[China Packaging Network News] According to experts from China Packaging Network, commodity packaging techniques refer to the various methods and strategies used during the packaging process. These techniques are closely linked with the essential functions of packaging, particularly the protective role. As technology continues to evolve, packaging methods have also advanced significantly. There are numerous types of packaging techniques, which can be broadly categorized into transportation packaging and sales packaging based on their main functions.
First, Transportation Packaging Techniques
1. General Packaging Techniques
(1) Proper Placement, Fixation, and Reinforcement
Proper placement, fixation, and reinforcement of products in transport packages require specific skills. By doing so, it's possible to reduce the size, material usage, and overall loss. For instance, regular-shaped items should be neatly arranged, while weak areas need additional support.
(2) Compression Packaging for Loose Foam Products
For loose foam products, the volume they occupy during packaging can be quite large, increasing transportation and storage costs. To address this, vacuum packaging is commonly used to compress the volume effectively.
(3) Appropriate Choice of Inner and Outer Packaging Dimensions
When loading goods into containers, it’s crucial to ensure that the dimensions of the package match the container. This helps maximize space utilization and protect the product better. The bottom dimensions of the inner and outer packaging should align with a standard modulus system. The height of the package depends on the product type—lighter items can be taller, while heavier ones should be lower to ensure stability during stacking.
Inner packaging should complement the outer packaging in shape and size. It should not be too large or too small, as oversized packages may be difficult to handle, while undersized ones might make it hard to identify labels or signs.
(4) Bundling Packages
Bundling plays a significant role in packaging, especially in securing multiple items for transport and handling. It helps prevent theft, reduce volume, and enhance the strength of the container. Common methods include well-strapping, cross-strapping, and parallel strapping. For smaller items, a baler is typically used, while larger loads may benefit from shrink or stretch film wrapping.
Shrink film packaging involves wrapping the item with a heat-shrinkable film, which tightens around the product when heated. Stretch film packaging, on the other hand, uses elastic film that wraps tightly around the product at room temperature without any heat required.
2. Special Packaging Techniques
(1) Cushioning Packaging
Cushioning packaging, also known as shock-proof packaging, involves placing buffer materials between the product and its container to absorb shocks and vibrations. Common materials include foam plastic, wood wool, and springs. Foam packaging, a relatively new method, uses a foaming device to inject raw materials into the gaps, creating a foam layer that tightly encases the product.
There are three main cushioning methods: full cushioning, partial cushioning, and suspension cushioning. Full cushioning surrounds the product completely, while partial cushioning focuses on high-impact areas. Suspension cushioning uses ropes or springs to suspend the product inside the box, ideal for delicate and high-value items like precision instruments.
(2) Moisture-Proof Packaging
Moi sture-proof packaging aims to prevent moisture from entering the package and affecting the product. Materials such as metal, glass, and coated cardboard offer good moisture resistance. Plastic films can also provide some protection, though their effectiveness depends on thickness and processing. Methods like coating, oiling, waxing, and using desiccants (such as silica gel) help improve moisture resistance.
(3) Mold-Proof Packaging
Mold-proof packaging includes measures to prevent mold growth on both the packaging and the contents. Using materials like aluminum foil, high-density plastics, and composite films can help block microorganisms. Sealing the package and adding anti-mold agents or gas-phase treatments like paraformaldehyde also prove effective.
(4) Rust-Proof Packaging
Rust-proof packaging protects metal products from corrosion. Methods include plating, oxidation treatment, oiling, painting, and vapor phase rust prevention. Anti-rust paper and nitrogen-filled packaging are also commonly used to extend the shelf life of metal goods.
(5) Collective Packaging
Collective packaging improves handling efficiency, reduces labor, and saves costs. Common types include container bags, containers, and pallets. Container bags are lightweight and reusable, while containers are suitable for large-scale transport. Pallets made of wood or plastic offer durability and ease of stacking.
Second, Sales Packaging Techniques
(1) Blister and Skin Packaging
Blister packaging involves wrapping a product between a transparent plastic blister and a base plate. Skin packaging uses a breathable board covered with a heated plastic sheet that is vacuum-sealed to the product. These techniques are ideal for daily consumer goods due to their visibility and ease of display.
(2) Shrink Packaging
Shrink packaging uses heat-sensitive plastic films that shrink when heated, tightly wrapping the product. It provides excellent protection against dust, moisture, and tampering, making it ideal for irregularly shaped items.
(3) Stretch Packaging
Stretch packaging uses elastic films wrapped around products at room temperature. It does not require heating, making it suitable for temperature-sensitive items like fresh food. It also saves energy and reduces damage risk.
(4) Fresh-Keeping Packaging
Fresh-keeping packaging uses preservatives to extend the shelf life of fruits and vegetables. Solid and liquid preservatives are placed inside sealed pouches or applied as coatings. Silicon window boxes regulate oxygen levels, further preserving freshness.
(5) Deoxidizing Packaging
Deoxidizing packaging removes oxygen from sealed packages to prevent microbial growth and spoilage. It is ideal for oxygen-sensitive products like certain foods and pharmaceuticals.
(6) Inflatable and Vacuum Packaging
Inflatable packaging replaces air with inert gases like nitrogen or carbon dioxide, reducing oxygen levels. Vacuum packaging removes air entirely, making it suitable for meat, grains, and other perishables.
(7) Short-Term Sterilization Packaging
This technique involves sealing food in composite materials and briefly exposing it to high temperatures (around 135°C) to kill bacteria, preserving taste, color, and nutrients.
After exploring these diverse packaging techniques, it's clear how essential they are in modern logistics and retail. If you're interested in learning more about packaging innovations, stay tuned to China Packaging Network!