Joining techniques

Question 1

Name 7 adhesives

Answer 1

• contact adhesive
• acrylic cement
• Epoxy resin
• PVa
• Hot melt glue
• Cyanoacrylate ( super glue )
• PS cenemt

Question 2

Contact adhesive

Answer 2

Description
- Used to stick surfaces that touch once; bonds quickly when both sides are coated and pressed together (e.g., laminates).

Material
- veneers, plastic laminates

Advantages
- takes place as soon as two surfaces are pressed togeather
- no clamping required
- multi material

Disasvantages
- No oppotunity to reposition peices
- relatively expensive

Health and saftey
- fumes are very dangerous, good ventalation is required.

Question 3

Acrylic cement

Answer 3

Description
- A clear, runny liquid used to join acrylic and other plastics by melting the surfaces slightly (e.g., Tensol cement).

Material
- acrylic

Advantages
- rapid bonding of acrylics

Disasvantages
- Difficult to apply
- relatively expensive

Health and saftey
- very dangerous fumes, good ventalation is required

Question 4

Epoxy resin

Answer 4

Description
- A strong, two-part adhesive (resin + hardener) used for bonding different materials like metal, wood, or plastic.

Material
- all

Advantages
- High strength bonds
- Excellent heat and chemical resistance.

Disasvantages
- Expensive
- Reache full strength after few days
- can be messy

Health and saftey
- Avoid contact with skin

Question 5

PVA

Answer 5

Description
- A common white glue used for wood, paper, and card; sets slowly and dries clear.

Material
- wood , fabric, styrofoam

Advantages
- Gives a strong joint
- Relatively inexpensive
- waterbased

Disasvantages
- Surfaces need to be clamped togeather for a long period.
- not waterproof

Health and saftey
- No special precautions necessary

Question 6

Hot melt glue

Answer 6

Description
- Solid glue sticks melted in a glue gun; bonds quickly as it cools and hardens (used for craft and model work).

Material
- any materials for model making

Advantages
- Quick to harden
- Range of colours
- good bond for models

Disasvantages
- Not great for final models
- safety issues with hot glue

Health and saftey
- Will blister skin

Question 7

Cyanoacrylate ( super glue )

Answer 7

Description
- Fast-setting glue for small, clean surfaces; works on plastics, rubber, metal, etc.

Material
- Industrial, medical and home use
- all materials

Advantages
- strong
- fast acting

Disasvantages
- skin contact
- short shelf life

Health and saftey
- avoid contact with skin and eyes

Question 8

PS cement

Answer 8

Description
- Used for bonding polystyrene plastics; melts surfaces slightly to fuse them together (common in model kits).

Material
- Model kits, HIPS, ABS

Advantages
- strong bond
- can use brush to apply

Disasvantages
- expensive
- contains VOC’s

Health and saftey
- use within a well ventalated room.