At present, the procurement cost of the home appliance industry is getting higher and higher. Many home appliance companies have proposed various cost reduction schemes in order to reduce the procurement cost. Among them, the replacement of ABS by HIPS to produce plastic parts and components is also included in the cost reduction plan. one. Mainly because the purchase price of HIPS is much lower than ABS, and HIPS has the same shrinkage rate as ABS, and the plastic parts produced have the same appearance of ABS, so it can be directly used without modifying the injection mold. The plastic parts of HIPS are produced by a mold for producing ABS parts. Therefore, many manufacturers hope to use HIPS instead of ABS to produce plastic parts, in order to reduce the company's procurement costs. 
HIPS's raw materials are almost all styrene. Compared with ABS, which consists of three kinds of raw materials, price prejudging is easier for purchasing companies, which is good for enterprises to control risks. Styrene is the most important raw material for ABS and HIPS, accounting for 61% and 92% of ABS and HIPS, respectively. Butadiene accounts for 17% of ABS raw materials, butadiene rubber accounts for 8% of HIPS raw materials. Butadiene rubber, also known as polybutadiene rubber, is made of 100% butadiene, so butadiene and These two products also have very close ties, and the ups and downs of butadiene have a crucial impact on the price of ABS. Compared with HIPS, the raw material composition of ABS is more complicated and has more influencing factors, and the cost control is relatively more difficult.
However, we believe that although HIPS has certain similarities with ABS physical properties, it can be used in air conditioners, washing machines, refrigerators, electric vehicles, toys and stationery. However, ABS can also be used in motorcycles, vacuum cleaners, batteries and other products that require high raw materials. HIPS can only be used for packaging. Their performance is still somewhat different, so HIPS is not a substitute for ABS's position in the market.
The biggest reason behind the replacement of ABS by HIPS is the cost. The downstream enterprises are pursuing cost-effectiveness. If it is only some low-end and mid-range applications, the performance requirements for plastic materials are not so high, and merchants will naturally choose cheaper materials. If it is a high-end application, HIPS performance can not meet the requirements, even if it is cheap, it can not replace ABS. Therefore, the replacement of raw materials must take into account the balance between performance and cost.
HIPS and ABS performance difference
(1) In addition to the flexural modulus of HIPS and ABS, in other aspects of testing, the performance of HIPS is much lower than ABS, especially the impact strength. After aging for more than 240h, the impact strength of HIPS is 5kJ/m2. Below, only 1/4 of ABS, the performance of this data in daily applications is that the parts of HIPS are brittle and easily broken.
(2) The tensile strength, flexural strength and flexural modulus of HIPS did not change much after aging, but the impact strength changed greatly. The impact strength before HIPS aging was 10.188 kJ/m2, after aging for 240 hours and 400 hours, The impact strengths were 4.674 and 4.56kJ/m2, respectively, which were 45.9% and 44.7% before the decline, which was more than half. Moreover, after aging for 240 hours, the impact strength was 4.6 kJ/m2.
It is easier to age than ABS, resulting in a significant drop in impact strength. In the application to household appliances, the parts produced by HIPS can achieve the same effect of ABS parts at the beginning of use, but with the prolonged use time, or repeatedly affected by high temperature and low temperature, the aging of HIPS The speed is much faster than ABS and it is easy to break, which leads to a decline in the service life of the product.
(3) Tests have shown that HIPS parts are not suitable for use in everyday household appliances that are often subjected to high temperatures, such as high temperature products such as rice cookers and electric kettles, and in areas with high temperatures in the south, plastic parts produced by HIPS are Outdoors with high temperatures are also prone to aging and are not suitable for long-term use.
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