High Tensile Strength Article with Elastomeric Layer
The present invention is an article of a film or sheet or a laminate of the film or sheet with nonwoven facing layer(s). The film or sheet is a blended compound of selectively hydrogenated thermoplastic block copolymer, a tackifying resin, and polyolefin and/or polystyrene, that has superior tensile strength and a good balance of good elasticity, low stiffness and good adhesion.
1 ) An article having high tensile strength, a good balance of low stiffness and recovery/set, good adhesion compound, comprising: film, fiber, filament, plurality of filaments, foam, nonwoven web, parallel strands, or sheet of an elastomeric compound, or a laminate formed by bonding an elastomeric compound layer in the form of a film, fiber, filament, plurality of filaments, foam, nonwoven web, or parallel strands to one or more facing layers, said elastomeric compound comprising:
from about 60 to about 80 wt. % selectively hydrogenated thermoplastic block copolymer,
from about 17 to about 25 wt. % of cyclic aliphatic tackifying resin,
from about 4-13 wt. % polyolefin,
said article having a tensile strength of at least 6000 psi in the MD and/or TD direction, (using about 12% polyolefin and 20 wt. % cyclic aliphatic tackifying resin), and
a Probe Tack (ASTM D 2979) of at least 0.110 Newtons.
2 ) The article of claim 1 , wherein said selectively hydrogenated thermoplastic block copolymer is S-EB-S, S-EP-S, S-EP-S-EP, S-EB-S-EB, or S-EB/S-S.
3 ) The article of claim 1 , wherein said selectively hydrogenated thermoplastic block copolymer is (S-EB)nX, (S-EP)nX, and (S-EB/S)nX, where n is the number of wills and is 2-3 and X is a coupling agent residue.
4 ) The article of claim 1 , wherein said polyolefin is substantially polyethylene based polyolefin plastomer.
5 ) The article of claim 1 , wherein said polyolefin is substantially a polyethylene wax.
6 ) The article of claim 1 , said elastomeric compound further including antioxidant, stabilizer and HDPE partitioning agent.
7 ) The article of claim 6 , wherein the total amount of antioxidant, stabilizer and HDPE partitioning agent is less than 2 wt. % of said elastomeric compound.
8 ) The article of claim 1 , wherein said article has 100% hysteresis permanent set ≦6% in the MD and TD directions, 100% hysteresis recovered energy ≧70% in the MD and TD directions,
9 ) The article of claim 1 , wherein said article has a 400% hysteresis permanent set of ≦30% in the MD and recovered energy ≧60% in the MD.
10 ) The article of claim 1 wherein said facing layer or layers are comprised of homopolymers or copolymers of ethylene, propylene or butylene and mixtures of these, or and inelastic layer of nylon, polyester or polyurethane.
11 ) An article having high tensile strength, a good balance of low stiffness and recovery/set, good adhesion compound, comprising: film, fiber, filament, plurality of filaments, foam, nonwoven web, parallel strands, or sheet of an elastomeric compound, or a laminate formed by bonding an elastomeric compound layer in the form of a film, fiber, filament, plurality of filaments, foam, nonwoven web, or parallel strands to one or more facing layers, said elastomeric compound comprising:
from about 60 to about 80 wt. % selectively hydrogenated thermoplastic block copolymer,
from about 17 to about 25 wt. % of cyclic aliphatic tackifying resin,
from about 4-13 wt. % polyolefin,
from about 5-15 wt. % polystyrene,
said article having a tensile strength of at least 6000 psi in the MD and/or TD direction, (using about 4 wt. % polyolefin, 10 wt. % polystyrene, and 18 wt. % cyclic aliphatic tackifying resin).
12 ) The article of claim 11 , wherein said selectively hydrogenated thermoplastic block copolymer is S-EB-S, S-EP-S, S-EP-S-EP, S-EB-S-EB, or S-EB/S-S.
13 ) The article of claim 11 , wherein said selectively hydrogenated thermoplastic block copolymer is (S-EB)nX, (S-EP)nX, and (S-EB/S)nX, where n is the number of arms and is 2-3 and X is a coupling agent residue.
14 ) The article of claim 11 , wherein said compound has a Probe Tack (ASTM D 2979) of at least 0.110 Newtons.
15 ) The article of claim 11 , wherein said facing layer or layers are comprising homopolymers or copolymers of ethylene, propylene or butylene and mixtures of these, or and inelastic layer of nylon, polyester or polyurethane.
16 ) An article having high tensile strength and good adhesion compound, comprising: film, fiber, filament, plurality of filaments, foam, nonwoven web, parallel strands, or sheet of an elastomeric compound, or a laminate formed by bonding an elastomeric compound layer in the form of a film, fiber, filament, plurality of filaments, foam, nonwoven web, or parallel strands to one or more facing layers, said elastomeric compound comprising:
styrene block copolymer,
cyclic aliphatic tackifying resin,
polyolefin,
said article having a tensile strength of at least 6000 psi in the MD and/or TD direction, (using about 12 wt. % polyolefin and 20 wt. % cyclic aliphatic tackifying resin), and
a Probe Tack (ASTM D 2979) of at least 0.110 Newtons, and a 400% hysteresis permanent set of ≦30% in the MD and recovered energy ≧60% in the MD, and a stress relaxation of ≦32% after 4 hours, 100° F. at 50% elongation.
17 ) The article of claim 16 , wherein said elastomeric compound has a 300% modulus of ≦450 psi in the MD and TD.
18 ) The article of claim 16 , wherein said selectively hydrogenated thermoplastic block copolymer is S-EB-S, S-EP-S, S-EP-S-EP, or S-EB/S-S.
19 ) The article of claim 16 , wherein said selectively hydrogenated thermoplastic block copolymer is (S-EB)nX, (S-EP)nX, and (S-EB/S)nX, where n is the number of arms and is 2-3 and X is a coupling agent residue.
20 ) The article of claim 16 , wherein said polyolefin comprises 7 to 13 wt. % of said elastomeric compound.
21 ) The article of claim 16 , wherein said elastomeric compound comprises 2 to 7 wt. % polyolefin and 5 to 15 wt. % polystyrene.
22 ) The article of claim 16 , wherein said facing layer is an elastic layer of homopolymers or copolymers of ethylene, propylene or butylene and mixtures of these, or and inelastic layer of nylon, polyester or polyurethane.