Molded article and method for manufacturing molded article
View Patent ↗Provided is a molded article which contains a first enclosure; a second enclosure adjoined with the first enclosure; and a transparent member held by the second enclosure, each of the first enclosure and the second enclosure being independently made from a resin composition that contains a polyamide resin having a semi-crystallization time of 10 to 60 seconds, and a melting point of 200 to 280° C., and the transparent member having a pencil hardness of 8H or larger, and a linear expansion coefficient of 1×10 −6 to 9×10 −6 /° C., where the semi-crystallization time means a time measured by depolarization photometry at a temperature 20° C. higher than the melting point of the polyamide resin, for a melting time of polyamide resin of 5 minutes, and at a temperature of crystallization bath of 150° C.
1. A molded article comprising:
a first enclosure;
a second enclosure adjoined with the first enclosure; and
a transparent member held by the second enclosure,
each of the first enclosure and the second enclosure being independently made from a resin composition that contains a polyamide resin having a semi-crystallization time of 10 to 60 seconds, and a melting point of 200 to 280° C., and
the transparent member having a pencil hardness of 8H or larger, and a linear expansion coefficient of 1×10 −6 to 9×10 −6 /° C.,
where the semi-crystallization time means a time measured by depolarization photometry at a temperature 20° C. higher than the melting point of the polyamide resin, for a melting time of polyamide resin of 5 minutes, and at a temperature of crystallization bath of 150° C., and
where the molded article has a hollow structure isolated from an outside, which is formed by at least the first enclosure, the second enclosure and the transparent member.
2. The molded article of claim 1 , wherein the polyamide resin comprises a diamine-derived structural unit and a dicarboxylic acid-derived structural unit; in which 50 mol % or more of the diamine-derived structural unit is originated from xylylenediamine, and 70 mol % or more of the dicarboxylic acid-derived structural unit is originated from a straight-chain aliphatic α,ω-dicarboxylic acid having 4 to 20 carbon atoms.
3. The molded article of claim 1 , wherein the polyamide resin contained in the first enclosure and the polyamide resin contained in the second enclosure have melting points, with a difference of 50° C. or smaller.
4. The molded article of claim 1 , wherein the first enclosure and the second enclosure independently contain fillers.
5. The molded article of claim 1 , wherein one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
6. The molded article of claim 1 , wherein the transparent member is composed of a glass.
7. The molded article of claim 1 , being a camera part.
8. The molded article of claim 2 , wherein the polyimide resin contained in the first enclosure and the polyamide resin contained in the second enclosure have melting points, with a difference of 50° C. or smaller.
9. The molded article of claim 2 , wherein the first enclosure and the second enclosure independently contain fillers.
10. The molded article of claim 2 , wherein one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
11. The molded article of claim 3 , wherein the first enclosure and the second enclosure independently contain fillers.
12. The molded article of claim 3 , wherein one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
13. The molded article of claim 3 , wherein the transparent member is composed of a glass.
14. The molded article of claim 4 , wherein one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
15. The molded article of claim 4 , wherein the transparent member is composed of a glass.
16. The molded article of claim 2 , wherein the polyamide resin contained in the first enclosure and the polyamide resin contained in the second enclosure have melting points, with a difference of 50° C. or smaller;
wherein the first enclosure and the second enclosure independently contain fillers; and
one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
17. A method for manufacturing the molded article according to claim 1 , the method comprising:
adjoining a first enclosure and a second enclosure by heat welding,
the second enclosure holding a transparent member,
each of the first enclosure and the second enclosure being independently made from a resin composition that contains a polyamide resin having a semi-crystallization time of 10 to 50 seconds, and a melting point of 200 to 280° C., and
the transparent member having a pencil hardness of 8H or larger, and a linear expansion coefficient of 1×10 −6 to 9×10 −6 /° C.,
where the semi-crystallization time means a time measured by depolarization photometry at a temperature 20° C. higher than the melting point of the polyamide resin, for a melting time of polyamide resin of 5 minutes, and at a temperature of crystallization bath of 150° C.
18. The method for manufacturing a molded article of claim 17 , wherein the heat welding is laser welding.
19. The method for manufacturing a molded article of claim 17 , wherein one of the first enclosure and the second enclosure contains a light-absorbing dye, and the other contains a light-transmitting dye.
20. The method for manufacturing a molded article of claim 17 , wherein the polyamide resins contained in the first enclosure and the polyamide resin contained in the second enclosure have melting points, with a difference of 50° C. or smaller.
21. A molded article comprising:
a first enclosure;
a second enclosure adjoined with the first enclosure; and
a transparent member held by the second enclosure,
each of the first enclosure and the second enclosure being independently made from a resin composition that contains a polyamide resin having a semi-crystallization time of 10 to 60 seconds, and a melting point of 200 to 280° C., and
the transparent member having a pencil hardness of 8H or larger, and a linear expansion coefficient of 1×10 −6 to 9×10 −6 /° C.,
where the semi-crystallization time means a time measured by depolarization photometry at a temperature 20° C. higher than the melting point of the polyamide resin, for a melting time of polyamide resin of 5 minutes, and at a temperature of crystallization bath of 150° C., and where the first enclosure has a connector.
22. The molded article of claim 1 , wherein the first enclosure has a connector.