The main business of Taihua plastics division is polystyrene (PS), ABS, ASA, San (styrene acrylic co polymer), polypropylene (PP), polycarbonate (PC) and so on Due to the active market expansion and the completion of the upstream raw material plants of Liuqing, the manufacturing and sales of PC / ABS and other comite adhesives have formed a strong integration between upstream and downstream. Looking forward to the future, the marketing of our products is expected to continue to grow. We hope that the company's products can provide reliable quality, stable material source and reasonable price of high-quality raw materials and technical support for China's plastic downstream processing industry, and jointly improve the overall situation To strive for the competitiveness of the industry.The production process of polypropylene has experienced several development stages, such as solvent method, solution method, liquid phase bulk method (including liquid phase gas phase combination type) and gas phase method. According to the classification, there are mainly the following categories: solvent method, solution method, liquid phase bulk method (including liquid phase gas phase combination formula) and gas phase methodPP的優點:PP雖然比回收PE有較高的機械強度和模量,但是像新PP樹脂一樣,回收PP的耐沖擊性能尤其是耐應力開裂性能差,且低溫性能差。這些性能特征是由PP聚集態結構和大分子鏈構造決定的,因此可用聚進行改性。回收PE(LDPE、HDPE)與收PP制共混物時,如果PP回收料比較多,可以直接制備合金,如在PP 中摻人10%一25%HDPE,其改性后的共混物在—20℃時落球沖擊強度比PP提高8倍以上,而且加工流動性增加,可適用于大型容器的成型。從結構上來說PE的加入破壞了PP的結晶如大球晶碎化,也降低了PP的結晶度;若在體系中再加入EPDM。約5%可提高PP與PE的相容性,強度得到提高;加入少量EPR橡膠也可提高材料的沖擊性能。There are tertiary carbon atoms in PP molecules, which are easily broken and degraded under the action of light and heat. PP without stabilizer will become brittle when heated at 150 ℃ for more than half an hour or exed to sunlight for 12 days. PP powder without stabilizer will degrade seriously and emit obvious acid taste when stored indoors for 4 months. Adding more than 0.2% antioxidant before PP powder granulation can effectively prevent degradation and aging of PP during processing and use. Antioxidants can be divided into two categories: free radical chain reaction Terminator (also known as the main antioxidant) and peroxide decomition agent (also known as auxiliary antioxidant). The reasonable combination of the main and auxiliary antioxidants will play a good synergistic effect. If PP is cooled slowly in the air after leaving the die, it will produce larger grains and the transparency of the product is lowPP的化學穩定性優異,對大多數酸、堿、鹽、氧化劑都顯惰性。例如在100℃的濃、、40%酸及其它們的鹽類溶液中都是穩定的,只有少數強氧化劑如等才可能使其出現變化。PP是非極性化合物,對極性溶劑十分穩定,如醇、、醛、酮和大多數羧酸都不會使其溶脹,但在部分非極性中容易溶解或溶脹我們的優勢:我們的產品均能為客戶提供***報告與COA出廠報告我們的市場行情信息準確我們及時提供售后技術支持我們的貨源充足穩定