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Ethylene copolymers

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  • Ethylene can be copolymerized with a number of other compounds. Ethylene-vinyl acetate copolymer (EVA)for instance, is produced by the copolymerization of ethylene and vinyl acetate under pressure, using free-radical catalysts.  Many different grades are manufactured, with the vinyl acetate content varying from 5 to 50 percent by weight.
  • Ethylene-acrylic acid and ethylene-methacrylic acid copolymers are prepared by suspension or emulsion polymerization, using free-radical catalysts. Due to their mechanical cohesion and adhesive properties, ethylene copolymers and terpolymers are widely used in manufacturing hot-melts.
  • With a very broad range of copolymer content resulting in versatile balance of adhesion/ cohesion properties and a variety of moleculecular weight directly linked to viscosity and rehological behavior, ethylene copolymers are leading technology for hot-melts formulation.
  • Formulators can adjust their formulation to fullfil technical requirements of many applications requiring long or short open time, resistance to elevated or cold temperatures and many other performances.
  • Ethylene Copolymer based hot-melt are widely used in packaging, for various applications including cartons and folding boxes, deep-freeze packages or bottle labelling. Thermo adhesive film based on ethylene copolymers are widely used for automotive interior trim applications.
  • Ethylene Copolymer based hot-melts are widely used in bookbinding, depending on application these formulas will be pigmented (white). In woodworking Ethylene copolymer based hot- melts are widely used in applications such as edge banding and veneering.
  • Even if Styrene Block Copolymers (SBCs) are the most common polymer base to formulate pressure sensitive hot-melts, Ethylene Copolymers can also be a good choice, being able to match highly demanding technical requirements both for some diapers applications or fem care products.
  • In textile applications, Ethylene - Acrylic esters - Maleic Anhydride or Etylene - Vinyl Acetate - Maleic Anhydride based thermo reactivable films are a very efficient way to bond various substrates using continuous or discontinuous processes including several reactivation technologies like calandering or infra-red.
  • DuPont announced that it is investing approximately $150 million to expand and upgrade manufacturing facilities in Europe, the United States and Asia to meet strong demand for its specialty ethylene copolymers in photovoltaics, packaging and automotive markets, as well as for new infrastructure in emerging economies.
  • Dupont confirms European price increases for ethylene copolymer resins.

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