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101.

About Hdpe?

Answer»

Shrinkage 3-4%. Main FEATURES of HDFE are high density, rigidity, strength, hardness and chemical RESISTANCE. Examples are MILK bottle crates, fish BOXES etc.

Shrinkage 3-4%. Main features of HDFE are high density, rigidity, strength, hardness and chemical resistance. Examples are milk bottle crates, fish boxes etc.

102.

About Ca ?

Answer»

Shrinkage 0.3-0.8%. Its MAIN PROPERTIES are transparency and SURFACE texture. Examples are TOOL handle, goggles, TV screens.

Shrinkage 0.3-0.8%. Its main properties are transparency and surface texture. Examples are Tool handle, goggles, TV screens.

103.

About Abs?

Answer»

Shrinkage 0.5%. It is heat resistant, provides good insulation and exhibit electrical properties. Examples are general purpose safety HELMETS, pipe FITTINGS, TELEVISION, RADIO etc.

Shrinkage 0.5%. It is heat resistant, provides good insulation and exhibit electrical properties. Examples are general purpose safety helmets, pipe fittings, television, radio etc.

104.

What Is Mfi?

Answer»

FLOW capacity of DIFFERENT grades of thermoplastics are inversely PROPORTIONAL to MOLECULAR weight.

Flow capacity of different grades of thermoplastics are inversely proportional to molecular weight.

105.

Teflon Is The Trade Name Of ?

Answer»

PTFE

PTFE

106.

Delrin Is The Trade Name Of?

Answer»

POM

POM

107.

Nylon Is The Trade Name Of ?

Answer»

PA

PA

108.

Perspex Is The Trade Name Of ?

Answer»

CA

CA

109.

Give Example Of Thermoplastics?

Answer»

ABS, PP, CA, PMMA, PS, PC, POM ETC.

ABS, PP, CA, PMMA, PS, PC, POM etc.

110.

Difference Between Thermo Set And Thermo Plastics?

Answer»

Thermoplastics:

  • Can be re softened and REUSED
  • No chemical changes during heating.
  • In GRANULAR form
  • Needle structure 
  • Hard but not brittle

Thermo set PLASTICS:

  • Cannot be re softened and reused
  • Chemical changes during heating etc.
  • In powder form
  • CROSS LINKED structure 
  • Hard and brittle

Thermoplastics:

Thermo set plastics:

111.

Types Of Plastics Based On Chemical Behavior?

Answer»

112.

How To Classify The Plastics?

Answer»

113.

Explain The Disadvantages Of Plastics?

Answer»

114.

What Are The Advantages Of Plastics Over Metals?

Answer»

115.

What Is The Important Characteristics Of Plastics?

Answer»

It can be MOLDED into FINISHED product by APPLICATION of HEAT and PRESSURE.

It can be molded into finished product by application of heat and pressure.