发明名称 |
Extruded foamed polyolefin resin carrier for microorganisms in a fluidized bed |
摘要 |
A microorganism holding carrier for a fluidized bed is provided that includes an extruded foamed article having continuous cells and independent cells. The article is composed of a polyolefin resin as a main component. The continuous cells include open-cells which are opened to at least two portions of a surface of the article and a semi-open cell which are opened to only one portion of the surface of the article. A ratio of the total volume of the continuous cells to the total volume of the extruded foamed article (a volume ratio of the continuous cells) falls within a range of from 20% to 70%. Further, a ratio of the total volume of the open-cells to the total volume of the continuous cells (a volume ratio of open-cells) is 20% or more. The article may have an apparent density of 0.90 to 1.80 g/cm3 and an apparent volume from 2.0x10-3 to 5.0 cm3, and be in the shape of a column, or a tube having an outer diameter of 2 to 20 mm and a thickness of 5 to 30% of the outer diameter. During foam-extruding, a cylinder temperature of 180 DEG C. to 250 DEG C. and a die temperature of 200 DEG C. to 250 DEG C. are preferred. The polyolefin resin may include additives such as an inorganic filler, a foaming agent, and a blowing assistant for controlling foaming temperature of the foaming agent.
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申请公布号 |
US5962309(A) |
申请公布日期 |
1999.10.05 |
申请号 |
US19980006215 |
申请日期 |
1998.01.13 |
申请人 |
TSUTSUNAKA PLASTIC INDUSTRY CO., LTD. |
发明人 |
KUMAGAI, SHINYA;TANAKA, KAZUYASU |
分类号 |
C12N11/08;C02F3/10;(IPC1-7):C12M1/14;C02F3/00;C12N11/04 |
主分类号 |
C12N11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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