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DT > Adhesives > Flashcards

Adhesives Flashcards

1
Q

Name 6 different types of adhesive

A
  1. PVA
  2. Epoxy resin or Araldite
  3. Hot glue or hot melt adhesive
  4. Dichloromethane
  5. Superglue (cyanocrylate)
  6. Contact adhesive
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2
Q

What type of material is PVA used to glue?

A

Wood
Card
Paper

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3
Q

What is the drying time of PVA glue?

A

4-24 hours

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4
Q

Describe the mechanism of gluing for PVA

A

PVA (Poly Vinyl Acetate) is a water based adhesive which is white in colour drying to semi-translucent. It soaks into the absorbent surface then dries to give a strong plastic bond. It dries by evaporation and absorption.

It cannot stick together NON absorbent surfaces

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5
Q

What type of material is epoxy resin Araldite used to glue?

A

Wood
Metal
Glass
Stone

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6
Q

Hoe long does epoxy resin (Araldite) take to dry?

A

30 mins to 6h

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7
Q

What is the mechanism of epoxy resin (Araldite) binding?

A

This is a waterproof adhesive and gives a strong joint.

It comes in 2 tubes: a resin and a hardener. These are mixed together in equal amount and then applied with a spreader.

Joints need to be held together while the glue drys

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8
Q

What is hot glue (hot melt adhesive) used to glue?

A

Paper, cardboard and cloth

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9
Q

How long does hot glue (hot melt adhesive) take to cool?

A

2 mins

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10
Q

What is the mechanism of gluing for hot glue (hot melt adhesive)?

A

This adhesive is waterproof bit is WEAK and only suitable for modelling or temporary fixings.

It comes in a solid glue stick gun

It is heated in a special gun and applied direct from the nozzle

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11
Q

What material is dichloromethane used to glue?

A

Thermoplastics

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12
Q

How long does dichloromethane take to dry?

A

10 mins

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13
Q

What is the mechanism of gluing for dichloromethane?

A

It is a waterproof adhesive which gives a medium strength joint. It comes in liquid form.

Joints need to be held together while the glue drys.

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14
Q

What is cyanocrylate also known as?

A

Superglue

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15
Q

What can superglue bind together?

A

Metal

Ceramics

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16
Q

How long does super glue take to dry?

A

Instant

17
Q

How does superglue actually glue?

A

Add glue to one side press it against the other uncoated side. It will bind instantly and doesn’t need to be help together.

18
Q

What material is contact adhesive used to glue?

A

Wood
Fabric
Porous material

19
Q

How long does contact adhesive take to glue?

A

30-40 mins

20
Q

What is the mechanism of gluing for contact adhesive?

A

Apply to both surfaces
Needs to set partly before bonding
Works with porous material

DT (7 decks)

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