Since the outbreak in 2020, people have begun to pay more attention to "travel hygiene and safety". Elevators are the most common source of bacterial transmission, and whether going out or home, most people choose to take the elevator. A small elevator carries all the people in and out of the entire building every day. However, during special periods, if not taken seriously, elevators are highly likely to become a source of disease and bacterial transmission.

Toys are something that both children and adults like, but this favorite thing can also become a "hidden killer" of children's physical health. Antibacterial toys According to a measurement by a bacteriologist, after playing with disinfected toys for 10 days, the number of bacterial colonies on plastic toys can reach over 3000, nearly 5000 on wooden toys, and over 20000 on fur toys! According to domestic surveys, after 24 hours of playing with toys by children, there are an average of 35 bacterial colonies per square meter on the surface of plastic toys, 59 on wooden toys, and 21500 on fur toys. And the number of bacteria per colony can reach tens of thousands, including pathogens of infectious diseases such as dysentery bacilli and typhoid bacilli. These pathogenic microorganisms often cause children to develop corresponding infectious diseases. Therefore, antibacterial toys are gradually appearing on the market. Antibacterial toys are produced by adding antibacterial masterbatches to inhibit the proliferation of bacteria during the production of plastic toys, and then achieve the function of protecting children's health. Zhantong has developed a series of antibacterial products in accordance with relevant antibacterial standards and has undergone strict testing by various testing organizations. They can be used for children's plastic, silicone toys, and other products to enhance their antibacterial and antibacterial functions.

Plastic additives, also known as plastic additives, are compounds added during the molding process of polymers (synthetic resins) to improve their processing performance or to improve the performance of the resin itself. The main function is to improve the process performance of polymers, optimize processing conditions, improve processing efficiency, and improve the performance of products, thereby increasing the use value and lifespan of products. For example, plasticizers are added to reduce the molding temperature of polyvinyl chloride resin and make the product soft; Another example is the foaming agent added to prepare foamed plastics with light weight, shock resistance, heat insulation and sound insulation; The thermal decomposition temperature of some plastics is very close to the molding and processing temperature, and they cannot be formed without the addition of heat stabilizers. Therefore, plastic additives play a particularly important role in plastic molding and processing. The additives used for plastic molding processing include heat stabilizers, plasticizers, antioxidants, light stabilizers, flame retardants, foaming agents, antistatic agents, colorants and brighteners, fillers, coupling agents, lubricants, release agents, etc.

The plastic modification formula may seem simple, but there are hidden mysteries. This requires us to be cautious when choosing plastic additives. So, how to obtain a formula with higher performance, low cost, and easy processing? Today, I will introduce the selection of additives to you from the following six aspects.

Thermoplastic polyurethane elastomer (TPU) is a linear block copolymer composed of oligomer glycol soft segments and diisocyanate chain extender hard segments. TPU can be plasticized after heating, with excellent processing performance; At the same time, TPU has excellent strength, elasticity, and wear resistance, and has been widely used in industries such as automobiles, coatings, national defense, building materials, clothing, wires and cables. The limiting oxygen index (LOI) of ordinary TPU is only about 19%, which affects its application in areas with high fire safety requirements such as automobiles and cables. Flame retardant modification of TPU is very important.

Elastomers can be divided into two categories based on whether they can be plasticized: thermosetting elastomers and thermoplastic elastomers. Thermosetting elastomers, also known as rubber in the traditional sense, began to be increasingly commercialized in the 1990s as thermoplastic elastomers (TPE). These two types of elastomers are processed using two different methods: rubber is processed using thermosetting equipment, and TPE is processed using thermoplastic equipment. TPE is defined as a polymer material that exhibits rubber elasticity at room temperature and can be plasticized at high temperatures. This type of polymer combines certain characteristics of thermoplastic rubber and thermoplastic plastics. The basic structural feature of TPE polymer chains is that they simultaneously connect or graft certain plastic segments (hard segments) and rubber segments (soft segments) with different chemical compositions.