Resin composition, and three-dimensional moulding production method

Patent metadata

Field	Value
Publication number	US-2019330483-A1
Application number	US-201716474919-A
Country	US
Kind code	A1
Filing date	Dec 5, 2017
Priority date	Jan 12, 2017
Publication date	Oct 31, 2019
Grant date	—

Abstract

The purpose of the present invention is to provide a nanofibre-containing liquid resin composition which is used in a three-dimensional moulding production method in which a moulding obtained by curing the resin composition by irradiating the resin composition with active energy rays is three-dimensionally formed, said resin composition being capable of further reducing the difference between the strength of the formed three-dimensional moulding in the height direction and the strength thereof in a planar direction. The present invention relates to a liquid resin composition which is used to produce a three-dimensional moulding, and which three-dimensionally forms a moulding as a result of being cured by being selectively irradiated with active energy rays. The resin composition includes an active energy ray-curable compound and nanofibres. The ratio of the number of nanofibres having a branched structure to the total number of nanofibres is 5% or higher.

First claim

1 . A resin composition to be used in production of a three-dimensional shaped article, the production including selectively irradiating a liquid resin composition with an active energy ray, thereby three-dimensionally forming a shaped article having the resin composition cured, wherein
the resin composition comprises an active energy ray-curable compound and a nanofiber, and includes a branch-structured nanofiber at a percentage of 5% or more on a number basis relative to a total of the nanofiber.

2 . The resin composition according to claim 1 , wherein the resin composition includes the branch-structured nanofiber at a percentage of 20% or more on a number basis relative to the total of the nanofiber.

3 . The resin composition according to claim 1 , wherein the nanofiber has an average fiber size of 2 nm or more and 100 nm or less.

4 . The resin composition according to claim 1 , wherein the nanofiber has an average fiber length of 0.2 μm or more and 100 μm or less.

5 . The resin composition according to claim 1 , wherein the nanofiber has an aspect ratio of 10 or more and 10,000 or less.

6 . The resin composition according to claim 1 , wherein a percentage of a mass of the nanofiber based on a total mass of the active energy ray-curable compound is 0.05 mass % or more and 90 mass % or less.

7 . The resin composition according to claim 1 , wherein the nanofiber comprises nanocellulose as a main component.

8 . The resin composition according to claim 7 , wherein the nanocellulose comprises a cellulose nanofiber.

9 . The resin composition according to claim 7 , wherein the nanocellulose comprises a cellulose nanocrystal.

10 . A production method for a three-dimensional shaped article, the method comprising selectively irradiating the resin composition according to claim 1 with an active energy ray, thereby three-dimensionally forming a shaped article having the resin composition cured.

11 . The production method according to claim 10 , the method comprising:
selectively irradiating the resin composition with an active energy ray, thereby forming a first shaped article layer, in a shaping tank, feeding the resin composition onto a surface of the first shaped article layer, selectively irradiating the resin composition fed, with an active energy ray, thereby forming a second shaped article layer having the fed resin composition cured, and depositing the second shaped article layer on the first shaped article layer, and repeating feeding of the resin composition and deposition of the shaped article layer, thereby three-dimensionally forming a shaped article having the resin cured.

12 . The production method according to claim 10 , the method comprising
allowing an active energy ray to pass through a buffer region in which curing of the resin composition is inhibited by a polymerization inhibitor, and selectively irradiating a curing region which has a lower concentration of the polymerization inhibitor and in which the resin composition is curable, with the active energy ray, thereby curing the resin composition contained in the curing region, in a shaping tank, and continuously irradiating the resin composition cured, with the active energy ray, with the resin composition cured being transferred in a vertical direction in the shaping tank, thereby three-dimensionally and continuously forming a shaped article having the resin composition cured.

13 . The production method according to claim 12 , wherein the curing region is irradiated with the active energy ray from a direction of a bottom surface of the shaping tank.

Assignees

• Konica Minolta Inc

Inventors

• Kojima Takeshi

Classifications

• C09D11/14

  based on carbohydrates · CPC title

• C09D11/08

  based on natural resins · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• C08F2/44

  Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers · CPC title