Repair Method for Damaged Inner Lining Of Refrigerated Box

Most of the refrigerated boxes inner lining with fiberglass reinforced plastics. During the usual process of loading and transporting goods, it is inevitable that they will be scratched, damaged or even punctured. Replacing the liner with a new one is often cost-prohibitive, so fixing it quickly and easily can save a lot of money.

Types of Damage

Surface Scratch
The scratch’s width is thin and hasn’t damaged the base of the panels.
Surface Damage
The damage is big and has damaged the base of the panels but the base of the panel doesn’t break through.
Substrate Breakage
The damage to the substrate is serious and has been penetrated.

Repair tool

Heat air Gun, the max. capable of heating up to 1110℉.
Electrical iron, the max capacity of heating up to 428℉.

The methods to repair damage

The method to repair surface scratch

1. Soak the rag with alcohol, and clean the scratch with the soaked rag.
2. After the alcohol is dry, use a sheet of Teflon over scratch.
3. Use a heated electric iron on the Teflon sheets which cover the defective part and iron， at last, take away the electric iron.
4. Wait for the repair area cools down to less than 176℉, and remove the Teflon sheet. This method gets a smooth surface, only leaving a slight trace (As shown in the red circle).

The method to repair surface damage

1. Soak the rag with alcohol, and clean the rear area with the soaked rag.
2. Wait for the alcohol to dry then choose the PP granules that are the same in quality and color to the tear on the panel (choose according to the tear’s depth and size), place the granules on the surface tear of the panel.
3. Use a sheet of clean Teflon over the repair area.
4. Use a heated electric iron and cover the Teflon sheet’s defective part and iron, at last, take away the electric iron.
5. Wait until the repair surface cools down to less than 176℉， and remove the Teflon sheet. This method gets a smooth surface, only leaving a slight trace.

Repair method for substrate breakage

1. Choose the Repair Patches that are the same in quality and color as the panel but without non-woven fabrics at the back. The repair patch will completely cover the damaged hole.
2. Soak the rag with alcohol, clean the damaged area, and the repair patch with the soaked rag.
3. Wait for the alcohol to dry then hold the repair patch against the panel and heat the patch and panel with a heated air gun. When the material is melting, apply pressure to the surface to get a good joint.
4. If the welding appearance has higher requirements, be next to the patch edge landscaping treatment.
5. Clean the edge of the patch with a soaked alcohol rag.
6. Wait for the alcohol to dry, Use a sheet of Teflon on the repair patch.
7. Use a heated electric iron to iron the patch and matrix material welding edges smooth the transition.
8. Wait until the repair surface cools down to less than 176℉, and remove the Teflon sheet.