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2. Hard hat - Wikipedia

   en.wikipedia.org/wiki/Hard_hat

   A hard hat is a type of helmet predominantly used in workplace environments such as industrial or construction sites to protect the head from injury due to falling objects, impact with other objects, debris, rain, and electric shock. Suspension bands inside the helmet spread the helmet's weight and the force of any impact over the top of the head.

3. Thermoplastic polyurethane - Wikipedia

   en.wikipedia.org/wiki/Thermoplastic_polyurethane

   Thermoplastic polyurethane. Thermoplastic polyurethane ( TPU) is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to oil, grease, and abrasion. Technically, they are thermoplastic elastomers consisting of linear segmented block copolymers composed of hard and soft segments.

4. Thermoplastic elastomer - Wikipedia

   en.wikipedia.org/wiki/Thermoplastic_elastomer

   Thermoplastic elastomer. Thermoplastic elastomers ( TPE ), sometimes referred to as thermoplastic rubbers ( TPR ), are a class of copolymers or a physical mix of polymers (usually a plastic and a rubber) that consist of materials with both thermoplastic and elastomeric properties. While most elastomers are thermosets, thermoplastics are not in ...

5. Thermoplastic - Wikipedia

   en.wikipedia.org/wiki/Thermoplastic

   A thermoplastic, or thermosoftening plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. [ 1][ 2] Most thermoplastics have a high molecular weight. The polymer chains associate by intermolecular forces, which weaken rapidly with increased temperature, yielding a ...

6. Firefighter's helmet - Wikipedia

   en.wikipedia.org/wiki/Firefighter's_helmet

   The original American fire helmet was created by a New York City luggage maker who was also a volunteer fireman in the 1830s, seeking a better design more tailored to the unique requirements for firefighting than the "stovepipe" "helmets" then in use. Stovepipe was essentially a top hat made of stiff leather with painted design to identify fire ...

7. Earmuffs - Wikipedia

   en.wikipedia.org/wiki/Earmuffs

   Earmuffs refer to two different items. Both items consist of a thermoplastic or metal head-band that fits over the top or back of the head, and a cushion or cup at each end to usually cover both ears. The cups can either be clothing accessories designed to cover a person's ears for warmth or personal protective equipment designed to cover a ...