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100% synthetic nonwoven wipes

a technology wipes, applied in the field of synthetic nonwoven cloth, can solve the problems of increasing the cost of nonwoven cloth making, precursor web formation, increasing the stiffness of the web, etc., and achieves good machine and cross-directional strength and high absorption capacity.

Inactive Publication Date: 2005-06-23
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] 100% synthetic nonwoven webs known in the art typically do not have the absorptive capacity of webs that are at least partially non-synthetic. Thus, a 100% synthetic nonwoven web having good machine and cross-directional strengths, as well as softness and high absorptive capacity may be desired. Moreover, the provision of such improved material from a single 100% synthetic raw material via a continuous in-line process in the absence of precursor web formation may also be desirable. Additionally, a wipe comprising at least one layer of such a 100% synthetic nonwoven web may be desirable.

Problems solved by technology

In general, precursor web formation may add to the cost of making nonwoven webs by requiring the separate step of pre-bonding the fibers comprising the web.
For example, while pre-bonding may increase the durability of a nonwoven web, it may also increase its stiffness and, in turn, decrease its softness to the touch.
Processes known in the art for making nonwoven webs may produce nonwoven webs having sufficient strength in the machine direction; however, they may not produce nonwoven webs that also have sufficient strength in the cross-direction.
When such nonwoven webs are pulled in the cross-direction, they may stretch and ultimately tear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0122] S-Tex 194050HO, manufactured by BBA Fiberweb, Nashville, Tenn. U.S.A., is used as the starting nonwoven. S-Tex 194050HO is a 50 gsm spunlaid nonwoven made from 100% polypropylene with a fiber titre of 2.0 dtex (dtex is the unit denoting grams per 10,000 linear meters of fiber) and thermally bonded. No surface treatment is added to the nonwoven.

[0123] The absorptive capacity, expressed in grams of liquid composition per gram of wipe of S-Tex 194050HO for the two different liquid compositions is summarized in the table below:

Absorptive CapacityLiquid[g liquid composition / g wipe]Deionized Water0.150.1% Triton ™ X-100-PC in Deionized8.9Water

[0124] This example demonstrates the influence of the liquid on absorptive capacity.

example 2

[0125] Fibrella 7458, manufactured by Suominen Nonwovens, Nakkila, Finland, is used as the starting nonwoven. Fibrella 7458 is a 58 gsm carded nonwoven made from 60% polypropylene staple fiber and 40% viscose fiber, each with a fiber titre of 1.5 dpf (dpf is the unit denoting grams per 9,000 linear meters of fiber) and hydroentangled. No surface treatment is added to the nonwoven.

[0126] The absorptive capacity of Fibrella 7458 for the two different liquid compositions is summarized in the table below:

Absorptive CapacityLiquid[g liquid composition / g wipe]Deionized Water8.20.1% Triton ™ X-100-PC in Deionized8.5Water

[0127] When compared with Example 1, this example demonstrates that adding absorbent material to the nonwoven desensitizes the influence of the liquid composition on absorptive capacity.

example 3

[0128] Avspun™ Phobic, manufactured by Avgol Nonwoven Industries, Holon, Israel, is used as the starting nonwoven. Avspun™ Phobic is a 50 gsm spunlaid nonwoven made from 100% polypropylene with a fibre titre of 1.4 dpf and hydroentangled. No surface treatment is added to the nonwoven.

[0129] The absorptive capacity of Avspun™ Phobic for the two different liquid compositions is summarized in the table below:

Absorptive CapacityLiquid[g liquid composition / g wipe]Deionized Water0.140.1% Triton ™ X-100-PC in Deionized12.8Water

[0130] In conjunction with Example 1, this example demonstrates the influence of the liquid on absorptive capacity regardless of the method of nonwoven construction. This also illustrates that a significant increase in total absorptive capacity can be achieved by combining hydroentangled, continuous thermoplastic nonwovens and a low surface tension fluid.

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Abstract

The present invention relates to wipes comprising at least one layer of a 100% synthetic nonwoven web. The wipes may be provided as a single layer of nonwoven web, or may be provided in a laminate material, such as one comprising spunlaid-meltblown-spunlaid (SMS) webs. The 100% synthetic nonwoven webs of the present invention may be made via a process comprising a fiber laying step selected from the group consisting of spunlaying, meltblowing, carding, airlaying, wetlaying and combinations thereof. The 100% synthetic nonwoven webs of the present invention may be made via a process comprising a fiber bonding step selected from the group consisting of hydroentanglement, cold calendering, hot calendering, air thru bonding, chemical bonding, needle punching and combinations thereof. The nonwoven webs may also comprise one or more polyolefins. In one embodiment of the present invention, the nonwoven webs may be spunlaid and HET.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation in part of U.S. patent application Ser. No. 10 / 737,129, filed Dec. 15, 2003, which is a continuation of U.S. patent application Ser. No. 09 / 671,718, filed Sep. 27, 2000, which claims the benefit of U.S. Provisional Patent Application No. 60 / 156,286, filed Sep. 27, 1999.FIELD OF THE INVENTION [0002] This invention relates to 100% synthetic nonwoven wipes comprising at least one layer of a 100% synthetic nonwoven web. The wipes, which may be premoistened, can be used in a variety of applications. Wipe applications may include use in surface cleansing and surface cleansing products, as well as use as or in, absorbent products. BACKGROUND OF THE INVENTION [0003] Nonwoven webs and processes for making them are known in the art. Processes for making nonwoven webs may comprise three steps: fiber laying, precursor web formation, and fiber bonding. The fiber laying step may be comprised of the spunlaying, meltb...

Claims

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Application Information

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IPC IPC(8): A47L13/20A47L13/22A47L13/256A47L13/51B05B9/08B08B1/00C11D1/66C11D1/72C11D1/825C11D3/32C11D3/37C11D3/43C11D17/04D04H1/4291D04H3/16
CPCA45D37/00A45D2200/1018A45D2200/1036D04H13/002B08B1/00C11D17/049A47L13/16D04H1/492D04H1/54B08B1/143
Inventor GORLEY, RONALD THOMASPUNG, DAVID JOHNSHERRY, ALAN EDWARD
Owner THE PROCTER & GAMBLE COMPANY
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