The design of the heavy corrugated box can not only prevent the package from being wet by water, but also prevent the box itself from being wet by water. In order to prevent moisture, usually can be solved with waterproof agent. Therefore, according to the role of waterproof agent, the production method of moisture-proof carton can be divided into: temporary waterproof treatment and long-term waterproof treatment.

临时防水剂：瓦楞纸板在生产过程中经过临时防水剂处理后，具有临时防水功能。当水在短时间内落在上面时，它不会弄湿，而是变成水滴，从而防止水渗透到纸板中。

Temporary waterproof agent: corrugated board has temporary waterproof function after being treated with temporary waterproof agent in the production process. When water falls on it in a short period of time, it will not get wet, but become water droplets, thus preventing water from penetrating into the cardboard.

涂层在早期用于织物纤维，然后用于纸板加工。所以瓦楞纸箱工厂大多用脱水剂这个名字。水萃取剂为蜡乳液，固含量通常为48%-51%。其特征在于使用时可用30倍左右的水稀释，然后涂在成型的瓦楞纸箱表面。在150℃左右的温度下干燥后，纸张表面的纤维由于被醋包裹而具有较的表面张力，从而形成了不被水润湿的表层。

Coatings were used in the early days for fabric fibers and then for paperboard processing. So most corrugated box factories use the name of dehydrating agent. The water extractant is wax emulsion, and its solid content is usually 48%-51%. The utility model is characterized in that it can be diluted with about 30 times water when in use, and then coated on the surface of the formed corrugated box. After drying at about 150 ℃, the fiber on the surface of the paper has a lower surface tension because it is wrapped by vinegar, thus forming a surface layer that is not wetted by water.

当它接触到水时，水不会在纸板上打湿，水滴会滚下来，从而实现防水。但蜡对纸纤维的附着力不好，尤其是水提液稀释30倍时，固含量只有1.5，只有很薄的一层纸表面纤维被蜡包裹。此外，由于蜡乳液中蜡的粒径通常比普通聚合物乳液大，很难渗透到纸纤维的深度，水萃取剂通常对一种水敏感。化学品，纸张表面通常很快。大米的破乳和沉淀，所以水萃取剂中的大多数蜡颗粒只存在于一层非常薄的纸上。

When it comes into contact with water, the water won't get wet on the paperboard, and the water drops will roll down to make it waterproof. But the adhesion of wax to paper fiber is not good, especially when the water extract is diluted 30 times, the solid content is only 1.5, only a very thin layer of paper surface fiber is wrapped by wax. In addition, because wax particles in wax emulsion are usually larger than ordinary polymer emulsions, it is difficult to penetrate into the depth of paper fibers. Water extractant is usually sensitive to a water. Chemicals, paper surfaces are usually fast. Because of the demulsification and precipitation of rice, most of the wax particles in the water extractant only exist on a very thin layer of paper.

瓦楞纸箱在外摩擦的作用下，蜡很容易被擦掉，露出无蜡纤维，从而大大降了防水效果。为了增强蜡对纸纤维的粘附性，水提取物中经常存在松香衍生物或羧基化聚合物乳液，它们对纸纤维具有良好的粘附性，并且与蜡具有良好的相容性。因此，它们的加入促进了蜡对纸纤维的粘附，如果蜡被改性，例如通过氧化和结构化，它具有类似的作用，并且蜡对纸纤维的粘附可以增加。

Corrugated box in the role of external friction, wax is easy to be wiped off, exposing non wax fiber, thus greatly reducing the waterproof effect. In order to enhance the adhesion of wax to paper fibers, rosin derivatives or carboxylated polymer emulsions are often found in aqueous extracts, which have good adhesion to paper fibers and have good compatibility with wax. Therefore, their addition promotes the adhesion of wax to paper fibers. If wax is modified, such as by oxidation and structure, it has a similar effect, and the adhesion of wax to paper fibers can be increased.
                              

但是小编还是需要提醒大家，除了这些措施，疏水剂在这个浓度下还是不是防水膜层，所以面对摩擦，比如加工过程中的纸箱，堆叠过程中的摩擦，防水面往往是没有用的。这就是为什么涂有防水剂的瓦楞纸箱被指定为临时防水剂的原因。目前，防水剂已在一些纸箱工厂广泛使用，并已成为基本工艺。

However, Xiaobian still needs to remind you that in addition to these measures, hydrophobic agent is not waterproof film at this concentration, so it is often useless to face friction, such as carton in processing, friction in stacking process and waterproof surface. This is why corrugated boxes coated with waterproofing agent are designated as temporary waterproofing agent. At present, waterproof agent has been widely used in some carton factories, and has become the basic technology.

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