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摘要：
A method of additive layer manufacture for producing a cured three-dimensional polymerised object, comprises forming a feedstock comprising a polymerizable liquid resin and a bittering agent, exposing the feedstock to a curing beam according to a predetermined pattern to form a layer of cured polymer; and repeating the steps layer upon layer to form a cured three-dimensional polymerised object. The additive layer manufacture method may be electron beam curing or vat photopolymerization additive layer manufacture. The bittering agent may be selected from the group consisting of denatonium benzoate, denatonium saccharide, quinine hydrochloride, naringin, sucrose octaacetate and mixtures thereof. Methods of producing an object comprising cured polymer on, in and/or around the object, or part thereof are also provided. A feedstock comprising a polymerizable liquid resin and a bittering agent is also provided.
权利要求：
Claims
1 An additive layer manufacture method for producing a three-dimensional object, the method
comprising the steps of:
(i) forming a feedstock comprising a polymerisable liquid resin and a bittering agent;
(ii) exposing the feedstock to a curing beam according to a predetermined pattern to form
a layer of cured polymer; and
(iii) repeating step (ii) layer upon layer to form a cured three-dimensional polymerised
object.
2. A method according to claim 1, wherein the additive layer manufacture method is electron
beam curing or vat photopolymerisation additive layer manufacture.
3 A method according to claim 2, wherein additive layer manufacture method is vat
photopolymerisation additive layer manufacture and the polymerisable liquid resin is a
photocurable liquid resin.
4, A method according to claim 3, wherein the photocurable liquid resin further comprises a
photoinitiator.
5 A method according to claim 4, wherein the photoinitiator has an absorption wavelength 2
about 200 nm to < about 700 nm.
8. A method according to any one of the preceding claims, wherein the polymerisable liquid resin
comprises a mixture of multifunctional monomers and oligomers functionalized by an acrylate.
7. A method according to any one of the preceding claims, wherein the bittering agent is selected
from the group consisting of denatonium benzoate, denatonium saccharide, quinine
hydrochloride, naringin, sucrose octaacetate and mixtures thereof.
8. A method according to claim 7, wherein the bittering agent is denatonium benzoate.
9. A method according to any one of the preceding claims, wherein the concentration of bittering
agent in the feedstock is from about 100 ppm to about 10,000 ppm, such as about 100 ppm
to about 5000 ppm.
10. A method according to claim 9, wherein the concentration of bittering agent in the feedstock
is from 2 about 500 ppm to < 1100 ppm.
11. A method according to any one of the preceding claims, wherein the curing beam is
electromagnetic radiation has a wavelength 2 about 200 nm to < about 700 nm.
12. A method according to claim 11, wherein the electromagnetic radiation has a wavelength of
about 365nm, about 405 nm, or about 460 nm.
13. A method according to any preceding claims, wherein the exposure time for the curing beam
is about 1 second to about 60 seconds.
14. An additive layer manufacture method for producing an object comprising cured polymer on,
in and/or around the object, or part thereof, the method comprising the steps of:
(i) forming a feedstock comprising a polymerisable liquid resin and a bittering agent;
(i) immersing an object, or part thereof, into the feedstock;
(iii) exposing the feedstock to a curing beam according to a predetermined pattern to form
a layer of cured polymer on, in and/or around the object, or part thereof; and
(iv) optionally repeating step (iii) layer upon layer to form an object comprising cured
polymer on, in and/or around the object, or part thereof.
15; An additive layer manufacture method for producing an object comprising cured polymer on,
in and/or around the object, or part thereof, the method comprising the steps of.
(i) forming a feedstock comprising a polymerisable liquid resin and a bittering agent;
(ii) depositing the feedstock onto, in and/or around an object, or part thereof according to
a predetermined pattern;
(iii) exposing the feedstock to a curing beam to form a layer of cured polymer on, in and/or
around the object, or part thereof; and
(iv) optionally repeating step (iii) layer upon layer to form an object comprising cured
polymer on, in and/or around the object, or part thereof.
16. A method according to claim 14 or claim 15 comprising the features of any one of claims 2 to
13.
17. A cured 3D polymerised object produced according to the method according to any one of
claims 1 to 13, wherein the cured 3D polymerised object comprises a bittering agent
distributed within the cured polymer.
18. A cured 3D polymerised object, wherein the object comprises a cured polymer and a bittering
agent, the object comprising multiple layers of individually cured polymer, and the bittering
agent is distributed within the individually cured polymer layers.
19. A cured 3D polymerised object according to claim 17 or claim 18, wherein the bittering agent
is distributed substantially homogeneously within the individually cured polymer layers. 20. A cured 3D polymerised object according to any one of claims 17 to 19, wherein the object is
a shell for an in-ear hearing aid.
24%: An object, or part thereof, comprising multiple layers of individually cured polymer on, in and/or
around the object, or part thereof, wherein a bittering agent is distributed within the individually
cured polymer layers.
22. An object according to claim 21, wherein the bittering agent is distributed substantially
homogeneously within the individually cured polymer layers.
23. A feedstock comprising a polymerisable liquid resin and a bittering agent.
24. A feedstock according to claim 23 comprising the features of any one of claims 4 to 10.