Multilayer biaxial orientation polyester film and manufacture method thereof
A technology of biaxial orientation and manufacturing method, used in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve problems such as scratches on polyester films, and achieve less scratches, high transparency, and optical properties. Good results
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Embodiment 1
[0055] In the polyester resin synthesis stage, silicon dioxide particles with a particle diameter of 5 nanometers are added, so that the content of the silicon dioxide particles in the raw material of the first polyester film layer is 5000 mg / kg.
[0056] The first polyester film layer raw material containing nano-scale silica particles, the second polyester film layer raw material not containing silica particles, and the third polyester film layer raw material not containing silica particles The co-extrusion equipment that is sent to the corresponding polyester melt extruder is extruded onto the rotating cooling roll to obtain a multi-layer composed of the first polyester film layer, the second polyester film layer and the third polyester film layer. Polyester film layer.
[0057] The obtained multilayer polyester film layer is preheated and stretched longitudinally at 100°C by 3.0 times; the surface of the third polyester film layer of the multilayer polyester film layer tha...
Embodiment 2
[0060] In Example 1, during the stretching process of the multilayer polyester film layer, the longitudinal stretch was 2.8 times, and the transverse stretch was 3.8 times to obtain a multilayer biaxially oriented polyester film with a thickness of 250 μm. Other components, processes and examples 1 is the same.
Embodiment 3
[0062] In the polyester resin synthesis stage, silicon dioxide particles with a particle diameter of 3 nanometers were added, so that the content of the silicon dioxide particles in the raw material of the first polyester film layer was 2000 mg / kg.
[0063] The first polyester film layer raw material containing nano-scale silica particles, the second polyester film layer raw material not containing silica particles, and the third polyester film layer raw material not containing silica particles The co-extrusion equipment that is sent to the corresponding polyester melt extruder is extruded onto the rotating cooling roll to obtain a multi-layer composed of the first polyester film layer, the second polyester film layer and the third polyester film layer. Polyester film layer.
[0064] The obtained multilayer polyester film layer is preheated and stretched 2.0 times longitudinally at 80° C.; the surface of the third polyester film layer of the multilayer polyester film layer tha...
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Abstract
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