Vehicle wiper blade

A vehicle wiper blade comprising:

• a blade support part;
• a neck;
• and
• a lip part coupled swingably with the blade support part via the neck, the neck being narrowed in width with respect to the blade support part and the lip part in a cross section in a direction orthogonal to a longitudinal direction of the wiper blade,
• a part of the lip part being brought into contact with a surface of a to-be-cleaned member, and thereby the surface of the to-be-cleaned member being cleaned,
• the lip part comprising polyurethane, the polyurethane comprising a reactant of a composition including:
• an isocyanate compound which includes diisocyanate and tri- or higher functional polyfunctional isocyanate;
• and
• an alcohol which includes tri- or higher functional polyfunctional alcohol,
• the diisocyanate having an aromatic ring in a molecule thereof,
• wherein when the polyurethane is heated up to 1000° C. at a temperature rise rate of 10° C./s using a mass spectrometer of direct sample introduction type in which a sample is heated and vaporized in an ionization chamber and a molecule of the sample is ionized, then obtained
• a detected amount of all ions is defined as M1,
• an integrated intensity of a peak in an extracted ion thermogram corresponding to a range of an m/z value derived from the tri- or higher functional polyfunctional isocyanate is defined as M2, and
• an integrated intensity of a peak in an extracted ion thermogram corresponding to a range of an m/z value derived from the diisocyanate is defined as M3,
• M2/M1 is 0.001 to 0.028,
• M3/M1 is 0.020 to 0.110,
• M2/M3 is 0.013 to 0.300, and
• a concentration of the tri- or higher functional polyfunctional alcohol in the polyurethane is 0.12 mmol/g to 0.65 mmol/g.