Size Take-Up% | Factors Affecting on Size Take-Up Percentage
What is Size Take-Up Percentage?
Size take-up percentage is the amount of sized materials added on the warp yarn surface, which is expressed as percentage.
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| Fig: Sizing machine used in weaving sector |
Size take-up (%) = (Weight of sized warp yarn – Weight of un-sized warp yarn)/ Weight of un-sized warp yarn × 100%.
Key Factors of Size Take-Up Percentage:
There are some key factors of size take-up percentage, which are pointed out in the below:
- Warp tension,
- Yarn characteristics,
- Wet ability,
- Nature of roller covering,
- Roller weight,
- Preparation condition,
- Yarn count or Linear density,
- Ends per inch (EPI),
- Fibre characteristics,
- Size concentration,
- Uniformity of yarn,
- Roller diameter,
- Running speed,
- Size ingredients.
All the above factors of size take-up percentage have explained in the following:
1. Warp tension:
If warp yarn tension is higher then size take-up percentage will be lower.
2. Yarn characteristics:
If yarn hairiness is higher then size take-up% will be higher but if yarn surface is rough then size take-up percentage will be increases.
3. Wet ability:
If wet ability is higher then size take-up% will be higher due to absorption.
4. Nature of roller covering:
If sized roller surface is soft and rough then size take-up% will be increased.
5. Roller weight:
If squeezing roller weight is higher then size take-up% will be lower due to penetration.
6. Preparation condition:
The shape of size ingredients or sizing materials should be uniform.
7. Yarn count or Linear density:
In case of finer yarn, size take-up% will be lower and in case of coarser yarn, size take-up percentage will be higher.
8. Ends per inch (EPI):
If ends per inch(EPI) is higher then size take-up% will be higher due to density of yarn in warp sheet.
9. Fibre characteristics:
In case of mature fibre, size take-up% will be lower due to small lumen and in case of immature fibre, size take-up percentage will be higher due to big lumen.
10. Size concentration:
If size concentration is higher then size take-up% will be higher.
11. Uniformity of yarn:
In case of uniform warp yarn, size take-up% will be lower and in case of un-uniform yarn, size take-up% will be higher.
12. Roller diameter:
If squeezing roller diameter is higher then size take-up% will be higher and vice-versa.
13. Running speed:
If running speed of machine is higher then size take-up percentage will be lower due to very short time for yarn penetration.
14. Size ingredients:
Size take-up percentage varies depending on the types of size ingredients.
