The anti-aging of plastic woven products, especially the anti-aging of ton bags and other products, has been used in the use of the aging system in the Weifutang weaving company. There is a lot of learning, and good use can increase the use value of the products at the end of the room; Not too good to happen, Beibanjixing suffered a compensation from merchants. Anti-aging involves several courses including polymer chemistry, polymer material physics, and plastic materials engineering. The analysis of common problems in this chapter and their solutions explain this week's specific common problems from the theoretical research level. In this chapter, many reliable and reliable formulas for anti-aging of plastic end products are drawn.
Why do plastic woven materials and products age?
The materials are all fibrous materials, and the fibrous materials must continue to produce mildew in the whole process of their production, transportation, storage, production and processing, and the final few products, and the physical performance parameters are reduced, that is, aging. The main manifestations of aging include yellowing, lack of luster, surface cracking, delamination (polypropylene), and more serious physical properties such as tensile strength, impact compressive strength, bending compressive strength, and tensile strength are greatly reduced. , And then lack of performance indicators.
From the perspective of organic chemistry, whether the fiber material is purely natural or generated, because of its biological macromolecular chain structure, there are some weak bonds in some positions, and this weak bond becomes a breakthrough point for chemical changes. The aging of plastic woven raw materials and products is just that under natural conditions, chemical changes are gradually carried out from weak bonds, such as oxidation-reduction reactions, and a series of other chemical changes occur. As a result, the molecular formula of the fiber material changes, such as wire breakage, reduced relative quantum or chemical cross-linking, which affects the characteristics of the raw material, so that it cannot be used.
Of course, there are many factors of aging of plastic woven materials and products, such as heat, ultraviolet rays, wind, rain, snow and rain, etc.Plastic woven products have a large number of aging factors, such as long-term load, palletizing and squeezing working pressure, and the interaction of various external machines Erosion by force, electrostatic force and its contents.
The most common aging can be divided into two categories: thermal oxidative aging and photooxidative aging. There is temperature, and with the presence of CO2 in the sky, there will be thermal oxygen aging; the bright presence, that is, ultraviolet radiation, with the regas in the air, the bright oxygen aging, which happens to be the plastic woven material from During the whole process of manufacturing, storage and transportation, production and processing to application, the heat and oxygen in the natural environment and the sun (ultraviolet light) are the most touched.
The plastic weaving company should notice that the granular material of the plastic weaving polypropylene material has already been added with a chemical agent in the production process. The epoxy resin production plant ensures that it is not easy to cause great aging during production, manufacturing, storage and transportation. However, the pellets are not added with anti-aging agents, and the plastic braiding company should not store them for too long, because the surface of the pellets will be stored with the storage. The aging is more serious with time. Generally, it is not necessary to consider the aging of storage and transportation, which is the commonly used raw material for plastic weaving.