Nonwoven fabric air filter for internal combustion engine

An air filter, non-woven technology, applied in the filter material for multi-layer lamination of fibers and thermal bonding structure, in the field of filters, can solve the problem of inapplicability, insufficient performance of carbon fine particles, filter technology There is no record of content or effect

Inactive Publication Date: 2006-04-19
AMBIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are records in the text that can be used for filters, there is no record of specific technical content or effects applicable to filters
[0011] Moreover, although Patent Document 4 is about a pleated filter having a fiber diameter gradient, the fiber diameter ratio of the front and back is specified at 2 to 20 (expressed by the ratio of fiber thickness on the fluid outflow side / fiber thickness on the inflow side 0.05 to 0.5), in the case of the automotive air filter which is the object of the present invention, the performance is not sufficient for the carbon fine particles as the filter object, and it cannot be applied
Also, there is no record about airlaid nonwovens

Method used

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  • Nonwoven fabric air filter for internal combustion engine
  • Nonwoven fabric air filter for internal combustion engine
  • Nonwoven fabric air filter for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Polyester-based composite adhesive with a length of 5 mm, consisting of a core: polyethylene terephthalate, a sheath: a phthalic anhydride-isophthalic acid / ethylene glycol copolymer with a melting point of 150°C Synthetic fiber is the raw material fiber, and it is ejected from three discharge units located on the porous mesh conveyor belt, sucked into the air suction section located below the mesh conveyor belt, and forms a fiber layer on the mesh conveyor belt. At this time, from the upper layer side (fluid inflow side) to the lower layer side (fluid outflow side), sequentially laminate from the thick fiber layer to the fine fiber layer, and send the laminated fiber layer into a heat drying box, and use hot air to dry it. The fibers are combined to form an integrated non-woven fabric.

[0082] As the lower layer, the above-mentioned binder fiber of 2.2 dtex (thickness: 14.3 μm) was spun with the A discharge nozzle so that the weight per unit area was 110 g / m 2 . Also...

Embodiment 2

[0085] Composite with polyester fibers with a length of 5mm, consisting of a core: polyethylene terephthalate, a sheath: a phthalic anhydride-isophthalic acid / ethylene glycol copolymer with a melting point of 150°C The binder fiber is the raw material fiber, and the same method as in Example 1 is used to make a thermally bonded nonwoven fabric.

[0086] Spun separately as the lower layer, making 1.5dtex (thickness: 11.8μm) binder fibers form a weight per unit area of ​​100g / m 2 , As the middle layer, make 2.2dtex (14.3μm) form a unit area weight of 50g / m 2 , as the upper layer, 16.6dtex (thickness is 39.4μm) forming a unit area weight of 20g / m 2 .

[0087] After continuous lamination of each layer, send it to the hot air processor, and heat it with hot air at 165°C for 1 minute, so that the fiber interweaving points are thermally bonded, integrated, and calendered to make a thickness of 1.95mm and a weight per unit area of ​​180g / m 2 The air filter 2 of the present invent...

Embodiment 3

[0089] Nonwoven fabrics were produced in the same manner as in Examples 1 and 2.

[0090] As the bottom layer, 1.7dtex (thickness: 12.4μm) polyester binder fiber is used to form a basis weight of 95g / m 2 , as the lower layer, made of 4.4dtex (thickness: 20.2μm) polyester binder fiber to form a weight per unit area of ​​95g / m 2 , and as the middle layer, the polyester binder fiber of 6.6dtex (24.8μm) is formed with a weight per unit area of ​​30g / m 2 , and as the upper layer, the polyester binder fiber of 11dtex (32.0μm) is formed to have a weight per unit area of ​​30g / m 2 , were spun out separately.

[0091] After heat-treating the laminate with a hot air processor at 170°C, the thickness was adjusted by calendering to obtain a thickness of 2.4 mm and a weight per unit area of ​​250 g / m 2 The air filter 3 of the present invention. The Gurley stiffness in the longitudinal direction of this filter was 4.2 mN, and the shrinkage rate in the vertical and horizontal dimensions ...

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Abstract

A nonwoven fabric air filter for internal combustion engine produced by forming multiple layers composed mainly of polyester binder fibers of 1 to 10 mm fiber length according to airlaid nonwoven fabric production process and effecting thermal bonding thereof. In particular, a thin uniform nonwoven fabric air filter for internal combustion engine with pleats configuration, having an upper layer side (fluid inflow side) composed of thick fibers, having a lower layer side (fluid outflow side) composed of thin fibers, and having a last fluid outflow side layer composed 100% of polyester binder fibers, which thin uniform nonwoven fabric air filter is comprised of airlaid nonwoven fabrics whose weight per square meter, apparent density and dry-heat shrinkage factor after 300 hr at 100 1 / 2 C are 100 to 350 g / m<2>, 0.04 to 0.3 g / cm<3> and 3% or less, respectively. This thin uniform nonwoven fabric air filter is free from environmental pollution, realizes high dust collection efficiency and ensures prolonged life.

Description

technical field [0001] The present invention relates to filters for filtering solids made of non-woven fabric. More specifically, it relates to a nonwoven air filter material for air intake used in an internal combustion engine of an automobile or the like and used in an engine intake portion. [0002] Generally, non-woven air filters for internal combustion engines require strength when used, so longer fibers (for example, fiber length 30mm to 105mm) are used. As a method of bonding between fibers, there is a method of mechanically bonding fibers by needle punching or a water jet. A method of interweaving, a method of bonding fibers with a chemical adhesive such as a synthetic resin, or a method of mixing and thermally bonding binder fibers, and the like. [0003] The present invention relates to the use of air-laid non-woven fabric manufacturing method, the multi-layer lamination of short polyester binder fibers alone and / or the fibers mixed with other fibers, and the filtr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16
CPCB01D39/1623B01D39/16
Inventor 藤原万麿上阪茂实西川彰志山崎康行
Owner AMBIC
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