International Paper Company

Leroy C Hofmann

Jasper H Field

Robert W Hicks

Stephen H Monroe

Alexander Sadle

James A Lock

Chester P Kulesza

A method and apparatus for producing a paper product having a surface with enhanced gloss. The method includes the following steps: applying a continuous layer of an impressionable coating material to a paper product; contacting the layer of coating material with a polymer release film having a smooth and glossy surface substantially free of defects, the surface having non-adhering and release characteristics; and solidifying the coating material during contact with the release film. Using this technique, a smooth and glossy surface of the release film is substantially imparted to a surface of the layer of solidified coating material. In the case of clay-coated substrates, the coating is solidified by heating, whereas in the case of polyethylene-coated substrates, the coating is solidified by cooling. The end product is a coated substrate in which the coating has a glossy surface to which the texture of a film has been imparted.

Apparatus for making paper and paperboard having enhanced gloss

A method and apparatus for producing a paper product having a surface with enhanced gloss. The method includes the following steps: Applying a continuous layer of an impressionable coating material to a paper product; contacting the layer of coating material with a polymer release film having a smooth and glossy surface substantially free of defects, the surface having non-adhering and release characteristics; and solidifying the coating material during contact with the release film. Using this technique, a smooth and glossy surface of the release film is substantially imparted to a surface of the layer of solidified coating material. In the case of clay-coated substrates, the coating is solidified by heating, whereas in the case of polyethylene-coated substrates, the coating is solidified by cooling. The end product is a coated substrate in which the coating has a glossy surface to which the texture of a film has been imparted.

Method for producing paper products having increased gloss in which

An aqueous acidic adhesive composition is described comprising starch, polyvinylacetate, a copolymer of vinylacetate and ethylene and, optionally, a water-resistant thermosetting resin such as urea-formaldehyde or melamine-formaldehyde. The adhesive is particularly useful as a corrugator adhesive in the preparation of corrugated paperboard which requires a high wet bond strength. Because of its excellent 'green bond' characteristics, the corrugators can be run at high speeds to produce a product having acceptable wet bond strengths with the important additional advantages that the bond is strong, tough and flexible.

Acid type starch adhesive composition

An efficient, inexpensive, in-line process is provided for producing additive-impregnated corrugated board, such as those having excellent rigid-when-wet and rigid-when-humid strengths. The process comprises applying an additive, such as water- and moisture-resistant resin, flame retardant, fire proofing agent, fungicide, mold-inhibitor, insecticide, or the like, in the form of a collapsible foam of a dispersion or solution of the additive to the corrugated medium, and desirably the liners, at the time the corrugated board is being formed.

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Saddle River, NJ, United States of America

Leroy C Hofmann