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Preparation method of erasable neutral ink

A technology of neutral ink and preparation steps, which is applied in ink, household utensils, applications, etc., can solve problems such as poor rheological properties, unsafe environmental protection, and low thixotropy, and achieve good fluidity, unique and novel methods, and stability Good results

Inactive Publication Date: 2016-06-15
张静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the technical problems mainly solved by the present invention: aiming at the currently commonly used erasable neutral ink, polymer rubber-like substances are used to wrap dyes or pigments to volatilize the solvent, and the rubber-like substances form a film to support the writing interface, and also use volatile organic solvents, Leading to the current situation of unsafe and environmentally friendly production and use, low thixotropy, poor rheological properties and poor stability, a method of extracting vitamin C from orange peel and coating it with gelatin and gum arabic to make microcapsules, using indoxyl as Ink dyes, supplemented with surfactants, thickening rheological agents, etc. to improve the stability and rheological properties of ink, so as to obtain the preparation method of erasable neutral ink

Method used

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Examples

Experimental program
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Effect test

example 1

[0023] First weigh 400g of orange peel, wash it with deionized water, dry it under the hot sun, crush it with a jet mill, soak it in 1L of petroleum ether for degreasing for 1 hour, and then add the degreased orange peel to the other after distilling and recovering petroleum ether. In anhydrous ethanol with twice the volume, ultrasonically extract at 50°C for 1 hour with 100W power; after ultrasonic extraction, transfer the absolute ethanol extract into a rotary evaporator, heat up to 55°C, and remove residual absolute ethanol by rotary evaporation , dried in a vacuum freeze dryer, pulverized and passed through a 200-mesh standard sieve to obtain orange peel vitamin C powder; then weigh 5g of gelatin and an equal mass of gum arabic, add it to 200mL of distilled water, and stir in a water bath at 35°C to make the two Fully dissolve, then add 15g of orange peel vitamin C powder, mix evenly, move into a high-pressure emulsifying shear homogenizer, and emulsify and shear at a shear...

example 2

[0026]First, weigh 450g of orange peel, wash it with deionized water, dry it under the hot sun, crush it with a jet mill, immerse it in 1.5L of petroleum ether and degrease it for 1.5h, distill and recover the petroleum ether, and then remove the degreased orange peel Add 2.5 times the volume of absolute ethanol, and use 150W power to ultrasonically extract at 55°C for 1.5h; Dehydrated ethanol, dried by a vacuum freeze dryer, crushed and passed through a 200-mesh standard sieve to obtain orange peel vitamin C powder; then weigh 8g of gelatin and an equal mass of gum arabic, add it to 250mL of distilled water, and stir in a water bath at 40°C Make the two fully dissolve, then add 18g of orange peel vitamin C powder, mix evenly and move it into a high-pressure emulsifying shear homogenizer, and emulsify and shear at a shear rate of 5500r / min under the conditions of a pressure of 25MPa and a temperature of 43°C. After 15 minutes, a uniform emulsion was obtained; next, measure 250...

example 3

[0029] First weigh 500g of orange peel, wash it with deionized water, dry it under the hot sun, crush it with a jet mill, soak it in 2L of petroleum ether for degreasing for 2 hours, and then add the degreased orange peel to the other after distilling and recovering petroleum ether. In anhydrous ethanol with 3 times the volume, ultrasonically extract at 60°C with 200W power for 2h; after ultrasonic extraction, transfer the absolute ethanol extract into a rotary evaporator, heat up to 65°C, and remove residual absolute ethanol by rotary evaporation , dried in a vacuum freeze dryer, pulverized and passed through a 200-mesh standard sieve to obtain orange peel vitamin C powder; then weighed 10g of gelatin and an equal mass of gum arabic and added it to 300mL of distilled water, stirred in a water bath at 45°C to make the two Fully dissolve, then add 20g of orange peel vitamin C powder, mix evenly, move into a high-pressure emulsifying shear homogenizer, and emulsify and shear at a...

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PUM

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Abstract

The invention discloses a preparation method of erasable neutral ink, which belongs to the technical field of ink preparation. The present invention extracts vitamin C from orange peel, and compound-coats it with gelatin and gum arabic to prepare microcapsules, uses indoxyl as the ink dye, and supplements surfactants, thickening rheological agents, etc. to improve the stability and fluidity of the ink. Denaturation, thereby obtaining the preparation method of erasable neutral ink. The invention is easy to operate, uses gelatin and gum arabic to compound vitamin C to make vitamin C microcapsules, uses indoxyl as ink dye, and the raw materials are safe and environmentally friendly, so that the finally prepared erasable neutral ink has higher thixotropy , stability and fluidity, smooth writing feel, clear lines, and easy to erase, has broad application prospects.

Description

technical field [0001] The invention discloses a preparation method of erasable neutral ink, which belongs to the technical field of ink preparation. Background technique [0002] Neutral ink is widely used for permanent document preservation because of its smooth and smooth writing feel, no ink bleeding or ink leakage; writing resistance to light, water, temperature and chemical stability (acid resistance, alkali resistance, strong oxidant resistance, bleaching agent, etc.). accepted by people. However, it is inevitable that mistakes will occur when writing, and correction fluid must be used for writing. However, it is inconvenient to use correction fluid products and the toxicity of correction fluid has gradually attracted people's attention. [0003] The current erasable inks are as follows: [0004] (1) Oil-soluble ballpoint pen erasable ink that can be wiped off with a rubber, because the dye or pigment is wrapped with a polymer rubber substance to volatilize the solv...

Claims

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Application Information

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IPC IPC(8): C09D11/17C09D11/18C09D11/16
CPCC09D11/17C09D11/16C09D11/18
Inventor 张静张帆林大伟
Owner 张静
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