To Determine The Denier Of Given Man-Made Fibre By Gravimetric Method.

OBJECT:

            To determine the denier of given man-made fibre by gravimetric method.

Estimate the yarn count spinnable from this fibre.

INSTRUMENT/TOOLS:

            Glass slide, velvet pad, sartorious balance, steel scale etc.

WORKING PRINCIPLE:

            Man-made staple fibre length is measured against a scale on velvet pad. Measured fibre samples are weighed on a sartorious balance (about 100 fibres).

                The observed total length and weight is used to determine the count of samples (weight per unit length).

D = wt. of sample in gm.    x9000

Length of sample inmts

PROCEDURE:

•        Take slide and put a water drop on slide, gradually extract individual fibre from fibre bunch.

•        straighten the fibre on the slide.

•        Measure the fibre length with the help of steel scale by putting scale below the slide.

•        Put the measured fibres on clean velvet pad and repeat the process for100 fibres.

•        Collect the samples of individual fibres and weigh it on the sartorious balance.

RESULT:

Denier ……………………………………….

Length coefficient of variance % ………………………………………

PRECAUTIONS:

•        Make the slide and straightened the fibre carefully.

•        Measure the length carefully upto 0.5 mm accuracy.

•        Don’t loose fibre samples.

•        Weight the sample carefully.