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87044
Adhesives
Description
A-Levels Graphical Products AS (Joining Techniques) Mind Map on Adhesives, created by Poppy Venables on 13/05/2013.
No tags specified
graphical products as
joining techniques
graphical products as
joining techniques
a-levels
Mind Map by
Poppy Venables
, updated more than 1 year ago
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Created by
Poppy Venables
over 11 years ago
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Resource summary
Adhesives
Contact adhesive
Sticks Metals and polymers; unlike materials: e.g. plastic to wood and fabric to most materials
Advantages
Able to bond unlike materials
Bond forms very quickly so less need for clamping
Ideal for glueing large sheet material
Sold in metal tubes for easy application
Disadvantages
Must be applied to both surfaces and some time must be allowed before they can be pushed together.
Relatively expensive
Solvent-based so contains harmful volatile compounds
Acrylic Cement
Sticks Acrylic
Advantages
Rapid bonding of acrylics
Disadvantages
Can be difficult to apply and give a neat join
Relatively expensive
Solvent based so contains harmful volatile compounds
Polystyrene cement
Sticks High impact Polystyrene (H.I.Ps) (not expanded polystyrene)
Advantages
Strong bond - melts surface of pieces to be joined and cause them to weld together.
Able to use brush to apply (water-like consistency) and absorbed into joint by capillary action
Disadvantages
Relatively expensive
Solvent based so contains harmful volatile compounds
Epoxy resin
Sticks most materials including expanded polystyrene
Advantages
High performance adhesive giving high-strength bonds
Chemical reaction hardens immediatley
Versatile - can be made flexible or rigid, transparent or opaque/ coloured, rapid or slow setting.
Excellent heat and chemical resistance
Disadvantages
Reaches full strength only after a few days
Expensive
Often requires manual mixing of resin and hardener, which can be messy
Polyvinyl acetate (PVA)
Advantages
Gives a strong joint
Relatively inexpensive
Disadvantages
Surfaces need to be securely clamped together for long period in order for PVA to harden
Generally not waterproof (athough some brands are)
Sticks Wood and porous materials
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