Semi-finished products Plastic granules Special compounds

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Rating of ZEDEX ® polymers against thechemicals used in the sterilizationThe family ZX-530 has got the highest chemicalresistance of all the ZEDEX ® plastics.PEEK is also inferior to ZX-530. When the ZX-530comes in contact with few chemicals a colour changeoccurs, which, however, do not affect the properties.The family ZX-324 is chemicals resistant to allthe chemicals used during a sterilization and anantiseptic process.The ZX-410 and ZX-100, after several sterilizationprocedures, have got a properties variation.1 Marginally infl uenced by2 Optical variations3 Properties variationsX Not suitableZX-100KZX-100EL55/63ZX-100MTWater vapour 140°C3X3Hydrogen peroxide2X2Ozone1X1Paracetic acid2X2Formaldehyde2X2SecurityThe quantity of sterilization cycles that a materialis able to stand, depends on several factors as temperature,chemical agents, sterilization equipmentand processing parameters. Therefore, the materialsshould be tested following specific operational andsterilization terms.ImprovementsThanks to our extensive testing facilities, we offeryou the opportunity to change the components´properties considering your specific application. If astandard plastics do not have the required properties,we can produce special <strong>compounds</strong> according to theexpected properties.SupportThe instructions and information in this documentpermit the comparison of our materials and thus tochoose the appropriated one. On request, we will giveyou more specific information, or we will support youin your material selection.ZX-32411111ZX-324V1T21112ZX-324V2T11111ZX-324V11T11111ZX-324VMT11111ZX-41022123ZX-410V7T22123ZX-53012111ZX-530CD312111ZX-530EL312111ZX-530KF1512111ZX-55011111ZX-550PV11111ZX-750V5T23111ZX-750V5KF23111Table 8: relative resistance to the chemical sterilizations80 ZEDEX ® basic types ZEDEX ® families Post heattreatmentMachiningShippingoverviewSterilizationChemicalresistance
Chemical resistanceIntroductionThe term “chemical resistance” is normally used,although an absolute resistance is never given. Thechemical resistance describes how the resistance propertiesof polymers interact with the chemical agents(e.g. air, gas, water, grease). This means that thesubstances influence the polymers, but at the sametime also the polymers influence the chemical agents.For example, some polymers affect on the greaseconsistency, and thus the grease influence negativelythe polymers.Influence on plasticsEvery chemical agent has got a different behaviourfor each polymers category. Its behaviour could cause,either chemical interactions or physical interactionswith the polymers.Chemical interaction agents react with the primaryvalence bonds and modify the polymers´ propertiesirreversibly. In this case the chain breaks, thus itshortens and induces an embrittlement of the polymers.The polymers response with softening, swellingtill its dissolution in the agent. Even a small chemicalattack could lead to strong properties changes.Physical interaction agents do not react with thepolymers, but they reduce their physical bondsforces. The agent penetrates in the empty areas ofthe chains, spreads them and increases the spacebetween the chains, thus it causes a reduction of thesecondary valence bonds forces. This reaction takesplace till the polymers reach a state of equilibrium.The polymers response with softening and swelling.If the agent is extracted from the polymers, they willnearly restore the initial properties.Physical interaction agents influence depend on thepolyamides conditioning. The polyamides, with anabsorption of water (agent), pass from a hard andbrittle condition to an elastic and tough condition.The influence intensity of the chemical agents dependson the following parameters:TemperatureA temperature increment leads to a speed incrementof the Brownian motion. The processes go every10°C temperature increment, from 3 up to 4 timesfaster. If the temperature rises above the glasstransition temperature, a sharp reduction of theresistance occurs.ZEDEX ® basic types ZEDEX ® families Post heattreatmentMachiningShippingoverviewSterilizationChemicalresistance81
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ZEDEX ®Tribological Polymer Soluti
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Stamping (Hot forming) . . . . . .
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Thermal limitation usage of ZEDEX
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Comparison of the relative characte
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SubstitutionexamplesWhich material
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SubstitutionexamplesWhich material
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Application with chemicals ZX-530 f
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Low friction ZX-550 familyBasic typ
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Long-term up to 300 °C ZX-750 fami
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Comparison table of the ZEDEX ® ma
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Post heat treatmentThe plastic is s
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Degree of crystallinitySemi-crystal
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Machining guidelineZX-100KZX-100EL6
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SawingThe band saw cut speed should
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Page 38 and 39: Size list of sheetsMaterialThicknes
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Page 79: High energy radiationThe radiation
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Semi-finished products Plastic granules Special compounds

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