Fluororesin film
A technology of fluororesin and film thickness, applied in the field of fluororesin film, can solve the problems of reduced visible light transmittance, poor long-term weather resistance, poor friction resistance, etc., and achieve the effect of colorless transparency and excellent heat ray blocking performance
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Embodiment 1
[0097] ETFE particles: 462.5kg, ITO masterbatch A1: 25kg and blue masterbatch B1: 12.5kg were uniformly mixed, supplied to a single-screw extruder with a screw diameter of 65mm, filtered with a filter, and then, at 330°C Extruded into a film form with a T-die, contacted with a cooling roll set at 175°C to cool and solidify, and wound up to obtain a thickness of 100 μm with an ITO content of 0.25% by weight and a cobalt blue content of 0.050% by weight. unstretched film.
[0098] The obtained film had no yellow tint, was colorless and transparent, and the outdoor scene through the film looked natural and had good see-through. The near-infrared transmittance of this film was as low as 38.7%, and the heat ray blocking efficiency measured by a heat ray blocking evaluation test machine was 34.5%. The ultraviolet transmittance is reduced to 26.5%, and it is a film that also has an ultraviolet blocking effect. The film characteristics are summarized in Table 1.
Embodiment 2
[0100] Using the same raw materials as those used in Example 1, ETFE particles: 485 kg, ITO masterbatch A1: 10 kg, and blue masterbatch B1: 5 kg were uniformly mixed, and supplied to a single-screw extruder equipped with a screw diameter of 65 mm, A filter, a T-shaped die, and a film-forming device of a cooling cylinder were used to form an unstretched film with a thickness of 250 μm, an ITO content of 0.10 wt %, and a cobalt blue content of 0.020 wt % through melt extrusion film formation.
[0101] The obtained film had no yellow tinge, was colorless and transparent, and the outdoor scene through the film looked almost natural in color and had good see-through. The near-infrared transmittance of this film was as low as 42.3%, and the heat ray blocking efficiency measured by a heat ray blocking evaluation tester was 36.1%. The ultraviolet transmittance is greatly reduced, at 6.1%, and it is a film that also has the effect of blocking ultraviolet rays. The film characteristics...
Embodiment 3、4
[0102] [Example 3, 4, Comparative Example 1, 2]
[0103] Except having changed variously the compounding quantity of the ITO masterbatch, it carried out similarly to Example 2, and obtained the unstretched film of thickness 250 micrometers.
[0104] The film properties are summarized in Table 1. The higher the ITO content in the film, the lower the average light transmittance at 1800-2200 nm, and the higher the heat ray blocking efficiency is in inverse proportion. When the ITO content was 0.003% by weight (comparative example 1), the near-infrared transmittance was high at 92.4%, and the heat ray blocking efficiency was insufficient at 7.2%. When the ITO content is 0.30% by weight (Comparative Example 2), although it can be said that there is a heat ray blocking effect in this case, the haze is as high as 27.0%, and the transparency is insufficient.
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Abstract
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