Hot-melt adhesive is a big category, PUR hot-melt adhesive is one of them, most hot-melt adhesives are heat-operated, can be reheated after bonding, and are reversible, while winlong-PUR hot-melt adhesive is wet Gas-reactive hot-melt adhesive, heated operation, will react with the moisture in the air after bonding, and it will be irreversible after the reaction
Two-component polyurethane adhesives are usually composed of an isocyanate component (curing agent) containing NCO and a hydroxyl component (main agent) containing hydroxyl groups. When using, mix the two liquid components according to a certain ratio, use NCO and OH to react to form solid polyurethane, and then use the polar group of polyurethane to form
Epoxy glue is an important thermosetting resin glue. Especially because of its excellent physical and mechanical properties, electrical insulation properties, chemical corrosion resistance, heat resistance and bonding properties, the epoxy resin adhesive prepared with it is known as "multi-purpose adhesive" and can be widely used in chemical industry, Industrial fields such as light industry, water
There are many binding methods available today, such as PUR (PolvurethaneReactive-polyurethane reaction), EVA (ethylenevinylacetate-ethylene acetate) hot sol, PVA (ethylene polyacetate) cooling emulsion type of different adhesive methods. In addition, there are various lock-stitch binding and so on. PUR appeared around 1989 and was first tested and applied on a manual binding system in North America.
When it comes to EVA, everyone knows what EVA is, but do you know what EVA is used for? Everyone may say that EVA is not used for packaging lining. If you think so, then you are really wrong. EVA material is a common name we define. Its alias is ethylene-vinyl acetate copolymer, and its
We all know that glue is the source of formaldehyde, why use formaldehyde glue? For the simplest example, even if it is boiled water, can you scoop it up with a spoon, put it into a cup, and then pour it in? There will definitely be air bubbles in the process, and the glue will
With the gradual development of the times, people's lives have changed a lot, and various new materials are used more and more widely, such as pvc and eva materials, which are especially widely used in life now, but most people easily confuse them , Today, the editor of Xi'an Mingsheng Construction Engineering Costs will come
Advantages of epoxy adhesives： ① Epoxy resin contains a variety of polar groups and highly active epoxy groups, so it has strong adhesion to metals, glass, cement, wood, plastics and other polar materials, especially materials with high surface activity. At the same time, the cohesive strength of the epoxy cured product is also very large,
The advantages of urea-formaldehyde resin powder: We all know that urea-formaldehyde resin glue powder can be quickly dissolved in cold water. Add a specified amount of glue powder while stirring in a certain amount of water, and stir for 1 to 5 minutes. The glue powder will be completely dissolved after standing for 15 minutes.
Epoxy resin glue is chemically reacted with epoxy resin through curing agent to form a network three-dimensional polymer. So, next, I will introduce how long it takes for epoxy resin glue to fully cure. 1. How long does it take for epoxy resin glue to fully cure Generally, the epoxy resin adhesive needs to be
