# I need some plastic help

**URL:** https://forums.yoyoexpert.com/t/i-need-some-plastic-help/48846
**Category:** Looking for Help/Recommendation
**Created:** [January 30, 2013, 6:01pm UTC](https://forums.yoyoexpert.com/t/i-need-some-plastic-help/48846 "2013-01-30T18:01:29Z")
**Posts on this page:** 1
**Showing post:** 12

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### Author: ![Tuxedodave](https://avatars.discourse-cdn.com/v4/letter/t/9e8a1a/32.png) [@Tuxedodave](https://forums.yoyoexpert.com/u/Tuxedodave)
#### Post date: [January 31, 2013, 9:43am UTC](https://forums.yoyoexpert.com/t/i-need-some-plastic-help/48846/12 "2013-01-31T09:43:51Z")

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> [@delrin](https://forums.yoyoexpert.com/t/delrin/46902/13):
>
> > [@Big\_Yoyo](#):
> >
> > Delrin is a name brand of Celcon, FYI. Like Kleenex is to a tissue
> 
> That’s not quite right. Delrin and Celcon are both name brands of POM Plastic, but they’re a bit different.  
> To quote this guy who actually corrected me a bit ago when I said they were exactly the same,
> 
> > [@delrin](https://forums.yoyoexpert.com/t/delrin/46902/13):
> >
> > They are _practically_ the same, but not _exactly_. Delrin is homopolymer while Celcon is copolymerized for easier injection molding. The reason for this is due to the dramatic shrinkage that homopolymer POM undergoes during injection molding. The copolymer version still shrinks like heck, though, just a bit more managable.

You said homopolymer goes through dramatic shrinkage…hehehe I’m so immature

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