Foamed light diffusion material and preparation method thereof
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A light diffusion and light diffusion agent technology, applied in the field of light diffusion materials, can solve the problems of poor light diffusion and easy sticking of products
Active Publication Date: 2021-09-07
NINGBO ZHETIE DAPHOON CHEM
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However, due to the small haze of PC, the light diffusion is poor
[0004] The related technology improves the light diffusivity of the PC substrate by foaming, but since PC contains a large amount of residual monomers such as phenol, bisphenol A, DPC, etc., the residual
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Embodiment 1-6
[0086] A method for preparing a foamed light-diffusing material, comprising the following steps:
[0087] s1, weigh sample mixture, according to the proportioning of Table 2, weigh PC02-10, antioxidant 1010 and release agent PETS to carry out batching;
[0088] s2. Prepare pellets, set parameters according to Table 4, add PC02-10, antioxidant 1010, and mold release agent PETS into Coperion STS35 twin-screw extruder, mix and extrude to obtain pellets;
[0089] s3. Injection foaming and single removal. According to the parameter settings in Table 6, add the pellets to Ningbo Haitian MA1200 injection molding machine for secondary mold injection foaming. During the injection molding process, inject supercritical carbon dioxide into the injection molding machine. In the barrel, after injection molding, during the molding process of the mold, supercritical carbon dioxide is cooled and foamed, stripped and stripped to obtain a foamed light diffusion material; the size of the mold use...
Embodiment 7-9
[0091] A method for preparing a foamed light-diffusing material, the difference from Example 5 is:
[0092] In step s1, according to the ratios in Table 2 and Table 3, weigh PC02-10 and PC02-20 to replace PC02-10;
[0093] In the s2 step, set the parameters of the extruder according to Table 4 and Table 5;
[0094] In step s3, set the parameters of the injection molding machine according to Table 6 and Table 7.
Embodiment 10-12
[0096] A method for preparing a foamed light-diffusing material, the difference from Example 7 is:
[0097] In step s1, according to the proportioning in Table 3, the light diffusing agent of Taiwan Changxing DF30B5 in Taiwan, China was weighed and added to the ingredients;
[0098] In the s2 step, set the parameters of the extruder according to Table 5;
[0099] In step s3, set the parameters of the injection molding machine according to Table 7.
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Abstract
The invention relates to the field of light diffusion materials, and particularly discloses a foamed light diffusion material and a preparation method thereof. The foamed light diffusion material is prepared from the components in parts by weight: 93-105 parts of PC, 0.1-0.5 part of antioxidant and 0.3-0.8 part of a release agent. The preparation method comprises the following steps that granules are prepared, and 93-105 parts by weight of PC, 0.1-0.5 part by weight of antioxidant and 0.3-0.8 part by weight of the release agent are uniformly mixed and extruded to obtain the granules; and injection molding foaming and monomer removal are carried out, supercritical carbon dioxide is injected in the injection molding process to carry out foaming and steam stripping monomer removal to obtain the foamed light diffusion material. The temperatures of different areas of a screw rod are 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 230 to 380 DEG C and 60 to 80 DEG C in sequence; and the pressure maintaining pressure is 60 to 100 MPa. The foamed light diffusion material can be used for processing an LED lamp housing, and has the advantages of high haze and low residual monomer content; and in addition, the preparation method has the advantage of reducing the possibility of mold sticking of a product in the processing process.
Description
technical field [0001] The present application relates to the field of light-diffusing materials, more specifically, it relates to a foamed light-diffusing material and a preparation method thereof. Background technique [0002] With the rapid development of the LED lamp industry, the market demand for light-diffusing materials used as materials for the production of LED lamp housings has also increased. Light-diffusing materials refer to materials that allow light to pass through and effectively diffuse light. It can convert point and line light sources into surface light sources with large scattering angles, good light guiding properties, uniform light transmission, and no glare. [0003] Polycarbonate (PC) is a kind of thermoplastic engineering plastic with excellent comprehensive performance. It has good impact resistance and dimensional stability. It has low water absorption, odorless, non-toxic, weak acid and alkali resistance, and excellent dielectric properties. It ...
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