Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF4 Cites 21 Cited by
  • 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 of synthetic paper relatively dense, which makes the synthetic paper produced Paper products have problems such as hard hand feeling, slow ink penetration, and long drying time of ink, etc.
Therefore, after printing, the current synthetic paper products have slow ink absorption, and most of them need drying and other operations, which limits their application scope to a certain extent.
From the above analysis, it can be seen that the current synthetic paper products mainly have disadvantages such as high production energy consumption, compact overall structure, hard hand feeling, and slow ink absorption.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 2.2 kg of isophorone diisocyanate, 160 kg of polycaprolactone diol (molecular weight: 8000), and 100 kg of dimethylformamide into the reactor, react at 80°C for 3 hours, and then add 1 , 3.8 kg of 3'-propylene glycol, 13.3 kg of isophorone diisocyanate continued to react 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 Phenyl formamide is mixed with the solution that polyurethane solid mass content is 30%, then adds 147 kilograms of light calcium carbonate, stirs 1 hour to obtain mixed solution; 80% of the mixed solution total amount of gained is coated on release paper, And send it into the oven for drying (the oven temperature is 70°C). 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 thickness. Substrates for paper production (t...

Embodiment 2

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

Embodiment 3

[0028] Weigh 2.6 kg of 4,4-dicyclohexylmethane diisocyanate, 300 kg of polyethylene adipate diol (molecular weight 15,000), and 200 kg of dimethylacetamide into the reactor, React for 3 hours, then add 4.5 kg of 1,4'-butanediol, 13.3 kg of isophorone diisocyanate and continue to react for 2 hours at 80°C to obtain a viscous polyurethane solution; then cool the prepared polyurethane solution to 22 ℃, and add 547.6 kilograms of dimethylformamide and be mixed with the solution that polyurethane solid mass content is 30%, then add 480.6 kilograms of colloidal calcium carbonate, stir 1 hour to obtain mixed solution; Then the total amount of mixed solution obtained 80% of the release paper is coated on the release paper and sent to the oven for drying (the oven temperature is 90°C). After the film on the release paper is completely dried, the substrate for synthetic paper production is obtained; finally, the Coat the remaining mixed solution with a certain thickness on the base mate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com