JP2014184726A - Decorative sheet, simultaneous injection molding decorative method and decorative molding article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a mat design with transparent feeling to an adherend such as a resin molding body, without causing malformation of a decorative sheet, low moldability, elimination of mat feeling or a white blush mark, or without causing a cost rise of a molding tool, in decorative molding such as a simultaneous injection molding decorative method.SOLUTION: A decorative sheet S is used which includes: a first resin substrate sheet 1 made of fluororesin with a matting agent added, having a mat surface and being transparent; a second resin substrate sheet 2 made of acrylic resin having no matting agent and being transparent; and if appropriate, a decorative layer 4 and an adhesive layer 5, laminated from a surface in this order. In decorative molding, an adherend such as resin molding products is decorated by simultaneous injection molding decoration or the like and produces a decorative article such as a decorative molding article.

Description

  The present invention relates to a technique for decorating the surface of various articles. More specifically, as a laminated type decorative sheet suitable for decorative molding such as simultaneous injection molding, a decorative sheet capable of imparting a matte design to the surface of a decorative molded product, and the sheet were used. The present invention relates to an injection molding simultaneous decoration method and a decorative molded product.

  Conventionally, decorative products in which a decorative sheet is laminated and decorated on the surface of an article such as a resin molded product have been used for various purposes. And as a decoration method which shape | molds and uses a decoration sheet | seat, for example, Japanese Patent Publication No. 50-19132 (for example, refer patent document 1), Unexamined-Japanese-Patent No. 11-91041 (for example, refer patent document 2) etc. In this method, there is a method of simultaneous decorating injection molding, and in this method, a decorative sheet is molded on the surface at the same time as molding of a resin molding, and then laminated and integrated to decorate the surface. A molded product is obtained.

  Then, when a matte feeling is required on the surface, for example, the following method is used. (1) In the case of the injection molding simultaneous decorating method, the decorating sheet itself is not added with a matting agent, and irregularities such as a drawing are provided on the mold surface of the injection mold. And since the unevenness | corrugation of a mold surface is shape | molded on the surface of a decorating sheet which contacts this mold surface at the time of shaping | molding, it makes the surface of a decorative molded product (decorative sheet) matt as an uneven surface. (2) Use a decorating sheet with no matting agent added to the surface in advance by embossing or the like to create irregularities. (3) A matting agent is added to the base sheet to make the decorating sheet itself matte.

Japanese Patent Publication No. 50-19132 Japanese Patent Laid-Open No. 11-91041

  However, in the method of (1) above, the surface gloss adjustment (matte, low gloss) can be made by unevenness such as drawing in the injection molding simultaneous decorating method, but there are two types of products: matte product and mirror surface product. In the case of manufacturing, at least two injection molds (at least the cavity surface portion) are required, which raises a problem of increasing costs. In the above method (2), when the decorative sheet is formed by vacuum forming or the like, the heat of softening the sheet returns the irregularities on the surface of the decorative sheet, and the matte surface disappears. Can no longer be granted. Further, in the case of simultaneous injection molding, the matte disappearance is more likely to occur because the unevenness is restored even by the heat pressure of the resin during injection molding. In the method (3), the amount of the matting agent (mixing ratio) to the base sheet increases in order to make the surface matte. However, in that case, the decorative sheet used for injection molding or the like has a thickness of about 100 to 300 μm, so that the amount of accumulated diffused light in the thickness direction increases and the appearance becomes whitish (whitening). It becomes brittle and the formability of the decorative sheet decreases. However, when the thickness of the base sheet is extremely thin, there has been a problem that molding defects such as wrinkles or tearing are insufficient at the time of molding.

  That is, the object of the present invention is to form a decorative sheet and decorate the adherend in a matte manner, whitening (decrease in transparency) of the decorative sheet itself, poor molding (wrinkles and tearing), moldability It is to give a matte design without causing a drop and loss of matte feeling. Furthermore, when the decoration method is simultaneous injection molding, a matte design is imparted without causing an increase in cost of the injection mold.

  Therefore, in order to solve the above problems, the decorative sheet of the present invention is a fluororesin in which a matting agent is added in order from the surface in a decorative sheet for molding, in a decorative sheet used for simultaneous injection molding. The first resin base sheet transparent with matte surface and a transparent second resin base sheet made of acrylic resin with no matting agent are laminated.

