the names and their roles of primary sizing ingredients are given below:
this is untreated starch powder. Mainly maize starch, sago starch, wheat starch, potato starch are used as adhesive agent in sizing. The viscosity of sizing liquor with untreated starch is always high. It gives poor penetration in the warp yarn. This starch is suitable for sizing of coarse count of yarn up to 20s count.
it is chemically treated starch. It has lower viscosity than untreated starch. It easily penetrates in the yarn. When warp count increases, the size pick-up percentage is also increased thus concentration of liquor is also increases but viscosity of liquor is kept almost same by using thin boiling starch. It may be successfully used in the sizing of medium count of warp yarn. It is little expensive than untreated starch.
it chemically modified starch. It has very low viscosity. It gives the best penetration effect in the yarn. It is suitable for all types yarn count. It can be used for sizing of warp of high speed loom. Good quality of fabric results with this adhesive. Maximum efficiency can be achieved by using this adhesive. This is much expensive so that it is used in the sizing of fine count of warp yarn only.
The secondary sizing ingredients of sizing agents are given below: