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Packaging material having moisture barrier and methods for preparing same

A packaging material, barrier layer technology, applied in the field of recyclable packaging materials, which can solve the problems of curling, jamming, and difficulty feeding into copiers or printing machines

Inactive Publication Date: 2016-01-06
INT PAPER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This moisture (humidity) can cause the packaged paper to curl, making it difficult to feed or jam in a copier or printing press

Method used

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  • Packaging material having moisture barrier and methods for preparing same
  • Packaging material having moisture barrier and methods for preparing same
  • Packaging material having moisture barrier and methods for preparing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0105] Also described herein are various embodiments of the method of making the (recyclable) packaging material of the present invention according to embodiments of the present invention. One embodiment of a method of making a recyclable packaging material comprises the steps of: (a) providing a printable material comprising: a paper substrate comprising at least about 40% recycled paper fibers and having an outer surface and an inner surface; A print-receiving layer with an inner surface and a calendered outer surface, wherein the inner print-receiving layer surface is disposed on, is located on, an outer surface of a paper substrate, and the outer surface of the calendered print-receiving layer has a Parker print smoothness value of about 1.5 or more Low; (b) applying an energy-curable coating comprising one or more energy-curable monomers to a calendered print-receiving layer outer surface (e.g., the entire print-receiving layer outer surface), the outer surface including a...

Embodiment

[0125] One embodiment of making a returnable ream wrapper is described below:

[0126] Use a paper substrate that contains 25-75% softwood fibers and 25-75% hardwood fibers. The paper substrate has a basis weight of 45-75 lbs / 3300 sq. ft. and a paper thickness of 3-4 mils.

[0127] A surface paper sizing comprising paper sizing starch is optionally applied to one or both sides of the paper substrate using a size press. Each size coat formed provides a coat weight of 1-3 gsm.

[0128] The print receiving layer was prepared from the following ingredients:

[0129] Table 1: Pigments

[0130] Pigment type

product name

number of copies

clay

Astracote

85

calcium carbonate

Covercarb HP

15

[0131] Table 2: Other Ingredients

[0132] Types of

product name

number of copies

starch

Ethylex 2040

1

latex

Dow 30985.50

25

crosslinking agent

Sequarez 765

0.035

vi...

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PUM

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Abstract

The invention provides an article in the form of recyclable packaging material having a water vapor transportation rate of about 500 g / m2 / day or less. The packaging material has a paper substrate of recyclable paper fibers and a print-receptive layer which is positioned over the outer surface of the paper substrate. The packaging material also has a moisture barrier layer positioned over the print-receptive layer. The moisture barrier layer is formed from one or more energy-cured polymers. Also, the invention provides methods for preparing these packaging materials, including printed packaging materials.

Description

[0001] This application is a Chinese invention patent application for which the applicant is "International Paper Company", the application date is November 07, 2011, the application number is "201180053269.0", and the invention name is "packaging material with moisture barrier layer and its preparation method" divisional application. technical field [0002] The present invention broadly relates to a returnable packaging material comprising a paper substrate, a print-receiving layer on an outer surface of the paper substrate, and a print-receiving layer comprising one or more energy-curable polymers on the print-receiving layer. Moisture barrier. The present invention also broadly relates to a method of making these returnable packaging materials by applying to a calendered print-receiving layer comprising one or more energy-curable monomers and allowing the energy-curable monomers Curing to form a moisture barrier layer comprising one or more energy cured polymers on the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/16D21H19/80D21H19/82D21H27/10D21H19/84
CPCD21H19/84B32B3/10B32B5/02B32B27/10D21H19/44D21H19/54D21H19/82D21H21/16D21H27/10Y10T428/24851Y10T428/266Y10T428/277Y10T428/31511Y10T428/31551Y10T428/31786Y10T428/31935Y10T428/31993
Inventor D·W·安德森P·L·尤因T·J·布拉德福德M·J·墨菲
Owner INT PAPER CO
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