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Tearable elastic composite articles

A technology of elastic composite materials and products, applied in adhesive dressings, non-adhesive dressings, dressings, etc., can solve the problems of increasing manufacturing costs and achieve the effect of improving the transverse tearing characteristics of the web

Inactive Publication Date: 2014-01-29
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of improving tearability also has disadvantages
For example, dedicated embossing equipment is required as part of the nonwoven cover web manufacturing process; otherwise, an additional separate embossing step is required, which increases manufacturing costs

Method used

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  • Tearable elastic composite articles
  • Tearable elastic composite articles
  • Tearable elastic composite articles

Examples

Experimental program
Comparison scheme
Effect test

example 1-10

[0037] The elastic composite article of the present invention was prepared substantially as described in column 15, lines 18-30 of U.S. Patent No. 7,854,716 (Schuren et al.), except as follows:

[0038] • The spandex yarn used was 210 denier, 10 epi.

[0039] • The draw ratio is between 2.5:1 and 3.5:1.

[0040] • Replace one of the nonwoven webs in each composite with a polyester woven scrim from Milliken & Company.

[0041] • Cut the resulting sheet material into strips (stretched dimensions) 3 inches wide and 5 yards long.

[0042] Specific compositions of composite articles, as well as properties of specific woven scrims are shown in Table 1 below. The properties of Examples 1 - 10 and comparative commercially available samples (Comparative Examples C-1 - C-5) were measured according to the description below. The results are shown in Table 2.

[0043] Table 1

[0044]

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PUM

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Abstract

The present disclosure provides self-adherent, elastic composite articles including a nonwoven fibrous coverweb, a woven scrim, and a plurality of spaced elastic yarns located between the coverweb and the woven scrim; these components are bonded together in a unified structure with a polymeric binder. The elastic composite articles generally demonstrate desirable hand-tear characteristics in the cross-web direction.

Description

Background technique [0001] For example, an elastic composite article may be provided from two cover webs with elastic threads or strands located between the cover webs. When the two cover webs are attached to each other and the elastic strands are stretched, if the elastic strands are released after the cover webs are attached to each other, the finished composite exhibits elasticity. Some elastic composite articles are self-adhesive, such as those disclosed in US Patent Nos. 3,575,782 (Hansen) and 4,984,584 (Hansen et al.). [0002] Self-adhesive elastic composite articles such as elastic wraps, tapes and bandages are widely used in first aid, sports medicine and veterinary applications. For example, they can be used to provide compressive support to wounds, or to hold compression cloths, medical pads, etc. in place on the human or animal body. Clinicians, especially pricking practitioners, can use self-adhesive elastic wraps to keep the gauze on the limb after blood colle...

Claims

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Application Information

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IPC IPC(8): A61F13/00B32B5/26B32B5/28B32B5/02A61F13/02
CPCB32B2260/046B32B2260/023B32B5/022B32B5/024B32B2307/54B32B2250/03B32B2250/20B32B2535/00A61F13/0273B32B5/26B32B2307/718B32B2307/51B32B5/28A61F13/00038B32B2307/582A61F13/01038A61F13/0008A61F13/0246
Inventor 西蒙·S·冯玛丽·L·布朗约翰·J·罗杰斯
Owner 3M INNOVATIVE PROPERTIES CO
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