Pointblanks describes their glass layers as “6-oz. E glass, and a layer of 4.7-oz. warp on the deck, with 4-oz. twist deck patch.” The E glass I understand, but is the 4.7 warp the same as “warp-bias E glass” and what’s “4-oz twist”? Would someone who has used warp-bias glass and the twist cloth weigh in on the advantages or disadvantages of using these (and why Pointblanks would use the combination they do)? Thanks.
i was told by a glasser to twist the cloth after laying it out. so the weave would have a twist, instead of the traditional parallel weave. he said it made the board just a small % stronger. not sure if his thoery holds up. does anyone do this?
The way they use the word twist sounds like a marketing term to me. Who knows want they mean. There is twist put into the individual strands of fiber in all woven fiberglass, this helps with a lot of issues including workability of the woven material. Taking this twist out makes a thinner weave, which can make a lighter board that also dents easier. Twisting the deck patch seams like a weird way to add strength, voodoo science. The strength of a composite laminate is dictated by the direction of the fibers, the straighter the better. That is one reason why boat builders use Non-crimp (stitched) fiberglass and aerospace companies use 5 and 8 harness satin weaves and unidirectional tapes. The fibers in these products are straighter than with plain weave fiberglasses used in surfboards.I guess if you wanted fibers going in random directions a light weight fiberglass or carbon veil (similar to mat) might work for a deck patch. Warp glass has more fiber going from nose to tail, or in the 0 degree direction, than from from rail to rail, or 90 degree direction also known as weft. This makes sense in a surfboard since the strength of the composite is dictated by the direction of the fibers. Sluggo