Upm-kymmene Corporation

Upm Specialty Papers Oy

Janne Antila

Harri Kosonen

Mikko Rissanen

Kuisma Littunen

Jaakko Rautalahti

Jukka Kotilainen

Jari Tamminen

Jussi Leinonen

The invention relates to a method for manufacturing thermoplastic poly(vinyl alcohol) derivative in a melt state reaction and a product thereof, wherein the method thermoplastic poly(vinyl alcohol) that has been dried is heated and admixed with an organic acid anhydride that has a catenated carbon structure which ends into a vinyl group, such that a mixture is obtained which is above the melting point of the mixture, thereby causing an ester bond forming condensation reaction in a melt state, wherein at least some of the organic acid anhydride reacts with hydroxyl groups of the thermoplastic poly(vinyl alcohol), such that reaction product is formed which contains carboxylic acid residue and thermoplastic poly(vinyl alcohol) derivative which contains ester bonded pendant chains of which at least some end into vinyl groups. The invention further relates to a method for manufacturing a paper substrate and a product thereof, which contains a primer layer that contains the reaction product.

Method for manufacturing thermoplastic poly(vinyl alcohol) derivative in a melt state reaction and products thereof

The invention relates to a method for manufacturing a paper substrate suitable for binding silicone in a catalytic hydrosilation reaction and products thereof, wherein the molecular weight of polyvinyl alcohol is used to control the viscosity of the water-based acetalization reaction, such that a paper substrate may be coated with acetalized polyvinyl alcohol that contains high amount of functional vinyl groups, wherein the functional vinyl groups are part of catenated carbon structures which contain at least 4 carbon atoms and which have an acetal connectivity with the backbone chain of the acetalized polyvinyl alcohol.

Paper substrate comprising modified low molecular weight PVA with functional vinyl groups

The invention relates to manufacturing low weight high quality paper suitable for use as a support layer of a release liner. A paper web is formed from pulp slurry, the moisture content of the paper web is reduced by a press section (PSEC), the paper web is supported by a belt (BELT) from a first contact point (CP) in the press section (PSEC) to a first separation point (SP) in a drying section (DSEC), and the paper web is dried to form paper. The temperature profile of the paper web may be non-decreasing. When supported, the temperature of the paper web of the paper web may be higher than or equal to 56&#xb0; C. to obtain a paper web having a dry content of at least 40 wt.-% at the first separation point.

Process to manufacture low weight high quality paper for use as a support layer of a release liner with a belt assembly

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Hämeenlinna, Finland

Janne Antila