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

A kind of environment-friendly carbonless copy paper and preparation method thereof

A carbon-free copy paper, environmentally friendly technology, applied in the direction of special paper, paper, papermaking, etc., can solve the problems of product quality impact, high solid content, low formaldehyde content, etc., to achieve the reduction of free formaldehyde content, stable formaldehyde content, low The effect of formaldehyde content

Active Publication Date: 2017-12-19
GUANGDONG GUANHAO HIGH TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, more than 90% of domestic and foreign carbon-free copy paper manufacturers use melamine-formaldehyde resin as the shell wall material to produce microcapsules by in-situ polymerization, and the produced microcapsules have good strength and thermal stability. , but it contains a certain amount of formaldehyde, which is not conducive to human health and does not meet the national requirements for environmental protection.
[0004] At present, for the preparation of microcapsules with low formaldehyde content in carbon-free paper, part of the solution is to use materials that do not contain formaldehyde such as melamine as the shell material of the microcapsules. The obvious disadvantages are high cost and affected paper performance.
The method adopts melamine-formaldehyde resin as the shell wall material, and uses calcium salt as a formaldehyde scavenger to prepare low-viscosity microcapsules with low formaldehyde content and high solid content. This invention fully explains the process of using melamine and other substances to prepare microcapsules, and gives The content of free formaldehyde in the product is disclosed, but it is not stated whether the content of free formaldehyde after being produced into carbonless paper can be stably controlled
The invention patent of CN 103945929 A "Stable formaldehyde-free microcapsules" and the invention patent of CN 102958507 A "Stable formaldehyde-free microcapsules" of Fumenisher Co., Ltd. in China disclose a kind of invention patent without The preparation method of formaldehyde core-shell microcapsules, but the carbonless copy paper prepared by the above method is tested, and its pressure resistance is not ideal, which affects the quality of the product

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of environment-friendly carbonless copy paper and preparation method thereof
  • A kind of environment-friendly carbonless copy paper and preparation method thereof
  • A kind of environment-friendly carbonless copy paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Production method of blue three-stage aldehyde-removing environmentally friendly carbonless copy paper

[0025] Production of carbonless base paper: It is consistent with the known papermaking process, the main difference is that the raw materials used are all without adding any formaldehyde components or substances that may react to form formaldehyde components.

[0026] Preparation of blue microcapsules: use blue color leuco dye, dissolve in diaryl ethane type solvent oil and form leuco dye color oil. According to a certain proportion of ingredients, a small amount of wall shell materials used are shell wall materials containing formaldehyde components such as melamine formaldehyde resins known in the industry, emulsifiers and color oils, and microcapsules for carbon-free paper are prepared using known in-situ polymerization methods , after the particle size of the required microcapsules is reached in the emulsification stage, add oligomeric water-soluble chitin a...

Embodiment 2

[0034] (1) Production method of black second-stage aldehyde-removing environmentally friendly carbonless copy paper

[0035] Production of carbonless base paper: consistent with the method of Example 1.

[0036]Preparation of leuco-dye microcapsules: use a black-colored leuco-dye, dissolve it in a diaryl alkanes-type solvent oil, and form a leuco-dye color oil. The preparation method of microcapsule is consistent with example 1, and difference is: microcapsule adds chitooligosaccharide water-soluble substance and accounts for 5~8% of total dry matter supplementing as shell wall material in the forming stage of microcapsule, then in the curing stage of microcapsule again Adding 7.5-12% as a supplement to the shell wall material finally prepares black microcapsules with good mechanical strength, high stability and good stability.

[0037] Preparation of environmentally friendly carbon-free coatings: use black dye microcapsules 30-50%, modified starch 7-12%, modified corn starch...

Embodiment 3

[0044] (1) Production method of blue-colored second-stage aldehyde-removing environmentally friendly carbonless copy paper

[0045] Production of carbonless base paper: consistent with the method of Example 1.

[0046] The preparation of leuco dye microcapsules: the preparation method of leuco dye oil-soluble, microcapsules is consistent with example 1, difference is: microcapsules add chitin deacetylation modification in emulsification stage and account for 1~2% of total microcapsule dry material. 4% is used as a supplement for the shell wall material, and then 10-15% is added as a supplement for the shell wall material during the curing stage of the microcapsules, and finally blue microcapsules with good mechanical strength and good stability are prepared.

[0047] Preparation of environmentally friendly carbon-free coatings: use blue dye microcapsules 35-65%, modified starch 30-45%, styrene-butadiene latex 1-5%, sodium carboxymethyl cellulose 0.1-1.5%, potassium tripolyphos...

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 an environment-friendly carbon-free copy paper and a preparation method thereof. Copolymers such as melamine-formaldehyde resin and chitooligosaccharide water-soluble are used as wall materials, and carbon-free paper microcapsules are produced by an in-situ polymerization method to prepare a low-carbon carbon-free copy paper. Microcapsules with free formaldehyde content, and ensure that the chromogenic agent in the microcapsules is completely encapsulated, there is no free chromogenic agent, which overcomes the free formaldehyde content that must be brought in the preparation stage of the microcapsules, and at the same time in the preparation of no In the process of carbon paper, the content of free formaldehyde is also reduced, so that under the condition of effective cost, stable pressure-resistant and environmentally friendly carbon-free paper with low formaldehyde content can be produced.

Description

technical field [0001] The invention belongs to the technical field of carbonless copying papermaking, in particular to an environment-friendly carbonless copying paper with low free formaldehyde and a preparation method thereof. Background technique [0002] The principle of carbonless copy paper is that under the action of external force, the force-sensitive pigment and oil solution in the microcapsules overflow and come into contact with the color developer to cause dyeing reaction, so as to play the role of copying. It is mainly used for multi-part forms, bills, continuous Financial notes, general business financial notes, etc. have now been widely used in people's work and life. With the continuous development of carbon-free copy paper technology, people have higher and higher requirements for carbon-free paper, not only for better performance, but also for environmental protection. come higher. [0003] It is well known that the color developing agent in carbonless c...

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
Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/18D21H27/28D21H19/14D21H19/44
Inventor 黄阳旭李臻奎明红文辉陈浩梁冬梅李海涛
Owner GUANGDONG GUANHAO HIGH 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