The document describes a crimp rigidity tester used to measure the crimp of texturized yarns. It has a hank winder, tensioner, capstan, and weights to apply loads to yarn strands. The test method involves winding yarn into a hank, applying weights, immersing in water for 2 minutes, then removing weights and measuring change in hank length to calculate crimp rigidity. The tester is compact, portable, and can test polyamide and polyester yarns with heating for hot crimp contraction measurements.

1. Presented by
Subrata Kumar Sarker
ID:151014002
Department of textile engineering

2. My Presentation Topic Is
Crimp Interchange
It contains:
What is crimp
Different type of crimp
Crimp Rigidity Tester Method working procedure

3. The crimp is defined as one less than the ratio of
the yarn’s actual length to the length of the fabric
it traverses.
Crimp levels influence fiber volume fraction,
thickness of the fabric, and mechanical
performance of fabric

6. Feature of Crimp Rigidity Tester:
• The instrument is based on test method.
• The tester can be used for both polyamide and
polyester texturized yarns.
• Instrument mounted on a sturdy metal base.
Compact and portable.
• Heating arrangement for measurement of hot
Crimp contraction

7. Specification :
Swift Perimeter : 1.10 Meter
Number of leas made at a time : 1
Counter (Mechanical Five Digits Reset able) : Connected with
Geared Motor
Overall Dimensions of the Unit : 550±5 (L), 220±5 (W),
495±5mm (H)
Net Weight of the Unit : 7.300 Kg.
Overall Dimensions of the Glass : ID 102±0.5 mm, OD
116.3±0.5mm
Net Weight of the Glass : 3.230 Kg.
Cone Stand : 750 ± 5mm (H).
Geared Motor (12v DC) : 25 RPM

8. The test method used as follow
o Place the package of yarn to be tested on the stud of the base
plate of the hank winder in the apparatus below the yarn guide.
o Thread the yarn through the gate tensioner and adjust the tension
until, on pulling the yarn through the gate; it can be observed that
the crimp is getting removed.
o Clamp the leading end of the yarn to the inner side of the capstan.
Wind a hank of yarn with a number of strands chosen so that loads
of 0.09 g/dtex and 0.0018 g/dtex can be applied to each strand by
means of the sets of hooked weights provided. (The loads and No.
of strands for yarns most commonly encountered are listed in the
Table given in BIS Handbook.) Clamp the final strand to the outside
of the capstan.
o Add appropriate lightweight to the strands extending across the
prongs of the fork at the lower end of the arm of the hank winder.
Add appropriate heavy weight to the lower hook of the lightweight.

9. o Remove the hank and the suspended weight by unscrewing
the hank bar from the arm of the winder.
o Attach the extra clip support to the hank bar and immerse the
hank in the water contained in the measuring cylinder by clipping
the two supports over the rim of the cylinder.
o Start the stop watch.
o Just prior to 2 min from immersing the hank, measure the length
of hank as L0.
o At 2 min from the time of immersion remove the heavy weight by
raising the grid, causing the weight to be released from S-shaped
hook.
o After a further 2 min. measure the length of hank as Ls.
o Crimp Rigidity = L0 - Ls / L0 x 100