Filament for three-dimensional modeling

Patent metadata

Field	Value
Publication number	US-11738502-B2
Application number	US-202016983099-A
Country	US
Kind code	B2
Filing date	Aug 3, 2020
Priority date	Feb 10, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A filament for three-dimensional modeling includes two or more kinds of resins; a fiber; and a compatibilizing agent, and has a sea-island structure including a sea part and island parts, the sea part including at least one kind of the two or more kinds of resins and the island parts including at least one kind of the two kinds of resins.

First claim

What is claimed is:

1. A filament for three-dimensional modeling,
comprising
a first resin and a second resin having a difference in solubility parameter of 5 or more;
a fiber; and
a compatibilizing agent, and

having a sea-island structure including a sea part and island parts, the sea part including the first resin and the island parts including the second resin,
wherein:
at least a part of the island part coats at least a part of a surface of the fiber,
in a cross section of the filament in a direction orthogonal to a longitudinal axis of the filament, the island parts have a diameter of 0.1 μm or more and 20 μm or less, and
S2/S1×100 is 5% or more and 49% or less, where:
S1 represents an area obtained by subtracting an area occupied by the fiber from a total area of a cross section of the filament in a direction orthogonal to a longitudinal axis of the filament, and
S2 represents a total area of the island parts in the cross section.

2. The filament for three-dimensional modeling according to claim 1 ,
wherein the S2/S1×100 is 10% or more and 40% or less.

3. The filament for three-dimensional modeling according to claim 1 ,
wherein the island parts have a diameter of 1 μm or more and 10 μm or less.

4. The filament for three-dimensional modeling according to claim 1 ,
wherein a melting temperature of the first resin included in the sea part is lower than a melting temperature of the second resin included in the island parts.

5. The filament for three-dimensional modeling according to claim 1 , wherein:
the first resin is formed of a polyolefin, and
the second resin is selected from the group consisting of a resin having at least one of an amide bond and an imide bond, a resin having an ester bond, and a resin having a bonding group including sulfur.

6. The filament for three-dimensional modeling according to claim 5 ,
wherein the compatibilizing agent is at least one kind selected from the group consisting of a polyolefin having a modified branch and a polyolefin having a modified main chain terminal.

7. The filament for three-dimensional modeling according to claim 1 ,
wherein the fiber is a continuous fiber.

8. The filament for three-dimensional modeling according to claim 1 , wherein a difference in melting temperature between the first resin in the sea part and the second resin in the island parts is 20° C. or more and 300° C. or less.

9. The filament for three-dimensional modeling according to claim 1 , wherein a difference in solubility parameter between the first resin in the sea part and the second resin in the island parts is 5 or more and 10 or less.

10. The filament for three-dimensional modeling according to claim 1 , wherein:
the first resin is formed of a polyolefin other than polypropylene and
the second resin is selected from the group consisting of a resin having at least one of an amide bond and an imide bond, a resin having an ester bond, and a resin having a bonding group including sulfur.

11. A filament for three-dimensional modeling,
comprising
a first resin and a second resin having a difference in solubility parameter of 5 or more;
a fiber selected from the group consisting of a carbon fiber, a glass fiber, a metal fiber, and an aramid fiber; and
a compatibilizing agent, and

having a sea-island structure including a sea part and island parts, the sea part including the first resin and the island parts including the second resin,
wherein:
at least a part of the island part coats at least a part of a surface of the fiber, and
S2/S1×100 is 5% or more and 49% or less, where:
S1 represents an area obtained by subtracting an area occupied by the fiber from a total area of a cross section of the filament in a direction orthogonal to a longitudinal axis of the filament, and
S2 represents a total area of the island parts in the cross section.

12. A filament for three-dimensional modeling,
comprising
a first resin and a second resin having a difference in solubility parameter of 5 or more;
a fiber; and
a compatibilizing agent, and

having a sea-island structure including a sea part and island parts, the sea part including the first resin and the island parts including the second resin,
wherein:
at least a part of the island part coats at least a part of a surface of the fiber,
the filament has a diameter of about 0.6 mm, and
S2/S1×100 is 5% or more and 49% or less, where:
S1 represents an area obtained by subtracting an area occupied by the fiber from a total area of a cross section of the filament in a direction orthogonal to a longitudinal axis of the filament, and
S2 represents a total area of the island parts in the cross section.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Nakayama Daisuke
• Yamada Taichi
• Ageishi Kentaro
• Ookoshi Masayuki
• Minabe Jiro

Classifications

• B29C64/118 Primary

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

• B29C64/205

  Means for applying layers · CPC title

• B29C64/295

  Heating elements · CPC title

• D01F6/06

  from polypropylene · CPC title

• B29K2023/12

  PP, i.e. polypropylene · CPC title