The difference between 3F’sPU film and TPU film! Do you understand?
Generally speaking, there is no difference between PU film and TPU film above 0.03mm. It is customary for many people to call thick and thin TPU films PU films, especially some shoe factories and printing factories.
PU film and TPU film below 0.03 are completely different.
PU film is made by coating process and reacted with solvent. It can be made very thin, but it is very difficult to make it above 0.025mm.
The TPU film is generally made by blown film, casting or even calendering. The thickness can be 0.01-2.5mm. In addition, traces of the heated melt flow of the TPU material may be visible.
The PU film has good softness. Because it is thin and the solvent evaporates and precipitates, it has high moisture permeability.
The TPU film uses a hydrophilic base for moisture permeability. The highly moisture-permeable TPU film also has very high moisture permeability.
Because the PU film is lined with a backing paper and the backing paper has a high degree of matte, the PU is very matte and matte.
TPU film can be made into a matte surface, but it is still difficult to achieve an extremely matte surface.
The specific gravity of PU film is about 0.9.
The specific gravity of TPU film is about 1.2.
PU film is easy to make into colored products.
TPU film for colored products requires a relatively high minimum order quantity. The main reason is that the former is coated and the latter requires cleaning of the screw!
PU films are mostly used in leather, clothing and medical and health fields.
TPU film is mostly used in shoe materials, bag materials, clothing and inflatable products.
PU film is not as environmentally friendly as TPU film due to solvent reasons.
PU film is thermosetting and cannot be processed twice.
TPU film is thermoplastic and can be processed twice or even multiple times.
For films of the same thickness, PU film is much more expensive than TPU film.
