.0 mgKOH / g) lower than that of the unsaturated polyester resin generally used for MC is used, particularly when the viscosity is increased with an organic polyisocyanate, The viscosity (hardness) can be increased, and when this is used as the surface material and the backside material is stacked and hot-pressed, the surface material and the backside material are less likely to be mixed.

The decorative bulk molding compound (BMC) is not coated on a carrier film with a doctor blade unlike the production of a sheet molding compound (SMC). A pattern material can be used, so that a decorative molded article excellent in design can be obtained. Furthermore, the kneading at the time of manufacturing the BMC sufficiently opens the glass fiber, so that a decorative molded product having good transparency and depth can be obtained.

Also, the decorative bulk molding compound (BMC) is not manufactured by coating a carrier film on a carrier film, unlike the sheet molding compound (SMC), so that the viscosity of the raw material composition increases. Does not hinder the production of BMC. Therefore, the decorative pattern material can be contained in a relatively large amount, and the decorative pattern material is densely contained, and the decorative pattern material is beautifully similar to a natural stone grain (such as marble or granite). A molded article is obtained.

Also, since the surface material made of the bulk molding compound for decoration and the back material made of the fiber-reinforced thermoplastic resin molding material are overlapped and pressure-formed, only the front layer of the molded product is decorated and the back material is formed. The layers are not decorated. As a result, the amount of decorative sheet molding compound required for decoration can be reduced, and the amount of expensive decorative pattern material also decreases, and the use of a backing material made of general-purpose and inexpensive molding material. Thereby, a decorative molded product can be obtained at low cost.

Furthermore, since the surface material contains 20 to 55 parts by weight of reinforcing glass fiber having an average cut length of 4.5 to 14.0 mm, the fluidity during hot pressing is lower than that of conventional BMC. The fluidity during hot pressing is smaller than that of the backing material, so that the surface material and the backing material are not easily mixed, and when the surface of the molded product is partially decorated, it is not decorated with the decorative portion. The boundary with the part does not become unclear, and when decorating the entire surface of the molded product, the back side material does not seep to the surface material side, so the appearance of the decorative molded product Is prevented from decreasing. Furthermore, this surface material has low shrinkage like a back material made of a general-purpose fiber-reinforced thermosetting resin molding material such as SMC. The decorative molded product obtained by molding also has low shrinkage, and the occurrence of warpage due to a large difference in shrinkage between the surface material and the backside material is suppressed.

In particular, when there is a step between the embossed surface of the molding die and the periphery thereof, the decorated front side layer is formed by sandwiching the sheet-like separating material between the above surface material and the back side material. And the backside layer are separated from each other to prevent the decoration material from being disturbed due to migration between the molding materials of the two layers. Goods are obtained. Further, the strength of the molded product is improved.

Further, in the present invention, the above-mentioned decorative pattern material and the above-mentioned reinforcing glass fiber are contained in the resin component containing the above-mentioned unsaturated polyester resin as a main component, and are compressed before thickening. A material using a bulk molding compound for decoration (BMC) having a breaking strength of 0.3 to 3.0 MPa after thickening after being thickened is torn or broken during handling. Nothing. Also,
Breakage due to flow during hot pressing is also prevented.

[0047]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples and comparative examples of the present invention are shown below. (Example 1) <Preparation of surface material (BMC)> 70 parts by weight of an unsaturated polyester resin obtained by dissolving an isophthalic unsaturated polyester having a number average molecular weight of 8,300 in a styrene monomer (styrene monomer concentration: 40% by weight); Number average molecular weight 120,
Anti-shrinkage resin obtained by dissolving 000 polystyrene in styrene monomer (styrene monomer concentration 50% by weight) 3
0 parts by weight, 1 part by weight of a curing catalyst (t-butyl peroxybenzoate), 180 parts by weight of an inorganic filler (aluminum hydroxide having an average particle diameter of 8 μm), 1 part by weight of a chemical thickener (magnesium oxide), zinc stearate 5 parts by weight, 35 parts by weight of reinforcing glass fiber (glass fiber chop having an average cut length of 6 mm) and a small amount of a gray pigment were blended.

Further, 20 parts by weight of a decorating pattern material (each having a thickness of 12
μm colored polyester film fragment), and the resulting mixture was mixed with a conventional BMC manufacturing device (kneader), mixed with a conventional BMC manufacturing device (kneader), and cold-pressed using a press machine. After pressing and compression flattening, it was aged at 40 ° C. for 2 days to produce a bulk molding compound for decoration (BMC).
The thickness of the obtained decorative BMC was about 3 mm.

Decorating pattern material (20 parts by weight) White: size (average) 0.2 mm (4 parts by weight), size (average) 1.5 mm (4 parts by weight), size (average)
0 mm (2 parts by weight) Black: Size (average) 0.2 mm (3 parts by weight), Size (average) 1.0 mm (3 parts by weight) Gray: Size (average) 0.5 mm (2 parts by weight) , Size (average) 1.5 mm (2 parts by weight)

<Preparation of Backside Material (SMC)> 100 parts by weight of an unsaturated polyester resin composed of 60 parts by weight of a general-purpose unsaturated polyester having a number average molecular weight of 3,500 and 40 parts by weight of a styrene monomer were added to a curing catalyst (t- 1 part by weight of butyl peroxybenzoate), an inorganic filler (average particle size: 10
160 parts by weight of calcium carbonate (μm), 1 part by weight of a chemical thickener (magnesium oxide), 5 parts by weight of zinc stearate and a small amount of a gray pigment were blended to prepare a paste of a resin composition.

Using a conventional SMC manufacturing apparatus, a paste of the above resin composition is applied to one surface of one carrier film (polyethylene film), and a paste of the above resin composition is applied to one surface of the other carrier film. ,
The coated surfaces of both carrier films are sandwiched between glass fiber chop layers (fiber length 1 inch), and the glass fiber chop layers are impregnated with the above-mentioned pastes and aged at 40 ° C. for 2 days. Thicken 3mm thick
A sheet molding compound (SMC) containing no decorative pattern material was prepared. The content of the glass fiber chop was adjusted to be 25% by weight of the whole.

<Hot-Press Molding of Decorative Molded Product> A conventional waterproof mold having a concave movable upper die and a convex fixed lower die with an emboss (length 1170 mm × width 870 mm × thickness 4 mm). After heating the movable upper mold to 125 ° C. and the fixed lower mold to 145 ° C. using a hot-pressing machine, the decorative BMC (surface material) compressed and flattened into the fixed lower mold (charge rate: 1)
00%), sheet-like separating material (glass continuous strand mat 400 g / m 2) (charge rate 98%),
An SMC (back side material) not containing the decorative pattern material (charging rate 60%) is placed in this order in a stacked manner, the movable upper mold is lowered, and the mold is closed while the inside of the mold is suctioned and deaerated. Speed 0.
The mold is closed at a rate of 8 mm / sec, and then pressurized at a pressure of 65 kg / cm @ 2 for 10 minutes, the surface material and the back side material are thermoset to be integrally molded, and the mold is opened to release the molded product.
Thus, a decorative molded product (waterproof pan) was obtained.

The decorative molded article had no irregular (mottled) appearance defects on the surface and no surface defects such as pores, microcracks, sink marks and undulations. Then, as shown in the perspective explanatory view of the molded article of the present invention in FIG.
The colored backing material 2 has an appearance in which a colored decorative pattern material 11 floats in a transparent or translucent resin.
With 0, the feeling of depth increased, and the decorative molded article had a beautiful stone-grained appearance.

[0054]

As described above, according to the present invention, the surface material has such an appearance that the colored decorative pattern material floats in a transparent or translucent resin, and the colored back side material is used. It is possible to obtain a decorative molded product that has an increased sense of depth and can exhibit a design having an appearance more similar to a natural material.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing a molded product of the present invention.

[Explanation of symbols]

 Reference Signs List 10 surface material 11 decorative pattern material 20 back side material

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Claims (1)

[Claims] 1 to 50 parts by weight of a colored decorative pattern material and 100 parts by weight of a transparent or translucent resin component containing an unsaturated polyester resin as a main component, and an average cut length of 4.5. A surface material made of a fiber-reinforced thermosetting resin molding material containing 20 to 55 parts by weight of reinforcing glass fiber of １12.0 mm; and a colored back material made of a fiber-reinforced thermosetting resin molding material. A decorative molded product characterized by being laminated by hot pressing in a mold.