  Thus, the base material sheet contains a matting agent to give a matte design (first resin base material sheet), and a layer that maintains the moldability without containing the matting agent ( The second resin base sheet) and the layer containing the matting agent (first resin base sheet) have the resin as a fluororesin, so the slipperiness and durability of the resin Even with a thin film (the first resin base sheet), it is possible to prevent the matting agent from falling off and the layer itself from being worn. For this reason, the layer (second resin base sheet) that maintains moldability can be thickened to secure the main thickness of the decorative sheet here, and the resin of this layer is an acrylic resin. The moldability is maintained by its thermoplasticity. Moreover, since the transparency and easy adhesion property of the acrylic resin can be utilized, the appearance of the decorative sheet can be prevented from being whitened even if a matting agent is used. Further, since the matting is performed by adding a matting agent, the matting is not lost during molding. As a result of the above, when the decorative sheet is used to decorate the adherend by molding the sheet, the decorative sheet is not poorly formed (wrinkles and tears), the formability is reduced, and the matte feeling is not lost. A matte design can be given. In addition, since the mat is matted, the decorative sheet itself is kept transparent without whitening, and the mat can be decorated with a matte transparency. Moreover, if this decorative sheet is applied to simultaneous injection molding, the decorative sheet itself can give a matte design, so the cost of the injection mold is higher than when the matte surface is shaped with an injection mold. A matte design can be given by avoiding the rise.

  In the injection molding simultaneous decorating method of the present invention, the decorative sheet is inserted between both male and female molds with the second resin base sheet side facing the injection resin side, and then both molds are molded. A decorative molded product in which a resin in a fluid state is injected into a cavity formed by both molds, the resin is solidified, the mold is opened, and the decorative sheet is laminated on the surface of the resin molded product The method was to get

  Thus, since it shape | molds using the said decorating sheet of this invention, the effect of the decorating sheet mentioned above is acquired, As a result, the cost rise of an injection mold, a molding defect (a wrinkle and tearing), and a moldability fall It is possible to give a matte design having a transparent feeling without causing a loss of matte feeling and whitening.

  In addition, the decorative molded product of the present invention includes a transparent second resin base sheet made of an acrylic resin with no matting agent added on the resin molding and a surface matting of a fluororesin added with a matting agent. The transparent first resin base sheet is laminated in this order.

  By adopting such a configuration, the decorative molded product becomes a product obtained by using the decorative sheet of the present invention or the injection molding simultaneous decorating method of the present invention, and the decorative sheet described above. Or it becomes the molded product which can enjoy the effect by the injection molding simultaneous decorating method. In other words, it is a matte design that can prevent the increase in the cost of injection molds, molding defects (such as wrinkles and tears), moldability, loss of matteness, and whitening (decrease in transparency) that occur during manufacturing. It becomes a molded product.

(1) According to the decorative sheet of the present invention, a matte design can be imparted without causing molding defects (such as wrinkles or tears), moldability degradation, and loss of matting feeling. In addition, since the mat is matted, the decorative sheet itself is kept transparent without whitening, and the mat can be decorated with a matte transparency. Moreover, if this decorative sheet is applied to simultaneous injection molding, the decorative sheet itself can give a matte design, so the cost of the injection mold is higher than when the matte surface is shaped with an injection mold. A matte design can be given by avoiding the rise.
(2) Moreover, according to the injection molding simultaneous decorating method of the present invention, the effect of the decorative sheet of the present invention can be obtained, the cost of the injection mold is increased, the molding is poor (wrinkles and tears), the moldability is reduced, A matte design with a transparent feeling can be imparted without causing a loss of matte feeling and whitening.
(3) Moreover, according to the decorative molded product of this invention, the effect by the said decorating sheet thru | or the injection-molding simultaneous decorating method can be enjoyed. In other words, it is a matte design that can prevent the increase in the cost of injection molds, molding defects (such as wrinkles and tears), moldability, loss of matteness, and whitening (decrease in transparency) that occur during manufacturing. It becomes a molded product.

Sectional drawing which illustrates one form of the decorating sheet of this invention. The conceptual diagram explaining the injection molding simultaneous decorating method of this invention with the form. Sectional drawing which illustrates one form of the decorative molded product of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Decorating sheet: First, the decorating sheet will be described.

