AKROMID® S brochure A4 - AKRO-PLASTIC GmbH

AKROMID® S series (Polyamid 6.10)Although sebacic acid-based polyamideswere developed and commercialisedas early as the 1950s,they remained niche products onthe market, due to the promotionof large-scale industrial standardproducts. In recent years, however,the plastics processing industry hasseen a steadily growing interest inmaterials based on renewable resources.AKRO-PLASTIC GmbH is fullycommitted to meeting the demandsgenerated by this interest.Focusing on the development of polyamidespecialities, we have thereforedeveloped a renewable resource-basedpolyamide 6.10 whichhas ushered in a veritable renaissanceof this material.In the overview on the right and onthe following pages, you will findtechnical data and possibilities for awhole host of technically innovativeapplications with a lower environmentalpollution.Typical values fornatural colour material at 23° CMechanical PropertiesTestSpecificationTestMethodTensile modulus 1 mm/min ISO 527-1/2Yield stress²/Tensile stress at break 5 mm/min ISO 527-1/2Elongation at break 5 mm/min ISO 527-1/2Flexural modulus 2 mm/min ISO 178Flexural strength 2 mm/min ISO 178Charpy impact strength 23 °C ISO 179-1/1eUCharpy impact strength -30 °C ISO 179-1/1eUCharpy notched impact strength 23 °C ISO 179-1/1eACharpy notched impact strength -30 °C ISO 179-1/1eABall indentation hardness *HB 961/30 ISO 2039-1Electrical PropertiesComparative tracking index, CTI Test solution A IEC 60112Thermal PropertiesMelting point DSC, 10 K/min ISO 11357-1Heat distortion temperature, HDT/A 1.8 MPa ISO 75-1/2Heat distortion temperature, HDT/B 0.45 MPa ISO 75-1/2Heat distortion temperature, HDT/C 8 MPa ISO 75-1/2FlammabilityFlammability acc. to UL 94 0.8 mm UL 94Burning rate acc. to FMVSS 302 (< 100 mm/min) > 1 mm thickness FMVSS 302¹ = mould temperature: 80 °CMelt temperature: 270 °CInjection pressure: 750 barCross section of flow spiral: 7 mm x 3.5 mm² = yield stress and elongation at break:testing speed 50 mm/minn.b. = not broken+ = passed“cond.” test values = conditioned, measured ontest specimens stored according to ISO 1110“d.a.m.” = dry as moulded test values = residualmoisture content < 0.10 %*Test condition unreinforced = HB 358/30General PropertiesDensity 23 °C ISO 1183Reinforcement content ISO 1172Moisture absorption 70 °C/62 % r.F. ISO 1110ProcessingFlowability Flowspiral1 AKROProcessing shrinkage, flow ISO 294-4Processing shrinkage, transverse ISO 294-42

Product characterisationA characteristic property ofAKROMID® S (PA 6.10) is that it hasa renewable-resource content of upto 70 % and therefore fulfils the currentdefinition of a bioplastic¹. Theplant-based raw material used is sebacicacid, synthesized from castoroil which is obtained from the seedsof Ricinus communis, the castor oilplant.From a technical standpoint,AKROMID® S closes the gap betweenPA6/PA6.6 and PA12. It ischaracterized by significantly lowermoisture absorption compared toPA6 and PA6.6. At 23 °C and 50 %relative humidity, typical values forthese product types are 3 % and2.8 %, respectively. With a value ofapproximately 1.4 %, PA 6.10 absorbsjust half as much moistureand can therefore be used as an engineeringmaterial in applicationsrequiring a high dimensional accuracy.Moreover, it exhibits excellentcold impact resistance. Other outstandingcharacteristics include verygood chemical resistance due tothe structure of the polymer andhigh hydrolysis resistance, althoughit can be processed like all commonpolyamides.The materials from the PA 6.10 productfamily are further characterizedby exceptional dimensionalstability, good surface quality, goodsurface quality, abrasion resistance,wear behaviour, and an improvedcarbon footprint. This is due to thefact that the plant-based raw materialshave already removed CO₂from the environment during theirgrowth phase.The product portfolio currentlycomprises one non reinforced variantand several reinforced variantswith a glass-fibre content rangingfrom 15 % to 50 %.¹ = definition of Bioplastics according toProf. Dr. lng. H.-J. Endres,FH HannoverAKROMID® A (PA 6.6)Impact strength kJ/m2N (CH₂)₆ N C (CH₂)₄ CH H O O nAKROMID® S (PA 6.10)N (CH₂)₆ N C (CH₂)₈ CH H O O nAKROMID® S3 GF 30 1100806040200AKROMID® S3 GF 30 1 following ageing in ZnCl₂solution under flexural loadPA6-GF30 modific. IPA6-GF30 modific. IIPA6-GF30 modific. IIIPA6-GF30 modific. IVS3 GF 30 1 black (3259)PA6.6-GF30AKROMID® S3 GF 30 1 exhibits significantly better impactstrength compared to PA6/PA6.6-GF30Adipic acidSebacic acidImpact strength after 200 hours in ZnCl₂ solution4

A comparison of technical properties shows the outstanding differences between AKROMID® S andcomparable PA 6 compounds:Moisture absorption vs. exposure time – 500 h at 70 °C and 62 % rel. humidity32.5Moisture absorption %21.51B3 GF 30 blackB3 GF 50 black (2488)S3 GF 30 1 black (3259)S3 GF 50 1 black (3441)0.500 50 100 150 200 250 300 350 400 450 500 Exposure time hAKROMID® S absorbs approx. 50 % less moisture than a PA 6 GF 30or PA 6 GF 50Young’s modulus as a function of exposure time18,00015,00012,000B3 GF 30 blackB3 GF 50 black (2488)S3 GF 30 1 black (3259)S3 GF 50 1 black (3441)E-Modul MPA9,0006,000Ageing conditions:Temperature: 70 °CRel. humidity: 62 %Ageing period: 500 h3,00000 50 100 150 200 250 300 350 400 450 500Exposure time hFollowing moisture absorption, Young’s modulus in AKROMID® Sdecreases significantly less than in PA 6 GF 30 or PA 6 GF 505

Processing recommendationsAKROMID® S can be processed oncommercially available injectionmoulding machines with standardscrews according to the recommendationsof the machine manufacturer.Please refer to the table belowfor our recommended machine,mould and dryer settings (see diagram):θ F θ S θ D θ Z θ E θ TP holdP backτ< (-30) °CAKROMID® S3Feed section θ E 60 – 80 °CSector 1 – Sector 4 θ Z 220 – 300 °CNozzle θ D 240 – 295 °CMelt temperature θ S 260 – 310 °CMould surface θ F 70 – 100 °CDrying θ τ 80 °C, up to 4 hHolding pressure, spec. P hold 300 – 800 barBack pressure, spec. P back 50 – 150 barThe specified values are for reference values. For increasing filling contents the higher values should be used.For drying, we recommend using only dry air or a vacuum dryer. Processing moisture levels between 0.02 and 0.1% are recommended.The drying time of freshly-opened bags is up to 4h. It is recommended to use opened bags completely.Material processed from silo or boxes requires a minimum drying time of 4h.Flow lengthPA6-GF30 (reference)S3 GF 50 1 black (3441)S3 GF 30 1 black (3259)S3 GF 15 1 black (3316)Melt temperature: 270 °CMould temperature: 80 °CInjection pressure: 750 barCross section: 7*3.5 [mm²]Moisture content: 0.06 – 0.07 %S3 1 non reinf. black (3317)0 100 200 300 400 500 600 700 mm6