The present invention relates to a glass yarn provided with a coating made of a polymer selected from among the vinyl acetate/vinyl chloride, polyvinyl chloride, and polyvinylidene chloride copolymers, and containing a silane having the formula Si(R1)(R2)(R3)(R4), where: R1, R2, R3, identical or different, are a C1-C6 alkyl group, a C2-C6 alkenyl group, a C2-C6 alkynyl group, a C6-C10 aryl group, a hydroxyl group, a C1-C6 alkoxy group, a C6-C10 aryloxy group, a C1-C6 acyloxy group, or a C2-C7 alkylcarbonyl group, wherein at least two of the R1, R2, R3 groups are a hydroxyl group or an alkoxy group； and R4 is a group containing at least one epoxy function, an optionally substituted aryl group, a halogen atom or a group having at least one halogen atom, in particular fluorine, a group containing at least one aldehyde function, a group having at least one function containing a sulphur or phosphorous atom, or an acryloxy or methacryloxy group, wherein said group having the aforementioned functions is a C1-C18 carbon group, preferably C1-C8, which can contain at least one oxygen or sulphur heteroatom. The invention also relates to a screen made from the glass yarn having said coating, in particular in the form of a lattice, fabric, or knitted fabric that can be used as a mosquito net.La presente invención se relaciona con un hilo de vidrio provisto con el recubrimiento hecho de un polímero seleccionado de entre acetato de vinilo/cloruro de vinilo, cloruro de polivinilo, y copolímeros de cloruro de polivinilideno, y que contiene un silano que tiene la fórmula Si (R1) (R2) (R3) (R4), donde: R1, R2, R3, idénticos o diferentes, son un grupo alquilo de C1-C6, un grupo alquenilo de C2-C6, un grupo alquinilo de C2-C6, un grupo arilo de C6-C10, un grupo hidroxilo, un grupo alcoxi de C1-C6, un grupo ariloxi de C6-C10, un grupo aciloxi de C1-C6, o un grupo alquilcarbonilo de C2-C7, donde al menos dos de los grupos R1, R2, R3 son un grupo hidroxilo o un grupo alcoxi； y R4 es un gru
