This document provides an introduction to adhesives, including definitions of key terms like adhesive, glue, resin, adhesion, and adherend. It also discusses important factors in selecting glues like strength, cost, application method, and resistance to moisture and heat. The properties of adhesives that affect bonding strength are described, such as ability to spread, penetrate, cure, and displace surface contaminants. Advantages of adhesives include joining small particles and materials together, providing electrical insulation, and preventing corrosion at lower cost than fasteners. Disadvantages include needing surface treatment, potential for other failures, low shelf life, difficulty predicting durability, and sometimes being more expensive than fasteners.

1. CHAPTER 1
INTRODUCTION TO
ADHESIVE
By Nur Isfarina binti Ismail

2. ADHESIVE
 A mixture in liquid/ semiliquid that used to bond
two item together by adhesion to surface
attachment.
 From synthetic or natural.
 Required control temperature to cure.

3. TERMINOLOGY
 ADHESIVE
: Substances that
liquid/semiliquid that used to bond 2 or more
substrate by surface attachment.
 GLUE
: refer to adhesive that source from
hard gelatine.
 RESIN
: solid, liquid or semiliquid synthetic
organic polymer uses as basis of adhesive,
hardener or etc.
 ADHESION
: a process that held 2 or more
material using adhesive.

4. CONTINUE..
 ADHESIVE BONDING: method used to joined 2
or more material using adhesive.
 ADHEREND : a material that will held together
using adhesive.
 ABHESION
: condition that having minimal
adhesion
 COHESION
: single substances/ adhesive
held together by primary a secondary valence
forces.

5. CONTINUE..
 PRACTICAL ADHESION: measure physical
strength of adhesive bond.
 INTRINSIC ADHESION: molecular forces of
attraction between liquid and solid.
 BINDER
: component of adhesive composition
that responsible for adhesive forces.
 HARDENER: substances that added into
adhesive to control curing.

6. CONTINUE..
 SOLID CONTENT: percentage of non-volatile in
adhesion.
 SHELF TIME: maximum time the adhesive can
be stored.
 GLUE SPREAD: amount of glue applies in wood
surface.
 VISCOSITY: the level of consistency in adhesive;
either very liquid and easy to flow or very thick
and difficult to flow.

7. CONTINUE..
 INTRINSIC BONDING: molecular forces that
attraction between the adhesive and substrate.
 GAPS FILLING PROPERTIES: ability of glue to
fill the gaps of joint.
 GEL TIME: required time for adhesive to become
gel.
 ASSEMBLE : the time between spreading
adhesive until it be pressed/heated.

8. CONTINUE..
 INTERFACE: a point where 2 things meet in
interact at the surface.
 GLUELINE: where the adhesion takes place.
 BONDING STRENGHT: the strength of bonding
material.

9. IMPORTANT FACTOR IN
SELECTING GLUE
 STRENGHT
- high strength in timber joint.
 COST
- cost of adhesive
 APPLICATION
- ease of application
 RESISTANT
- resistant to moisture and heat
 COLOR
- colour depend on strength and type of adhesive

10. PROPERTIES OF ADHESIVE
AFFECT STRENGTH OF
ADHESION
 FEATURES: solid, semi-solid or liquid
 SPREAD: ability to spread and flow
 PENETRATE: ability to penetrate in adherent
 COVER: ability to displace most contiminant
surface
 CURED: become solid when it cured

11. ADVANTAGES
 Can combined small particles.
 Glueline provide and act as electrical insulator.
 Prevent metal from corrosion.
 Low cost than fastener.
 Can joint other material (plastic + wood).

12. DISADVANTAGES
 Required special surface treatment.
 Bonding can induce other failure.
 Low shelf time.
 Difficulty to predict durability.
 Sometimes more expensive from fastener.