The purpose of interlayer sheets are mainly to stabilize and separate the product layers in a pallet during transport. In the production of these interlayers, materials such as homogene plastic sheets or different types of multilayer plastics such as Bubble Guard or twinwall sheets. The material of the interlayer sheets are chosen based on how heavy of a load it will carry. The different materials have several properties that differ, which is why it’s important to use a material that suits the application at hand. The Bubble Guard middle layer is made out of bubbles, whereas the twinwall sheets is structured with channels.
Twinwall sheets (left) vs BubbleGuard (right) .
Bubble Guard is a three-layer PP-material where the middle layer is made of bubbles that contain air, which makes the material very rigid in all directions. Bubble Guard is extremely light and also has the possibility of being laminated with different surface layers to obtain special properties, such as fabric, anti-skid, and anti-scratch.
Twinwall sheets can be used in interlayer sheets and can be treated with both VCI and ESD. The twinwall sheets can be delivered in thicknesses of 2-20 mm.
Homogene sheets are mainly used as interlayers for heavy products. They can be delivered with a rubber surface for increased friction. Based on the load that the interlayer should withstand, we choose channel plastic or Bubble Guard sheets, as well as material weight and thickness. By folding a bubble guard sheet on itself and punching one of the halves, we can create an interlayer which holds the products in place without having to invest in an expensive molding tool.
Grid mat with VCI is used as an interlayer in boxes for rust-sensitive products. The VCI-gas can travel freely through grid mats in the box, in order to ensure efficient rust protection.