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Self supporting pleatable web and an oil filter including the same

An oil filter, web technology, applied in membrane filters, filtration separation, chemical instruments and methods, etc., can solve problems such as lack of stiffness and hardness, collapse of pleats, inability to maintain groove patterns, etc., to achieve high rupture strength, Good burst strength and extended operating life effect

Active Publication Date: 2017-08-29
AHLSTROM MUNKSJO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Media made with a high content of synthetic fibers often tend to exhibit drape, and they lack sufficient stiffness and rigidity to cause the pleats to collapse without additional support
100% synthetic media disclosed in the art cannot maintain grooving patterns such as corrugated or pleated structures due to the thermal and mechanical properties of synthetic fibers

Method used

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  • Self supporting pleatable web and an oil filter including the same
  • Self supporting pleatable web and an oil filter including the same
  • Self supporting pleatable web and an oil filter including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Manufacturing processes for making filter media include, for example, wet-laying processes. In this process, the fibrous material is first comminuted, e.g. in a hydropulper, optionally in the presence of a fiber dispersant chemical additive, e.g. Surfactant to prevent fiber entanglement during handling. If the microglasses are broken, the pH of the hydropulper can also be adjusted with acid to a pH in the range of 2 to 5 to prevent clumping together of the microglass fibers and to promote uniform dispersion of the microglass fibers. Each desired fiber type is then added to the hydropulper in its correct proportion according to the furnish recipe. A preferred consistency (fiber weight:water volume) at the mixing stage is about 1 to 10%, especially about 5%.

[0148] After an optional refining stage, the fibrous furnish is then diluted down to a consistency of about 0.01-0.02% and formed into a web on a paper machine wire. Single or multi-layer headbox designs are avai...

Embodiment 2

[0160] Embodiment 2 (sample 3-6):

[0161] By using the method described in Example 1, melamine resin impregnated filter media (Samples 3-6) were prepared. For samples 5 and 6, an additional calendering step as discussed above for adjusting the porosity to the range of about 70-95% was used to prepare the corrugated filter media. The corrugation is imparted to the sheet at a temperature of about 180-220°C during the drying process and then at a temperature below 80°C after corrugation is complete. The compositions of Samples 3-6 are given in Table 2a below.

[0162] The properties of the filter media thus obtained are shown in Tables 3 and 4. The media of Sample 3 is suitable for use in, for example, motorcycle fuel media filters. The media of Sample 4 is self-supporting, washable and flat eg flat. It is suitable for eg lubricated (oil) and air applications. The media of Sample 5 is self-supporting, washable and corrugated, and suitable for use in, for example, lubricated...

Embodiment 2a

[0170] By using the method described in Example 1, filter media comprising binder fibers and impregnated with melamine resin (sample 7) or filter media comprising binder fibers (samples 8 to 9) were prepared. The compositions of Samples 7-9 and Comparative Samples 1-3 are given in Tables 5 and 6 below.

[0171]

[0172] The hot oil rupture strength properties of the filter media thus obtained (sample 7 and comparative samples 1-3) are as follows: figure 2 shown in .

[0173] Table 6. Summary of Batch Composition Samples 8-9.

[0174]

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Abstract

A fibrous media suitable for an oil filter comprising a fibrous web formed from synthetic fibers; optionally at least one additive, and a thermoset binder present at a concentration of at least 15 wt.-% by weight of the fibrous web and / or at least one binder fiber, wherein the synthetic fibers comprise up to 30 wt.-%, preferably up to 20 wt.-%, glass fibers, based on the total weight of the fibers. The fibers are bonded with the thermoset binder and / or the at least one binder fiber to form a web; and the fibrous media is capable of forming a self- supporting, pleated oil filter media which is capable of retaining pleats upon contact with oil having a temperature in the range encountered in a combustion engine.

Description

technical field [0001] The invention relates to filter media for oil filters. In particular, the present invention relates to filter media formed from synthetic fibers, optionally at least one additive and at least one thermosetting binder and / or at least one binder fiber, wherein the synthetic fibers comprise not more than 30% by weight, preferably not more than 20% by weight of glass fibers based on the total weight of fibers, wherein said fibers are bound with said thermosetting binder and / or said at least one binder fiber, to form a fibrous medium. The invention also relates to methods of making such filter media, as well as self-supporting pleated oil filters made from said media. Background technique [0002] Oil filters intended for use in internal combustion engines generally contain filter media with fibers obtained from wood pulp. Such wood pulp fibers are typically 1 to 7 mm long and 15 to 45 microns in diameter. Natural wood pulp is primarily the preferred ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D39/18B01D39/20
CPCB01D39/163B01D39/18B01D39/2024B01D2239/04B01D2239/1216B01D2239/086B01D2239/1233B01D2239/1291B01D2239/025B01D2239/10
Inventor 沈镇和金明圭权东炫金芝渊边姬良D·A·托波伦斯基K·R·汤森
Owner AHLSTROM MUNKSJO OYJ