Alumina ceramics are used to manufacture everything from tea cups to household insulation materials. The properties of foam plastics (such as density and impact strength) depend on the size and distribution of the cells. These two factors are controlled by the dispersion, percentage and volatility of the added blowing agent. Representative The blowing agents are pentane and isopentane. Flame retardant foamed polystyrene uses halogenated hydrocarbons as flame retardants, which are widely used as sound insulation and heat insulation layers in buildings and engineering applications. The foamable agent SAN has been used to make floating products and other gasoline-resistant products.
The following and good grades of low temperature impact resistance. Their Al2o3 Ceramic toughness is very good. The main varieties are: styrene-acrylonitrile copolymer (SAN), styrene-maleic anhydride copolymer (SMA), styrene-butadiene-styrene copolymer (SBS), styrene-acrylate copolymer, And the modified body with them as the base material. The heat distortion temperature of SAN is higher than that of transparent PS, its solvent resistance is also improved, and it has excellent penetration resistance. Rubber-modified SAN includes resins such as acrylonitrile-butadiene-styrene copolymer (ABS) and acrylonitrile-styrene-acrylate copolymer (ASA). The heat distortion temperature of S-MA is higher than that of transparent PS, which can reach 40°F. It has excellent transparency and gloss. SMA can be modified with rubber or reinforced with glass fiber. Various modifications of SBS and SBS can be used as components to improve impact resistance, flexibility and fluidity to produce sticky and anti-bending products such as cement, shoe soles, asphalt felt, etc. SBS is also used to produce transparent impact resistance PS. Styrene can be copolymerized with acrylic elastomer to produce transparent impact-resistant PS with excellent physical properties. The world's polystyrene (PS) production capacity has repeatedly hit new highs due to the rapid growth of production capacity in Asia in the past 20 years. By the end of the last century, the production capacity had exceeded 13 million tons per year. In the same period, the world's polystyrene consumption was only About 10 million tons/year, accounting for only about 77% of production capacity. Excluding the influence of various factors, the global operating rate of polystyrene plants has not exceeded 80%. Since 2000, the consumption growth of polystyrene in the world has slowed down. The consumption has only increased by 1.4% over 1999, and the growth rate is the lowest in recent years. Especially affected by the Asian financial crisis, the countries and regions with the most output reductions are also concentrated in Asia. In 2003, the world's total production capacity of polystyrene was 14.26 million tons/year, and the output was Al2o3 Ceramic 10.801 million tons/year. The production capacity in North America was 3.252 million tons/year, accounting for 22.8% of the world's total polystyrene production capacity. ; The output is 2.513 million tons/year, accounting for about 23.3% of the world`s total output; the production capacity in South America is 666,000 tons/year, accounting for about 4.8% of the world`s total production capacity; the output is 401,000 tons/year, accounting for about 3.7% of the world`s total output; Western Europe`s production capacity is 2.954 million tons/year, accounting for about 20.7% of Al2o3 Ceramic the world`s total production capacity; output is 2.627 million tons/year, accounting for about 24.3% of the world`s total output; Northeast Asia`s The production capacity is 4.892 million tons/year, accounting for about 34.3% of the world's total production capacity; the output is 3.738 million tons/year, accounting for about 34.6% of the world's total output; the production capacity in Southeast Asia is 973,000 tons/year, accounting for about 6.8% of the world's total production capacity; the output is 715,000 tons/year, accounting for about 6.6% of the world's total production; the production capacity of other regions is 1.525 million tons/year, accounting for 10.7% of the world's total production capacity; the output is 80.7% 10,000 tons/year, accounting for about 7.5% of the world's total output.
What is the expandability of alumina ceramics?
2020 12/14