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玻璃纤维耐水性的测定
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GBT 33832-2017
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标准编号: GB/T 33832-2017 (GB/T33832-2017)
中文名称: 玻璃纤维耐水性的测定
英文名称: Determination of water resistance of glass fiber
行业: 国家标准 (推荐)
中标分类: Q36
国际标准分类: 59.100.10
字数估计: 7,770
发布日期: 2017-05-31
实施日期: 2018-04-01
引用标准: GB/T 1033.1; GB/T 6682; GB/T 7690.5; GB/T 11415; GB/T 31290
起草单位: 南京玻璃纤维研究设计院有限公司、巨石集团有限公司、国家玻璃纤维产品质量监督检验中心
归口单位: 全国玻璃纤维标准化技术委员会(SAC/TC 245)
提出机构: 中国建筑材料联合会
发布机构: 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会
范围: 本标准规定了两种测定玻璃纤维耐水性的方法:--方法A:质量损失法;--方法B:单丝拉伸断裂强力保留率法。本方法不适用于长度小于3 cm的短切丝束。本标准适用于丝束状的玻璃纤维耐水性的测定。
GB/T 33832-2017: 玻璃纤维耐水性的测定
GB/T 33832-2017 英文名称: Determination of water resistance of glass fiber
ICS 59.100.10
Q36
中华人民共和国国家标准
1 范围
本标准规定了两种测定玻璃纤维耐水性的方法:
---方法A:质量损失法;
---方法B:单丝拉伸断裂强力保留率法。本方法不适用于长度小于3cm的短切丝束。
本标准适用于丝束状的玻璃纤维耐水性的测定。
4 方法A:质量损失法
4.1 方法概要
称取一定质量的试样,置于流动的沸水中,保持微沸,一定时间后使用烧结过滤器抽滤、洗涤、干燥、
称量,计算质量损失率或单位表面积质量损失量。
4.2 仪器和材料
4.2.1 钢直尺,准确至0.5mm。
4.2.2 分析天平,准确至0.001g。
4.2.3 烧结过滤器,100mL,应符合GB/T 11415的要求,以玻璃材质,陶瓷滤片的为宜。其孔径应小
于玻璃纤维直径。初次使用的应按照使用说明书处理后使用。
4.2.4 恒温干燥箱,温度控制在105℃±2℃。
4.2.5 烧杯,1000mL,新购置的烧杯应先用蒸馏水在90℃水浴中浸析(老化)至少24h或在高压消毒锅中121℃(老化)1h。
4.2.6 pH计,分辨率0.1。
4.2.7 水,符合GB/T 6682二级水及以上的要求。
4.2.8 耐水性装置示意图(如图1所示)。
说明:
1---可调电炉(2kW);
2---烧杯(1000mL);
3---试样。
4.3 试验次数
应由同一操作者测定不少于2次,测定结果相差不超过重复性限,取算术平均值作为测试结果。
4.4 试验步骤
4.4.1 用钢直尺(4.2.1)测量纤维平均长度,准确至0.5mm,按照GB/T 1033.1和 GB/T 7690.5的规
定,测定玻璃纤维的密度和纤维平均直径。
4.4.2 用分析天平(4.2.2)称取备用样2g,准确至0.001g,置于烧杯中,加入600mL煮沸的水(pH值
6.0~7.0),用玻璃棒搅拌使纤维充分分散。置于可调电炉上,按图1所示,放置进出水管,加热微沸,保
持98℃±2℃,调节进出水的流量,不小于45mL/min,保持6h±10min,期间每隔1h用pH计测定
出水口溶液的pH值,保持溶液pH值不大于7.0。取下,用冰水浴快速冷却至室温。
4.4.3 用已恒重的烧结过滤器抽滤,将烧杯中的玻璃纤维完全转移至烧结过滤器中,再用热水洗涤纤维3次~4次。
4.4.4 将带有试样的烧结过滤器置于105℃±2℃的恒温干燥箱中干燥至恒重,移入干燥器中冷却至室温,称量。
4.5 结果计算
4.5.1 质量损失率
5 方法B:单丝拉伸断裂强力保留率法
5.1 方法概要
测定经流动沸水处理前后的玻璃纤维的单丝拉伸断裂强力,计算单丝拉伸断裂强力保留率。
5.2 仪器和材料
5.2.1 烧杯,1000mL,新购置的烧杯应先用蒸馏水在90℃水浴中浸析(老化)至少24h或在高压消毒
锅中121℃(老化)1h。
5.2.2 水,符合GB/T 6682二级水及以上的要求。
5.2.3 恒温干燥箱,温度控制在105℃±2℃。
5.2.4 拉伸试验机,符合GB/T 31290的规定。
5.3 试验步骤
5.3.1 取不少于100根纤维的备用样,放入烧杯(5.2.1)中,加入600mL煮沸的水,置于可调电炉上,按
4.4.2进行水解反应,取下,用冰水浴冷却。
5.3.2 用水清洗试样3次~4次,将试样置于105℃±2℃恒温干燥箱(5.2.3)中干燥,取下,干燥器中冷却。
5.3.3 按照GB/T 31290的规定测定经水解处理前后单丝拉伸断裂强力,分别获得不少于25个有效数据。
6 精密度
质量损失法的重复性限见表1。
7 试验报告
试验报告应至少包括如下内容:
a) 说明依据本标准及所用试验方法(A或B);
b) 识别被测样品的必要详情;
c) 试样数量;
d) 试验环境;
e) 试验结果;
f) 本标准中未提到的任何操作细节以及影响结果的任何操作;
g) 试验人员、日期;
h) 其他与试验相关的信息。
GB/T 33832-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.100.10
Q 36
Determination of Water
Resistance of Glass Fiber
ISSUED ON. MAY 31, 2017
IMPLEMENTED ON. APRIL 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Specimen Pre-Treatment ... 5
4 Method A. Mass Loss Method ... 5
5 Method B. Monofilament Tensile Breaking Strength Retention Rate
Method ... 8
6 Precision ... 9
7 Test Report ... 10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by China Building Material Federation.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Glass Fiber (SAC/TC 245).
