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Nonwoven web with highly detailed and functionally advantageous bond pattern

a technology of nonwoven webs and bond patterns, applied in the direction of textiles and papermaking, thin material processing, transportation and packaging, etc., can solve the problems of reducing the tactile softness perceived by consumers, webs that are stiffer and less pliable, and webs that are reduced in number and/or sizes

Pending Publication Date: 2021-11-25
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, however, bonding greater numbers of fibers / filaments may cause the web to be stiffer and less pliable, tending to reduce tactile softness as perceived by consumers.
Additionally, bonding greater numbers of fibers / filaments may cause the web to have reduced numbers and / or sizes of inter-fiber passageways (pores) and thereby be less capable of absorbing or allowing liquid to pass therethrough.
However, limiting bond area percentage imposes a limitation on a technique by which a nonwoven web can be imparted with strength and structural integrity, which may be particularly important with lower basis weight nonwoven web materials.

Method used

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  • Nonwoven web with highly detailed and functionally advantageous bond pattern
  • Nonwoven web with highly detailed and functionally advantageous bond pattern
  • Nonwoven web with highly detailed and functionally advantageous bond pattern

Examples

Experimental program
Comparison scheme
Effect test

process example 1

[0142]A 20%:27.5%47.5%:5% blend of Lyondell-Basell PH835 polypropylene:Lyondell-Basell Metocene MF650W polypropylene:Exxon-Mobil PP3546 polypropylene:Polyvel S-1416 wetting agent is dry blended, to form a melt blend. The melt blend is heated to 475° F. through a melt extruder. A 15.5 inch wide Biax 12 row spinnerette with 192 nozzles per cross-direction inch, commercially available from Biax Fiberfilm Corporation, is utilized. 40 nozzles per cross-direction inch of the 192 nozzles have a 0.018 inch inside diameter while the remaining nozzles are solid, i.e. there is no opening in the nozzle. Approximately 0.19 grams per hole per minute (ghm) of the melt blend is extruded from the open nozzles to form meltblown filaments from the melt blend. Approximately 375 SCFM of compressed air is heated such that the air exhibits a temperature of about 395° F. at the spinnerette. Approximately 475 g / minute of Golden Isle (from Georgia Pacific) 4825 semi-treated SSK pulp is defibrillated through ...

process example 2

[0145]A 20%:27.5%47.5%:5% blend of Lyondell-Basell PH835 polypropylene:Lyondell-Basell Metocene MF650W polypropylene:Exxon-Mobil PP3546 polypropylene:Polyvel S-1416 wetting agent is dry blended, to form a melt blend. The melt blend is heated to about 405° F. through a melt extruder. A 15.5 inch wide Biax 12 row spinnerette with 192 nozzles per cross-direction inch, commercially available from Biax Fiberfilm Corporation, is utilized. 64 nozzles per cross-direction inch of the 192 nozzles have a 0.018 inch inside diameter while the remaining nozzles are solid, i.e. there is no opening in the nozzle. Approximately 0.21 grams per hole per minute (ghm) of the melt blend is extruded from the open nozzles to form meltblown filaments from the melt blend. Approximately 500 SCFM of compressed air is heated such that the air exhibits a temperature of about 395° F. at the spinnerette. Approximately 1000 g / minute of Golden Isle (from Georgia Pacific) 4825 semi-treated SSK pulp is defibrillated t...

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Abstract

A nonwoven web having an advantageous bond pattern impressed by a bonding pattern on a roller is disclosed. The bonding pattern is selected to have a bonding area percentage from 6 to 14 percent, which provides a desirable level of bonding of filaments and / or fibers for mechanical strength, while retaining desirable pliability and / or liquid handling characteristics. The bonding area is also relatively highly dispersed, which provides for a relatively greater number of bonded areas for the selected bonding area percentage. The greater number of bonded areas is believed to provide improved structural integrity while still retaining pliability and / or liquid handling characteristics, and also provide for enhanced visual detail and complexity. The relatively highly dispersed bonding area is believed to be particularly effective for nonwoven web materials having three or more layers, with outer layers of polymeric filaments, and even more particularly, one or two outer layers of fine filaments.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of, and claims priority under 35 U.S.C. § 120, to U.S. patent application Ser. No. 14 / 494,828, filed on Sep. 24, 2014, which claims the benefit, under 35 U.S.C. § 119(e), of U.S. Provisional Patent Application Ser. No. 61 / 881,699, filed on Sep. 24, 2013, the entire disclosures of both of which are fully incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]Nonwoven web materials are used as components in a variety of products such as but not limited to disposable diapers and absorbent pants, feminine hygiene pads, personal skin cleansing wipes (such as wet wipes and baby wipes), household cleaning wipes and dusting cloths. Nonwoven web materials are typically formed of natural or synthetic staple fibers, continuous filaments spun from polymeric resins, or a combination thereof. In manufacturing such material, fibers and / or filaments are typically deposited onto and collected to form a batt on...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H13/00D04H3/007D04H1/26D04H3/14D04H3/015D04H3/009D04H1/4291D04H1/435D04H1/4309D04H1/4266D04H1/485D04H1/541
CPCD04H13/00D04H3/007D04H1/26D04H3/14D04H3/015D04H3/009Y10T428/24826D04H1/435D04H1/4309D04H1/4266D04H1/485D04H1/5418D04H1/4291
Inventor CASTILLO, MARIO
Owner PROCTER & GAMBLE CO