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leejuly posted a topic in General Discussions and LoungeNowadays, not only the chemical fiber manufacturers need to understand some basic knowledge to purchasing chemical precursor, but also the ordinary consumers have to get some information of various synthetic fibers to distinguishing the different fabrics in their daily life. We must have some skills when purchase colour polyester yarn, as the purchasing is very important. So what we must concern about and consider about when purchase. So what standards and specifications that the consumers should pay attention to when they buy the dope dyed Polyester Yarn DTY? 1.Understand the Degree of Fracture of The Wire It is indispensable for consumers to understand fracture strength. The fracture degree test of dope dyed polyester yarn dty is to text the maximum tension and withstand strength when consequently stretched the single fiber. The size of the fracture degree directly affects the fabric tear strength and abrasion resistance. If the fracture degree of is too low that the wire is easy to break in the weaving process. So the consumers and customers should pay more attention to it. Purchasing the 3ox/min strength above is the general standards in chemical industry. 2.Understand the Fabric Fineness In the chemical industry, every fiber has the specification. For example, there is a kind of fiber, the specification is 167dtex/48F, this means that the weight of per ten thousand meters of fiber is 167g, and the number of single fiber is 48. Otherwise, the “dtex” means the yarn’s thickness, “F” means the single fiber’s number. And many company used the “Dan” for standard that equal to 1.11dtex. 3.Master the Wire Crimp Contraction The wire crimp contraction degree performances in bulkiness. If the contraction degree was higher, the performance of wire would be more bulky, and the fabric made by this wire would be richer. On the contrary, the contraction degree is lower, the bulkiness of the dope dyed polyester yarn DTY would be poorer, and the fabric would wrinkle easily, not easy to be sized. In addition, consumers also need to consider the boiling water shrinkage, elongation, and oil content. Only considering several factors can choose the suitable yarn for their own using. DTY Polyester - http://www.lingangdty.com/product/trilobal-bright-dty/
leejuly posted a topic in General Discussions and LoungeEvery Elevator China is assigned a classification related to its weight capacity and the type of loading method that can be used. The loading classification must match the elevator’s intended use for it to operate safely. Most passenger elevators and standard freight elevators are assigned to Class A, or “General Freight Loading.” The weight of a one-piece load being moved on or off the elevator cannot be more than 25 percent of the elevator’s capacity. Freight can only be loaded or unloaded manually or with a hand truck. If a hand truck is used, its weight must be considered as part of the 25-percent loading restriction. Standard elevators are designed for Class A loading. Other types of loading place more stress on the elevator. If an elevator’s loading class is not known, it should be treated as if it is Class A. Using a loading method from any other class could be dangerous. Class B applies to freight elevators that are intended only to transport motor vehicles. These elevators can transport a vehicle with a weight up to the stated capacity of the elevator. Class C1 allows for the use of an industrial truck to load or unload an elevator. The combined weight of the truck and the load cannot total more than the weight capacity of the elevator. The truck can remain in the elevator while it is in operation. Class C2 allows for loading at the platform up to 150 percent of the elevator’s stated capacity. A one-piece load with a weight equal to the capacity of the elevator can be loaded with a forklift or lift truck onto the platform. The loading device must be removed before the elevator can be operated. Class C3 allows for heavy concentration loading where the static weight during loading and unloading is not more than the rated load. The weight of the load and the equipment used to move it must not be more than the elevator’s stated capacity. Class C3 elevators are usually used to transport one-piece loads equal to the capacity of the elevator. Class C loading is not permitted for limited use/limited application (LULA) elevators or accessibility lifts. Dazenelevator.com is the economical and reliable solution for handling freight.
leejuly posted a topic in General Discussions and LoungeThe net cost of nitrogen produced by nitrogen generators can be 20 to 30 times less than the cost of bottled or bulk stored liquefied nitrogen. To accommodate high pressure cylinders, liquid mini tanks or bulk storage vessels, valuable space in or outside the company’s premises must be set aside and procedures to monitor and manage the supply and arrange delivery must be considered. Safety and handling concerns must also be taken into account. The cost of addressing these issues can be high and difficult to budget for, while the price of gas and supplier rates continually increase and the environmental impact of truck-based deliveries gain significance. A range of gas generators, including PSA Nitrogen Generators, enables you to produce your total demand for nitrogen gas on your premises under your complete control. As a result you can generate as much or as little nitrogen as needed, at a fraction of the cost of having the gas delivered by an external supplier. With purity levels up to 99.995 percent and flows up to 145,000 SCFH, each PSA nitrogen generator has two adsorber beds filled with a carbon molecular sieve (CMS). Compressed air enters one end of a bed. While the smaller oxygen molecules are adsorbed by the CMS, the larger nitrogen molecules pass through the sieve and are stored. Once the tube is saturated with oxygen, the first adsorber releases the gas, and the second adsorber starts the process over again. Nitrogen generation packages are available as capital purchase or for long term rental. Continue reading to learn how you can buy the perfect PSA Oxygen Generators. Oxygen Making Machine - http://www.chinanitrogengenerator.com/