The issue with fertilizer packaging bags

Our company seals the inner bag separately, but it seems that the situation you mentioned can still occur. It has to be said that anti-caking agents are not a panacea; to prevent such issues, it is necessary to address the underlying causes, such as moisture, temperature, formulation, and crystallization properties

Are you referring to carbon ammonium packaging? The inner and outer bags of our ammonium carbonate packaging are separate, and a firm action is taken during packaging (to facilitate air release). Then vent the air and tie off the inner bag opening, and finally sew up the outer packaging. The urea packaging is similar to what you mentioned. (No lumps were seen either) :)

Our company has now made improvements and is using adhesive bags, with no distinction between inner and outer bags.

Could the person from Haiyou on the fourth floor please provide a detailed explanation of the bonding process? How can the device be improved? What are the procedures for operation? What bonding materials are used? Thank you!

Upon going to the site to take a look, it turned out to be an inner mucosal bag; the manufacturer of such bags presses and adheres the inner layer directly to the outer layer during production, giving it the appearance of a single layer.

The solution is to separate the inner and outer bags. . . The inner bag is sealed by hand. . . But the packaging speed is too slow. . . . .

The inner bag is sealed by hand; this approach is taken because the packaging speed is too slow. I wonder how to address this issue of slow speed? And does it mean we need to add one more operator?

First is the use of double-laminated bags, also known as mucosal bags. The method of separating the two inner bags from the outer bag must absolutely be avoided. Packaging a product is inherently a task that requires high speed and physical effort, which severely affects the quality and volume of production. Anyway, as long as it’s a double-layer bag. We reject them at the production stage. The clumping issue has little impact on packaging. The causes of caking are mainly addressed during the production process and in the formulation. Then there is the so-called pinhole issue. We use double-line folding packaging. But whether it’s dual-line or single-line, it doesn’t make much of a difference. There are numerous detailed reasons for caking. Also, if fertilizers with a nitrogen content higher than 20 are stored for several months. We’re going to get trouble with sales. . . The fund inventory can’t take it anymore. There’s no way around it when N is 28 or higher. It must be sold within two months. Generally, the inventory products of companies have low N levels and low impurity contents. .

I’m not sure whether what’s on the 9th floor is nitrate nitrogen or ammonia nitrogen; our highest N level is 31%, and that’s nitrate nitrogen! At present, the issue of caking should be manageable; the main concern is intense market competition and a poor market situation, which may lead to prolonged storage times and thus caking of the products, affecting their competitiveness in the market.

10th floor. Clumping is a major issue for customers, especially in the compound fertilizer industry… So it’s related to ammonium nitrogen. Urea tends to clump within compound fertilizers, and crystallization also contributes to this problem. Even the best anti-clumping agents don’t work very well for products with high nitrogen content over extended periods of time. Nitrate nitrogen shouldn’t pose any problems. But currently, ** is used in too small quantities. Of course, I’m not very familiar with market conditions either. Under appropriate conditions such as temperature, air humidity, crystallization patterns, formulation, anti-clumping measures, and moisture levels, it’s possible to store the product for a year; however, there’s no guarantee. The requirements are too stringent, and naturally, the cost is high as well. That’s why our managers usually push the sales team to handle these issues. Additionally, there are too many manufacturers of compound fertilizers these days, leading to fierce competition. Once the season ends, those who can’t sell their products use this as an excuse for returns. The products shouldn’t clump at all, nor should they scatter, and they certainly shouldn’t fail to dissolve once applied in the fields… I’m really worried about compound fertilizers now. Hehe….

Also, there are too many varieties of anti-caking agents, and there are no standards to verify their quality. As a result, under the same conditions, some products clump together while others do not. All are packaged in standard laminated bags, which can be manufactured by any bag production company.

Our fertilizer packaging uses separate inner and outer bags; the inner bag is tied up first before sealing. Clumping does occur sometimes, but with good fertilizer additives, it’s easy to loosen the mixture during handling by manual handling – in fact, farmers can simply shake the fertilizer bag a few times before applying it to loosen it. So, the key still lies with the additives.

Using a double-layer bag might be better.:)

The packaging process for double-layer bags is time-consuming; plastic-coated bags can be used, along with automatic sealing machines for packaging. The problem of clumping in fertilizers is mainly related to additives.

This post was last edited by Xiao Shoudong on 2012-5-19 at 19:16. The packaging bag is not the root cause; moisture absorption is just one aspect. It is also related to temperature, moisture, and the properties of the material. Add an anti-caking agent if necessary.

Packaging bags are being updated rapidly, but many fertilizer manufacturers still use a packaging method that involves separate inner and outer bags – this is a very outdated approach. A friend mentioned options such as bonding the inner bag or using double folding and double stitching; however, these methods likely fall far short of what the market requires. Nowadays, some manufacturers use composite outer bags along with an inner bag, and they also add moisture-proof stitching at the bottom.

If an adhesive inner bag is used, along with a folding machine, it is necessary to control the dimensions of the sealing line to ensure that the finished product does not absorb moisture or become compacted