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.

In a preferred embodiment, a composite panel with a smooth outer surface, ready for painting with or without addition of primer, may be created by constructing a panel layup assembly upon a mold, the panel layup assembly including a composite panel having a core and a resin formulation, and a release film between the mold and the composite panel, where a smooth release surface of the release film is in contact with the composite panel upon construction; initiating curing of the composite panel at a first temperature within a lowermost ten percent of a curing temperature range of the resin formulation; continuing curing of the composite panel at a second temperature above the lowermost ten percent of the curing temperature range; and completing curing of the composite panel at a third temperature below the second temperature.

A multilayer, heat-shrinkable film has a first portion containing an outer heat seal layer and a second portion containing a PVDC barrier layer and a second outer layer comprising polyester. Both film portions comprise polymer networks which are strained by solid-state orientation, but only the first portion contains a crosslinked polymer network. The film has (i) a total free shrink at 85° C. of at least 90% and (ii) an instrumented impact energy-to-break of at least 0.0.65 J/mil and/or an instrumented impact peak load of at least 70 N/mil. The film is primarily made from ethylene-based polymers. Packaging articles can be made by sealing the film to itself. The film comprises no polyamide or polyamide in an amount up to 10 wt %, on a total film weight basis.

The present invention relates to a spar cap for a wind turbine blade comprising a plurality of pre-cured fibre-reinforced elements and a plurality of interlayers. The plurality of pre-cured fibre-reinforced elements include a first pre-cured fibre-reinforced element and a second pre-cured fibre-reinforced element and the plurality of interlayers include a first interlayer comprising a first plurality of fibres embedded in a first cured resin. The first interlayer is being arranged between the first pre-cured fibre-reinforced element and the second pre-cured fibre-reinforced element. The first plurality of fibres have a first elastic modulus, the first cured resin has a second elastic modulus, the first and/or second pre-cured fibre-reinforced elements have a third elastic modulus, and the first interlayer has a fourth elastic modulus. The ratio between the first elastic modulus and the second elastic modulus is between 1:4 and 4:1 and/or the ratio between the third elastic modulus and the fourth elastic modulus is between 1:4 and 4:1.

In a preferred embodiment, a composite panel with a smooth outer surface, ready for painting with or without addition of primer, may be created by constructing a panel layup assembly upon a mold, the panel layup assembly including a composite panel having a core and a resin formulation, and a release film between the mold and the composite panel, where a smooth release surface of the release film is in contact with the composite panel upon construction; initiating curing of the composite panel at a first temperature within a lowermost ten percent of a curing temperature range of the resin formulation; continuing curing of the composite panel at a second temperature above the lowermost ten percent of the curing temperature range; and completing curing of the composite panel at a third temperature below the second temperature.

In a preferred embodiment, a composite panel with a smooth outer surface, ready for painting with or without addition of primer, may be created by constructing a panel layup assembly upon a mold, the panel layup assembly including a composite panel having a core and a resin formulation, and a release film between the mold and the composite panel, where a smooth release surface of the release film is in contact with the composite panel upon construction; initiating curing of the composite panel at a first temperature within a lowermost ten percent of a curing temperature range of the resin formulation; continuing curing of the composite panel at a second temperature above the lowermost ten percent of the curing temperature range; and completing curing of the composite panel at a third temperature below the second temperature.

A fiber preform includes a substrate. A fiber bundle includes reinforcing fibers arranged on the substrate in a shape of a shoe sole and attached to the substrate by a plurality of stitches of the thermoplastic thread to form a first preform layer having a principal orientation. An orthotropic composite material shoe sole is also provided that includes the fiber preform with a cured molded resin surrounding the fiber preform, the cured molded resin having a shape of the shoe sole. A method of forming a fiber preform for use in a composite material shoe sole is also provided.

A multilayer, heat-shrinkable film has a first portion containing an outer heat seal layer and a second portion containing a PVDC barrier layer and a second outer layer comprising polyester. Both film portions comprise polymer networks which are strained by solid-state orientation, but only the first portion contains a crosslinked polymer network. The film has (i) a total free shrink at 85° C. of at least 90% and (ii) an instrumented impact energy-to-break of at least 0.0.65 J/mil and/or an instrumented impact peak load of at least 70 N/mil. The film is primarily made from ethylene-based polymers. Packaging articles can be made by sealing the film to itself. The film comprises no polyamide or polyamide in an amount up to 10 wt %, on a total film weight basis.

A film for laminating glass includes a polyvinyl acetal, a plasticizer, inorganic particles, and a trioxane-based compound.

Polymeric multilayer film having first and second opposed major surfaces, comprising at least one layer comprising a first release agent and exhibiting a random network of strands and connective regions. The polymeric multilayer films are useful, for example, for tape and graphic articles.