Other

Raisio Chemicals Oy

Kimmo Santam&auml;ki

Kari Nurmi

Tapani Penttinen

Yrj&ouml; Aho

Tom Carne

Kari Yrj&ouml;l&auml;

Tomi Kimpim&auml;ki

The present invention relates to method of forming a transparent and gas-permeability decreasing coating by virtue of applying a coating containing at least one polymer dispersion on a sheet of paper, board or similar cellulosic fiber based web in at least one coating step. The method according to the invention is based on the use of a polymer dispersion containing extremely pure talc particles having a degree of purity of 90-100% and a particle size of 90% smaller than 40 &mgr;m.

Method of forming a transparent and gas-permeability decreasing coating to a paper or board web and a coating formulation for the method

The invention relates to coated board, a process for its manufacture, and containers and packaging formed therefrom. The board comprises at least one polymer-based coat preventing the transmission of liquids and gases, which coat is according to the invention made from a polymer dispersion to which talc particles are added so that talc will constitute 30-80% of the dry weight of the dried coat. The coating is applied onto the board during its manufacture as on-line coating. The board may be, for example, a multi-layer board ( ) which has a middle layer ( ) containing CTMP or other similar mechanical pulp, on its both sides outer layers ( ) formed from sulfate pulp, against these on both sides of the board ( ) talc-containing polymeric barrier layers ( ), and on one side of the board a heat sealing layer ( ) introduced onto the barrier layer ( ).

Coated board, a process for its manufacture, and containers and packaging formed therefrom

Growing community of inventors

Raisio, Finland

Kimmo Santamäki

Growing community of inventors

Raisio, Finland

Kimmo Santam&auml;ki

Kimmo Santamäki