Types of zipper bags available from VNK's

From bags with heat-sealed zipper profiles to red line press-to-close bags and slider bags, VNK’s offers reclosable packaging options for importers, distributors and retailers. Each design has distinctive features in its opening, appearance and operation, helping customers choose a bag for the products they need to pack.

VNK’s existing range uses zippers attached to the film on a side-sealing machine. The range is now being expanded with red line zipper bags and slider zipper bags. Customers can submit an existing sample or develop their own specifications with VNK’s.

1. Bags with zippers sealing on the film

VNK’s existing zipper bags are made by heat-sealing the zipper to the film on a side-sealing machine. The zipper forms the reclosable opening, while the side seals form the edges of the bag.

With a press-to-close closure, two zipper profiles interlock when pressed together. The user pulls them apart to open the bag, then presses along the zipper to close it again. The body below holds the product, with access through the opening at the top.

This range provides a starting point for custom orders covering bag dimensions, zipper position and printed content. The same general closure style can be used in projects with different appearance and order requirements.

For importers sourcing an existing design, a physical sample shows the zipper construction, seals and bag proportions together. VNK’s can review photographs or a sample to discuss the requirements before specifications are agreed.

2. Red line zipper bags with a clear body

Red line zipper bags have a flat, transparent body and a red closure running across the bag near the opening. The contents remain visible through the film, while the red line makes the zipper stand out against the clear body.

The closure is press-to-close, with no slider. To open the bag, the user grips the film above the zipper and pulls the two sides apart. To close it, the profiles are pressed together along the opening.

If your customers are looking for clear bags with a red zipper, this is an easily recognisable option. VNK’s accepts quotation requests based on dimensions, material, thickness and quantity, including enquiries covering several specifications in one order.

The zipper is extruded separately and then heat-sealed to the bag film. The red line describes a product feature, whereas extrusion and heat sealing describe how the closure is made and attached. A red line bag is therefore not necessarily a separate manufacturing category from bags with attached zippers.

 3. Slider zipper bags

Slider zipper bags have a small sliding fastener on the horizontal closure at the opening. The user moves it to open or close the bag instead of pressing the two zipper profiles together by hand along their length.

VNK’s featured design has a rectangular, translucent white body with a white zipper and slider at the top. The product compartment sits below the closure, and the slider operates the opening.

For distributors, this is the option for customers who specifically want a sliding closure. A bag of similar shape and size with a press-to-close zipper operates differently. Closure type is therefore an important part of the product specification, not just a visual detail.

VNK’s welcomes slider zipper bag projects based on reference samples, dimensions, thickness, printing requirements and order quantities.

4. Choosing a bag style for your range

Choose by opening and closing method

For a bag closed by pressing directly along the zipper, the relevant mechanism is press-to-close. Red line zipper bags belong to this group.

If the requirement is a sliding fastener that travels across the opening, choose a slider zipper design. Keeping this distinction clear in a sales range helps customers receive the operation they expect.

Choose by product appearance

The red line design has a transparent body that keeps the contents visible. The featured slider design has a translucent white finish. Alongside the closure, film appearance and printing requirements shape the look of the packaging.

For branded bags, logos and printed content are considered together with the background colour, body dimensions and zipper area. A bag with the correct closure but a different print area or level of clarity may not meet the same retail requirement.

Distinguish product styles from manufacturing methods

Side sealing describes a bag-making operation, zipper extrusion describes how the profile is formed, and slider describes how the closure is operated. These are not three equivalent labels for separate product types.

In an ordering catalogue, photographs, closure type and finished specifications identify a bag more clearly than a manufacturing term alone. This is particularly useful for distributors carrying several similar-looking products for different customer requirements.

5. Develop custom OEM zipper bags with VNK’s

VNK’s is a plastic bag manufacturer in Vietnam with nearly 20 years of experience, supporting OEM and custom manufacturing for B2B customers.

A zipper bag project can start with a sample already in use or requirements for a new product range. Dimensions, thickness, material, colour, printing and packing are reviewed for each project.

VNK’s can provide flexographic printing on HDPE and LDPE with up to 12 colours and two-sided printing, and can handle complex bag structures and multi-step production requirements. The printing approach is discussed according to the material, bag construction and artwork for the order.

Explore VNK’s zipper bag range and send reference photographs with your required quantities to info@ksvn.com.vn. The sales team will work with you to clarify missing details, from the closure style to the finished bag specification.