OFweek Semiconductor Lighting Network News LED optoelectronics industry from the 2008 Beijing Olympics opening group showed her brilliance and power, detonated this industry in China. Today, in just a few short years, the LED optoelectronics industry has led LED lamps, ICs, PCB boards, power supplies, glues, plastic kits and related raw materials to form a mutual LED optoelectronic industry. Dependent, close supply chain relationships.
Here, as the marketing manager of Shenzhen Jinlian Technology Co., Ltd., the author has gone through more than five years of experience with the company, and is also used as an auxiliary material for potting, sealing, bonding, waterproof, moisture-proof, insulation, etc. in the LED photoelectric industry. —The silicone adhesive supplier, who wrote this article to share and exchange experiences with the LED industry's manufacturers of potting glue to better serve in-house applications.
First, LED silicone outdoor display potting and sealing performance requirements
Silicone potting adhesives are mostly used in outdoor environments, of course, in special places, in underwater or relatively humid environments. Therefore, the performance requirement is mainly to study "weather resistance", but the key words that are directly and closely related to weather resistance are: adhesion, adhesion, tensile strength, flexibility, high and low temperature aging, acid and alkali environment. And other professional terms.
Weather resistance is mainly reflected in the use of potting glue in various environments, such as: constant temperature, constant low temperature, constant humidity, as well as outdoor acid and alkali rain, sunlight, snow, etc. In addition, special applications require UV-resistant and high thermal conductivity, high resistance, high acid and alkali performance requirements for many years, the cured glue can maintain stable adhesion, adhesion, tensile strength, flexibility, insulation, waterproof Sex and so on.
Second, the LED outdoor screen potting glue in the application process, from the quality of the pros and cons, the main performance phenomenon
Jinlian Technology has been a developer and manufacturer of adhesives for nearly six years, especially in the application of large-scale potting applications for LED display manufacturers. It has accumulated rich experience and characteristics and quality of glue. The advantages are very well mastered and very fine. Here, I don't distinguish between products by good or bad. In order to be more refined, I will divide the quality into excellent (high-end), good (middle), ordinary (low-end), then the inferior products are called unqualified products or not. Stable product.
High-quality (high-end) products: high elasticity, high toughness, high tensile strength, high adhesion and adhesion, etc., after potting, can withstand various outdoor environmental tests, after one or two After the year or more, the performance is very stable, and the change in the shrinkage of the glue is found to be very small. Of course, there are special requirements for high-end performance, that is, the addition of matt, heat conduction, and flame retardant properties.
Good quality (mid-end) products: Compared with high-quality (high-end) products, it has certain properties of elasticity, flexibility, tensile strength, adhesion and adhesion, and can withstand various outdoor environmental tests. After one or two years or more, the performance of the gel was maintained to be good and stable, and the change in the shrinkage of the glue was found to be small.
Ordinary (low-end) products: have a certain elasticity, softness, and have a good tensile length but the tensile strength and strength are not very large, and the adhesion and adhesion are lower than that of a good quality potting glue. After one year or many years after potting, such products have obvious shrinkage rate, the greater the shrinkage rate, the lower the glue contains pure material, and the cost is relatively cheap; on the contrary, the smaller the shrinkage rate, the glue contains pure material. The higher the cost, the higher the cost. If the market is overly degraded by pure competition and the technology is immature, there may be unpredictable quality and safety hazards such as shedding, cracking, decomposing oil and so on.
Third, the LED optoelectronic industry as a hot industry is increasingly fierce competition, the relevant supply chain profit margins are also constantly compressing, in the face of cost and profit, there are quality problems, how to balance the selection of potting glue?
1. The user's choice of potting glue first considers the quality problem, that is, stability, reliability, as an electronic chemical auxiliary material, mainly used in outdoor environments, must withstand high temperature and low cold zone, acid and alkali rain, wind The long-term test of snow, sunshine, etc., and the weather resistance of the effect, is the positioning standard chosen by the user;
2, usually users have several positioning methods
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