  [Summary] One embodiment of the decorative sheet of the present invention is illustrated in the sectional view of FIG. The decorative sheet S in the figure is, in order from the surface, a first resin base sheet 1 that is transparent with a matte surface made of a fluororesin to which a matting agent a is added, and a transparent resin that is made of an acrylic resin without a matting agent. The second resin base sheet 2 is laminated, and the decorative layer 4 and the adhesive layer 5 are laminated in this order on the surface of the second resin base sheet 2 on the back side. It is a decorative sheet. The decorative layer 4 and the adhesive layer 5 are layers that are appropriately provided as necessary. The decorative sheet S of the present invention includes the first resin base sheet 1 and the second resin base sheet 2 as essential layers. A matte design is imparted by the first resin base sheet 1 on the front side, and moldability and the like are maintained by the second resin base sheet 2 on the back side. The specific first resin base sheet 1 and the specific second resin base sheet 2 constitute a base sheet 3.

  In addition, the decorative sheet of the present invention may be appropriately provided with a decorative layer 4, an adhesive layer 5 and the like in addition to the first resin base sheet 1 and the second resin base sheet 2 which are essential layers. However, other than these, although illustration is omitted, for example, interlayer adhesion is improved between the first resin base sheet 1 and the second resin base sheet 2, between the second resin base sheet 2 and the decorative layer 4, and the like. It is good also as a structure etc. which provided the primer layer for this.

  [First and Second Resin Base Sheets] In the present invention, the base sheet 3 is composed of a first resin base sheet 1 and a second resin base sheet 2. The first resin base sheet 1 made of a transparent fluororesin to which the matting agent a is added is disposed on the surface of the base sheet 3 (the surface exposed to the outermost surface in a state of being laminated on the adherend). As a result, the matte design on the surface can be better maintained by the matte surface and the abrasion resistance and heat and chemical resistance of the fluororesin. As a result, compared with the case where other resins are used, the first resin base sheet can be made thinner while maintaining the matte design. And the 2nd resin base material sheet 2 which consists of a transparent acrylic resin without a matting agent addition is arrange | positioned at the back surface side of the base material sheet 3. FIG. This imparts transparency, moldability (thermoplasticity), and easy adhesion to the adherend. In addition, since the first resin base sheet can be formed into a thin film by using a fluororesin, the second resin base sheet can be used as a decorative sheet to mainly bear the total thickness required.

  The thickness of the first resin base sheet may be set according to the required matting degree, and generally the performance is often satisfied when the thickness is 50 μm or less. The minimum thickness of the first resin base sheet is preferably larger than the average particle diameter of the matting agent and about 10 μm or more from the viewpoint of film formability and film strength.

  On the other hand, as the thickness of the second resin base sheet to which no matting agent is added, the total thickness necessary for maintaining the moldability as a decorative sheet, including the thickness of the first resin base sheet, etc. What is necessary is just to ensure, and generally it is the range of about 50-200 micrometers.

  The matting agent a added to the fluororesin in the first resin base sheet is not particularly limited, but examples thereof include inorganic substances such as silica, alumina, calcium carbonate, aluminosilicate, barium sulfate, polyethylene, Particles made of an organic polymer such as urethane resin, polycarbonate, and polyamide (nylon) are used. The average particle diameter of the particles is about 1 to 10 μm, and the addition amount is about 5 to 30% by mass. In addition, the shape of particle | grains is a polyhedron, a spherical form, scale shape, etc.

  In addition, in order to laminate the first resin base sheet and the second resin base sheet, in particular, the fluororesin is poor in chemical easy-adhesiveness. A method of co-extrusion from a T die and fusing both sheets simultaneously with film formation is preferred. In addition to this, a sheet that has already been formed once is used, and the adhesive surface is subjected to surface easy adhesion treatment such as corona discharge treatment and plasma treatment to generate polar functional groups such as hydroxyl groups and carboxyl groups on the adhesion surface, and wettability. In addition, it can be laminated by a dry lamination method through an adhesive layer such as a two-component curable urethane resin or an epoxy resin.

  The fluororesin used for the first resin base sheet is polyvinyl fluoride, polyvinylidene fluoride, ethylene-4 fluoroethylene copolymer, polychloroethylene trifluoride, tetrafluoroethylene-6 fluoropropylene copolymer. A polymer or the like can be used. In addition, in the range which does not impair abrasion resistance and heat-resistant chemical resistance, an acrylic resin may be added to about 20 mass% at maximum, and easy adhesion with the 2nd resin base material sheet of an acrylic resin may be improved.

