Color pigment master batch and blow molding method using the same
AssigneesIdemitsu Petrochemical Co., Ltd., Tokyo Printing Ink Mfg. Co., Ltd.
InventorsMasami Takimoto, Toshihisa Miyaoka, Takeshi Watanabe
Life of this patent
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Abstract
A color pigment master batch having a high recycling property and a process for producing a blow-molded article having a grain-tone appearance using this color pigment master batch. The color pigment master batch for blow molding includes a pigment and a carrier resin. The carrier resin is a thermoplastic elastomer which is a crystalline or amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of a molding base resin and a crystal melting point or a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR ratio thereof to the molding base resin is 5 or more.
Claims8
A color pigment master batch to be mixed with a molding base resin including a thermoplastic resin for blow molding, comprising a pigment and a carrier resin, wherein the carrier resin is a thermoplastic elastomer which is a crystalline thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a crystal melting point higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more.
A color pigment master batch to be mixed with a molding base resin including a thermoplastic resin for blow molding, comprising a pigment and a carrier resin, wherein the carrier resin is a thermoplastic elastomer which is an amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more.
A blow molding method comprising:
- controlling a temperature of a molding material including a molding base resin and a color pigment master batch at a tip part of a plasticization extruding device in a blow molding machine, the color pigment master batch including a pigment and a carrier resin, the carrier resin comprising a thermoplastic elastomer which is a crystalline thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a crystal melting point higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more;
- delivering the molding material controlled in a temperature to an extruding head to heat the molding material to a higher temperature than a crystal melting point of the thermoplastic elastomer contained in the color pigment master batch;
- and
- extruding the molding material from the extruding head to produce a blow-molded article having a grain tone appearance.
A blow molding method comprising:
- controlling a temperature of a molding material including a molding base resin and a color pigment master batch at a tip part of a plasticization extruding device in a blow molding machine, the color pigment master batch including a pigment and a carrier resin, the carrier resin comprising a thermoplastic elastomer which is an amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more;
- delivering the molding material controlled in a temperature to an extruding head to heat the molding material to a higher temperature than a flow-starting temperature of the thermoplastic elastomer contained in the color pigment master batch;
- and
- extruding the molding material from the extruding head to produce a blow-molded article having a grain tone appearance.
A blow-molded article having a grain-tone appearance prepared by blow-molding a molding material, comprising:
- a molding base resin including a thermoplastic resin;
- a base color pigment master batch in an amount of 1 to 10% by weight based on the molding material and including a base color pigment and a carrier resin having a melting temperature which is not higher than a melting temperature of the molding base resin;
- and
- a color pigment master batch in an amount of 0.1 to 5% by weight based on the molding material and including a pigment and a carrier resin,
- wherein the carrier resin of the color pigment master batch comprises a thermoplastic elastomer which is a crystalline thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a crystal melting point higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more.
A blow molding method comprising:
- adding a recycled material prepared by crushing or pelletizing molding burrs obtained in producing a blow-molded article in a prescribed amount, the blow-molded article having a grain-tone appearance prepared by blow-molding a molding material and comprising a molding base resin, a base color pigment master batch, and a color pigment master batch, the molding base resin including a thermoplastic resin, the base color pigment master batch in an amount of 1 to 10% by weight based on the molding material and including a base color pigment and a carrier resin having a melting temperature which is not higher than a melting temperature of the molding base resin, the color pigment master batch in an amount of 0.1 to 5% by weight based on the molding material and including a pigment and a carrier resin, the carrier resin of the color pigment master batch comprising a thermoplastic elastomer which is a crystalline thermoplastic elastomer having a Vicat softening point higher than a melting temperature of a molding base resin and a crystal melting point higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more;
- and
- supplementing a grain-tone pigment at an initial stage of molding cycles, where the recycled material is not added, the grain-tone pigment having a concentration obtained by deducting an addition percentage of the grain-tone pigment added in each of the molding cycles from a concentration of the residual grain-tone pigment contained in a molded article which finally converges into a fixed value by adding a prescribed amount of the grain-tone pigment in each of the molding cycles.
A blow-molded article having a grain-tone appearance prepared by blow-molding a molding material, comprising:
- a molding base resin including a thermoplastic resin;
- a base color pigment master batch in an amount of 1 to 10% by weight based on the molding material and including a base color pigment and a carrier resin having a melting temperature which is not higher than a melting temperature of the molding base resin;
- and
- a color pigment master batch in an amount of 0.1 to 5% by weight based on the molding material and including a pigment and a carrier resin,
- wherein the carrier resin comprises a thermoplastic elastomer which is an amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of the molding base resin and a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more.
A blow molding method comprising:
- adding a recycled material prepared by crushing or pelletizing molding burrs obtained in producing a blow-molded article in a prescribed amount, the blow-molded article comprising a molding base resin, a base color pigment master batch, and a color pigment master batch, the molding base resin including a thermoplastic resin, the base color pigment master batch in an amount of 1 to 10% by weight based on the molding material and including a base color pigment and a carrier resin having a melting temperature which is not higher than a melting temperature of the molding base resin, the color pigment master batch in an amount of 0.1 to 5% by weight based on the molding material and including a pigment and a carrier resin, the carrier resin of the color pigment master batch comprising a thermoplastic elastomer which is an amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of a molding base resin and a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR (melt flow rate) ratio (MFR of the thermoplastic elastomer/MFR of the molding base resin) to the molding base resin is 5 or more;
- and
- supplementing a grain-tone pigment at an initial stage of molding cycles, where the recycled material is not added, the grain-tone pigment having a concentration obtained by deducting an addition percentage of the grain-tone pigment added in each of the molding cycles from a concentration of the residual grain-tone pigment contained in a molded article which finally converges into a fixed value by adding a prescribed amount of the grain-tone pigment in each of the molding cycles.
Dependencies are inferred from the claim text.