Smooth seals on packaging – practicality and resealability in one solution
Modern packaging today must not only protect the product, but also be convenient, resealable, and user-friendly. Slide closures – also known as resealable closures – play a key role in this, especially in the packaging of food and consumer goods. A slide closure may seem like a small technical detail, but it contributes significantly to the value, usability, and customer experience of a product.
What is a zip lock?
A zip lock is a reclosable closure built into the packaging. It is most commonly found at the top of bags and allows the packaging to remain securely closed after it has been opened for the first time. Its operation is simple: the seal consists of two interlocking profiles that close with slight pressure and can then be easily separated again by hand. A properly designed zipper seal provides an airtight closure, helping to preserve the quality of the product.
The most important advantages of the zipper closure:
easy and quick to use,
can be opened and closed multiple times,
keeps the product fresh,
reduces food waste,
premium feel and higher consumer satisfaction.
What types of packaging can the zipper closure be used for?
Due to its versatility, the zipper closure can be used for many types of packaging, primarily where the product is not used all at once.
Doypack bags
Doypack, or stand-up pouches, are one of the most common carriers of zip locks. Portioning and resealability are particularly important for snacks, seeds, coffee, tea, dried fruits, and pet food. Zip locks are not only a convenience feature here, but also a basic expectation on the part of consumers.
Stand-up pouches with windows
With stand-up pouches with windows, product visibility and freshness preservation are equally important. The zip lock ensures that the packaging retains its protective function even after opening, while allowing the consumer to remain visually connected to the product.
PE and PP-based packaging for the food industry
The zip lock is particularly practical for powdery, granulated or dried products such as flours, protein powders and spices. With these products, it is important that the packaging closes well, does not allow the aroma to escape and protects against moisture.
Other industrial and consumer uses
Zipper closures are not only used for food products. They are also suitable for packaging smaller industrial parts, household products, hygiene items, and even cosmetics, where repeated access is an advantage.
In-house extruded zipper closure solutions at Sipospack
One of the key professional advantages of Sipospack Kft. is that it manufactures its own zip fasteners using its own extrusion process. We sell the product under the name SiposZip, optimized primarily for processing on automatic packaging machines.
Our own seal extrusion process enables us to:
ensure stable, reproducible quality,
respond flexibly to individual customer and machine-specific requirements,
continuously monitor and optimize sealability and processability.
As a result, SiposZip zipper tape is not just a raw material, but a purpose-built solution for the efficient and reliable operation of automatic packaging systems.
