185 Technical Data
Plastic Resins Listed below are the primary resins used in the manufacture of our products. Following are some of the characteristics and features of these resins. Also listed is the Society of the Plastic Industry (SPI) resin identification code number.
Polyethylene Terephthalate Glycol (PETG) Semi-rigid to rigid depending on wall thickness. Natural color — clear and transparent. Good alcohol and solvent barrier; fair gas and good moisture barrier. Good to fair chemical barrier; not good for strong acids or bases. Good moldability. Sterilizable through EtO and gamma radiation. Good stress crack and impact resistance at room temperature and above. Polypropylene (PP) Rigid, solid, durable in container or closure forms. Opaque, natural grayish yellow in natural form. Excellent stress crack and impact resistance. Excellent moisture barrier, good oil and alcohol barrier, poor gas barrier properties. Good chemical resistance. Sterilizable with EtO or autoclaving . Polystyrene (PS) PS is a transparent, rigid and glass-like polymer. Good resistance to inorganic chemicals. Light and heat stable, biologically inert and non- toxic. Poor impact and stress crack resistance, poor barrier properties. EtO or Gamma sterilizable. Polyvinyl Chloride (PVC) Flexible to rigid. Good for coatings; fair water and good oxygen barrier. Transparent to yellowish color in natural state. Good chemical resistance. Sterilizable by EtO. Good impact and some stress crack resistance. Poor recycling due to chloride residues. PTFE, FEP, PFA Polytetraflouroethylene, fluorinated ethylene propylene, perfluoralkoxy. All fluoropolymers feature opaque characteristics, excellent chemical resistance, good heat stability and thermal shock resistance. All are autoclavable, heat, and gas sterilizable .
High Density Polyethylene (HDPE) Flexible but more rigid than LDPE. Natural color is milky white, semi- translucent depending on density. Good impact strength and stress crack resistance. Good chemical resistance. Good vapor barrier but poor gas barrier. Sterilizable via EtO or gamma radiation. Low Density Polyethylene (LDPE) Very flexible, natural milky color, translucent with high impact strength. Excellent for mild and strong buffers, good chemical resistance. Good water vapor and alcohol barrier properties. Poor gas barrier, sterilizable with EtO or gamma radiation. Good stress crack and impact resistance. Linear Low Density Polyethylene (LLDPE) Very flexible, natural milky color, translucent with high impact strength. Excellent for mild and strong buffers, good chemical resistance. Good water vapor and alcohol barrier properties. Poor gas barrier, sterilizable with EtO or gamma radiation. Good stress crack and impact resistance. Polybutylene Terephthalate (PBT) Good chemical resistance, clear color, resistant to water, weak acids and bases at room temperature. Can be sterilized by EtO and autoclaving, at temperatures up to 180°C. Polycarbonate (PC) Rigid and strong, excellent clarity. High impact strength. Poor barrier properties. Polyethylene Terephthalate (PET) Semi-rigid to rigid depending on wall thickness. Natural color — clear and transparent. Good alcohol and solvent barrier; good gas and fair moisture barrier. Good to fair chemical barrier; not good for strong acids or bases. Good moldability. Sterilizable through EtO and gamma radiation. Good stress crack and impact resistance at room temperature and above.
Table 5. Typical Properties of Plastics HDPE LDPE
LLDPE
PC
PET
PETG
PP
PS 70
PVC
PTFE
Max. Temp °C Transparency Sterilization** Autoclave
120
80
50
135
60
70
135
70
240
Transl
Transl
Transl
Transp
Transp
Transp
Transl
Transp
Transl
Opaq
No
No
No
Yes Yes
No
No
Yes Yes
No
No
Yes Yes Yes
Gas
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Dry Heat Radiation
No
No
No
No
No
No
No No
No
No No
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes
No
Disinfectants Density G/Cm 3
Yes
No
Yes
Yes
0.95
0.92 Flex <-75 2400
0.92 Flex
1.19 Rigid -135 9000
1.33
1.27
0.90 Rigid
1.06 Rigid
1.34 Rigid
2.15 Rigid -110
Flexibility
Semi <-75
Semi
Semi
Brittleness Temp °C Tensile Strength, Psi
-76
-10
-40
0
+20
-30
4000 4000 **Depends on thickness and relates to containers and closures. Because there are many grades of resins and processing methods, the above information should be used as a general guideline only. 2000 8000 7500 5000 6000 5000
Table 6. Permeability of Plastics HDPE
LDPE
LLDPE
PC
PET
PETG
PP
PS
PVC
PTFE
N 2 O 2
See Note 1
42
180
—
50
0.8
10
44
50
2
—
See Note 1
150
500
—
250
5
25
90-140
185-485
4
—
CO 2
See Note 1
580
2700
—
1000
15
125
650
1160
4
—
Moisture See Note 2
0.3
1.3
—
7.4
2.0-4.0
0.5
0.3-0.7
8.5
1.0-5.0
—
Note 1: Units are cc x mil / 100 in 2 x day x atm @ 25°C Note 2: Units are g x mil / 100 in 2 x day @ 38°C, 50 - 90% RH
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