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  2. Binder clip - Wikipedia

    en.wikipedia.org/wiki/Binder_clip

    A binder clip is a strip of spring steel bent into the shape of an isosceles triangle with loops at the apex. Tension along the base of the triangle forces the two sides closed, and the loops prevent the sharp steel edges from cutting into the paper. The loops also serve to hold two pieces of stiff wire, which are used as handles and allow the ...

  3. Comb binding - Wikipedia

    en.wikipedia.org/wiki/Comb_binding

    2". 51 mm. 425. 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. Comb binding is sometimes referred to as plastic comb ...

  4. Polyethylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polyethylene_terephthalate

    Polyethylene terephthalate (or poly (ethylene terephthalate), PET, PETE, or the obsolete PETP or PET-P ), is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, and thermoforming for manufacturing, and in combination with glass fibre for engineering resins. [5]

  5. Polyvinylidene fluoride - Wikipedia

    en.wikipedia.org/wiki/Polyvinylidene_fluoride

    Polyvinylidene fluoride or polyvinylidene difluoride ( PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Its chemical formula is (C 2 H 2 F 2) n . PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons.

  6. Rubber band - Wikipedia

    en.wikipedia.org/wiki/Rubber_band

    A rubber band (also known as an elastic band, gum band or lacky band) is a loop of rubber, usually ring or oval shaped, and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845, by Stephen Perry. [1] [2] [3] Most rubber bands are manufactured out of natural rubber as well as for latex free ...

  7. Mechanical pencil - Wikipedia

    en.wikipedia.org/wiki/Mechanical_pencil

    A typical construction of a ratchet -based mechanical pencil. A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈlɛd /. The lead, often made of graphite, is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use.

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