Wood Adhesive

Question 1

A medium that allows the surfaces
of two or more items to be attached or bonded
together.

Answer 1

ADHESIVE

Question 2

Kinds of Adhesive

Answer 2

Natural

Synthetic (Man-Made)

Question 3

(Type of Adhesive) This is derived from dairy by-products that
are dried, treated and mixed with chemical
additives to produce a powder which, when
mixed with water, is ready for use.
It is general joinery assembly work and in
the manufacture of plywood. It tends to stain
some hardwoods.

Answer 3

CASEIN

Question 4

(Type of Adhesive) This is very widely used synthetic resin
adhesive, for such things as general assembly
work and binding within some manufactured
boards (including MDF)

Answer 4

UREA FORMALDEHYDE

Question 5

(Type of Adhesive) MUF is an adhesive with more melamine
than urea which can enhance moisture
resistance to bring it above boil – resistant
(BR) rating.
Its usage is similar to that of UF

Answer 5

MELAMINE UREA FORMALDEHYDE

Question 6

(Type of Adhesive)The main purpose of these adhesive type is to provide the best moisture resistance
(weather and boil proof – WBP) to structural
wood.They are also used as a binder in
particleboard and wafer boards.

Answer 6

PHENOL FORMALDEHYDE

Question 7

Because of their WBP properties, these
adhesives are highly suited to the assembly of
external structures and marine applications. They, are, however, expensive. Glue lines
can result in the staining of wood.

Answer 7

RESORCINOL FORMALDEHYDE

Question 8

(Type of Adhesive) These are thermoplastic adhesives consisting
of a simple to use, one – part water – based
emulsion with additives to produce either a
standard interior type, cured mainly by
evaporation and used extensively for glueing
internal joinery components and veneering, or an
improved PVAc which gives higher moisture
resistance by inducing a chemical reaction.

Answer 8

POLYVINYL ACETATE

Question 9

(Type of ADHESIVE) These are made of natural or synthetic
rubber and a solvent which evaporates when
exposed to the air, giving off a heavy
flammable vapour. They are used in the
bonding of wood and plastic veneers
(laminated plastics) to wood based materials.

Answer 9

CONTACT ADHESIVE

Question 10

(Type of adhesive) These are either semisolid rods or pellets or
come in the form of tapes or films, which are
melted for application by heat.
As they cool, they reharden to their original
strength.

Answer 10

HOT MELT SYNTHETIC ADHESIVE

Question 11

(Type of adhesive) The use of this type of adhesive is limited to
specialised applications, for example glueing
wood to metal of glass reinforcing plastics
(GRP) and small repair work.

Answer 11

EPOXY SYTHETIC ADHESIVE

Question 12

(Char.)Adhesives may be of the one – or two –

component type – liquid, powder or both.

Answer 12

FORM

Question 13

(Char.)This refers to the adhesive’s inherent ability
to resist decomposition by moisture.

Answer 13

MOISTURE RESISTANCE

Question 14

Classification of Moisture Resistant

Answer 14

INT (Interior)
MR ( moisture and moderately weather resistant
BR (Boil resistant)
WBP (Water and boil proof)

Question 15

(Char.)They are used in situations where a tight fit
cannot be assured and where structural
components are to be bonded.

Answer 15

GAP FILLING

Question 16

(Char.)This refers to the pressure necessary to ensure
a suitable bond between the two or more
surfaces joined together.

Answer 16

BOND PRESSURE

Question 17

(Char.) Time will be required to accurately set
cramping devices and correctly position
frame components; each type and make of
adhesive will state the time allowed for this.

Answer 17

ASSEMBLY (CLOSED) TIME

Question 18

(Char.)This is the length of time that the
containerised adhesive will remain suitable
for use.

Answer 18

STORAGE OF SHELF LIFE

Question 19

(Char.)This is the length of time allowed foe use after

either mixing or preparing the adhesive.

Answer 19

POT LIFE

Question 20

Methods and equipment used to apply adhesives
will depend on the following factors:

Answer 20

 Type of adhesive
 Width of surface to be covered
 Total surface area
 Work situation
 Clamping facilities available
 Quality of work

Question 21

The spreading equipment could be any one of

the devices listed below:

Answer 21

 Mechanical spreader
 Roller
 Brush
 Spatula
 Toothed scraper

Question 22

Failure to carry out the prrcautions about adhesives

Answer 22

An Explosion
Poisoning
Skin Disorders

Question 23

The cover of an adhesive product must contain:

Answer 23

Good Housekeeping
Skin Contact
Ingestion
Eye protection
Fire risk
Toxicity