Elasticity refers to how far an elastic can stretch while maintaining its ability to return to its original length.

A highly elastic binding cord:

• Adapts to different bundle sizes.
• Absorbs shocks during transport.
• Maintains tension even when products lose moisture and shrink slightly.
• Reduces stress on delicate stems and leaves.

If an elastic is too stiff, it may apply excessive pressure to the product. If it is too soft, bundles may become loose during handling and transportation.

Holding force is the amount of pressure the elastic applies to keep a bundle together. The ideal holding force depends on the weight and structure of the crop.

Too Little Holding Force

• Bundles may fall apart.
• Products can shift during transport.
• Packaging lines may experience inconsistencies.

Too Much Holding Force

• Products may become compressed.
• Sensitive stems and leaves can be damaged.
• The elastic may leave visible marks.

The goal is always to achieve the lowest possible pressure while maintaining a secure bundle.

One of the most common concerns in produce bundling is the risk of the elastic cutting into the product.

This is influenced by:

• Bundle weight
• Elastic tension
• Contact surface area
• Product sensitivity

Delicate herbs such as parsley, cilantro, dill, and mint require lower pressure than products such as leeks or asparagus. A properly selected elastic distributes pressure evenly and secures the bundle without damaging stems or leaves.

Many growers assume that a heavier elastic automatically increases the risk of damage. In reality, a thicker or multi-core elastic often distributes force over a larger surface area. This can reduce pressure concentration and improve bundle stability. The key is selecting the correct elastic for the product weight rather than simply choosing the strongest option available.

When comparing binding elastics, many buyers focus solely on the price per roll. However, the true cost is determined by the number of bundles produced from each roll and the reliability of the bundling process.

A cost-effective elastic should:

• Minimize product damage.
• Reduce bundle failures.
• Deliver consistent machine performance.
• Provide the lowest cost per bundled product.

An elastic that is slightly cheaper but causes bundle failures or product damage often results in higher overall costs.

Using an elastic that is too heavy for the application increases material consumption unnecessarily. Using an elastic that is too light may result in loose bundles and product losses. The most economical solution is therefore the elastic that provides:

• Sufficient holding force.
• Reliable performance.
• Product protection.
• Maximum yield from every roll.

For many growers, optimizing elastic selection can significantly reduce packaging costs over the course of a season.

Examples:

• Parsley
• Cilantro
• Dill
• Mint

Requirements: High elasticity Gentle holding force Maximum product protection

Examples:

• Spring onions
• Radishes
• Beet bunches

Requirements: Balanced elasticity Medium holding force Reliable transport performance

Examples:

• Leeks
• Asparagus
• Large vegetable bunches

Requirements: Higher holding force Strong bundle retention Multi-core elastic options