An apparatus for curing concrete includes a multiple layer film and an absorbent layer. The film can include pH modifying components and antiskid components. The absorbent layer can include pH modifying components. The apparatus can be applied to concrete after hydration water is applied. The apparatus can enclose concrete members during transport so as to continue the curing process during transport. The film can be used as a barrier layer between the ground and poured concrete. The apparatus can be manufactured by heating a film to its crystalline softening point, applying adhesive material to an absorbent material, and adhering the film to the absorbent material. A method of curing concrete includes pouring concrete, waiting for the concrete to reach the bleed stage, providing hydration water, adding a pH modifying component to the hydration water, and applying the hydration water with the pH modifying component to the poured concrete.

A new protective polymeric sheet is described wherein said polymeric sheet includes perforations and attached spacers that allow air and water circulation when the sheet is in use. The sheet protects underlying structures from damage while ensuring moisture migration between the protective polymeric sheet and the underlying structure. The protective polymeric sheet comprises a plurality of perforations extending through the sheet and a plurality of spacers, each spacer extending from a lower surface of the sheet adjacent to one side of each perforation. The spacers are created during perforation of the polymeric sheet. The protective polymeric sheet is useful in a number of applications, including without limitation: to protect pipelines; to replace geotextiles in heap leach processes; to line sandboxes and paving stones; to cover greenhouse floors; to make industrial or residential gutter caps; and as a filter.

A blend suitable for use in a release layer of a multilayer protective film. The blends comprise greater than 50 wt. % of an ethylene/alpha-olefin copolymer, a functionalized ethylene-based polymer, and an inorganic filler.

Separating membrane of plastic material, made up of a bossed and waterproof sheet which is coupled with a permeable base layer. The bosses are of the cylindrical type with a double diameter and have such a shape and arrangement as to feature improved adhesion on both faces. The gripping of the adhesive is increased in order to obtain greater tear strength, on the upper face, and at the same time increases the area of contact with the base layer for a greater resistance to delamination on the lower face. In particular, inside each chamber there is an internal crown, which divides it like a necking into two superimposed compartments having the same diameter, wherein the first compartment has a depth amounting to at least of the total. A production process for obtaining the membrane is also disclosed.

This invention relates to an anisotropic multilayer film and the process of making a multilayer film, wherein a supercritical blowing agent is introduced to at least one layer, wherein at least one layer comprises 10 to 100 percent by weight LLDPE with a melt index of 0.2 to 2 g/10 min. The film in this invention can have a surface with an average Sheffield smoothness, according to TAPPI T 538, of less than 100. The film in this invention can have a puncture propagation tear resistance, in accordance with ASTM D2582, greater than 500 g/mil.

Separating membrane of plastic material, made up of a bossed and waterproof sheet which is coupled with a permeable base layer. The bosses are of the cylindrical type with a double diameter and have such a shape and arrangement as to feature improved adhesion on both faces. The gripping of the adhesive is increased in order to obtain greater tear strength, on the upper face, and at the same time increases the area of contact with the base layer for a greater resistance to delamination on the lower face. In particular, inside each chamber there is an internal crown, which divides it like a necking into two superimposed compartments having the same diameter, wherein the first compartment has a depth amounting to at least of the total. A production process for obtaining the membrane is also disclosed.

An apparatus for curing concrete includes a multiple layer polyolefin film and an absorbent layer. The polyolefin film layer can include pH modifying components and antiskid components. The absorbent layer can also include pH modifying components. The absorbent layer can include nonwoven fabric. The apparatus can be applied to curing concrete after hydration water is applied to the curing concrete. The apparatus can also be used to enclose poured concrete members during transport of the members so as to continue the curing process during transport. The film can also be used as a barrier layer between the ground and poured concrete.

The present disclosure provides a multilayer film containing at least three layers, including (A) a core layer containing a high density polyethylene (HDPE) having a density from 0.940 g/cc to 0.980 g/cc; and (B) skin layers on opposite sides of the core layer. Each skin layer includes (i) a propylene homopolymer; (ii) from 2,000 to 3,500 ppm of a slip agent; and (iii) from 4,000 to 10,000 ppm of an antiblock agent.

A glass laminate includes a non-glass substrate with a first surface and a second surface opposite the first surface. A glass sheet is laminated to the first surface of the non-glass substrate. A barrier film is laminated to the second surface of the non-glass substrate and includes a first surface adjacent to the non-glass substrate, a second surface opposite the first surface. A thickness of the barrier film can be at most about 0.5 mm. The second surface of the barrier film can define an outer surface of the glass laminate. The barrier film can be a multi-layer barrier film with a metal layer and a polymer layer. An absolute value of a flatness of the glass laminate determined according to European Standard EN 438 after exposure to 23 C. and 90% relative humidity for 7 days can be at most about 3 mm/m.

A multilayer material is disclosed which consists of polyethylene foam sandwiched between two external layers of high-density polyethylene. A two-step manufacturing process for forming such a multilayer material is disclosed, which consists of (1) thermal bonding of a roll stock of PE foam with a roll stock of HDPE/LDPE laminate, followed by cutting into composites, and (2) thermal bonding of two composites to form a multilayer material.