Wuhan Handern fungicides (microbicides) and protectants
DATE：2021/2/2 8:41:02 / READ： / SOURCE：This station
Wuhan Handern fungicides (microbicides) and protectants
Microorganisms, molds and bacteria can affect the appearance, performance and use value of plastics. Some higher organisms, such as insects, rodents, birds, molluscs and crustaceans, can also damage plastic products. In order to prevent or suppress the above disasters, people's anti mold agents (microbial killing agents) and protective agents are often added before molding and processing. Casting film equipment www.handern.com1. Definition and requirements of mould inhibitor
Molds, bacteria and other microorganisms can make plastics (resins or additives, especially plasticizers, lubricants, etc.) deteriorate, including the change of composition and the fracture of chemical bonds, showing the change of color, smell or weight, the change of brittleness and electrical properties, and the decrease of exudation, tensile strength and elongation. The chemical additives used to prevent degradation and damage caused by microorganisms must be able to kill and inhibit the growth of microorganisms. These additives are called microbicides or biological inhibitors, and are traditionally called fungicides. Because any fungus is the main source of harm.
The ideal fungicide should have the following conditions:
The results are as follows: (1) it can kill the fungi which erode polymer materials with high efficiency, wide application range, long-lasting effect, effective at low concentration, and no damage;
(2) There is no bad opinion on the present nature of good brand incense. There is no chemical reaction to human skin and human flesh, nor does it affect the plastic industry
(3) It has good compatibility with plastics and additives and good chemical properties;
(4) no sublimation, little water mobility, colorless or self colored peripheral, no line dyeing to products
(5) It has good light, heat and chemical stability;
(6) It has the advantages of stable storage, convenient use and low price. Casting film equipment www.handern.com
2. Varieties of fungicides
There are many kinds of fungicides, mainly including the following five types:
(1) Phenol, chlorojasminol and their derivatives have strong bactericidal power and low price.
(2) Organomercury compounds are highly toxic and have the strongest bactericidal power. They are commonly used as pesticides, plastic protectants and antimicrobials. (3) organotin compounds have strong bactericidal power and less toxicity, but they are still harmful to human body. Among them, rgsnx type is the most bactericidal. It is widely used in plastic products.
(4) The organic key has low toxicity and is safe to use, but it is volatile and yellow green. 5) other organic compounds, organic compounds, organic hydrophobic compounds, organic halides, nitrogen heterocyclic compounds, etc. Several commonly used fungicides are listed in table 3-35.
① Limited to PVC paste products. Casting film equipment www.handern.com
3. Protective agent
Additives used to prevent insects, birds, rodents and marine organisms from damaging plastics are called protectants. The protective agent should have suitable comprehensive properties, harmless to human body, no side effects on the protected materials, low cost, compatibility with plastics, resistance to molding temperature and durability.
Trimethylbenzene phosphate can prevent termites, and trinitrobenzene complex can effectively prevent the damage of Egyptian mice. Tetrathiuram disulfide and dimethylamino zinc cyclohexylamine complexes also have this effect, but the efficiency is poor.
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