(Clip Edge) Back Seal Bag Technology Introduction And Application Instructions
What is a (clipped) back-sealed bag?
(Clip edge) back-sealed bag, also known as center-sealed bag, back-center-sealed bag or three-dimensional back-sealed bag, is a bag made by folding a whole roll of film material into a cylindrical shape through a packaging machine, heat-sealing on the back of the bag, and sealing at the upper and lower ends. If the two sides are folded inward to form a square three-dimensional effect, it is a clamped edge back-sealed bag with a larger capacity and good standing property.
This type of bag is widely used in food, pet feed, health products, cleaning products and chemical industries. It is one of the most popular and cost-effective packaging forms on the market.
Structural characteristics and advantages of (clipped edge) back-sealed bags
The structure consists of a single-sided back heat seal (center seam seal) + upper and lower heat seals, which can be added with side clips and corner folds. Material selection Common materials include PET/PE, PET/VMPET/PE, NY/PE, etc. Multi-layer film structure Volume performance Under the same size, it can fit more products than three-side sealed bags. Processing flexibility Can be matched with easy-tear edges, clip chains, hanging holes, ventilation holes, bright/matte processing, etc. Cost-effective materials and processes are economical, suitable for mass packaging production Packaging appearance The back seal structure keeps the front intact, which is conducive to brand visual design
Applicable product types and industrial applications
Food packagingCoffee beans, candies, biscuits, instant powderMiddle-sealed edge bag + easy-tear mouthFeed/pet foodDog food, cat food, freeze-dried snacks, cat litterLarge-capacity back-sealed bag + two-side folding designHealth care/medical health powder bag, capsule bag, medical supplies packagingBack-sealed bag + resealable zipper designChemical/cleaning productsWashing powder, desiccant, detergent granulesMoisture-proof material + square three-dimensional bagAgricultural productsFertilizer granules, seeds, feed additivesHigh-barrier materialMiddle-sealed bag + large-capacity edge structure
Comparative analysis of back-sealed bags and other bag types
Back-sealed bags have low cost and fast processing speed. Powders, small particles, continuous filling production. Three-side sealed bags have strong sealing and simple graphic design. Small-scale trial production and single-use packaging. Zipper bags can be resealed and are easy to carry. Health food, dried fruits, small snacks. Stand-up bags have high display and beautiful shelf standing. Drinks, jellies, liquid detergents, etc.
FAQ
Q1: What is a side-sealed bag?
A: The side-sealed bag has inward folds on both sides of the traditional side-sealed bag to form a three-dimensional bag shape, which increases the loading capacity and verticality.
Q2: What products are the side-sealed bags suitable for?
A: Very suitable for large-volume food, feed, powder or granular products, with good packaging strength and display.
Q3: Can you print your brand logo?
A: The whole surface can be printed and the back cover design allows the front pattern to be fully presented.
Q4: Can this type of bag be designed with a ziplock?
A: It can be equipped with zip ties, tear-away edges, ventilation holes and other functions, and has high elasticity.
Q5: How long is the delivery time usually?
A: The delivery time for regular back-seal bags is about 10 to 20 working days, which varies depending on the bag type and printing method.