As people continue to use plastics, a flammable material is used underground, but its combustion performance is not well understood. Therefore, people initially tried to reduce the amount of experimental work through simulation experiments. As required by the plastic inspection regulations, the purpose of the experiment was to study the effects of plastic combustion decomposition products on human respiratory tract, skin and eyes, with particular emphasis on it. The effect of the protective effect of the filter self-rescuer used underground. Plastics are organic substances that produce combustion decomposition products under the action of heat. The process of this reaction is complex and it is difficult to understand the details of the actual process. In addition, different plastic reactions are also different. In the plastic manufacturing process, in order to obtain the necessary physical and process properties, the properties of the raw materials are often changed by various additives. These plastic additives account for up to 60%. If there is a fiber reinforcement layer, it should also be included in the composition of the plastic. All of these ingredients affect the composition and fire resistance of the plastic decomposition products. In general, the flue gas of polyolefin mainly contains carbon monoxide, while the flue gas of polyvinyl chloride mainly contains hydrogen chloride.
The amount and composition of the decomposition products are related to the combustion process. To illustrate the possibilities, only two extreme processes are indicated; combustion (or open flame combustion) and low temperature dry slip in the absence of oxygen. Only a few of the thermal decomposition products are familiar and can be determined by typical analysis of consumption. Carbon monoxide belongs to this category, which has the properties of solidified red blood cells and suffocation. But carbon monoxide is not a typical product of plastic burning.
Generally, the plastic must be a flame-retardant material that meets the plastic inspection regulations, and it can be decomposed by strong acid. Halogens from fire-fighting equipment, which first produces hydrogen chloride or hydrogen bromide, which are irritating to the human respiratory tract, skin and eyes.
Use a filtered self-rescuer to protect the respiratory tract. According to the experience of the Ruhr School of Health, tests conducted under special combustion conditions can be used to infer the irritating effects of combustion decomposition products on the skin and eyes. The bromine-containing combustion decomposition product has a strong stimulating effect on the skin and eyes. It is not suitable to use plastics that can produce bromine-decomposing substances in the well. Otherwise, the eyes may not shed tears or even open their eyes. So pay special attention when using it.
Ratchet Buckles
Ratchet buckles are the one of the most important part of ratchet lashing belts.
They fuction as the adjuster of the webbing,by treading the webbing through the axel,and ratcheting it back and forth,that's how we manage to tighten the webbing,is also called ratchet tensioner.
The most didely-used ratchet buckle is galvanized buckles.And sometimes we can see other kinds like black electrophretic painted buckle,powder painted buckle,and some non-standard buckles.
Apart from its surface treatment,we can also tell buckles can be sorted by its inside width,they are the almost same with webbings,so we have 1'' buckle,2'' buckle,3'' buckle,etc.
Ratchet Buckles,Ratchet Belt Strap,Ratchet Tensioner,Ratchet Belt Buckle,Custom Ratchet Belt Buckle,Cargo Buckles,Belt Buckle,Turn Buckle,Metel Buckle
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