Choosing the right carton for your packaging needs depends on various factors specific to your business. Here are some considerations:
- Corrugated boxes: These are ideal for moving and shipping heavy products due to their lightweight yet durable construction. The sandwiched fluted layer provides strength and protection.
- Boxboard or Salt Spray Chamber Paperboard Cartons: Paperboard boxes, with a grammage over 250 GSM, are suitable for smaller products. They can be customized in various designs and are visually appealing, making them popular for confectionery stores to pack cakes and pastries.
- Aseptic Cartons: Multi-layered aseptic cartons are designed to store liquid products or beverages, such as juices, milks, and sauces.
- Gable Top Cartons: Gable top cartons are multi-layered boxes used for refrigerated food products.
- Egg Cartons/Egg Trays: Egg cartons or trays are specifically designed for securely transporting eggs, providing individual compartments for each egg.
As a manufacturer, you can also combine multiple boxes to enhance product protection. For example, using a corrugated box to pack a sensitive electronic product, overwrapping it with a paperboard carton, and filling the empty space with egg cartons for added cushioning.
To ensure high-quality packaging boxes, manufacturers should conduct various quality tests. Some important tests for assessing box quality include:
- Bursting Strength Test
- Edge Crush Test
- Water Resistance Test using Cobb Sizing Tester
- Paper Grammage and Thickness Test
- Puncture Resistance Test
- Scuff Resistance Test
- Box Compression Test
Among these tests, the carton compression test is particularly important as it measures the carton’s ability to withstand pressure from the top before deformation occurs.
The compressive strength of a carton can be calculated using McKee’s Formula:
BCT = ECT x 5.876 x √(U x d)
Where: BCT (in pounds) = Box Compression Test ECT = Edge Crush Test U (in inches) = Box outline in inches d (in inches) = Thickness of the corrugated board