Unbreakable crockery and dinnerware: which polymer system is commonly used?

Introduction / Context:
“Unbreakable” crockery typically refers to hard, glossy, heat-resistant dinnerware that resists staining and maintains shape at serving temperatures. This points to thermoset networks rather than ordinary thermoplastics.

Given Data / Assumptions:

• Desirable traits: hardness, heat resistance, scratch resistance, low porosity.
• Melamine–formaldehyde (MF) resins form highly crosslinked, durable surfaces.
• Thermoplastics may soften or deform under heat.

Concept / Approach:
MF resins cure to glassy, crosslinked networks with excellent surface hardness and sanitary properties, making them ideal for tableware and laminates. The term “unbreakable” is colloquial; MF is still breakable, but far more durable than many thermoplastics in service.

Step-by-Step Solution:
Match property requirements with resin families.Recognise melamine–formaldehyde as the standard dinnerware resin.Select the MF option.

Verification / Alternative check:
Commercial products and standards list MF dinnerware due to heat resistance and ease of cleaning.

Why Other Options Are Wrong:
Generic “thermoplastic” and “addition polymers” are too broad and often lack the heat resistance and hardness required.“None of these” contradicts established practice.

Common Pitfalls:
Confusing MF with urea–formaldehyde; the latter is less moisture-resistant and not preferred for dinnerware.

Final Answer:
Melamine (melamine–formaldehyde thermoset)