Description
HDPE is a high crystallinity, non-polar thermoplastic resin.
High-density polyethylene is non-toxic, tasteless, odorless white
particles, melting point of about **0 ?, the relative density of
0.**1 ~ 0.**0. It has good heat resistance and cold resistance,
chemical stability, but also has high rigidity and toughness, good
mechanical strength. Dielectric properties, resistance to
environmental stress cracking resistance is also good. Melting
temperature of **0 ~ **0 ?. The molecules of the material, the
melting temperature in the range recommended **0 ~ **0 ? between.
High density polyethylene is a kind of white powder, granular
products, non-toxic, odorless, low density in the range of 0.**0 ~
0.**6 g/cm3; crystallinity of *0% to *0%, a softening point of **5
~ **5 ?, temperature up to **0 ?; hardness, tensile strength and
creep resistance than low density polyethylene; wear resistance,
electrical insulation resistance, toughness and cold resistance are
good, but relatively low density insulating slightly worse;
chemical stability, at room temperature, insoluble in any organic
solvent, acid, alkali and various salts of corrosion; film on the
water vapor and air permeability of small, low water absorption;
poor aging resistance, resistance to environmental cracking
resistance as low density polyethylene ethylene, particularly to
thermal oxidation performance would, therefore, the resin must be
added antioxidants and ultraviolet absorbers to improve the lack of
improvement in this respect. High density polyethylene film in the
force of the thermal deformation temperature is low, which is
applied to the attention.
Low density polyethylene (LDPE) is a plastic material, it is
suitable for various kinds of molding the thermoplastic molding
process, good processability. The main purpose is for LDPE film
products, but also for plastic products, medical devices,
pharmaceuticals and food packaging materials, blow molding
products.
Polyvinyl chloride (PVC) character as a slightly yellow translucent
and shiny. Transparency better than polyethylene, polypropylene,
polystyrene poor in, with the amount of additives, divided into
hard and soft PVC, soft products soft and tough, sticky feel,
hardness of hard products than low density polyethylene, but lower
than polypropylene, will appear at the inflection bleaching. Common
products: plate, pipe, shoes, toys, doors, windows, wire jacket,
stationery and so on. Is a polyethylene with a chlorine atom
substituted for one hydrogen atom in the polymer material.
