posts: 158883
Data license: Public Domain
This data as json
| post_id | thread_id | thread_title | post_number | author_username | post_date | post_date_iso | post_body |
|---|---|---|---|---|---|---|---|
| 158883 | 6778 | Shaper thread (show us what you are shaping) | 58 | JBorbone | Oct 17, 2019 | 2019-10-17T14:05:32-0400 | Bruce Fowler said: Great job. With no disrespect to anyone, sweeping generalizations regarding resin, cloth, or core used doesn't give each respective material its just due. The most recent development is polyester resins are much closer on a par to good quality epoxy resins than ever before. Fiberglass has evolved too in clarity, its ability to resist the rigors of ultraviolet exposure, impact resistance, and how it manages energy in flex, recovery and ultimately fatigue. Polyester cores have also evolved. We are now well past the what Clark Foam offered at their time of exit. Cell structure has become noticeable finer, harder, yet more resilient, and possesses superior shaping qualities in how the foams react to planer cuts and power sanding. In this brave new world, what was once considered the "conventional" surfboard building materials, can no longer be considered so "conventional". Taking a 2 lb. density core to new heights in its ability to resist the severe loading scenario even a 3 ft. wave exerts on its fulcrum is more remarkable than ever before. The advent and use of new polyols from sustainable resources is also commendable. All hail the modern day surfboard and its ultimate journey into the future! Click to expand... I geek out on the science behind this craft.. given my long terms goals with boardbuilding, and you're 100% accurate here.. I did a scientific study comparing all surfboard resins available on the market and #90 Isophthalic Polyester is nearly 1.25x stronger than Entropy Supersap Epoxy and on-par with Resin Research Epoxy. Strength measured by snap angle at 20 ppsi. |