Blister packaging and injection packaging are two different methods used for packaging products. Here are the key differences between the two:

1. Blister Packaging:
   - Definition: Blister packaging is a type of where a product is contained within a cavity or pocket made of clear thermoformed plastic. The plastic is sealed to a backing card or foil, creating a protective and transparent package.
   - Manufacturing Process: Blister packaging is produced through a thermoforming process. Thin sheets of plastic, such as PVC, PET, or PS, are heated and molded to create the desired shape of the cavity. The product is then placed in the cavity, and the plastic is sealed to a backing card using heat or adhesive.
   - Benefits: Blister packaging offers high visibility of the product, allowing customers to see the item before purchase. It provides protection against tampering, moisture, and physical damage. Blister packs are typically lightweight, stackable, and suitable for retail display.

2. Injection Packaging:
   - Definition: Injection packaging involves injecting molten plastic into a mold cavity to create a container or package for the product. The mold is usually made of steel or aluminum and has the desired shape and dimensions of the packaging.
   - Manufacturing Process: Injection packaging is produced through the injection molding process. Plastic pellets are melted and injected into the mold cavity under high pressure. Once the plastic cools and solidifies, the mold is opened, and the finished package is ejected.
   - Benefits: Injection packaging offers design flexibility, allowing for the creation of complex shapes, detailed textures, and customized features. It provides excellent durability and strength, making it suitable for heavy or fragile products. Injection-molded packages can be produced at a high volume with consistent quality.

In summary, blister packaging relies on thermoformed plastic for creating a clear, protective cavity around the product, while injection packaging involves injecting molten plastic into a mold to produce a container. The choice between blister packaging and injection packaging depends on factors such as the product's characteristics, required visibility, durability needs, and production volume.