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Double-layer filter element for suction head of pipettor

A technology of pipettes and filter elements, which is applied in the direction of filtration and separation, measuring tubes/pipettes, chemical instruments and methods, etc. It can solve the problems of single color and cannot fully meet the application needs, and achieve the effect of low cost

Inactive Publication Date: 2014-12-10
SHENZHEN BIOCOMMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current filter tip, the part that may be in contact with the sample is pure material, the tip itself is transparent polypropylene, and the filter element is white UHMW-PE with a single color
[0018] In summary, the existing pipette filter elements cannot fully meet the application needs

Method used

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  • Double-layer filter element for suction head of pipettor
  • Double-layer filter element for suction head of pipettor
  • Double-layer filter element for suction head of pipettor

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Activated carbon double layer filter

[0039] The thickness of the activated carbon double-layer filter element is 4mm, divided into upper and lower layers, and the thickness is 2mm. Both the upper and lower filter layers are sintered with UHMW-PE powder with a particle size of 100-200 mesh. In particular, 5% mass ratio of activated carbon (300-1000 mesh) is added to the UHMW-PE powder of the upper filter layer. The upper and lower filter layers have the same pore size.

Embodiment 2

[0041] Water-closed double-layer filter element

[0042] The thickness of the water-sealed double-layer filter element is 4mm, divided into upper and lower layers, the thickness of the lower filter layer is 1.5mm, and the thickness of the upper filter layer is 2.5mm. The lower filter layer is sintered with UHMW-PE powder with a particle size of 100-200 mesh, the upper filter layer is sintered with UHMW-PE powder with a particle size of 200-300 mesh, and 1% by mass of sealing agent expansion resin is added to the upper UHMW-PE powder. The pore diameters of the upper and lower filter layers are different, the lower layer has a larger pore size and the upper layer has a smaller pore size.

Embodiment 3

[0044] Dual color filter

[0045] The thickness of the two-color filter element is 3.0mm, which is divided into upper and lower layers, and the thickness is 1.5mm. The upper and lower filter layers are sintered with UHMW-PE powder with a particle size of 100-200 mesh, especially adding 0.5% by mass iron oxide red powder to the UHMW-PE powder of the upper filter layer. The upper and lower filter layers have the same pore size.

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Abstract

The invention discloses a double-layer filter element for a suction head of a pipettor. The double-layer filter element for the suction head of the pipettor is characterized in that a lower filtering layer of the double-layer filter element is made of pure UHMW-PE or HDP, and functional materials are added into an upper filtering layer outside materials used for the lower filtering layer and contain one or more of water swelling agents, activated carbon and dyes; the pore diameters of the upper filtering layer and the lower filtering layer of the double-layer filter element are 1-100 um, which can be consistent; the overall thickness of the double-layer filter element is 2.0-8.0 mm. Through the double-layer filter element, various application demands like the absorption of dangerous and highly-infected samples, the separation of smaller matters, automatic identification, product personalization and the like can be met.

Description

technical field [0001] The invention belongs to the field of experimental consumables, and relates to a double-layer filter element used for pipette tips. Background technique [0002] Pipettes are commonly used tools for liquid transfer and sample suction in laboratories, and the matching suction heads (also known as suction nozzles) are matching consumable materials. Tips are usually injection molded from polypropylene (PP), available in 10μL, 100μL, 200μL, 1000μL and 5mL specifications. The pipette is a precision device for long-term use, and the tip is for one-time use. When sucking liquid, the piston device of the pipette is pressed down to push out the air in the sleeve. When the pressure is released, a certain volume of negative pressure is formed in the sleeve, and the suction head connected to the sleeve absorbs a certain volume of liquid. . The accuracy of the liquid absorption depends on the following factors: one is to accurately release the air volume in the ...

Claims

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Application Information

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IPC IPC(8): B01L3/02B01D35/02
Inventor 陈高明胡玉梅
Owner SHENZHEN BIOCOMMA TECH
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