LED special high transmittance package adhesive 809A/B, dedicated to high transparency
LED package . According to the experts of China Epoxy Resin Industry Association (), its biggest feature is good water permeability, resistance to high temperature and no discoloration for 500 hours, low viscosity after mixing, good fluidity and easy defoaming. It can be used for a long time; it can be cured at medium or high temperature, and has a fast curing speed; it has small accommodation rate after curing, good moisture resistance, good gloss and high hardness; good mechanical strength of cured product, excellent electrical properties, heat and humidity resistance and atmosphere Ageing;
First, appearance and physical properties
809A color transparent lavender liquid, specific gravity 25 ° C 1.04g / cm3, viscosity 25 ° C 4000-6000 cps, shelf life 25 ° C, 6 months; 809B color transparent liquid, specific gravity 25 ° C 1.03g / cm3, viscosity 25 ° C200 -250 cps, shelf life 25 ° C, 3 months.
Second, the method of use
Mixing ratio: A: B = 100: 100 (weight ratio), mixing viscosity 25 ° C: 650-900 cps, gel time: 150 ° C × 85-105 seconds, usable time: 25 ° C × 4 hours, curing conditions: initial Curing 120 ° C -125 ° C × 35-45 minutes, post curing 120 ° C × 6-8 hours or 130 ° C × 6 hours; the surface of the product to be sealed needs to be kept dry and clean; according to the ratio and accurate weighing, please Remember that the ratio is weight ratio rather than volume ratio. After mixing A and B agents, mix well to avoid incomplete curing. After mixing evenly, please fill the glue in time, and try to use the mixed glue in the available time. Liquid; 809A/B can be used with diffusing agent and color paste. It is recommended to add: yellow paste PC-002 is 2-5%, red paste PC-003 is 2-6%, green paste PC-004 is 2-4 %, the diffusing agent DF-090 is 2-5%.
Third, the characteristics after curing
China Epoxy Resin Industry Association () experts said that the hardness of 86-89ShoreD, volume resistance 25 ° C 6.4 × 1015 Ohm-cm, surface resistance 25 ° C 2.8 × 1015 Ohm, withstand voltage 25 ° C24-26Kv / Mm, glass transition temperature 139 ° C, linear expansion coefficient 6.0 × 10 -5 cm / cm / ° C.
Fourth, matters needing attention
1. The main agent and curing agent of this product will start to react slowly after mixing, and the viscosity will gradually become higher. Therefore, please use it within the available time to avoid being too high to be used. Please enter the baking after filling the mold to avoid the surface moisture absorption and cause slow drying or brittleness;
2, the main agent 809A can be heated to reduce the viscosity to facilitate defoaming after mixing, but when the temperature is too high, the usable time will be shortened. The experts of China Epoxy Resin Industry Association () recommend a preheating temperature of 60 °C;
3. When the color paste is left for a long time, there will be precipitation and precipitation. Therefore, please preheat it at 80~120°C for 30~50 minutes before use and stir it evenly before use.
4, curing agent 809B is easy to absorb moisture, will absorb the moisture in the air to form a precipitate or crystal, so please use it immediately after use to avoid deterioration and can not be used;
5, when the good glue is temporarily used or there is still remaining, please seal it immediately to avoid the phenomenon that the surface moisture absorption causes the product quality to be bad;
6. This product is a mold release agent. It is not necessary to spray the release agent on the mold when it is used. If the release agent is sprayed, the release effect will be better, but it should be noted that it should not be excessive, so as not to affect the transparency of the product;
7. Do not get on your skin or eyes. If it gets on your skin, please wash it with detergent. If you accidentally get your eyes, please rinse with water before sending it to doctor. (small soup)
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