Vials and Inserts
Closures
Other Information
Additional Resources
Technical Information: Cap Materials : Closures
Closures
Closure refers to the assembled combination of a cap and septa. At this time, Worldwide Glass Resources offers only assembled closures; separate caps or septa are not available.
Worldwide Glass offers closures in the following cap materials:
- Aluminum
- Magnetic closures are made of steel and are used in autosamplers with a magnetic arm.
- Phenolic is a type of thermosetting plastic material known for its physical and molding properties. Phenolic caps have strength and durability with heat-resistant and insulating properties. Excellent resistance to chemical corrosion and low moisture absorption. Autoclaveable.
- Polypropylene (PP) is a rigid plastic that is translucent or may be tinted to provide colored material. At room temperature, polypropylene exhibits excellent chemical resistance to acids, alcohols, and bases. Compatible with acetone, ethyl acetate, methanol, isobutyl alcohol, methanol, methylene chloride, and methyl ethyl ketone. Incompatible with cyclohexane, ethers, dichlorobenzene, pentanes, and trichlorobenzene. Gas, disinfectants or autoclave are recommended to sterilize products made of polypropylene. Maximum temperature use is 135°C.
- Polyethylene (PE), further classified as low-density, is a flexible translucent plastic. At room temperature, polyethylene exhibits excellent chemical resistance to acids, alcohol, and bases. Gas, radiation or disinfectants are recommended to sterilize polyethylene. Maximum temperature use 120°C.
Plastic Resin Codes
Plastic Resin Codes |
||||||||||||
Abbreviation |
Chemical Designation |
Temp °C (Max) |
Temp °C (Min) |
Specific Gravity (g/cm3) |
Transparency |
Flexibility |
Autoclavable |
Microwavable |
Dry Heat |
Gas |
Gamma |
Disinfectants |
LDPE |
Low Density Polyethylene |
100 |
40 |
0.92 |
Translucent |
Good |
No |
Yes |
No |
Yes |
Yes |
Yes |
HDPE |
High Density Polyethylene |
120 |
100 |
0.95 |
Translucent |
Rigid |
No |
Yes |
No |
Yes |
Yes |
Yes |
PP |
Polypropylene |
135 |
0 |
0.90 |
Translucent |
Rigid |
Yes |
Yes |
No |
Yes |
No |
Yes |
PTFE |
Polytetrafluoroethylene |
250 |
-267 |
2.1-2.2 |
Opaque |
Good |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
PS |
Polystyrene |
90 |
-10 |
1.05 |
Clear |
Rigid |
No |
No |
No |
No |
Yes |
No |
Sterilization Reference Guide
Sterilization Reference Guide |
|
Method |
Procedure |
Autoclave: |
Cycle is 121°C, 15 psig (1 bar) 20 min |
Dry Heat: |
170°C for 60 min |
Gas: |
Ethylene Oxide for formaldehyde |
Microwave: |
Transmission of microwaves |
Gamma Irradiation: |
High energy ionizing gamma radiation from a Cobolt 60 source |
Chemical Disinfectants: |
Quaternay Ammonim Compounds, Iodophors, Formalin, Benzalkonium Chloride, Ethanol, etc. |