Plastic object for use in personal hygiene

A method for producing an article used in personal hygiene having a treatment head, a handle and a neck part connecting the treatment head and the handle, the article having a proximal end and a distal end and a midpoint between the proximal and distal ends, the treatment head being disposed at the distal end, the proximal end being opposite to the distal end, and the article including at least two molded parts, the method comprising:

• forming at least part of the handle from a first plastic material by injection molding a first of the at least two molded parts, the first molded part defining at least a portion of the exterior of the handle;
• subsequently injection molding a second of the at least two molded parts from polypropylene material, the second molded part defining a portion of an interior of the handle and an end part at the proximal end of the article, such that one of the first and second molded parts is at least partially enclosed by the other, the second molded part bearing the treatment head at the distal end of the article and forming the neck part, wherein the polypropylene material does not form a chemical bond with the first plastic material during the injection molding;
• and
• providing at least one of the first and second molded parts with at least one further part, of a different material than the first and second molded parts, the at least one further part being formed of thermoplastic elastomer, wherein
• at least a portion of the first molded part extends between the midpoint and adjacent to the end part at the proximal end of the article.

A method for producing an article used in personal hygiene having a treatment head, a handle and a neck part connecting the treatment head and the handle, the article having a proximal end and a distal end and a midpoint between the proximal and distal ends, the treatment head being disposed at the distal end, the proximal end being opposite to the distal end, and the article including at least two molded parts, the method comprising:

• forming at least part of the handle from styrene acrylonitrile, acrylonitrile-butadiene styrene or polyester material by injection molding a first of the at least two molded parts, the first molded part defining at least a portion of the exterior of the handle;
• subsequently injection molding a second of the at least two molded parts from polypropylene material, the second molded part defining a portion of an interior of the handle and an end part at the proximal end of the article, the second molded part bearing the treatment head at the distal end of the article and forming the neck part;
• and
• providing at least one of the first and second molded parts with at least one further part, the at least one further part being formed of thermoplastic elastomer, wherein
• at least a portion of the first molded part extends between the midpoint and adjacent to the end part at the proximal end of the article.

A method for producing a toothbrush having a brush head, a handle and a neck part connecting the brush head and the handle, the toothbrush having a proximal end and a distal end and a midpoint between the proximal and distal ends, the brush head being disposed at the distal end, the proximal end being opposite to the distal end, and the toothbrush including at least two molded parts, the method comprising:

• forming at least part of the toothbrush handle from a first plastic material by injection molding a first of the at least two molded parts, the first molded part defining at least a portion of an exterior of the handle, the forming at least part of the toothbrush handle including forming projections or recesses on the first molded part on at least part of a contact surface;
• and
• subsequently forming the neck part from a second plastic material by injection molding a second of the at least two molded parts bearing the brush head at the distal end of the toothbrush, the second molded part defining a portion of an interior of the handle and an end part at the proximal end of the article, the second plastic material being injection molded around or into the first molded part at the contact surface so that the second plastic material is molded with diametrically opposed corresponding projections or recesses so that the first and second molded parts engage and mechanically join to one another without the second plastic material forming a chemical bond with the first plastic material, wherein
• at least a portion of the first molded part extends between the midpoint and adjacent to the end part at the proximal end of the article.

A method for producing an article used in personal hygiene having a treatment head, a handle and a neck part connecting the treatment head and the handle, the article having a proximal end and a distal end and a midpoint between the proximal and distal ends, the treatment head being disposed at the distal end, the proximal end being opposite to the distal end, and the article including at least two molded parts, the method comprising:

• forming at least part of the handle from a first plastic material by injection molding a first molded part, the first molded part defining at least a portion of an exterior of the handle;
• subsequently forming the neck part from a second plastic material by injection molding a second molded part, the second molded part defining a portion of an interior of the handle and an end part at the proximal end of the article, the second molded part bearing the treatment head at the distal end of the article, so that one molded part of the first and second molded parts is at least partially enclosed by the other molded part;
• and
• providing at least one of the first and second molded parts with at least one further part, of a different material than the first and second molded parts, the at least one further part being formed of thermoplastic elastomer, wherein
• at least a portion of the first molded part extends between the midpoint and adjacent to the end part at the proximal end of the article.