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Facilities

About the Laboratory

The Yarn and Fabric Quality Testing Laboratory, accredited by NABL, specializes in quality testing and grading jute and other natural fibers. Within its facilities are mechanical grading instruments such as bundle strength testers and airflow fineness meters, along with a Gravimetric fineness tester. Additionally, the laboratory is equipped with BIS approved digital grading instrument i.e., bundle strength testers, digital fineness testers, and color and lustre meters, ensuring accurate, reliable, and objective fiber analysis.  Further, there are also multifibre testing instruments. Through meticulous testing and precise measurements, the Fiber Testing Laboratory upholds industry standards, facilitates innovation, and fosters the development of high-quality fibers for a myriad of applications.

Mandate

§  Quality evaluation and grading of natural fibres using instrumental method

§  Calibration of instate developed mechanical as well as digital grading instruments

 

Nature of work

§  Conducting a range of tests to assess the quality, strength, fineness, and other essential characteristics of fibers.

§  Grading of jute fibre as per BIS standard (IS: 271 (2020), IS: 7032(1986))

 

Instruments and Equipment available

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Yarn linear density tester

The wrap reel test, also known as the skein or hank reel test, is a widely used method for measuring the length and calculating the count of a yarn. This test is commonly performed on spun yarns and is crucial for ensuring consistency and accuracy in yarn production.

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Yarn twist tester

A yarn twist tester determines the twist in a yarn by twisting a fixed length of the yarn until it kinks or unravels. The number of turns required to cause the kink or unravelling is measured and used to calculate the yarn's twist per unit length.

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Yarn hairiness tester

A yarn hairiness tester is a specialized instrument used to quantify the degree of hairiness in a yarn. Hairiness refers to the presence of short fibers, or "hairs," that protrude from the surface of the main yarn structure. A yarn hairiness tester measures the number and length of protruding fibers (hairs) from the surface of a yarn.

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Yarn evenness tester

A yarn evenness tester, also known as a yarn evenness testing machine or yarn imperfection tester, is a specialized device used to measure and quantify the irregularities or variations in the thickness and quality of a yarn.

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Instron universal testing machine

Yarn strength is measured commonly using Instron universal testing machine by pulling the yarn between the clamps and by measuring the breaking force.

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Fabric thickness tester

A fabric thickness tester typically employs a mechanical or electronic mechanism to measure the distance between two parallel plates or anvils under a specified pressure

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Porometer

Gurley Porosity test: The Gurley porosity test measures the time required for a specified volume of air to pass through a fabric sample under specific conditions. This method is particularly suitable for fabrics with relatively low air permeability.

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Air permeability tester

The air permeability test for fabric is conducted to measure the ease with which air can pass through a fabric. The test helps assess the fabric's porosity and its ability to allow air to pass through under controlled conditions.

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Digital bursting tester

Bursting strength is a mechanical property that measures the ability of a material, such as a non-woven fabric, to withstand pressure without bursting or breaking. The specimen is properly clamped and is the pressure of the fabric is gradually increased at a controlled rate until the fabric bursts or ruptures.

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Abrasion tester

The abrasion test for non-woven fabrics assesses the material's resistance to wear and abrasion under controlled conditions. This test is important for evaluating the fabric's durability, longevity, and ability to withstand friction and rubbing forces.

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Flammability tester

A flammability test for fabric is conducted to assess the material's response to ignition and its ability to propagate flames.

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Contact person:    

Dr. Sanjoy Debnath

Head of Department

Mechanical Processing Division

E-mail: sanjoy.debnath@icar.gov.in