Paint rollers

The ability to store paint, and consequently the performance of the painting struggle.
Various factors decide about it, of which the most important is:
1) roller width,
2) shaft circumference,
3) roller cover type,
4) hair height.

The materials most often used to cover paint rollers.
To cover the paint rollers is used: lamb fleece, woven or knitted covers of plastics (polyamides and polyesters), mohair fabrics, goat hair fabrics and soft synthetic foam.

Advantages and disadvantages of lamb fleece as a paint roller cover.
Advantages:
Natural lamb's fleece has a very high paint absorption capacity. Usually, a pile as high as a hair is used 18-24 mm. Such a roller coating ensures that the paint is applied with a thin and even layer.
Defects:
Natural lamb fleece is very susceptible to aggressive substances, such as lyes and solvents. Moreover, the cost of such a cover is, three times the size of a synthetic fiber cover.

The most suitable materials for the coating of paint rollers for the application of the following materials:
a) dispersion paint for the outer wall – for painting ceilings, walls and facades of buildings with dispersion paints are mainly spun, medium roughened- and long-haired plush fabrics made of polyamide fibers, about the height of a hair 15-25 mm;
b) varnish diluted with a solvent – high-quality short-pile mohair fabrics with pile height are suitable for painting with varnishes containing solvents 4-6 mm, as well as soft synthetic foam;
c) dispersion varnish – for painting with dispersion varnishes, a special plush is best suited, in which the hair is very dense, and the ends are separated.

In devices equipped with paint rollers powered by pumps (pressure feeding of the material) paint or varnish is supplied directly. This makes it possible to eliminate immersion in the paint bucket and the siphoning off of excess material, which of course means a significant increase in performance.
In painting equipment equipped with rollers powered by pumps (under pressure) three solutions can be distinguished:

1) special pump with an electric motor, feeding the roller from the inside;
2) airless pressure device driven by an electric or internal combustion engine, feeding the roller from the inside;
3) an airless device with electric or diesel drive, giving matter! by spraying directly onto the roller. The paint rollers, fed with paint from the inside, are covered with a permeable material, the length of a hair 13-25 mm.

There are two different solutions among paint roller cleaning devices:
1. Most often, the paint roller cleaning devices operate at the normal water pressure of the tap. The water jet is directed onto a shaft rotating in the housing. A high centrifugal force is created in the rapidly rotating roller, which causes the paint residue to spin.
2. Another type of roller cleaning device is connected to the pressurized system. A very strong stream of water, gushing from nozzles located on the sides of the device housing, is directed to a paint roller located inside the cover of the cleaning device. The paint roller is cleaned in a short time and with relatively little water consumption.