Hot-melt adhesive substance

Abstract

The invention relates to a hot-melt adhesive substance for sticking together fibrous materials such as matted nonwovens or woven textiles with smooth substrate surfaces, such as plastic or metal films, and for laminating said materials. Said substance is characterized in that it contains at least one polyolefin which has been produced by polymerization in the presence of metallocene as a catalyst and has a ring/ball softening point of between 50 and 165° C. and a melting viscosity, measured at a temperature of 170° C., of between 20 and 40,000 mPa-s. The hot-melt adhesive substance can also contain at least one adhesive component and is used in a quantity of between 3 and 6 g/m.sup.2, preferably between 4 and 5.5 g/m.sup.2, for sticking a film to a nonwoven material during the production of hygiene items such as disposable nappies, baby nappies, incontinence products, panty liners and/or sanitary towels.

Claims

.[.1. A hot melt adhesive for adhesively bonding fibrous materials to one another or to smooth substrate surfaces, comprising at least one polyolefin prepared by polymerization in the presence of metallocene as catalyst and has a ring/ball softening point in the range from 50 to 165° C. and a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20,000 mPa.Math.s, wherein the at least one polyolefin is a copolymer of propylene with at least one or more further monomers selected from the group consisting of ethylene and linear or branched 1-olefins having from 4 to 20 carbon atoms, with the content of structural units derived from propylene being from 70 to 99.9% by weight and wherein the hot melt adhesive is free of plasticators, plasticizers or both..].

2. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin has a glass transition temperature T.sub.g of not more than −10° C. and a melt flow index MFI of greater than 30 g/10 min, measured in accordance with ISO 1133 at a temperature of 190° C. and under a load of 2.16 kg.

3. The .[.hot melt adhesive.]. .Iadd.method .Iaddend.as claimed in claim .[.1.]. .Iadd.8.Iaddend., wherein the hot melt adhesive is water- and solvent-free.

4. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin is present in an amount of from 2 to 100% by weight.

5. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., further comprising one or more tackifiers selected from the group of resins consisting of aliphatic, cycloaliphatic or aromatic hydrocarbon resins, polyterpene resins prepared by polymerization of terpenes in the presence of Friedel-Crafts catalysts, hydrogenated polyterpenes, copolymers and terpolymers of natural terpenes, styrene-terpene, α-methylstyrene-terpene copolymers, natural resins, modified rosins, resin esters, glyceryl esters of tree resins, pentaerithrityl esters of tree resins, tall oil resins and hydrogenated derivatives thereof, phenol-modified pentaerithrityl esters of resins and phenol-modified terpene resins and amorphous poly-alpha-olefins.

6. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the hot melt adhesive contains at least one .[.of.]. .Iadd.additional .Iaddend.resin in an amount, based on the total weight of the hot melt adhesive, in the range from 0 to 60% by weight and wherein .Iadd.the at least one additional resin is selected from the group consisting of .Iaddend.aliphatic, cycloaliphatic or aromatic hydrocarbon resins.

7. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., further comprising at least one constituent selected from the group consisting of pigments, antioxidants, odor binders, antimicrobial agents, colorants and fragrances.

8. A method for laminating fiber materials .Iadd.of a hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel as claimed in claim 12 .Iaddend.to one another, comprising the step of applying a hot melt adhesive between the fiber materials, wherein the holt melt adhesive comprises at least one polyolefin prepared by polymerization in the presence of metallocene as catalyst and has a ring/ball softening point in the range from 50 to 165° C. and a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20,000 mPa.Math.s, wherein the at least one polyolefin is a copolymer of propylene with at least one or more further monomers selected from the group consisting of ethylene and linear or branched 1-olefins having from 4 to 20 carbon atoms, with the content of structural units derived from propylene being from 70 to 99.9% by weight and wherein the hot melt adhesive is free of .[.plasticators,.]. plasticizers .[.or both.]..

9. The method as claimed in claim 8, wherein the hot melt adhesive is applied in an amount of from 1 to 6 g/m.sup.2.

10. The method as claimed in claim 8, wherein fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof.

.[.11. The method as claimed in claim 8, wherein the film is selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene..].

