PLYWOOD
ADHESIVE RESINS and CATALYSTS
Plywood adhesives are sythetic
glues made from chemical raw materials through condensation polymerizatiton.
The glues used are thermosetting types which cure or harden by the action
of heat or catalyst.
Urea-formaldehyde (UF) and
phenol-formaldehyde
(PF) resins are two common types of plywood adhesives.
UF resins are used for the
manufacture of interior grade plywood while PF resins are for exterior
and marine-grade plywood. A catalyst or hardener is added to the
UF resins to accelerate curing or hardening. PF resins, on the other
hand, can be made to cure and harden under heat with or without a catalyst.
|
TYPE
|
APPLICATIONS |
|
Urea-Formaldehyde
|
-
Interior grade hardwood plywood. High tack for pre-press.
Passed U.S. standards.
-
Interior grade particle and mdeium density fiberboard
|
|
Urea-Melamine-Formaldehyde
|
-
Interior grade particle and mdeium density fiberboard with
good water resistance and very low formaldehyde emission
|
|
Phenol-Formaldehyde
|
-
Exterior and marine grade plywood. Meets U.S. and British
standards.
|
| |
|
|
Hot Press Catalyst
|
-
Catalyst for UF for hot-press operations. Fast cure.
|
|
Splicer Catalyst
|
-
Catalyst for UF for splicing veneers.
|
|
Cold Press Catalyst
|
-
Catalyst for UF for cold-set operations. Fast cure.
|
|
Hot Press Catalyst
|
|
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