Abstract: Disclosed herein is a biodegradable polyolefin fiber comprising a core formed of polyolefin and an oxide layer formed outside the core according to an embodiment of the present invention. According to the present invention, the polyolefin fiber is capable of having biodegradable properties by mixing raw materials and the biodegradable additive in a specific condition. In addition, the oxide layer is formed on the surface of the polyolefin fiber, thereby improving the initial oxo-biodegradation rate and reducing the biodegradation time.

Abstract: A washer liquid supply valve includes a valve body provided with an inflow hole and a discharge hole configured to allow a washer liquid to flow into and out of the valve body therethrough, a housing detachably combined with an upper part of the valve body, a coil assembly installed in the housing and configured to generate magnetic force when power is applied to the washer liquid supply valve, a core combined with the coil assembly while penetrating the coil assembly and magnetized by the magnetic force generated by the coil assembly, plunger installed in the core so as to be movable and configured to be moved upwards when power is applied to the washer liquid supply valve, and a spring interposed between the core and the plunger so as to elastically support the plunger towards the valve body.