ArthurC wrote: ↑Thu Jan 31, 2019 7:27 am
...I want to design one with material that is more comfortable for people that find it helpful...
Silk probably should not be the "load-bearing" material, but whatever material you choose to handle the load-bearing, you could certainly use silk lining. Adding a silk lining might be over the limit for labor & materials if you are trying to keep costs down though...
From the chin-straps I've tried, I think to keep it from pulling the jaw back, the strap doing the lifting needs to go over the top of the head as far forward as possible, which means you will need a smaller strap(s) going around the back of the head that prevents the "over the top" strap from slipping forward. Seems more likely than not it will still tend to put rearward pressure to some extent on the chin if it's taught enough to keep your jaw up.
In my experience (and experiences will vary) no matter what I used - even with a headband over my mouth, I still had mouth leaks because even with your jaw clenched shut, you can still exhale through relaxed lips. I ultimately gave up on a chin-strap and now use a full face mask. Mouth leaks are no longer an issue that wakes me during the night, but I still get the morning " CPAP-Dry-Mouth" a couple/few times a week. I think that if you are like me, prone to mouth leaks and can't train yourself to keep the CPAP air from entering the back of your mouth, then the surest solution for the majority of folks is to glue your lips shut somehow or learn to tolerate a FFM.
Good luck with it,
-JD
If you're not having a good time, *DO* something about it.