Abstract: The present disclosure relates to a window assembly having a ventilation function and a horizontal close-fitting function, and more particularly to a horizontal close-fitting window assembly for implementing crime prevention and security functions by preventing a window from being open even in a ventilated state with the outside in which the window is slightly open and conveniently opening the window.

Abstract: The present disclosure relates to a windows and doors assembly having a ventilation function and a horizontal contact function, and more particularly to a horizontal contact windows and doors assembly for crime prevention and security functions by preventing a window from being open even when the window is slightly open and it is possible to ventilate with the outside air.

Abstract: The present disclosure relates to a window assembly having a ventilation function and a horizontal close-fitting function, and more particularly to a horizontal close-fitting window assembly for implementing crime prevention and security functions by preventing a window from being open even in a ventilated state with the outside in which the window is slightly open and conveniently opening the window.

Abstract: The present disclosure relates to a windows and doors assembly having a ventilation function and a horizontal contact function, and more particularly to a horizontal contact windows and doors assembly for crime prevention and security functions by preventing a window from being open even when the window is slightly open and it is possible to ventilate with the outside air.

Abstract: Disclosed is a method of producing a microporous polymer membrane, comprising: providing a polymer material; melting the polymer material; forming a precursor film by cooling and crystallizing the molten polymer material using an air knife; extending the precursor film; annealing the extended precursor film, primary stretching the annealed precursor film; forming a preliminary membrane by subjecting the primary stretched film to secondary stretching at a high temperature, and forming a microporous polymer membrane by heat setting the preliminary membrane. A microporous polymer membrane produced by the method is also provided.

Abstract: Disclosed is a method of producing a microporous polymer membrane, comprising: providing a polymer material; melting the polymer material; forming a precursor film by cooling and crystallizing the molten polymer material using an air knife; extending the precursor film; annealing the extended precursor film, primary stretching the annealed precursor film; forming a preliminary membrane by subjecting the primary stretched film to secondary stretching at a high temperature, and forming a microporous polymer membrane by heat setting the preliminary membrane. A microporous polymer membrane produced by the method is also provided.