Double component molten and jetted non-woven fabric and its making process

A technology of melt-blown nonwoven fabric and manufacturing method, which is applied in the field of nonwoven fabrics, can solve the problems that the filtration resistance cannot reach high-efficiency filter materials, cannot meet market demands, and has low strength, and achieves good thermal insulation performance, easy control, and hand feeling. soft effect

Inactive Publication Date: 2007-06-06
TIANJIN TEDA FILTERS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the field of filter materials, the currently used melt-blown filter materials are all PP single-component fibers. After electret, the filtration efficiency can reach 99.99%, but the strength of the product is low, and the filtration resistance cannot reach that of high-efficiency filter materials. requirements, can not meet the market demand

Method used

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  • Double component molten and jetted non-woven fabric and its making process
  • Double component molten and jetted non-woven fabric and its making process

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Pretreatment: first put the PET component slices into a fluidized bed pre-crystallizer, pre-crystallize at 160°C for 15 minutes, then send them into a filling dryer, and dry at 170°C for 2 hours;

[0035] (2) Manufacture of melt-blown nonwovens: under the protection of nitrogen, feed the pretreated PET component into one of the screw extruders, melt and extrude at 280 ° C, and then pass through the melt filter , metering pump into the melt-blown die head; feed PP directly to another screw extruder, melt and extrude at 230 ° C, and then send it to the same melt-blown die head through a melt filter and a metering pump The two melts meet at the melt-blown die at a ratio of 30 / 70, and can be made into side-by-side two-component melt-blown under the blowing of hot air at 290°C on both sides of the spinneret hole of the melt-blown die. The composite fibers are consolidated into the non-woven fabric by its own waste heat on the receiving device.

[0036] The basis weight ...

Embodiment 2

[0038] (1) Pretreatment: first put the PET component slices into a fluidized bed pre-crystallizer, pre-crystallize at 170°C for 10 minutes, then send them into a filling dryer, and dry at 170°C for 2 hours;

[0039] (2) Manufacture of melt-blown nonwovens: under the protection of nitrogen, feed the pretreated PET component into one of the screw extruders, melt and extrude at 285 ° C, and then pass through the melt filter , The metering pump is sent into the meltblown die head. Feed PP to another screw extruder, melt and extrude it at 235°C, and then send it to the same melt-blown die through a melt filter and a metering pump. The two melts meet at the spinneret at a ratio of 50 / 50, and can be made into side-by-side two-component composite melt-blown fibers under the blowing action of hot air at 300°C on both sides, and are placed on the receiving device by its The non-woven fabric is reinforced by its own waste heat.

[0040] The basis weight of the nonwoven product is 70g / m...

Embodiment 3

[0042] (1) Pretreatment: first put the PET component slices into a fluidized bed pre-crystallizer, pre-crystallize at 170°C for 10 minutes, then send them into a filling dryer, and dry at 170°C for 2 hours;

[0043] (2) Manufacture of melt-blown nonwovens: under the protection of nitrogen, feed the pretreated PET component into one of the screw extruders, melt and extrude at 290 ° C, and then pass through the melt filter , The metering pump is sent into the meltblown die head. Feed PP to another screw extruder, melt and extrude at 240°C, and then send it to the same melt-blown die through a melt filter and a metering pump. The two melts meet at the spinneret at a ratio of 70 / 30, and can form side-by-side two-component melt-blown composite fibers under the blowing action of 300°C hot air on both sides.

[0044] The basis weight of the nonwoven product is 100g / m 2 , fibers with a fineness below 1 μm contain 70%, the average fiber fineness is 0.5 μm, and the fibers are distribu...

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Abstract

The present invention relates to one kind of double component molten and jetted non-woven fabric and its making process. The non-woven fabric is made with parallel double molten and jetted fiber components. The fiber has titer of 0.01-2 micron, average titer of 0.5-0.7micron and components of titer below 1 micron accounting for 50-70 %, and consists of PP 30-70 wt% and PET 70-30 wt%. The making process of the non-woven fabric includes the following steps: 1. drying PET; and 2. melting and jetting to compound and spin PP/PET and to make the double component molten and jetted non-woven fabric. The non-woven fabric is used as heat insulating material and filtering material, and possesses high bulkiness, high softness, high air permeability, high heat retaining power and high filtering efficiency.

Description

technical field [0001] The invention relates to non-woven fabric technology, specifically a two-component melt-blown non-woven fabric made directly from PET / PP nano-micro-level side-by-side two-component melt-blown composite fibers and its manufacturing method, the main international patent classification number Proposed to be Int.Cl D01F1 / 09 (2006.01). Background technique [0002] Over the years, the application of chemical fibers in many different fields has increased dramatically, but at present there is no ideal single fiber that can meet all needs, which has led to the emergence of bicomponent fibers. Bi-component fiber usually refers to a fiber formed by extruding two polymers from at least two screw extruders and passing through special spinneret holes. Its structure can be sheath-core type or side-by-side type. or other types of cross-sectional structures. [0003] Meltblowing nonwovens is a versatile and cost-effective manufacturing method for the direct producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/00D04H3/03D04H3/16D01F6/06D01F6/62D01D5/00D01D5/32D01F8/06D01F8/14D04H5/00
Inventor 张伟力刘亚邢克琪杨文娟程博闻康卫民姚金波
Owner TIANJIN TEDA FILTERS
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