Foamed plastic is a type of plastic obtained by physically or chemically producing a microcellular structure inside the plastic. This kind of plastic has the advantages of light weight, heat insulation, buffering, insulation, anti-corrosion and low price. Almost all thermosetting and thermoplastic plastics can be made into foamed plastics. Common foamed plastics are polystyrene, polyurethane, and polyolefin.
Comparison of the three major foamed plastics
Introduction to Foamed Polypropylene
Foamed polypropylene is a foamed plastic prepared from polypropylene as the base resin. Compared with commonly used foamed plastics, foamed polypropylene has many advantages.
Foamed polypropylene raw material
Since the lower melt strength of ordinary polypropylene cannot guarantee the tensile stress on the cell walls when the bubbles grow, the polypropylene for foaming needs to use high melt strength polypropylene (HMSPP).
Methods to improve the melt strength of polypropylene include physical blending and chemical modification.
At present, the manufacturers of high melt strength polypropylene raw materials include Basell, Borealis, Dow Chemical, Samsung, Exxon Mobil, etc. The manufacturers with polypropylene foaming technology include JSP, Kaneka and BASF, Berstorff Company. Many domestic research institutes have carried out a lot of research on foaming technology, and some manufacturers have realized industrial production, such as Zhenhai Refinery, Yanshan Petrochemical Resin Research Institute, Wuhan Futiya, but there is still a big gap between product quality and foreign countries. .
Production process of foamed polypropylene
There are three main preparation processes: high melt strength polypropylene foaming, cross-linked polypropylene foaming, and blending system foaming process.
The key to the preparation of foamed polypropylene
Foamed polypropylene products have good performance and application prospects, but technical development is difficult. The key technology of polypropylene foaming process is to control the foaming stability and foaming ratio of polypropylene by adjusting the process temperature.
Application fields of foamed polypropylene
1. Food packaging
Foamed polypropylene has good degradability and good oil resistance, which makes it have obvious advantages over refractory expanded polystyrene meals in the disposable packaging market.
2. Thermal insulation
Foamed polypropylene material is a new type of thermal insulation material with strong temperature resistance. It can usually withstand a temperature range of -40 to 110 °C, and can withstand a high temperature of 130 °C in a short period of time.
3. Automotive industry
In recent years, the application of foamed polypropylene material in the automotive industry has been expanding, which can greatly reduce the weight of the car and save fuel consumption.
4. Construction field
Waterproof protection material, floor cushioning material, exterior wall insulation material
5. Electronic Packaging
6. Buffer packaging
7. Sporting Goods
The main manufacturers of foamed polypropylene
Foamed polypropylene products have good performance and application prospects, but technical development is very difficult. At present, there are no related industrialized products in China. The core technology is mainly in the hands of JSP and KANEKA.
Post time: Jun-09-2022