JP3073572B2 - Laminated plastic modeling plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

This invention relates to laminated plastic modeling plates. For more information,
The present invention relates to a plastic modeling plate based on a low-temperature thermoplastic plastic which can be freely molded by heating and softening at a relatively low temperature safe for a human body, for example, hot water at about 60 to 80 ° C.

[0002]

2. Description of the Related Art Conventionally, as a plastic modeling plate for molding based on a low-temperature thermoplastic, a laminating plate-like modeling plate in which a metal component is vacuum-deposited on the surface of a low-temperature thermoplastic plastic plate. -Is commercially available.

[0003]

However, a conventional modeling plate such as a laminate plate in which a metal component is only vacuum-deposited on the surface has the following problems.

That is, when such a modeling plate is heated and softened with hot water or the like to perform a molding operation, the deformation (especially elongation) does not cause much problem if the degree of deformation is small. In the case of molding with a large degree, ie, so-called “deep drawing”, there is a problem that the metal vapor deposition layer cannot follow the elongation of the plastic and cracks or the metal vapor deposition layer comes off the plastic. Was.

[0005] Further, the surface of the metal vapor-deposited layer is insufficient in gloss, and the choice of colors is narrow. Therefore, when aesthetic appearance is required, it is not possible to sufficiently respond to the needs of consumers.

[0006]

The object of the present invention is to crack the thin metal layer,
So that it does not come off the plastic, and
An object of the present invention is to provide a modeling plate that has a wide range of color choices and can impart gloss to the surface.

[0007]

That is, the present invention provides "(a) an affixed film or a coated film, (b) a metal thin film or a metal deposited film, and (c) a colorless or colored low-temperature thermoplastic. A plastic plate which can be processed at a low temperature, characterized in that it is laminated, if necessary, in the order of (d) the adhesive layer between (b) and (c).

Hereinafter, the laminated plastic modeling plate of the present invention will be described in detail.

The laminated plastic modeling plate of the present invention comprises: (a) an affixed or coated film; (b) a thin metal film or a metallized film; and (c) a plastic comprising a colorless or colored low-temperature thermoplastic. It is characterized in that it is laminated in the order of plates and can be processed at low temperature.

First, (a) an attached film or a coated film, which is one of the components, will be described.

[0011] The material of the film is not particularly limited. Vinyl chloride, vinylidene chloride, polyester, polyamide,
Polypropylene, polyethylene, polyurethane films and the like can be used. Of these, polyamide, vinyl chloride, and polyurethane films are preferred from the viewpoint of adhesion to a metal surface, elongation, and the like. The film must be transparent in view of the characteristics required for the product of the present invention. This is because, in the case of opacity, the surface of the metal thin film or the metal vapor deposition film (b) described below becomes invisible, so that there is no point in using it.

If the film is transparent, the film may be colored or colorless. When a colorless and transparent film is used, the color of the metal film located thereunder becomes the appearance color as it is. For example, silver is used when aluminum is used, and gold when brass is used. In addition, if a desired color such as red, blue, or yellow is used while maintaining the transparency of the film, various colors can be given to a single kind of metal thin film. For example, if aluminum is used as a metal thin film or metal deposited film material and the film is pink to red, the appearance is copper color to metallic red, if the film is yellow, the appearance is gold, if the film is blue, The appearance is metallic bull. Furthermore, various appearances can be obtained by performing various processings on the film surface, for example, pattern printing, hairline processing and the like.

The thickness of the film is on the order of 10 to 500 microns, preferably 50 to 300 microns. As a method for forming a film, a method in which a dope in which the above-described material is dissolved in an organic solvent may be applied, or a method in which a ready-made film is attached may be used.

