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  2. Perforation - Wikipedia

    en.wikipedia.org/wiki/Perforation

    The big advantage of laser perforation is the consistency of the hole size, compared to mechanical perforation. This is very important in modified atmosphere packaging for fresh produce. The laser perforation is often carried out on roll slitting machines (slitter rewinder) as the printed material is slit down to the finished roll size.

  3. Milk bag - Wikipedia

    en.wikipedia.org/wiki/Milk_bag

    A milk bag is a flexible plastic pouch used to package milk and is used in some areas instead of a hardened milk jug, or as an alternative to it. Usually one of the corners is cut off to allow for pouring, and the bag is stored in a pitcher .

  4. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    For the US letter paper size (8 + 1 ⁄ 2 by 11 inches, 220 by 280 mm), a three-hole standard is widely used. The holes are positioned symmetrically, with the centers 4 + 1 ⁄ 4 inches (108 mm) apart. It requires paper formats that are at least 9 + 1 ⁄ 2 inches (241 mm) high.

  5. Plastic shopping bag - Wikipedia

    en.wikipedia.org/wiki/Plastic_shopping_bag

    Due to their durability, plastic bags can take centuries to decompose. [22] According to The Outline, it can take between 500 - 1,000 years for a plastic shopping bag to break down. The use lifespan of a bag is approximately 12 minutes of use. [23] On land, plastic bags are one of the most prevalent types of litter in inhabited areas.

  6. Comb binding - Wikipedia

    en.wikipedia.org/wiki/Comb_binding

    Comb binding (sometimes referred to as "cerlox" or "surelox" binding) is one of many ways to bind pages together into a book. This method uses round plastic spines with 19 rings (for US Letter size) or 21 rings (for A4 size) and a hole puncher that makes rectangular holes.

  7. Plastic bag - Wikipedia

    en.wikipedia.org/wiki/Plastic_bag

    A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile. Plastic bags are used for containing and transporting goods such as foods, produce, powders , ice, magazines , chemicals , and waste .

  8. Design of plastic components - Wikipedia

    en.wikipedia.org/wiki/Design_of_plastic_components

    Holes can be possibly made on slides but can result in generation of weld lines. Minimum spacing between 2 holes or a hole and a sidewall should be equal to the diameter of the hole. The hole should be located at a minimum distance of 3 times the diameter from the edge of a part, to minimize stresses.

  9. Punching - Wikipedia

    en.wikipedia.org/wiki/Punching

    No pilot hole was used on the left. Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal, paper, vulcanized fibre and some forms of plastic sheet.