DT January Exam Revision

Thermoplastics

Plastics that can be reheated and reshaped an infinite amount of times

TP - ABS Properties

High impact strength, lightweight and durable

TP - Acrylic Properties

Food-safe, tough and durable

TP - PP Properties

Lightweight, food-safe and good chemical resistance

TP - HIPS Properties

High mpact Polystyrene - Good impact resistance, lightweight and stiff

TP - LDPE Properties

Low density Polyethylene - Lightweight, low rigidity and good chemical resistance

TP - HDPE Properties

High density Polyethylene -Stiff and good chemical resistance

TP - ABS Common uses

Phone cases, helmets and toys

TP - Acrylic common uses

Car lights and illuminated signs

TP - PP Common uses

Food containers and medical equiment

TP - HIPS Common uses

Toys and fridge linings

TP - LDPE Common uses

Carrier bags, detergent bottles and toys

TP - HDPE Common uses

Crates, buckets and bowls

Thermosettings plastics

Plastics that once heated and shaped can't be remoulded. THey are permanently shaped and are incredibly heat resistant.

TSP - Epoxy Resin Properties

High strength and good chemical and wear resistance

TSP - Urea Formaldehyde

Rigid, hard, brittle and good insulator

TSP - Melamine Formaldehyde

Rigid, strong and scratch resistant

Natural Timber

Woods that are naturally grown i.e. from trees

Softwoods

Woods that have come from a Coniferous Trees. These trees are Evergreen and don't loose their leaves/ keep growing in Winter.

Hardwoods

Woods that come from Deciduous Trees. Loose their leaves and stop growing in winter. Start growing and produce fruit/flowers in Spring.

Man-Made Boards

Manufactured using woods and adhesives. Are not natural.

Ferrous Metal

Contain Iron and are magnetic and can rust

Non Ferrous Metal

Do Not contain Iron, are not magnetic and tarnish

Warp

when woods become deformed and twist due to moisture and air

Veneer

A thin slice of more expensive woods that is often applied to manufactured boards to improve appearance and give an impression of high cost

Laminate

Often used in flooring and furniture, where a printed layer is applied to a man-made board to make it look more appealing. Often topped with a clear protective coating.

Aesthetically Pleasing

When a product is highly appealing to the senses e.g. looks good, has a pleasant smell, etc

Knots

Small dark circles in natural woods where the branches of the tree have been growing

Alloy

Mixtures of 2 or more metals in order to gain the best properties from both

Ductile

The ability of materials to be drawn out/stretched without breaking

Malleable

The ability of a material to be compressed without breaking

MB - Plywood Properties

Very Strong, durable and won't warp

MB - Plywood Common uses

Furniture

MB - MDF Properties

Medium Density Fibreboard - Smooth and even surface, easy to machine and often veneered

MB - MDF Common uses

Patterns for Casting and furniture

MB - Chipboard Properties

Available in a range of densities and has a relatively even surface

MB - Chipboard Common uses

Furniture and flooring

HW - Oak Properties

Strong, hard but easy to work with

HW - Oak Common uses

High quality furniture, veneers and roof beams

HW - Mahogany Properties

Strong, durable and hard. Very aesthetically pleasing

HW - Mahogany Common uses

Indoor furniture, Veneers, Worktops and flooring

HW - Teak Properties

Durable, oily and resistant to moisture

HW - Teak Common uses

Outdoor furniture and boats

SW - Pine Properties

Light in colour, inexpensive, often contains knots and easy to machine

SW - Pine Common uses

DIY, school projects and simple joinery

SW - Spruce Properties

Soft texture and fairly lightweight

SW - Spruce Common uses

Musical instruments

Ferrous - Mild Steel Properties

Ductile, malleable and rusts quickly when exposed to moisture

Ferrous - Mild Steel Common uses

Nuts, Bolts and car bodies

Ferrous - Tool Steel Properties

Strong and hard

Ferrous - Tool Steel Common uses

Hand Tools and springs

Ferrous - Stainless Steel Properties

An alloy with chromium and nickel, doesn't rust and easy to sterilise

Ferrous - Stainless Steel Common uses

Kitchen utensils, surgical instruments and teapots

Non-Ferrous - Aluminium Properties

Lightweight, can be polished and malleable

Non-Ferrous - Copper Properties

Can turn green after being exposed to moisture, good conductor and malleable

Non-Ferrous - Tin Properties

Ductile and malleable and resistant to corrosion

Non-Ferrous - Aluminium Common uses

Cooking foil, saucepans and chocolate wrappers

Non-Ferrous - Copper Common uses

Plumbing and electrical components

Non-Ferrous - Tin Common uses

Coating on food cans and packaging

Duplex Board Properties

Water resistant and range of finished available to use on it

Foil-lined Board Properties

Foil helps with insulation and water resistant

Corrugated Board Properties

Strong, impact resistant and can be printed on