Thermoplastigion
Thermoplastics
Bydd thermoplastigion yn meddalu ac yn toddi pan gânt eu gwresogi, a gellir eu hailgylchu.
| Byrfod | Enw Llawn | Symbol Ailgylchu | Cryfder | Gwendid | Cynhyrchu | Enghraifft |
|---|---|---|---|---|---|---|
| LDPE |
Polythen dwysedd isel 
|
|
Ysgafn Gwrthsefyll cemegau Rhad i’w gynhyrchu Tryleu |
Anhyblygedd isel | Mowldio cylchdro |
Bagiau plastig Teganau Pibelli nwy |
| HDPE |
Polythen dwysedd uchel 
|
|
Cryf iawn Hawdd ei lanhau Anystwyth iawn |
Drud i’w gynhyrchu |
Mowldio chwistrellu Allwthio |
Mewnosodiadau fests gwrthsefyll bwledi Cynwysyddion |
| PP |
Polypropylen 
|
|
Ddim yn amsugno dŵr Hawdd ei liwio Ysgafn Diogel i ddal bwyd |
Ddim yn hyblyg iawn Anystwyth |
Chwythfowldio Mowldio chwistrellu Mowldio cylchdro |
Blychau bwyd Tupperware y gellir eu hailddefnyddio Rhaff |
| PS |
Polystyren 
|
|
Rhad i’w gynhyrchu Ysgafn Arnofio Ynysu sŵn a gwres |
Di-liw Ddim yn gryf iawn |
Mowldio chwistrellu |
Pecynnu Cwpanau tafladwy Ewyn styro Ynysu |
| HIPS |
Polystyren Ardrawiad Uchel 
|
|
Ar gael mewn unrhyw liw Ysgafn Cryf |
Ddim mor wydn a pholymerau eraill |
Mowldio chwistrellu Ffurfio Gwactod Plygu llinell Mowldio gwasgu |
Teganau Pecynnu Leinin oergelloedd |
| uPVC |
Ultra Violet Stabilised Polyfinyl-clorid wedi’i Sefydlogi gydag Uwch Fioled 
|
|
Gwrthsefyll tywydd Gwydn Rhad Gellir ei liwio |
Llawer o lygredd o’i gynhyrchu |
Mowldio Allwthio Wedi disodli nifer o ddefnyddiau adeiladu traddodiadol megis coed. |
Fframiau ffenestri Pibelli Llenni cawod |
| PVC |
Polyfinyl-clorid 
|
|
Hyblyg Gellir ei liwio Gwrthsefyll cemegau |
Meddal Llawer o lygredd o’i gynhyrchu |
Mowldio cylchdro Allwthio |
Ynysu ceblau Peipiau rwber hyblyg |
Thermoplastic soften and melt when heated and can be recycled.
| Abbreviation | Full name | Recycling Symbol | Strength | Weakness | Manufacture | Example |
|---|---|---|---|---|---|---|
| LDPE |
Low density Polythene
|
|
Lightweight Resistant to chemicals Cheap to produce Translucent |
Low stiffness | Rotational moulding |
Plastic bags Toys Gas pipes |
| HDPE |
High density Polythene
|
|
Very strong Easy to clean Very stiff |
Expensive to produce |
Injection moulding Extrusion |
Bulletproof vest inserts Containers |
| PP |
Polypropylene
|
|
Does not absorb water Easy to colour Lightweight Food safe |
Not very flexible Stiff |
Blow moulding Injection moulding Rotational moulding |
Tupperware re-usable food boxes Rope |
| PS |
Polystyrene
|
|
Cheap to produce Lightweight Floats Insulates sound and heat |
Colourless Not very strong |
Injection moulding |
Packaging Disposable cups Styrofoam Insulation |
| HIPS |
High Impact Polystyrene
|
|
Available in any colours Light weight Strong |
Not as durable as other polymers |
Injection Moulding Vacuum Forming Line bending Press moulding |
Toys Packaging Fridge lining |
| uPVC |
Ultra Violet Stabilised Polyvinyl-chloride
|
|
Resistant to weather Durable Cheap Can be coloured |
High pollution from manufacture |
Extrusion Moulding Replaced many traditional building materials like wood. |
Window frames Pipes Shower curtains |
| PVC |
Polyvinyl-chloride
|
|
Flexible Can be coloured Chemical resistance |
Soft High pollution from manufacture |
Rotational moulding Extrusion |
Cable insulator Flexible hose |