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Process for the manufacture of environmentally friendly papers and compositions therefor

a technology of composition and paper, which is applied in the field of process for the manufacture of environmentally friendly papers and compositions therefor, can solve the problems of poor foldability, inferior paper made from pulp, and great differences in latitudinal and longitudinal tearing strength, and achieves no tearing ability, or still inferior to the paper made from pulp

Inactive Publication Date: 2005-05-12
LUNG MENG ENVIRONMENTAL FRIENDLY PAPER PROD HONG KONG HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] Yet another object of the invention is to provide a process for the manufacture of an environmental friendly paper, in which the density of the paper is reduced from about 2 g / cm3 of the combination of the raw materials to as low as about 0.5 g / cm3, saving an amount of up to 40% volume when compared with the density of pulp of about 0.7 g / cm3 to about 0.9 g / cm3.
[0006] Yet another object of the present invention is to provide a process for the manufacture of an environmental friendly paper, in which the paper posseses similar properties as those of pulp paper, such as foldability, stiffness, opaqueness, writing ability, and latitudinal and longitudinal tearing strength.
[0007] Yet another object of the present invention is to provide a process for the manufacture of an environmental friendly paper, in which neither toxic gas nor smoke is produced when the paper produced is burned because only a minor amount of high density polyethylene is burned, and the paper produced is recyclable.

Problems solved by technology

Although advantages can be found in the above papers made from polypropylene, they are still inferior to the papers made from pulp.
The drawbacks of the papers made from polypropylene include bad foldability, great differences between latitudinal and longitudinal tearing strength, or no tearing ability, etc.
Furthermore, the production cost of synthetic papers is much higher than that of pulp papers.
In view of the above drawbacks, synthetic papers do not fully comply with the needs of consumers.

Method used

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  • Process for the manufacture of environmentally friendly papers and compositions therefor
  • Process for the manufacture of environmentally friendly papers and compositions therefor
  • Process for the manufacture of environmentally friendly papers and compositions therefor

Examples

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example 1

Single-Layered Environmental Friendly Paper

[0053] A single-layered environmental friendly paper is produced from a combination of 60% by weight of inorganic mineral powders (28% by weight of calcium carbonate, 7% by weight of titanium dioxide, and 25% by weight of diatomaceous earth), 38% by weight of polyethylene (20% by weight of high density polyethylene, 10% by weight of low density polyethylene, and 8% by weight of medium density polyethylene), and 2% by weight of additives (0.8% by weight of beta-(3,4-epoxycyclohexyl)ethyltrimethoxy-silane, 0.4% by weight of N-oleyl palmitamide, and 0.8% by weight of N,N-bis(2-hydroxyethyl)stearyl amine). The combination is subjected to the steps of mixing, extruding, milling, and polymerizing, and it results in granulates. The granulates are fed into the extruder as shown in FIG. 2 and single-layered environmental friendly papers each having a thickness of 31 μm and 52 μm are produced depending on the parameters selected.

example 2

Single-Layered Environmental Friendly Paper

[0054] A single-layered environmental friendly paper is produced from a combination of 70% by weight of inorganic mineral powders (35% by weight of calcium carbonate, 6% by weight of titanium dioxide, 24% by weight of diatomaceous earth, and 5% by weight of clay), 28% by weight of polyethylene (200%0 by weight of high density polyethylene, and 8% by weight of medium density polyethylene), and 2% by weight of additives (0.8% by weight of beta-(3,4-epoxycyclohexyl)ethyltrimethoxy-silane, 0.4% by weight of N-oleyl palmitamide, and 0.8% by weight of N,N-bis(2-hydroxyethyl)stearyl amine). The combination is subjected to the steps of mixing, extruding, milling, and polymerizing and results in granulates. The granulates are fed into the extruder as shown in FIG. 2, and single-layered environmental friendly papers each having a thickness of 73 μm and 82 μm are produced depending on the parameters selected.

example 3

Single-Layered Environmental Friendly Paper

[0055] A single-layered environmental friendly paper is produced from a combination of 80% by weight of inorganic mineral powders (35% by weight of calcium carbonate, 5% by weight of titanium dioxide, 35% by weight of diatomaceous earth, and 5% by weight of talc), 18% by weight of polyethylene (high density polyethylene), and 2% by weight of additives (0.8% by weight of beta-(3,4-epoxycyclohexyl)ethyltrimethoxy-silane, 0.4% by weight of N-oleyl palmitamide, and 0.8% by weight of N,N-bis(2-hydroxyethyl)stearyl amine). The above combination is subjected to the steps of mixing, extruding, milling, and polymerizing and results in granulates. The granulates are fed into the extruder as shown in FIG. 2 and single-layered environmental friendly papers each having a thickness of 102 μm and 116 μm are produced depending on the parameters selected.

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Abstract

A process for the manufacture of an environmental friendly paper from about 56% to about 80% by weight of inorganic mineral powders, about 43% to 18% by weight of polyethylene, and about 1% to 2% by weight of additives is disclosed. A composition for the manufacture of an environmental friendly paper, comprising about 56% to 80% by weight of inorganic mineral powders, about 43% to 18% by weight of polyethylene, and about 1% to 2% weight by additives is also disclosed.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a process for the manufacture of an environmental friendly paper having up to about 80% by weight of inorganic mineral powders. More particularly, the present invention relates to a process for the manufacture of a paper having two dimensional strength by using a combination of at least of one extruder and a forming mould having an ∘-shaped gate. The present invention also relates to a composition for the manufacture of an environmental friendly paper comprising up to about 80% weight of inorganic mineral powders. BACKGROUND OF THE INVENTION [0002] Numerous synthetic papers have been developed. Papers of single and multiple layers having polypropylene as a main component and inorganic mineral powders as fillers are produced from formulations of conventional plastic films. Papers are coextruded as a single layer or multiple layers during the process, and are formed as a sheet through a forming mould having a direct-line g...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B29C48/10B29C48/32B29C55/16B29C55/26B29C55/28B29L7/00C08K3/00C08K5/00C08L23/04C08L23/06
CPCB29K2711/12B29C47/065B29C47/0026B29C47/0057B29C47/0059B29C47/0066B29C47/02B29K2023/06B29C47/20B29K2105/16B29C55/16B29C55/26B29C55/28B29L2009/00C08K3/00C08K5/00C08L23/04C08L23/06B29C2793/0063B29C47/0021B29C47/00B29C48/15B29C48/00B29C48/08B29C48/10B29C48/0018B29C48/0019B29C48/0022B29C48/21B29C48/32B29C48/338
Inventor LIANG, SHIH HUEI
Owner LUNG MENG ENVIRONMENTAL FRIENDLY PAPER PROD HONG KONG HLDG
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