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                              【尼龍制品】的調濕處理

                              • 文章出處:http://www.s-arthair.com/
                              • 責任編輯:格萊德
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                              • 發表時間:2021-7-25 18:28:26

                                【尼龍制品】的調濕處理
                                1、吸濕性Moistureabsorption
                                剛頂出的注塑制品幾乎不含水分。這點對于塑件以后的應用很重要,因為FRIANYL?-尼龍只在水分含量為大約1.5–2.5**時,各項機械性能達到要求。因此,注塑制品都需要調濕。
                                Injectionmouldingsthatareejectedoutofthemouldhavealmostnomoisturecontent.Thisisveryimportanttorecognizethisforfutureapplicationsforthemoulding.FRIANYL?-polyamidesonly
                                attaintheiroptimummechanicalpropertiesaftermoistureequilibriumhasbeenreachedatabout1.5-2.5**.Forthisreasontheinjectionmouldingsshouldalwaysbeconditioned.
                                吸濕性取決于結晶度。非結晶區吸濕更快,這就是為什么強調調整工藝參數,務必使結晶均勻的原因。
                                Moistureabsorptiondependsonthecrystallinity.Amorphousareasabsorbmoisturefaster.That'swhyoneshouldaimforanevencrystallinity,whichisachievedbytheprocessingparameters.
                                吸濕速度由FRIANYL?-牌號,環境濕度,以及塑件的壁厚共同決定。
                                TherateofmoistureabsorptionisdependentontheFRIANYL?-types,theenvironmentalconditions,andthewallthicknessofthemouldings.
                                請參見后面的調濕表。
                                Seeattachedconditioningtable
                                尼龍制品http://www.jxxggs.com/應該注意到,塑件的水分含量每增加1**,塑件的體積會增加0.05-0.2**。對于要求尺寸精確的塑件,這點特別要注意。
                                Ithastobenoticed,thatwitha1**increaseinwatercontentinthemouldingit'svolumeincreasesbyabout0.05-0.2**.Thisisofspecialsignificanceformouldingswithtightdimensionaltolerances.
                                2、飽和吸水率Waterabsorption-saturated
                                FRIANYL?-尼龍的飽和吸水率取決于具體牌號,一般在7-9**之間。壁厚和水溫決定吸水速度。
                                ThesaturatedwaterabsorptionofFRIANYL?-polyamidesdependsmainlyonthematerialtypeandrangesasaruleisbetween7-9**.Thespeedwithwhichthishappensdepends,tooonthewallthicknessandthewatertemperature.
                                參見下述調濕表。
                                Seeattachedconditioningtable.
                                NILIT(屹立)FRIANYL?尼龍的調濕表
                                ConditioningtableforFRIANYL?Polyamides
                               ?、買SO–1110規定的NK23/50條件下的標準調濕條件。
                                備注:在壁厚一欄,沒加下劃線的為小時數,加了下劃線的為天數。僅供參考。
                                AccordingtoISO-1110fortheconditioningofstandardtestbodiestothestandardmoisturecontentinNK23/50Conditioningtimeinhours/daysfortheadjustmentofthewatercontentequilibriuminnormalhumidairwhenstoredforflatparts(plates)inFRIANYL?.
                                水滲透的過程符合物理學上的吸水規律,這就是說,靠自然氣候本身調濕是天然和**經濟的辦法,但是在室溫和通常氣候下,吸濕過程是非常緩慢的。
                                Thewaterdeliveryprocessissubjecttothesamephysicalrulesasthewaterabsorption.Thismeansthatforpracticalpurposesclimate-andweathervariationscanbeneglectedbecausewaterabsorptionand-deliverydoatleastatroomtemperatureandnormalclimatehappenveryslowly.
                                和上述1一樣,吸水時也要考慮相應的體積變化。
                                Increaseofvolumehastobetakenintoconsiderationseepoint1alsoconcerningthewaterabsorption.
                                3、測試水分含量Determinationofthemoistureandwatercontent
                                對塑件制造商來說,簡單稱量調濕前后尼龍塑件重量的增加來測算水分含量,就已經夠了。要更精確測量的話,可以使用紅外干燥法,和實驗室常用的Karl-Fischer-Titration(KT-Titration)方法。
                                ForthemanufactureritissufficienttodeterminethemoisturecontentinPApartsbyestablishingtheincreaseinweightsimplybyweighingthepartsbeforeandafterconditioning.FurthermoreprecisemeasurementmethodsareinfrareddryingandKarl-Fischer-Titration(KT-Titration),whichistheusualmethodinlabs.
                                4、調濕Conditioning
                                調濕的目的是在注塑廠賦予塑件日后使用所需要的性能。
                                Thepurposeofconditioningistoimpartinthemouldingwhilststillinthemouldingcompanythepropertiesthatthepartwillrequirelater.
                                FRIANYL?-尼龍在水分含量1.5–2.5**時達到其特定的性能。因為調濕過程,隨不同工藝,要花費時間和成本??蛻粜枰槍μ囟☉?,在調濕之前要考慮是不是有必要。
                                FRIANYL?-polyamidesattaintheirspecificpropertyvalueswithamoisturecontentof1.5-2.5**.Becausetheconditioningprocessis,dependinguponthechosenprocedure,expensiveandtimeconsuming,oneshouldfirstconsiderwhetheraparticularcasereallyrequiresconditioning.
                                如果決定要調濕,以下有幾個不同的選擇,可根據情況參考:
                                Shouldonedecideinfavourofconditioningthenthereareseveraloptionsavailablewhichcanbeselectedfordifferentreasons:
                                塑件封入PE包裝袋,添加2-5**的水分PackinginPE-bagswiththeadditionof2-5**Water
                                確定室溫下和通常環境濕度下的儲存時間
                                Definedstoragetimeatroomtemperatureandnormalenvironmentmoisture
                                在注塑好之后,直接置入溫水中Storageinwarmwaterdirectlyattheinjectionmouldingmachine
                                使用市售的專門調濕設備Withspecialconditioningdevices,whichareavailableonthemarket
                                建造調濕室,內設濕熱蒸汽Purposebuiltconditioningchamberswithsteamortropicalclimate
                                塑件調濕的一個先決條件是要明確需要的水分含量,然后確定調濕時間。Aprerequisiteforcontrolledconditioningofmouldingsisthesupervisionofthemoisturecontentandestablishingtheconditioningtime.