Fuse molded three dimensional article and a method for making the same

Patent metadata

Field	Value
Publication number	US-10843401-B2
Application number	US-201314070053-A
Country	US
Kind code	B2
Filing date	Nov 1, 2013
Priority date	Nov 1, 2013
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A fuse molded modeling three dimensional article having areas of dissimilar or different hardness is described, wherein one of said areas is hard and is plastic, metal, glass, wood, concrete, rock, or mixtures thereof, and another of said areas is a less hard area comprising a controlled distribution hydrogenated styrenic block copolymer composition. Although the metal, glass, wood, concrete, and rock are not fuse moldable material, the plastic and the controlled distribution hydrogenated styrenic block copolymer composition are. Thus the scope of the invention is meant to include articles where only one area or layer of the article is fuse molded, or wherein both the hard area/layer and the soft area/layer is formed via a fuse molded technique.

First claim

The invention claimed is:

1. A fuse molded modeling three dimensional article having areas of dissimilar or different hardness,
wherein the areas of dissimilar or different hardness are fuse deposition molded;
wherein one of said fuse deposition molded area is hard, and another of said fuse deposition molded areas is a flexible material that is less hard;
wherein the hard area comprises a thermoplastic selected from acrylonitrile-butadiene-styrene, polylactic acid, polyamide, polyphenylsulfone, polycarbonate, polyethylene, polypropylene, polyethylene/acrylonitrile-butadiene-styrene, polycarbonate/acrylonitrile-butadiene-styrene, methylmethacrylate/acrylonitrile-butadiene-styrene, polyetherimide, and mixtures thereof;
wherein the flexible material consists essentially of a block copolymer composition, and 15 to 60 wt. % of a polyester, copolyester, polyurethane, or a mixture of two or more of these, or 15 wt. % of high impact polystyrene;
wherein said block copolymer composition comprises:
20 to 85 wt % of a controlled distribution hydrogenated styrene-ethylene butadiene-styrene block copolymer based on the total weight of the composition;
up to 30 wt % of a functionalized controlled distribution hydrogenated styrene-ethylene butadiene-styrene block copolymer having maleic anhydride grafted onto a mid block of the styrene-ethylene butadiene-styrene block copolymer; and

wherein the flexible material has
a melt flow rate of less than 28 dg/min according to ASTM D1238 at 230° C. and 2.16 kg, and
a peel strength of at least about 60N/25 mm in 180° initial adhesion test on the thermoplastic, according to JIS K6854;
wherein said thermoplastic is supplied as flexible filaments, sticks, or pellets initially in solid form to an extrusion head of a 3-D printer, where the thermoplastic is melted and deposited, forming the hard area;
wherein the flexible material has a Shore A hardness of from greater than 80 to about 95;
wherein said flexible material is not a temporary supporting material, wherein said flexible material is fuse molded on the hard area comprising the thermoplastic by deposition using the 3-D printer, and said flexible material is supplied as a flexible filament, sticks, or pellets initially in solid form to an extrusion head of the 3-D printer, and

wherein the three dimensional article is made without a mold using the 3-D printer.

2. The fuse molded modeling three dimensional article of claim 1 , wherein said controlled distribution hydrogenated styrene-ethylene butadiene-styrene block copolymer is in a range of 40 to 85 wt. %.

3. The fuse molded modeling three dimensional article of claim 1 , wherein the flexible material consist essentially of the block copolymer composition, and thermoplastic elastomer ii a copolyester.

4. The fuse molded modeling three dimensional article of claim 1 ,
wherein the flexible material consist essentially of the block copolymer composition, and a copolyester; and
wherein said thermoplastic forming said hard area is acrylonitrile-butadiene-styrene, polylactic acid, polyamide, polyphenylsulfone, polycarbonate, polyethylene, polypropylene, polyethylene/acrylonitrile-butadiene-styrene, polycarbonate/acrylonitrile-butadiene-styrene, methylmethacrylate/acrylonitrile-butadiene-styrene, or polyetherimide.

