A multi-layer exercise mat including a first layer including an outer surface and an opposing inner surface, the opposing inner surface of the first layer including a first array of three-dimensional features integral with the first layer; and a second layer including an outer surface and an opposing inner surface, the opposing inner surface of the second layer including a second array of three-dimensional features integral with the second layer. The first and second arrays of three-dimensional features are configured to grip each other to removably secure the inner surface of the first layer to the inner surface of the second layer.

Convoluted foam layers for mattresses, cushions and the like include at least one convoluted surface including at least one convolution that is structurally heterogeneous. The convoluted foam layer is formed of at least two foam layers fixedly attached to one another, wherein the foam layers are of different materials and/or have different properties. Also disclosed are processes for forming the convoluted foam layer and convoluted foam layers having multiple zones of a convoluted surface pattern that includes at least one convolution that is structurally heterogeneous.

A multilayer protective tape for rotor blades of wind energy turbines is provided herein. The protective tape comprising a protective top layer comprising a polymer film, and an adhesive bottom layer. The top layer having a continuous surface (S) that is outwardly curved or outwardly trapezoidal such that the tape has a cross-sectional profile having an inner section between first and second edge lateral sections. The inner section comprises up to 30% of the width of the tape and has a thickness (Ti), while the first and second edge lateral sections have a thickness of T1 and T2, respectively, wherein Ti greater than each of T1 or T2, and the thickness (T1 or T2) of at least one edged lateral section is at most 600 μm and the thickness of the inner section (Ti) is at least 330 μm.

Also provided is a method for applying the tape to rotor blades and a rotor blade protected by said protective tape.

A multilayer protective tape for rotor blades of wind energy turbines is provided herein. The protective tape comprising a protective top layer comprising a polymer film, and an adhesive bottom layer. The top layer having a continuous surface (S) that is outwardly curved or outwardly trapezoidal such that the tape has a cross-sectional profile having an inner section between first and second edge lateral sections. The inner section comprises up to 30% of the width of the tape and has a thickness (Ti), while the first and second edge lateral sections have a thickness of T1 and T2, respectively, wherein Ti greater than each of T1 or T2, and the thickness (T1 or T2) of at least one edged lateral section is at most 600 μm and the thickness of the inner section (Ti) is at least 330 μm. Also provided is a method for applying the tape to rotor blades and a rotor blade protected by said protective tape.

The invention provides novel aerated composite materials that possess excellent physical and performance characteristics of aerated concretes, and methods of production and uses thereof. These composite materials can be readily produced from widely available, low cost raw materials by a process suitable for large-scale production with improved energy consumption, desirable carbon footprint and minimal environmental impact.

Aspects herein relate to apparel items and apparel systems that utilize applied or printed foam nodes to provide, among other things, stand-off between an apparel item and a wearer's skin surface. One or more of the foam nodes, or areas of the textile surrounding the foam nodes, may be perforated to provide a fluid communication path between an inner-facing surface and an outer-facing surface of the apparel item. The communication path may be used to facilitate air exchange between the external environment and the wearer's body and/or to provide an exit path for moisture vapor generated by the wearer.

A foam structural material includes a first core material and a reinforcing material. The first core material has a first portion of a linear groove part formed along an edge of the first core material. The reinforcing material has a first side fitted to the first portion of the linear groove part. The first portion of the linear groove part includes a first engagement plane. The first engagement plane is engaged with the reinforcing material and has one or a plurality of projections formed thereon.

A multi-layer exercise mat including a first layer including an outer surface and an opposing inner surface, the opposing inner surface of the first layer including a first array of three-dimensional features integral with the first layer; and a second layer including an outer surface and an opposing inner surface, the opposing inner surface of the second layer including a second array of three-dimensional features integral with the second layer. The first and second arrays of three-dimensional features are configured to grip each other to removably secure the inner surface of the first layer to the inner surface of the second layer.

Disclosed is a building board construction with increased surface strength. More specifically, increased nail pull strength is achieved via the application of an external surface coating. The surface coating is ideally applied to a paper faced gypsum building board. In one possible embodiment, the coating is formed from a water soluble polymer.

An article having an embossed seal includes at least two webs, and an embossed seal joining a portion of the at least two webs, the seal including co-registered concentric discrete extended elements formed in the at least two webs, the discrete extended elements having open proximal ends.