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The application status and development trend of modified PP in home appliances
Polypropylene is one of the first-selected plastic varieties in the household appliance industry due to its low density, good chemical resistance, low price, and excellent comprehensive performance, and its consumption accounts for about 30%. With the continuous emergence of personalized and intelligent new home appliances, higher requirements have been put forward for the application and modification of PP in home appliances. PP modification technology will be developed around the following aspects. 1. Green: Compared with traditional spraying materials, spray-free materials such as spray-free PP materials have relatively simple processes, are more environmentally friendly and economical, and have the characteristics of high gloss, easy forming, scratch-resistant, recyclable, etc., spray-free materials There are more and more applications in the field of home appliances, especially spray-free PP materials. Second, safety: meet the requirements of unattended electrical appliances, flame-retardant modified PP materials, etc. Meet the requirements of modified PP materials for long-term unattended electrical appliances proposed by the International Electrotechnical Commission (IEC). The IEC60335 standard requires that the glow wire at 750℃ contacts the tested material or product within 30 seconds without fire or the burning time ≤ 5 seconds (ie GWIT ≥ 750 ℃) and tracking index (CTI) ≥ 250V, Poly Sailong modified PP material can Satisfy. 3. Health: In order to reduce costs, such as anti-dyeing PP, the liner materials of household appliances such as dishwashers or juicers are mostly made of modified PP materials. After repeated use, the liner is easy to become dirty. The reason is that the liner material is contaminated after direct contact with fruit juice, food residues, food seasonings, etc., which causes the surface color of the material to change. When the color changes to a certain degree, it will become dirty, and even pollute the next batch of food as a source of pollution, reducing product Use quality. Anti-dyeing PP can avoid this problem. 4. Lightweight: Long glass fiber reinforced PP and micro-foam injection molding PP materials with high continuous long glass fiber content reinforced PP materials: have good dimensional stability, excellent comprehensive mechanical properties, small creep and excellent Fatigue resistance. Micro-foam injection molding PP material: refers to the polypropylene material as the matrix, through the injection process under the action of gas internal pressure, the middle layer of the product is densely covered with closed micropores with sizes ranging from ten to tens of microns, and there are dense skins on both sides Structure; so as to achieve the purpose of saving materials and reducing weight. Because the micro-foam material uses lower stress, the injection molding is flatter, straighter, and more stable in size. At the same time, due to the supporting effect of the micro-holes, it can also effectively solve the sink marks of the parts. 5. Functionalization: Marks and barcodes used for identification on plastic products such as PP materials that can be laser engraved are usually generated by external processing methods such as printing, labeling, embossing, and punching. Printing marks on the surface of plastic products is a new type of marking technology with high processing speed, which can maintain the inherent surface characteristics of plastic products, and make text and icons never fade. The plastic product 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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