materials determine lifespan
PE film (polyethylene):
Maintain 7-15 days at room temperature
Shrinkage rate ≤5% in a freezing environment of -25℃, lasting for 1 month
PVC film (polyvinyl chloride):
Easily hydrolyzed in a high humidity environment, and can last up to 10 days in outdoor transportation
Strong puncture resistance, suitable for packaging angular hardware
LLDPE film (linear low-density polyethylene):
Add anti-UV agent, and maintain 20-25 days in open-air stacking
Pre-stretching rate can reach 300% , 7 layers of wrapping can prevent typhoons
These operations cut the lifespan in half
According to statistics from the after-sales department, 80% of premature failures are caused by incorrect use:
Overstretching: Exceeding the elastic limit of the film (PE film>250%, PVC film>150%) leads to molecular chain breakage;
Violent puncture: No corner protection is done during forklift loading and unloading, and a single point hole causes the entire film to tear;
Mixed tape: Paste ordinary tape on the film surface, and the surface tension layer is damaged when it is torn off;
Stacking and stacking: The wrapped goods are stacked more than 3 layers high, and the bottom film is subjected to more than 200% additional pressure.
-
Environmental variables:
High temperature exposure: Under 40℃ environment, the number of days that PE film can last is reduced from 15 days to 6 days;
Salt spray corrosion: The lifespan of metal parts wrapped in film in coastal areas is 40% shorter than that in inland areas;
Day and night temperature difference: 30℃ during the day/5℃ at night, the film shrinks and expands and loses 0.3mm thickness every day.