Everything You Need to Know About Crimp Bags

What are crimp bags?

Crimp bags are specialised packaging typically made from materials like plastic or cellophane. These bags are sealed by crimping, a process that uses heat or pressure to fold and bond the edges. This creates a tight, airtight seal that keeps contents protected from air, moisture, and contaminants. Crimp bags are popular in industries such as food, pharmaceuticals, and retail because they help preserve freshness, ensure product safety, and provide tamper-evidence, indicating if the bag has been opened.

Key features

How to choose the right crimp bag

When choosing a crimp bag, think about what you’re packaging. For food items like snacks or baked goods, go for thicker bags (30–50 microns) to keep the contents fresh and avoid tearing. For pharmaceuticals or small electronics, a thinner, more flexible bag may work, but make sure it’s clear and strong enough to keep the product visible and secure. Also, choose a bag size that fits the product well—too big wastes material, and too small makes crimping difficult.

Uses for crimp bags

Crimp bags are widely used in various industries due to their versatility and protective features.

In the food industry, crimp bags are essential for packaging perishable goods like snacks, baked goods, dried fruits, and spices. Their airtight seals help prevent spoilage by keeping air and moisture out, ensuring products stay fresh for longer periods.

In the pharmaceutical sector, crimp bags are crucial for storing small medical supplies such as tablets, capsules, and single-use medical devices. These bags offer a sterile, tamper-evident packaging option, ensuring the integrity of medications and protecting them from contamination during transport and storage.

The retail industry uses crimp bags for a range of products, from small electronics like earphones and USB drives to cosmetics such as lip balms and lotions. Crimp bags not only provide visibility for the customer but also protect the product from dust and damage, making them ideal for shelf display.

In the crafts and hobby sector, crimp bags are often used for packaging small items like beads, buttons, or sewing accessories. The clear, protective packaging allows customers to see the contents, while the crimp seal ensures the items are securely contained.

Lastly, agricultural products such as seeds or fertilizer samples are often packed in crimp bags, as the airtight seal helps preserve the quality of the contents during storage and shipping.

How to properly use crimp bags

To get a strong seal, make sure you’re using the right crimping tool for the bag material and size. For plastic or polypropylene bags, a heat sealer is often needed to apply steady heat and pressure along the edge. Cellophane bags typically need less heat and can be sealed with a manual crimping tool. Always ensure the seal is applied evenly along the entire edge to prevent any leaks or contamination.

Where to buy crimp bags

At Norman Knights, we’re proud to offer a range of high-quality OPP crimp bags. So whether you’re looking for bags to preserve food, secure medical supplies or showcase your products, our range of crimps bags are the perfect solution! Explore the full product range and buy online.