It is an excellent approach to first understand the main purposes of applying tamper evident seals and induction seals to bottles and jars prior to choosing which one to utilize in your application.
For induction sealing the key benefits from that type of seal include:
a) An evident proof to show the end user that the contents of the merchandise were not opened.
b) It work as oxygen and moisture shield to preserve the reliability and shelf-life of the goods. For this reason alone, inductions seals are known to be freshness seals.
c) Removes leakage out of caps. Plastic caps are often closed pretty tightly right after their bottles are filled. Caps loosening and leaking goods are direct results of temperature modifications and vibration while in transport, frequently compromising considerable parts of product shipment that become hard to retail if not impossible.
d) To present the product in a professional manner that show the manufacturers’ concern on the best practices of good product selling.
For pressure sensitive sealing – sometimes called PS22 Wadding the primary advantages of that form of seal are diminished:
a) A visible tamper evident barrier indicating to the buyer the contents of this product have not been compromised.
d) To provide a professional finish that appears similar to the amount of care used by manufacturers using induction sealing.
You’ll be able to carefully peel the liner off the neck of the bottle containing pressure sensitive wadding and merely tighten up the cap by making use of pressure to be able to reseal the bottle with virtually no equipment or tools needed. By doing this bottle sealing with pressure sensitive cap sealing is a bit more visual than practical.
Pressure sensitive cap lining material normally has no foil barrier and thus has little to no barrier qualities to prolong shelf life or keep freshness. Several liquid products are not fitted to PS22 cap sealing because it is glue based.
Why is it that businesses choose pressure sensitive sealing materials over induction foil sealing? In some cases it is lack of knowledge of the induction sealing process and in other cases it is the “poor man’s” form of a tamper evident seal.
Another reason is the fact that Induction sealing tamper proof evidence requires induction sealing machine while pressure sensitive sealing requires no machinery whatsoever.
From USD$3500.00, you will find “safe” bench top induction machinery. Many hand-held induction machines, offer for sub, starts at USD$1000 and manufacturers of that level of equipment refuse to offer safety certifications or advise that they do not “yet” have the certification.
An induction machine is not like a toaster or a kettle so watch out for anybody offering toaster or kettle price tags for induction sealing equipment. An induction machine works with high currents and produces high degrees of magnetic and electrical fields.
Bear in mind on some retail products within your shelf with pressure sensitive seal – that although it looks tamper resistant, it is merely ‘tamper evident’ at best. The company making that product is getting the lowest cost path to providing you with an appearance which resembles but in no way works like an induction seal or a tamper proof seal.