This invention relates to a wind turbine blade with retrofitted coating in and around areas where the blade is especially exposed to erosion damages, which is established by the coating including a glue layer, a fiber reinforced polymer layer and one or more non-reinforced polymer layers over the fiber reinforced layer, since the polymer layers stretch themselves out over the fiber reinforced layer and includes areas of the wind turbine blade's surface, which are less exposed to erosion damages. A method for creation of such a wind turbine blade and creation of such a coating and the coating itself, is also established with the invention.

This invention relates to a wind turbine blade with retrofitted coating in and around areas where the blade is especially exposed to erosion damages, which is established by the coating including a glue layer, a fiber reinforced polymer layer and one or more non-reinforced polymer layers over the fiber reinforced layer, since the polymer layers stretch themselves out over the fiber reinforced layer and includes areas of the wind turbine blade's surface, which are less exposed to erosion damages. A method for creation of such a wind turbine blade and creation of such a coating and the coating itself, is also established with the invention.

A fabric and elastomeric material (referred to as a fabric trilayer) combined with a sealant may be applied in such a fashion so as to eliminate or minimize air entrapment in an elastomeric composite structure that forms a seal-sealing volume. The performance of the self-sealing volume is dramatically improved with this minimizing of air entrapment. Surprisingly and unexpectedly, this construction approach may be accomplished without significantly adding to the weight or thickness of the volume and without affecting the outer dimension of the self-sealing volume. Thus, a method and system for forming a self-sealing volume are described. The system includes an elastomeric composite structure comprising at least one layer of an elastomeric material derived from a neat (no solvent) elastomeric material that does not substantially react at room temperature.

A transdermal drug delivery patch includes a flexible base layer, and a plurality of microneedles disposed at one surface of the base layer and including a biodegradable polymer and a drug. Each of a plurality of microneedles is formed as a star-shaped pyramid including a plurality of protrusions extending in a radial direction, and a concave shape is formed between two protrusions adjacent along a circumferential direction among a plurality of protrusions.

An improved liner for a container in which gases, liquids, or powders are stored. The liner is a multi-layer structure made in a roto molding machine. The liner includes a first outer layer made of metallocene polyethylene, an intermediate gas and liquid impermeable layer, and one or more inner layers made of thermoplastic material compatible with the material stored inside the container. During the molding process, the three layers are made sequentially with the second and third layers being bonded and fused to the adjacent layer to form a uniform composite layer. The outer layer is made of metallocene polyethylene with superior rigidity and relatively low coefficient of thermal expansion making the liner less susceptible to cracking and useful as a layup structure for molding a structure around it. The liner is then used as a layup structure for outer fibers and infused resin.

An improved liner for a container in which gases, liquids, or powders are stored. The liner is a multi-layer structure made in a roto molding machine. The liner includes a first outer layer made of metallocene polyethylene, an intermediate gas and liquid impermeable layer, and one or more inner layers made of thermoplastic material compatible with the material stored inside the container. During the molding process, the three layers are made sequentially with the second and third layers being bonded and fused to the adjacent layer to form a uniform composite layer. The outer layer is made of metallocene polyethylene with superior rigidity and relatively low coefficient of thermal expansion making the liner less susceptible to cracking and useful as a layup structure for molding a structure around it. The liner is then used as a layup structure for outer fibers and infused resin.

The present disclosure may be embodied as a method for creating a restriction pattern from a mask material having a strain (ε.sub.mask) an for mapping elastomeric membrane having a strain (ε.sub.membrane) into a target 3D shape. The method may include discretizing the target 3D shape into a plurality of radial segments, and a radial strain (ε.sub.r) is determined for each radial position (r) on each radial segment of the plurality of radial segments. A restriction pattern is determined, wherein the restriction pattern comprises a quantity of mask material for each position r to provide a composite strain (ε.sub.mask, ε.sub.silicone). In some embodiments, the method further includes depositing a first membrane layer into a mold and placing mask material into the first membrane layer according to the determined restriction pattern. The first membrane layer is cured.

The present disclosure may be embodied as a method for creating a restriction pattern from a mask material having a strain (ε.sub.mask) an for mapping elastomeric membrane having a strain (ε.sub.membrane) into a target 3D shape. The method may include discretizing the target 3D shape into a plurality of radial segments, and a radial strain (ε.sub.r) is determined for each radial position (r) on each radial segment of the plurality of radial segments. A restriction pattern is determined, wherein the restriction pattern comprises a quantity of mask material for each position r to provide a composite strain (ε.sub.mask, ε.sub.silicone). In some embodiments, the method further includes depositing a first membrane layer into a mold and placing mask material into the first membrane layer according to the determined restriction pattern. The first membrane layer is cured.

A plug assembly for use in a process for manufacturing an insulated register box has a body having a bottom and at least one side wall extending upwardly from the bottom, a rotatable element at the bottom of the body, and an actuator connected to the rotatable element and positioned above the rotatable element. The rotatable element is adapted to seal an end of a duct in an interior of the box of the insulated register box. The rotatable element is movable between an installation position and a sealing position. The actuator is cooperative with the rotatable element so as to move the rotatable element between the installation position and the sealing position.

A plug assembly for use in a process for manufacturing an insulated register box has a body having a bottom and at least one side wall extending upwardly from the bottom, a rotatable element at the bottom of the body, and an actuator connected to the rotatable element and positioned above the rotatable element. The rotatable element is adapted to seal an end of a duct in an interior of the box of the insulated register box. The rotatable element is movable between an installation position and a sealing position. The actuator is cooperative with the rotatable element so as to move the rotatable element between the installation position and the sealing position.