JPS6029745B2 - plastic molding materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic molding material comprising an unsaturated polyester resin as a main ingredient, mixed with a transparent inorganic filler and a metal foil for pattern appearance. The purpose is to provide a plastic molding material in which the molded product has a transparent feel and the metal foil for pattern appearance is layered and raised.

In conventional compounds such as so-called sheet molding compounds, the filler is opaque calcium carbonate, and molded products using this material lack transparency in the surface layer.

Therefore, when conventional sheet molding compounds are mixed with metal foil such as aluminum foil or colored fibers, even molded products using these materials have the disadvantage that the surface has little depth of design and is not effectively expressed. there were. The present invention was invented in view of the above points, and will be described in detail below.

In the present invention, the amount of calcium carbonate used as a filler in conventional sheet molding compounds has been reduced from 100 to 15 anchors to about half, by 50 to 8 anchors, and glass beads or Add 20 to 5 anchors of other transparent inorganic filler, mix thoroughly with polyester resin, low shrinkage agent, template agent, coloring agent, hardening agent, and solvent, and add to this to create patterns on aluminum foil, etc. The sheet molding compound is obtained by impregnating the metal foil with glass fiber as a reinforcing agent and winding it up. Regarding the materials used in the present invention, unsaturated polyester resin is used as the main resin, thermoplastic resin is used as the low shrinkage agent, zinc stearate is used as the template agent, and as the coloring agent. Toners, pigments, etc. are used as fillers, opaque fillers such as calcium carbonate and clay, and inorganic fillers such as glass beads are used as hardeners, and tertiary butyl perxibenzoate etc. are used as hardeners. Magnesium oxide, alkali metals, and hydroxides are used as thickeners, styrene is used as a crosslinking monomer, and aluminum foil, silver foil, etc. are used as metal boxes for creating patterns. , glass fiber is used as a reinforcing agent. The plastic molding material of the present invention has unsaturated polyester as its main ingredient, and a transparent inorganic filler and metal foil for pattern appearance are mixed therein, so molded products can be formed using the plastic material of the present invention. Then, the transparent inorganic filler creates a sense of transparency, and the metal foil used to create the pattern appears layered and lifted.
This has the advantage that a deep pattern appears.

Next, the present invention will be specifically explained using examples.

[Example] Unsaturated polyester resin (N-25 manufactured by Nippon Shokubai Chemical Co., Ltd.) 85 parts Low shrinkage agent (manufactured by Nippon Shokubai Chemical Co., Ltd.) 15 parts Template agent (zinc stearate manufactured by Nippon Oil & Fats Co., Ltd.) 2 parts Colorant (manufactured by Nippon Shokubai Chemical Co., Ltd.) 5 parts metal foil (manufactured by Fukuda Metal Foil & Powder Co., Ltd.) 1 part opaque filler (calcium carbonate manufactured by Nitto Funka) 70 parts transparent filler (glass beads manufactured by Nippon Glass Fiber)
30 parts hardening agent (Barbutyl Z manufactured by Nihon Yushi) 1 part styrene (manufactured by Showa Denko) 1 part thickening agent (manufactured by Showa Denko)
1 part glass roping (Mg○ manufactured by Wakimag) (24 Misaki A54 $J manufactured by Nitto Paper) agent, colorant,
After adding the opaque filler, transparent filler, and hardening agent and coagulating for 20 minutes, add the hardening agent and thickener and let it thicken for 2 minutes. The glass roving was cut into one piece and wound up.

The rolled material was thickened at 40 qo for 24 to 4 hours to obtain the above molding material. Using the upper molding material, use the washing machine waterproof floor FRP molding mold, and make the surface side mold 1.
45:00: Raise the temperature of the back side mold to 135q0, put 7k9 of the above molding material between the molds, and set the final cut-off speed to 2cm/cm.
Pressure was applied at two sides, and the pressure was maintained at a pressure of 69.4 [9/] for the projected area for 5 minutes, and then the mold was opened and the molded product was taken out.

The resulting molded product was more transparent than conventional FRP molded products, and had a pattern in which metal foil powder with metallic luster overlapped in layers and stood out in a blue background.

The appearance of the metal foil for pattern appearance when the filler composition is changed is shown below.

The method is the same as in Example 1, and the formulations are the same except for the colorant, metal foil, and filler. Colorant metal foil filler
Condition (1) 5 parts 1 part 70 parts A little metal foil appears (2) 5 parts 1 part 50 parts A little more transparent than (1) (3) 5 parts 1 part 30 parts Fairly transparent Yes, metal foil powder appears {4} 5 parts 1 part 10 parts Good condition Therefore, when adding an appropriate amount of colorant and changing the filler, transparency and metal foil often appearing are due to the filler. This is the case when the amount is less than around 3 anchors.

Also, if the amount of colorant is reduced, the roving glass of the reinforcing material will be clearly visible and the appearance will not be good.

Claims (1)

[Claims] 1. A plastic molding material comprising an unsaturated polyester resin as a main ingredient, mixed with a transparent inorganic filler and a metal foil for pattern appearance.