L 25 E - kphuaxun.com

1 TECHNICAL DATA SHEETGRILAMID L 25 General product descriptionGrilamid L 25 is a high viscosity product has the following features: Very tasteless high toughness, even at low tempera-tures Good resistance to weathering Good chemical resistance Mechanical properties only slightly de-pendent on relative humidity Significantly lower water absorption thanpolyamide 6 Application examplesGrilamid L 25 is suitable for the manufactureof blown and cast film being mono or L 25 is used for sausage skins forprecooked sausages and packaging films fordeep-frozen PropertiesStandardUnitGrilamid L 25 Melting pointDSCISO 11357 C178 Melt volume rate

2 (MVR)275 C / 5 kgISO 1133cm /10 min20 General PropertiesDensityISO 1183g/cm absorption23 62% absorption23 C/50 % RHISO 62% )EMS%--Gloss60 ISO 2813-150 HazeISO 14782%--Barrier Properties (50 m films)O2-Transmission rate23 C/ 0 % RHDIS/ISO 15105-1cm /m 24h bar35023 C/85 % RHcm /m 24h bar370CO2-Transmission rate23 C/ 0 % RHDIS/ISO 15105-2cm /m 24h bar150023 C/85 % RHcm /m 24h bar1600 Moisture vapour transmission rate23 C/85 % RHDIS/ISO 15106-1g/m 24h8 Mechanical PropertiesTensile E-ModulusISO 527-2 MPa1100 Stress at yieldParallelNormalISO 527-3 MPa3535 Strain at yieldParallelNormalISO 527-3%66 Stress at breakParallelnormalISO 527-3 MPa8070 Strain at breakParallelNormalISO 527-3%850900 Tear

3 ResistanceParallelNormalISO 6383-1N/mm2025 Elmendorf tear resistanceParallelNormalISO 6383-2N1010 Dart drop impactABISO 7765-1g----Notched impact strengthCharpy, 23 CISO 179 /2-1eAkJ/m impact strengthCharpy, -30 CISO 179 /2-1eAkJ/m cyclesEMSholes/ m 1300 Product nomenclature acc. ISO 1874: PA 12, E, 24-0101) 80 m film applicated on 160 m Iononmer, biaxially oriented at 70 C (draw ratio 2:1), afterwards shrinkage in water at 85 C3 Stress & Strain Grilamid L 25 Viscosity function Grilamid L 2501020304050607080900100200300400500600 7008009001000strain [ % ]stress [MPa]parallelnormal101001000100001010010 0010000shear rate [1/s]shear viscosity [Pa*s]

4 230 C250 C270 C4 Processing information for the extrusion of Grilamid L 25 This technical data sheet for Grilamid L 25 providesyou with useful information on material preparation,machine requirements and PREPARATIONG rilamid L 25 is delivered dry and ready for proc-essing in sealed, air tight packaging. Predrying isnot , undamaged bags can be kept over a longperiod of time in storage facilities which are dry,protected from the influence of weather and wherethe bags can be protected from and safetyDetailed information can be obtained from the Material Safety Data Sheet (MSDS) which can berequested with every material L 25 is dried and packed with a moisturecontent of less than %.

5 The processing ofmoist material reduces the optical and mechanicalquality of the application. A too high moisture con-tent can result in fish eyes, streaks and can be done as follows:Temperature:max. 80 CTime:4 - 12 hoursDew point of the dryer:-30 CTemperature:max. 100 CTime:4 - 12 hoursDrying timeIf there is only slight evidence of foaming of the meltor just traces of silver streaks on the part, then theabove mentioned minimal drying time will be suffi-cient. Material, which is stored in open over days,which shows strong foaming, is unusually easyflowing melt or streaks on the article, then themaximal drying time is temperaturePolyamides are subjected to the affects of oxidationat temperatures above 80 C in the presence ofoxygen.

6 Visible yellowing of the material is an indi-cation of oxidation. Hence temperatures above80 C for desiccant dryers and temperatures above100 C for vacuum ovens should be longer residence times (over 1 hour) hopperheating or a hopper dryer (80 C) is REQUIREMENTSG rilamid L 25 can be processed economically andwithout problems on all extrusion lines suitable protected, Universal 3 zone screws are :24 D - 30 DCompression - least three separately controllable heatingzones, capable of reaching cylinder temperaturesof up to 270 C are recommended.

7 The cylinderflange and adapter must be able to be the start up of processing Grilamid L 25 thefollowing parameters can be recommended:Hopper15 - 60 CZone 1210 - 230 CZone 2230 - 250 CZone 3230 - 250 CAdapter230 - 250 CMould230 - 250 CDie240 - 250 CMelt230 - 250 CIn cases where the use of grooved feed zones isemployed it is recommended to temper this zonebetween 60 and 120 dryerVacuum ovenTemperatures5 CUSTOMER SERVICESEMS-GRIVORY is a specialist in polyamide synthe-sis and the processing of these materials.

8 Our cus-tomer services are not only concerned with themanufacturing and supply of engineering thermo-plastics but also provide full technical support in-cluding: Rheological design calculation / FEA Prototype tooling Material selection Processing support Mould and component designWe are happy to advise you. Simply call one of oursales recommendations and data given are based on ourexperience to date, however, no liability can be assumedin connection with their usage and