12. A hygiene article, a panty diaper, diaper, incontinence product, panty liner or sanitary towel comprising a hot melt adhesive, wherein the holt melt adhesive comprises at least one polyolefin prepared by polymerization in the presence of metallocene as catalyst and has a ring/ball softening point in the range from 50 to 165° C. and a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20,000 mPa.Math.s, wherein the at least one polyolefin is a copolymer of propylene with at least one or more further monomers selected from the group consisting of ethylene and linear or branched 1-olefins having from 4 to 20 carbon atoms, with the content of structural units derived from propylene being from 70 to 99.9% by weight and wherein the hot melt adhesive is free of .[.plasticators,.]. plasticizers .[.or both.]..

.[.13. The hot melt adhesive as claimed in claim 1, wherein the at least one polyolefin has a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20 000 mPa.Math.s..].

14. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in .[.one.]. claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 800 to 10 000 g/mol, and a weight average molar mass M.sub.w in the range from 1600 to 30 000 g/mol.

15. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in .[.one.]. claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 1000 to 5000 g/mol, and a weight average molar mass M.sub.w in the range from 2000 to 20 000 g/mol.

16. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the linear or branched 1-olefins having from 4 to 10 carbon atoms.

17. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the content of structural units derived from propylene being from 80 to 99% by weight.

18. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin is present in an amount of from 30 to 95% by weight.

19. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin is present in an amount of from 50 to 85% by weight.

20. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the at least one polyolefin is present in an amount of from 70 to 80% by weight.

21. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the hot melt adhesive contains at least one .[.of.]. .Iadd.additional .Iaddend.resin in an amount, based on the total weight of the hot melt adhesive, in the range from 10 to 50% by weight.

22. The .[.hot melt adhesive.]. .Iadd.hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel .Iaddend.as claimed in claim .[.1.]. .Iadd.12.Iaddend., wherein the hot melt adhesive contains at least one .[.of.]. .Iadd.additional .Iaddend.resin in an amount, based on the total weight of the hot melt adhesive, in the range from 15 to 30% by weight.

23. A diaper, panty diaper, incontinence product, panty liner or sanitary towel produced with a hot melt adhesive, wherein the holt melt adhesive comprises at least one polyolefin prepared by polymerization in the presence of metallocene as catalyst and has a ring/ball softening point in the range from 50 to 165° C. and a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20,000 mPa.Math.s, wherein the at least one polyolefin is a copolymer of propylene with at least one or more further monomers selected from the group consisting of ethylene and linear or branched 1-olefins having from 4 to 20 carbon atoms, with the content of structural units derived from propylene being from 70 to 99.9% by weight and wherein the hot melt adhesive is free of .[.plasticators,.]. plasticizers .[.or both.]..

24. The method as claimed in claim 8, wherein the hot melt adhesive is applied in an amount of from 3 to 5.5 g/m2.

.Iadd.25. A hygiene article comprising a first fiber material laminated by adhesive bonding to a film or to a second fiber material by a hot melt adhesive disposed between and in contact with the first fiber material and the film or the second fiber material, the laminated first fiber material and film or second fiber material forming part of the hygiene article, wherein the hot melt adhesive comprises at least one polyolefin prepared by polymerization in the presence of metallocene as catalyst and having a ring/ball softening point in the range from 50 to 165° C. and a melt viscosity measured at a temperature of 170° C. in the range from 100 to 20,000 mPa.Math.s, wherein the at least one polyolefin is a copolymer of propylene and ethylene with the content of structural units derived from propylene being from 70 to 99.9% by weight, and wherein the hot melt adhesive is free of plasticizers. .Iaddend.

.Iadd.26. The hygiene article as claimed in claim 25, wherein the at least one polyolefin has a glass transition temperature T.sub.g of not more than −10° C. and a melt flow index MFI of greater than 30 g/10 min, measured in accordance with ISO 1133 at a temperature of 190° C. and under a load of 2.16 kg. .Iaddend.

.Iadd.27. The hygiene article as claimed in claim 25, wherein the hot melt adhesive is water- and solvent-free. .Iaddend.

.Iadd.28. The hygiene article as claimed in claim 25, wherein the hot melt adhesive has a viscosity in the range of 200 to 10000 mPa.Math.s measured at a temperature of 150° C. .Iaddend.

.Iadd.29. The hygiene article as claimed in claim 25, wherein the hot melt adhesive has a viscosity in the range of 120 to 9000 mPa.Math.s measured at a temperature of 170° C. .Iaddend.

