Small portable instrument
View Patent ↗A miniature portable equipment in the present invention comprising a packing comprising a butyl rubber having a crosslinking structure composed of carbon to carbon bonds of the formula:
1. A miniature portable equipment comprising a packing comprising a butyl rubber having a crosslinking structure composed of carbon to carbon bonds of the formula:
wherein the butyl rubber is a butyl rubber having a crosslinking structure wherein no sulfur is incorporated and is derived from a halogenated butyl rubber.
2. The miniature portable equipment as claimed in claim 1 , wherein the halogenated butyl rubber is a chlorobutyl rubber.
3. The miniature portable equipment as claimed in claim 1 , wherein the butyl rubber is contained in the packing in an amount of 45.0 to 65.0% by weight.
4. The miniature portable equipment as claimed in claim 1 , wherein the packing exhibits a compression set of 15% or less as measured under a compression ratio of 25% at 80° C. after 72 hr (according to testing method specified in Japanese Industrial Standard (JIS) K6262).
5. The miniature portable equipment as claimed in claim 1 , wherein the packing exhibits a rubber hardness of A50 to A65 (as measured according to testing method specified in Japanese Industrial Standard (JIS) K6253).
6. The miniature portable equipment as claimed in claim 1 , which is a wristwatch.
7. The miniature portable equipment as claimed in claim 6 , which is a wristwatch having a movement of long-life specification wherein use is made of a long-life battery or a solar cell, or having a movement of mechanical specification wherein no battery is needed.
8. The miniature portable equipment as claimed in claim 1 , which is a miniature portable information equipment terminal.
9. The miniature portable equipment as claimed in claim 2 , wherein the butyl rubber is contained in the packing in an amount of 45.0 to 65.0% by weight.
10. The miniature portable equipment as claimed in claim 2 , wherein the packing exhibits a compression set of 15% or less as measured under a compression ratio of 25% at 80° C. after 72 hr (according to testing method specified in Japanese Industrial Standard (JIS) K6262).
11. The miniature portable equipment as claimed in claim 3 , wherein the packing exhibits a compression set of 15% or less as measured under a compression ratio of 25% at 80° C. after 72 hr (according to testing method specified in Japanese Industrial Standard (JIS) K6262).
12. The miniature portable equipment as claimed in claim 2 , wherein the packing exhibits a rubber hardness of A50 to A65 (as measured according to testing method specified in Japanese Industrial Standard (JIS) K6253).
13. The miniature portable equipment as claimed in claim 3 , wherein the packing exhibits a rubber hardness of A50 to A65 (as measured according to testing method specified in Japanese Industrial Standard (JIS) K6253).
14. The miniature portable equipment as claimed in claim 4 , wherein the packing exhibits a rubber hardness of A50 to A65 (as measured according to testing method specified in Japanese Industrial Standard (JIS) K6253).
15. The miniature portable equipment as claimed in claim 2 , which is a wristwatch.
16. The miniature portable equipment as claimed in claim 3 , which is a wristwatch.
17. The miniature portable equipment as claimed in claim 4 , which is a wristwatch.
18. The miniature portable equipment as claimed in claim 5 , which is a wristwatch.
19. The miniature portable equipment as claimed in claim 2 , which is a miniature portable information equipment terminal.
20. The miniature portable equipment as claimed in claim 5 , which is a miniature portable information equipment terminal.
21. The miniature portable equipment as claimed in claim 4 , which is a miniature portable information equipment terminal.
22. The miniature portable equipment as claimed in claim 5 , which is a miniature portable information equipment terminal.