Have a headache! What suction nozzle bag use environmental protection non-toxic materials do?

Now very popular on the market some of the liquid and powder object with suction nozzle bag packaging, mainly because of the suction nozzle bag enclosed is more convenient, but also can be repeated use, in the guarantee the health security at the same time reduce the cost of packaging supplies. So more and more products are considering using suction nozzle bag packing, so that the suction nozzle bag made of what kind of raw materials can only non-toxic environmental protection and low cost has become the most attention problems, the following will introduce suction nozzle bag made from what material the most environmental protection! Low density liquid suction nozzle bag, PE resin with high density, low density two kinds big. High density PE less branched chain, the molecules of regularity is good, have good crystalline, this kind of PE film mechanical strength is higher, but the transparency is poor, especially the heat shrinkable film, made by its constant temperature curve of contraction, high temperature sensitive area contraction, poor performance, narrow milk suction nozzle bag so manufacturing polyethylene heat shrinkable film, should choose low density polyethylene ( Generally choose density at zero. 920-0. 925 g/cm3 polyethylene) 。 The melt flow speed is low, high molecular weight, molecular tangle between nodes, used in the production of heat-shrinkable thin, drinks suction nozzle bag in thin film form, retention force elastic deformation, resulting in a larger shrinkage rate. Therefore, manufacturing polyethylene heat shrinkable film, choose low melt flow rate of polyethylene is good, heat shrinkable film melt flow rate of the polyethylene used generally should be not more than 5 g / 10 min, had better be in 1. 0 a, under 10 min. Film contractility is related to the degree of molecular weight distribution of the resin. KuanZhe in general, the molecular weight distribution, thermal shrinkage performance is good, so if there are any conditions, heat shrinkable film production when had better choose bimodal type vinyl resin.