Polystyrene should never be cut with ordinary knives heated by application to a direct heat source. Cutting polystyrene with a hot wire generates phenylethene fumes. The cutter should be constructed to operate at an even heat, which is just sufficient to cut the material.
What is the best tool to cut Styrofoam?
Hot Knife. A hot knife is our top choice for cutting Styrofoam. A heated knife is ideal for making small cuts and leaves minimal mess compared to a normal serrated knife. The key is to use a sawing motion when cutting instead of pushing straight down.
Can you cut expanding foam with a hot knife?
Expanded Polystyrene, Known as EPS, this is the most common foam for hot wiring as it is strong, lightweight, inexpensive and cuts very easily with a hot wire or hot knife.
What does polystyrene look like?
Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is an inexpensive resin per unit weight. It is a poor barrier to oxygen and water vapour and has a relatively low melting point.
Is XPS foam toxic?
Most rigid polystyrene foam insulation boards, both the EPS and XPS types, contain the toxic flame retardant HBCD, which was banned by the European Union in 2015.
Can you cut Styrofoam with a table saw?
You can generally use a utility knife when there are slighter cutting requirements of foam board insulation. If you need several cuts, you can use a circular, jigsaw, or table saw to save time and effort.
How do you cut polyethylene foam?
It may be possible to use scissors, depending on how thick the foam is and if you find it easier than using the craft knife to get the right shape. If your polyethylene roll is less than 5mm thick, sharp scissors should do the job for you.
How do you cut large blocks of Styrofoam?
The hot knife is our preferred method of cutting Styrofoam. It has the advantage over other knives because the heat seals the Styrofoam as it cuts. When you seal a cut, there’s less chance of creating the little Styrofoam beads that can often accompany cutting.
