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2. Playground surfacing - Wikipedia

   en.wikipedia.org/wiki/Playground_surfacing

   Poured rubber surfacing: This is a seamless rubber surface composed of two layers that is poured in place (PIP). The first layer, or "wear layer", is typically 3 ⁄ 8 inch (9.5 mm) thick and made of EPDM or TPV granules. The second layer, or "cushion layer", is 1–5 inches (25–127 mm) thick and made of crumb rubber or recycled rubber tires.

3. Access mat - Wikipedia

   en.wikipedia.org/wiki/Access_mat

   Common dimensions are 8' x 14' and 8' x 16'. Thicknesses vary between suppliers from 4.5” to a full 6”. Swamp mats are produced by many small and medium-sized manufacturers, and quality varies dramatically within the industry. Rig mats, another variety of access mats, may also known as wood and steel mats or steel frame mats

4. Mat (gymnastics) - Wikipedia

   en.wikipedia.org/wiki/Mat_(gymnastics)

   Mats are used for safety in gymnastics, and in training new skills. They are usually a piece of foam (covered in leather) ranging from 1.5 to 28 inches thick, covered in a vinyl or plastic lining. The foam ranges in density from relatively firm to very soft. Landing mats are usually blue but can be almost any other color.

5. Tire manufacturing - Wikipedia

   en.wikipedia.org/wiki/Tire_manufacturing

   After mixing, the rubber charge is dropped into a chute and fed by an extruding screw into a roller die. Alternatively, the batch can be dropped onto an open rubber mill batch-off system. A mill consists of twin counter-rotating rolls, one serrated, that provide additional mechanical working to the rubber and produce a thick rubber sheet.

6. Foam rubber - Wikipedia

   en.wikipedia.org/wiki/Foam_rubber

   Foam rubber yoga mat. Foam rubber (also known as cellular rubber, sponge rubber, or expanded rubber) is rubber that has been made with a foaming agent so that its structure is an air-filled matrix. Commercial foam rubber is generally made of synthetic rubber, natural latex, or polyurethane. Latex foam rubber, used in mattresses, is well known ...

7. Marston Mat - Wikipedia

   en.wikipedia.org/wiki/Marston_mat

   Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and landing strips (also misspelled as Marsden matting).