Camera module
A camera module containing a molded part (e.g., generally planar base, lens barrel mounted on the base, etc.) that is formed form a polymer composition is provided. The polymer composition includes a liquid crystalline polymer and inorganic particles that have a hardness value of about 2.5 or more based on the Mohs hardness scale.
1. A camera module that comprises a molded part, wherein the molded part is formed from a polymer composition that comprises a thermotropic liquid crystalline polymer and inorganic particles having a hardness value of about 2.5 or more based on the Mohs hardness scale, wherein the inorganic particles have a median width of from about 0.1 to about 35 micrometers, and wherein the molded part has a Rockwell hardness value from 40 to 63 as determined in accordance with ASTM D785-08 (Scale M).
2. The camera module of claim 1 , wherein the camera module comprises a generally planar base on which is mounted a lens barrel, wherein the base, barrel, or both contain the molded part.
3. The camera module of claim 1 , wherein the molded part has a thickness of about 500 micrometers or less.
4. The camera module of claim 1 , wherein the inorganic particles have a hardness value of from about 3.0 to about 11.0 based on the Mohs hardness scale.
5. The camera module of claim 1 , wherein the inorganic particles include calcium carbonate, copper carbonate hydroxide, calcium fluoride, calcium pyrophosphate, anhydrous dicalcium phosphate, hydrated aluminum phosphate, silica, potassium aluminum silicate, copper silicate, calcium borosilicate hydroxide, alumina, or a combination thereof.
6. The camera module of claim 1 , wherein the inorganic particles include calcium pyrophosphate.
7. The camera module of claim 1 , wherein the inorganic particles include barium sulfate.
8. The camera module of claim 1 , wherein the inorganic particles constitute from about 3 wt. % to about 60 wt. % of the polymer composition.
9. The camera module of claim 1 , wherein liquid crystalline polymers constitute from about 25 wt. % to about 95 wt. % of the composition.
10. The camera module of claim 1 , wherein the liquid crystalline polymer contains aromatic ester repeating units.
11. The camera module of claim 10 , wherein the aromatic ester repeating units are aromatic dicarboxylic acid repeating units, aromatic hydroxycarboxylic acid repeating units, or a combination thereof.
12. The camera module of claim 10 , wherein the polymer further contains aromatic diol repeating units.
13. The camera module of claim 1 , wherein the liquid crystalline polymer contains repeating units derived from 4-hydroxybenzoic acid, terephthalic acid, hydroquinone, 4,4′-biphenol, acetaminophen, 6-hydroxy-2-naphthoic acid, 2,6-naphthelene dicarboxylic acid, or a combination thereof.
14. The camera module of claim 1 , wherein the polymer composition further comprises mineral fibers.
15. The camera module of claim 14 , wherein the mineral fibers include fibers derived from a silicate.
16. The camera module of claim 15 , wherein the silicate is an inosilicate.
17. The camera module of claim 16 , wherein the inosilicate includes wollastonite.
18. The camera module of claim 1 , further comprising a conductive filler, glass filler, silicate filler, functional compound, or a combination thereof.
19. A polymer composition comprising from about 25 wt. % to about 95 wt. % of at least one thermotropic liquid crystalline polymer, from about 1 wt. % to about 40 wt. % of mineral fibers, and from about 3 wt. % to about 60 wt. % of inorganic particles having a hardness value of about 2.5 or more based on the Mohs hardness scale, wherein the inorganic particles have a median width of from about 0.1 to about 35 micrometers, and wherein a molded part formed from the polymer composition has a Rockwell hardness value from 40 to 63 as determined in accordance with ASTM D785-08 (Scale M).
20. The polymer composition of claim 19 , wherein the inorganic particles have a hardness value of from about 3.0 to about 11.0 based on the Mohs hardness scale.
21. The polymer composition of claim 19 , wherein the inorganic particles include calcium carbonate, copper carbonate hydroxide, calcium fluoride, calcium pyrophosphate, anhydrous dicalcium phosphate, hydrated aluminum phosphate, silica, potassium aluminum silicate, copper silicate, calcium borosilicate hydroxide, alumina, or a combination thereof.
22. The polymer composition of claim 19 , wherein the inorganic particles include calcium pyrophosphate or barium sulfate.
23. The polymer composition of claim 19 , the mineral fibers include wollastonite.
24. The polymer composition of claim 19 , wherein the mineral fibers have an average width of from about 0.1 to about 35 micrometers and an aspect ratio of from about 1 to about 50.