Abstract: A liquid crystal polymer, composition, liquid crystal polymer film, laminated material and method of forming liquid crystal polymer film are provided. The liquid crystal polymer includes a first repeating unit, a second repeating unit, a third repeating unit, a fourth repeating unit, and a fifth repeating unit. The first repeating unit has a structure of Formula (I), the second repeating unit has a structure of Formula (II), the third repeating unit has a structure of Formula (III), the fourth repeating unit has a structure of Formula (IV), and the fifth repeating unit has a structure of Formula (V), a structure of Formula (VI), or a structure of Formula (VII) wherein A1, A2, A3, A4, X1, Z1, R1, R2, R3 and Q are as defined in the specification.

Abstract: A liquid crystal polymer, composition, liquid crystal polymer film, laminated material and method of forming liquid crystal polymer film are provided. The liquid crystal polymer includes a first repeating unit, a second repeating unit, a third repeating unit, and a fourth repeating unit. The first repeating unit has a structure of Formula (I), the second repeating unit has a structure of Formula (II), the third repeating unit has a structure of Formula (III), and the fourth repeating unit has a structure of Formula (IV), a structure of Formula (V) or a structure of Formula (VI) wherein A1, A2, A3, Z1, R1, R2, R3 and Q are as defined in the specification.

Abstract: A vacuum cleaner includes an elongate housing which has a front end wall defining an air inlet, a rear end wall defining an inserting hole, and a circumferential wall between the front and rear end walls to define a dust collecting chamber. An air impeller is disposed in the housing posterior to the dust collecting chamber to create a vacuum behind the air inlet. A handle includes a handgrip portion and an inserting shaft portion that is disposed to slidably move along a longitudinal guiding way, and that is retractable to be hidden in the elongate housing. The inserting shaft portion has a distal section relative to the handgrip portion. A retaining member is disposed on the circumferential wall adjacent to a rear segment of the guiding way. Two spring-loaded engaging members are respectively disposed in and are radially retractable to position such that the inserting shaft portion in a retracted or pulled-out position.

Abstract: A portable lock stitch sewing machine includs a driving mechanism, a transmitting mechanism and a number of guiding mechanisms. The function of the driving mechanism is to transfer a battery power to pivotally connected members to make them move as required by a user. The transmitting mechanism then transmits the power of the battery to related members to fulfill the sewing performance and the number of guiding mechanism are used to ensure the tension on threads.