Spectra nylon sling question

So I got some blood on my runner which is made from spectra/nylon mix (Bluewater titan runner). Not a lot of blood but the material is stained. Is this a concern?

yer gonna die.

i wouldn't be too concerned. i doubt the bit of blood can weaken the sling too much. if you're conerned then use the sling for non-weight bearing things like racking your gear.

also yer gonna die.

What blood type? A?

I knew I was going to catch shit for this post hahahah

Nylon & polyethylene are both very resistant to chemicals. I peed on a rope once & it still works. A chemistry bird i know once told me "if you can put it on your skin & leave it there without ill effects, it shouldn't damage your softwares" Key word being "shouldn't", but he may just have it out for me. We're probably both gonna die......

Unless you look like this, you should be ok.

They mostly come at night. Mostly...

Blood has a pH of 7.35 (slightly basic), it is not going to damage your sling. Vomit is probably the worst bodily fluid for your gear, vomit usually has a pH around 2 (quite acidic).

What if you vomit blood on your sling?

Avalon'cha wrote:Nylon & polyethylene are both very resistant to chemicals. I peed on a rope once & it still works. A chemistry bird i know once told me "if you can put it on your skin & leave it there without ill effects, it shouldn't damage your softwares" Key word being "shouldn't", but he may just have it out for me. We're probably both gonna die......

They are somewhat resistant to chemicals. There are plenty of chemicals that, even in extremely small quantities, can easily destroy nylon. I would say your chemistry bird is wrong. I've put my arm in 10% by solution sulfuric acid with absolutely no noticeable effect. The only reason why I even knew it was sulfuric acid was because someone told me and showed me the container the solution came from. Granted it was only 10% solution, but that's still enough to cause a climbing rope to fail on a TR fall alone. Also, chlorinated water can damage nylon, but it wont harm your skin. Isopropyl alcohol (rubbing alcohol) will damage nylon, but it's a key component in solutions designed to be poured in your ear after swimming (e.g. Swim Ear). Antifreeze will damage nylon as well, but again I've spilt it on myself without effect. Hydrogen peroxide will damage nylon, and it's marketed as a topical first aid antibiotic. I could go on but you get the point.

OP: Blood wont damage nylon.

20 kN wrote: They are somewhat resistant to chemicals. There are plenty of chemicals that, even in extremely small quantities, can easily destroy nylon.

Starting point: calpaclab.com/nylon-chemica…

Were you well hydrated? Do you smoke? Was the sling vaccinated?

Nylon has good chemical resistance, but spectra is generally regarded as having excellent resistance[1].

To make things a bit more complex, what's the thread used for the bartacks made of? Probably nylon? But possibly polyester?

(People always focus on nylon chemical compatibility when talking about what's OK to spill on climbing gear, but my gear's a mix of nylon, polyester and dyneema - any of which failing is going to lead to me being dead.)

[1] For example see honeywell-spectra.com/?docu… - (I don't know if all spectra comes from honeywell, or if they have different offerings of it that behave slightly differently - so don't take my word for that datasheet being definitive...)

r m wrote:Nylon has good chemical resistance, but spectra is generally regarded as having excellent resistance[1]. To make things a bit more complex, what's the thread used for the bartacks made of? Probably nylon? But possibly polyester? (People always focus on nylon chemical compatibility when talking about what's OK to spill on climbing gear, but my gear's a mix of nylon, polyester and dyneema - any of which failing is going to lead to me being dead.) [1] For example see honeywell-spectra.com/?docu… - (I don't know if all spectra comes from honeywell, or if they have different offerings of it that behave slightly differently - so don't take my word for that datasheet being definitive...)

What do you have that's made of polyester? Most bar tacks are made out of nylon. Spectra is a brand of Honneywell, so yes all Spectra comes from Honeywell. But it's just a brand name, not a type of material. Same with Dyneema. Dyneema is owned by DSM and it's just a brand name. Spectra, Dyneema, Amsteel, these are brands of the same material--polyethylene.

20 kN wrote: What do you have that's made of polyester?

My harness webbing. climbingbusinessjournal.com…

20 kN wrote: What do you have that's made of polyester?

The sheath of my static rope. cmcrescue.com/equipment/476/

20 kN wrote: What do you have that's made of polyester?

My leisure suit.

Jim Titt wrote: My harness webbing. climbingbusinessjournal.com…

I had thought that might have been a mistake in that article. Following the link to the original BD source article, it is indeed correct that BD harnesses are made with a mix of nylon and polyester webbing.

Robert Cort wrote:Blood has a pH of 7.35 (slightly basic), it is not going to damage your sling. Vomit is probably the worst bodily fluid for your gear, vomit usually has a pH around 2 (quite acidic).

pH has essentially nothing to do with nylon chemical resistance. Some of the most damaging chemicals and solvents have a pH well above 7.