Inferior PC polycarbonate sheet are divided into the following categories:
1. PC polycarbonate sheet produced with polycarbonate reclaimed material and recycled materials
The polycarbonate sheet produced with PC reheating material and PC recycled material has broken the chemical bonds between the molecules, the network molecular arrangement between the molecules and the molecules, and the physical properties of the board are also destroyed, so PC The physical properties of the board are also destroyed, and the impact resistance of the polycarbonate sheet is also destroyed. Therefore, the PC sheet produced from the recycled material has poor impact resistance and is easy to break (for example: when screwing, the drilling is easy to break and return the material. The hollow polycarbonate sheet produced not only has poor impact resistance, but also has poor transparency and yellowing of the board surface.
As the picture shows
2. Use PC brand new material to produce polycarbonate sheet without adding anti-UV agent
In the production process, we did use PC brand-new materials to produce polycarbonate panels, but they did not add anti-UV agents or add anti-UV coatings during the production process according to the requirements of the process, so that the PC polycarbonate sheet produced In the first 1-2 years of early use, the physical and chemical properties of the sheet will not change much, but in the next 3-5 years, the internal chemical and physical properties of the sheet will change drastically. The main reason is that the ultraviolet (UV) part of the light accelerates the aging of the polycarbonate plastic sheet, which causes the performance of the polycarbonate sheet to drop sharply (the main visual manifestations are: yellowing, brittleness, shrinkage, and cracks on the surface. , The upper and lower surfaces are covered by the oxidizing substances produced after air oxidation) Therefore, the hollow polycarbonate sheet used outdoors must strictly follow the process requirements, add anti-ultraviolet UV coating on the surface of the PC sheet, and add anti-ultraviolet rays to the PC sheet substrate In order to ensure the service life of the PC solid sheet, in areas with strong ultraviolet radiation, such as Algeria, Saudi Arabia, Pakistan,Brazil, Philippines, Malaysia, Indonesia, it is necessary to customize the production of polycarbonate sheet according to the local annual average sunshine time and sunshine intensity (mainly setting Thickness and concentration of UV coating on PC sheet)
3. No raw materials suitable for the production of PC polycarbonate sheet extrusion process have been selected
The processing of plastic sheet products is divided into: 1, extrusion 2, injection molding 3, dripping 4, pouring 5, calendering, etc. The standards for selecting materials for each process are completely different, and the polycarbonate should be selected according to the field of product application and production process.Extrusion-grade polycarbonate raw materials are the most expensive of all grades of raw materials, and extrusion-grade raw materials are subdivided according to application fields. Therefore, when selecting raw materials for PC sheet production, they should be selected based on the properties of the raw materials rather than the price.
4. Use non-polycarbonate materials to produce (such as: acrylic PMMA, PS sheet, PP sheet, etc.)
Acrylic PMMA, PS sheet, PP sheet, etc. are inherently not weather resistant. If they need to have anti-aging, impact resistance and other properties, they need to be modified by plastics. However, because acrylic PMMA, PS sheet, PP sheet and other raw materials are cheap, some manufacturers Or dealers use acrylic PMMA, PS sheet, PP sheet and other products to impersonate PC sheets to mislead consumers and cause great market harm.
Company Name: Baoding Xinhai Plastic Sheet Co.,ltd
Contact Person: Sale Manager
Email: admin@cnxhpcsheet.com
Phone: +8617713273609
Country: China
Website: https://www.xhplasticsheet.com/
Post time: Dec-20-2021