Preparation process for suction head through silicification

Abstract

The invention discloses a preparation process for a suction head through silicification. The preparation process comprises the following steps: 1) weighing polypropylene resin and silicone masterbatch with a ratio of 98.5: 1.5; 2) respectively preparing the polypropylene resin and the silicone masterbatch into powder with a particle size of 100 to 300 meshes, then carrying out drying treatment, carrying out mixing under stirring, and allowing powder components to be uniformly mixed; 3) placing prepared raw materials into an injection molding machine, opening a water tower, a power switch and a machine power switch at the same time, and controlling a heating temperature of a material pipe in a range of 240 to 260 DEG C; 4) opening the main engine of the injection molding machine, and opening an air pump, wherein pressure is 6 MPa; 5) carrying out treatment for 1 minute under an electrostatic ion removal blower gun; and 6) carrying out boxing and encasing. According to the process provided by the invention, the silicone masterbatch is a solid form of organic silicone oil, and is directly added into plastic particles in the process of production of the suction head, so operation is simple, convenient and reliable; high proportion of the silicone masterbatch affects transparency of a product; meanwhile, low proportion of the silicone masterbatch may not achieve a silicification treatment effect and affects the quality of the product.

Description

technical field [0001] The invention relates to the field of straw preparation technology, in particular to a siliconized preparation method for straws. Background technique [0002] Suction tips are biological consumables used in emerging and high-tech fields such as life sciences and biomedicine. Tips, like bullets in a gun, are an integral part of a pipette. As we all know, the accuracy and precision of pipetting not only require the matching of the tip and the pipette, but also the tip suitable for the liquid. The adsorption capacity of the liquid and the surface of the tip is negatively correlated with its surface tension, that is, the greater the tension, the easier it is to absorb, and the smaller the tension, the less easy it is to absorb. Low adsorption tips can significantly reduce the adsorption of liquids to significantly improve the accuracy of pipetting operations. . Especially when pipetting liquids containing detergents, it has obvious advantages over ordi...

AI Technical Summary

Problems solved by technology

This treatment process has the following disadvantages: 1. The treatment process is cumbersome, time-consuming and laborious, and is not suitable for large-scale production of tips; 2. The treatment liquid may remain on the surface of the tip, which may contaminate biological samples during the use of the tip; 3. , The solvent used in the process may pollute the environment