비의류제품

herstellung von gipsfaserplatten auf altpapierbasis mit hohen festigkeiten. abschlussbericht. (production of high-strength staff plates based on waste paper. final report)

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 525
waste paper is dry-ground in the refiner and wetted with water in a mixer. the quantity of water suffices to bind the gypsum which is added later, yet is small enough to avoid that excess water escapes the plate as it is pressed. the addition of starch dissolved in the mixing water improves the homogeneity and the mechanical properties of plates. higher fiber contents also improve the mechanical properties but decreases the fire resistance of plates. gross weights of ca. 1.2 g/cm (3) may provide flexural strengths above 20 n/mm (2) . the fine grain of flue gas desulfurization gypsum, gypsum from brown-coal-fired furnaces inclusive, gives plates with excellent mechanical properties. plate surface treatments with k sub 2 co sub 3 effect an additional improvement in the mechanical properties (orig.). (available from tib hannover: rn 5905(2348).) (copyright (c) 1992 by fiz. citation no. 92:002823.)
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