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Anti-aging air-sterilization filter core

An air sterilization and anti-aging technology, which is applied in the direction of gasification substances, chemical instruments and methods, semi-permeable membrane separation, etc. Excellent steam sterilization performance, improved microbial retention rate, and good temperature resistance

Active Publication Date: 2016-03-23
上海一鸣过滤技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of polypropylene materials still has the above-mentioned problems of easy aging
Chinese patent CN101961607A discloses a folded polytetrafluoroethylene composite microporous membrane filter element, which employs polytetrafluoroethylene as a filter membrane, but the patent does not disclose the material selection of other structures in the filter element, so its anti-aging performance is not clear

Method used

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  • Anti-aging air-sterilization filter core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An anti-aging air sterilization filter element, such as figure 1 As shown, the filter element is composed of filter membrane 3, support layer 4, diversion layer 2, outer frame 1, end cap 6, center column 5, interface 7 and fins 8, diversion layer 2, filter membrane 3 and support layer 4 The W-shaped folding method is adopted, and the edges are sealed by hot melting, forming a whole barrel body, which is installed between the outer frame 1 and the central column 5, and the end faces are sealed by hot melting with end caps 6, and finally the joints are welded on both ends 7 and fins 8 form a complete filter element.

[0028] In this embodiment, the outer frame and the central column use polypropylene material with a glass fiber content of 25 wt% and an antioxidant content of 0.5 wt%. The thickness of the central column is 5mm, and the pressure resistance is >0.6MPa at 20°C. The end cap is made of pure polypropylene resin with a melting temperature of 164°C and an isotac...

Embodiment 2

[0031] The difference from Example 1 is that the outer frame and central column use polypropylene material with a glass fiber content of 28wt% and an antioxidant content of 0.5wt%. The thickness of the central column is 5.3mm, and the pressure resistance at 20°C is >0.6MPa. The end cap is made of pure polypropylene resin with a melting temperature of 166°C and an isotactic structure polypropylene content of 95.5wt%. Such a polypropylene end cap has good fluidity and is easy to seal the end face of the filter element. The penetration depth of the end cap is 1.1mm, and the filter membrane is completely wrapped by the slurry after melting the polypropylene. The filter element uses a PTFE membrane with a thickness of 50 μm, which passes through 10 7 CFU / cm 2 The ATCC19146 Liquid Bacteria Challenge, Downstream Liquid Sterility. Both the diversion layer and the support layer are made of 100wt% polyphenylene sulfide (PPS), and the weight is 100g / m 2 .

[0032] The filter element...

Embodiment 3

[0034] The difference from Example 1 is that the outer frame and central column use polypropylene material with a glass fiber content of 30wt% and an antioxidant content of 0.5wt%. The thickness of the central column is 5.5mm, and the pressure resistance at 20°C is >0.6MPa. The end cap is made of pure polypropylene resin with a melting temperature of 167°C and an isotactic structure polypropylene content of 96wt%. Such a polypropylene end cap has good fluidity and is easy to seal the end face of the filter element. The penetration depth of the end cap is 1.2mm, and the filter membrane is completely wrapped by the slurry after melting the polypropylene. The filter element uses a PTFE membrane with a thickness of 60 μm, which passes through 10 7 CFU / cm 2 The ATCC19146 Liquid Bacteria Challenge, Downstream Liquid Sterility. Both the diversion layer and the support layer are made of 100wt% polyphenylene sulfide (PPS), and the weight is 120g / m 2 .

[0035]The filter element of...

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Abstract

The invention relates an anti-aging air-sterilization filter core. The filter core is composed of a filter membrane, a supporting layer, a flow guide layer, an outer frame, an end cover, a central column, connection ports and fins. The flow guide layer, the filter membrane and the supporting layer are formed in a W-shaped folded manner with edges being sealed through hot melting to totally form a cylindrical body which is installed between the outer frame and the central column, wherein the end surface is sealed by means of the end cover in a hot melting manner. The connection ports and the fins are welded to the two ends to form the complete filter core. The outer frame and the central column are made from a polypropylene material being 25-30 wt% in glass fiber content and 0.5 wt% in anti-oxidizing agent content. The end cover is made from pure polypropylene resin being 164-167 DEG C in melting temperature and being 95-96% in content of isotactic polypropylene. The filter core is produced with PTFE membrane being 40-60 [mu]m in thickness. The flow guide layer and the supporting layer are produced with 100 wt% polyester or polyphenylene sulfide with gram weight being 80-120 g / m<2>. Compared with a filter core in the prior art, the filter core is good in temperature resistance, is excellent in resistance against steam sterilization, is high in gas throughput and low in resistance, and is high in reliability.

Description

technical field [0001] The invention relates to a filter element, in particular to an anti-aging air sterilization filter element. Background technique [0002] Filter elements for air sterilization are used to filter dust particles and microorganisms in compressed air. Usually polytetrafluoroethylene (PTFE) membrane is used as the filter medium, and other structural materials are ordinary polypropylene (PP). The disadvantage of this filter element is that the polypropylene material is easy to age. In the hot air, non-woven fabrics tend to "yellow and powder", the filter element integrity test fails and the ventilation volume decreases. [0003] Chinese patent CN103432914A discloses a polypropylene microporous membrane folded filter element, which includes flat-pressed double openings, a shell, a central rod, a folded filter element, a diversion support layer, and a filter membrane. The flat-pressed double openings are located at both ends of the shell, and There is a dive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D61/10A61L9/015
CPCA61L9/015B01D61/10B01D71/36
Inventor 吴昌飞卢忠宝周浩
Owner 上海一鸣过滤技术有限公司
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