Water-based black paint for fruit bag paper and preparation method of water-based black paint

Abstract

The invention relates to the technical field of fruit bag paper, and particularly relates to a water-based black paint for fruit bag paper and a preparation method of the water-based black paint. The water-based black paint is prepared from the following components in percentages by weight: 20-23% of carbon black, 25-30% of kaolin, 29-43.5% of deionized water, 4-5% of carboxylic butadiene-styrene latex, 3-5% of waterborne acrylic resin, 0.5-1% of polyethylene glycol and 4-7% of propanediol butyl ether. The paint coats single-color paper of the fruit bag paper, is capable of replacing a traditional fruit bag paper manufacturing technology, which adopts a cylinder mould machine for internal drying, is high in wastewater discharge, low in vehicle speed, high in energy consumption and high in pollution, and has the characteristics of being free of wastewater discharge, high in carbon black utilization rate, low in pollution, safe and environmentally friendly; and the obtained fruit bag paper is good in fixing property, colorfast, good in breathability and low in price, and has potential market value.

Description

technical field [0001] The invention belongs to the technical field of fruit bagging paper, and in particular relates to a water-based black paint for fruit bagging paper and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, people's demand for fruits is gradually changing to high-quality and pollution-free, and the fruit bagging process is more and more widely used. The biggest advantage of fruit bagging is to improve the appearance quality and reduce pesticide residues, so that the fruit is pollution-free and the grade of the fruit is significantly improved. [0003] At present, the bagging paper used for the two-color composite layer on the AB side is mostly dyed in the pulp, the outer layer is yellow and red pigments, the inner layer is black dye, and carbon black is commonly used. When pulping, directly pour carbon black into the pulp tank, and then refine the pulp to make the carbon black and wood pulp dyed....

AI Technical Summary

Problems solved by technology

When pulping, directly pour carbon black into the pulp tank, and then refine the pulp to make the carbon black and wood pulp dyed. In the first wire part of the paper machine, hang a layer of pulp, yellow or brown, and then pass through the second wire. 2. Hang one or two layers of black pulp in the three-wire department, press, dehydrate and dry to obtain fruit bagging paper with two colors on the AB side. Waste water can no longer be reused for papermaking, and 100-110 tons of waste water needs to be discharged per ton of paper. The annual domestic demand for this kind of paper is about 400,000-500,000 tons, and it is increasing every year, so the pollution caused by it is serious

Because the black dye needs to have a good combination and air permeability with the bagging paper, there is currently no black paint suitable for fruit bagging paper. The few black paints that exist are priced at a price per ton due to the composition and process. Tens of thousands of yuan, the price is not suitable for the use of fruit bagging paper, nor can it meet the technical requirements in the field of fruit bagging paper

Images