Identification of Fibre | Fiber Identification | Identification ofThermoplastic Fibre

Name of the Experiment: Identification of given fibre sample .

Objects:
1. To know about the physical properties of sample fiber.
2. To know about the chemical properties of sample fiber.
3. To identify the type of sample fibre.
Visual properties:
Colour: White
Handle: Harsh

Physical test:

Preliminary sorting test by heating:
We took small tuft of fibres hold in forceps and brought it slowly up to but not into a small non-luminous flame. Then observe the condition:

Obs. no.	Behavior	Remark
1	Does not shrink from flame or melt	Non-thermoplastic

For non- thermoplastic fibre:
Bring a small tuft of fibres into a small non-luminous flame –

Obs. no.	Behavior	Remark
1	Burn with irregular spurting flame, leaving a black inflated, easily powdered residue & emits a smell of burnt hair.	Protein (Silk & Wool)

Chemical test:

Obs. no.	Chemical	Behavior		Remark
		Cold	Hot
1.	Phenol	Unchanged	Unchanged
2.	Dimethyl formamide	Unchanged	Unchanged
3.	Sulphuric acid	Unchanged	Dissolve	May be silk
4.	Sodium hydroxide	Unchanged	Dissolve	May be wool

Confirmation test:

Obs. no.	Chemical	Behavior		Result
		Cold	Hot
1.	Sodium hydroxide	Unchanged	Dissolve	Wool

Visual properties:

Colour: White
Handle: Soft.

Physical test:

Preliminary sorting test by heating:
We took small tuft of fibres hold in forceps and brought it slowly up to but not into a small non-luminous flame. Then observe the condition:

Obs. no.	Behavior	Remark
1.	Shrink from flame or melts with the formation of bead	Thermoplastic

For thermoplastic fibre:
Bring a small tuft of fibres into a small non-luminous flame –

Obs. no.	Behavior	Odor	Residue	Remark
1.	Melts then burns (smoky flame)	Aromatic	Glossy brown bead (not crushable)	May be Polyester

Chemical test:

Obs. no.	Chemical	Behavior		Remark
		Cold	Hot
1.	Sulphuric acid	Unchange	Unchange
2.	Dimethyl formamide	Unchange	Unchange
3.	Phenol	Unchange	Dissolve	May be Polyester
4.	Sodium hydroxide	Unchange	Unchange

Confirmation test:

Obs. no.	Chemical	Behavior		Result
		Cold	Hot
1.	Phenol	Unchange	Dissolve	Polyester

Conclusion:
I would like to thank our respected teacher for the important instructions. I am also grateful to our lab assistants for their kind help. This experiment helps me to know about the fabric abrasion resistance and its measuring test that is very important for textile testing. I think this will be very helpful in my future life.