GB/T 44440-2024保溫材料擴散法測定長期吸水率

ICS

83.100

CCS

G31

中華人民共和國國家標準

GB/T44440—2024/ISO20393:2007

保溫材料擴散法測定長期吸水率

Thermal-insulatingmaterials—Determinationoflong-term

waterabsorptionbydiffusion

（ISO20393:2007,IDT）

2024-08-23發(fā)布2025-03-01實施

國家市場監(jiān)督管理總局發(fā)布

國家標準化管理委員會

GB/T44440—2024/ISO20393:2007

目次

前言

·····································································································

Ⅲ

1

范圍

··································································································

1

2

規(guī)范性引用文件

······················································································

1

3

術(shù)語和定義

···························································································

1

4

原理

··································································································

1

5

儀器和材料

···························································································

1

6

試樣

··································································································

2

6.1

尺寸

······························································································

2

6.2

試樣數(shù)量

·························································································

2

6.3

制樣

······························································································

2

6.4

狀態(tài)調(diào)節(jié)

·························································································

2

7

試驗步驟

······························································································

3

8

結(jié)果表示

······························································································

3

9

精密度

································································································

3

10

試驗報告

····························································································

3

Ⅰ

GB/T44440—2024/ISO20393:2007

前言

本文件按照GB/T1.1—2020《標準化工作導(dǎo)則第1部分：標準化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)

定起草。

本文件等同采用ISO20393:2007《保溫材料擴散法測定長期吸水率》。

請注意本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機構(gòu)不承擔識別專利的責任。

本文件由中國輕工業(yè)聯(lián)合會提出。

本文件由全國塑料制品標準化技術(shù)委員會（SAC/TC48）歸口。

本文件起草單位：北京工商大學(xué)、江蘇江化聚氨酯產(chǎn)品質(zhì)量檢測有限公司、江蘇省化工研究所有限

公司、江蘇綠源新材料有限公司、江蘇中圣管道工程技術(shù)有限公司、輕工業(yè)塑料加工應(yīng)用研究所、江蘇

圣泰節(jié)能科技有限公司、南通覓睡方睡眠產(chǎn)業(yè)科技有限公司、河北君業(yè)科技股份有限公司、甘肅中輕輕

工產(chǎn)品質(zhì)量檢驗檢測有限責任公司、北京環(huán)橙科技有限公司。

本文件主要起草人：王蕾、羅琛、吳昊、白宇、張汝毅、倪新星、崔愛華、張萬偉、沈傳熙、

楊炳烽、于艷藏、連欽、宋俊龍。

Ⅲ

GB/T44440—2024/ISO20393:2007

保溫材料擴散法測定長期吸水率

1范圍

本文件規(guī)定了通過擴散法測定保溫材料長期吸水率的設(shè)備和方法。本文件描述了用于評估特定保溫

材料的吸水能力的方法：這些材料在使用中不僅長期承受兩面接近100%相對濕度，同時還存在兩面的

水蒸氣壓力梯度，例如坡面屋頂或無防護層的地坪保溫層。

本文件適用于某些保溫材料，但并不適用于所有類型的保溫材料。保溫材料的產(chǎn)品標準通常應(yīng)說明

本文件是否適用于特定產(chǎn)品。

注：對于地坪保溫層，當有更多的數(shù)據(jù)可用時，可使用較低的溫度代替本文件中目前規(guī)定的50℃的測試溫度。

2規(guī)范性引用文件

下列文件中的內(nèi)容通過文中的規(guī)范性引用而構(gòu)成本文件必不可少的條款。其中，注日期的引用文

件，僅該日期對應(yīng)的版本適用于本文件；不注日期的引用文件，其最新版本（包括所有的修改單）適用

于本文件。

ISO472塑料詞匯（Plastics—Vocabulary）

注：GB/T2035-2008塑料術(shù)語及其定義（ISO472:1999,IDT）

ISO1923泡沫塑料與橡膠線性尺寸的測定（Cellularplasticsandrubbers—Determinationof

lineardimensions）

注：GB/T6342—1996泡沫塑料與橡膠線性尺寸的測定（ISO1923:1981）

3術(shù)語和定義

ISO472界定的術(shù)語和定義適用于本文件。

4原理

擴散法測定長期吸水率是在28d時間內(nèi)，讓試樣在其上下表面之間承受特定的水蒸氣壓差和溫度梯

度，然后通過測定試樣的質(zhì)量增量來確定的。

5儀器和材料

5.1天平：精度為0.1g。

5.2耐腐蝕容器：帶有能支撐試樣的框架。

5.3加熱裝置：配有能將水溫控制在（5