Corrugated cardboard box is made of corrugated cardboard for packaging transportation. The cardboard box is an indispensable packaging container. It has the characteristics of lightness, firmness, protection of goods, ease of loading unloading. Today, the main growth areas of corrugated boxes are in the food, beverage, tobacco alcohol, cosmetics, food service, mineral water other industries. , It has the characteristics of lightness, firmness, protection of goods, convenience for loading, unloading transportation. The main growth areas of corrugated boxes are food, beverage, tobacco alcohol, cosmetics, food service, mineral water other industries. Nowadays, the rapid development of e-commerce platforms enables agricultural products that used to be far away in remote mountainous areas, as well as seafood abroad the southern hemisphere, to be quickly delivered to your doorstep. In addition to the efforts of e-commerce platforms, sellers express personnel, cartons have assumed most of the packaging forms in the logistics market are one of the main packaging forms of logistics.

　　 However, the poor water moisture resistance of corrugated boxes has always been a defect that has been criticized by the market. Especially in recent years, the cold chain packaging market for chilled meat, fruits vegetables, medicines has become larger larger, the corrugated packaging industry urgently needs to fundamentally solve the problem of carton packaging that is easy to collapse after being damp. The following Baiyun Carton Factory will introduce the top ten solutions for corrugated carton production application:

1. Heavy sizing cardboard paper

In the cardboard papermaking process of the Suzhou carton manufacturer, the surface of the cardboard paper is heavily sized to ensure that the water droplets do penetrate the surface within 5 minutes. Usually in starch paste

Add a lot of water resistant additives, such as urea-formaldehyde resin, melamine-formaldehyde resin, polyvinyl butyral so on. However, the cost of the water-resistant agent is relatively high, it is easy to cause problems such as opening of the corrugated cardboard during the production of corrugated cardboard.

　　2, coated paper

　Laminated paper is a composite material that coats plastic particles on the surface of the paper through a casting machine. The main features are oil-proof, waterproof (relative), heat-sealing. However, due to the high cost, it is conducive to widespread use in the packaging industry.

　　3, water-proof corrugated cardboard

 is also called waterproof water-retaining corrugated cardboard. Its surface is almost impermeable if it is in contact with water for a long time, but it cannot be immersed in water, otherwise it will lose its waterproof performance. The curtain coating method is commonly used for water-shielding corrugated cardboard. The molten synthetic resin wax mixture is coated on the surface of the corrugated cardboard to form a layer of resin film wax film. If necessary, double-sided coating can also be carried out.

Water-shielding corrugated cardboard is mostly used for packaging salted products, frozen foods fruit vegetable products. Because the corrugated cardboard has a soft paraffin layer on the surface, it is also suitable for packaging high-gloss furniture, pianos, safes precision machines that are easy to scratch. .

　　4, surface-glazed corrugated box

Varnishing is a common process for post-printing processing of packaging products. After the surface of the product is coated, it can enhance the performance of the printed product, such as water resistance, light resistance, friction resistance, pollution resistance. At the same time, it can also increase the surface brightness of the product. The grade of the product is greatly improved. The glazing process of corrugated boxes is usually after the surface paper is pre-printed glazed, then the corrugated cardboard is laminated processed into a carton by die cutting. It can also be varnished directly on the surface of the corrugated cardboard, but the waterproof effect is good, it may also damage the compression resistance of the carton.

　　 5. Surface coated corrugated box

　　 Laminating is a process in which plastic films such as polypropylene are covered on the surface of the printed product, the adhesive is heated pressurized to bond them together. The film coating process is divided into two types: pre-coated film instant coated film. After the color box is coated, the surface is bright, resistant to friction, has a certain waterproof effect. The folded box is easy to crack. However, product recycling is difficult, countries such as the United States Europe have restricted their use.

　　6, aluminized kraft cardboard

Japan has developed pure iron foil with a thickness of 0.02mm~0.05mm, which is treated with galvanized, nickel tin antirust, extruded compounded with kraft paper polyethylene film to form a composite paperboard, which is used to make cartons, which is only waterproof moisture-proof , Can also shield electromagnetic waves, anti-static, especially suitable for the packaging of aquatic products, fruits vegetables, electronic meters, semiconductor devices electromechanical products. Aluminized PVC film kraft paper are combined to make a carton, which also has the functions of waterproof moisture-proof.

　　7, the carton vent hole is moisture-proof

　　 For products such as beer that are packaged with heat, a certain amount of hot steam formed in the box after packing may be absorbed by the carton, the compressive strength will decrease. In view of these situations, the usual practice is to punch two vent holes with a diameter of 18mm on the appropriate positions on the side labels of the carton.

　　8, corrugated paste added water-resistant agent carton

　　Kunshan carton manufacturers add an appropriate amount of high molecular polymer (also known as crosslinking agent bridging agent) to the starch binder during the production of corrugated cardboard. The high molecular polymer will replace the starch.

The hydroxyl group in the powder molecule makes the corrugated paste thread have a better waterproof moisture-proof effect. When the carton enters a cold storage humid environment, it can prevent the carton collapsing due to moisture absorption emulsification of the corrugated paste line. As for the frequently promoted products that can improve the bonding effect of cardboard improve the stability of bonding, it is a bit exaggerated.

　　9, water-resistant corrugated cardboard

　Corrugated paper whose strength is significantly reduced after being soaked in water for a long time is called water-resistant corrugated paper. There are two equipments processes for producing water-resistant corrugated cardboard, its processing principle is similar to that of dipping. Water-resistant corrugated cardboard can be used to measure its water resistance with instruments. The so-called water resistance is to immerse the corrugated cardboard in water (20±2℃ tap water) for 30mm, soak it for 1h, then test its burst resistance edge pressure strength. The residual strength should be less than 75% of the standard strength (before immersion). Water-resistant corrugated boxes are used to transport live fish, seafood a class of commodities with extremely high water content. However, such cartons are difficult to recycle, the EU has restricted their use.

　　10, hydrophobic corrugated cardboard

　refers to the process of coating low surface energy substances such as polylactic acid (PLA), polyolefin, polycarbonate, polyamide, polyester, molten paraffin on the surface of cardboard paper to change the surface roughness surface morphology of the material. When the hydrophobic corrugated cardboard is exposed to water, it forms a state of water droplets on the lotus leaf, the water turns into water droplets slides down without penetrating the interior of the cardboard. The cost is very low, it is suitable for packaging dry powdery items, especially powders that tend to agglomerate after absorbing water. It is also suitable for packaging commodities that often enter exit the cold storage, which is easy to condense on the wall of the box after being taken out of the cold storage. The hydrophobically processed cardboard will significantly reduce the compressive strength before the dew drops evaporate, can effectively protect the product. Suzhou carton customization