Water Based Coating Paper

Water-based coated paper is an environmentally friendly, non-toxic and degradable coated paper, which is widely used in packaging, printing and other industries. Its main feature is that it uses water-based paint for surface coating, does not use solvents, reduces the emission of harmful substances, meets modern environmental protection standards, and is widely used in food packaging, daily consumer goods packaging and other fields.

Raw material selection

The selection of raw materials for water-based coated paper is crucial, and usually includes the following:

Base paper: High-quality paper is usually selected, and common ones are wood pulp paper, recycled paper, etc. These papers must have good water absorption, strength and stability to ensure the adhesion of the coating and the service life of the paper.

Water-based paint: Water-based paint is a paint that uses water as a solvent and has low VOC (volatile organic compound) emissions. Its main components include water, resin, pigment and additives. Water-based paint is not only environmentally friendly, but also easy to operate and clean, and can provide a smooth and uniform surface coating.

Coating process

The coating process of water-based coated paper usually includes the following steps:

Coating: Apply the water-based paint evenly to the surface of the paper. This process is usually completed using a coating machine, and the thickness and uniformity of the coating directly affect the surface effect of the final product.

Drying: The coated paper needs to be dried to remove moisture. The control of drying temperature and time is crucial to ensure the stability and adhesion of the coating.

Calendering: After the coated paper is dried, it usually needs to be calendered to make the coating surface smooth and bright. The calendering process can improve the gloss and feel of the paper and enhance its visual effect.

Environmental standards

The environmental performance of water-based coated paper is one of its biggest advantages. Compared with traditional solvent-based coated paper, water-based coated paper produces almost no harmful gases during the production process, which meets strict environmental standards. The following are several common environmental standards:

Low VOC emissions: Water-based coatings have extremely low VOC emissions, which helps reduce air pollution and protect the production environment.

No harmful substances: Water-based coatings do not contain harmful solvents or heavy metals, ensuring that the final product meets food safety and environmental regulations.

Recyclability and degradability: The base paper and coating used in water-based coated paper have good recyclability and degradability, which is in line with the concept of sustainable development.

Coating quality control

In order to ensure the quality of water-based coated paper, strict quality control is required during the production process:

Coating uniformity: Ensure that the coating is evenly applied to avoid weak areas or uneven coating. This is achieved by adjusting the speed of the coating machine and the viscosity of the coating.

Adhesion test: Check the adhesion of the coating to the paper to ensure that the coating does not fall off during subsequent processing.

Surface flatness: Improve the flatness of the coating through processes such as calendering to avoid undesirable conditions such as wrinkles and bubbles.

Durability test: Test the water resistance, abrasion resistance and weather resistance of the coating to ensure that the paper can withstand various conditions in actual use.

Surface performance

The surface performance of water-based coated paper mainly includes the following aspects:

Gloss: Through a reasonable coating process, water-based coated paper can achieve a high gloss effect and enhance the visual appeal of the product.

Printability: Water-based coated paper has good printability, can provide clear and bright printing effects, and is widely used in high-quality printing and packaging.

Waterproofness: Although the water-based coating is generally waterproof, the specially formulated water-based coating can improve its waterproof ability, making it suitable for humid environments such as food packaging.

Friction resistance: After the surface of the coated paper is treated, it has good friction resistance, which can effectively avoid scratches during transportation and use.

Scope of use

The wide application range of water-based coated paper includes:

Food packaging: such as cake boxes, candy packaging, beverage bottle labels, etc. Water-based coated paper meets the hygiene requirements of food packaging and has good printability and moisture resistance.

Daily consumer goods packaging: including cosmetic boxes, perfume boxes, gift boxes, etc. Water-based coated paper has high gloss and printing effects, which can enhance the high-end feel and market competitiveness of the product.

Labels and wrapping paper: Water-based coated paper is often used for various labels and wrapping paper, with excellent printing effects and durability, suitable for long-term use.

Environmentally friendly packaging: Due to its degradability and recyclability, water-based coated paper has become an important choice for environmentally friendly packaging, especially for brands that focus on environmental protection and sustainable development.

As an environmentally friendly and healthy packaging material, water-based coated paper is widely used in the field of modern packaging. It not only meets environmental standards, but also has excellent surface properties and printability, making it an ideal choice for packaging of various products. With the increasingly stringent environmental regulations, the application of water-based coated paper will further increase, promoting the popularization and development of green packaging.