Discussion
Match the following polymer product with its most appropriate processing technique
| Polymer product | Processing technique |
|---|---|
| P. Bottle | 1. Extrusion |
| Q. Blister packaging | 2. Pultrusion |
| R. Reinforced electric poles | 3. Injection blow molding |
| S. Sewage pipes | 4. Thermoforming |
Answer: B
The match is P-3; Q-4; R-2; S-1.
- Bottles are hollow parts made by blow moulding, here injection blow moulding.
- Blister packs are formed from heated plastic sheet: thermoforming.
- Fibre-reinforced electric poles are long constant-section composite profiles: pultrusion, which pulls resin-wetted fibres through a heated die.
- Sewage pipes are continuous profiles: extrusion.
The other options assign pultrusion to bottles or sewage pipes, or extrusion to the reinforced poles, which need continuous fibre reinforcement that plain extrusion does not provide.
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