Ink Binder is one of the core components of ink, and its function runs through the manufacturing, printing process and performance of the final product of ink. The following are the main functions of ink binders and their importance analysis:
1. Disperse and carry pigments
As the carrier of pigment, the binder uniformly disperses solid pigment particles and stably suspends them in the system. Pigment itself cannot be directly attached to the substrate, and the binder wraps the pigment through its fluidity to form a stable colloid system, which ensures the color uniformity and printing consistency of the ink.
2. Determine the rheological properties of ink
The viscosity, thixotropy and fluidity of the binder directly affect the printability of the ink. For example:
Viscosity: It affects the transfer of ink. For example, offset printing ink needs high viscosity to prevent emulsification, while gravure printing ink needs low viscosity to adapt to high-speed printing.
Drying speed: the chemical properties of the binder (such as oxidative polymerization, volatilization or curing reaction) determine the drying mode of ink (such as photosensitive resin for UV curing).
3. Promote adhesion and film forming.
After drying, the binder forms a solid film, which firmly bonds the pigment to the surface of the substrate. Its components (such as resin, grease) should be compatible with printing materials (paper, plastic, metal, etc.), such as:
Plastic printing: vinyl chloride and other resins are needed to improve adhesion.
High temperature environment: heat-resistant resin (such as phenolic resin) is needed to avoid cracking of the film.
4. Adjust printability and durability
Glossy: The binder with high resin content can improve the gloss of printed matter.
Weather resistance: The addition of acrylic resin can enhance the anti-ultraviolet ability and is suitable for outdoor packaging.
Abrasion resistance: the film-forming strength of the binder affects the friction resistance of the printed matter (for example, the banknote ink needs to be modified with epoxy resin).
5. Environmental protection and safety functions
Modern binders tend to be water-based or plant-based (such as soybean oil) to reduce VOCs emissions. UV-curing binder can reduce pollution by solvent-free formula.
tag
Ink binder is the "skeleton" of ink performance, and its composition design needs to take into account printing process, substrate characteristics and terminal requirements. From traditional mineral oil to environment-friendly resin, the innovation of binder directly promotes the sustainable development of printing technology.Ink binder is one of the core components of ink, and its function runs through the manufacturing, printing process and performance of the final product of ink. The following are the main functions of ink binders and their importance analysis:
1. Disperse and carry pigments
As the carrier of pigment, the binder uniformly disperses solid pigment particles and stably suspends them in the system. Pigment itself cannot be directly attached to the substrate, and the binder wraps the pigment through its fluidity to form a stable colloid system, which ensures the color uniformity and printing consistency of the ink.
2. Determine the rheological properties of ink
The viscosity, thixotropy and fluidity of the binder directly affect the printability of the ink. For example:
Viscosity: It affects the transfer of ink. For example, offset printing ink needs high viscosity to prevent emulsification, while gravure printing ink needs low viscosity to adapt to high-speed printing.
Drying speed: the chemical properties of the binder (such as oxidative polymerization, volatilization or curing reaction) determine the drying mode of ink (such as photosensitive resin for UV curing).
3. Promote adhesion and film forming.
After drying, the binder forms a solid film, which firmly bonds the pigment to the surface of the substrate. Its components (such as resin, grease) should be compatible with printing materials (paper, plastic, metal, etc.), such as:
Plastic printing: vinyl chloride and other resins are needed to improve adhesion.
High temperature environment: heat-resistant resin (such as phenolic resin) is needed to avoid cracking of the film.
4. Adjust printability and durability
Glossy: The binder with high resin content can improve the gloss of printed matter.
Weather resistance: The addition of acrylic resin can enhance the anti-ultraviolet ability and is suitable for outdoor packaging.
Abrasion resistance: the film-forming strength of the binder affects the friction resistance of the printed matter (for example, the banknote ink needs to be modified with epoxy resin).
5. Environmental protection and safety functions
Modern binders tend to be water-based or plant-based (such as soybean oil) to reduce VOCs emissions. UV-curing binder can reduce pollution by solvent-free formula.
tag
Ink binder is the "skeleton" of ink performance, and its composition design needs to take into account printing process, substrate characteristics and terminal requirements. From traditional mineral oil to environment-friendly resin, the innovation of binder directly promotes the sustainable development of printing technology.
