| 摘要 |
The invention relates to a process for producing a pipette (10) with a capacity of from 1 to 50 ml from a thermoplastic polymer. An essentially cylindrical pipette shaft (12) with an internal diameter (d<SUB>i</SUB>) and an essentially cylindrical cup-shaped pipette reservoir (16) with an internal diameter (D<SUB>i</SUB>) are produced in an injection molding process. The pipette shaft (12) has, at one end, a pipette tip (14) which narrows to a suction/exit orifice (20), and, at the other end, a conical widening (18). The pipette reservoir (16) has a suction nozzle (24) abutting coaxially from the bottom of the pipette reservoir (16). The conical widening (18) is welded or adhesive-bonded at the end and coaxially to the pipette reservoir (16). The ratio of the total pipette length (L) to the arithmetic mean of the internal diameters (d<SUB>i</SUB> and D<SUB>i</SUB>) of the pipette shaft (12) and of the pipette reservoir (16) is at least 15. The pipette may have a suction nozzle (24) with a clamping means for a cotton wool bud. |
