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Re: [RC] Do Dixie Midnight Pads need to be replaced regularly? - Sisu West Ranch

Disclaimer:  The manufacturer of Dixie Midnight pads claims that his polymer is "proprietary"  and so secret that he can not tell anyone its chemical class.  He specifically claims that it is not plasticized vinyl.  I do not believe him, but you can if you wish.
My best guess is that Dixie Midnight pads are plasticized polyvinyl chloride coiled web, almost assuredly made by 3M Company.  Plasticized vinyl tends to loose its plasticizer after a few years of use.  This happens first in the pressure/flexing areas.  When the plasticizer goes, it becomes stiff and hard.  Examples: Older folk will remember how the vinyl covered hard tops and dashboards of cars got stiff and cracked after a few years
Plasticized polyvinylchloride is an extremely useful material.  It does need to be examined periodically and replaced when it starts to get stiff.  The time to failure depends on lots of things.  Some waffle weave "neoprene" girths are actually PVC.  Beta horse tack is PVC. 
Bottom line: Examine PVC horse tack frequently and replace it when it gets stiff.
Who shortly after the invention of more than 4 elements, worked on coiled web for 3M Company.
Ed & Wendy Hauser
2994 Mittower Road
Victor, MT 59875
(406) 642-9640

[RC] Do Dixie Midnight Pads need to be replaced regularly?, RISTREE