I think that quite high percentages of DuPont's Selar are required to give the desired effect.
I guess that the barrier gets better with the amount used. I think 10% is the starting point, but I suggest you contact your local DuPont dealer.
Good Luck,
Robin Enderby
BMC Ltd. UK
ps sorry for the...
There are books on this subject.
Have a look at the Society of Plastics /Engineers site 4SPE.org
Contact Mergon Inc http://www.mergon.com/eng_mergon/index.htm
They blow mold lots of cases for things like electric drills.
They have a plant in S.C. and are a customer of mine.
They a very...
Have a look at the Closure Manufacturers Association site.
The have loads of pdf drawings of neck finishes, although I could not see information on snap caps.
www.cmadc.org/index2.tpl
The Society of Plastics Industries (SPI) also has bottle neck finish drawings in pdf format for free download...
DuPont sell a Nylon type of material called SELAR that is used as an additive to PE to give it barrier properties.
This is used to lower the permeation in blow moulded bottles and drums.
The principle is mechanical in that the Nylon forms platelets and like overlapping armour this produces a...
Blow Molding TPU's is a bit more difficult than 'popular' materials like Polyethelene or PVC.
Hytrel and Santoprene TPU's are used a lot for car parts.
The melt strength of TPU's can be low so that the parison stretches while hanging. This causes the molding to thin towards the top.
This makes...
I suggst you contact the companies that produce material dryers. They should be able to recommend or sell you a tester that works in the range you need.
General purpose hygrometers may have a range of measurment much greater than the moisture levels you will be measuring.
I use alltheweb.com for...
