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Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same

A hydrophobic, paper-based technology used in coatings, pigmented coatings, papermaking, etc., that can solve problems such as loss of structural integrity, wet cups, etc.

Inactive Publication Date: 2018-02-16
GRAPHIC PACKAGING INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Moisture from such moisture-laden food and beverage products can penetrate the cardboard forming the cup, causing the cup to become soggy and lose its structural integrity

Method used

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  • Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same
  • Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same
  • Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same

Examples

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Embodiment

[0109] Coated paper substrates (eg, 12 or 24 point thickness and 257 or 165 basis weight paperboard) were formed as follows: The control (C) sample was a commercially available 24 point coated paperboard with 12-16 lb / 3msf coat weight of conventional pigmented coatings designed for paper substrates used in lithographic and flexographic printing. Samples S-1 and S-2 used a commercially available 14 point uncoated cup with a size press layer containing starch size. The uncoated cups were coated with a hydrophobic coating formulation (shown in Table 1 below) using a wire wound rod and then dried in a forced air oven at a temperature of 110°C for 2 minutes. The resulting hydrophobic pigment coating (HPC) layer had a coating weight of 10 lb / 3 msf. Moisture barrier coatings were then also applied to these HPC layers using wire wound rods from a commercially available polyethylene terephthalate (PET) emulsion coating (Sustainable Fiber Solutions, SFS Coating 230HS). Samples S-3 an...

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Abstract

A hydrophobic coated paper substrate formed from a paper substrate of paper fibers and internal sizing agent, a surface size layer of one or more surface sizing starches, optionally one or more non-starch hydrophobic surface sizing agents, and optionally one or more paper pigments, on at least one surface of the paper substrate, and at least one hydrophobic pigmented coating layer of a paper pigment component and a hydrophobic pigment binder component on at least one surface size layer. Also a method for preparing such coated paper substrates.

Description

technical field [0001] The present invention generally relates to hydrophobic coated paper substrates suitable for use in aqueous polymer emulsion topcoats to form moisture barrier coatings and which are repulpable / recyclable for better suitability on paper machines. The present invention also generally relates to methods of making such hydrophobic coated paper substrates. Background technique [0002] Paper substrates have been used as disposable, single-use containers, packaging, etc. for various food and beverage products. For example, paperboard in the form of paper cupboard may be used to provide disposable single-use cups for a variety of beverage products. These disposable, single use cups can be used for "hot" beverages such as coffee, latte, mocha, hot chocolate, etc., and for "cold" beverages such as soft drinks, milk, smoothies, milkshakes, etc. Packaging such as these disposable, single use cups can also be used as containers for other moisture containing foods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/82D21H19/84D21H19/14D21H19/36
CPCD21H19/14D21H19/36D21H19/828D21H19/84D21H27/10D21H17/62D21H19/40D21H19/48D21H19/54D21H19/822D21H21/16D21H19/80D21H19/12
Inventor 迈克尔·F·凯尼格戴维·V·里德
Owner GRAPHIC PACKAGING INT
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