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Light-diffusing PP resin molding material "FULL BRIGHT PP"
Lightfastness accelerated test results
Panasonic announced on April 5, 2016 that it has developed "FULL BRIGHT PP", a light-diffusing polypropylene (PP) resin molding material that can realize complex shape processing, and has been mass-produced since April. In addition to injection molding, this material also enables injection stretch blow molding, which contributes to the improvement of design freedom.
In general, LED lighting is provided with a diffuser plate for maintaining brightness evenly around the light source. Polycarbonate and acrylic resin are often used as the base material of the diffuser plate. In addition, the installation environment of the LED light source tends to be diversified. In this case, the base material of the diffusion plate is required to have higher light resistance, durability, and further light weight. Although the light-diffusive polycarbonate and the propylene-based resin have excellent processability, the specific gravity of these materials is high, and there is a problem that it is necessary to reduce the weight. Although the light diffusing PP resin molding material has a low specific gravity, it is a crystalline resin and therefore has a poor fluidity and is difficult to realize a complicated shape processing, and also has a problem of light resistance.
The FULL BRIGHT PP announced this time has been developed by Matsushita's proprietary melt control technology to increase the fluidity (MFR) to 25g/10min (20g/10min in previous products) to meet the requirements of injection stretch blow molding. In addition, 0.5mm thin-wall molding that was originally impossible to achieve can also be realized. At the same time, it can also be used for complex design such as deep drawing and curved surface finishing of LED lighting with high creativity.
By developing a resin design technology that imparts light resistance, weather resistance (water resistance, moisture resistance, and chemical resistance) is obtained while achieving excellent light resistance. The color change after treatment for 90 days in a 90-degree + UV environment corresponding to 10 years of outdoor use was ⊿E: 2 or less (the conventional material was ⊿E: 17). In addition, the specific gravity is 0.93, which can reduce the weight by 30% compared with polycarbonate (1.2) in the same volume. (Special Contributor: Kudosuke)
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