This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3903.7-2005 Footwear - Ageing conditioning, and the following main technical changes have been made with respect to GB/T 3903.7-2005:
——The normative references are modified (see Clause 2, Clause 2 of Edition 2005);
——The terms and definitions are modified (see Clause 3, Clause 3 of Edition 2005);
——The test report is modified (see Clause 8, Clause 8 of Edition 2005);
——The word "heat ageing" is changed to "dry heat ageing" in the text; and the word "humidified ageing" is changed to "damp-heat ageing".
This part, by means of translation, is identical to ISO 20870: 2017 Footwear - Ageing conditioning.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 22049-2019 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear (ISO 18454: 2018, IDT);
——GB/T 22050-2008 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces (ISO 17709: 2004, IDT).
The following editorial changes have been made in this part:
——To be consistent with the existing standard series in China, the standard is renamed as Footwear - Test methods for whole shoe - Ageing conditioning.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by China National Light Industry Council.
This part is under the jurisdiction of SAC/TC 305 National Technical Committee on Footwear of Standardization Administration of China.
The previous edition replaced by this part is as follows:
——GB/T 3903.7-2005.
Footwear - Test methods for whole shoe - Ageing conditioning
1 Scope
This part of GB/T 3903 specifies test methods which are intended to imitate the effects of naturally occurring reactions. The physical properties of interest are measured before and after the application of the ageing conditioning. The effect of the ageing conditioning on any of the physical properties of the material may be determined.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 17709 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces
ISO 18454 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17709 and ISO 18454 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——ISO Online browsing platform: available at https: //www.iso.org/obp
——IEC Online browsing platform: http: //www.electropedia.org/
4 Test apparatus and materials
4.1 Dry heat ageing test
4.1.1 Oven, with forced circulation system, capable of maintaining the temperature within (70 ± 2)℃.
4.2 Damp heat ageing test
4.2.1 Ageing apparatus, of such a size that the total volume of test pieces does not exceed 10% of the free air space, and such that the test pieces are free to stretch, and exposed to the ageing atmosphere on all sides and not exposed to light.
4.2.2 Glass vessel, with a suitable plug for maintaining the test pieces at a relative humidity of 100%, and a water-bath or oven for heating the vessel, capable of maintaining the temperature at (70±2)℃.
5 Sampling and conditioning
The number, size and shape of the test pieces shall be determined according to the nature of the test, and sampling shall be done in accordance with ISO 17709 before the ageing test, with the dimensions defined in the particular test.
