Physical and chemical indicators of polyethylene
Index name and title
Detailed description
Example of indicator requirements (may vary depending on different types of polyethylene)
Remarks
1
Density
Polyethylene single low density polyethylene (LDPE): density shadow
0.910-0.940g/cm ³ per volume;
;
Quality
High density polyethylene (HDPE): hardness
0.941-0.970g/cm ³ degree, strength
and other properties
2. Melt flow at specified temperature.
MFR range reflects different rates
degrees and load ranges. For example, under the MFR (MFR) of LDPE, 10 minutes can be 0.2-30g/10min processability
From standard
Energy
Extruded melt
Body mass
3 tensile strength polyethylene in LDPE: 7-20MPa;
; HDPE: Reflects Polyethylene
Tensile Test
20-50MPa
Ethylene
Tensile Energy
Maximum Force
Index Name
Detailed Description
Example of Index Requirements (may vary depending on different types of polyethylene)
Remarks
Tensile Strength
4 Fracture Elongation Polyethylene in LDPE: 200% -700%;
;
Rate
Tensile fracture
HDPE: 100% -600%
Elongation of ethylene
Resilience
Ratio of quantity to original
Length
Value
5-dimensional softening polyethylene at LDPE: 60-90 ℃;
; HDPE: Measuring Poly
Points
Required Conditions
120-130 ℃
Ethylene
Under 1mm ²
Heat resistance
Pressure needle
Energy
Temperature at 1mm depth
Degrees
6
Hardness
Polyethylene is commonly represented by Shore hardness, reflecting the Shore hardness of LDPE against other substances, which can be the Shore hardness of ethylene
Press the body into its D40-60;
Shore hardness of HDPE
Index name and title
Detailed description
Example of index requirements (may vary depending on different types of polyethylene)
Remarks
Surface energy
Hardness can be D60-80
Degree
Force
7 Oxidation induction: Under specified temperature
Time
Degree and oxygen
(OIT) conditions, polyethylene
begins to oxidize
Reaction time
Interval
General requirement ≥ 20min
Reflects the antioxidant properties of polyethylene
