Paper corner protectors can be used for long-distance transportation, but their suitability depends on several factors such as the fragility and weight of the item being transported, the mode of transportation, and the overall packaging setup.

Paper corner protectors are generally effective for providing some level of protection to the corners of items and preventing them from getting damaged or crushed during transit. However, they may have limitations compared to other materials like plastic or foam corner protectors. Here are some considerations when using paper corner protectors for long-distance transportation:

1. Fragility of the item: If the item being transported is fragile or has delicate corners, additional cushioning materials such as foam or bubble wrap may be needed in combination with the paper corner protectors.

2. Weight and load-bearing capacity: Paper corner protectors are generally suitable for lightweight to moderately heavy items. If the items are significantly heavy, it's important to ensure that the paper corner protectors are strong enough to withstand the weight without collapsing.

3. Moisture and humidity: Paper corner protectors are susceptible to moisture and may weaken or lose their protective properties if exposed to excessive moisture or humidity. In long-distance transportation, it's essential to consider any potential exposure to moisture and take appropriate measures to protect the corner protectors.

4. Packaging setup: The overall packaging setup, including the box or crate used, the internal cushioning materials, and the securement methods, should be carefully designed to provide adequate protection during long-distance transportation. Paper corner protectors can be part of a comprehensive packaging solution, but they should be complemented by other appropriate packaging materials as needed.

It's advisable to assess the specific requirements of your items and consult with packaging experts or suppliers to determine the most suitable corner protectors and packaging materials for long-distance transportation.