Regeneration method of blade rubber and manufacturing method of regenerated blade rubber

A regeneration method of blade rubber of a wiper blade

• in which at least a part of the blade rubber constitutes a contact portion with a wiping target object,
• the regeneration method comprising:
• preparing the blade rubber to be regenerated;
• and
• entering a cutting blade into the blade rubber from a side portion of the blade rubber at one end portion A of the blade rubber, and moving the cutting blade relative to the blade rubber toward another end portion B of the blade rubber to remove at least a part of the contact portion, wherein
• a storage elastic modulus at a vibration frequency of 1×103 Hz measured in an environment at a temperature of 24° C. by using a sample sampled from the blade rubber to include at least a part of the contact portion is 90.0 to 500.0 MPa, and
• a breaking stress of the sample measured in an environment at a temperature of 24° C. is 4.2 to 30.0 MPa.