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McKernan ::
Packaging 101 |
Please check out the packaging guides below. There will be more to come soon! In the meantime, if you have a question, please call us at 1-800-SURPLUS.
Guide to Finding the Correct Cap Size "Finish"
Choosing the correct closure "cap" is a very important step of the packaging process. Plastic and metal closures come in a variety of sizes, styles and colors.
In the packaging industry the word "finish" is used to refer to the material surrounding the neck opening of any container or the inside dimensions of a cap.
If you are trying to find the finish of your bottle or closure follow these steps.
The first number you need to find is the diameter. This measurement must be in millimeters (mm).
For a bottle: Measure from the outer edge of the thread on one side to the outer edge of the thread on the opposite side.
For a cap: Measure from the inside wall to the opposite side of the inner wall.
The second number refers to the threads.
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| 400 Continuous Thread |
410 Continuous Thread |
415 Continuous Thread |
Please remember that only by testing your product with the packaging samples can you determine proper compatibility. If you need further help please contact our friendly staff.
**Be sure to ask your sales rep to include a measuring guide with your samples!
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Types of Liners (Seals)
| L.L. - LINERLESS |
A closure that has been engineered to function in specific application without the use of an additional liner. |
| UNLINED OR NO LINER |
A closure with no special sealing features and no liner. |
| F-217 (TRI-SEAL) |
A foamed low-density polyethylene core between two solid layers of LDPE. |
| PS - PS-22 |
Pressure-sensitive adhesive, coated on polystyrene foam. |
| P.V. - PULP/VINYL |
Vinyl laminated to pulp board. |
| P/VAF |
Pulp and vinyl coated aluminum foil. |
| SA-66 |
Polyester film laminated to aluminum foil bonded to pulp board. |
| P/PE |
Polyethylene-coated white paper laminated to pulp board. |
| PW |
Pulp board with wax coating on one side. |
| CONE LINER |
Cone-shaped solid polyethylene. |
| P/RVTLF OR PVLF |
Vinyl coating applied to HDPE - coated white paper laminated to pulp board with lubricant film over vinyl. |
| PE |
Solid extruded polyethylene. |
| P/AF |
Aluminum foil laminated to paper and bonded to pulp board. |
| P/AFPET |
Polyester film applied to aluminum foil, poly bonded to paper and laminated to pulp board. |
| P/O |
Pulp and oilpaper. |
| P/SF |
Pulp and Saran Film. |
| P/SOLVSEAL |
Laminated pulp board. |
| P/TEFLON |
Teflon on pulp board. |
| PW |
Pulp board with a wax coating on one side. |
| P/WPW |
White paper laminated to pulp board with a wax coating on the white paper. |
| PLASTISOL |
Vinyl chloride resin applied as a liquid and baked to a final form. |
| P/TF |
Tin foil laminated to paper and bonded to pulp board. |
| 14B WHITE RUBBER |
White vulcanized styrene-butadine rubber. |
| F1410 |
Teflon/silicone rubber/polypropylene film. |
| HS (HEAT SEAL) |
Induction sealing is a no contact heating process that accomplishes the hermetic sealing of a container with a closure that includes a heat-sealable foil laminate. The typical induction innerseal begins as a multi-laminate liner inside a closure. It consists of a polymer that is compatible with the bottle material and capable of heat-sealing to the lip of the container.
When the closure is placed onto the container and is passed through a heat source. Usually an electromagnetic field produced by an induction heater. |
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Plastic Packaging Recycling Codes and Typical Plastic Properties
| |
Polyethylene
Terephthalate
(PET) |
High Density
Polyethylene
(HDPE) |
Polyvinyl
Chloride
(PVC) |
Low Density
Polyethylene
(LDPE) |
Polypropylene
(PP) |
Polystyrene
(PS) |
Other
Plastics |
| Properties |
 |
 |
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| Clarity |
Clear |
Translucent |
Clear |
Translucent |
Translucent |
Clear |
Plastic ID Code "7" is for other plastics |
Moisture
Barrier |
Fair to Good |
Good to Excellent |
Fair |
Good |
Good to Excellent |
Poor to Fair |
| Oxygen Barrier |
Good |
Poor |
Good |
Poor |
Poor |
Fair |
| Max Temp |
120F |
145F |
140F |
120F |
165F |
150F |
| Rigidity |
Moderate to High |
Moderate |
Moderate to High |
Low |
Moderate to High |
Moderate to High |
| Resistance to Impact |
Good to Excellent |
Good to Excellent |
Fair to Good |
Excellent |
Poor to Good |
Poor to Good |
| Resistance to Heat |
Poor to Fair |
Good |
Poor to Fair |
Fair |
Good |
Fair |
| Resistance to Cold |
Good |
Excellent |
Fair |
Excellent |
Poor to Fair |
Poor |
| Resistance to Sunlight |
Good |
Fair |
Poor to Good |
Fair |
Fair |
Poor to Fair |
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I would like to take this opportunity to extend my
appreciation for all that McKernan Packaging have done to assist Chaé Organics
in the launch of its new brand, and facilitating our project for the Emmy
Awards...
Very Sincerely,
Frank E. Maggio
Chief Operations Officer
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