5. An additive-process method for making a three dimensional article, comprising:
providing a solid feedstock of a first plastic material to at least one extrusion head of a 3-D printer,
melting said solid feedstock of the first plastic material in said at least one extrusion head,
depositing layers of said first plastic material on to a platform to form a portion of a three dimensional article,
providing a solid second feedstock of a second plastic material to said at least one extrusion head, wherein said solid second feedstock of the second plastic material is less hard has a dissimilar hardness compared to said solid feedstock of the first plastic material,
melting said solid feedstock of the second plastic material in said at least one extrusion head, and
depositing layers of said second plastic material on to said portion of said three dimensional article comprising the first plastic material, thereby forming the three dimensional article having layers or areas of dissimilar or different hardness, wherein the first plastic material consists essentially of a thermoplastic selected from acrylonitrile-butadiene-styrene, polylactic acid, polyamide, polyphenylsulfone, polycarbonate, polyethylene, polypropylene, polyethylene/acrylonitrile-butadiene-styrene, polycarbonate/acrylonitrile-butadiene-styrene, methylmethacrylate/acrylonitrile-butadiene-styrene, polyetherimide, and mixtures thereof;
wherein the second plastic material consists essentially of:
a) a controlled distribution hydrogenated styrenic block copolymer composition comprising:
20 to 85 wt % of a controlled distribution hydrogenated styrene-ethylene butadiene-styrene block copolymer based on the total weight of the composition, and
up to 30 wt % of a functionalized controlled distribution hydrogenated styrene-ethylene butadiene-styrene block copolymer of maleic anhydride grafted onto a mid block of the styrene-ethylene butadiene-styrene, and
b) 15 to 60 wt % of a polyester, copolyester, or polyurethane, or a mixture of two or more of these, or high impact polystyrene; and wherein,
the second plastic material has a melt flow rate of less than 28 dg/min according to ASTM D1238 at 230° C. and 2.16 kg, and a peel strength of at least about 60N/25 mm in 1800 initial adhesion test on the first plastic material according to JIS K6854;
wherein the first plastic material is supplied as a-flexible filaments, sticks, or pellets initially in solid form to the at least one extrusion head of the 3-D printer;

wherein the second plastic material has a Shore A hardness of from greater than 80 to about 95;
and wherein the three dimensional article is made without a mold using the 3-D printer.

6. The additive-process method according to claim 5 , wherein said solid feedstock of the first plastic material consists essentially of methylmethacrylate/acrylonitrile-butadiene-styrene.

7. The additive-process method according to claim 5 , wherein said solid feedstock of the first plastic material consists essentially of acrylonitrile-butadiene-styrene.

8. The additive-process method according to claim 5 , wherein said solid feedstock of the first plastic material consists essentially of polycarbonate.

9. The additive-process method according to claim 5 , wherein said solid feedstock of the first plastic material consists essentially of polycarbonate/acrylonitrile-butadiene-styrene.

10. An additive-process method for making a three dimensional article, comprising
providing a portion of a three dimensional solid article comprising a thermoplastic selected from acrylonitrile-butadiene-styrene, polylactic acid, polyamide, polyphenylsulfone, polycarbonate, polyethylene, polypropylene, polyethylene/acrylonitrile-butadiene-styrene, polycarbonate/acrylonitrile-butadiene-styrene, methylmethacrylate/acrylonitrile-butadiene-styrene, polyetherimide, and mixtures thereof,
providing a solid feedstock consisting essentially of 15 to 60 wt. % of a polyester, copolyester, or polyurethane, or a mixture of two or more of these, or 15 wt. % of high impact polystyrene; and a controlled distribution hydrogenated styrenic block copolymer composition as a flexible filament, sticks, or pellets initially in solid form to at least one extrusion head of a 3-D printer, wherein the controlled distribution hydrogenated styrenic block copolymer composition comprises:
20 to 85 wt % of a controlled distribution hydrogenated styrene-ethylene but

Assignees

• Kraton Polymers Us Llc

Inventors

• Greger Marcus

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C08L75/04

  Polyurethanes · CPC title

• B29C64/106

  using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material · CPC title

• B29K2096/04

  Block polymers · CPC title

• B29C64/118 Primary

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title