How to prevent woven bags from aging?

Domestic woven bags are made of polypropylene, and polypropylene itself has no anti-aging function, so the anti-aging problem of woven bags has attracted more and more attention. The main categories of woven bags are garbage bags, ash bags, cement bags, fertilizer bags and asphalt bags. Some products require woven bags to have heat resistance and oxidation resistance. Anti-aging (anti-ultraviolet) additive for plastic woven bags. Plastic antioxidants commonly used in polyethylene, polypropylene resin or plastic woven bags are generally divided into three categories according to molecular structure and mechanism of action: hindered phenols, phosphites and composite types. Hindered phenol antioxidant is the main antioxidant of plastic materials, and its main function is to react with oxidation free radicals R and ROO produced by oxidation in plastic materials, thus interrupting the growth of active chains. Phosphite antioxidant is an auxiliary antioxidant. The main mechanism of auxiliary antioxidants is to decompose high-activity hydroperoxide in plastics into low-activity molecules through the change of valence of phosphorus atoms in their own molecules. Function of anti-aging additives for plastic woven bags. Different types of main and auxiliary antioxidants, or the same type of antioxidants with different molecular structures, have different functions and application effects, and each has its own advantages and disadvantages. Composite antioxidants are compounded from two or more antioxidants of different types or varieties of the same type, which can learn from each other's strong points in plastic materials, show synergistic effect, and achieve appropriate anti-thermal oxidation aging effect with appropriate dosage and cost. Synergistic effect means that when two or more additives are used in combination, their application effect is greater than the sum of the effects of each additive used alone, that is, 1 1 > 2. Light stabilizers commonly used in polyethylene, polypropylene resin or plastic woven bags are generally divided into three types according to their action mechanisms: light shielding agents, ultraviolet absorbers and hindered amine light stabilizers. The main functions of light stabilizers are: shielding light, absorbing and transferring light energy, quenching or capturing free radicals. The above are the types and functions of anti-aging additives for woven bags. It is hoped that the majority of woven bag manufacturers can conduct research and innovation on this basis to improve the anti-aging performance of woven bags.