섬유

liant de lessive sulfitee a base d'ammonium utilise dans la fabrication des panneaux gaufres (ammonium based spent sulfite liquor as binder for panel products), / reprint: liant de lessive sulfitee a base d'ammonium utilise dans la fabrication des panneau

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 320
the document explains that: ammonium based spent sulfite liquor from softwoods or hardwoods can be used without chemical modification as a thermosetting binder for making waferboard. a binder content of 4 percent is sufficient to produce poplar waferboard which will meet the requirements set by the canadian standards association (can 3-0188.2-m78). the binder can be applied to the wafers in either liquid or powder form. since its curing rate is slower than that of the conventional phenolic resin, a higher temperature or a post-heat treatment is required to cure this binder completely during board making. nonetheless, the economic advantage of this binder system is enormous because it is a waste product from pulping and can be obtained at a very competitive price
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