Shandong Increate produce kinds of PUR hot melt adhesive laminating machine, main have cloth film hot melt laminating machine,
panel hot melt laminating machine,solventless hot melt laminating machine. And provide pur hot melt adhesive glue equipment
for conventional hot melt adhesive machine, after a simple upgrade, to make traditional hot melt adhesive laminating machine
upgrade to PUR hot melt adhesive machine
Why choose PUR hot melt adhesive first beginning to understand what is the PUR hot melt adhesive.
PUR (Polyurethane Reactive),
Chinese called moisture curing polyurethane reactive hot melt adhesive. The main component is
isocyanate polyurethane oligomer. PUR's adhesion and toughness (elastic) can be adjusted, and
has excellent bonding strength, temperature resistance, corrosion resistance and aging resistance
and so on. In recent years,it has become one of the important varieties of adhesive industry.
widely used in packaging, wood processing, automotive, textile, mechanical and electrical,
aerospace and other fields of national economy.
Reactive hot melt adhesive is in the inhibition of chemical reaction conditions, such as hot melt
into a fluid, in order to facilitate coating; two kinds of gluing body fit after cooling layer gather
together to bonding; after using to air in the presence of moisture and adherend surface
attachment of moisture reacted with, chain extender, to generate a high cohesion of the polymer
, adhesion, heat resistance, resistance to low temperature were significantly improved. Because of its
high reactivity and shows excellent adhesion to a variety of materials, widely used in washing machine
cover, disinfection cabinet top cover, bookbinding, car lights, furniture edge banding, footwear
and other bonding.
The molecular structure of PUR hot melt adhesive containing very sexual and active chemical ammonia ester -NHCOO- or isocyanate radical (- NCO) containing active hydrogen material, such as wood, leather, fabric, paper,
ceramics and other porous materials and plastic, metal, glass, rubber, etc. the surface clean materials have excellent adhesion.
Most of the hot melt adhesive used of hot melt resin such as ethylene vinyl acetate (EVA), polyester, polyamide in
the past, due to EVA and polyester hot melt adhesive strength and flexibility is poor, unable to bear too much force,
and because of polyamide hot melt adhesive melting point and hardness is higher, when using by certain restrictions.
And polyurethane as hot melt adhesive also has been considered to less successful, because of having a urethane bond
in the application temperature instability, so poly (chloromethyl ester hotmelts varieties less, application field is relatively
narrow. In recent years, countries in the study of the polyurethane hot melt adhesive become active, the hot melt
adhesive in varieties and properties have new development.
And compared EVA hot melt adhesive, water-based and solvent based adhesives, PUR has the following advantages:
No solvent, a liquid type. The drying process is not required for the water - based and solvent - based adhesives, and no
environmental pollution and poisoning problems exist in the solvent to meet the environmental protection requirements.
The bonding process is simple and convenient, and can be applied by roller coating or spraying.
Good operation. In a short period of time, the two can be adhered to the fixed, so the parts can be quickly transferred to
the next processing procedure, improve the work efficiency
Heat resistant, cold resistant, resistant to water vapor, good resistance to chemicals and solvents. And compared to EVA hot
melt adhesive, the reactive hot melt adhesive cross linking structure enables the column properties and bonding strength
is greatly improved.
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