.Iadd.30. The hygiene article as claimed in claim 25, wherein the hot melt adhesive has a viscosity in the range of 130 to 8000 mPa.Math.s measured at a temperature of 170° C. .Iaddend.

.Iadd.31. The hygiene article as claimed in claim 25, wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 500 to 20000 g/mol, and a weight average molar mass M.sub.w in the range from 1000 to 40000 g/mol. .Iaddend.

.Iadd.32. The hygiene article as claimed in claim 25, wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 800 to 10000 g/mol, and a weight average molar mass M.sub.w in the range from 1600 to 30000 g/mol. .Iaddend.

.Iadd.33. The hygiene article as claimed in claim 25, wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 1000 to 5000 g/mol, and a weight average molar mass M.sub.w in the range from 2000 to 20000 g/mol. .Iaddend.

.Iadd.34. The hygiene article as claimed in claim 25, wherein in the at least one polyolefin the content of structural units derived from propylene is from 80 to 99% by weight. .Iaddend.

.Iadd.35. The hygiene article as claimed in claim 25, wherein the at least one polyolefin is present in an amount of from 30 to 95% by weight. .Iaddend.

.Iadd.36. The hygiene article as claimed in claim 35, wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 500 to 20000 g/mol, and a weight average molar mass M.sub.w in the range from 1000 to 40000 g/mol. .Iaddend.

.Iadd.37. The hygiene article as claimed in claim 25, wherein the at least one polyolefin is present in an amount of from 50 to 85% by weight. .Iaddend.

.Iadd.38. The hygiene article as claimed in claim 25, wherein the at least one polyolefin is present in an amount of from 70 to 80% by weight. .Iaddend.

.Iadd.39. The hygiene article as claimed in claim 25, wherein the hot melt adhesive further comprises at least one tackifier resin in an amount, based on the total weight of the hot melt adhesive, up to 60% by weight. .Iaddend.

.Iadd.40. The hygiene article as claimed in claim 25, wherein the hot melt adhesive further comprises at least one tackifier resin in an amount, based on the total weight of the hot melt adhesive, in the range from 10 to 50% by weight. .Iaddend.

.Iadd.41. The hygiene article as claimed in claim 40, wherein the at least one tackifier resin is at least one aliphatic, cycloaliphatic or aromatic hydrocarbon resin. .Iaddend.

.Iadd.42. The hygiene article as claimed in claim 40, wherein the at least one tackifier resin is at least one resin selected from the group consisting of polyterpene resins prepared by polymerization of terpenes in the presence of Friedel-Crafts catalysts, hydrogenated polyterpenes, copolymers and terpolymers of natural terpenes, styrene-terpene, α-methylstyrene-terpene copolymers, natural resins, modified rosins, resin esters, glyceryl esters of tree resins, pentaerithrityl esters of tree resins, tall oil resins and hydrogenated derivatives thereof, phenol-modified pentaerithrityl esters of resins and phenol-modified terpene resins and amorphous poly-alpha-olefins. .Iaddend.

.Iadd.43. The hygiene article as claimed in claim 40, wherein the at least one polyolefin is present in an amount of from 50 to 85% by weight, and wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 500 to 20000 g/mol, and a weight average molar mass M.sub.w in the range from 1000 to 40000 g/mol. .Iaddend.

.Iadd.44. The hygiene article as claimed in claim 25, wherein the hot melt adhesive further comprises at least one tackifier resin in an amount, based on the total weight of the hot melt adhesive, in the range from 15 to 30% by weight. .Iaddend.

.Iadd.45. The hygiene article as claimed in claim 25, wherein the at least one polyolefin has a number average molar mass M.sub.n in the range from 800 to 10000 g/mol, and a weight average molar mass M.sub.w in the range from 1600 to 30000 g/mol; the at least one polyolefin is present in the hot melt adhesive in an amount of from 50 to 85% by weight; wherein the hot melt adhesive has a viscosity in the range of 130 to 8000 mPa.Math.s measured at a temperature of 170° C.; and the hot melt adhesive is water- and solvent-free. .Iaddend.

.Iadd.46. The hygiene article as claimed in claim 45, wherein the hot melt adhesive further comprises at least one tackifier resin in an amount, based on the total weight of the hot melt adhesive, in the range from 10 to 50% by weight, the at least one tackifier resin being at least one aliphatic, cycloaliphatic or aromatic hydrocarbon resin. .Iaddend.

