Within plastics, a distinction is made:
1) plastomers – termoplasty i duroplasty (thermosetting and chemically setting);
2) elastomery.

The production of plastics is based on two types of chemical reactions. As a result of them, macromolecules are formed from small monomer molecules. What are these …

Wooden window profiles should be made in a way that ensures water drainage. What minimum angle of inclination is required here?
The minimum angle of inclination of the window profiles is 15 °, an angle of 30 ° is preferred.

To ensure a sufficiently thick layer of coating on the edges of window profiles, all …

Sand-lime brick

What properties should a lime brick wall have–sand, if it is intended to be covered with a permanent coating?
The substrate should be firm, clear, with no scratches, seek, free of efflorescence and foreign bodies.

What are the disadvantages of a sand-lime brick facade? …

Brick and clinker

What is the difference between clinker and ordinary brick?
Bricks are made of clay and loam, with or without slimming admixtures, and then burns out. A distinction is made between the facing brick and the brick used on the inside. Only facing brick …