发明人：
VAN BOMMEL, TIES | HIKMET, RIFAT, ATA, MUSTAFA | VAN OS, JACOBUS, PETRUS, JOHANNES
摘要：
The invention provides a method for producing a 3D item (1) by means of fused deposition modelling, the method comprising a 3D printing stage, wherein the 3D printing stage comprises a reflective material deposition stage, wherein the reflective material deposition stage comprises: (A) providing 3D printable material (201) comprising (i) a polymeric matrix material (211) that is transmissive for UV radiation, especially wherein the polymeric matrix material (211) comprises thermoplastic material, and (ii) a reflective material (212) that is reflective for the UV radiation and that is at least partly enclosed by the polymeric matrix material (211); wherein the reflective material (212) comprises a first fluoropolymer; and (B) depositing the 3D printable material (201), to provide the 3D item (1) comprising 3D printed material (202) comprising the matrix material (211) and the reflective material (212).
权利要求：
38
CLAIMS:
1. A method for producing a 3D item (1) by means of fused deposition modelling, the method comprising a 3D printing stage, wherein the 3D printing stage comprises a reflective material deposition stage, wherein the reflective material deposition stage comprises: providing 3D printable material (201) comprising (i) a polymeric matrix material (211) that is transmissive for UV radiation, wherein the polymeric matrix material (211) comprises thermoplastic material, and (ii) a reflective material (212) that is reflective for the UV radiation and that is at least partly enclosed by the polymeric matrix material (211); wherein the reflective material (212) comprises a first fluoropolymer, wherein the first fluoropolymer comprises a first microporous polytetrafluoroethylene; and depositing the 3D printable material (201), to provide the 3D item (1) comprising 3D printed material (202) comprising the matrix material (211) and the reflective material (212).
2. The method according to claim 1, wherein the first fluoropolymer comprises a microporous fluoropolymer, having a porosity selected from the range about 35-45%,
3. The method according to any one of the preceding claims, wherein the first fluoropolymer comprises a first amorphous fluoropolymer.
4. The method according to any one of the preceding claims, wherein the first fluoropolymer comprises a first fluoropolymer melting temperature Tfi,m, wherein the matrix material (211) comprises a second fluoropolymer having a second fluoropolymer melting temperature Tn.m and/or a second fluoropolymer glass transition temperature Te,g, wherein Tf? m<Tfi m-10°C and/or wherein Tf2;g<rfi;m-10oC.
5. The method according to any one of the preceding claims 1-4, wherein the reflective material deposition stage comprises (a) guiding a fiber (240) without melting
39 through a 3D printer nozzle (502), while also (b) providing the polymeric matrix material (211) to the 3D printer nozzle (502) to provide core-shell 3D printed material (202).
6. The method according to any one of the preceding claims 1-4, wherein the 3D printable material (201) comprises particulate material (250) comprising the reflective material (212), wherein the particulate material (250) is embedded in the matrix material (211).
7. The method according to claim 6, wherein the particulate material (250) comprises a second reflective material (250) selected from the group of BaSCh particles, TiCh particles, AI2O3 particles, silver particles, aluminum particles, and reflective flakes.
8. The method according to any one of the preceding claims 5-7, comprising depositing 3D printable material (201) comprising a core (260) and a shell (270), wherein the core (260) comprises the reflective material (212), wherein the core (260) comprises thermoplastic material, and wherein the shell (270) comprises the matrix material (211); wherein a layer (322) of the 3D printed material (202) has a width (wl) and a height (hl), individually selected from the range of 0.1-10 mm; wherein the shell (270) has a largest shell width (wsmi), wherein the largest shell width (wsmi) is selected from the range of 2-15% of the width (wl).
9. The method according to any one of the preceding claims, wherein the 3D item (1) comprises a hollow reflector.
10. A 3D item (1) comprising 3D printed material (202), wherein the 3D item (1) comprises a plurality of layers (322) of 3D printed material (202), wherein at least part of the plurality of layers (322) comprises 3D printed material (202) comprising (i) a polymeric matrix material (211) that is transmissive for UV radiation, and (ii) a reflective material (212) that is reflective for the UV radiation and that is at least partly enclosed by the polymeric matrix material (211); wherein the reflective material (212) comprises a first fluoropolymer, and wherein the first fluoropolymer comprises a first microporous polytetrafluoroethylene.
11. The 3D item (1) according to claim 10, wherein at least part of the plurality of layers (322) comprises core-shell 3D printed material (202), wherein the core-shell 3D
40 printed material (202) comprises a core (260) and a shell (270), wherein the core (260) comprises a fiber (240) comprising the reflective material (212), and wherein the shell (270) comprises the polymeric matrix material (211).
12. The 3D item (1) according to any one of the preceding claims 10-11, wherein the 3D printed material (202) comprises particulate material (250) comprising the reflective material (212), wherein the particulate material (250) is embedded in the matrix material (211); wherein the particulate material (250) comprises a second reflective material (250) selected from the group of BaSCfi particles, TiCh particles, AI2O3 particles, silver particles, aluminum particles, and reflective flakes; wherein the 3D printed material (201) comprising a core (260) and a shell (270), wherein the core (260) comprises the reflective material (212) and wherein the shell (270) comprises the matrix material (211); and wherein one or more of the plurality of layers (322) of the 3D printed material (202) have a width (wl) and a height (hl), individually selected from the range of 0.1-10 mm; wherein the shell (270) has a largest shell width (wsmi), wherein the largest shell width (wsmi) is selected from the range of 2-15% of the width (wl).
13. A lighting device (1000) comprising the 3D item (1) according to any one of the preceding claims 10-12, wherein the 3D item (1) is configured as one or more of (i) at least part of a lighting device housing, (ii) at least part of a wall of a lighting chamber, and (iii) an optical element, wherein the lighting device (1000) comprises a light source (10) configured to generate UV radiation (11) having the one or more wavelengths selected from the range of 190-380 nm wherein the 3D item (1) is configured downstream of the light source (10).