Recently, the automobile panel of Hebei Iron and Steel Group Co., Ltd. entered the EVI early intervention service mode and won the praise of the automotive panel users, further enhancing the competitiveness of the Shaogang market.
The transparency of the plastic injection transparent shell matrix resin itself has a great influence on the transparency of PP plastic products. In order to improve PP transparency, a small amount of polyacrylate resin with good transparency and compatibility can be added.
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EVI refers to the early development stage of material manufacturers involved in downstream users, fully understanding the user's requirements for raw material performance, thus providing users with higher performance materials and personalized services. In today's harsh competitive environment of automotive panels, Handan Iron and Steel recognizes that to consolidate and expand market share, Handan Iron and Steel's automotive panels must change the original supply and order model, closely contact with automotive industry customers, and vigorously promote EVI's early intervention service model. In October, an automobile company in the south was preparing for improvement for a certain type of vehicle. The technicians of the company's automobile board went to the service and conducted detailed two-way communication with the car body designer and material tester of the company. In response to the requirements of the other party's designers, an in-depth performance description of the automotive sheet materials of Handan Iron and Steel was carried out, and suggestions were made for the original design. In combination with the different strength grades of Handan Iron and Steel's automobile panels, and considering the vehicle's rigidity, high speed and impact performance requirements under extreme conditions, the material improvement suggestions were proposed to the other party. The other party was very satisfied with the cooperation of Handan Iron and Steel, and proposed the trial requirements for high-strength steel 340LA and IF steel DC04, DC03 and other steel grades. 
(1) the inorganic nucleating agent mainly consists of ultra-fine talc powder and SiO2, and also includes calcium carbonate, mica powder, inorganic pigments and fillers, etc., which is cheap in price and rich in source, but has certain influence on the gloss and transparency of the products.
(2) organic nucleating agent organic nucleating agent is a kind of organics with low relative molecular weight, represented by sorbitol and its derivatives. It has good compatibility with matrix resin and can significantly improve product transparency and surface gloss.
(3) in the case of sorbitol, when the amount of nucleating agent exceeds 0.3%, the effect of transparency improvement is not obvious, and even decreases. However, when the dosage is less than 0.2%, the nucleation quantity is insufficient and the transparency is not increased enough. It can be seen that the amount of nucleating agent should be between 0.2-0.3%. Therefore, suitable nucleating agent content can better improve the transparency of PP.