Adhesives

Question 1

PVA uses, pros and cons

Answer 1

Uses - for wood or card/materials based boards and fabrics. I
Pros - strong join, inexpensive, water based
Cons - indoor use as not weatherproof. Needs clamping until set and fully set in 24 hours

Question 2

Contact adhesives uses, how to use, pros and cons

Answer 2

Uses - veneers, plastics, laminates
Apply on each side and wait for it to become tacking andpush together
Pros - adhesion takes place as soon as 2 surfaces touch, no clamping, multi-material
Cons - can’t reposition once together, expensive, VOC’s

Question 3

UV hardening uses and how to use

Answer 3

mixed materials and cures in uv light. Excess can be cleared off without affecting surface. Clear - usually for glass or transparent materials

Question 4

Solvent cement (PS cement) uses, how to use, pros and cons

Answer 4

Uses - plastic to plastic only
Softens the edges and acts like welding (almost melts the plastic together).
Pros - strong bond, can brush on
Cons - will mark plastic so cant be used in visible areas, expensive, VOC’s

Question 5

Epoxy resin uses, how to use, pros and cons

Answer 5

Uses - can join mixed materials
Resin and hardeners mixed together and chemically sets
Pros - strong bonds, versatile, good chemical and heat resistance
Cons - can be time consuming and takes a long time to set, expensive, have to mix 2 things together, messy

Question 6

Acrylic cement uses, how to use, pros and cons

Answer 6

Uses - plastics, used for edge gluing
dissolves the surface of hard plastics
Pros - rapid bonding of acrylics
Cons - difficult to apply, difficult to get a neat join, expensive, VOC’s

Question 7

Hot melt glue uses, how to use, pros and cons

Answer 7

Uses - model making, any materials
heating stick of glue and when cooled hardens
Pros - range of colours, good bond for models, quick to harden
Cons - not good for final models, safety issues

Question 8

Superglue uses, pros and cons

Answer 8

Uses - all materials, industrial, medical
Pros - strong, fast acting, easy to use, clear lines
Cons - short shelf life, skin contact