  Examples of the acrylic resin used for the second resin base sheet include polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, Ethyl (meth) acrylate-butyl (meth) acrylate copolymer, methyl (meth) acrylate-styrene copolymer, methyl (meth) acrylate-2hydroxyethyl (meth) acrylate copolymer, methyl (meth) acrylate-ethylene A resin composed of a homopolymer of an alkyl (meth) acrylate monomer such as a copolymer, or a copolymer with another monomer can be used alone or in admixture of two or more.

  [Decorative layer] The decorative layer 4 is appropriately provided as necessary. The decoration layer 4 is a layer that typically represents a pattern such as a pattern or a character. Although the pattern is arbitrary, for example, wood grain, stone grain, cloth grain, sand grain, geometric pattern, characters, symbols, full-color solids, and the like are used alone or in combination of two or more. The decoration layer may be formed by a conventionally known formation method or material, such as a printing method such as gravure printing, silk screen printing, or offset printing. Further, a metal thin film layer or the like in which a metal such as aluminum or chromium is partially or entirely formed by a known vapor deposition method is also used as a decoration layer.

  The ink for forming the decorative layer is composed of a vehicle composed of a binder and the like, a colorant such as a pigment and a dye, and various additives appropriately added thereto. Examples of the binder resin include acrylic resin, vinyl chloride-acetic acid. One type of resin selected from vinyl copolymers, polyester resins, cellulosic resins, chlorinated polypropylene, urethane resins, polyamide resins and the like, or two or more types of mixed resins are used. Examples of the colorant include titanium white, zinc white, carbon black, iron black, dial, cadmium red, ultramarine, cobalt blue, yellow lead, titanium yellow, and other inorganic pigments, phthalocyanine blue, indanthrene blue, Organic pigments such as indolinone yellow, benzidine yellow, quinacridone red, perylene red, metal powders such as aluminum and brass or metal pigments such as scales, pearlescent pigments such as titanium dioxide-coated mica powder or scales, or A dye or the like is used.

  When the decorative layer is printed by being in contact with the second resin base sheet, the first resin base sheet is made of an acrylic resin as the resin for the ink binder to be used, and thus the acrylic resin is a preferred resin. The acrylic resin is appropriately selected from those listed in the first resin base sheet, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl. (Meth) acrylate, alkyl methacrylate (meth) acrylate such as octyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) An acrylic polyol obtained by copolymerizing a (meth) acrylic acid ester having a hydroxyl group in a molecule such as acrylate can also be used.

  In addition, the decoration layer can use the first and second resin base sheets as protective sheets, and as shown in the configuration illustrated in FIG. 1, the back side of the first resin base sheet 2 (resin molded product side) and Although the structure to perform is common, you may provide in the surface side of the 1st resin base material sheet 1, or between the 1st resin base material sheet 1 and the 2nd resin base material sheet 2, etc. FIG. For example, in addition to the configuration of FIG. 1 or for the configuration consisting of only the first resin base sheet 1 and the second resin base sheet 2, the matte surface of the first resin base sheet 1 is matted. For example, a decorative layer may be provided in a thin or pattern shape as long as the unevenness for the purpose is not impaired (not shown).

  Moreover, as a decoration layer, the layer which provides functionality, such as an invisible pattern or electroconductivity other than the layer which expresses visible patterns, such as a pattern, a character, and a figure, may be sufficient. For example, it is a layer containing a conductor, an antistatic agent, a phosphor, a magnetic material, an infrared absorber, an ultraviolet absorber and the like. If an ink containing these substances is used instead of the colorant, these layers can be formed.

  [Adhesive layer] The back side of the decorative sheet is easily adhered by corona discharge treatment, plasma treatment, primer coating, etc., as necessary, in order to improve the adhesion to adherends such as resin moldings. In addition to the treatment, the adhesive layer 5 may be provided after or without the easy adhesion treatment. As the adhesive layer 5, for example, a known resin such as a thermoplastic resin or a thermosetting resin is used as a heat-sensitive adhesive. In the thermoplastic resin, for example, one or a mixture of two or more of acrylic resin, chlorinated polyolefin resin, vinyl chloride-vinyl acetate copolymer, thermoplastic urethane resin, thermoplastic polyester resin, polyamide resin, rubber resin, etc. Is used. In the thermosetting resin, a urethane resin, an epoxy resin, or the like is used. The adhesive layer is formed by known printing or coating methods such as gravure printing, roll coating, and the like using an adhesive made of these resins. The thickness of the adhesive layer is not particularly limited, but is usually about 1 to 100 μm. In the adhesive layer, colorants as listed in the decoration layer may be added.

