1. CHAPTER 1 INTRODUCTION TO ADHESIVEBy Nur Isfarina binti Ismail

2. ADHESIVE A mixture in liquid/ semiliquid that used to bondtwo 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 2or more material using adhesive. ADHEREND : a material that will held togetherusing adhesive. ABHESION: condition that having minimaladhesion COHESION: single substances/ adhesive held together by primary a secondary valence forces. 5. CONTINUE.. PRACTICAL ADHESION: measure physicalstrength of adhesive bond. INTRINSIC ADHESION: molecular forces ofattraction between liquid and solid. BINDER: component of adhesive composition that responsible for adhesive forces. HARDENER: substances that added intoadhesive to control curing. 6. CONTINUE.. SOLID CONTENT: percentage of non-volatile inadhesion. SHELF TIME: maximum time the adhesive canbe stored. GLUE SPREAD: amount of glue applies in woodsurface. 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 thatattraction between the adhesive and substrate. GAPS FILLING PROPERTIES: ability of glue tofill the gaps of joint. GEL TIME: required time for adhesive to becomegel. ASSEMBLE : the time between spreadingadhesive until it be pressed/heated. 8. CONTINUE.. INTERFACE: a point where 2 things meet ininteract at the surface. GLUELINE: where the adhesion takes place. BONDING STRENGHT: the strength of bondingmaterial. 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 contiminantsurface 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.