Revision

Question 0

Plastic

Answer 0

. Thermo plastic
. Thermo set plastic
. Oil based
. 100+ year left

Question 1

Thermo Plastics

Answer 1

. Monomer (single) Polymer chain (no cross links)
. Recycable 5 PP
Properties
. Reshape/mould
. Reuse/recycle
. Range of colours
. Range of sizes
. Self finishing

Question 2

Drape moulding and Vacuum forming

Answer 2

Drape moulding:
. Thermo plastic is heated
. Draped over a mould
. Limited to simple size

Vacuum forming
. Thermo plastic is heated
. The mould is pressured into the plastic
. A vacuum is created and the mould is formed.

Question 3

Line bending > Strip heating (Thermo plastic)

Answer 3

. Heat Thermo plastic along a straightedge
. Bend along heated section
. Only bend 1 direction.

Question 4

Oak

Answer 4

. Hard to work with
. Durable 
. Long grain 
. Strong 
. Very attractive again 

Uses:
. High class furniture
. Veneer

Question 5

Beech

Answer 5

. Durable 
. FCC regulated
. Non abrassive
. Very short again
. Practically knot free

Uses:
. Kitchen equipment
. Toys
. Furniture

Question 6

ABS (Thermo)

Answer 6

. Impact resistant
. Tough
. Many colours 
. Shiny 
. Expensive 

Uses:
. Lego bricks
. Mobile phones

Question 7

PET (Thermo)

Answer 7

. Hard 
. Stiff
. Strong
. Can be colourless 
. Cloudy when thicker, very brittle and crinkles

Uses
. Bottles

Question 8

Compression moulding (Thermo setting plastic)

Answer 8

Pressure/hear > Liquid Thermo set urea formaldehyde

Question 9

Scots pine

Answer 9

. Very fast to grow
. Easy to with
. Very knotty
. Yellow in colour

Uses:
. Main use is construction trade.

Question 10

Softwood

Answer 10

. Evergreen 
. Coniferous 
. Needles not leaves 
. Germanite using pin cones 
. Fast growing
. FSC Regulated

Question 11

Hardwood

Answer 11

. Deciduous 
. Loose their leaves in autumn/winter
. Broad leaves
. Have fruit and nuts
. Some are FSC regulated

Question 12

Douglas fir

Answer 12

. Soft
. Durable
. Easy to work with
. Machines well

Uses:
. Indoor furniture
. Flooring
. Internal layer of plywood

Question 13

Spruce

Answer 13

. Not very durable
. Full of small knots
. Light creamy colour
. Fast growing

Uses:
. Indoor furniture
. Acoustic guitars

Question 14

Conversion

Answer 14

. Transforming logs into planks or boards

||| < through and through (slab) 
# < quarter sawn

Question 15

Seasoning

Answer 15

. Drying wood for suitable purposes 
Green timber 
. Air dry 20%
. 6 months/year shed 
> 
EMC
. Equillibrium moisture content 
. Dowel 
. Plank
. PSE
. Kiln dry 10%
. 2-5 days auto clave

Question 16

Melamine Formalehyde

Answer 16

. Stuff
. Hard
. Strong
. Resist some chemicals and stains

USES
. Laminates for work surfaces
. Electrical insulation
. Table ware

Question 17

Urea Formaldehyde

Answer 17

. Stuff
. Hard 
. Strong
. Brittle
. Good electrical insulator 

USES:
. Electrical fittings 
. Handles 
. Control knobs 
. Adhesives

Question 18

Blow moulding (Thermo-plastic)

Answer 18

( ) < Hollow mould
( | ) < Liquid plastic
() < Air forced

Question 19

Injection moulding

Answer 19

. Creates solids
. Mobile phone cases/toy
. Granules>Hopper>Heater>Screw thread

Question 20

Polypropylene

Answer 20

. Light
. Hard
. Tough
. Flexible 
. Chemical resistance
. Scratches easily

USES:
. Most plastic objects
. School chairs
. Sandwich boxes

Question 21

Acrylic (Thermo)

Answer 21

. Stiff
. Hard 
. Durable
. Good electrical insulator 
. Machines 
. Polishes well
. Scratches easily 
. Brittle in small sections

Uses: 
. Signs
. Covers of storage boxes
. Headlight lens 
. Shop signs

Question 22

Teak

Answer 22

. Tropical wood 
. Naturally oily/resistant to moisture
. Strong
. Durable 
. Golden brown in colour

Uses:
. Outdoor furniture
. Boat building
. Laboratory tables

Question 23

Mahogany

Answer 23

. Tropical wood
. Very expensive 
. Reddish brown in colour 
. Strong 
. Easy to work with 

Uses:
. High class furniture
. Veneer

Question 24

Polyester resin (Plastic component of GRP)

Answer 24

``` . Stiff . Hard . Brittle unless laminated . Good electrical insulator . Resists chemicals ``` Uses: . Casting and encapsulation . Bonding of the materials

Question 25

Thermo set plastics

Answer 25

. Monomer/polymer chain linked . Does not reshape . Non recycable . Non flammable

Question 26

Plywood #

Answer 26

``` . Can be more expensive than solid wood Aeroply: . 0.8-1.5mm in thickness very expensive Flexiply: . 3 layers-top and bottom thin veneer middle softer to create curves ```

Question 27

Man-made board

Answer 27

``` . All use waste wood to be produced . Formaldehyde glue is used in all of these boards MDF: . Moulds . Made from wood dust ``` Chipboard . Cheap furniture . Needs to be laminated