Cutting grp sheet

[Bloomfield]

I'm pretty sure GRP (aka FRP) is just a generic term referring to glass-fibre and plastic resin composites, usually polyester or epoxy resin. I've never seen the term applied to thermoplastics, i.e. glass-filled nylon. The material in question is most likely just G10, FR4, or equivalent. Just a difference in terminology I think.

Andy

[bob p]

One nice thing about trade names like "garolite" and specific formulations like "G-10" is that they remove all of that ambiguity. Knowing that a specific product conforms to MIL-I-24768/27, UL 94V0 removes all ambiguity about it's worthiness for our application.

To further remove ambiguity: G-10 is a material type specification, and it's technically correct to use the term G-10 to identify a product. FR4 is a fire retardance rating, it's not a material type specification. When shopping we're looking for a G-10 product with a FR4 rating, not an FR4 product.

[Chuck H]

I'm pretty sure GRP (aka FRP) is just a generic term referring to glass-fibre and plastic resin composites, usually polyester or epoxy resin. I've never seen the term applied to thermoplastics, i.e. glass-filled nylon. The material in question is most likely just G10, FR4, or equivalent. Just a difference in terminology I think.

Andy

I suppose your right. I read "plastic" and I assumed thermoplastics. Usually if something is somehow better that is indicated in it's moniker. ie: Polyester Resin, Space Age Polymer or Catalyzed Epoxy. All plastics for sure, but where's the slick marketing in just calling them plastic Thinking about it now it makes sense because I don't know of any thermo plastics that would have the necessary bonding strength to take advantage of glass fiber reinforcement.

Ok, so, all of the above good advice from Bob applies

[Daver]

I use a 10" abrasive disc in my ancient table saw. It works perfectly, doesn't seem to dull and makes clean cuts.

Dave

[bob p]

wouldn't the abrasive disc make the substrate get hot? IME cutting metals abrasive disks end up heating the workpiece a lot. so i'd be concerned about heating the G10 board. otherwise the abrasive disc sounds like it could be a good option ... but boy oh boy, that type of cutter would put a lot more small particulate stuff into the air that I don't want to breathe. mask required. i recently went to a specialized saw for cutting ferrous metals so I wouldn't have to mess with abrasive discs any more. but for someone who doesn't want to commit to expensive tools, i think an abrasive disc would probably be a good way to go if it doesn't heat the board enough to give it burn marks.

[Daver]

No, it doesn't heat it up. I never noticed the material melting at all and no marks on the edges. It does make a fine dust, so a mask is a must. I also like that it doesn't chip the material at all.

Dave