CRIMP IN FABRIC
DEPARTMENT OF TEXTILE ENGINEERING
ASSIGNMENT ON
TEXTILE TESTING & QUALITY CONTROL- II
Course code: TE-901
Chapter No : 01
Chapter Name : Crimp in Yarn and Fabric.
Submitted to:
Engr. Mr. Md. Solaiman
Lecturer
Department of Textile Engineering
Submitted by:
Group –A
1.
2.
3.
4.
5.
6.
7.
8.
9.
Md. Salim Reza
Abul Hasan
Md. Shajedul Islam
Aysah Akter
Md. Touhid Rana
Sayduzzaman Sayed
Jubayer Ahmed
Sharmi Dhaly
Jasmin Akhter
Roll-198
Roll-193
Roll-199
Roll-190
Roll-204
Roll-212
Roll-188
Roll-183
Roll-215
Date of Submission: - 31-08-2013
Chapter no: 01
Chapter name: - Crimp in Yarn and Fabric.
Contents
1. What is crimp, crimp percentage, take up %, and crimp ratio?
2. Relation between crimp% and take-up %?
3. Difference between crimp% and take-up %
4. Describe the importance of crimp on fabric properties?
5. Measurement of crimp%
6. Explain the WIRA crimp tester
7. Calculate the reed width required giving a cloth with a loom state width of 38 inch & crimp is 6%.
2
Crimp in Yarn and Fabric
Crimp: When warp and weft yarn interlace in fabric they follow a wavy path.
According to pierce “crimp”, geometrically considered is the percentage excess of length of the yarn axis over the cloth length.
Crimp%: Crimp percentage is defined as the mean difference between the straightened thread length and the distance between the ends of the thread while in cloth which is expressed as a percentage. Mathematically,
Crimp %
Where,
l= Length of yarn before weaving
P= Length or extent of yarn in fabric after weaving
Crimp amplitude: In cloth geometry, the term crimp amplitude is used.
Crimp amplitude refers to the extent to which threads are defected from the central place of the cloth.
Take up%: Take up % or crimp rigidity is a measure of the ability of a textured yarn to recover from stretch. It is related to the bulking properties of yarn.
The difference between lengths of yarn in the fabric
ASSIGNMENT ON
TEXTILE TESTING & QUALITY CONTROL- II
Course code: TE-901
Chapter No : 01
Chapter Name : Crimp in Yarn and Fabric.
Submitted to:
Engr. Mr. Md. Solaiman
Lecturer
Department of Textile Engineering
Submitted by:
Group –A
1.
2.
3.
4.
5.
6.
7.
8.
9.
Md. Salim Reza
Abul Hasan
Md. Shajedul Islam
Aysah Akter
Md. Touhid Rana
Sayduzzaman Sayed
Jubayer Ahmed
Sharmi Dhaly
Jasmin Akhter
Roll-198
Roll-193
Roll-199
Roll-190
Roll-204
Roll-212
Roll-188
Roll-183
Roll-215
Date of Submission: - 31-08-2013
Chapter no: 01
Chapter name: - Crimp in Yarn and Fabric.
Contents
1. What is crimp, crimp percentage, take up %, and crimp ratio?
2. Relation between crimp% and take-up %?
3. Difference between crimp% and take-up %
4. Describe the importance of crimp on fabric properties?
5. Measurement of crimp%
6. Explain the WIRA crimp tester
7. Calculate the reed width required giving a cloth with a loom state width of 38 inch & crimp is 6%.
2
Crimp in Yarn and Fabric
Crimp: When warp and weft yarn interlace in fabric they follow a wavy path.
According to pierce “crimp”, geometrically considered is the percentage excess of length of the yarn axis over the cloth length.
Crimp%: Crimp percentage is defined as the mean difference between the straightened thread length and the distance between the ends of the thread while in cloth which is expressed as a percentage. Mathematically,
Crimp %
Where,
l= Length of yarn before weaving
P= Length or extent of yarn in fabric after weaving
Crimp amplitude: In cloth geometry, the term crimp amplitude is used.
Crimp amplitude refers to the extent to which threads are defected from the central place of the cloth.
Take up%: Take up % or crimp rigidity is a measure of the ability of a textured yarn to recover from stretch. It is related to the bulking properties of yarn.
The difference between lengths of yarn in the fabric