Friends of the chemical industry, although you are particularly versed in the chemical products you sell, but understand more about the packaging related to the chemical industry, I think in this ever-changing era, this is only good and no harm. If you are certain that Dionysian is not afraid of the deep iron law of the alley, then you can stop it when you see this. This text written by mouyi who has been in the chemical packaging field for many years! I dare to say that I was the first to publish an article that was so simple and easy to understand and that I did not retain the extremely ambiguous chemical packaging.
This article is still written in terms of the packaging of granular, powdery solid-state chemicals. Otherwise, it is too broad, and it cannot be accomplished by me. The writing time is also in a hurry, so it is not appropriate in the text. Thank you for your understanding, and I look forward to seeing you fill in. Where there is text, there is advertising, so this article involves the ingredients of advertising, please also understand!
First, according to the load classification of the packaging
1, 25 kg bag. The name is just a title, does not mean that any chemical product is 25 kg / packaging, the specific content of the packaging needs according to the characteristics of chemical products, customer habits and other factors to split. For example, calcium chloride products exported to the United States are usually 50 pounds (about 22.7 kilograms) per bag, which is mainly based on the measurement habits of the United States. In addition, in the white carbon industry, due to the extremely low product density, in order to avoid packaging The volume is too large, so it is customary to pack 10 kg/bag or 15 kg/bag. In some products, 50 kg/bag is also a common form of packaging.
In the packaging of pellets or powdered chemicals, the majority is still 25 kg/bag. For example: polyvinyl chloride, polyethylene, etc. Review of elementary school arithmetic time: 25 kg/bag * 40 bags = 1000 kg = 1 ton.
In the 25 kg category, there are also paper drums (boxes), plastic drums (cans), iron drums (cans), lead barrels, cloth bags, and so on. The difference between barrels and cans is not much to say. Here, I specifically talk about the barrels. In the strict sense of the barrel, I need to have no metal on the whole body. There is a circle in the upper and lower ends of the traditional traditional barrels. Metal rings, so when you export paper buckets, be sure to confirm it with your customers here!
2, special packaging and tons of bags. It is used to pack large bags of more than 100 kilograms, such as 400 kilograms, 500 kilograms, 750 kilograms, and 1,000 kilograms. The advantage of ton packaging is that it can save the cost of packaging; it is also convenient for customers when feeding. A typical industry is PTA, which uses tons of packaging. Because it needs to carry a lot of weight, so the material of the bag is PP polypropylene drawn woven, optionally added PE polyethylene liner bags. Thousands of kinds of tons of packaging are also thousands of species, I do not particularly understand, but I have a ton of packaging experts and friends, the characteristics of her tons of bags: the United States, expensive, large amount.
3, small-dose packaging: plastic bottles, glass bottles and so on. These are usually ML or G units, really small package. The literacy time is up to - the ML is the meaning of the ML, non-XX meaning.
4, tanker. This is already a huge package, usually loaded with liquid chemicals, and I'm not blind.
Second, the classification of single materials, composite materials
1, PP polypropylene, alias: snake skins, woven bags, polypropylene bags. In chemical fertilizers and the early ethylene industry, the most used, the bag's four major characteristics: very poor sealing, high strength, very low prices, the appearance of material in the form of extremely old fashioned. In practical use, the bag is usually lined with a PE bag (thickness ranging from 5 filaments to 10 filaments), and also coated with a layer of PE (BOPP) film on the outside (inner) to increase its sealing aesthetic performance. The units of square weight, Danny, 10*10, etc. are the unique parameters of this bag.
2. LDPE high pressure low density polyethylene.
When it comes to the bag, one must mention the single layer thickness unit of the film of the bag, first literacy: 18 filaments = 0.18 mm mm = 180 microns цm.
At present, ethylene producers that have been put into operation in the new domestic period have already used LDPE bags. Deaf people are specialized in the promotion and sales of the bags;
3, HDPE low-pressure high-density polyethylene. The most used place in the chemical industry is to act as a liner bag;
4, multi-layer paper. Titanium dioxide industry uses a lot of special, when used in paper mills, even with the package together with the whole package;
5, paper + PE composite bag, paper + PP woven composite bag, paper + aluminum foil bag composite bag. The former two are very much used in the chemical industry, such as ABS, PVC, etc.
6, BOPP + PP composite bags, such as rice, fertilizer bags, BOPP outer composite is characterized by printing can be infinitely beautiful;
7, paper + PE inner bag. Not a tight compound, just a PE bag inside the paper bag;
8, carton + PE inner bag. This is the most used in dyes, fragrances and other industries;
9, other: metal, PVC, BOPP, CPP, wood, straw rope and a variety of materials, such as interlaced composite;
10. According to the special requirements of customers, the bag body can be added with anti-ultraviolet, antistatic and other reagents.
As for the name of the packaged product described above, I also have an English name here. If you need it, please contact me.
Previously published international packaging material classification. Again posted here:
The first type of packaging PET: engineering plastic polyester. Mineral water bottles, delicious, Pepsi bottles, bottle caps do not belong to this material;
The second type of packaging HDPE: low-pressure high-density polyethylene. Can directly contact food, big supermarket vest bag
The third type of packaging PAPER: paper. Here refers to pure paper, not composite other materials;
The fourth type of packaging LDPE: high-pressure low-density polyethylene. At present, the packaging material of this material is a trend in the chemical industry;
The fifth type of packaging PP: polypropylene. If snakeskin bags (woven bags) are used for cheap products such as rice fertilizer;
Sixth Packaging PS: Polystyrene. Common in life is a white bubble film, and some microwave oven bowls;
The seventh type of packaging OTHER. All other packaging except the above 6 categories, including all composite packaging, such as paper and plastic bags
Third, the classification of packaging types
1, ordinary type. Commonly referred to as pillow bags, it is packed with materials.
2, M folding type. There are M-folding treatments on both sides of the bag body. More beautiful after packaging;
3, square bottom valve pocket type. The shape of the valve bag after packing the material is a cigarette box. The bag is characterized in that the material is automatically sealed after filling the material. In addition, there are square bottom opening bags and M folding valve bags;
The bag body of the above packaging bag is further divided into a barrel-shaped material and a sheet-like material, and the barrel-like shape refers to directly making a barrel-shaped bag after the film is blown and circularly knitted, and the sheet is glued into a bucket shape after being glued. Bags, in the packaging line, called back envelopes. There are also three-side seals on some aluminum foil bags.
Fourth, from the sealing bag packaging classification 1, sutures. The use of suture packaging: PP woven bags, paper and plastic bags, paper bags, etc.;
2, heat seal. The heat-sealed packaging includes PE bags, hot melt adhesive bags, aluminum foil bags, etc.
3, no sealing or self-styled pockets. There are: square bottom valve pockets;
4, paste type. This is a type of bag with double-sided tape on the bag mouth, which is rarely used.
In particular, when sewing bags, customers often encounter the situation that the thread mixes into the product, which affects the quality of the product. PP woven bags also have the possibility of PP silk blended into the product.