Melt-blown nonwoven fabric comprising ultra-fine fibers, production method therefor, and device for producing same

A technology of melt-blown non-woven fabrics and ultra-fine fibers, which is applied in the directions of melt-spinning, fiber processing, textiles and papermaking, etc., can solve the problems of inability to obtain particle capture and breathable melt-blown non-woven fabrics, and achieve particle capture. Excellent properties and air permeability, inhibition of wire breakage and entanglement, and high particle capture performance

Active Publication Date: 2013-10-30
TAPYRUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using this device to produce a nonwoven fabric made of ultrafine polypropylene fibers by the meltblown method, entanglement of fibers and adhesion of floating fibers to the obtained nonwoven fabric occur, and particle capture and air permeability cannot be obtained. Meltblown nonwovens with excellent performance on both sides

Method used

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  • Melt-blown nonwoven fabric comprising ultra-fine fibers, production method therefor, and device for producing same
  • Melt-blown nonwoven fabric comprising ultra-fine fibers, production method therefor, and device for producing same
  • Melt-blown nonwoven fabric comprising ultra-fine fibers, production method therefor, and device for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0125] Polypropylene PP [MFR (JISK7210, 2.16kg, 230°C): 1,550g / 10min, weight-average molecular weight (Mw): 7×10 prepared using a metallocene-based polymerization catalyst 4 , molecular weight distribution (Mw / Mn): 2.5, melting point: 155°C] as raw material, use Figure 1 to Figure 10 The shown apparatus produced a melt-blown nonwoven fabric with a width of 300 mm under the conditions shown in Table 1. It should be noted that the suction covers 3a, 3b are Image 6 in (S 1 +S 2 +S 3 ) are arranged symmetrically on the upstream side and the downstream side of the guide nozzle 1 in such a way that the half circumference of the suction drum 2 is drawn.

Embodiment 2

[0127] A melt-blown nonwoven fabric was produced in the same manner as in Example 1 except that the total gap TG was 0.7 mm (see Table 1).

Embodiment 3

[0129] A melt-blown nonwoven fabric was produced in the same manner as in Example 1 except that the polypropylene discharge amount per spinning nozzle was 6.7 mg / min and the rotational speed of the suction drum was 7.2 m / min (see Table 1).

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Abstract

An ultra-fine fiber melt-blown nonwoven fabric having excellent fine-particle trapping characteristics and air permeability is obtained by a melt-blowing method using: a die (1) having a plurality of ultra-fine spinning nozzles and an air nozzle; a rotating suction roll (2) having a porous outer peripheral surface and which sucks from the inside thereof; and a pair of upper and lower suction hoods (3a, 3b) covering the suction roll (2). In said melt-blow method: the interval between the die (1) and the suction roll (2) is set such that polymer fiber breakage or twisting is suppressed, within a range wherein the stretching of a molten polymer is completed and vibration of the obtained polymer fiber substantially does not occur; and the intervals between the outer peripheral surface of the suction roll (2) and the die-side end section of suction hoods (3a, 3b) are set such that fibers that have broken and attached or fused to the surface of the melt-blown nonwoven fabric can be removed by suction.

Description

technical field [0001] The present invention relates to a melt-blown nonwoven made of ultrafine fibers that suppress fiber entanglement and adhesion of floating fibers, have a small maximum pore diameter and an average pore diameter even when the cloth density (mesh) is small, and are excellent in both particle capture and air permeability Cloth, the manufacturing method of the melt-blown non-woven fabric and the device for manufacturing the melt-blown non-woven fabric. Background technique [0002] Melt-blown non-woven fabrics are composed of extremely fine fibers compared with spun-bonded non-woven fabrics, so they have excellent particle capture properties, and are used in liquid filters, gas filters, etc., and because of the insulation between electrodes and the retention of electrolyte Excellent, also used for battery separators, etc. Meltblown nonwoven fabrics are made of, for example, polyolefins that are excellent in processability and chemical resistance, but in or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/033D01D5/08D04H3/007
CPCD01D5/0985
Inventor 田村智彦河内涉
Owner TAPYRUS
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