Question 8 (Textile Technology & Fibre Science)
The ingredient that is NOT used in sizing formulations is
| (A) | Starch |
| (B) | Polyvinyl acetate |
| (C) | Polyvinyl alcohol |
| (D) | Polycarbonate |
[Show Answer]
Option D is correct.
Sizing formulation is the process of creating a solution or mixture that is applied to the surface of textile fibers to improve their properties, such as strength, abrasion resistance, and smoothness. The ingredients used in sizing formulation vary depending on the desired properties, but some common components include:
Starch: Starch is a natural polymer that is commonly used as a sizing agent. It provides strength and stability to the fibers and helps to prevent breakage during weaving.
Synthetic polymers: Synthetic polymers, such as PVA (polyvinyl alcohol), can also be used as sizing agents. They provide improved strength, abrasion resistance, and dimensional stability compared to starch.
Lubricants: Lubricants, such as waxes and oils, are added to the sizing solution to improve the ease of weaving and reduce friction between the fibers and the weaving equipment.
Antistatic agents: Antistatic agents, such as polyethylene glycol (PEG), are used to reduce static electricity in the fibers and prevent unwanted accumulation of lint or dust.
Dispersants: Dispersants are added to improve the uniformity of the sizing solution and ensure that the ingredients are evenly distributed on the fibers.
The exact composition of the sizing formulation will depend on the desired properties and the type of textile being produced. A skilled formulator will consider factors such as fiber type, end use, and processing conditions when developing the sizing mixture.