  [Lamination method of the decorative sheet on the adherend] As a method of laminating the present decorative sheet on the adherend, a method in which heat and pressure are applied to the decorative sheet during lamination is a feature of the decorative sheet of the present invention. Of course, the decorative sheet of the present invention may be used in other lamination methods. Of course, in either case, the second resin base sheet side is the adherend side with respect to the first resin base sheet. By stacking the decorative sheet on the adherend, a decorative article is obtained as a laminate of the adherend and the decorative sheet.

  Examples of the laminating method in which hot pressure is applied to the adherend when laminating a decorative sheet include, for example, (1) injection molding simultaneous decorating method, (2) vacuum forming laminating method, and (3) laminating method using an elastic roller. Etc. Since (1) will be described in detail later, the lamination method of (2) and (3) will be further described here.

  The vacuum forming and laminating method (2) is a three-dimensional object such as a molded product as described in JP-B-56-45768 (overlay method), JP-B-60-58014 (vacuum press method) and the like. This is a method in which a decorative sheet is opposed or placed on the surface of an adherend with an adhesive in between, and the decorative sheet is laminated on the adherend by at least pressure from the adherend side by vacuum suction. In the lamination method using the elastic roller of (3), the decorative sheet is opposed to or placed on the plate-shaped adherend with an adhesive interposed therebetween, and the elastic roller is provided from the decorative sheet side. Pressure is applied and the decorative sheet is laminated on the adherend. For columnar adherends such as cylinders and polygonal columns, as described in Japanese Patent Publication No. 61-5895, Japanese Patent Publication No. 56-23377, etc., the long axis direction of the columnar adherend is described. In addition, while supplying the decorative sheet through the adhesive layer in between, the plurality of side surfaces constituting the adherend are sequentially decorated by a plurality of rollers having different directions (including the case where the elastic roller is not used). There is also a wrapping method in which sheets are pressure-bonded and decorative sheets are laminated.

  Injection molding simultaneous decoration method: The injection molding simultaneous decoration method of the present invention uses the above-described decorative sheet of the present invention to form a decorative sheet on the surface of a resin molded article by the so-called injection molding simultaneous decoration method. Then, it is a method of obtaining a decorative molded product decorated with a matte design with the decorative sheet.

  The injection molding simultaneous decorating method refers to a method in which a decorative sheet is inserted between both male and female molds as described in Japanese Patent Publication No. 50-19132 and Japanese Patent Publication No. 43-27488. The mold is clamped, a resin in a fluid state is injected into a cavity formed by both molds and solidified, and a decorative molded product is obtained by laminating a decorative sheet on the surface simultaneously with the molding of the resin molded product. .

  The injection molding simultaneous decorating method of the present invention can take various forms in the conventionally known injection molding simultaneous decorating method except that the above-described decorative sheet of the present invention is used as the decorative sheet to be used. . For example, basically, either a form in which a decorative sheet is preformed or a form in which it is not performed may be used. Further, the decorative sheet may or may not be preheated. In addition, at the time of preforming, the decorative sheet is usually preheated. However, in order to make the best use of the effect of the decorative sheet of the present invention, the decorative sheet is preferably formed in any way.

  Needless to say, when the decorative sheet has a large aperture, it is preferable to perform preforming. On the other hand, in the case where the decoration sheet has a small aperture, the decoration sheet may be formed only by the resin pressure of the injected resin in a fluid state. At this time, if the drawing is shallow, the decorative sheet may be molded only with the resin pressure of the resin in a fluid state filled in the mold at the same time as the resin injection without preforming. Even when the decorative sheet is molded with resin pressure, the decorative sheet may use the heat of the injection resin without preheating. In addition, the preforming of the decorative sheet is usually performed by using the injection mold as a vacuum mold, but before supplying the decorative sheet between the molds, decorate with another vacuum mold outside the mold. Pre-forming (off-line pre-forming) such as vacuum forming a sheet may be used. However, the pre-molding is preferably performed in the form of using both an injection mold and a vacuum mold because the decorative sheet can be laminated efficiently and accurately. However, when the preformed decorative sheet is manufactured in advance in another place, the preforming is preferably in the form of off-line preforming. In the description of the present invention, vacuum forming includes vacuum / pressure forming.

