1. What are PVC particles?
One common use of PVC is in a variety of consumer products such as children’s toys, medical tubing and certain types of clothing. In some countries, these items have been banned from production because the particles that can break off from them can cause severe health problems if broken down into small enough pieces. This problem occurs when these small particles are released into the environment through disposal or decomposition after long-term use or accidental breakage during manufacture.
The consumer products that are most often cited in the media as having PVC particles include teething rings, toys and some children’s shoes. The U.S toy industry banned the use of these particles in 2008, although it is still present in older products. Although 2012 legislation requires manufacturers to label all products containing PVC with this information, there has been no further regulation on its production or disposal since then.
2. What are PVC particles used for?
At present, plastics account for 91% of the cladding materials, of which PVC accounts for 80% of the plastics. Other information shows that in the United States, plastics account for 85% of the wire and cable industry covering materials, of which PVC accounts for 60% of the plastic. PVC particles is a chlorine-containing polymer with good flame retardant properties and various properties required for the production and use of cables, and it is one of the most widely used plastics in the world because of its low price.
The increasing awareness of environmental protection and the concept of sustainable development, there are many debates about the environmental pollution of plastics and whether PVC particles should be banned, but the production and use of PVC particles is increasing, especially in China.
The development of science and research has led to the development of many environmentally friendly PVC products, and wire and cable have also benefited from this, as evidenced by the rapid development of environmentally friendly PVC cable materials in recent years to support environmentally friendly PVC wire and cable.
User requirements for environmental protection of PVC wire and cable and the development of environmentally friendly PVC cable material When the cable material is prepared successfully, it is tested on ICP testing equipment with ROHS or REACH testing methods and standards, the content of heavy metals in all material components, DEHP, nonylphenol, PBBs and other banned and controlled substances, etc. Because the requirements for content standards are different in each country, the corresponding environmental protection standards are also different.
The test unit is generally measured by 10-6. The stabilizer for environmentally friendly cable materials is generally a calcium-zinc stabilizer. The most important thing for PVC cable materials to meet REACH standards is not to use DEHP and other 16 substances as plasticizers.
non-environmentally friendly cable materials generally use lead salts as stabilizers, which are restricted or banned by more and more countries because they contain heavy metals such as lead, chromium, cadmium, mercury, and barium, which can cause great damage to the environment and human health.
In the lower voltage (below 1 k V) lines and electrical equipment used in the wire and cable, the insulation and sheath are available PVC coating, while the medium and high voltage (more than 6 k V) wire and cable sheaths mostly use PVC particles coating.
3. what are the properties of PVC plastic?
PVC is an acronym for polyvinyl chloride. It is one of the most widely used plastics in America, so chances are you have come into contact with it on more than one occasion.
When pvc was first discovered, it had some very unique properties that made it ideal for many applications. PVC products offer great durability and flexibility while still maintaining their own shape without deforming or breaking easily. This makes pvc the perfect choice for almost any consumer product; however, PVC can be found almost anywhere! The uses of pvc range from medical equipment to tractors and PVC is also making waves across the entertainment industry(1).
PVC’s combination of properties makes pvc a popular material used in construction where it is used as a substitute for wood and as an additive material in concrete. PVC is also commonly found as piping or tubing materials(2), so pvc may be used in your home to bring water from the city’s main pipe to your faucet.
In terms of PVC manufacturing, PVC particles can be made using various different methods depending on what pvc product is being produced and the desired end result.
One method that pvc manufacturers use to create PVC pellets is high-temperature suspension polymerization, which creates small pvc particles that are then melted down and formed into PVC shape (3). Although this process requires higher temperatures than other types of PVC processing, because this method uses suspended PVC particles, pvc products made with this process are said to give pvc pipes better physical properties, making them more resistant to wear and tear.
Another pvc manufacturing method is free radical emulsion polymerization. This pvc manufacturing process uses suspension polymerization as well but instead of creating PVC pellets, they create pvc particles that remain suspended. These pvc particles are then further processed until a pvc resin and stabilizer mixture is created(4). Because of this additional processing, the pvc particles in this mixture have a higher molecular weight than those made by high-temperature suspension polymerization.
The last type of pvc particle production method we will mention is solution polymerization; however, most pvc manufacturers do not use this pvc manufacturing process because pvc made by solution polymerization has a lower molecular weight than pvc particles made via suspension free-radical emulsion polymerization(5).
When pvc is created using either suspension or free-radical emulsion polymerization, the PVC product that is created will have pvc particles that are an even smaller size. Once these PVC particles are collected they can then be molded into PVC shapes or used in other applications.