Strip for the delivery of an oral care active and methods for applying oral care actives

1. A strip of material for the delivery of an oral care active, comprising:

a) A stretchable structural elastic-like film backing layer including a strainable network having a first region and a second region, the first region providing a first, elastic-like resistive force to an applied axial elongation, and the second region providing a second distinctive resistive force to further applied axial elongation, thereby providing at least two stages of resistive forces in use;

b) an oral care composition disposed on the film, the oral care composition including an oral care active; and

c) an adhesive composition;

wherein the second region comprises a plurality of raised rib-like elements, said strip having a transverse axis, wherein said rib-like elements are substantially parallel to said transverse axis

said strip further comprising a release liner having a coating thereon such that the release liner exhibits less affinity for the adhesive composition than the adhesive composition exhibits for itself and the backing layer.

2. A strip according to claim 1 for use as a stretchable tooth treatment product, comprising:

a) a structural elastic-like film backing layer, having an average thickness of from about 0.1 mil to about 5.0 mil, the film including:

i. from about 50% to about 90%, by weight of the film, of high-density polyethylene; and

ii. from about 10% to about 50%, by weight of the film, of linear low-density polyethylene; and

b) an oral care composition disposed on the film, the oral care composition including:

i. from about 50% to about 99.9%, by weight of the oral care composition, of an adhesive composition which comprises carboxypolymethylene polymer;

ii. from about 0.1% to about 50%, by weight of the composition, of an oral care active; and

iii. said film exhibiting a Poisson's lateral contraction effect less than about 0.8 when the strip is subjected to about 25% elongation, or less than about 1.0 when subjected to about 50% elongation.

3. A stretchable tooth treatment product according to claim 2 wherein, the stretchable tooth treatment product exhibits a Young's Modulus of less than about 50 MPa, a strain at break of at least about 250%, and a strain at yield of at least about 30%; and

wherein the oral care active is hydrogen peroxide.

4. A strip according to claim 1 , wherein the oral care composition is a tooth whitener.

5. A strip according to claim 4 , wherein said whitener is a peroxide.

6. A strip according to claim 5 , wherein the peroxide is hydrogen peroxide.

7. A strip according to claim 1 for use as a stretchable tooth treatment product, comprising:

a) a structural elastic-like film backing layer, having an average thickness of from about 0.1 mil to about 5.0 mil, the film including:

i. from about 50% to about 90%, by weight of the film, of high-density polyethylene; and

ii. from about 10% to about 50%, by weight of the film, of linear low-density polyethylene; and

b) an oral care composition disposed on the film, the oral care composition including:

iv. from about 50% to about 99.9%, by weight of the oral care composition, of an adhesive composition which comprises carboxypolymethylene polymer;

v. from about 0.1% to about 50%, by weight of the composition, of an oral care active; and

vi. said film exhibiting a Poisson's lateral contraction effect less than about 0.8 when the strip is subjected to about 25% elongation, or less than about 1.0 when subjected to about 50% elongation;

wherein the oral care active in said composition is hydrogen peroxide.