A method for producing a polyolefin-based porous film includes an (A) step: a raw fabric forming step for forming a non-porous raw fabric from a polyolefin-based resin composition, a (B) step: an MD cold stretching step for cold stretching the non-porous raw fabric obtained in the (A) step at a temperature of 20 C. to (Tm30) C. (Tm is a melting point ( C.) of the non-porous raw fabric) in an extruding direction (MD) of the raw fabric to make the raw fabric porous; a (D) step: a TD cold stretching step for cold stretching a film processed in the (B) step in a direction (TD) perpendicular to the MD, and an (H) step: a thermal fixing step, in the above order. A thermal fixing temperature T.sub.2 ( C.) in the (H) step satisfies expressions (1) and (2) below; T.sub.2>T.sub.1 (1), (Tm3)T.sub.2(Tm40) (2) (in the expressions, T.sub.1 represents a stretching temperature ( C.) in the (D) step, and Tm represents the melting point ( C.) of the non-porous raw fabric). A polyolefin-based porous film made of a polyolefin-based resin composition has a pore surface area of 35.0 to 42.0 m.sup.2/g and birefringence of 2.010.sup.2 to 4.010.sup.2.

Disclosed herein are, for instance, coated substrates comprising cellulose-based substrates with surface-treated aqueous-based polymer coatings. In some embodiments, the aqueous-based polymer coatings are surface-treated using corona treatment. Methods of making and using the same are also disclosed.

A gas barrier laminate which includes a base material layer, and a gas barrier polymer layer having a thickness of from 0.01 m to 0.45 m provided over at least one surface of the base material layer and formed by heating a mixture including a polycarboxylic acid and a polyamine compound.

A gas-barrier laminate (10) of a structure in which a first inorganic barrier layer (3), a water-trapping layer (5) and a second inorganic barrier layer (9) are provided in this order on a plastic base material (1), wherein the water-trapping layer (5) is a layer in which a granular moisture-absorbing agent is dispersed in a matrix of an ionic polymer, the granular moisture-absorbing agent being capable of absorbing moisture to a degree lower than that attained by the matrix, and an organic layer (7) is provided between the water-trapping layer (5) and the second inorganic barrier layer (9), the organic layer (7) serving as an underlying layer for forming the second inorganic barrier layer. The water-trapping layer has excellent barrier property against water and is, at the same time, effectively suppressed from swelling despite it has absorbed moisture. The water-trapping layer is, further, effectively suppressed from losing its activity.

A film for use in a packaging structure, comprising a coating on the film surface which comprises a binder and a particulate protuberant component able to remove a volatile organic compound from an environment in contact with the film in the packaging structure. Also provided is a packaging structure comprising such a film and a package which comprises the packaging structure.

A method for producing a polyolefin-based porous film includes an (A) step: a raw fabric forming step for forming a non-porous raw fabric from a polyolefin-based resin composition, a (B) step: an MD cold stretching step for cold stretching the non-porous raw fabric obtained in the (A) step at a temperature of 20 C. to (Tm30) C. (Tm is a melting point ( C.) of the non-porous raw fabric) in an extruding direction (MD) of the raw fabric to make the raw fabric porous; a (D) step: a TD cold stretching step for cold stretching a film processed in the (B) step in a direction (TD) perpendicular to the MD, and an (H) step: a thermal fixing step, in the above order.

There is provided a method for the production of a packaging material comprising a substrate and a gas barrier layer based on polyvinyl alcohol (PVOH), said method comprising the steps of applying a coating composition of said PVOH dissolved in a first solvent onto said substrate to form a coating subjecting the coating to a first drying step to form a dried PVOH-based coating on said substrate, contacting the dried PVOH-based coating with a crosslinking solution comprising a crosslinking agent in a second solvent, to effect crosslinking of the PVOH-based coating, and subsequent to the contact with the crosslinking solution, subjecting the PVOH-based coating to a second drying step, forming the PVOH-based barrier layer on said substrate, with the proviso that if the crosslinking solution comprises PVOH, the amount of PVOH added by the crosslinking solution is less than 20% (by weight), such as less than 10% (by weight), of the amount of PVOH added by the coating composition.

This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (EHA), -carboxyethyl acrylate (-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (-EM), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.

Method of making a golf ball, the golf ball comprising a core, an outer layer and at least one adhesion promoting coating disposed between each of the core and the outer layer; the core comprising a rubber composition comprising at least one zinc-containing and/or magnesium-containing component; the outer layer comprising at least one ionomer; and the adhesion promoting coating comprising a waterborne dispersion comprised of at least one ethylene acid copolymer having an acid content of at least 15% by weight wherein the copolymer is at least partially neutralized with one or more neutralizing agent; wherein at least one neutralizing agent is selected from ammonia compounds and/or amine compounds. In a specific embodiment, the at least one neutralizing agent comprises i) mono and/or divalent metal compounds and ii) ammonia compounds and/or amine compounds.

A material includes a base resin; a solvent; and a foaming agent and a photosensitizer, and/or a substance that serves as a foaming agent and a photosensitizer.