Adhesive and Use for Attachment to Microfiber Garments
The present invention relates to an adhesive and its use for attachment to microfiber garments. The adhesive provides peel strength, complex modulus and glass transition properties suitable for this application.
1 . A disposable absorbent article for personal hygiene, the article having a wearer-facing surface and a garment facing surface, the garment facing surface comprising an adhesive, wherein the adhesive has, as measured by DMA testing method described in Example 3: a) a complex modulus, at 25° C. and frequency of 10 rad/sec., ranging from about 10000 to about 30000 Pa; b) a glass transition (Tg) temperature, at a frequency of 10 rad/sec., of less than about 10° C.; or c) a combination thereof.
2 . The disposable article of claim 1 wherein the complex modulus, at 25° C., ranges from about 11000 to about 26000 Pa.
3 . The disposable article of claim 2 wherein the complex modulus, at 25° C., ranges from about 12000 to about 24000 Pa.
4 . The disposable article of claim 1 wherein the glass transition temperature is less than about 8° C.
5 . The disposable article of claim 4 wherein the glass transition temperature is less than about 5° C.
6 . The disposable article of claim 1 wherein the adhesive comprises a first polymer.
7 . The disposable article of claim 6 wherein the first polymer has a melt index of greater than about 12 grams per 10 minutes as measured by ASTM Method D 1238, Condition G.
8 . The disposable article of claim 6 , wherein the first polymer is a styrenic block copolymer.
9 . The disposable article of claim 8 , wherein the styrenic block copolymer comprises a styrenic tri-block polymer.
10 . The disposable article of claim 9 wherein the styrenic block copolymer further comprises a styrenic di-block polymer, forming a styrenic tri-block/diblock polymer mixture.
11 . The disposable article of claim 10 wherein the styrenic di-block polymer is present at a concentration of at least 50%, by weight of the styrenic tri-block/diblock polymer mixture.
12 . The disposable article of claim 11 wherein the styrenic di-block polymer is present at a concentration of at least 60%, by weight of the styrenic tri-block/diblock polymer mixture.
13 . The disposable article of claim 12 wherein the styrenic di-block polymer is present at a concentration of at least 70%, by weight of the styrenic tri-block/diblock polymer mixture.
14 . The disposable article of claim 6 wherein the adhesive further comprises a second polymer.
15 . The disposable article of claim 14 wherein the second polymer has a melt index less than about 12 grams per 10 minutes as measured by ASTM Method D 1238, Condition G.
16 . The disposable article of claim 14 wherein the second polymer is a styrene-butadiene polymer.
17 . The disposable article of claim 1 , wherein the article is an incontinence product, panty liner or feminine napkin.