BS EN ISO 10366-2-1995 塑料.甲基丙烯酸甲酯/丙烯腈/丁二烯/苯乙烯模塑和挤塑材料.试样制备和特性测定
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【英文标准名称】:Plastics-Methylmethacrylate/acrylonitrile/butadiene/styrene(MABS)mouldingandextrusionmaterials-Preparationoftestspecimensanddeterminationofproperties
【原文标准名称】:塑料.甲基丙烯酸甲酯/丙烯腈/丁二烯/苯乙烯模塑和挤塑材料.试样制备和特性测定
【标准号】:BSENISO10366-2-1995
【标准状态】:作废
【国别】:英国
【发布日期】:1995-05-15
【实施或试行日期】:1995-05-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:机械试验;塑料;电气试验;热塑性聚合物;试验条件;热试验;试样;含量测定;喷射铸造法;高聚物;物理性能测量;丙烯腈-丁二烯-苯乙烯共聚物;压缩模塑法;流变性能;模塑材料;异丁烯酸甲酯;试样制备;挤压;压力荷载
【英文主题词】:
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:16P;A4
【正文语种】:英语
基本信息
| 标准名称： | 冷冲模四导柱钢模架上模座 |
| 中标分类： |
|
| 发布日期： | 1990-09-18 |
| 实施日期： | 1990-12-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类：
【英文标准名称】:StandardGuideforSelectionofTime-TemperatureIndicators
【原文标准名称】:时间.温度指示器的选择的标准指南
【标准号】:ASTMF1416-1996(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F02.15
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:selection;time-temperature;indicators;Effectiveaveragetemperature;Shelflife;Temperaturetests;Time-temperatureindicators(TTI)
【摘要】:Expirationdatesareoftenmarkedonthepackagesofperishableproductstoindicatethepresumedendoftheirshelflives.Sincetheshelflivesofmostperishableproductsaretemperaturedependent,theexpirationdateisdeterminedbyassumingtheproductwillbekeptwithinaprescribedtemperaturerangeforitsentirelife.Aproblemwiththismethodisthatthereisnowaytodetermineiftheshelflifeofaproducthasbeenshortenedbyexposuretoahighertemperature.Atime-temperatureindicatorsolvesthisproblemwhenattachedtothepackagebecauseitreachesitsendpointsoonerwhenexposedtoahighertemperature.Inordertodirectlyindicatetheendoftheshelflife,thetime-temperatureindicatorcharacteristicsshouldbematchedascloselyaspossibletothequalitycharacteristicsoftheproduct.Whenkeptatthestandardstoragetemperaturefortheproduct,theindicatorshouldreachitsendpointatthesametimeastheproduct''sshelflife.Inaddition,todeterminetheaccuracyofthematchatothertemperatures,thechangeofshelflifewithtemperatureshouldbeknownforboththeproductandtheindicator.TheArrheniusrelationshipisacommonandconvenientmethodofdescribingthechangeofshelflifewithtemperature.Incaseswhereitisnotapplicable,individualtime-temperaturepointsfortheproductmaybeestablishedandanapproximatecorrelationwiththeTTIobtained.Whenattachedtothepackageofaperishableproduct,atime-temperatureindicatormaysupplement,orinsomecasesreplace,theexpirationdatecode.TheadditionofaTTIprovidesagreaterlevelofconfidencethattheperishableproductiswithinitsshelflifebecauseitrespondstotheactualtemperatureconditionstowhichtheproducthasbeenexposed.Inthecaseofminimallyprocessedrefrigeratedfoods,therapidgrowthofpathogenicbacteriaatelevatedtemperaturesmayposeaserioushealthhazardevenbeforethedeteriorationofthequalityoftheproductbecomesapparenttotheconsumer.Inthiscase,anexpirationdatemaybeusedforstorageatthestandardtemperature,whileathreshold-temperatureTTIisusedtoindicatetheexposuretotemperaturesatwhichgrowthbecomesmeasurable.Itisalsopossibletouseadual-functionTTI,inwhichcasethestandardTTIwouldindicatetheshelflifeatthecorrectstoragetemperaturewhilethethreshold-temperaturepartwouldindicatetheexposuretohighertemperatures.1.1Thisguidecoversinformationontheselectionofcommerciallyavailabletime-temperatureindicators(TTIs)fornoninvasiveexternalpackageuseonperishableproducts,suchasfoodandpharmaceuticals.Whenattachedtothepackageofaperishableproduct,TTIsareusedtomeasurethecombinedtimeandtemperaturehistoryoftheproductinordertopredicttheremainingshelflifeoftheproductortosignaltheendofitsusableshelflife.Itistheresponsibilityoftheprocessoroftheperishableproducttodeterminetheshelflifeofaproductattheappropriatetemperaturesandtoconsultwiththeindicatormanufacturertoselecttheavailableindicatorwhichmostcloselymatchesthequalityoftheproductasafunctionoftimeandtemperature.Note18212;Besidestime-temperatureindicator,TTIisalsoanabbreviationfortime-temperaturemonitorandtime-temperatureintegrator.1.2Time-temperatureindicatorsmaybeintegratedintoaHazardAnalysisandCriticalControlPoint(HACCP)plan.Appropriateinstructionsshouldbeestablishedforhandlingproductsforwhicheithertheindicatorhassignaledtheendofusableshelflifeortheshelflifeoftheproductatitsnormalstoragetemperaturehasbeenreached.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,......
【中国标准分类号】:N11
【国际标准分类号】:17_080
【页数】:4P.;A4
【正文语种】:英语
