Resin material for molding and molded product

Abstract

To provide a resin material for molding excellently reducing molding shrinkage and affording a molded product having excellent thin-wall moldability, high dimensional accuracy according to design and excellent stability for thermal deformation and to provide the molded product using the material. The resin material for molding comprises a thermoplastic resin, one kind of fly ash and silica fume. The average particle diameter of the silica fume is <=1 / 10 of the average particle diameter of the one kind of fly ash and the compounding ratio of the one kind of fly ash / silica fume is (20 / 80) to (80 / 20) expressed in terms of mass ratio. The thermoplastic resin is contained in an amount of 10-40 vol.% in the resin material for molding.

Description

technical field [0001] The present invention relates to a molding resin material and a molded product, and particularly relates to a molding resin material and a molded product which can be suitably used for injection molding and which can obtain molded products with excellent dimensional accuracy. Background technique [0002] In recent years, molded products of various shapes have been required. Metals that have been used in the past are usually processed into the required shape by cutting, so compared with molded products made of resin, the operation until the molded product is obtained is more difficult. Many man-hours are required, and there are disadvantages such as poor mass productivity, so many metal parts are resinized. [0003] However, in molded products using resin, mass productivity is excellent, but shrinkage that occurs during solidification of the resin in a molten state causes deformation of the molded product, resulting in a molded product that is differen...

AI Technical Summary

Problems solved by technology

[0009] However, the material using dust as a filler is a spherical filler, so even if it is filled with fillers, the fluidity decreases slowly, and the filling rate can also be increased. However, since only one kind of dust is filled as a filler component, the filler's The range of particle size is not so large and cannot be increased to the same extent as the desired filling amount, therefore, the molding shrinkage of the obtained molded product is not particularly small, and it is difficult to obtain the required molded product with high dimensional accuracy

[0010] In this way, molding resin materials, especially molded products obtained by molding thermoplastic resin compounds, has the designed dimensions and is extremely important to meet the strict accuracy required, but molding that can obtain satisfactory high dimensional accuracy has not yet been obtained. resin material

Images