How to distinguish the coated polyester filter bag?
The filter material of film covered polyester filter bag is a new filter material with low resistance, high filtration degree and long life. Its excellent effect is incomparable with that of ordinary filter materials. At present, it is widely used in stainless steel plate, concrete, rare metal, carbon black and other posts, with good expected effect. The glass fiber covered sub membrane filter material is a heat-resistant vacuum cleaner bag, that is, heat resistance is at least the effect of the glass fiber covered sub membrane filter material. However, when the temperature of the bonded glass fiber covered sub membrane filter material reaches about 80 ℃, the adhesive used for bonding will dissolve long ago. At this time, the covered sub membrane will fall off, the friction resistance will expand, and a series of worrying negative effects will occur, The laminated glass fiber covering sub membrane filter material (PTFE microporous plate membrane is covered with glass fiber needle punched non-woven fabric by high-temperature bonding technology, and all adhesives are not used in the whole production process) continues to work under the geographical environment of no more than 260 ℃, and its effect is not easy to change.
Due to the diversity of application sites of the bag of the glass fiber coated dust remover, it seems important to identify the quality of the glass fiber coated sub membrane dust removal filter material. The following is a summary of how to identify the product quality problems of glass fiber coated sub membrane filter materials without special equipment. Visual identification method for Chinese samples provided by the manufacturer:
1. Hand feel. The handle of the glass fiber covered sub membrane filter material produced by pressing technology is very smooth, but the surface layer of the bonded glass fiber covered membrane filter material has an obvious wet and cold feel. The wet and cold feeling level of products from different manufacturers is different, but in any case, the handle of the two materials is significantly different.
2. 90% of the common adhesives for viscose glass fiber coated sub membrane filter materials are common solution adhesives. Therefore, if this adhesive is placed in the solvent for a little immersion, the adhesive will lose its expected effect. At this time, the membrane can be simply removed from the glass fiber needle punched non-woven fabric. Common solvents include n-hexane, macrolides, long-chain fatty acids, etc.
3. The use of bonded glass fiber covered sub membrane filter material can not resist heat, which can be increased to about 100 ℃. Now, it is possible to needle non-woven fabric from glass fiber to non-woven fabric from glass fiber, but the laminated glass fiber covered filter material can not peel off the covered membrane when the temperature reaches 300 ℃.