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 having a peel strength to microfibers ranging from about 1.96 to about 4.9 N at an adhesive coat weight of 20 g/m 2 using the T-Peel test method described in Example 2 from a microfiber substrate comprising 95% polyamide and 5% elastane, wherein the adhesive is substantially free of silicone.
2 . The disposable article of claim 35 wherein the complex modulus, at 25° C., ranges from about 11000 to about 26000 Pa.
3 . The disposable article of claim 36 wherein the complex modulus, at 25° C., ranges from about 12000 to about 24000 Pa.
4 . The disposable article of claim 35 wherein the glass transition temperature is less than about 8° C.
5 . The disposable article of claim 38 wherein the glass transition temperature is less than about 5° C.
6 . The disposable article of claim 35 wherein the adhesive comprises a first polymer.
7 . The disposable article of claim 40 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 40 , wherein the first polymer is a styrenic block copolymer.
9 . The disposable article of claim 42 , wherein the styrenic block copolymer comprises a styrenic tri-block polymer.
10 . The disposable article of claim 43 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 44 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 45 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 46 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 41 wherein the adhesive further comprises a second polymer.
15 . The disposable article of claim 48 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 48 wherein the second polymer is a styrene-butadiene polymer.
17 . The disposable article of claim 35 , wherein the article is an incontinence product, panty liner or feminine napkin.