Camera Module

• US 20180086914A1
• Filed: 11/17/2017
• Published: 03/29/2018
• Est. Priority Date: 04/09/2014
• Status: Active Grant

• Current Assignee: Ticona LLC (Celanese Corporation)
• Original Assignee: Ticona LLC (Celanese Corporation)
• Inventors: Kim, Young Shin
• Granted Patent: US 10,640,648 B2
• Time in Patent Office: Days
• CPC Class Codes: C08K 2003/3045 Sulfates
• CPC Class Codes: C08K 2003/325 Calcium, strontium or barium phosphate
• CPC Class Codes: C08K 2201/003 Additives being defined by their diameter
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/32 Phosphorus-containing compounds
• CPC Class Codes: C08K 7/10 Silicon-containing compounds
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 67/03 the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
• CPC Class Codes: C08L 77/12 Polyester-amides
• CPC Class Codes: C09K 19/38 Polymers
• CPC Class Codes: C09K 19/3809 Polyesters; Polyester derivatives, e.g. polyamides
• CPC Class Codes: C09K 2019/521 Inorganic solid particles

Abstract

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.

Claims

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.

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. The camera module of claim 1, wherein the molded part has a Rockwell hardness of about 40 more, as determined in accordance with ASTM D785-08 (Scale M).

20. 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.

21. The polymer composition of claim 20, wherein the inorganic particles have a hardness value of from about 3.0 to about 11.0 based on the Mohs hardness scale.

22. The polymer composition of claim 20, 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.

23. The polymer composition of claim 20, wherein the inorganic particles include calcium pyrophosphate or barium sulfate.

24. The polymer composition of claim 20, the mineral fibers include wollastonite.

25. The polymer composition of claim 20, 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.