Solving in One Step the Problem of Paint Removal for Reclaimed ABS

ABS has features of good compression resistance, good rigidness, wear-resistance, good impact strength, high temperature resistance and good corrosion resistance. General chemicals are not easy to corrode ABS.

In order to beautify ABS products, paint will be used. However, as the paint is used for a long period of time, it is prone to ageing and part of the bumps will fall off. Or, ABS products will be scratched due to one or other reasons, resulting in a decrease in aesthetics. More importantly, in the recycling of waste plastics, the existence of paint is not conducive to the recycling cycle. At this time, it is necessary to remove the paint from the surface of ABS plastic products.

In fact, it is not very difficult to remove the paint on the surface of ABS products. Just use a common chemical-paint remover. We believe many people have begun to use paint remover to get rid of the paint. If the traditional physical paint stripping method is used, it must be a waste of manpower and material resources, it takes a lot of time, and the effect is not satisfactory.

Paint remover is also known as de-paint agent or paint washing agent. The current paint strippers have different properties according to their components. However, the paint stripping mechanism basically depends on a series of physical and chemical comprehensive effects such as dissolution, penetration, swelling, peeling, and reaction effect.

1. It has a strong ability to dissolve the resin and does not corrode the matrix.
2. Low toxicity, good stability in storage and transportation.
3. The cost is low, the dosage is small, and the production process is simple.
4. It can be used repeatedly. Too much waste paint remover will affect post-processing.

In addition, paint removers generally require a relatively high boiling point to achieve a thorough paint removal effect.

This type of paint remover uses strong alkali to remove paint under heating, and generally requires heating when used. On one hand, alkali will saponify certain groups in the paint and dissolve in water; on the other hand, use hot steam to cook the paint base so that it loses its strength and adhesion to the metal together with infiltration, penetration and affinity of surfactant. So the old paint layer fades away. The disadvantage of this type of paint remover is that it takes a long time to remove paint, it is also corrosive and requires certain heating conditions.

Acidic paint remover is usually made by mixing 98% concentrated sulfuric acid, xylene, and formic acid. Due to its passivation reaction with the metal substrate, it makes little corrosion effect on the substrate. In addition, it is low in cost, easily soluble in water, and does not require heating; The process only lasts 20 minutes.

However, there are obvious shortcomings. First, concentrated sulfuric acid is very corrosive and requires relatively high operational safety. At the same time, the use of concentrated sulfuric acid has high requirements on the tightness of the equipment, otherwise the concentrated sulfuric acid will easily absorb moisture and cause the concentration to become thin and invalid.

Abandoning the more toxic solvents such as methylene chloride in the traditional paint remover, solvents such as benzyl alcohol, ethylene glycol butyl ether and propylene glycol carbonate make the paint remover more environmentally friendly with lower toxicity and less harm to the human body. In addition to using benzyl alcohol as the main solvent for the water-based paint remover, the water-based paint remover also uses dimethyl sulfoxide as a co-solvent to promote the dissolution and expansion of the paint. The water-based paint remover also needs to add formic acid as an accelerator, because acidic substances will accelerate the breaking of polymer macromolecular chains in the paint film and cause the paint film to dissolve. In addition, the water-based paint remover should be added with a corrosion inhibitor and a thickener. The water-based paint remover is added with a corrosion inhibitor to prevent the paint remover from corroding the material during the paint removal process. The thickener is added to make the water-based paint remover have good dispersion, emulsification and stability.

Features

First of all, environmental protection is less toxic than traditional paint removers which greatly reduces environmental pollution and causes less physical harm to users of paint removers. In terms of paint removal, the addition of acidic accelerators can speed up the paint removal efficiency of the water-based paint remover, and the effect of paint removal is more obvious, and it is rare that the paint removal is incomplete. After the paint is stripped with the water-based paint remover, you only need to rinse it with water, and the stripped surface will not contain grease residues. However, the water-based paint remover cannot directly touch the skin during use, and it is still corrosive to the skin. Once the skin is accidentally stained with the water-based paint remover, it should be rinsed with water immediately.

Application Method

Immersion: soak all the workpieces to be stripped in the paint remover. The soaking time depends on the situation of different workpieces. Generally, it is more than half an hour when the old paint film swells strongly and bulges. All the paint will fall off. After taking it out, use high-pressure water to remove the remaining paint flakes on the surface of the workpiece, and then wash it off with clean water.

Brushing: For large workpieces, use a brush or cotton yarn to apply the paint remover to the painted part. For workpieces with thick paint film, you can repeatedly paint for 2-3 times until the paint film falls off. The cleaning process is the same as the immersion type.

Paint Remover for Motorcycle Shell

Removal of paint on the surface of ABS plastic depends on the size and ease of disassembly of the ABS object. It is best to put the ABS plastic object in the paint remover and soak it for 3-5 minutes, then pick it up and rinse it with water. If the ABS object is relatively large, it is necessary to apply the paint remover on the paint surface with a brush. After the paint remover reacts for 3-5 minutes, rinse with water.

The paint remover not only solves the problem of how to remove paint on the surface of ABS plastic, but also greatly improves the recycling rate of ABS plastic, making it more green and environmentally friendly, and reducing the production cost of ABS plastic.