6 Test procedure
After conditioning, the physical properties shall be determined, and the test pieces shall be brought rapidly to the ageing condition. The duration of dry heat ageing and of damp heat ageing is (168±2) h.
At the end of the ageing treatment, condition for 24 h according to ISO 18454 before testing.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus and materials
5 Sampling and conditioning
6 Test procedure
7 Expression of results
8 Test report
ICS 61.060
Y 78
中華人民共和國國家標(biāo)準(zhǔn)
GB/T 3903.7—2019/ISO 20870：2017
代替GB/T 3903.7—2005
鞋類 整鞋試驗方法 老化處理
Footwear—Test methods for whole shoe—Ageing conditioning
(ISO 20870：2017，F(xiàn)ootwear—Ageing conditioning，IDT)
2019—08—30發(fā)布 2020—03—01實施
國家市場監(jiān)督管理總局
中國國家標(biāo)準(zhǔn)化管理委員會
發(fā)布
前言
本部分按照GB/T 1.1—2009給出的規(guī)則起草。
本部分代替GB/T 3903.7—2005《鞋類通用試驗方法 老化處理》，與GB/T 3903.7—2005相比，主要技術(shù)變化如下：
——修改了規(guī)范性引用文件(見第2章，2005年版的第2章)；
——修改了術(shù)語和定義(見第3章，2005年版的第3章)；
——修改了試驗報告(見第8章，2005年版的第8章)；
——全文將“加熱老化”修改為“干熱老化”；“加濕老化”修改為“濕熱老化”。
本部分使用翻譯法等同采用ISO 20870：2017《鞋類 老化處理》。
與本部分中規(guī)范性引用的國際文件有一致性對應(yīng)關(guān)系的我國文件如下：
——GB/T 22049—2019 鞋類 鞋類和鞋類部件環(huán)境調(diào)節(jié)及試驗用標(biāo)準(zhǔn)環(huán)境(ISO 18454：2018，IDT)；
——GB/T 22050—2008鞋類 樣品和試樣的取樣位置、準(zhǔn)備及環(huán)境調(diào)節(jié)時間(ISO 17709：2004，IDT)。
本部分做了下列編輯性修改：
——為與現(xiàn)有標(biāo)準(zhǔn)系列一致，將標(biāo)準(zhǔn)名稱修改為《鞋類 整鞋試驗方法 老化處理》。
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(dān)識別這些專利的責(zé)任。
本部分由中國輕工業(yè)聯(lián)合會提出。
本部分由全國制鞋標(biāo)準(zhǔn)化技術(shù)委員會(SAC/TC 305)歸口。
本部分所代替標(biāo)準(zhǔn)的歷次版本發(fā)布情況為：
——GB/T 3903.7—2005。
鞋類 整鞋試驗方法 老化處理
1 范圍
GB/T 3903的本部分規(guī)定了模擬自然發(fā)生反應(yīng)效果的試驗方法。老化處理前后分別測定試樣的物理性能。老化處理對試樣任何物理性能的影響都可能會測定出來。
2規(guī)范性引用文件
下列文件對于本文件的應(yīng)用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是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。
ISO 17709 鞋類 樣品和試樣的取樣位置、準(zhǔn)備及環(huán)境調(diào)節(jié)時間(Footwear—Sampling location，preparation and duration of conditioning of samples and test pieces)
ISO 18454 鞋類 鞋類和鞋類部件環(huán)境調(diào)節(jié)及試驗用標(biāo)準(zhǔn)環(huán)境(Footwear—Standard atmospheres for conditioning and testing of footwear and components for footwear)
3術(shù)語和定義
ISO 17709和ISO 18454界定的術(shù)語和定義適用于本文件。
ISO和IEC標(biāo)準(zhǔn)化術(shù)語數(shù)據(jù)庫地址如下：
——ISO在線瀏覽：https：//www.iso.org/obp
——IEC在線瀏覽：http：//www.electropedia.org/
4試驗設(shè)備和材料
4.1干熱老化試驗
4.1.1 烘箱，有強制循環(huán)系統(tǒng)，能將溫度保持在(70±2)℃范圍內(nèi)。
4.2濕熱老化試驗
4.2.1 老化試驗設(shè)備，其尺寸應(yīng)保證試樣的總體積不超過自由空氣空間的10％。試樣完全自由伸張，試樣所有部分均處于老化空氣中，避光放置。
4.2.2玻璃容器，有合適塞子的玻璃容器放置試樣，能使待測試樣在相對濕度為100％的空氣中，用水浴鍋或者烘箱來加熱此玻璃容器，保持其溫度在(70±2)℃。
5取樣和環(huán)境調(diào)節(jié)
試樣數(shù)量、尺寸和形狀的選取根據(jù)試驗的性質(zhì)來決定，在老化試驗前按ISO 17709規(guī)定的特定試驗的試樣尺寸進行取樣。
6試驗步驟
在環(huán)境調(diào)節(jié)后進行物理性能的測定，然后試樣應(yīng)立即放置到老化環(huán)境中。干熱老化過程和濕熱老化過程的時間均為(168±2)h。
老化處理后、試驗前按ISO 18454對試樣進行24 h的調(diào)節(jié)。
7試驗結(jié)果表達
試樣性能的變化率X以百分數(shù)(％)表示，按式(1)計算：
(1)
式中：
——老化后的平均性能值；
——老化前的平均性能值。
8試驗報告
試驗報告應(yīng)包括以下內(nèi)容：
a)本部分編號；
b)詳細描述試樣性質(zhì)；
c) 本試驗方法的參考；
d)試驗結(jié)果，按第7章表示；
e) 說明是干熱老化試驗還是濕熱老化試驗；
f) 在老化前后測定其單獨性能，在適當(dāng)?shù)那闆r下，用百分比表示性能的變化；
g)試驗日期；
h)試驗過程中觀察到的標(biāo)準(zhǔn)環(huán)境情況。