Next, (b) a metal thin film or a metal deposition film will be described. Of course, noble metals can be used, but aluminum, tin, brass and the like are preferable in terms of cost. The choice of a metal thin film or a vapor-deposited film depends on the characteristics of the metal used, the required surface state, and the like. For example, when a matte surface is required, it is better to deposit metal. When the gloss of the surface is required, the method of depositing a metal is not preferable. When mass productivity is required, the method of vapor deposition is not preferable. In both cases where the metal is attached in the form of a thin film and when the metal is deposited, the following (c) a plastic preform made of a colorless or colored low-temperature thermoplastic plastic is used.
An adhesive layer (for example, a hot melt resin) may be interposed between (b) and (c) in order to ensure adhesion to the resin.

[0015] The thickness of the metal thin film is about 10 to 500 microns, preferably 50 to 300 microns.
When an adhesive layer made of a hot melt resin is interposed between (b) and (c), the adhesion can be strengthened by hot stamping.

An example of a specific production method is shown below.

Products (for example, hot stamping foils) on which a film, a metal film, and an adhesive layer are formed in advance on a backing paper are sequentially laminated, and then adhered to a base sheet by a hot-pressure transfer method.

Incidentally, not only those laminated in the order of (a), (b), (c) and (d), but also
(A), (b), (c), (b), (a) and (d)
, That is, symmetrically laminated with respect to (c).

Next, (c) a plastic plate made of a colorless or colored low-temperature thermoplastic will be described. Low-temperature thermoplastics are resins that are different from resins having relatively low softening temperatures, such as polyethylene and polypropylene, which have been conventionally used for various applications. Incidentally, the above-mentioned polyethylene, polypropylene and the like have a relatively low softening temperature among thermoplastic resins, but still have a softening temperature of about 200 ° C.

One of the specific low-temperature thermoplastics is polycaprolactone. A typical example of polycaprolactone resin is H series (number average molecular weight) of polycaprolactone resin from Daicel Chemical Industries, Ltd.
What is marketed as 1000-100000) may be used. Among the above H series of polycaprolactone resins, those having a number average molecular weight of 50,000 to 80,000 are particularly preferred.

The resin having a number average molecular weight in the above-mentioned range suitable as a grade of the resin for a laminated modeling plate of the present invention has a relative viscosity of 1.15 to 2.28. This is obtained by polymerizing the water slightly contained in the caprolactone monomer as an initiator. Such resins are conventionally used for known applications. For example, a boosting operation object (JP-A-60-240)
692), plastic clay (JP-A-61-4267)
9), medical casts (JP-A-58-81042), splint materials, face masks for radiation irradiation, and wig molding (JP-A-60-215018). The relative viscosity described in the present invention is a value measured using a capillary viscometer (Ubbelohde viscometer). The measurement method is JIS K
Performed according to 6726. However, the value is measured at a toluene concentration of 1% as a solvent and at a temperature of 27 ° C. ± 0.05 ° C.

Other plastics materials suitable as low temperature thermoplastics in the laminated modeling plates of the present invention include butadiene polymers having a high trans content. This is accomplished by converting a butadiene monomer into a homogeneous composite catalyst comprising a barium, strontium, or calcium compound and an organolithium compound and / or an organomagnesium compound, and optionally an organoaluminum compound; Can be easily obtained by performing solution polymerization in a hydrocarbon solvent in the presence of a homogeneous composite catalyst comprising an organometallic compound.

Another example of a plastics material used as a low temperature thermoplastic in the laminated modeling plate of the present invention is a trans isoprene polymer. For example, Kuraray TP-301 manufactured by Kuraray Isoprene Chemical Co., Ltd. is typical. Transoctenamer is also one of the materials that can be used as a low temperature thermoplastic in the laminated modeling plates of the present invention.

Specific examples of the trans-octenamer include Vestenamer-8012 and Vestenamer-A9 manufactured by Huls, West Germany.

Softening at a relatively low temperature as described above,
The resin which becomes solid at room temperature is not limited to a single resin, and plural kinds of resins may be blended and used.

Rather, it is more convenient to use a blend since the softening temperature can be appropriately adjusted and the advantages of each resin can be provided.

The low-temperature thermoplastic resin refers to a plasticizer, a stabilizer, a heat transfer material, a coloring agent added as required, or a property not possessed by the above-described resin alone in the resin material. This shall include the case where another resin is blended for application.

