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2. Punched pocket - Wikipedia

   en.wikipedia.org/wiki/Punched_pocket

   Three punched pockets. A punched pocket (UK English), plastic wallet (UK English), poly pocket (UK English), slippery fish (Sussex, England), sheet protector (US English), plastic sleeves (AU English), “page protector” (US English), or sometimes perforated document bag, is a flat, slit plastic bag with a perforated edge used to hold paper documents.

3. Perfboard - Wikipedia

   en.wikipedia.org/wiki/Perfboard

   Top of a copper clad Perfboard with solder pads for each hole. Perfboard is a material for prototyping electronic circuits.It is a thin, rigid sheet with holes pre-drilled at standard intervals across a grid, usually a square grid of 0.1 inches (2.54 mm) spacing.

4. Perforated metal - Wikipedia

   en.wikipedia.org/wiki/Perforated_metal

   Studies have shown that perforated metals help reduce sound levels. [4] Studies have shown that having buildings use perforated metal sheets in front of their façade can bring in one study 29% energy savings (HVAC + Lighting estimated consumption in 1 year) and in the second one 45% energy savings (heating, ventilation, air conditioning).

5. Blister pack - Wikipedia

   en.wikipedia.org/wiki/Blister_pack

   A blister pack [1] is any of several types of pre-formed plastic packaging used for small consumer goods, foods, and for pharmaceuticals. The primary component of a blister pack is a cavity or pocket made from a formable web, usually a thermoformed plastic. This usually has a backing of paperboard or a lidding seal of aluminum foil or plastic.

6. Perforated hardboard - Wikipedia

   en.wikipedia.org/wiki/Perforated_hardboard

   The holes are used to accept pegs or hooks to support various items, and perforated hardboards are therefore used for purposes such as tool boards in workshops. Peg-Board is an expired trademark used as a brand name by the Masonite Corporation , first used in 1962, [ 1 ] which is often used as a generic term for perforated storage boards made ...

7. Plastic extrusion - Wikipedia

   en.wikipedia.org/wiki/Plastic_extrusion

   A common post-extrusion process for plastic sheet stock is thermoforming, where the sheet is heated until soft (plastic), and formed via a mold into a new shape. When vacuum is used, this is often described as vacuum forming. Orientation (i.e. ability/ available density of the sheet to be drawn to the mold which can vary in depths from 1 to 36 ...