Elastic spunbonded nonwoven and elastic nonwoven fabric comprising the same

a technology of elastic nonwoven fabric and elastic nonwoven fabric, which is applied in the direction of weaving, conjugated synthetic polymer artificial filaments, weaving, etc., can solve the problems of affecting web uniformity, affecting the uniformity of webs, and troublesome bigger filament bundling, so as to facilitate the whole spunbonding process and reduce friction and polymer tackiness

Inactive Publication Date: 2009-03-12
ALBIS INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]A slip agent selected for example from the group consisting of: erucamide, oleylamide, oleamide, and stearamide and used in a concentration from 50 ppm to 10 weight % can be successful added. During the processing of ther...

Problems solved by technology

Significant problems have been however encountered with this solution.
One of these problems is linked to the “sticky” nature of the elastomeric polymer, typically employed in producing elastic nonwoven materials.
In fact during the spunbonding process, the large air flow used for drawing the filament can make the filaments stick together and therefore the resulting web uniformity will be negatively affected.
Furthermore this bigger filament bundling can give trouble due to the blocking effect when the fabric is wound into rolls.
Another problem encountered when elastomeric polymers are used for making spunbonded nonwovens is the breakage of the filaments during extrusion and/or drawing ...

Method used

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  • Elastic spunbonded nonwoven and elastic nonwoven fabric comprising the same
  • Elastic spunbonded nonwoven and elastic nonwoven fabric comprising the same
  • Elastic spunbonded nonwoven and elastic nonwoven fabric comprising the same

Examples

Experimental program
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examples

Perforated Hydroentangled Elastic Nonwoven Fabrics

[0142]Different perforated composite nonwoven fabric (C / W, C / W / S and C / W / C) have been produced according to the manufacturing processes of FIGS. 3 and 4 (examples E-150-FP, E-151-FP, E-152-FP, E-153-FP, E-155-FP).

The compositions of these composite nonwoven fabrics are summarized in Table 7.

TABLE 7Perforated hydroentangled elastic nonwoven of the inventionElastictotalBottomspunbondedB.W.Layer,Layer WTop Layer,Examplesstructure(gsm)typegsm(see table 4)gsmtypegsmE-150-C / W60on line30E-7-830NONE0FPcardedPPE-151-C / W / S58on line20E-7-830Spunbonbded8FPcardedPPPPE-152-C / W / S110on line20E-7-1080Spunbonbded10FPcardedPPPPE-153-C / W / S90on line20E-7-660Spunbonbded10FPcardedPPPPE-155-C / W / C94on line20E-7-660Carded PP14FPcardedPPC: carded layerW: Elastic spunbonded layer of the inventionS: Spunbonded layerPP: Polypropylene

[0143]The outer carded layers (C) with low basis weight give textile appearance and soft touch to the final nonwoven fabric. This pr...

example

Elastic Spunbonded Nonwoven (W / M)

[0157]Samples of multilayer nonwoven (C / W / M / C) have been produced on a pilot plant, without bonding the layers together. Then the two outer carded layers were removed in order to keep only the elastic spunbonded (W) and meltblown (M) layers.

[0158]The elastic spunbonded layer W was made of bicomponent sheath / core filaments having the round cross-section of FIG. 1D. The core of the filaments was made (first polymeric component P) of a blend VM2125 (70 wt %) and VM6100 (30 wt %). The outer sheath of the filaments was made of VM 2125 (second polymeric component P′). The weight of the core was 90% of the total basis weight, and the weight of the sheath was 10% of the total basis weight. The basis weight of the elastic spunbonded layer (W) was 54 gsm.

[0159]In this example the material used for the elastic meltblown layer (M) was VM 2320. The basis weight of the meltblown layer (M) was 10 gsm. The elastic properties of the elastic spunbonded nonwoven (W / M) ...

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Abstract

The elastic spunbonded nonwoven has high elastic recovery properties and includes a plurality of multicomponent filaments. Each multicomponent filament, preferably of the sheath/core type, includes a first polymeric component extending along the length of the filament in at least a first section of the filament, and a second polymeric component extending along the length of the filament in at least a second section of the filament that is distinct from the first section. The first polymeric component comprises an elastic propylene-based olefin copolymer, and the second polymeric component comprises an elastic propylene-based olefin and has a melt flow rate that is higher than the melt flow rate of the first polymeric component. The elastic propylene-based olefin copolymer for the first polymeric component and for the second polymeric component includes propylene and from 10 to 25 weight % of one or more C2 and/or C4 to C10 alpha-olefin co-monomers.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a novel elastic spunbonded nonwoven made from multi-component filaments, and having a remarkable elastic recovery, and to an elastic nonwoven fabric comprising at least two superposed layers, one of which being constituted by the said novel elastic spunbonded nonwoven.PRIOR ART[0002]Elastic nonwoven fabrics advantageously offer the ability to conform to irregular shapes, and thus enable to increase fit and to allow more freedom and comfort, for example to body movements, than other textile fabrics with more limited extensibility. Elastic nonwoven fabrics are thus widely used in many industrial applications. Elastic nonwoven fabrics are used in the hygienic and personal care industry for making, for example, disposable diapers, child swim pants, child training pants, adult incontinent garments, sanitary napkins, wipes and other personal care products. Elastic nonwoven fabrics are also used in the manufacture of medical prod...

Claims

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Application Information

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IPC IPC(8): D04H13/00
CPCD01D5/0985D01F8/06D04H13/00D04H3/147D04H3/02Y10T442/602
Inventor BOSCOLO, GALLIANOMALTESE, ANTONINO
Owner ALBIS INT
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