Fiber paper

honggarae 12/03/2022 668

Materialintroduction

Impregnatedpaper,windingpaper,andcapacitorpaperaremadeofcorkwoodfromthepinefirfamily,withhighcellulosecontentandlongfibers.Thesepapersmadeofwoodcelluloseasthemaincomponentarecharacterizedbygoodimpregnation,hightearresistance,andthedielectricpropertiesofadipolemedium,buttheyhavepoorheatresistance.Thebreakdownstrength,dielectricconstantanddielectriclossofpaperallincreasewiththeincreaseofpaperdensity.Capacitorpaperrequireslowdielectriclossathightemperatures.Deionizedwatermustbeusedtofullywashawaysodiumandpotassiumionsinthepulpduringtheentirepapermakingprocess.Inordertoobtainhigherdielectricconstantandbreakdownstrength,capacitorpaperisverythin(suchas10microns),andthedensityisrelativelylarge(suchas1g/cm3).High-voltagecablepaperrequireslowdielectricconstantandlowdielectricloss.Inadditiontowashingthepaperwithdeionizedwater,thelogsmustbeselectedandthesodiumionsremovedbyelectrodialysisinthepapermakingprocess.Inordertoimprovecertainpropertiesoffiberpaper,thepulpcanbechemicallytreatedinthepapermakingprocesstochangeitsstructuretomakemodifiedpaper.Forexample,treatingsulphatepulpwithacrylonitrileliquidtocyanoethylatethehydroxylgroupsincellulosemacromoleculestoobtaincyanoethylatedpaperwitharelativedielectricconstantof15.5andhighheatresistance;glacialaceticacidisusedOraceticanhydridetreatssulphatepulptoacetylatecellulosetomakeacetylatedpaper,whichcanimprovethermalstabilityandreducehygroscopicity.Ifthepulpisnotchemicallytreated,butamineadditivesaredirectlyaddedtothepulp,amine-addedpapercanbeproducedwithgreatlyimprovedthermalstability(buttgδisalsogreater).

Classification

Syntheticfiberpaper

syntheticfiberpaper

Usesyntheticfibermaterials(suchasnylon,Vinylon,etc.)Papermadebywetordrymethod.

Hasgooduniformity.Higherdrystrengthandwetstrength.Heatresistance,waterresistance,strongfiltration,insulation,etc.Andexcellentappearanceperformance(suchasnoholes,nospots,nolargedust,etc.).Thepaperiswhiteandsmooth.Adhesivescanbeusedforbondingbetweensyntheticfibers.Itisalsopossibletousesyntheticfiberrawmaterialswithaminoandhydroxylgroupstogeneratestrengththroughhydrogenbonding.Itcanalsobeblendedintosomethermallysolublesyntheticfibermaterials.

Mostlyusedintheproductionofnon-wovenproducts,insulatingpaper,napkins,disposabletoiletpaperseriesordisposableclothing,medicalpaper,etc.Andsuchaswallpaper,mappaper,multi-layercardboard,batteryseparatorandsoon.

Theperformanceofsyntheticfiberpaperismainlydeterminedbytheperformanceofthefiberused.Forexample,thedielectricconstantanddielectriclossofpolypropyleneorpolyphenyleneetherpaperareverysmall,anditissuitableforinsulationofultra-highvoltagecablesabove500kV.Aramidpaper(Nom-expaper)haslowdielectricconstantanddielectricloss,hightemperatureresistance(breakdownstrengthat225°Cisabout95%ofthevalueatroomtemperature),moistureresistance,andsufficientheat-resistantoxygenAgingstability,flameretardancyandarcextinguishing,canbeusedasF~Hclassslotinsulationofmotors.Aramidpaperhasgoodcompatibilitywithmanyresins,andissuitableformanufacturingcrimped,wrinkledorstampedinsulatingparts,thermoformingwedgesandsoftlaminates,ormanufacturingviscousheatsealsandcoveringtapes.Thepolyaramidmicapapermadebymixingandbeatingpolyaramidfixed-lengthfibers,fibridsandpowdermicahashighcoronaresistance,breakdownstrength,thermalstability,arcresistance,andcreepageresistance.,Mechanicalstrength,uniformityanddimensionalstability,suitableforwrappinginsulation,slotinsulation,interlayerinsulation,intervalinsulation,V-ring,transformerinsulationandfireinsulationofvarioushigh-voltagemotorwiresandcoils.

Ceramicfiberpaper

Ceramicfiberpaperproductionprocess

CeramicfiberpaperismadeofceramicfiberThemainrawmaterialismadebywetmoldingprocess.Theceramicfiberpaperhasuniformthickness,smoothsurfaceandgoodflexibility.Itcanbecutorpunchedtobeprocessedintoproductsofvarioussizes.

Productperformanceofceramicfiberpaper

Fiber paper