poly mailers by single-layer polyethylene composition, with thin,
good elasticity, good waterproof performance, characteristics of
low prices, is widely used to express small package, the main
material for low density polyethylene, color is gray, black,
opaque, can better protect client privacy, usually used for
wrapping the outer layer, the bag outside Post Express single.
About poly mailers material, need to pay attention to: in the south
of China Guangdong area, people called high density polyethylene
for PO, low density polyethylene called PE.
Polyethylene is a typical thermoplastic, it is a non smelly,
tasteless, non-toxic flammable white powder. PE resin molding
process is the extrusion granulation of the wax particles, the
appearance of milky white. Its molecular weight in the range of 1
in case of Loa million. The molecular weight of more than 100
thousand of the ultra-high molecular weight polyethylene UHMWPE3 F.
The higher the molecular weight, the better the physical and
mechanical properties, the more close to the level of the
requirements of the engineering materials. But the higher the
molecular weight, the difficulty of the processing is also
increased. The melting point of polyethylene is 100-130C and its
low temperature resistance is excellent. Good mechanical properties
can be maintained at -60, but the temperature at 80~110.
Online shopping outbreak of type growth gave birth to the vigorous
development of poly mailers industrial chain, enterprises and
individuals are increasingly attach importance to product
packaging, online shopping transactions because of transport
problems lead to broken parcel everywhere, so the disputes are
increasing, for my company will continue to increase investment,
development of the Poly bag a variety of high-quality, low-cost,
also my company and other types of courier bags, such as: contained
liner coated bubble bag, containing the metal foil vacuum bag, with
anti electrostatic shielding bag, conductive bags, welcome customer
inquiries from all walks of life.