  With reference to the conceptual diagram of FIG. 2, the injection molding simultaneous decorating method of the present invention will be described in one form. The form described here is a form in which the decorative sheet is heated and softened between the molds and pre-molded by vacuum molding with an injection mold before the mold is clamped, and then the mold is clamped and the resin is injected. . Moreover, this form is a more preferable form when the decoration sheet | seat is deeply drawn in the above-mentioned various combinations of pre-molding and preheating of the decorative sheet. Moreover, it is also one of the forms which can make use of the effect of the decorating sheet of the present invention. Of course, the decorative sheet used in the injection molding simultaneous decorating method of the present invention may be either a single sheet or a continuous strip.

  First, as shown in FIG. 2 (A), as an injection molding die, a mold Ma having a runner communicating with the injection nozzle and a gate (gate), a suction hole 41 on the cavity surface, and a sheet preforming. A pair of molds of a mold Mb that also serves as a mold is used. These molds are made of metal such as iron or ceramics. In the mold open state, the decorative sheet S is supplied between both molds Ma and Mb, and the decorative sheet S is fixed to the mold Mb by pressing it with a sheet clamp 42 having a frame shape in plan view. At this time, it goes without saying that the second resin substrate sheet side (with respect to the first resin substrate sheet) of the decorative sheet faces the injection resin side on the right side of the drawing. Subsequently, the decorative sheet is softened by heating with a heater (not shown) inserted between both molds as appropriate. The heating is, for example, non-contact radiation heating, but may be conduction heating by contact. Then, vacuuming is performed by suction from the suction hole, and the decorative sheet is preformed along the cavity surface of the mold Mb. Next, the heater is retracted from between both molds, and both molds are clamped as shown in FIG. 2B, and a resin formed in a fluid state such as a heat-melted state is filled in a cavity formed by both molds. And after resin solidifies by cooling etc., a mold is opened and a molding is taken out. And if the unnecessary part of a decoration sheet is trimmed suitably, a decoration sheet will be laminated | stacked on a resin molding, and the decoration molded product of a structure will be obtained.

  [Injection Resin] In the injection molding simultaneous decorating method of the present invention, the resin for injection molding is basically not particularly limited and may be a known resin. It may be selected according to the required physical properties and cost of the product. Examples of the thermoplastic resin include ABS (acrylonitrile-butadiene-styrene copolymer) resin, styrene resin, acrylic resin, vinyl chloride resin, polycarbonate resin, and polyolefin resin. Further, in the case of a curable resin, it is a two-component curable resin, for example, an uncured resin solution such as a urethane resin, an unsaturated polyester resin, or an epoxy resin. The thermoplastic resin is melted by heating and injected in a fluid state, and the curable resin (its uncured product) is injected at room temperature or appropriately heated and injected in a fluid state. Note that as the injection resin, a resin colored by adding a colorant may be used as appropriate according to the application. As the colorant, a known colorant as described in the decoration layer may be used. In addition, the injection resin contains various known additives such as silica, alumina, talc, calcium carbonate, aluminum hydroxide and other inorganic powders, fillers such as glass fibers, stabilizers, lubricants, and the like as necessary. .

  Decorative molded product: The decorative molded product of the present invention is made of a resin-molded product made of at least a transparent second resin base sheet made of an acrylic resin without a matting agent and a fluororesin with a matting agent added. By laminating a surface-matte and transparent first resin base sheet in this order, the molded product has a matte design on the surface. The decorative molded product of the present invention having such a configuration can be obtained by, for example, preferably laminating the decorative sheet of the present invention on a resin molded product. Moreover, as the lamination | stacking method, the injection molding simultaneous decorating method of the above-mentioned this invention can be utilized, for example. Of course, the decorative molded product of the present invention can be made of other materials (for example, the first resin base sheet and the second resin) without using the decorative sheet of the present invention or the injection molding simultaneous decorating method of the present invention. The resin substrate sheet may be separately laminated on the resin molded product), or may be a product produced by other methods (for example, vacuum molding lamination method). However, as a matter of course, it is preferable to manufacture by the injection molding simultaneous decorating method of the present invention in that molding and decorating can be simultaneously performed in one step and production efficiency is good.

