Friends of the chemical industry, although you are particularly versed in the chemical products you sell, but you know more about the packaging knowledge that is closely 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 such an article that is so easy to understand and extremely unfathomable about chemical packaging.
This article is still written in terms of the packaging of granular, powdery solid-state chemicals. Otherwise, the span 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. Please be forgiven for the place and look forward to seeing you fill in the axe. Where there is text, there is advertising, so this article involves the ingredients of advertising, please also understand!
First, according to the weight 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 a barrel and a tank is not much to say. Here, we specifically talk about the paper barrel. In the strict sense of the paper barrel, we need to have no metal on the whole body. There is a circle on the upper and lower ends of the traditional paper barrel. Metal rings, so when you export products with paper drums, be sure to confirm with 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 expert friends, she supplied the characteristics of 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, single material, composite materials on the classification.
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 the 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. Mouyi牟13735311590. 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 anti-ultraviolet, antistatic and other reagents.
Regarding 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 the food, the third largest supermarket bag packing 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 of the chemical industry;
The fifth type of packaging PP: polypropylene. If snakeskin bags (woven bags) are used for cheap products such as rice fertilizers;
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 pocket after packaging the material is cigarette packs. The bag is characterized by automatic sealing after filling the material, in addition there are square bottom opening pockets, M folding valve pockets;
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 after being glued. Bags, in the packaging line, called back envelopes. There are also three-side seals on some aluminum foil bags.
Fourth, classify the seals on the bags.
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, do not seal 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 blending into the product.
Fifth, classification from printing.
1. The trademark, product name and contact information of the printing company. In the design must be done simple and generous, I have designed a packaging layout for many companies, so in this regard also have some experience.
2, neutral packaging. Only print simple information such as product name, net weight, and precautions, and must not print the manufacturer's contact information, trademarks, company names, etc., or simply print nothing, blank bags. This type of packaging is mainly for the sake of considering the interests of middlemen. This is also what many manufacturers have to do. To survive, it is not their wish to wear less clothes or not to wear clothes.
3, according to customer requirements specified layout printing (OEM). In this regard, specifically to the business and packaging colleagues to say a few words, we must prevent this kind of printing is infringement, so we must request the client's written authorization, and expressly caused by the responsibility of the customer.
4, privately counterfeiting other people's trademark wheat head, congratulations, you have become a qualified enemy of the people!
Sixth, with the packaging closest partner: tray, wrapping film (heat shrink film).
The size of the outer packaging of most export products must be designed around the size of the trays and containers. After being wrapped in a good tray, it can be wrapped in a film or heat shrinkable film, which can also play a beautiful, reinforced, anti-dust effect. Some customers use large cartons on pallets and 25 kg/bag in cartons.
There are also many ways to stack pallets. After combining the factors such as product bulk density, pallet size, and container, there is only one most reasonable way. The rationality here is mainly to load more goods in a limited container space and products. The firmness of the code on the tray. For this reason, the Deaf had worked on the size of the client and wringed his brain, but later recovered to recover.
VII. Packaging of dangerous chemicals.
The categories of goods are divided into: dangerous goods and general goods. General goods are mainly divided into: food (drug) and non-food (drug) products.
You need to find a suitable qualified packaging supplier to provide services for you based on the characteristics of your product.
Eight, packaging function classification.
The original function of packaging is to hold the product. Later, it gradually developed to: moisture, rust, shock, charge (nitrogen for more) gas, pumping (vacuum), anti-counterfeiting and so on. The newer types of packaging are: inflatable bags that avoid the tilting of goods in containers; plastic bags for pure water, which are used to replace the current plastic barrels of bottled water.
Nine, packaging and counterfeiting.
When we were drinking Coke, we found that the bottom of the bottle cap was always detached from a circle of plastic. This was an irreversible effect after the basic breakage of the package. If this circle of plastic broke but was attached to the bottle cap, this was Because the material of the bottle cap and the bottle body is different, it is convenient for recycling the bottle and the bottle body. This circle of plastic is attached to the bottle cap, which fully reflects these small companies' environmental protection business. The bottle body must be recycled. The bottle cap must also be recycled. This small circle must also be recycled with the bottle cap. This detail is also reflected in the ring pull of Wong Lo Kat's cans.
For this reason, when you use packaging, especially when you need to go through distributors in your domestic sales, your product's packaging must have this most basic—unrecoverable after breakage. In the past few years, a well-known chemical plant in China used the bottom valve pockets, and as a result, the brokers were artificially tampered with, or pulled out several kilograms of products from the valve ports. Trouble. The time for forcible infusion of knowledge is reached - the valve ports of square-bottom valve pockets are divided into three types: ordinary valve ports, flanged valve ports, and extended valve ports. The first two valve ports do not require any seam after filling the material. Lines or heat seals are naturally sealed, and the last can be used to heat seal.
Suture packaging, such as PP woven bags, paper and plastic bags, there are also counterfeiting. Therefore, after some paper and plastic bags are stitched, the glue sticks a layer of paper to the stitches, which is anti-counterfeiting and moisture proof.
Tenth, packaging and environmental protection.
In the ninth paragraph, the word environmental protection is also mentioned. Environmental protection is also divided into absolute environmental protection and relative environmental protection. The real environmental protection is not to use packaging, but this is a matter of primitive times and has become ancient. I simply talk about relatively environmentally friendly packaging materials, that is, the packaging materials used are relatively single, rather than a combination of multiple materials together bags, such as: PE bags, paper bags. Packages made of two materials (non-tight composites) are environmentally friendly if they are easily separated.
Eleventh, advertising time is up.
The packaging bag that I work in is M-fold LDPE (high-pressure low-density polyethylene). This bag belongs to the international fourth-class environmental protection packaging material and is suitable for packaging granular and powdery chemical products for export as a new type of packaging.牟13735311590 Our company's representative clients in China's land include: DuPont, BASF, etc. In China, those huge ethylene plants that have been put into operation in the last two years or that will be put into operation recently, such as BP Secco, Huizhou Shell, Maoming Petrochemical, etc., have used the bags extensively and extensively.
You may have imported in many