March, 2013
No. 449

BWF Envirotec is Extending its Product Portfolio with the PM-TEC Membrane Product Line

 For more than 20 years now, BWF Envirotec has been producing innovative filter media for industrial filtration. BWF Envirotec is now extending the product portfolio with the new PM-Tec product line and is offering new filter media specifically used in filtration of minute dust particles. The name for the new product line originates in the English term for fine dust, “particulate matter.” The term particulate matter was coined at the end of the ‘80s by the U.S. environment protection authority, the Environmental Protection Agency (EPA) which introduced in the form of the so-called PM standard a classification in measurement of fine dust. This fine dust categorization is now used internationally for classification of fine dust.

 The new PM-Tec product line represents the highest demands on a filter medium for industrial filtration. BWF Envirotec combines in the new product line first-rate carrier media consisting of needlona® needle felt or fiberglass fabric with a high-efficiency ePTFE membrane and the decades of experience in filter medium production. The continuous in-house process chain, starting with the manufacture of needlona® filter media, including the laminating process, to finishing of complete filter bags guarantees the high quality standard of PM-Tec.

 The product line consists of a carrier medium on which an ePTFE membrane is laminated. The membrane produced from polytetrafluorethylene possesses characteristics which are optimally suited for use in industrial fine dust filtration.

 Dust on the raw gas side impinges on the filter medium, is already retained on the surface and cannot penetrate into the carrier medium. Owing to the smooth and anti-adhesive surface, the particles do not embed themselves in the carrier medium but accumulate on the surface of the filter medium instead and are almost completely cleaned away during the dedusting process in the filtration system.

 BWF Envirotec gives utmost priority to the latest state-of-the-art and ideal characteristics of the individual components in the new PM-Tec product line. The membrane structure is characterized by optimum orientation and fineness of the fibrils, in addition to a uniform pore size. A low-surface tension which reduces the adhesion of fine dusts in addition to a temperature resistance of up to 288° Censure optimum filtration properties. During the production process too, BWF Envirotec has perfected the manufacture of filter media. Consequently, in-line quality controls and constant air permeability monitoring are performed during the laminating process. The membrane-compatible presentation of the filter media during the entire production process ensures maximum quality. The most demanding emission requirements can be fulfilled by appropriate sewing and sealing technology during the manufacturing process.

 Extremely low and stable differential behavior, constant gas volumetric flow, long service lives, low maintenance expenditure and utmost reliability furthermore characterize the PM-Tec product line from BWF Envirotec.

 The PM-Tec product line for fine dust filtration is available with two different carrier media.

 Fiberglass fabric offers high temperature resistance and is therefore encountered as a carrier for the ePTFE membrane in many industrial applications. The prerequisite for many years of successful use is a moderate gas composition and low mechanical stress of the fiberglass fabric during operation in addition to a specifically-adapted pretreatment of the fabric during manufacture. Under aggressive conditions of use, a carrier medium made of a customized needlona® needle felt can be selected that withstands the chemical and mechanical demands for a longer period that the fiberglass and therefore achieves longer service lives.

 BWF Envirotec supplies the new product line as material from the roll for manufacturers of filter bags and as made-up filter bags for manufacturers or operators of industrial dedusting plants.

Back to Fabric Filter Newsletter No. 449 Table of Contents