PP Woven Lamination Bags Color Stripe Sacks With Handles

1. Laminating process: The “basic protective layer” for bag performance

Laminating is the core pre-processing step for this type of shopping bag. Specifically, molten polyethylene (PE) film is tightly bonded to the surface of the colored striped PP woven base fabric using hot-press composite technology.

From a practical perspective, the value of this film layer is particularly prominent: on one hand, it prevents external moisture and dust from penetrating, such as when carrying fresh fruits, the bag body will not soften due to moisture from the produce, and it also prevents dry goods like flour and grains from getting dust stuck in the woven seams; on the other hand, it makes the bag surface smoother, allowing stains to be quickly wiped clean with a damp cloth. Additionally, the film coating enhances the vibrancy of the colored stripes, preventing them from fading and extending the bag's aesthetic appeal. Even after repeated use, the stripe colors remain clear. More importantly, the smooth film coating surface provides a flat, easily adherent base for subsequent printing processes, ensuring that printed patterns are clear and durable.

2. Handle Hole Punching Process: A Simple and Portable “Lightweight Option”

Process Features: After lamination, regular handle holes (commonly round or oval, with a diameter of approximately 3-4 cm) are punched into both sides of the bag's top using precision molds. This process eliminates the need for additional handles, as the bag's material itself forms the handle structure, resulting in a lighter overall weight and more space-efficient storage — when folded, it can be easily placed in a wallet or pocket for convenient access by consumers.

Suitable scenarios: More suitable for carrying lighter items, such as during short-distance shopping trips or when purchasing small quantities of goods, where the lightweight handle hole design does not add extra burden; additionally, it offers high production efficiency and relatively low costs, making it ideal for supermarkets to bulk-purchase as affordable shopping bags for sale.

Usage advantages: The reinforced ring around the handle hole effectively distributes hand pressure, preventing the hole from tearing due to excessive force when carrying, while reducing friction between the bag material and the hand, enhancing comfort during short-term carrying.

3. Sewn handle strap process: A “practical choice” for heavy-duty use.

Process Features: Handle straps made from the same PP flat yarn (or thicker PP woven straps) as the bag body are securely sewn to the inner side of the bag's top using a double-stitch sewing process. The handle strap width is typically 2-3 cm, with length adjustable as needed (standard length is 25-30 cm, suitable for most hand sizes).

Core Advantage: The load-bearing capacity far exceeds that of handle hole designs. Conventional sewn handle styles can easily carry 8-15kg of heavy objects.

4. Printing Process: The “Visual Carrier” of Brand and Information

Considering the usage scenarios and material characteristics of supermarket shopping bags, roller printing is adopted:

Process Features: Using flexible photopolymer plates with water-based ink as the printing material, printing is performed on the smooth bag surface after lamination. The process offers fast printing speed, high color accuracy, and precise reproduction of supermarket logos' gradient colors and fine lines. Water-based ink dries quickly, eliminating the need for prolonged drying after printing, making it suitable for large-scale customization by supermarkets.

Application Scenarios: Primarily used for printing supermarket brand logos, names, and slogans on the front of the bag. Due to the strong adhesion of water-based ink and the protective layer of the laminate, the printed patterns remain intact even after repeated wiping or exposure to moisture, ensuring that brand information remains clear and visible over the long term.