Thermoplastic polyurethane elastomer film and its composite film and preparation method
A thermoplastic polyurethane, composite film technology, applied in the direction of polyurea/polyurethane adhesive, film/sheet without carrier, film/sheet adhesive, etc., can solve the problem of low production efficiency, poor mechanical properties, residual smell Heavy and other problems, to achieve the effect of reducing equipment investment, high production efficiency and simple method
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[0026]The preparation method of the composite film provided by the present invention, including:
[0027]S11: Provides thermoplastic polyurethane elastomer glue, first release film, and second release film;
[0028]S12: Heating the thermoplastic polyurethane elastomer glue, and is placed between the heat-treated thermoplastic polyurethane elastomeric adhesive in the first release film and the second release film, to obtain a prefabricated film layer;
[0029]S13: The first surface absorbs the first energy by irradiating the first surface of the prefabricated film layer and the second surface provided opposite the first surface, the second surface absorbs the second energy, thereby prefabrication The thermoplastic polyurethane elastomer glue in the membrane layer is cured to obtain a composite film, wherein the first energy is 10 mJ / cm.2-500MJ / cm2The second energy is 100mJ / cm2-800MJ / cm2.
[0030]In step S11, the thermoplastic polyurethane elastomer glue preferably uses a solvent-free the...
Embodiment 1
[0058]Providing a solvent-free thermoplastic polyurethane elastomer glue and heated to 40 ° C, the heated thermoplastic polyurethane elastic glue droplets were added to the first release film and the second release film in a flexible manner. The release film and the second release film are both silicon-type films, a thickness of 50 μm, from 3 g of a force, and a thermoplastic polyurethane elastomer is extruded to a thickness of 150 μm to obtain a prefabricated membrane with a bonding roll of 40 ° C. Floor.
[0059]The first surface 20s of the prefabricated film layer is irradiated with a low pressure mercury lamp to ensure that the first energy of the first surface is 50 mJ / cm.2After that, after irradiation from the second surface 15s of the first surface with high pressure mercury lamp to ensure that the second energy absorbed by the second surface is 300 mJ / cm2In curing the thermoplastic polyurethane elastomer in the prefabricated film layer to obtain a composite film.
[0060]The f...
Embodiment 2
[0062]Provides a solvent-free thermoplastic polyurethane elastomer glue and heated to 50 ° C, the heated thermoplastic polyurethane elastomer glue droplets are added to the first release film and the second release film, first The release membrane and the second release film are both a fluorin release film, a thickness of 50 μm, a radical force of 10 g, and a thermoplastic polyurethane elastomer is extruded to a thickness of 150 μm to obtain a prefabricated membrane with a bonding roll of 50 ° C. Floor.
[0063]The first surface 20s of the prefabricated film layer is irradiated with a low pressure mercury lamp to ensure that the first energy absorbed by the first surface is 100 mJ / cm.2After that, after irradiating the second surface 10s of the first surface with a high pressure mercury lamp to ensure the second energy of the second surface is 350 mJ / cm2In curing the thermoplastic polyurethane elastomer in the prefabricated film layer to obtain a composite film.
[0064]The first relea...
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Abstract
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