Self-immolative polymers and compositions comprising such polymers are described. The polymers are copolymers of phthalaldehyde and one or more additional aldehydes and can degrade/decompose upon exposure to a desired stimulus, like light, heat, sound, or chemical trigger. The copolymers can be linear or cyclic, and can be crosslinked or uncrosslinked. Polymer compositions, including multilayered and multiregioned compositions, containing the copolymers are disclosed. These compositions can contain agents such as crosslinking agents, crosslinking catalysts, photocatalysts, theremocatalyts, sensitizers, chemical amplifiers, freezing point depressing agent, photo-response delaying agents, and the like. Methods of making and using the copolymers are also described.

A water-degradable welding purge dam apparatus for purging a weld zone of a pipe assembly having first and second pipes having respective first and second pipe ends to be welded together at a root gap. The purge dam apparatus includes a blocking plate assembly having an outer blocking plate, an inner blocking plate, and zero or more interior blocking plates. The blocking plate assembly may be formed from one or more water degradable materials to facilitate removal of the purge dam apparatus from the pipe assembly using an aqueous fluid following welding. At least one of the blocking plates may include a plurality of fluid flow apertures to aid distribution of the aqueous fluid through the blocking plate assembly. If desired, first and second ones of the blocking plate assembly may be ganged together by an interconnection assembly to form a ganged set of blocking plate assemblies.

A composite component for a wind turbine blade is provided. The composite component includes a stack of at least one fiber layer and a membrane which has a first surface and a second surface which is an opposite surface with respect to the first surface. The membrane is arranged with the first surface on top of the stack. The membrane is perforated with openings, wherein the membrane is formed in such a way that the openings are permeable for a fluid flowing along a first direction directing from the first surface to the second surface and impermeable for a fluid flowing along a second direction directing from the second surface to the first surface.

The invention relates to a food grade multilayer film structure (10) for manufacturing flexible containers or flexible parts of containers for dry to semi-liquid products, characterized by consisting of: a first layer (1) of a cellulose-based barrier film with a thickness between 17 and 23 m; a second layer (2) of a bio-based Poly(butylene succinate-co-butylene adipate) (PBSA) with a thickness between 80 and 85 m; and an adhesive layer (3) joining the first layer (1) and the second layer (2),
wherein the multilayer film structure (10) is a compostable according to the European standard EN 13432.

A biaxially oriented polyethylene film structure comprises at least three layers, at least one layer comprising a polyethylene composition, the polyethylene composition having a density of from 0.941 to 0.962 g/cm.sup.3; a melt index, I.sub.2 of from 0.5 to 5.0 g/10 min; and a molecular weight distribution Mw/Mn, of from 3.0 to 8.0. The biaxially oriented film has good optical properties.

Disclosed is a liquid removal drypad and liquid removal system suitable for absorbing and removing liquid produced by an individual. The drypad can include one or more perforated conduits arranged with an absorbent material. A source of reduced pressure can be connected to the one or more perforated conduits to remove liquid from the drypad. The drypad can be positioned under a patient and liquid produced by the individual can be removed by applying reduced pressure to the drypad. The drypad can be made by combining one or more conduits with an absorbent material.

Provided herein are products, methods, and kits, for use in regulating the temperature of an object. The present invention relates to thermal insulating liners for regulating the temperature of perishable goods or temperature sensitive products. The thermal insulating liners generally may be dimensioned to fit within a container. The thermal insulating liners may be quickly collapsed and reconstructed to improve stackability and diminish the amount of space required to store the thermal insulating liners prior to use.

The inventive concept relates to a laminated film and a method of laminating films, and the disclosed laminated film includes at least two films sequentially stacked and bonded to each other, wherein each of the films may be each independently a gastric film or an enteric film.

A compound material, especially a recyclable composite material which consists of at least two material layers bonded by a layer of adhesive. For easy and clean separation of the two material layers, the adhesive consists of a material that gives off and/or generates water vapor when heated to more than 100 C., thereby separating the composite into its constituents.

The present invention relates to multilayer films. In one aspect, a multilayer film comprises a first polyethylene composition having a density of at least 0.965 g/cm.sup.3 and as further described herein and a second polyethylene composition having a density of 0.924 g/cm.sup.3 to 0.936 g/cm.sup.3 and as further described herein, wherein the multilayer film comprises 40 weight percent or less of the first polyethylene composition based on the total weight of the multilayer film.