In addition to protecting the package from being soaked by water, the moisture-proof production of heavy-duty packaging carton is mainly to prevent water from infiltrating the box itself. Because after the box is soaked in water, the compressive strength and bursting strength of the box will be greatly reduced, which will seriously affect the quality of packaging. Heavy duty packaging carton for moisture-proof production, usually using the method of coating waterproof agent to solve. Therefore, according to the role of waterproof agent, the production methods of moisture-proof carton can be divided into: temporary waterproof treatment and long-term waterproof treatment.

重型包裝紙箱在生產(chǎn)過程中采用暫時(shí)性防水劑處理后，具有暫時(shí)防水功能。按照J(rèn)ISZ1537—的解釋：當(dāng)水短時(shí)間落于其上時(shí)，不沾濕而成水滴，能防止水浸透紙板。暫時(shí)性防水劑處理紙板工藝近十年來(lái)在我國(guó)各大紙箱廠均已應(yīng)用。這種防水劑當(dāng)初從日本引進(jìn)，其日文字面為“拔水劑”。

The heavy packing carton has the function of temporary waterproof after being treated with temporary waterproof agent in the production process. According to jisz1537 - explanation: when water falls on it for a short time, it will not get wet and become water drops, which can prevent water from soaking paperboard. In recent ten years, the technology of temporary waterproof agent treating paperboard has been applied in all major carton factories in China. This kind of waterproof agent was introduced from Japan at the beginning, and its Japanese literal is "water extracting agent".

這種涂料早期用于織物纖維上，后來(lái)才用于紙板的處理。因此大多樹紙箱廠就采用拔水劑的叫法。拔水劑是一種蠟乳液，固體含量一般為：48%～51%，它的特點(diǎn)是在使用時(shí)可用30 倍左右的水稀釋，然后涂布于正在成型的瓦楞紙板面上，經(jīng)過150℃左右的溫度干燥，紙表面纖維由于醋的包裹，而具有低表面張力，形成對(duì)水不浸潤(rùn)的面層。當(dāng)遇水時(shí)，水在這個(gè)紙板上不浸潤(rùn)，形成水滴滾落，從而達(dá)到防水的作用。

This kind of coating was used on the fabric fibers in the early stage, and then used in the treatment of paperboard. Therefore, most of the tree carton factory uses the name of water extraction agent. Water extraction agent is a kind of wax emulsion, solid content is generally 48% to 51%, its biggest feature is that it can be diluted about 30 times water when used, and then coated on the corrugated board surface. After 150 degrees Celsius drying, the surface of the paper is wrapped with vinegar and has low surface tension to form a surface layer which does not infiltrate water. When meeting water, water does not infiltrate on this paperboard, forming water drops to roll down, so as to achieve the function of waterproof.

但是，蠟對(duì)紙纖維的附著力并不好，特別是當(dāng)拔水劑被稀釋了30 倍以后，其固含量只有1.5～，紙表面纖維只有很薄一層被蠟包裹。另外由于蠟乳液中蠟的粒徑一般都比通常的高分子乳液粒徑大，要往紙纖維深處滲透也難，同時(shí)拔水劑一般對(duì)明礬一類化學(xué)品敏感，在紙表面往往很快破乳而沉淀下米，因此拔水劑中的蠟粒子絕大部分只在紙面上很薄的一層存在。在有外摩擦力的作用下，蠟容易被摩擦掉，露出無(wú)蠟包裹的纖維，防水效果大大降低。

However, the adhesion of wax to paper fiber is not good, especially when the extractant is diluted 30 times, its solid content is only 1.5 ~, and only a very thin layer of paper fiber is wrapped by wax. In addition, because wax particles in wax emulsion are generally larger than the size of ordinary polymer emulsion, it is difficult to infiltrate into the depths of paper fibers. At the same time, the water absorbent is generally sensitive to alum chemicals, and it often breaks down quickly on the surface of paper. Under the action of external friction, the wax is easy to be rubbed off, exposing the fiber wrapped without wax, and the waterproof effect is greatly reduced.

為了增強(qiáng)蠟對(duì)紙纖維的附著力，在拔水劑中往往有松香衍生物或羧化高分子乳液，它們既對(duì)紙纖維有很好的粘附力，與蠟又有wxafd003較好的相溶性。這樣，它們的加入可促進(jìn)蠟在紙纖維上的附著性，同時(shí)如果對(duì)蠟進(jìn)行改性，如將其氧化、基化，也有類似作用，都可以使蠟對(duì)紙纖維的附著力增加。

In order to enhance the adhesion of wax to paper fibers, there are often rosin derivatives or carboxylated polymer emulsions in the water extraction agent. They have good adhesion to paper fibers and better solubility with wax and wxafd003. In this way, their addition can promote the adhesion of wax on paper fiber. At the same time, if wax is modified, such as oxidation and basification, it also has a similar effect, which can increase the adhesion of wax on paper fiber.

但是必須指出的是，就是增加了這些措施，拔水劑在這樣的濃度下所形成的仍不是一個(gè)防水膜層，因此在遇到摩擦，如紙箱在搬運(yùn)、堆碼過程中遇摩擦，往往會(huì)使這一防水表面失去作用。這就是為什么把涂布拔水劑的這類紙箱定為暫時(shí)性防水紙箱。

However, it must be pointed out that even with the increase of these measures, the waterproof film formed by the extractant at such concentration is still not a waterproof layer. Therefore, in case of friction, such as friction in the process of carrying and stacking cartons, this waterproof surface will often lose its function. This is why the coating of such cartons as temporary waterproof cartons.

有了重型紙箱廠家上面的小總結(jié)，希望對(duì)廣大客戶有所幫助，如果有什么不理解的或者尋求幫助的請(qǐng)點(diǎn)擊我們的網(wǎng)站：http://www.jintouzixun.cn或者來(lái)電咨詢，我們會(huì)盡全力為您解決

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