Glass Microfiber Filters for Laboratory Filtration

As a supplier of laboratory consumables for many years, Cobetter is committed to providing products with competitive price, accurate test results and short delivery time for our customers.  

Cobetter uses natural materials to ensure consistent high quality, reproducibility and uniformity in every filter paper. Each filter paper is rigorously tested before packaging in terms of weight, thickness, air flow rate and mechanical strength.

Glass fibre filter paper is widely used in laboratory filtration and separation due to their high filtration accuracy, high flow rates, super low pressure drop, high load capacity, low extractables and good chemical compatibility.

Applications

- Basic Analysis

- Food & Beverage

- Pharmaceutical Research

- Air Monitoring

The membranes are made from pure borosilicate glass fiber, the large surface area and deep structure provide high impurity retention efficiency and low filtration resistance. Glass fibre filter membranes can adsorb particles down to 0.7um in liquids and <1um in air and gases. It is also resistant to temperature of 500°C.

Features and Benefits

- High retention rate of fine particulate matters

- Good erosion resistance

- High flow rate

- Binder free

Specifications

• 98% particle retention rate

The glass fiber membrane is made of pure borosilicate glass fibre. The binder is added to enhance the mechanical strength of the glass fibre membrane and is mainly used to filter coarse particles (e.g. macromolecules, dust).

In order to avoid chemical reactions with the filtered material, glass fibre membranes with inorganic binders are used for the filtration of organic substances and glass fibre membranes with organic binders are used for the filtration of inorganic substances.

Features and Benefits

- High wet mechanical strength

- High erosion resistant

- High flow rate, high retention

- With binder

Specifications

TCLP Testing Filters (Acid-treated with low metal content)

For a long time we have been using landfills to dispose of solid waste, but the solid waste leachate from landfills is continuously polluting the groundwater and soil. With the accumulation of time, usually 3-5 years the waste leachate will pollute 1-2km of soil and groundwater in the landfill area, this process persists for 10-20 years, the pollution area will gradually expand.

We need to constantly monitor the spread of contaminants in the area around the solid waste landfill, continually assess the potential risks, recover and dispose of waste leachate in a sound manner. The TCLP approach is commonly used in the assessment of landfill solid waste contamination risks.

To dispose of hazardous waste in a United States municipal landfill, TCLP limits must fall within standard levels set for maximum contamination levels (MCLs). 

Cobetter TCLP glass fiber membranes is made from 0.7 micron density, binder free glass fiber paper, which is acid-treated with low metal content to support TCLP testing by providing accurate information about TCLP limits to ensure the disposal plan.

Specifications

Gas-Absorption Filters (Copper acetate treatment)

In the detection process of gas sensor, the composition of the detected gas is often complex, and it is easy to create cross interference between different gases. For example, for gas sensor that is indicated to detect carbon monoxide, hydrogen could be also on the gas sensor if hydrogen’s concentration is high in the test environment. Then hydrogen may also react and get a signal that the concentration of carbon monoxide is higher than the actual volume.

In order to reduce the interference of some non-specific gases in air detection process, Cobetter glass fiber membrane with copper acetate treatment can absorb some interfering gases in the air, such as H2S, HMDS, etc.

Features and Benefits

- Rapid diffusion speed.

- High adsorption capacity.

- Efficient adsorption for interfering gases.

- Low chemical background, no adsorption on detected gas.

- Provide customization with a variety of specifications and treatment options. 

Pure borosilicate glass microfibers reinforced with woven glass cloth and bonded with PTFE. Both glass and PTFE display great chemical and thermal resistance properties and their combination permits the application in many of the high demanding filtration environments.

Features and Benefits

- High dimensional stability and high porosity

- High temperature resistance

- Great creep and wear resistance 

- Broad chemical compatibility

- Good electrical insulation properties

- Low air resistance

- Low moisture

Applications

- Aerosol sampling tests

- Diesel exhaust monitoring

- Stack emission sampling tests

- Ambient air monitoring for particulate concentration

- Waste incinerator with high temperature, high viscosity dust flue gas purification

- Flue gas purification of the iron and steel smelting blast furnace gas

- Carbon black, coking furnace flue gas purification

- Chemical industry, metallurgy, cement and other industries

- Flue gas dry desulfurization of power plant coal fired boiler