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Cleaning agent for ink printed on surface of plastic and preparation method

A technology of surface printing and cleaning agent, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problems of workers' health damage, failure to recycle plastics, low selectivity, etc., to achieve low impact and cleaning speed. Fast, easy-to-obtain results

Inactive Publication Date: 2007-10-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But gasoline, kerosene also have some following disadvantages: the first is safety problem
The flash point of gasoline is only over 20 degrees. If the ventilation facilities in the printing factory are not good, dangerous situations will easily occur
Even if the air circulation in the factory building is good, there will be no danger in the workshop, but after the steam and kerosene after cleaning the ink are discharged, there is also the danger of explosion in the season when the outdoor temperature is relatively high
The second is pollution
If this happens for a long time, it will cause different degrees of damage to the health of workers
The third is that if kerosene and gasoline are used as cleaning agents for printing ink on plastic surfaces, due to the strong dissolving power of kerosene and gasoline, in addition to dissolving the ink, it will also dissolve the plastic substrate at the same time, failing to achieve the purpose of recycling plastics
However, when used to clean printing inks on plastic surfaces, this type of cleaning agent also has the disadvantages of low selectivity, soluble base material, complex formula and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The weight composition of each component is:

[0012] 45 kg of isopropanol;

[0013] 31 kg of ethyl acetate;

[0014] Acetone 23 kg;

[0015] Dimethyl sulfoxide 1 kg

[0016] Pour 31 kg of ethyl acetate and 23 kg of acetone into 45 kg of isopropanol in turn, stir with a mechanical mixer at a speed of 120 rpm for 1 minute to make it evenly mixed, and then add 1 kg of dimethyl sulfoxide , mixed at a stirring speed of 120 rpm for half a minute to obtain a colorless and transparent solution.

[0017] The workpiece to be cleaned using the ink cleaning agent of this example is a plastic bottle with printing ink on the surface. Before cleaning, crush the plastic bottle to make particles with a diameter of about 0.5 cm. Submerge 1 kg of crushed plastic particles in 5 kg of the ink cleaning agent of this example, process it with a mechanical stirrer at a stirring speed of 150 rpm for 3 to 4 minutes, then take it out and wash it with water, and it is found that the ink is cl...

Embodiment 2

[0019] The weight composition of each component is:

[0020] 40 kg of isopropanol;

[0021] 38 kg of butyl acetate;

[0022] Acetone 20 kg;

[0023] Heavy liquid paraffin 2 kg;

[0024] Pour 38 kilograms of butyl acetate and 20 kilograms of acetone into 40 kilograms of isopropanol successively, stir with a mechanical mixer at a speed of 120 rpm for 1 minute to make it evenly mixed, then add 2 kilograms of heavy liquid paraffin, Mix for half a minute at a stirring speed of 120 rpm to obtain a colorless and transparent solution.

[0025] The workpiece to be cleaned using the ink cleaning agent of this example is a plastic bottle with printing ink on the surface. Before cleaning, crush the plastic bottle to make particles with a diameter of about 0.5 cm. Submerge 1 kg of pulverized plastic particles in 5 kg of the ink cleaning agent of this example, process it with a mechanical stirrer at a stirring speed of 120 rpm for 3 to 4 minutes, then take it out and wash it with water...

Embodiment 3

[0027] The weight composition of each component is:

[0028] 55 kg of isobutanol;

[0029] 27 kg of ethyl acetate;

[0030] Butanone 15 kg;

[0031] Dimethyl sulfoxide 3 kg

[0032] Pour 27 kg of ethyl acetate and 15 kg of methyl ethyl ketone into 55 kg of isobutanol in turn, stir with a mechanical mixer at a speed of 120 rpm for 1 minute to make it evenly mixed, and then add 3 kg of dimethyl methylene Sulfone was mixed for half a minute at a stirring speed of 120 rpm to obtain a colorless and transparent solution.

[0033] The workpiece to be cleaned using the ink cleaning agent of this example is a plastic bottle with printing ink on the surface. Before cleaning, crush the plastic bottle to make particles with a diameter of about 0.5 cm. Submerge 1 kg of crushed plastic particles in 5 kg of the ink cleaning agent of this example, process it with a mechanical stirrer at a stirring speed of 120 rpm for 10 to 11 minutes, then take it out and wash it with water to obtain be...

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Abstract

This invention discloses a method for preparing cleaning agent for printing ink on plastic surface. The cleaning agent comprises: organic diluting agent 40-55 parts, organic ester 27-38 parts, ketone 15-23 parts, and nonvolatile component 1-3 parts. The method comprises: dissolving organic ester and ketone in organic diluting agent, mechanically stirring uniformly, then adding nonvolatile component, and mixing uniformly to obtain colorless and transparent cleaning agent. The cleaning agent has such advantages as high selectivity, good cleaning effect, and low solvent volatility, no matrix softening, low toxicity, low harm to human bodies, and simple formula, and can be used for cleaning printing ink on the surface of plastic plate or mackintosh surface, especially the surface of soft plastic package.

Description

technical field [0001] The invention relates to an ink cleaning agent for plastic surface printing, in particular to an ink cleaning agent for the surface of plastic flexible packaging. Background technique [0002] Along with the progress of China's economy and society, China's plastics industry has developed rapidly. The output of plastic products has grown from 1.04 million tons at the beginning of the reform and opening up to the current 36 million tons, including 34 million tons of five major products (PE / PP / PVC / PS / ABS) and 1.2 million tons of engineering plastics (PBT / PC / POM / PMMA, etc.), polyester (PET) 800,000 tons (bottle grade 650,000 tons, BOPET 150,000 tons). In 2005, China produced about 8 million tons of plastic products for packaging and 1.3 million tons of agricultural film. The use of a large number of plastic products has also brought serious environmental protection problems to Chinese society. Since plastics are stable and difficult to degrade, if they...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/00
Inventor 郑大锋刘纲勇
Owner SOUTH CHINA UNIV OF TECH
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