A composite product substantially reduced the impact force imposed by hard impactor which travelled at the speed in the range of 400 m/s to 1400 m/s simultaneously damping the vibrations and shocks appeared therein is disclosed. At the same time it is light weight with the weight lower than that of 22 to 38 kg/m2and is flexible to adopt the shape suitable for the end applications. A method of manufacturing the composite product of the invention is also disclosed.

The present protective barrier is similar to those commonly installed beneath ceilings during construction work being performed on ceilings or roofs of buildings, wherein two or more sections are sewn together to construct the protective barrier. However, the present protective barrier also comprises a dustcover, which covers the seam entirely preventing dust from passing through holes created when the seam is sewn using a thread or similar means.

The present protective barrier is similar to those commonly installed beneath ceilings during construction work being performed on ceilings or roofs of buildings, wherein two or more sections are sewn together to construct the protective barrier. However, the present protective barrier also comprises a dustcover, which covers the seam entirely preventing dust from passing through holes created when the seam is sewn using a thread or similar means.

A respiratory apparatus may employ ultrasonic welds. The ultrasonic welding may be used to join a variety of headgear, mask and accessory components. This process may enhance comfort, fit and/or performance of the joined components and/or overall mask assembly. A component may be a single layer component such as a textile or fabric, or a composite or multiple layer component such as fabric and foam composites, or outer fabric layers and inner spacer fabrics. Further, a component may be a strap, some other headgear component, a mask component, an accessory component or the like.

Provided are a multilayered-coating system and a method of manufacturing the same. The multi-layered coating system includes: a layer 1 including a plurality of spherical voids with a radius a.sub.1 that are randomly distributed and separated from one another and a filler material with a refractive index n.sub.1 that is disposed in a space between the spherical voids; and subsequent layers expressed as the following word-equation, “a layer i located above a layer i−1 and including a plurality of spherical voids with a radius a.sub.i that are randomly distributed and separated from one another, and a filler material with a refractive index n.sub.i, the filler material disposed in a space between the spherical voids where i is an integer greater than 1”.

Provided are a multilayered-coating system and a method of manufacturing the same. The multi-layered coating system includes: a layer 1 including a plurality of spherical voids with a radius a.sub.1 that are randomly distributed and separated from one another and a filler material with a refractive index n.sub.1 that is disposed in a space between the spherical voids; and subsequent layers expressed as the following word-equation, “a layer i located above a layer i−1 and including a plurality of spherical voids with a radius a.sub.i that are randomly distributed and separated from one another, and a filler material with a refractive index n.sub.i, the filler material disposed in a space between the spherical voids where i is an integer greater than 1”.

Proposed is lower rollers of a hot air welder, and more particularly, to a lower roller structure of a hot air welder, which includes a first lower roller unit installed on a worktable to be pivoted vertically and a second lower roller unit installed on a main body to be slidably moved in front and rear, such that a welding operation of flat fabric and a welding operation of a cylindrical shape can be performed in a single hot air welder through alternate use of the first and second lower roller units.

A method for manufacturing a striking plate of a golf club head includes the steps of: a sewing step, in which at least one roving material is sewn onto a base material so as to form a laminate blank with an uneven thickness in a normal direction of the base material; and a forming step, in which the laminate blank is placed in a mold cavity of a mold and is formed into the striking plate with an uneven thickness.

A method for manufacturing a striking plate of a golf club head includes the steps of: a sewing step, in which at least one roving material is sewn onto a base material so as to form a laminate blank with an uneven thickness in a normal direction of the base material; and a forming step, in which the laminate blank is placed in a mold cavity of a mold and is formed into the striking plate with an uneven thickness.

An insulated cooler comprises a body and a lid at least partially connected to the body, where each is comprised of soft thermoplastic material. The body includes a base comprising rigid plastic connected to the body via a first thermoplastic sealing strip heat welded to the bottom edges of the body, and sewn to top edges of the base. The lid includes a top comprising rigid plastic connected to top edges of the lid via a second thermoplastic sealing strip heat welded to the top edges of the lid, and sewn to bottom edges of the top. The cooler also includes a waterproof liner disposed along inner surfaces of the body and the lid, insulation disposed between the liner and the body and lid, and a zipper closing the lid to the body. A method of manufacturing an insulated cooler is also disclosed. This is helpful for transporting cooler conveniently and increasing the capabilities of the cooler.