Composite material

Details Composite material Composite material

D - Textiles, Paper

21

H

9/46

D21H 17/20 (2006.01) D21H 13/36 (2006.01) D21H 17/34 (2006.01) D21H 21/52 (2006.01)

Patent

CA 1113661

COMPOSITE MATERIAL. Abstract. A composite material in semi-finished or finished form. Semi-finished material comprises cellulose fiber struc- ture, and evenly distributed throughout said structure, a polymer material being constituted by solid discrete part- icles or fibers having polymer at least at their surfaces, the polymer being a water-insoluble solid synthetic polymer which is film-forming at temperatures above 80°C, said particles or fibers of polymer material being bound in the composite mate- rial by means of a polyelectrolyte, and optionally inorganic particles or fibers of minerals or metals, including hydraulic binders. In finished form, film-forming properties of polymer have been elicited by application of energy. Finished products may be soft, elastic or hard materials or shaped articles. Process for preparing the material comprises co-flocculating polymer material and optionally inorganic material with cellu- lose fiber pulp by means of polyelectrolyte, and de-watering resulting suspension on a paper making machine. Finished product is obtained from semi-finished product by application of heat and usually pressure. S 1

292361

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