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Hot melt wetness indicator adhesive composition with controllable color change

A composition, indicator technology, applied in the direction of film/sheet adhesive, adhesive type, rosin adhesive, etc.

Inactive Publication Date: 2004-01-28
ATO FINDLEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compositions of the present invention overcome deficiencies of existing humidity indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0072] The hot melt wetness indicating adhesives of Examples 1-2 were prepared using the components shown in Table 1 . The sample preparation total amount of embodiment 1,2 is 250g, and at 250 ° of F, carbon dioxide (CO 2 ) environment in a laboratory propeller type mixer consisting of a motor driven propeller, heating mantle, temperature control and approximately 1 quart sized container. In addition to the polymer and the pH indicator, the appropriate amount of each component calculated according to the ratio shown in Table 1 was poured into the container. The container is then heated to melt its contents. After the components are completely melted, the motor is turned on to start stirring. Next add the polymer to the mixer and continue mixing until the polymer dissolves. Finally the pH indicator was added and the contents were stirred for an additional 2 hours. The final mixtures are yellow in the dry state, which turns blue in color after they come into contact with bod...

Embodiment 3-7

[0077] The hot melt wetness indicator formulations of Examples 3-7 have rapid color change properties and are useful in the field of adult incontinence products that require replacement immediately after contact with the wearer. These examples were prepared with the components shown in Table 2.

[0078] components

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PUM

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Abstract

The present invention is directed towards a hot melt wetness indicator composition based on an ethylene-alkylacrylate-acrylic acid terpolymer. The wetness indicator composition comprises the terpolymer, a tackifying resin, a compatible surfactant having a HLB value less than 20 and a pH indicator or a dye that is capable of changing color when insulted with urine, as the primary ingredients. One embodiment of the present invention is to provide a wetness indicator that has excellent heat and environmental stability, improved fastness, vivid color change, easy manufacturing, and easy application. Another embodiment is directed towards a composition having a delayed response and therefore can withstand multiple insults daily.

Description

field of invention [0001] The present invention relates to a hot melt wetness indicator adhesive composition useful in disposable nonwoven absorbent articles. The indicator adhesive will indicate wetness when bodily fluids are expelled from the wearer. The adhesive can be formulated to have varying speeds of color change, from a nearly instantaneous reaction to a delayed color change of several hours. Background of the invention [0002] Disposable nonwoven absorbent products have broad acceptance in the care of infants, children and incontinent adults. Typical disposable nonwoven absorbent articles include diapers, training pants, adult incontinence pads and briefs, feminine napkins or pads, and tampons. Disposable nonwoven absorbent articles such as these function to receive and contain urine and other bodily fluids excreted by the wearer. These articles are worn next to or next to the skin of the wearer. [0003] A typical disposable nonwoven ...

Claims

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Application Information

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IPC IPC(8): A61F13/42A61F5/44A61F13/15A61F13/472A61F13/49A61L15/20A61L15/48A61L15/56A61L15/58C09J7/04C09J123/08C09J133/02C09J133/08C09J161/06C09J165/00C09J193/04
CPCA61L15/48A61L15/20A61L15/58A61L15/56C08L33/00
Inventor 王宝玉
Owner ATO FINDLEY
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