  The decorative molded product P of the present invention illustrated in the cross-sectional view of FIG. 3 exemplifies one form thereof, on the resin molded product 6, an adhesive layer 5, a decorative layer 4, a second resin base sheet. 2 and the 1st resin base material sheet 1 are the molded articles of the structure laminated | stacked in this order. Each layer on the resin molded product 6 has a configuration in which, for example, the decorative sheet S of FIG. 1 is laminated.

  The resin of the resin molded product 6 is the injection resin described in the injection molding simultaneous decorating method of the present invention, and the second resin base sheet 2 and the first resin base sheet 1 are decorated of the present invention. Since it is the base material sheet described in the sheet, further explanation is omitted here. Similarly to the decorative sheet of the present invention described above, in the decorative molded product of the present invention, as illustrated in FIG. 3, other layers such as a decorative layer and an adhesive layer are further provided as necessary. It is good also as the provided structure.

  In addition, the decorative molded product is usually a three-dimensional object in which the decorative sheet has a non-planar surface such as an uneven surface. However, the decorative molded product of the present invention does not exclude a three-dimensional object in which the laminated surface of the decorative sheet is flat but the other surface is non-planar, and a plate-like object in which the laminated surface is flat.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Example 1 A decorative sheet S having the structure shown in FIG. 1 was prepared as follows. A resin composition obtained by adding 20 parts by mass of silica particles having an average particle size of 3 μm as a matting agent a to 100 parts by mass of a transparent fluororesin made of polyvinylidene fluoride and a polymethylmethacrylate-based transparent acrylic resin are melted together. Extrusion was performed to obtain a base sheet 3 in which a first resin base sheet 1 having a thickness of 10 μm and a second resin base sheet 2 having a thickness of 90 μm were melt bonded. Next, a decorative layer 4 expressing a grain pattern is formed on the surface of the base sheet 3 on the second resin base sheet 2 side by three-color gravure printing, and further acrylic resin and vinyl chloride-vinyl acetate. A 4 μm-thick adhesive layer 5 having a 1: 1 mass ratio with the copolymer was formed on the entire surface by two-color gravure printing to obtain a decorative sheet. The ink used for forming the decorative layer was an ink mainly composed of an acrylic resin as a binder resin, and mainly composed of isoindolinone yellow, quinacridone red and carbon black as colorants. In the adhesive layer, an ink added with a colorant mainly composed of titanium white, isoindolinone yellow and quinacridone red was used for the first color, and an ink containing no colorant was used for the second color. Each color of the adhesive layer has a thickness of 2 μm.

  Then, by the injection molding simultaneous decorating method of the present invention as shown in the conceptual diagram of FIG. 2, the decorative sheet is laminated on the surface simultaneously with the molding of the resin molded product, and the configuration as shown in FIG. 3 is obtained. The decorative molded product P of the present invention was obtained. The injection molding simultaneous decorating method was carried out in a form in which a female mold for injection molding was used as a vacuum mold, and after the decorative sheet was inserted between the molds, it was softened by heating and preformed by vacuum molding. The preforming of the decorative sheet was performed by heating to a sheet temperature of 110 ° C. by infrared radiation heating, and then vacuum-sucking from the female mold side so that the decorative sheet was placed along the female cavity surface. Thereafter, a heat-resistant ABS resin (heat-resistant temperature 95 ° C.) was injected at an injection resin temperature of 240 ° C. under a mold temperature of 70 ° C., and the decorative sheet was integrated with a resin molded product to form a decorative molded product. As the injection mold, a mold for molding a vehicle interior panel having a cavity surface with a mirror finish and a width of 40 mm and a length of 400 mm was used.

  There is no wrinkling or tearing of the decorative sheet at the time of injection molding simultaneous decoration, and the appearance of the obtained decorative molded product is matte on the surface of the wood grain pattern, and whitening of the wood grain pattern that looks white is also recognized I couldn't.

[Comparative Example 1] In Example 1, 20 parts by mass of silica particles having an average particle size of 3 µm were added as a matting agent to 100 parts by mass of a polymethyl methacrylate-based transparent acrylic resin as the base sheet 3. A decorative sheet was prepared using a resin sheet having a thickness of 125 μm formed from the resin composition. However, this decorative sheet has a too strong matting effect, and the whitening of the base material sheet makes the wood grain pattern look white, and the design appearance is poor. .