Drafting organizations of this Standard. Nanjing Fiberglass Research & Design
Institute Co., Ltd., Jushi Group Co., Ltd., and China National Fiberglass Product
Quality Supervision & Testing Center.
Chief drafting staffs of this Standard. Zhou Qin, Li Rong, Liao Bing, Wang Yumei, Wang
Tao, Xi Bin, and Wang Ling.
Determination of Water
Resistance of Glass Fiber
Warning. this Standard is not intended to involve all safety issues related to the
use of the product. The users of this Standard are responsible for establishing
appropriate safety and healthy principles; and ensure whether it is applicable to
certain limits of the regulations before use.
1 Scope
This Standard specifies two methods for determination of water resistance of glass
fiber.
--- Method A. mass loss method;
--- Method B. monofilament tensile breaking strength retention rate method. This
method is not applicable to the chopped tows with length less than 3cm.
This Standard is applicable to the determination of water resistance of glass fiber in
tow shape.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 1033.1 Plastics – Methods for Determining the Density of Non-Cellular
Plastics – Part 1. Immersion Method, Liquid Pycnometer Method and Titration
Method
GB/T 6682 Water for Analytical Laboratory use – Specification and Test Methods
GB/T 7690.5 Reinforcements – Test Method for Yarns – Part 5. Determination of
Fiber Diameter for Glass Fiber
GB/T 11415 Laboratory Sintered (Fritted) Filters – Porosity, Grading, Classification
and Designation
GB/T 31290 Carbon Fiber – Determination of the Tensile properties of Single-
Filament Specimens
3 Specimen Pre-Treatment
3.1 For the continuous fiber tow, cut it into 250mm long section; take about 20g; one
end shall be bounded by the fine nylon; then place it into the dryer (diameter of 180mm)
containing 700mL acetone (analytically pure) or other soluble organic solvent of
impregnant; the fiber with free end shall be spread as much as possible; sealing and
soaking for at least 24h till the residual amount of impregnant is no greater than 0.1%.
the fiber sot that it becomes neat yarn bundle. Cut 100mm long section fiber from the
free end, place into 105°C±2°C constant temperature drying oven to dry to the constant
weight; take out; place into the dryer (with silicone) to cool off to the room temperature
for backup.
3.2 Take 10g of chopped tow; place into the dryer (diameter of 180mm) containing
700mL acetone (analytically pure) or other soluble organic solvent of impregnant;
sealing and soaking for at least 24h till the residual amount of impregnant is no greater
than 0.1%. Take out, use anhydrous ethanol (analytically pure) to wash for 3 ~ 4 times;
place into 105°C±2°C constant temperature drying oven to dry to the constant weight;
backup.
3.3 When it is required to determine the water resistance of fiber glass containing
impregnant, acetone or other organic solvent is unnecessary to be used to soak;
directly dry it for backup.
4 Method A. Mass Loss Method
4.1 Method summary
Weigh a certain mass of specimen; place into the flowing and boiling water; after a
certain period of time, use the sintered filter to filter, wash, dry, and weigh; calculate
the mass loss rate or mass loss amount per unit surface area.
4.2.1 Steel ruler, accurate to 0.5mm.
4.2.2 Analytical balance, accurate to 0.001g.
4.2.3 Sintered filter, 100mL, shall meet the requirements of GB/T 11415; the glass
material and ceramic filtering disk are suitable. Its aperture shall be less than the
diameter of glass fiber. It shall be treated according to the use instructions before the
5.2.3 Constant temperature drying oven, the temperature shall be controlled at
105°C±2°C.
5.2.4 Tensile tester shall conform to the provisions of GB/T 31290.
5.3 Test procedures
add 600mL of boiled water; place onto the adjustable electric furnace; perform the
hydrolyzed reaction as per 4.4.2; take off; use ice-water bath to cool off.
5.3.2 Use water to wash for 3 times ~ 4 times; place the specimen into 105°C±2°C
constant temperature drying oven (5.2.3) to dry; take off; place into dryer to cool off.
5.3.3 Measure the monofilament tensile breaking strength before and after the
hydrolyzed treatment as per the provisions of GB/T 31290; separately obtain no less
than 25 pieces of valid data.
5.4 Result calculation
It shall be calculated as per Formula (3).
δ – monofilament tensile strength retention rate, in %;
F2 – average monofilament tensile breaking strength of treated specimen, in cN;
F1 – average monofilament tensile breaking strength of backup specimen, in cN;
The result shall be retained 1 digit after the decimal point.
6 Precision
The repeatability limit of mass loss method can refer to Table 1.
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