Application Status and Development Trend of Modified PP in Household Appliances

- Jun 12, 2018 -

Because of its low density, good chemical resistance, low price, and excellent overall performance, polypropylene is one of the first-choice plastics in the home appliance industry. Its consumption accounts for about 30%. With the emergence of personalized and intelligent new home appliance products, the application of PP in home appliances has also been put forward with higher requirements. The PP modification technology will be developed around the following aspects.

First, green: free spray PP materials

    Compared with traditional spraying materials, spray-free materials have relatively simple technology, are more environmentally friendly, more economical, and have features such as high gloss, easy molding, scratch resistance, recyclability, etc. The application of spray-free materials in the field of home appliances is increasing. , especially spray-free PP material.

    Second, security: to meet the unattended appliance requirements flame retardant modified PP materials

    Meet the requirements of the International Electrotechnical Commission (IEC) for long-term unattended use of modified PP materials. The IEC60335 standard requires that the 750°C glow-wire contact the test material or article does not catch fire within 30 seconds, or that the burning time is ≤ 5 seconds (ie GWIT ≥ 750°C) and the tracking index (CTI) ≥ 250V.

    Third, health: anti-dye PP, etc.

    In order to reduce costs, most of the interior materials of household appliances such as dishwashers and juicers are made of modified PP materials. After repeated use, the liners are easily dirty. The reason is that the inner liner material directly after contact with fruit juice, food residue, food seasoning, etc. is subject to pollution caused by the surface color of the material changes, when the color changes to a certain extent, it will be dirty, and even pollute the next batch of food as a pollution source, reducing the product Use quality. Anti-staining PP can avoid this problem.

    Fourth, lightweight: long glass fiber reinforced PP and micro-foam injection molding PP materials

    High continuous length glass fiber reinforced PP material: It has good dimensional stability, excellent comprehensive mechanical properties, less creep and excellent fatigue resistance.

    Micro-foamed injection molding PP material: refers to polypropylene material as the substrate, through the injection process under the effect of gas pressure, make the middle layer of the product with closed size from ten to several tens of micrometers and closed micropores with dense skin on both sides. Structure; thus achieve the purpose of saving materials and weight. Due to the low stress of the micro-foamed material, the injection molding is smoother, more straight, and the size is more stable. At the same time, due to the supporting effect of the micro-holes, the sink marks of the parts can be effectively solved.

    V. Functionalization: Laser engraving of PP materials, etc.

    Marks for identification on plastic products, such as trademarks and barcodes, are usually generated by external processing methods such as printing, pasting labels, stamping, punching, etc. The use of laser marking machines to print marks on the surface of plastic products is a high processing speed. A new type of marking technology that keeps the inherent surface characteristics of plastic products and makes the characters and icons never fade. Plastic products laser marking machine uses laser beams to directly generate marks on the plastic surface. The pattern design is flexible and does not require other processing procedures.

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