Glass-containing molding composition and process for production of the same
OwnerKenji Nakamurainventor
Life of this patent
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Abstract
A glass-containing molding composition is prepared by incorporating glass powder into a thermoplastic resin at a glass load ratio of 40 to 70 percent by weight, in which the glass powder is composed of solid spherical glass particles which have an average particle size of 10 to 40 μm and whose surfaces are totally covered with a silane compound and which exhibits reduction ratios of melt flow rate on a parabolic curve with the increase of glass load ratios and has a reduction ratio of melt flow rate of 3/4 to 1/4 within a glass load ratio in a range of 40 to 64 percent by weight.
Claims9
A pellet for glass-containing molding produced by kneading a glass powder and a thermoplastic resin and then extruding the kneaded mixture using an extruder which comprises;
- first hopper where the pellet of the thermoplastic resin is introduced and
- second hopper where the glass powder is introduced which is provided in the position where the thermoplastic resin becomes molten state, wherein
- the thermoplastic resin is selected from the group consisting of polyethylene resins, polypropylene resins, polyester resins, polystyrene resins, ABS resins, polyvinyl chloride, polyamide resins, polycarbonate resins, and polylactic acid resins;
- the glass powder is constituted by particles that are solid and have a spherical shape and an average particle diameter of 10 to 40 μm, is coated by a silane compound over their entire surface using atomization method, is incorporated in the thermoplastic resin at a glass load of 40 to 70 percent by weight;
- and
- a reduction ratio of melt flow rate of the pellet for glass-containing molding shows the value in a range of 0.75 to 0.11, wherein the reduction ratio of melt flow rate shows a value falling within the range defined by equations (1) and (2) below with an increase of the glass load:
- y=−1.3418x2−0.0803x+0.9994 (1)
- y=−1.4003x2−0.2764x+0.9985 (2)
- x:
- Glass load (0.40≦x≦0.64)
- y:
- Reduction ratio of melt flow rate.
A pellet for glass-containing molding produced by kneading a glass powder and a thermoplastic resin and then extruding the kneaded mixture using an extruder which comprises;
- first hopper where the pellet of the thermoplastic resin is introduced and
- second hopper where the glass powder is introduced which is provided in the position where the thermoplastic resin becomes molten state, wherein
- the thermoplastic resin is selected from the group consisting of polyethylene resins, polypropylene resins, polyester resins, polystyrene resins, ABS resins, polyvinyl chloride, polyamide resins, polycarbonate resins, and polylactic acid resins;
- the glass powder is constituted by particles that are solid and have a spherical shape and an average particle diameter of 10 to 40 μm, are coated by a silane compound over their entire surface using atomization method, and
- the solid spherical glass powder is incorporated in the thermoplastic resin at a glass load of 40 to 70 percent by weight and is independently dispersed in a continuous phase of the thermoplastic resin.
Dependencies are inferred from the claim text.