1. Food packaging bag density
The density of food packaging bags is a single molecule of a unit volume
and functions for their stacking methods. The entertainment hydride is composed
of light atoms, so the general density is low. The density of a polymer of
simple hydrocarbons -polyethylene, polypropylene, and polystyrene is 0.9 丨
.ig/cm3. Polyethylene and density with heavier such as fluoride or chlorine
atoms can get a density of 1.2 丨 .5g/cm3 with a density of 1.5g/cm3 was 2.1 ~
2.28/0^polytrafluoroethylene. The density of polydehyde is more density because
the C -0 -C keys are built closer. The crystalline polymer is more dense than an
amorphous polymer, because the stacking is more dense, so the density is high.
The composition, structure and crystallization of the polymer can be reflected
through the density.
2. Food packaging bag transparency
The transparency of the food packaging bag is through the optical M and the
total incident House through the optical M of the object: the ratio, also known
as the light transmission, and sometimes it is determined by a certain
wavelength range of light. The density difference is required to determine the
transparency, because the refractive index is always proportional to the
density. If the density of the amks is similar to that of the crystal material,
it is slightly scattered when the mixture of the two structures through these
two structures, and the material is transparent; on the other hand, when the
density difference between the two is very large, it is opaque. In the
polyethylene, the density difference is small in a large density difference.
However, if the polymer crystal material is quickly cooled, the crystal is very
small, so that the polymer crystal is shorter than the wavelength of the light
to pass through the light. Materials can be transparent.
3. Food packaging bag water absorption
Food packaging bags will be immersed in a certain size (25 feet or 20: T 2
feet 2 feet) of the specified size of the sample. You can also use the unit area
of water absorption or water absorption (milligram)
Read recommendations:
PET food bag
smart food Snack food bag Manufacturing
spout pouch packaging manufacture
The use of vacuum bag and the method of controlling its thickness
Is there a shelf life for biodegradable plastic bags?
Tel: +86 188 2689 9458
+86 188 2689 9458
Download Catalogs
Wechat
Whatsapp
