According to the recent predictions from foreign authoritative organizations, in 2010, the global glass fiber production capacity was 4.715 million tons, of which 8.84 million tons were rovings without rovings: 85,000 tons in Europe, 790,000 tons in the Americas and 2.2 million tons in Asia. The production capacity of textile yarn is 875,000 tons: 45,000 tons in Europe, 180,000 tons in America, 600,000 tons in China and 50,000 tons in Japan. The above capacity is expected to achieve 70% to 80%. In 2010, the total actual production of glass fiber in the world is expected to reach around 330 to 3.8 million tons.
At present, foreign fiberglass new products are being developed at a high speed toward high-level, high value-added and multi-material composites. New products are changing with each passing day. The world has more than 5,000 varieties and more than 60,000 specifications. It is developing at an average annual rate of 1,000 to 1,500 varieties and specifications.
In the development of new glass fiber products, the United States is at the forefront of its peers in the world, and it is the fastest company to run with AGY. It is reported that the American company AGY announced on March 24, 2009 that it will introduce a low-loss glass fiber yarn L-Glass for printed circuit boards. The low dielectric constant (Dk) and low loss factor (Df) properties of the L glass fiber are suitable for circuit boards that require higher signal speeds and signal integrity than E glass fiber reinforced epoxy materials.
There are two traditional ways to manufacture low-loss laminates for high-speed applications. One is the use of high-performance epoxy and E-glass fibers, but this limits the Dk and Df performance of the product. The other is the use of resins with very low Dk/Df (such as PTFE) and ceramic fibers, plus very small amounts of E-glass fibers. Although this results in much lower Dk/Df performance, its material and manufacturing costs are high. Low glass fiber content also reduces the dimensional stability of the laminate. The use of L-glass fibers can achieve a very low Dk/Df for epoxy laminates, allowing PTFE-based laminates to use higher glass fiber content, thus overcoming these limitations.
At a frequency of 10 GHz, the dielectric constant of L glass fiber is 4.86 and the loss factor is 0.0050. In contrast, the E glass fiber has a dielectric constant of 6.81 at a frequency of 10 GHz and a loss factor of 0.0060. The thermal expansion coefficient of the L glass fiber is 3.9 ppm/°C, and that of the E glass fiber is 5.4 ppm/°C. This makes L glass fiber an ideal material for IC package substrates because the mismatch in thermal expansion coefficient and silicon in this application can be exacerbated by the thermal environment, causing circuit board defects.
AGY's L-glass fiber yarns are available in a variety of sizes and can be woven into low-loss glass cloth in accordance with 1060, 1080, 2113/2313 and 2116 fabric grades. In addition, according to market needs, it can also produce other number of yarn.
Subsequently, in August 2009, AGY introduced a high-performance Sl glass fiber roving for long fiber-reinforced thermoplastics (LFT). S-1 glass fiber was developed by AGY in response to the market demand for higher performance and lower cost materials. It bridges the cost/performance gap between E-glass fibers and higher-performance S-2 glass fibers. Its excellent balance of performance and cost enables manufacturers to make the most of the benefits of high-strength fiberglass and develop attractive new ones. use.
According to relevant studies, only 32% of S-1 glass fiber in LFT can provide performance equivalent to 60% E glass fiber reinforced products. Reducing the glass fiber content can improve the impact resistance and appearance quality, and make the composite material easier to mold. Conversely, increasing the S-1 glass fiber content can also utilize the high performance of this fiber to develop new applications. Sl glass fiber can be used for a variety of thermoplastics, such as polycarbonate, polyetherimide, polybutylene terephthalate, polyamide 66 and the like.
Compared with the traditional E glass fiber, S-1 glass fiber has better hydrolytic stability, 30% higher tensile strength and 18% higher tensile modulus. The supply of S-1 glass fiber products includes roving and chopped strands.
Recently, the company added a novel glass fiber biomaterial to its S-3 special glass fiber family. This biocompatible glass fiber, known under the trade name HPB, is suitable for long-term medical implant applications for more than 30 days. It is compatible with a variety of thermoplastic polymers such as polyetheretherketone, polyetherimide, polyphenylene ether, and the like.
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