Types of plastic ton bags
The main raw material for foreign production is polyethylene (PE), while domestic production is mainly polypropylene (PP), which is a thermoplastic resin made by polymerization of ethylene. In industry, it also includes copolymers of ethylene and a small amount of α-olefin. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance (low Z, the use temperature can reach -70～-100℃), good chemical stability, and can withstand most acids and alkalis (not resistant to oxidation) Nature acid), insoluble in general solvents at room temperature, low water absorption, excellent electrical insulation properties; but polyethylene is very sensitive to environmental stress (chemical and mechanical effects), and has poor heat aging resistance. The properties of polyethylene vary from species to species, mainly depending on the molecular structure and density. Different production methods can be used to obtain products with different densities (0.91～0.96g/cm3). Polyethylene can be processed by general thermoplastic molding methods (see plastic processing). It has a wide range of uses, mainly used to make films, containers, pipes, monofilaments, wires and cables, daily necessities, etc., and can be used as high-frequency insulating materials for televisions, radars, etc. With the development of petrochemical industry, polyethylene production has developed rapidly, and the output accounts for about 1/4 of the total output of plastics. In 1983, the total production capacity of polyethylene in the world was 24.65Mt, and the capacity of installations under construction was 3.16Mt.
Polypropylene (PP)
A thermoplastic resin made by the polymerization of propylene. There are three configurations of isotactic, random and syndiotactic. Industrial products are mainly composed of isotactic. Polypropylene also includes copolymers of propylene and a small amount of ethylene. Usually a translucent colorless solid, odorless and non-toxic. Due to the regular structure and high degree of crystallization, the melting point is as high as 167℃, heat resistance, and the product can be steam sterilized is its outstanding advantage. With a density of 0.90g/cm3, it is a lightweight general-purpose plastic. Corrosion resistance, tensile strength 30MPa, strength, rigidity and transparency are better than polyethylene. The disadvantage is that it has poor low temperature impact resistance and is easier to age, but it can be overcome by modification and addition of antioxidants.
Tons of bags are generally white or off-white in color, non-toxic and tasteless, and generally less harmful to human bodies. Although they are made of various chemical plastics, they are environmentally friendly and have greater recycling efforts;
Tonnage bags have a wide range of uses, mainly used for packaging and packaging of various items, and have a wide range of industrial applications;
Plastic ton bags are made of polypropylene resin as the main raw material, which is extruded and stretched into flat yarn, and then woven and bag made.
The composite plastic ton bag is made of plastic woven fabric as the base material and compounded by the casting method.
Used for packaging powdery or granular solid materials and flexible items. Composite plastic ton bags are divided into two-in-one bags and three-in-one bags according to the main material composition.
According to the sewing method, it can be divided into bottom bags with seams, bottom bags with seams, insert bags, and bonded sewing bags.
According to the effective width of the bag, it is divided into 450, 500, 550, 600, 650, 700mm, and the special specifications are negotiated by the supplier and the buyer.
Application range of plastic ton bags
Packing bag
1. Industrial and agricultural product packaging bags
Due to product resources and price issues, my country has 6 billion woven bags used for cement packaging every year, accounting for more than 85% of bulk cement packaging. With the development and application of flexible container bags, plastic container bags are widely used in marine and transportation Transport packaging industry and agricultural products. In agricultural product packaging, plastic ton bags have been widely used in aquatic product packaging, poultry feed packaging, covering materials for farms, shading for crop planting, windproof, hail-proof sheds and other materials. Common products: tons of feed Bags, chemical ton bags, putty powder ton bags, urea ton bags, vegetable mesh bags, fruit mesh bags, etc.
2. Food packaging bags
Food packaging such as rice, flour, etc. gradually adopts ton bags. Common ton bags are: ton bags of rice, ton bags of flour, and ton bags of corn.
3. Tourism and transportation industry
In the tourism industry, temporary tents, parasols, various travel bags, travel bags, all have plastic woven applications.Various tarpaulins are widely used as covering materials for transportation and storage, replacing the bulky cotton tarpaulins that are prone to mildew. Fences and nets in construction are also widely used in plastic woven fabrics. Common ones are: logistics bags, logistics packaging bags, freight bags, freight packaging bags, etc.
4. Engineering materials
Since the development of geotextiles in the 1980s, the application fields of plastic woven fabrics have been broadened, and they are widely used in small water conservancy, electric power, highways, railways, seaports, mining construction, and military engineering construction. In these projects, geosynthetics have filtration , Drainage, reinforcement, isolation, anti-seepage and other functions, plastic geotextile is a kind of synthetic geotextile.
