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: An injection molding machine includes a threaded rod, a shaft coupling, and a stopping slab; the shaft coupling is connected at a first end to an oil hydraulic motor; the threaded rod is inserted in an axial hole in the second end of the shaft coupling; the shaft coupling has a hollow detainment portion adjacent to the axial hole; the stopping slab is secured on the second end of the shaft coupling, and has a receiving hole, and a groove adjacent to the receiving hole; the groove is faced with only a portion of the hollow detainment portion, and in turn an opening of the hollow detainment portion is partly covered and blocked by the stopping slab; the threaded rod has a wedging protrusion thereon, which is loosely confined in the detainment portion; therefore, the wedging protrusion can be relocated between blocked and unblocked sections of the hollow detainment portion.