.Iadd.47. The hygiene article as claimed in claim 46, wherein in the at least one polyolefin the content of structural units derived from propylene is from 80 to 99% by weight. .Iaddend.

.Iadd.48. The hygiene article as claimed in claim 45, wherein in the at least one polyolefin the content of structural units derived from propylene is from 80 to 99% by weight. .Iaddend.

.Iadd.49. The hygiene article as claimed in claim 48, wherein the at least one polyolefin has a glass transition temperature T.sub.g of not more than −10° C. and a melt flow index MFI of greater than 30 g/10 min, measured in accordance with ISO 1133 at a temperature of 190° C. and under a load of 2.16 kg. .Iaddend.

.Iadd.50. The hygiene article as claimed in claim 25, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the second fiber material and laminating the first fiber material to the second fiber material. .Iaddend.

.Iadd.51. The hygiene article as claimed in claim 50, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof; and the second fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof. .Iaddend.

.Iadd.52. The hygiene article as claimed in claim 35, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the second fiber material and laminating the first fiber material to the second fiber material. .Iaddend.

.Iadd.53. The hygiene article as claimed in claim 36, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the second fiber material and laminating the first fiber material to the second fiber material. .Iaddend.

.Iadd.54. The hygiene article as claimed in claim 45, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the second fiber material and laminating the first fiber material to the second fiber material. .Iaddend.

.Iadd.55. The hygiene article as claimed in claim 35, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the film and laminating the first fiber material to the film. .Iaddend.

.Iadd.56. The hygiene article as claimed in claim 49, wherein the hot melt adhesive is disposed between and in contact with the first fiber material and the film and laminating the first fiber material to the film. .Iaddend.

.Iadd.57. A method for making the hygiene article as claimed in claim 25, the method comprising laminating the first fiber material to the second fiber material by disposing the hot melt adhesive between and in contact with the first fiber material and the second fiber material. .Iaddend.

.Iadd.58. The method as claimed in claim 57, wherein the hot melt adhesive is disposed between the first fiber material and the second fiber material in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.59. A method for making the hygiene article as claimed in claim 26, the method comprising laminating the first fiber material to the second fiber material by disposing the hot melt adhesive between and in contact with the first fiber material and the second fiber material. .Iaddend.

.Iadd.60. The method as claimed in claim 59, wherein the hot melt adhesive is disposed between the first fiber material and the second fiber material in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.61. A method for making the hygiene article as claimed in claim 35, the method comprising laminating the first fiber material to the second fiber material by disposing the hot melt adhesive between and in contact with the first fiber material and the second fiber material. .Iaddend.

.Iadd.62. A method for making the hygiene article as claimed in claim 36, the method comprising laminating the first fiber material to the second fiber material by disposing the hot melt adhesive between and in contact with the first fiber material and the second fiber material. .Iaddend.

.Iadd.63. A method for making the hygiene article as claimed in claim 49, the method comprising laminating the first fiber material to the second fiber material by disposing the hot melt adhesive between and in contact with the first fiber material and the second fiber material. .Iaddend.

.Iadd.64. The hygiene article as claimed in claim 25, wherein the first fiber material is laminated to the film by the hot melt adhesive. .Iaddend.

.Iadd.65. The hygiene article as claimed in claim 64, first the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.66. The hygiene article as claimed in claim 64, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof, and wherein the film is a film of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene. .Iaddend.

.Iadd.67. The hygiene article as claimed in claim 64, wherein the hygiene article is in the form of a panty diaper, a diaper, an incontinence product, a panty liner, or a sanitary towel. .Iaddend.

.Iadd.68. The hygiene article as claimed in claim 26, wherein the first fiber material is laminated to the film by the hot melt adhesive. .Iaddend.

.Iadd.69. The hygiene article as claimed in claim 68, wherein the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.70. The hygiene article as claimed in claim 68, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof, and wherein the film is a film of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene. .Iaddend.

.Iadd.71. The hygiene article as claimed in claim 70, wherein the hygiene article is in the form of a panty diaper, a diaper, an incontinence product, a panty liner, or a sanitary towel. .Iaddend.

.Iadd.72. The hygiene article as claimed in claim 36, wherein the first fiber material is laminated to the film by the hot melt adhesive. .Iaddend.