[Comparative Example 2] In Example 1, 20 parts by mass of silica particles having an average particle diameter of 3 μm were added as a matting agent to 100 parts by mass of a polymethyl methacrylate-based transparent acrylic resin as the base sheet 3. A decorative sheet was prepared using a resin sheet having a thickness of 30 μm formed from the resin composition, and a decorative molded product was prepared by simultaneous injection molding. As a result, the whitening of the wood grain pattern by the base material sheet was not recognized. However, in the case of simultaneous injection molding, the decorative sheet was stretched by the resin pressure of the injection resin, which caused wrinkles.

DESCRIPTION OF SYMBOLS 1 1st resin base material sheet 2 2nd resin base material sheet 3 Base material sheet 4 Decoration layer 5 Adhesive layer 6 Resin molding 41 Suction hole 42 Sheet clamp a Matting agent Ma Injection mold (male type)
Mb injection mold (female)
P Decorative molded product S Decorative sheet

Therefore, in order to solve the above problems, the decorative sheet of the present invention is a resin in a fluid state in a cavity formed by both molds after inserting the decorative sheet between both male and female molds. In the decorative sheet for molding, in which the decorative sheet is laminated on the surface of the resin molded product simultaneously with the molding of the resin molded product, In order, a surface-matte transparent first resin substrate sheet made of a fluororesin to which a matting agent made of particles is added and a transparent second resin substrate sheet made of an acrylic resin without a matting agent are laminated. The thickness of the first resin substrate sheet is 10 μm or more and 50 μm or less, and the matting agent particles contained in the first resin substrate sheet form an uneven shape on the entire surface of the first resin substrate sheet. Forming a configuration .

Thus, the base material sheet contains a matting agent to give a matte design (first resin base material sheet), and a layer that maintains the moldability without containing the matting agent ( The second resin base sheet) and the layer containing the matting agent (first resin base sheet) have the resin as a fluororesin, so the slipperiness and durability of the resin Even with a thin film (the first resin base sheet), it is possible to prevent the matting agent from falling off and the layer itself from being worn. For this reason, the layer (second resin base sheet) that maintains moldability can be thickened to secure the main thickness of the decorative sheet here, and the resin of this layer is an acrylic resin. The moldability is maintained by its thermoplasticity. Moreover, since the transparency and easy adhesion property of the acrylic resin can be utilized, the appearance of the decorative sheet can be prevented from being whitened even if a matting agent is used. Further, since the matting is performed by adding a matting agent, the matting is not lost during molding. As a result of the above, when the decorative sheet is used to decorate the adherend by molding the sheet, the decorative sheet is not poorly formed (wrinkles and tears), the formability is reduced, and the matte feeling is not lost. A matte design can be given. In addition, since the mat is matted, the decorative sheet itself is kept transparent without whitening, and the mat can be decorated with a matte transparency. Moreover, if this decorative sheet is applied to simultaneous injection molding, the decorative sheet itself can give a matte design, so the cost of the injection mold is higher than when the matte surface is shaped with an injection mold. A matte design can be given by avoiding the rise.
Moreover, Claim 2 is the decorative sheet according to Claim 1, wherein an adhesive layer is provided on the entire surface of the second resin base sheet opposite to the surface on which the first resin base sheet is laminated. It is formed. A third aspect of the present invention is the decorative sheet according to the first or second aspect, wherein the matting agent is made of an organic polymer such as urethane resin, polycarbonate, or polyamide.

Further, the decorative molded article of the present invention, on the resin molded product, at least, were added a second resin substrate sheet made of a transparent acrylic resin matting agent not added, a matting agent consisting of particles, the surface formed by laminating the first resin substrate sheet made of a transparent fluororesin in the surface matt having a whole surface irregularities in this order, it was constructed.

Claims (3)

In the decorative sheet for molding,
In order from the surface, a transparent first resin base sheet made of a fluorine resin added with a matting agent and a transparent second resin base sheet made of an acrylic resin without adding a matting agent were laminated. A decorative sheet made of a laminate. After the decorative sheet according to claim 1 is inserted between both male and female molds with the second resin base sheet side facing the injection resin side, both molds are clamped to form both molds. Injection molding simultaneous decorating method for injecting fluidized resin into the cavity, solidifying the resin, and then opening the mold to obtain a decorated molded product in which the decorative sheet is laminated on the resin molded product surface . On the resin molding, at least a transparent second resin base sheet made of acrylic resin with no matting agent added, and a first resin base sheet transparent with a matte fluororesin added with a matting agent. A decorative molded product that is laminated in this order.

Images