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  2. Polymer-bonded explosive - Wikipedia

    en.wikipedia.org/wiki/Polymer-bonded_explosive

    Polymer-bonded explosive. Polymer-bonded explosives, also called PBX or plastic-bonded explosives, are explosive materials in which explosive powder is bound together in a matrix using small quantities (typically 5–10% by weight) of a synthetic polymer. PBXs are normally used for explosive materials that are not easily melted into a casting ...

  3. Polyvinyl butyral - Wikipedia

    en.wikipedia.org/wiki/Polyvinyl_butyral

    Polyvinyl butyral (or PVB) is a resin mostly used for applications that require strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility. It is prepared from polyvinyl alcohol by reaction with butyraldehyde. The major application is laminated safety glass for automobile windshields. [ 1]

  4. Filler (materials) - Wikipedia

    en.wikipedia.org/wiki/Filler_(materials)

    Plastic consumption uses by field. Filler materials are particles added to resin or binders ( plastics, composites, concrete) that can improve specific properties, make the product cheaper, or a mixture of both. [1] The two largest segments for filler material use is elastomers and plastics. [2] Worldwide, more than 53 million tons of fillers ...

  5. Porphyrin - Wikipedia

    en.wikipedia.org/wiki/Porphyrin

    Porphyrin. Porphine, the parent porphyrin. Porphyrins ( / ˈpɔːrfərɪn / POR-fər-in) are a group of heterocyclic, macrocyclic, organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges ( =CH− ). In vertebrates, an essential member of the porphyrin group is heme, which is a ...

  6. Trapper Keeper - Wikipedia

    en.wikipedia.org/wiki/Trapper_Keeper

    A Pink Five Star Trapper Keeper. Trapper Keeper is a brand of loose-leaf binder created by Mead.Popular with students in the United States and parts of Latin America from the 1970s to the 1990s, it featured sliding plastic rings (instead of standard snap-closed metal binder rings), folders, and pockets to keep schoolwork and papers, and a wrap-around flap with a Velcro closure (originally a ...

  7. Punched pocket - Wikipedia

    en.wikipedia.org/wiki/Punched_pocket

    An open file which can be used with punched pockets. A punched pocket can contain only a small number of paper sheets. Often there is only one sheet per pocket. Sometimes a punched pocket contains two sheets, each with one-sided text outward. One can see attached punched pockets, each containing a page with some information, in some banks, post ...

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