Preparation method for soft porous synthetic paper

A synthetic paper, soft technology, applied in the field of soft synthetic paper preparation, can solve the problems of hard hand feeling, high production energy consumption, slow ink penetration, etc., to improve penetration and absorption speed, reduce production costs, fast ink penetration Effect

Inactive Publication Date: 2012-07-25
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although synthetic paper is more environmentally friendly in the entire production process, the polymer materials used (mainly polyolefins, such as polyethylene, polypropylene, polyvinyl chloride, etc.) need to be produced under high temperature conditions (usually at 180°C). Secondary processing, therefore higher energy consumption
In addition, in order to increase the ink absorption performance of synthetic paper, a large amount of inorganic filler-calcium carbonate powder is used in synthetic paper, and at the same time, extrusion film-forming technology is used to make the overall structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] Weigh 2.2 kilograms of isophorone diisocyanate, 160 kilograms of polycaprolactone diol (molecular weight 8000), and 100 kilograms of dimethylformamide into the reactor, react at 80°C for 3 hours, and then add 1 3.8 kg of 3'-propylene glycol and 13.3 kg of isophorone diisocyanate were reacted at 80°C for 2 hours to obtain a viscous polyurethane solution; the prepared polyurethane solution was cooled to 25°C, and 318.4 kg of dimethyl was added Base formamide is formulated into a solution with a polyurethane solid mass content of 30%, then 147 kg of light calcium carbonate is added, and stirred for 1 hour to obtain a mixed solution; 80% of the total obtained mixed solution is coated on release paper, And sent to the oven for drying (the oven temperature is 70 ℃), after the film on the release paper is completely dried, the substrate for synthetic paper production is obtained; the remaining mixed solution is coated on the synthetic paper with a certain thic...

Example Embodiment

[0024] Example 2:

[0025] Weigh 2.6 kilograms of 4,4-dicyclohexylmethane diisocyanate, 400 kilograms of polybutylene adipate glycol (molecular weight 20,000), and 300 kilograms of dimethylacetamide into the reactor at 80°C After reacting for 3 hours, 5.9 kg of 1,6'-hexanediol and 15.7 kg of 4,4-dicyclohexylmethane diisocyanate were added. The reaction was continued at 80°C for 2 hours to obtain a viscous polyurethane solution; then the prepared The polyurethane solution was cooled to 20°C, and 689.8 kg of dimethylacetamide was added to prepare a solution with a polyurethane solid content of 30%, then 787.8 kg of heavy calcium carbonate was added, and stirred for 1 hour to obtain a mixed solution; 70% of the total mixed solution is coated on release paper and sent to an oven for drying (the oven temperature is 110°C). After the film on the release paper is completely dried, the base for synthetic paper production is obtained. Finally, the remaining mixed solution is coated on th...

Example Embodiment

[0027] Example 3:

[0028] Weigh 2.6 kilograms of 4,4-dicyclohexylmethane diisocyanate, 300 kilograms of polyethylene adipate diol (molecular weight 15000), and 200 kilograms of dimethylacetamide into the reactor at 80°C After reacting for 3 hours, add 4.5 kg of 1,4'-butanediol and 13.3 kg of isophorone diisocyanate and continue to react at 80°C for 2 hours to obtain a viscous polyurethane solution; then, the prepared polyurethane solution is cooled to 22℃, and 547.6 kg of dimethylformamide was added to prepare a solution with a polyurethane solid content of 30%, and 480.6 kg of colloidal calcium carbonate was added, and stirred for 1 hour to obtain a mixed solution; then the total amount of the obtained mixed solution 80% of the release paper is coated on the release paper and sent to the oven for drying (the oven temperature is 90℃). After the film on the release paper is completely dried, the base material for synthetic paper production is obtained; The remaining mixed soluti...

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PUM

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Abstract

The invention discloses a preparation method for soft porous synthetic paper, which mainly includes the steps: proportionally adding diisocyanate, polyester dihydric alcohol, solvent and chain extender into a reactor to undergo a heating reaction so as to obtain thick polyurethane solution; adding a certain amount of solvent to prepare polyurethane solution after cooling, and adding a certain amount of inorganic filler with uniformly stirring and mixing so that mixed solution is obtained; spreading partial mixed solution on release paper, placing the release paper into a dryer for drying, andobtaining a base material for producing the synthetic paper after a film on the release paper is completely dried; and spreading the rest mixed solution on the base material, then immersing the base material into water solution, immediately placing completely solidified mixed solution on the surface into the dryer for forced air drying, stripping the film on the release paper after the film on the release paper is completely dried, and the film is the soft synthetic paper product. The method is low in production energy consumption, and the prepared synthetic paper is porous, soft, quick in ink penetration and easy in drying.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite material production, and in particular relates to a method for preparing porous soft synthetic paper. Background technique [0002] Synthetic paper, also known as the second generation paper. It is a multifunctional composite material with the characteristics of plastic and paper, which is processed by extrusion process with polymer resin and inorganic filler as the main raw materials. Synthetic paper is a new type of plastic material product, which has the characteristics of light specific gravity, high strength, tear resistance, good printability, shading, UV resistance, and durability. The production process of synthetic paper has less pollution, which is a major reform of modern paper production. Synthetic paper has the same writing and printing effects as plant fiber paper. At the same time, it has the core properties of plastic packaging, such as waterproof, moisture-...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32C08K3/26C08J9/00
Inventor 李筱芳周虎于贤勇曾坚贤张蛟蛟蒋敏
Owner HUNAN UNIV OF SCI & TECH
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