Module 2. Thermo Softening polymers Flashcards
What is a Thermo Softening Polymer?
Thermosoftening of (thermoplastics) a polymer that can be heated and re moulded into a different shape.
Name some examples of thermo softening polymers
epoxy
nylon
Teflon
poly yester
polypropylene
what are the characteristics of thermoplastics?
They are easily fabricated, can be injected into a mold, it is easily drawn into fibres and can be melted and remolded.
how do the thermoplastics stay containers in air bags.
They are:
. pedals
. pullers
. dashboards
What are Engineering textiles?
are polymers that are drawn into threads and then woven into cloth like sheets.
They are synthetic polymers (fake) that offer vast improvements over natural fibres.
Common example of Engineering textiles?
Polyester
used in tyres, and other various car parts like engine belts, radiator horses and door seals
what are the parts in a injection moulding schematic?
the parts are:
1. Screw ramp
2. Feed hopper
3. Noddle
4. Fixed mould
5. Product
6. Movable mould
What is extrusion in the context of thermoplastics?
manufacturing process used to create objects of a fixed cross-sectional profile. The material is melted and pushed through a die to form a shape that can be continuously long and in various profiles like pipes, tubing, sheets, and films.
What are the advantages and disadvantages of the extrusion processes?
pros: versatility recyclability, energy efficiency in manufacturing, and cost-effectiveness for large-scale production.
cons: material limitations, high start up costs & Surface Finish Quality
What is injection moulding?
Injection moulding is a manufacturing process used to produce complex and detailed parts by injecting molten material into a mould. It is widely used for mass-producing plastic parts across various industries due to its efficiency and versatility.
What is blow moulding?
Blow moulding is a manufacturing process used to create hollow plastic parts by inflating a hot, molten tube of plastic into a mould cavity. It is commonly used for making bottles, containers, and other hollow shapes in large quantities.
