Paper Sizing Agents – Roles and Significance
Surface sizing agents are materials that are applied to the surface of paper to improve its strength and printability. These agents work by creating a barrier on the surface of the paper that helps to protect it from moisture and other environmental factors. This barrier also helps to improve the surface strength of the paper, making it more resistant to tearing and other forms of damage.
Additionally, surface sizing agents can improve the printability of paper by creating a smoother and more uniform surface that is better suited for printing.
There are several different types of surface sizing agents that are commonly used in papermaking. Some of the most common include:
- Starches: Starches are natural polysaccharides that are derived from plants. They are commonly used as surface sizing agents because they are readily available and relatively inexpensive. Starches are also biodegradable, making them an environmentally friendly choice.
- Synthetic polymers: Synthetic polymers such as polyvinyl alcohol (PVA) and polyacrylamide (PAM) are also commonly used as surface sizing agents. These materials are known for their superior strength and durability, making them a popular choice for high-performance paper applications.
- Rosin: Rosin is a natural resin that is derived from pine trees. It is commonly used as a surface sizing agent in papermaking due to its ability to improve the strength and printability of paper.
- Casein: Casein is a protein that is derived from milk. It is used as a surface sizing agent in papermaking due to its ability to improve the strength and printability of paper.
- Alkyl ketene dimer (AKD): AKD is a synthetic wax that is used as a surface sizing agent in papermaking. It improves the strength and printability of paper.
The choice of surface sizing agent will depend on the specific application and the desired properties of the end product. Some paper manufacturers may use a combination of different surface sizing agents to achieve the desired properties.
In conclusion, Surface sizing agents are materials that are applied to the surface of paper to improve its strength and printability by creating a barrier on the surface of the paper that helps to protect it from moisture and other environmental factors. Starches, Synthetic polymers, Rosin, Casein and Alkyl ketene dimer (AKD) are some of the common surface sizing agents used in papermaking. The choice of surface sizing agent will depend on the specific application and the desired properties of the end product.
At Advance Chemicals we offer Sizing agents covering Fortified Rosin, AKD, and both cationic and Anionic Version of Surface Size Agent.
