Sizing is the treatment of paper or fabrics with a solution to fill pores and set the surface. In the textile industry, starch is used to size the warp yarns, which are subject to high tension during weaving, thereby increasing their strength and amount. This sizing can be readily removed with desizing agents during the bleaching and dyeing in processing plants.
Benefits of Sizing:
To achieve the required number of ends on the weaver beam.
Enhance the tensile strength of the yarns.
Increase the weight of the yarns.
Reduce yarn hairiness.
The smoother the surface of the yarn, the better its overall finish and quality.
The Required Properties for size material:
This should be easily removable.
- It should possess adhesive qualities.
- It must not be harmful.
- Must have antistatic qualities.
- Must be flexible.
- After application, it should demonstrate a good drying capacity.
- This shouldn’t change the fabric’s hue or colour.
- It should be affordable and easily accessible.
- The yarn must not deteriorate or sustain damage.
- it should be simple to remove.
The Ingredients Needed For Sizing Recipe:
- Starch (050500): Low viscosity, high penetration, suitable for fine yarn counts.
- Starch (030700): High viscosity, used for coating, suitable for coarser yarn counts.
- PVA Elvanol.
- Galtex.
- ACR-140 (Acrylic).
- Textile Wax AW-190.
The Machines Used For The Sizing Process:
There is an extensive list of machines available for sizing; however, two of the most renowned for this purpose are Benninger and Karl Mayer. We will provide a detailed comparison of the functions of these machines to facilitate a better understanding of their components and operations.
sizing Cylinders
The Cylinders comparison of Benninger and Karl Mayer Sizing machine:
| Sr. No | Cylinder Type | Benninger | Karl Mayer | Karl Mayer (pro size) |
| 1 | Mini drying cylinders | 4 | 4 | Nill |
| 2 | Drying cylinders | 14 | 14 | 20 |
| 3 | Pre-wet return | 2 | 2 | Nill |
| 4 | Pre-wet exit | 2 | 2 | Nill |
| 5 | Immersion | 2 | 4 | Showering |
| 6 | Lateral lower and upper squeezing | 4 | 4 |