.Iadd.73. The hygiene article as claimed in claim 72, first the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.74. The hygiene article as claimed in claim 72, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof, and wherein the film is a film of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene. .Iaddend.

.Iadd.75. The hygiene article as claimed in claim 72, wherein the hygiene article is in the form of a panty diaper, a diaper, an incontinence product, a panty liner, or a sanitary towel. .Iaddend.

.Iadd.76. The hygiene article as claimed in claim 45, wherein the first fiber material is laminated to the film by the hot melt adhesive. .Iaddend.

.Iadd.77. The hygiene article as claimed in claim 76, first the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.78. The hygiene article as claimed in claim 76, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof, and wherein the film is a film of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene. .Iaddend.

.Iadd.79. The hygiene article as claimed in claim 76, wherein the hygiene article is in the form of a panty diaper, a diaper, an incontinence product, a panty liner, or a sanitary towel. .Iaddend.

.Iadd.80. The hygiene article as claimed in claim 76, wherein the at least one polyolefin of the hot melt adhesive has a glass transition temperature T.sub.g of not more than −10° C. and a melt flow index MFI of greater than 30 g/10 min, measured in accordance with ISO 1133 at a temperature of 190° C. and under a load of 2.16 kg. .Iaddend.

.Iadd.81. The hygiene article as claimed in claim 80, wherein the hot melt adhesive further comprises at least one tackifier resin in an amount, based on the total weight of the hot melt adhesive, in the range from 10 to 50% by weight, the at least one tackifier resin being at least one aliphatic, cycloaliphatic or aromatic hydrocarbon resin. .Iaddend.

.Iadd.82. The hygiene article as claimed in claim 81, wherein the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.83. The hygiene article as claimed in claim 82, wherein the first fiber material is selected from the group consisting of cotton, wool, silk, cellulose, linen, polyamide, polyester, polyethylene terephthalate, polypropylene terephthalate, polyvinyl chloride, propylene, polyethylene or mixtures thereof, and wherein the film is a film of a material selected from the group consisting of polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride and polystyrene. .Iaddend.

.Iadd.84. A method for making the hygiene article as claimed in claim 25, the method comprising laminating the first fiber material to the film by disposing the hot melt adhesive between and in contact with the first fiber material and the film. .Iaddend.

.Iadd.85. The method as claimed in claim 84, wherein the hot melt adhesive is disposed between the first fiber material and the film in an amount in the range of from 1 to 6 g/m.sup.2. .Iaddend.

.Iadd.86. A method for making the hygiene article as claimed in claim 35, the method comprising laminating the first fiber material to the film by disposing the hot melt adhesive between and in contact with the first fiber material and the film. .Iaddend.

.Iadd.87. A method for making the hygiene article as claimed in claim 36, the method comprising laminating the first fiber material to the film by disposing the hot melt adhesive between and in contact with the first fiber material and the film. .Iaddend.

.Iadd.88. A method for making the hygiene article as claimed in claim 49, the method comprising laminating the first fiber material to the film by disposing the hot melt adhesive between and in contact with the first fiber material and the film. .Iaddend.

.Iadd.89. The hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel as claimed in claim 12, wherein the at least one polyolefin is a homopolymer of propylene or a copolymer of propylene and ethylene. .Iaddend.

.Iadd.90. The hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel as claimed in claim 89, wherein the at least one polyolefin is a copolymer of propylene with from 0.1-30% by weight ethylene. .Iaddend.

.Iadd.91. The hygiene article, panty diaper, diaper, incontinence product, panty liner or sanitary towel as claimed in claim 89, wherein the at least one polyolefin is a homopolymer of propylene. .Iaddend.

.Iadd.92. The hygiene article as claimed in claim 25, wherein the at least one polyolefin is a homopolymer of propylene or a copolymer of propylene and ethylene. .Iaddend.

.Iadd.93. The hygiene article as claimed in claim 92, wherein the at least one polyolefin is a copolymer of propylene with from 0.1-30% by weight ethylene. .Iaddend.

.Iadd.94. The hygiene article as claimed in claim 92, wherein the at least one polyolefin is a homopolymer of propylene. .Iaddend.

Description

EXAMPLES

(1) The following examples illustrate the invention but do not restrict it to the specific embodiments described.

(2) Percentages are, unless indicated otherwise, by weight.

