Butt-cut: Adhesive or a material laminated to adhesive that has been cut across the web and through the material but not through the release liner. Parts are "butted" together with no space between them in rolls.

Closed cell foam: A plastic or rubber that has been expanded into a foam using a blowing agent that creates tiny "air" cells. Cell walls are not connected to each other. Blocks air and liquid passage. Good for gaskets and seals.

Compression Deflection: The force required to compress a specific thickness and square area a given amount. Relates to the softness or hardness of a foam.

Compression set: The amount of permanent thickness loss, expressed as a percentage, a material loses after being compressed.

Density: The weight of a material per unit of volume. Density is commonly expressed in pounds per square foot.

Double coated tape: A pressure-sensitive tape consisting of a carrier material with the same or different adhesive types on each side. Can come self wound with a liner on one side or with two liners.

Flock: A polyester non-woven fabric with a soft cut pile resembling velvet or velour.

Foam tape: A plastic foam, such as cross-linked polyethylene foam, with pressure-sensitive adhesive on both sides.

Initial tack: The amount of adhesion or bond an adhesive develops with a substrate when first applied.

Kiss cut: A method of die cutting adhesive backed materials where the adhesive and material are cut through, but not the supporting release liner. Allows die cut parts to be put up in rolls.

Open cell foam: A plastic or rubber that has been expanded into a foam using a blowing agent that creates tiny "air" cells. Cell walls are connected to each other. The cell structure will permit the passage of liquids and gases to varying degrees. Excellent for cushion, padding, or acoustical absorption.

Pattern adhesive: Adhesive applied in a pre-determined pattern to the back of a substrate; the result of a die cutting method utilizing multiple dies.

 

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