Synthetic description of functional paper coating properties

With the rapid development of economy, customers have higher and higher requirements for the packaging of products. Functional coatings are under such conditions and have promoted a technological innovation of coating materials for corrugated boxes in the United States. Today, China, which is aiming for a rapid economic development, further promotes the use of new functional coatings and strives to promote the development of the packaging industry.

The paper coatings currently shown have generally the following properties:

Waterproof paper coating

The traditional waterproof carton adopts waxing, and the paperboard after waxing will definitely affect the color of the paper. The gray style will not be so beautiful and will affect the final packaging style. In addition, waxing must increase the weight of the carton and affect the degree of recovery. The series of water-based paints not only has a low coating amount, but also does not substantially affect the reprintability and adhesion of the carton, making our carton beautiful and sturdy. Some of these waterproof coated papers can be made into water tanks, and goldfish can be kept for 7 days. The cartons are still strong and impermeable.

Corrugated Reinforced Coatings

This is a completely new field of application for waterborne paper coatings. In foreign countries, most corrugated cartons are single-ply, but at present in China, most cardboards use cardboard to increase the strength of cartons. With corrugated reinforcement coatings, the Fiber series in the United States uses special high-molecular polymers to act on the pulp fibers to strengthen the strength of the carton. We can not only use low-weight paper, but also reduce the number of paperboard turns. The degree of reinforcement of the corrugated reinforcement coating is related to the type of paper and the fiber properties.

Moisture-proof coating

Waterproof coatings prevent the penetration of water but often do not prevent the passage of water vapor. For food preservation, we not only require water barriers, but also prevent the penetration of water vapor. At present, the domestic use of Laminated paper is generally used for packaging. The use of Vaporcoat's moisture-proof coating not only simplifies the packaging paper production process, but also enables 100% recovery, reduces packaging costs, and is also more environmentally friendly. Exquisite fresh tea leaves are packaged with damp-proof paint so that the tea is still breathing in the bag. That is, paper is like the skin of our body.

Grease-resistant coatings

When we bought a pizza and got it into our hands, the oil stain on the box had penetrated and we had even found that the pizza had stuck to the box. When our carton is coated with oil-resistant paint, the pizza that the customer sees is completely different, fresh and complete, and extremely appetizing. Today, developed countries in Europe and America have long used grease-resistant coated paper for food packaging, such as packaging for meat, poultry and snacks, and chocolate.

Wear-resistant coatings

The wear-resistant paper coating is designed to reduce the friction of goods during transportation. In China, foams and similar products are generally used nowadays, especially in the home appliance industry. However, in addition to environmental issues, similar products must use a variety of materials at the same time for key manufacturers. The United States NomarTM series of wear-resistant coating, reducing the original hardness of the paper, the formation of a layer of a special coating structure on the surface of the paper to reduce the original paper and household appliances surface friction. Protect the surface of the home appliance intact. Of course, wear-resistant coatings far exceed these functions.

Special coating

The special coatings used today are the following: corrosion-resistant coatings, fire-retardant coatings, anti-static coatings, release coatings, etc.

Corrosion-resistant coatings, corrosion-resistant coatings are mainly used to protect steel, iron, copper and other metal parts products. After the US Rustban series is coated on the surface of the carton, it can effectively prevent the oxidation of the packaging metal, so that the packaged metal parts will not be rusted and tarnished. Many manufacturers can make the paper have anti-corrosion properties in accordance with the needs of customers, and prevent the leakage of oil stains on hardware accessories.

In fire retardant coatings, we all know that corrugated paper is a kind of flammable product. In some occasions, there are certain fire protection requirements for packaging materials. At this time, we can use fire retardant coatings. The US PyrobreakTMEX series of fire retardant coatings can effectively stop the coating in some cases. Carton burning. If the fireproof coating of paper can pass the test of ASTM-162, ASTME-84, TAPPI461 and NFPA30, it is considered as a coating suitable for production use.

Anti-static coating, in the packaging of some electronic components, generally have anti-static requirements, the current domestic packaging of these products is mainly used anti-static plastic bags, and then use cardboard boxes or plastic boxes for packaging and transportation. In terms of operation, there are many processes and the cost of packaging is relatively high. After the United States Staticban series anti-static coating is applied to the corrugated box, the surface of the carton has the function of conduction and electrolysis, which can effectively protect the electronic components from the harm caused by static electricity and other charges. Packaging electronic components in a carton or carton coated with anti-static coating can reduce the number of steps in the packaging process and at the same time reduce the cost of packaging materials.

In addition to being non-tacky, release coatings can also satisfy the storage of products such as asphalt and rubber, that is, they also satisfy heat resistance. The hot asphalt is poured into a paper bag coated with a paint from Michael's door release, and after it cools, it does not stick to the paper bag.

Reprinted from: China Coatings Online