Whats your take on DHP? Is it significantly stronger than Epoxy? Pros and cons of each resin?
DHP has very good elongation which translates into good impact strength. For standard weight boards this means better ding resistance. We produce two different resins one with excellent stiffness that is somewhat brittle (2000) and another that has excellent elongation and ding resistance(2020). When making very light boards, you need to use a very stiff resin so the board will have good stiffness with a light glass job. This makes the board a bit more fragile but gives excellent performance. When building a heavier board, more resin and glass will give you a laminate with a higher mill thickness which will, of course, give you added stiffness but with less performance. DHP can only offer one resin because urethane resins are flexible by nature. Epoxies are more versatile and can offer a wider range of features for different applications. There are also the problems associated with using urethanes in production, ie. heat curing, airbrush and label issues and sensitization problems now cropping up among the workers using it.
Thanks, Greg. I sort of initiated this issue about DHP. Jason then raised it up to you. When you talk about resins 2000 & 2020 you’re talking about epoxies, correct? It was a little unclear. It’s disappointing to hear that there may be health consequences with the DHP. Out of curiosity, what’s the scoop with no airbrushing with DHP? Is it a chemical compatibility thing or does the paint prevent the resin from adhering to the blank properly or what?
Greg Loehr wrote “DHP has very good elongation which translates into good impact strength. For standard weight boards this means better ding resistance. We produce two different resins one with excellent stiffness that is somewhat brittle (2000) and another that has excellent elongation and ding resistance(2020). When making very light boards, you need to use a very stiff resin so the board will have good stiffness with a light glass job. This makes the board a bit more fragile but gives excellent performance. When building a heavier board, more resin and glass will give you a laminate with a higher mill thickness which will, of course, give you added stiffness but with less performance. DHP can only offer one resin because urethane resins are flexible by nature. Epoxies are more versatile and can offer a wider range of features for different applications. There are also the problems associated with using urethanes in production, ie. heat curing, airbrush and label issues and sensitization problems now cropping up among the workers using it”. ----------------------------------------------------------------- This sounds alot like some of the issues I heard with epoxy many years ago. I guess this resin system is just not ready for prime time. Not to mention its just not feesable for most manufacurers. For my money im going with resin research epoxy.
what about people who like a little flex in their board?
2000 and 2020 are both epoxies. As far as which you chose to use, that is strictly up to you. We offer both, both work the same in production and use any of the three hardeners. We are the first company I know of that offers two resins with differing flex characteristics. This gives companies the option to build beyond the typical single resin systems. So, if you want more flex in your board, sling, use 2020.