Plastic recycling news
We are one of the cheap quality PP pellets suppliers from Singapore. Our company is providing PP pellets white with the high quality and the best price as well as the good service for your company.
Specification of PP pellets white
- MFI-18-20 (2.16 kg)g/10min
- Raw material: White paint bucket
- CATEGORY: PP
- TYPE : pellets
- GRADE/ COLOR : white
- QUANTITY : 50 MT
- LOADING WEIGHT: 25 MT
Polypropylene (PP) is one of the most commonly used thermoplastics in the world. Polypropylene is used in a variety of ways from plastic packaging, plastic parts for machinery and even yarn and textiles. It is a hard semi-crystalline thermoplastic, first polymerized in 1951 and widely used today in a wide range of domestic and industrial applications. Today, the global demand for polypropylene is estimated at around 45 tons and this number continues to grow exponentially. ( See more: PP Blowing Grade )
Use for polypropylene
- Polypropylene has a smooth, tactile surface, ideal for plastic tables and chairs
- low friction applications, such as gears in machinery and vehicles.
- It is highly resistant to chemical corrosion, making it a great choice for packaging
It has a well-deserved reputation for hardness and durability because of its exceptional fatigue resistance and flexibility. In its fibrous form, the uses of polypropylene are not limited to being useful not only for tote bags but also include a wide variety of other products, including ropes, twine, duct tape, carpets, upholstery, pants vests and camping equipment. Its waterproof properties make it particularly effective for the marine sector. In the various industries, polypropylene is also widely used, for example in battery cases, beverage trays and containers, bumpers, interior details, appliance panels and door trim.( See more: PP Film Grade )
Finally, the medical world also appreciates polypropylene's water-repellent properties, as well as its flexible strength, and resistance to mildew, bacteria, and chemical corrosion. It can be cleaned well and can withstand steam sterilization methods. Some medical applications include:
- Medical vials
- Petri dish
- Medicine box
- Sample bottle
Material properties and types of polypropylene
This versatile thermoplastic and polymer is very popular due to its high flexibility, lighter density, and adaptability to a wide range of fabrication techniques. The different variations in polypropylene have led to the material being called the 'steel' of the plastics industry, as it can be used and manipulated in a number of ways.( See more: PP Injection Grade )
There are two main types of polypropylene thermoplastics:
Homopolymers contain only propylene monomers in semi-crystalline form. Major applications include textiles, packaging, ductwork, medical components, and electrical applications.
Copolymers are divided into random copolymers and block copolymers, which are made by polymerizing propene and ethylene together. Copolymers contain higher amounts of ethylene, resulting in an increase in desirable properties in polypropylene. They are softer than homopolymers but have better impact strength.
Polypropylene PP can act as a thermoplastic and fiber. This allows for a wide range of uses. It can be used as a fiber, such as in the manufacture of promotional tote bags and 'bags for life' shopping firms. It is soft, malleable, and has a relatively low melting point, making it easy to use in the injection molding process, where it is supplied in pellet form. It also flows well, due to its low melt viscosity.
Advantages of Polypropylene
Due to the fact that polypropylene adapts well to the injection molding process, it can be used to create extremely thin layers of plastic. It is well suited for applications such as
- Hinge on medicine pot,
- Shampoo bottle cap
- And other containers shall be subjected to extensive bending and manipulation and shall not break.
Disadvantages of polypropylene
A major disadvantage when it comes to the broader environment and conservation of global resources is the fact that polypropylene is not easy to recycle. When it burns, it creates an irreversible chemical change. If you try to re-heat polypropylene that has been melted and formed, it will simply burn rather than liquefy a second time. Other recycling or reconditioning methods must be considered, at a significantly higher cost.( See more: PP Jumbo Bag Grade )
This low melting point also means that polypropylene is highly flammable and has limited tolerance to higher temperatures, and it is also more susceptible to UV degradation and oxidation. Finally, while polypropylene's glossy finish makes it aesthetically pleasing and easy to handle, this precise property also makes it harder to bond to other surfaces and materials, such as paint and glue. Alternative bonding methods, such as welding, must be used when polypropylene is used for joints or hinges.