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Slicing of PET protective film

by:Skypro     2021-04-08
The most critical quality and technical index of PET protective film slices is characteristic viscosity [η], and the [η] of protective film grade PET slices is usually (0.64±0.015) dL/g. To improve the tensile strength and elastic modulus of the PET protective film, a PET resin with a high [η] value can be used. [η] is high, indicating that the molecular weight is high, the chain segment of the macromolecule is long, the attraction between molecular structures is large, and the tensile strength after stretching into a film is relatively higher. For example, compared with the tape base and the PET protective film for gold wire, the PET chip with the maximum value of [η] can be used as the raw material.


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