The resin may have its own inherent color, but may be colored.

As a matter of course, "(a),
(B), (c), (b), (a) and (d), which are laminated in the order, i.e., symmetrically laminated with respect to (c). In such a case, the resin is covered with the metal thin film or the vapor-deposited film, so it is meaningless if the resin is colored.

In the resin, an inorganic matting agent such as titanium white, calcium carbonate, and silica may be added alone or simultaneously with a coloring agent.

The resin used may be a resin to which a coloring agent is added, and the amount of the coloring agent used is 1 to 5% based on the resin.
In addition, a heat transfer material may be used to facilitate softening.
The reason for using the heat transfer material is to ensure that the material is heated uniformly when heated.

A preferred heat transfer material is a metal powder having a high thermal conductivity, such as an aluminum powder or a copper powder. The amount of heat transfer material used may be about the same as the amount of dye or pigment used. Next, a mold used for processing the plastic modeling plate of the present application will be described.

The mold referred to in the present invention is not a precise mold such as a mold used for molding a plastic molded product or the like using a molding machine, but can be called a "simple mold". As a material for producing the mold, the resin heated to about 60 to 100 ° C. for a relatively short period of time, but has a certain degree of heat resistance because it is heated partially or entirely upon contact. It is necessary to do.

Further, it must have good workability itself, it is inexpensive, and it adheres to a softened low-temperature thermoplastic which is a main constituent material of the modeling plate. The selection should be made in consideration of the fact that it is necessary not to do so. The size of the mold is not particularly limited.

There is almost no problem if the material is selected from plastic materials generally used for general purposes, but polyethylene and polypropylene are particularly suitable.

The mold may be used in a combination of a female mold and a male mold, or a system using only one of them.

When used in combination with a female mold and a male mold, the shape of the molded product is more uniform.

The situation in which a model is actually produced using the laminated plastic modeling plate of the present invention is as follows.

First, the plastic modeling plate is taken out of the packaging material, immersed in warm water of 60 ° C. or more, and left for 10 to 20 seconds. Check that the resin has softened,
Take it out of the warm water and press the laminating surface against the mold to form the desired shape.

In the case of using a female or male mold alone, the tool is pressed against the mold using a tool such as a hand or a spatula. When a female mold and a male mold are used in combination, a softened resin is placed on one of the female mold and the male mold and molded using either the male mold or the female mold. At this time, a molding method called "vacuum forming" can be applied.

After confirming that the plastic modeling plate heated and softened has cooled and hardened, the plastic modeling plate can be detached from the mold to produce an object.

If there are burrs on the molded product, they are cut off with scissors or a knife and finished. The temperature of the hot water for softening the resin is 60 to 100 ° C., preferably 6 to 100 ° C.
0-80 ° C.

[0043]

The laminated plastic modeling plate of the present invention does not crack the metal thin layer and does not peel off from the plastic. In addition, it is possible to impart gloss to the surface. Further, a resin part having a three-dimensional appearance can be easily manufactured without special techniques or tools.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B32B 15/08 C08L 23/00 C08L 45/00 C08L 67/04

Claims (5)

(57) [Claims] (1) Attached or coated film (b) Metal thin film or metal deposited film (c) Plastic plate made of colorless or colored low-temperature thermoplastic plastics If necessary (d) A laminated plastic modeling plate that can be processed at low temperature, characterized in that it is laminated in the order of the adhesive layer between (b) and (c). 2. A laminated low temperature processable plastic modeling plate according to claim 1, wherein the low temperature thermoplastic is polycaprolactone. 3. The laminated low temperature processable plastic modeling plate of claim 1, wherein the low temperature thermoplastic is trans polyisoprene. 4. The laminated low temperature processable plastic modeling plate of claim 1, wherein the low temperature thermoplastic is transpolyoctenamer. 5. The laminated low temperature processable plastic modeling plate of claim 1, wherein the low temperature thermoplastic is trans polybutadiene.