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Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air circulation. It is utilized to separate great compounds from liquids or air.

Filter paper can be found in different porosities and grades depending on the applications it is implied for. The important specifications are wet strength, porosity, particle retention, circulation rate, efficiency, capacity and compatibility.
There are 2 systems of filtration with paper; volume and surface. By volume filtration the particles are caught in the bulk of the filter paper. By surface area purification the particles are caught on the paper surface. Filter paper is mainly utilized due to the fact that even a little piece of filter paper will soak up a significant volume of liquid.

The raw products are various paper pulps. The pulp might be from softwood, hardwood, fiber crops, mineral fibers. For high quality filters, dissolving pulp and mercerised pulpare utilized. A lot of filter papers are made on little paper machines. For laboratory filters the makers may be as little as 50 cm width. The paper is often crêped to improve porosity. The filter papers may also be treated with reagents or impregnation to get the right residential or commercial properties.


Air filters

The main application for air filters are combustion air to engines. The filter papers are transformed into filter cartridges, which then is fitted to a holder. The construction of the cartridges primarily needs that the paper is stiff enough to be self-supporting. A paper for air filters needs to be extremely porous and have a weight of 100 - 200 g/m2. Normally especially long fibrous pulp that is mercerized is used to obtain these homes. The paper is usually fertilized to enhance the resistance to moisture. Some sturdy qualities are made to be rinsed and thus extend the life of the filter

Coffee filter

Coffee filters of paper are made from about 100 g/m2 creped paper. The creping allows the coffee to flow easily in between the purification and the filter funnel. The raw materials (pulp) for the filter paper are coarse long fiber, often from fast growing trees. Both unbleached and bleached qualities are made. [2] Coffee filters are made in different shapes and sizes to suit various holders. Essential criteria are strength, compatibility, capacity and performance.

Fuel filters

The paper used for fuel filters is a crêped paper with controlled porosity, which is pleated and injury to cartridges. The raw product for filter paper used in fuel filters are made from a mixture of hardwood and softwood fibers. The basis weight of the paper is 50 - 80 g/m2.

The Green Book leading industrial, commercial, and consumer directory in Singapore offers various Filter Paper from different Companies that can attend to various filter paper needs fast and easy.

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