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Extensible paper web and method of forming

A paper web and elongation technology, applied in the field of disposable hygroscopic paper web and its manufacture, can solve the problem of high cost

Inactive Publication Date: 2001-05-23
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While increased loft and its attendant texture and softness features are desirable, the cost of retrofitting conventional paper machines with the necessary improvements is often prohibitive

Method used

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  • Extensible paper web and method of forming
  • Extensible paper web and method of forming
  • Extensible paper web and method of forming

Examples

Experimental program
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Effect test

example 1

[0075] The paper web of the present invention adopts similar Figure 7 The engaging platens shown are made. The mating platens are two mated platens approximately 5 inches wide, 12 inches long, and 0.75 inches thick formed by pouring epoxy-filled aluminum into machined metal molds. The teeth that engage the platen must be triangular in shape, ie tapered, measuring approximately 0.030 inches at the root and tapering to a radius of approximately 0.008 inches at the crest. Each tooth has a height of 0.060 inches and is set at a pitch of 0.030 inches. Each platen is fitted with mating holes and pins to ensure accurate and continuous fit of the platens when brought together. in correspondence Figure 7 The corresponding Figure 7 A series of grooves in the middle groove area 408 . The width of the grooves is 0.040 inches, and the center-to-center spacing of the parallel grooves is 0.275 inches.

[0076] A single ply web of northern softwood kraft fiber at a basis weight of 20...

example 2

[0080] The paper web of the present invention adopts Figure 10 made by the method shown. The rollers of pressure roller 500 were formed by machining grooves in two 10 inch long, 6 inch diameter steel rollers corresponding to rollers 501 and 502 shown in FIG. The machined slots define teeth corresponding to teeth 503 and 504 shown in FIG. 9 . The teeth are substantially triangular in shape, measuring approximately 0.030 inches at the root, tapering to a radius of approximately 0.004 to 0.008 inches at the crest. Each tooth has a height of 0.060 inches and is set at a pitch of 0.030 inches. A series of grooves corresponding to grooved areas 508 in FIG. 9 are machined into the roller corresponding to roller 502 in FIG. 9 . The width of the grooves is 0.040 inches, and the center-to-center spacing of the parallel grooves is 0.275 inches. The two rollers are set into meshing relationship to form a corresponding Figure 10 The pressure roller 500 shown is a toothed pressure ro...

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Abstract

A paper web of the present invention has a longitudinal centerline (L) and a transverse centerline (T), and comprises a plurality of first regions (60) and a plurality of second regions (66). The first regions (60) form boundaries separating the second regions (66), the first regions (60) being substantially in a plane of the paper web. The second regions (66) comprise a plurality of raised out-of-said-plane rib-like elements (74), the rib-like elements (74) of each second region being disposed parallel to a major rib axis and perpendicular to a minor rib axis. All or most of each first regions have both major rib axis and minor rib axis components. The first and second regions undergo geometric deformation when the web material is subjected to an applied elongation along at least one axis. A method of the present invention comprises the steps of providing a cellulosic substrate; providing a first platen (402) comprising toothed regions (407) and untoothed regions (408); providing a second platen (401) comprising toothed regions, the second platen (401) being aligned with the first platen such that the toothed regions of the first and second platens mesh when operably engaged; and pressing the cellulosic substrate between the first platen and the second platen such that the toothed regions deform said web to form regions of discrete fan-folded rib-like elements. Optionally, the cellulosic substrate can be moistened prior to the pressing step.

Description

field of invention [0001] The present invention relates to paper webs and methods for their manufacture. In particular, the present invention relates to disposable absorbent webs such as paper towels, wipes, tissue and toilet paper, and methods of making the same. Background technique [0002] Disposable paper products such as paper towels, wipes, facial tissue, and toilet paper have been used extensively for one or a limited number of applications. Depending on the intended use, such paper products generally require varying degrees of softness, absorbency and strength. In addition to softness, absorbency and strength, the overall appearance, feel and performance of disposable paper products are also important, especially in fine paper products. [0003] Two important properties that affect the overall appearance, feel and performance of disposable paper products are bulk and elongation. Bulk is defined as the ratio of paper thickness to basis weight. Bulk can be increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/18B31F1/07D21F3/02D21F11/00
CPCB31F2201/0738B31F1/07B31F2201/0784B29C55/18D21F11/006B31F2201/0733B31F2201/0743B31F2201/0756B31F2201/0758Y10T428/24694Y10T428/24826Y10T428/24612Y10T428/2457Y10T428/24446Y10T428/24686Y10T428/24711
Inventor 戴维·W·卡贝尔马克·R·理查兹
Owner THE PROCTER & GAMBLE COMPANY