Abstract: A waterborne polyurethane dispersion is provided. The waterborne polyurethane dispersion is prepared by using a tri-functionality polyether polyol as part of the polyols for forming the prepolymer and a hydrophilic amino siloxane co-chain extender, and can exhibit superior performance properties such as enhanced color fastness, improved low temperature stability, good anti-stickiness, bally flex resistance, anti-abrasion and mechanical properties. A laminated synthetic leather article prepared with said waterborne polyurethane dispersion as well the method for preparing the synthetic leather article are also provided.

Abstract: Provided is a composite ballistic-resistant unit material, formed of an intersecting composite of N two layer structured units, 1?N?8, an organic thin film being attached to two sides thereof, the angle of intersection of each adjacent layer being 45°-90°; a first layer is a ballistic-resistant fibre unidirectional tape covered in a first resin adhesive, a second layer is a ballistic-resistant fibre unidirectional tape covered in a second resin adhesive, the tensile modulus of the first resin adhesive being lower than 6 MPa, and the tensile modulus of the second resin adhesive being higher than 6 MPa; the loss modulus of the first resin adhesive and the second resin adhesive, under the same conditions as the test frequency and strain value, at 30-40° C. is the same as the loss modulus of the ballistic-resistant fibre. When the strain sensitive rate of the ballistic-resistant fibre is at 2.4×103 s?1, the dynamic tensile stress is at least 2.4 GPa, and the sound-wave conduction speed is at least 10000 m/s.

Abstract: Provided is a composite ballistic-resistant unit material, formed of an intersecting composite of N two layer structured units, 1?N?8, an organic thin film being attached to two sides thereof, the angle of intersection of each adjacent layer being 45°-90°; a first layer is a ballistic-resistant fibre unidirectional tape covered in a first resin adhesive, a second layer is a ballistic-resistant fibre unidirectional tape covered in a second resin adhesive, the tensile modulus of the first resin adhesive being lower than 6 MPa, and the tensile modulus of the second resin adhesive being higher than 6 MPa; the loss modulus of the first resin adhesive and the second resin adhesive, under the same conditions as the test frequency and strain value, at 30-40° C. is the same as the loss modulus of the ballistic-resistant fibre. When the strain sensitive rate of the ballistic-resistant fibre is at 2.4×103 s?1, the dynamic tensile stress is at least 2.4 GPa, and the sound-wave conduction speed is at least 10000 m/s.

Abstract: A fiber optic device for enabling soldering is described. The fiber optic device includes an entry portion comprising an optical fiber bundle for receiving a single light beam wherein the optical fiber bundle splits the light beam into a plurality of separate portions, each of the separate portions for enabling soldering. The fiber optic device further includes an exit portion for emitting each of the plurality of separate portions of the light beam in a pattern to enable soldering at a plurality of locations simultaneously utilizing the single light beam.

Abstract: A press tool and method for attaching a seal to a surface are described. The seal attach press tool comprises a contact member having a curved contact surface, e.g., an arced surface. In a process of attaching a seal over an opening on a surface, the curved contact surface of the contact member is rolled over and in contact with the surface of the seal, thereby facilitating bonding the seal to the surface. According to an embodiment, the curved contact surface of the contact member comprises an elastomer and/or is covered with an elastomer pad.

Abstract: A method for determining motor spin direction of a hard disk drive is provided. The method includes forming an air inlet on a first sidewall of a disk drive base. The method further includes forming an air outlet on a second sidewall of the disk drive base wherein the air outlet comprises an airflow indicator coupled to the air outlet for indicating whether air is moving in or out of the air outlet. The method further includes rotating a disk drive motor inside the disk drive and determining the motor spin direction of the disk drive motor based on whether the air is moving in or out of the air outlet.

Abstract: A press tool and method for attaching a seal to a surface are described. The seal attach press tool comprises a contact member having a curved contact surface, e.g., an arced surface. In a process of attaching a seal over an opening on a surface, the curved contact surface of the contact member is rolled over and in contact with the surface of the seal, thereby facilitating bonding the seal to the surface. According to an embodiment, the curved contact surface of the contact member comprises an elastomer and/or is covered with an elastomer pad.

Abstract: A bar-code-reading tool. A first mirror is disposed to receive light emitted by a bar-code reader. A second mirror is disposed to receive light reflected from a bar-code label affixed to an object. The first mirror and the second mirror are arranged in a folded optical path that is disposed for the bar-code reader to read the bar-code label. A fixture holds the object comprising the bar-code label on a planar base of the fixture and disposes the bar-code label in the folded optical path. The fixture is arranged so that the object is disposed above the planar base, and the bar-code reader is disposed below the planar base.

Abstract: A fiber optic device for enabling soldering is described. The fiber optic device includes an entry portion comprising an optical fiber bundle for receiving a single light beam wherein the optical fiber bundle splits the light beam into a plurality of separate portions, each of the separate portions for enabling soldering. The fiber optic device further includes an exit portion for emitting each of the plurality of separate portions of the light beam in a pattern to enable soldering at a plurality of locations simultaneously utilizing the single light beam.

Abstract: A method for determining motor spin direction of a hard disk drive is provided. The method includes forming an air inlet on a first sidewall of a disk drive base. The method further includes forming an air outlet on a second sidewall of the disk drive base wherein the air outlet comprises an airflow indicator coupled to the air outlet for indicating whether air is moving in or out of the air outlet. The method further includes rotating a disk drive motor inside the disk drive and determining the motor spin direction of the disk drive motor based on whether the air is moving in or out of the air outlet.