In recent years, kraft paper packaging bags have been widely used in various scenarios by virtue of their unique advantages of being natural, eco-friendly, simple, elegant and textural. They can be seen everywhere from coarse cereal packages on supermarket shelves and coffee bean fresh-keeping bags in coffee shops to household storage bags, gift packaging for niche brands, and industrial applications, making them a mainstream packaging choice that balances practicality and aesthetics.
1.Flat Mouth Top
The flat mouth is the most basic, classic and widely applied mouth type of kraft paper packaging bags, without complex additional structures. It is mainly sealed tightly on the top or side of the kraft paper through heat sealing, adhesive bonding or traditional sewing processes, with smooth and flat edges. Among all mouth designs, this type has the lowest cost and is the most eco-friendly one, with no redundant accessories. It can be completely naturally degraded after being discarded, imposing no burden on the environment.
Core Uses: Positioned with the core advantages of “low cost, disposable use, eco-friendliness and convenience”, it is suitable for scenarios that do not require repeated sealing, have no special requirements for opening difficulty, and attach importance to a minimalist texture and the practice of eco-friendly concepts. As the basic style of kraft paper packaging, it has a wide range of applications and outstanding cost performance.
2.Easy-Tear Mouth
The easy-tear mouth is an upgraded and optimized version of the flat mouth design, which focuses on solving the core pain point of “difficult to tear” of traditional flat-mouth kraft paper packaging bags. It is currently the most widely used and mainstream mouth type of kraft paper packaging bags on the market. This type completely retains the low cost and high eco-friendliness of the flat mouth, while greatly improving the convenience of use, balancing texture and practicality, with outstanding cost performance, making it the first choice for most daily scenarios.
Appearance Features: The overall shape continues the concise style of the flat mouth, with the core difference being a special easy-tear notch set at the edge of the seal. Common shapes include crescent, triangle, straight line, etc. Some styles are marked with the words “Easy Tear” at the notch to help users quickly locate the opening position. High-end styles adopt an invisible easy-tear line design, with no obvious notch, and the appearance is basically the same as that of an ordinary flat.
3.Resealable Zipper Mouth
Resealable zipper mouth, also known as zipper lock mouth, is the most practical resealable type among kraft paper packaging bags, and also a necessity for households and merchants. This type is specially laminated with a waterproof PE film on the inner side of traditional kraft paper packaging bags, effectively solving the pain point that kraft paper itself is not waterproof. Meanwhile, a concave-convex zipper structure is set at the seal, which can fit tightly after closing, realizing multiple openings and sealings. It corely addresses the needs of contents for freshness preservation, moisture resistance and anti-scattering.
Appearance Features: The seal is equipped with obvious concave and convex stripes, namely the zipper structure, which is mainly divided into two styles: exposed zipper and invisible zipper. The exposed zipper has prominent stripes, clearly visible to the naked eye, with a distinct opening and closing hand feeling; the invisible zipper has a flat surface, perfectly integrated with kraft paper, without destroying the overall aesthetic, featuring a higher appearance level. Some styles are equipped with an easy-tear mouth for the first opening, avoiding damage to the kraft paper and zipper due to excessive force, balancing texture and practicality.
4.Valve Mouth
Kraft paper valve bag is a professional packaging bag specially designed for filling bulk materials, powder or granular materials. Its core feature is a self-closing “valve” set on the side or top of the bag body, different from conventional opening designs. The valve can seal automatically after filling, without additional sealing processes, balancing filling efficiency and sealing performance. It mostly adopts multi-layer kraft paper composite material to enhance load-bearing and moisture-proof properties, adapting to bulk packaging scenarios in industry and agriculture.
Core Features:
- High filling efficiency: The valve design can be adapted to automatic filling equipment, without manual bag opening, greatly improving filling speed, reducing labor costs, and adapting to the bulk packaging needs of large quantities of materials.
- Excellent sealing performance: The self-closing valve can effectively prevent material leakage, moisture and caking, especially suitable for powder and fine granular materials, avoiding dust and scattering during transportation and storage.
- Strong load-bearing capacity: The multi-layer kraft paper composite material can bear a large weight, usually able to load 25kg-50kg of materials, meeting the load-bearing needs of bulk packaging in industry and agriculture.
- Eco-friendly and durable: The main body is made of kraft paper, which can be naturally degraded in line with environmental protection concepts. Meanwhile, the material is tough and not easy to break, adapting to long-distance transportation and long-term storage.
- Good regularity: The bag body has a regular shape after filling, facilitating stacking and storage, saving storage and transportation space.
5.Drawstring Closure Mouth
Drawstring closure mouth is a distinctive mouth type of kraft paper packaging bags, positioned with the core advantages of retro texture and adjustable sealing, making it the first choice for gift-giving and high-end storage scenarios. This type has symmetrical rope holes reserved on both sides of the bag mouth, threaded with cotton rope, hemp rope or paper rope. The sealing is realized by pulling the drawstring, which not only achieves a certain sealing effect, but also significantly improves the overall appearance and texture, with a strong literary and artistic atmosphere.
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