(3) The melt viscosities were determined in accordance with DIN 53019 using a rotational viscosimeter, the dropping points were determined in accordance with ASTM D3954, the ring/ball softening points were determined in accordance with ASTM D3104. The weight average molar mass M.sub.w and the number average molar mass .sub.n were determined by gel permeation chromatography at a temperature of 135° C. in 1,2-dichloro-benzene.

(4) The polyolefins 1 to 4 which were used according to the invention and are shown in Table 1 were prepared by methods of the prior art as described in EP 0 384 264 or EP 0 571 882.

(5) TABLE-US-00001 TABLE 1 Polyolefins used Polyolefin 1 Polyolefin 2 Polyolefin 3 Polyolefin 4 Preparation EP 0 384 264 EP 0 384 264 EP 0 571 882 EP 0 384 264 according to general general Ex. 3 general method method method Ex. 1-16.sup.1) Ex. 1-16.sup.2) Ex. 1-16.sup.3) Type Propylene- Propylene- Propylene Propylene- ethylene ethylene homopolymer ethylene copolymer copolymer copolymer Softening .sup.  83.sup.4) 88 .sup.  145.sup.4) 106 point (° C.) Viscosity at  180 11500  101 4300 170° C. (mPa .Math. s) M.sub.n 2760 8250 1980 5320 M.sub.w 6320 19110 3900 12030 .sup.1)Polymerization data: total ethylene usage 400 g, polymerization temp. 75° C. .sup.2)Total ethylene usage 350 g, polymerization temp. 65° C. .sup.3)Total ethylene usage 200 g, polymerization temp. 50° C. .sup.4)Dropping point

(6) The polyolefins 1 to 4 which are described in detail above were melted together with the additional components shown in Table 2 in the mixing ratios indicated and mixed at a temperature of 170° C.

(7) TABLE-US-00002 TABLE 2 Illustrative formulations and comparative formulations (reported in % by weight) and resulting initial peel values in N/mm.sup.2, measured at 37° C. Example 1 2 3 4 5 Polyolefin 1 80 Polyolefin 2 80 Polyolefin 3 5 Polyolefin 4 75 80 Affinity GA-1900 60 Escorez 5637 20 20 20 20 40 Oppanol B11 Vestoplast 828 Initial peel — 364 544 — 205 Example 6 7 8 9 10 Comparison I SIS based 100 Comparison II SIS based 100 Huntsman RT-2730 100 Polyolefin 3 70 30 Escorez 5400 40 Escorez 5637 20 Oppanol B11 10 Vestoplast 828 30 Initial peel 192 205 166 473 392

(8) To determine the peel values of the hot melt adhesives tested, nonwoven material BBA Style 717D (16.9 gsm) was adhesively bonded to a polyethylene film Clopay DH-203 PE by means of each of the hot melt adhesives as per illustrative formulations 1 to 10 at 25° C., with in each case 6.2 g/m.sup.2 of hot melt adhesive being sprayed onto the nonwoven material and the sprayed nonwoven and the film then being promptly pressed together by means of rollers. The specimens were stored for 24 hours at a temperature of 25° C. under standard conditions and then peeled at a speed of 12 inches/min and a peel angle of 180° at 25° C.

(9) The test results show, by way of the initial peel values, a sometimes very large increase in the adhesive strength of the hot melt adhesives containing the polyolefins used according to the invention, compared to hot melt adhesives of the prior art (see Examples 5, 6, 7 and 8). Consequently, a satisfactory adhesive action can be achieved even when using the hot melt adhesives of the invention in amounts of less than 6 g/m.sup.2.

(10) Chemical nature of the commercial products used:

(11) TABLE-US-00003 Affinity GA-1900 Polyethylene (Dow Chemical Corp.) Escorez 5637 Hydrocarbon resin (ExxonMobil) Escorez 5400 Hydrocarbon resin (ExxonMobil) Oppanol B11 Polyisobutene (BASF) Vestoplast 828 amorphous poly-alpha-olefin (Degussa) Huntsman RT-2730 amorphous poly-alpha-olefin (Huntsmann) Comparison I SIS based hot melt adhesive formulation comprising styrene-isoprene block copolymer, oil, resin (H B Fuller) Comparison II SIS based hot melt adhesive formulation comprising styrene-isoprene block copolymer, oil, resin (National Starch)