The present disclosure discloses a low-water-vapor-permeability polyolefin-elastomer film and its preparation method. The film comprises: 50-100 mass parts of a matrix resin, 0-40 mass parts of a modified resin, 0.001-2 mass parts of an activator, 0.1-3 mass parts of an organic peroxide, 0.02-5 mass parts of an assistant cross-linker, 0.02-2 mass parts of a silane coupling agent, 0.005-2 mass parts of a light stabilizer, and 0-20 mass parts of a water blocking filler. In the present disclosure, by adding the modified resin and the activator that have an active group, a cross-linking degree and a cross-linking density of the film are improved, and a water-vapor permeability is reduced; by adding the water blocking filler, the water blocking property of the film is further improved, thereby ensuring reliability of the assembly, and prolonging service life of the assembly.

The present disclosure discloses a low-water-vapor-permeability polyolefin-elastomer film and its preparation method. The film comprises: 50-100 mass parts of a matrix resin, 0-40 mass parts of a modified resin, 0.001-2 mass parts of an activator, 0.1-3 mass parts of an organic peroxide, 0.02-5 mass parts of an assistant cross-linker, 0.02-2 mass parts of a silane coupling agent, 0.005-2 mass parts of a light stabilizer, and 0-20 mass parts of a water blocking filler. In the present disclosure, by adding the modified resin and the activator that have an active group, a cross-linking degree and a cross-linking density of the film are improved, and a water-vapor permeability is reduced; by adding the water blocking filler, the water blocking property of the film is further improved, thereby ensuring reliability of the assembly, and prolonging service life of the assembly.

A selectively hydrogenated block copolymer of general formula S-E-S, (S-E.sub.1).sub.nX, or mixtures thereof is disclosed, where n has a value of 2-6, and X is a coupling agent residue. Before hydrogenation, S is a polystyrene block having a molecular weight of 4,400-5,600 g/mol, and E and E1 are polydiene blocks having molecular weights of 18,000-36,000 g/mol and 9,000 to 18,000 g/mol, respectively, selected from polybutadiene, polyisoprene and mixtures thereof, and having a total vinyl content of 60-85 mol %. After hydrogenation, the block copolymer has 0-10 percent of styrene double bonds reduced and at least 80 percent of conjugated diene double bonds reduced. The block copolymer has a solution viscosity of less than 80 centipoise (cP); a polystyrene content of 25-40 wt. % and up to 50 wt. % of diblock units of general formula S-E or S-E.sub.1.

A selectively hydrogenated block copolymer of general formula S-E-S, (S-E.sub.1).sub.nX, or mixtures thereof is disclosed, where n has a value of 2-6, and X is a coupling agent residue. Before hydrogenation, S is a polystyrene block having a molecular weight of 4,400-5,600 g/mol, and E and E1 are polydiene blocks having molecular weights of 18,000-36,000 g/mol and 9,000 to 18,000 g/mol, respectively, selected from polybutadiene, polyisoprene and mixtures thereof, and having a total vinyl content of 60-85 mol %. After hydrogenation, the block copolymer has 0-10 percent of styrene double bonds reduced and at least 80 percent of conjugated diene double bonds reduced. The block copolymer has a solution viscosity of less than 80 centipoise (cP); a polystyrene content of 25-40 wt. % and up to 50 wt. % of diblock units of general formula S-E or S-E.sub.1.

The present invention relates to a hot melt adhesive composition comprising at least one particular aldehyde scavenger, and the use of said aldehyde scavenger(s) to remove or reduce the volatile organic compound(s) (VOC), particularly volatile aldehyde(s) of a hot melt adhesive composition. The hot melt adhesive compositions according to the invention emit low odor during and after their manufacture and application, and are thus particularly useful to manufacture low odor disposable nonwoven absorbent articles.

The present invention relates to a hot melt adhesive composition comprising at least one particular aldehyde scavenger, and the use of said aldehyde scavenger(s) to remove or reduce the volatile organic compound(s) (VOC), particularly volatile aldehyde(s) of a hot melt adhesive composition. The hot melt adhesive compositions according to the invention emit low odor during and after their manufacture and application, and are thus particularly useful to manufacture low odor disposable nonwoven absorbent articles.

The present invention relates to a hot melt adhesive composition comprising at least one particular aldehyde scavenger, and the use of said aldehyde scavenger(s) to remove or reduce the volatile organic compound(s) (VOC), particularly volatile aldehyde(s) of a hot melt adhesive composition. The hot melt adhesive compositions according to the invention emit low odor during and after their manufacture and application, and are thus particularly useful to manufacture low odor disposable nonwoven absorbent articles.

Pressure-sensitive adhesives, adhesive tapes, and methods enable high bond strengths on non-polar or rough substrates. The pressure-sensitive adhesives and methods comprise (a) at least one poly(meth)acrylate, (b) at least one resin A selected from colophony resins and terpene-phenolic resins, (c) at least one hydrocarbon resin B1 having a softening point of greater than 50 C., and (d) at least one hydrocarbon resin B2 having a softening point of less than or equal to 25 C. The adhesive tapes comprise one or more layers of the pressure-sensitive adhesives, and the methods may produce adhesive bonds on substrates with low surface energy and/or on substrates with a mean roughness of at least 5 m.

Pressure-sensitive adhesives, adhesive tapes, and methods enable high bond strengths on non-polar or rough substrates. The pressure-sensitive adhesives and methods comprise (a) at least one poly(meth)acrylate, (b) at least one resin A selected from colophony resins and terpene-phenolic resins, (c) at least one hydrocarbon resin B1 having a softening point of greater than 50 C., and (d) at least one hydrocarbon resin B2 having a softening point of less than or equal to 25 C. The adhesive tapes comprise one or more layers of the pressure-sensitive adhesives, and the methods may produce adhesive bonds on substrates with low surface energy and/or on substrates with a mean roughness of at least 5 m.

The objective of the present invention is to provide a thermoplastic adhesive film capable of, in a thermobonding step of a laminated body of different materials used particularly in automobile members, electronic members, construction members, etc., such as a polypropylene resin material, a polyamide resin material, and a metal material such as aluminum or steel plates, preventing deformation of the resin material and peeling due to thermal history after molding. Provided as a solution is a thermoplastic adhesive film comprising a resin composition (D) which contains a thermoplastic olefin elastomer resin (A), an acid-modified polypropylene resin (B) and a nucleating agent (C).