Welcome to ScubaBoard, an online scuba diving forum community where you can join over 205,000 divers diving from around the world. If the topic is related to scuba diving, this is the place to find divers talking about it. To gain full access to ScubaBoard (and make this large box go away) you must register for a free account. As a registered member you will be able to:
Participate in over 500 dive topic forums and browse from over 5,500,000 posts.
Communicate privately with other divers from around the world.
Post your own photos or view from well over 100,000 user submitted images.
Gain access to our free classifieds marketplace to buy, sell and trade gear, travel and services.
Use the calendar to organize your events and enroll in other members' events.
Find a dive buddy or communicate directly with scuba equipment manufacturers.
All this and much more is available to you absolutely free when you register for an account, so sign up today!
If you have any problems with the registration process or your account login, please contact the ScubaBoard Support Team.
In a time of universal deceit, telling the truth is a revolutionary act. -George Orwell
Given that our biggest fear, death, is inescapable, doesn’t it seem ridiculous to let our smaller fears dictate how we live our too short lives? -Me
“It is said that power corrupts, but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power.” -- David Brin
well it is what the inner bladder is made of. I also googled it and found quite a bit that explained it further.
What exactly are you trying to find out? If just thickness I can measure it but why? It could be thick as all get out and still not be durable if the right material wasn't used. In addition the outer bladder plays into things...
In a time of universal deceit, telling the truth is a revolutionary act. -George Orwell
Given that our biggest fear, death, is inescapable, doesn’t it seem ridiculous to let our smaller fears dictate how we live our too short lives? -Me
“It is said that power corrupts, but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power.” -- David Brin
By refering to the inner bladder in terms of denier, I would assume it is made from a woven fabric (as opposed to the commonly seen sheet polyurethane).
well it is what the inner bladder is made of. I also googled it and found quite a bit that explained it further.
What exactly are you trying to find out? If just thickness I can measure it but why? It could be thick as all get out and still not be durable if the right material wasn't used. In addition the outer bladder plays into things...
I was just trying to understand your answer. I thought I understood "220 denier" to be a fabric material, perhaps nylon, and requires some type of coating to be sealed. I understood 220 to be a relatively light material. Many BCDs that I am familiar with are bladderless, being made of coated nylon materials - often 220 or 440 denier. I do have one wing that has a nylon shell and a urethane bladder. I don't believe I have seen a BCD that uses an outer shell and a separate inner bladder that also uses a denier material. I agree, thickness is not necessarily the key. I would probably focus more on durability, puncture resistance, and weight.
I was just trying to understand your answer. I thought I understood "220 denier" to be a fabric material, perhaps nylon, and requires some type of coating to be sealed. I understood 220 to be a relatively light material. Many BCDs that I am familiar with are bladderless, being made of coated nylon materials - often 220 or 440 denier. I do have one wing that has a nylon shell and a urethane bladder. I don't believe I have seen a BCD that uses an outer shell and a separate inner bladder that also uses a denier material. I agree, thickness is not necessarily the key. I would probably focus more on durability, puncture resistance, and weight.
My inner bladder is made exactly like bladderless BCD's, the reason I don't do urethane only inner bladders is that my experience has shown me that they can get pinched and cut fairly easily. By doing it the way I do I make a much more durable wing.
In a time of universal deceit, telling the truth is a revolutionary act. -George Orwell
Given that our biggest fear, death, is inescapable, doesn’t it seem ridiculous to let our smaller fears dictate how we live our too short lives? -Me
“It is said that power corrupts, but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power.” -- David Brin
A denier is a unit of measurement for the linear density of fibers used on single and dual filament fibers, equal to the mass in grams per 9000 meters. One strand of silk (the standard) that is 9000 meters long weighs 1 gram and has a denier of one. The formula for calculating the diameter (thickness) of a filament with a known denier (where where ρ represents the material's density in grams per cubic centimeter and the diameter is in cm):
Which is to say that OP asked the wrong question when he wanted to know how "thick" the material is, although it was an understandable error. As the threads (yarn) of a woven fabric overlay each other the thickness will vary by at least 100%, making thickness a difficult and relatively pointless measurement. The fabric characteristics we're really interested in include the tensile strength, tear strength, pliability, adhesion qualities, resistance to chemicals and radiation, just to name a few.
More is not always better: too heavy (a better way to think of denier than "thick") and the fabric loses it's pliability and tote-ability. Nobody wants a wing that is as stiff as their BCD webbing or one that causes hernias when picked up. Compromises have to be made and 220 denier is a popular balance of durability, flexibility and weight for BCD wings.
If you haven't done it, please think about supporting SB, this is a great place to hang, and as a supporter it's only $3.95/mo. Just go to the "community" tab and "Go red". Thanks!
7Likes
LinkBack URL
About LinkBacks
Reply With Quote
Originally Posted by cerich
