Layer for use in a hepa filter element

A filter element and filter door technology, applied in the direction of filtration separation, membrane filter, dispersed particle filtration, etc., can solve the problems that the filter can no longer meet the HEPA requirements and unfavorable filtration efficiency, so as to improve the elasticity and avoid damage to the parts.

Active Publication Date: 2010-01-06
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The breaks form holes or perforations, which disadvantageously have a negative effect on the filtration efficiency
Such filters can no longer meet HEPA requirements, since unwanted particles can pass through the resulting damage

Method used

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  • Layer for use in a hepa filter element
  • Layer for use in a hepa filter element
  • Layer for use in a hepa filter element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] figure 1 A layer for use in a filter element is shown, comprising a first carrier layer 1 containing polypropylene fibers for stability and a second separating layer 2 containing polypropylene fibers. The polypropylene fibers of the separation layer 2 are at least partially electrostatically charged. The carrier layer 1 is likewise electrostatically chargeable and serves as a preseparator or prefilter. The carrier layer 1 and the separating layer 2 are designed as glass fiber-free nonwovens.

[0036] The carrier layer 1 has 110 g / m 2 weight per unit area, made of polypropylene fibers. The polypropylene fibers of the carrier layer 1 are designed as sheath-core fibers having an outer sheath of metallocene polypropylene and a core of pure polypropylene.

[0037] The separation layer has 36g / m 2 weight per unit area, made of polypropylene fibers. The polypropylene fibers are designed as electret microfibers. The polypropylene fibers of the separation layer 2 are appl...

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Abstract

The invention relates to a layer for use in a HEPA filter element. Said layer comprises a first support layer (1) for stabilization which contains polypropylene fibers, and a second deposition layer (2) which contains polypropylene fibers, wherein the polypropylene fibers of the deposition layer (2) are at least partially electrostatically charged, and wherein the support layer (1) and the deposition layer (2) are constructed as nonwoven material which is at least partially free of glass fiber. The layer according to the invention can be easily pleated while having excellent filter efficiency.

Description

technical field [0001] The invention relates to a layer for use in HEPA filter elements. Background technique [0002] Filter elements that meet the requirements of HEPA are known from the prior art. The HEPA filter element can be designed as a suspended solids filter, which is used to filter more than 99.9% of all particles larger than 0.1 μm to 0.3 μm from the air. [0003] Such particles can include viruses, dust that can be inhaled into the alveolar regions of the body, dust mites and their excrement, pollen, smoke particles, bacteria, various toxic dusts and aerosols. [0004] In addition, HEPA filter elements can also be used in the medical field, especially in operating theatres, intensive care units and laboratories. Furthermore, numerous applications are known in clean rooms and in nuclear technology. [0005] The European standard for the classification of HEPA filter elements is the DIN EN 1822 standard with filter classes H10 to H14 (HEPA). Particles with a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B32B27/02B32B5/26B32B27/32
CPCB01D46/521B01D2275/10B01D39/163B01D2239/0435D04H1/544B32B5/26B01D46/0032D04H1/541D04H13/00D04H1/4291B01D2239/0668D04H1/559D04H1/5412
Inventor K·维瑟尔A·格赖纳H·沃席沙卡J·阿道夫T-H·江
Owner CARL FREUDENBERG KG
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