Filament for 3D printing and method for producing crystalline soft resin molded article
View Patent ↗The present invention provides a filament for three-dimensional printer molding which includes a resin that can be molded by a three-dimensional printer in a wide temperature range and from which a crystalline soft resin molded article excellent in terms of flexible texture etc. can be produced; and a method for producing a crystalline soft resin molded article, wherein the filament for three-dimensional printer molding includes a polyester-based thermoplastic elastomer wherein a durometer D hardness (JIS K6253-1993) is 40 or less and thermal properties measured with a differential scanning calorimeter satisfy the following conditions: a melting peak temperature (A) is 120 to 220° C. by heating at 10° C./min; a crystallization peak temperature (B) is 60 to 160° C. by cooling at 10° C./min; and the crystallization peak observed during cooling at 10° C./min has a half-value temperature width of 10 to 30° C.
1. A filament for three-dimensional printer molding which comprises a polyester-based thermoplastic elastomer wherein a durometer D hardness (JIS K6253-1993) is 40 or less and thermal properties measured with a differential scanning calorimeter (DSC) satisfy the following conditions:
a melting peak temperature (A) is 120 to 220° C. by heating at 10° C./min;
a crystallization peak temperature (B) is 60 to 160° C. by cooling at 10° C./min; and
the crystallization peak observed during cooling at 10° C./min has a half-value temperature width of 10 to 30° C.;
wherein the polyester-based thermoplastic elastomer is a polybutylene terephthalate-polyalkylene glycol block copolymer.
2. The filament for three-dimensional printer according to claim 1 , wherein the thermal properties of the polyester-based thermoplastic elastomer which are measured with a differential scanning calorimeter (DSC) further satisfy the following:
the difference between the melting peak temperature (A) and the crystallization peak temperature (B) is 40 to 80° C.
3. The filament for three-dimensional printer according to claim 1 , which has a filament diameter of 1.0 to 5.0 mm.
4. A roll body of the filament for three-dimensional printer according to claim 1 .
5. A cartridge to be mounted in or on a three-dimensional printer, which contains the roll body according to claim 4 therein.
6. A method for producing a crystalline soft resin molded article,
wherein the filament of claim 1 is used as raw material and
the raw material is molded with a three-dimensional printer.
7. The method for producing a crystalline soft resin molded article according to claim 6 , wherein the thermal properties of the polyester-based thermoplastic elastomer which are measured with a differential scanning calorimeter (DSC) further satisfy the following condition:
the difference between the melting peak temperature (A) and the crystallization peak temperature (B) is 40 to 80° C.
8. The method for producing a crystalline soft resin molded article according to claim 6 , wherein a temperature of a molten resin which is extruded from an extrusion head of the three-dimensional printer is 180 to 250° C.
9. The method for producing a crystalline soft resin molded article according to claim 6 , wherein the molding with the three-dimensional printer is based on a fused deposition modeling method.
10. The method for producing a crystalline soft resin molded article according to claim 6 , wherein the molding with the three-dimensional printer is conducted by extruding a molten resin from the extrusion head into a strand shape having a diameter of 0.01 to 1 mm.