What is the best glue for particle board?
In this paper, the types of particle board adhesives used and the preparation of adhesives are described in detail. Adhesive is one of the important materials for the production of artificial boards. The quality of the use of the adhesive is very important to the quality of the artificial boards.
In actual production, it is hoped to manufacture a particle board with a small amount of glue, high strength, good quality and low cost. Therefore, higher requirements are put forward for the glue technology and glue application equipment, and the appropriate ratio of particle and glue amount is correctly determined. And how a small amount of glue is evenly distributed on the surface of a large amount of shavings is a very important issue.
The manufacture of particle board mainly uses thermosetting resin adhesives in organic adhesives. In addition, adhesives based on animal and vegetable gums can also be used. At present, plant glues and animal glues are of little practical significance. In terms of process and economic effect, formaldehyde resin glue is the most important adhesive. As for inorganic adhesives such as cement and gypsum, although they can be made into cement particle board and gypsum particle board, their products are still relatively small in terms of the total particle board output.
Urea formaldehyde resin (abbreviated as UF resin) is urea and formaldehyde in aqueous solution, adding catalyst. Polycondensation by heating. Urea-formaldehyde resin glue can meet the performance requirements of particle board manufacturing. If it has a high solid content, it can generally reach 60% to 70%; the viscosity of the glue is low, about 70 to 350 MPa s; it has a certain active period (about 6 to 60 MPa). 8 h) and shorter curing time. Urea-formaldehyde resin glue is light in color and can be used in places with low water resistance requirements, such as furniture manufacturing and interior decoration. In addition, compared with other resin glues, its price is relatively low. Therefore, the most important adhesive for the manufacture of particle board is always urea-formaldehyde resin.
Polyvinyl acetate. Often referred to as wood glue, PVA comes in two formulations—white and yellow—with the latter being the stronger of the two. This type of glue comes in a plastic bottle with a tapered top that the user can open and close. Application involves squeezing the bottle. Compared to other glues, PVA has a longer drying time and requires clips to hold the two pieces in place until the glue sets.
Polyurethane glue. Like PVA, urethane glue comes in a plastic squeeze bottle. It is more versatile than wood glue and can bond to stone, concrete, ceramics and wood. While not as strong as PVA, it is stronger than wood, which will crack long before it is glued. As an added bonus, polyurethane glue is also waterproof, making it a versatile choice for more than just particle board use.
