冷收縮套管

冷縮管常規性能檢測介紹

冷縮管常規性能檢測介紹

根據通訊冷縮管的常規使用環境,針對矽橡膠、EPDM冷縮管進行相關性能檢測,以確保通訊冷縮管能夠有效保護被套物正常使用。

按檢測項目分類主要有以下六種:

一、機械性能檢測

1.拉伸強度(tensile strength)

是指材料產生最大均勻塑性變形的應力;在拉伸試驗中,材料或產品試樣,單位面積的樣品拉伸至斷裂為止所受的最大拉伸應力即為拉伸強度;單位MPa

2.斷裂伸長率(percentage of breaking elongation

是指材料受外力作用至拉斷時,拉伸前後的差值與拉伸前長度的比值稱斷裂伸長率,用百分率(%)表示。

3.撕裂強度(無割口直角形撕裂強度)(unnick angle tear strength

用沿試樣長度方向的外力作用於規定的直角形試樣上,將試樣撕裂所需的最大力除以試樣厚度,得到撕裂強度;單位為N/mm

4.100%定伸強度(100%stress at a given elongation 

將試樣的試驗長度部分拉伸到100%時所需要的強度應力;單位MPa

5.200%定伸強度(200%stress at a given elongation 

將試樣的試驗長度部分拉伸到200%時所需要的強度應力;單位MPa

二、電氣性能檢測

1.擊穿電壓強度(electrical breakdown voltage

試樣的擊穿電壓與其厚度之比,稱擊穿電壓強度;單位為kV/mm

通常採用標準有《GB/T 1695-2005 硫化橡膠工頻擊穿強度耐電壓測定方法》《ASTM D149-2009介電擊穿電壓試驗方法》《IEC 60243-1-2013 絕緣材料電氣強度.試驗方法.1部分:工業頻率試驗》

2.擊穿電壓(breakdown voltage

(在連續升壓試驗中)在規定的試驗條件下,試樣發生擊穿時的電壓;單位為KV

通常採用標準有《GB/T 1695-2005 硫化橡膠工頻擊穿強度耐電壓測定方法》《ASTM D149-2009介電擊穿電壓試驗方法》《IEC 60243-1-2013 絕緣材料電氣強度.試驗方法.1部分:工業頻率試驗》

三、老化性能檢測

1.臭氧老化(ozone aging

主要考察材料耐臭氧性能,通過環境類比及加速實驗評定試樣對臭氧的耐受性,從而判斷產品的耐臭氧能力;

通常採用標準有《GB/T 13642-2015 硫化橡膠或熱塑性橡膠 耐臭氧龜裂動態拉伸試驗》

2.紫外光老化(ultraviolet aging

主要考察材料紫外光性能,通過環境類比及加速實驗評定試樣對紫外光照射的耐受性,從而判斷產品是否能長期在戶外使用或其他高紫外光環境下使用;

通常採用標準有《GB/T 18950-2003橡膠和塑膠軟管 靜態下耐紫外線性能測定》

四、防黴菌檢測

主要測試黴菌種類:黑麯黴 ATCC 6275 、土麯黴 ATCC 10690、球毛殼黴 ATCC 6205、樹脂子囊菌 DSM 1203、宛氏擬青黴 ATCC 18502、繩狀青黴 ATCC 36839、光孢短柄帚黴 ATCC 36840、綠色木黴 ATCC 9645

通常採用標準有GB/T 2423.16-2008IEC 60068-2-10:2005)電工電子產品環境實驗 2部分:試驗方法-試驗J和導則:長黴(試驗方法1

五、環境使用性能檢測

1.高溫密封防護試驗

測試條件及要求:冷縮管安裝線上纜上,70/95%1h後,完全浸在水中3min,無裂紋和可見變化樣品內部無水滲入;

2.耐低溫測試

測試條件及要求:-4096h,無裂紋和破裂;

3.耐高溫測試

測試條件及要求:7016h,無裂紋和破裂;

4.高低溫測試

測試條件及要求:-403h/703h5個迴圈,顏色無變化,表面未發脆、無裂紋。

六、防塵防水檢測

1.IP 6X

主要測試標準有IEC60529,置於灰塵室中,使用滑石粉進行懸浮測試,內部未發現灰塵堆積;

2.IP X7

主要測試標準有IEC60529,浸泡水槽,水面距離樣品底部1米,時間為30min,樣品內部無水滲入。


Cold shrink tube routine performance test introduction

According to the normal use environment of the communication cold-shrinkable tube, relevant performance tests are carried out for the rubber and EPDM cold-shrinkable tubes to ensure that the communication cold-shrinkable tube can effectively protect the normal use of the quilt.

There are mainly six types according to the classification of test items:

First, mechanical performance testing

1. tensile strength

Refers to the stress of the material that produces the most uniform plastic deformation; in the tensile test, the maximum tensile stress of the material or product sample, the sample per unit area stretched until the fracture is the tensile strength; unit MPa.

2. elongation of breaking elongation

It refers to the ratio of the difference between the difference before and after stretching and the length before stretching when the material is subjected to external force to break. It is expressed as percentage (%).

3. tear strength (unnick angle tear strength)

Applying an external force along the length of the specimen to the specified rectangular specimen, dividing the maximum force required to tear the specimen by the thickness of the specimen to obtain the tear strength; the unit is N/mm;

4.100% strength at a given elongation

The strength stress required to stretch the test length portion of the specimen to 100%; unit MPa.

5.200% strength at a given elongation

The strength stress required to stretch the test length portion of the specimen to 200%; unit MPa.

Second, electrical performance testing

1. electrical breakdown voltage

The ratio of the breakdown voltage of the sample to its thickness is called the breakdown voltage strength; the unit is kV/mm.

Generally used the standard "GB/T 1695-2005 vulcanized rubber power frequency breakdown strength withstand voltage measurement method" "ASTM D149-2009 dielectric breakdown voltage test method" "IEC 60243-1-2013 insulation material electrical strength. Test method. Part 1: Industrial Frequency Test

2. breakdown voltage

(In the continuous boost test) The voltage at which the sample breaks under the specified test conditions; the unit is KV.

Generally used the standard "GB/T 1695-2005 vulcanized rubber power frequency breakdown strength withstand voltage measurement method" "ASTM D149-2009 dielectric breakdown voltage test method" "IEC 60243-1-2013 insulation material electrical strength. Test method. Part 1: Industrial Frequency Test

Third, aging performance testing

1. Ozone aging

It mainly investigates the ozone resistance of materials, and evaluates the resistance of samples to ozone through environmental analogy and accelerated experiments to determine the ozone resistance of products.

Generally used the standard "GB/T 13642-2015 vulcanized rubber or thermoplastic rubber ozone crack resistance dynamic tensile test"

2. Ultraviolet aging

It mainly investigates the ultraviolet light properties of materials, and evaluates the resistance of samples to ultraviolet light irradiation through environmental analogy and accelerated experiments to determine whether the products can be used outdoors or in other high-UV environments for a long time;

Usually the standard is "GB/T 18950-2003 rubber and plastic hose static UV resistance test"

Third, aging performance testing

1. Ozone aging

It mainly investigates the ozone resistance of materials, and evaluates the resistance of samples to ozone through environmental analogy and accelerated experiments to determine the ozone resistance of products.

Generally used the standard "GB/T 13642-2015 vulcanized rubber or thermoplastic rubber ozone crack resistance dynamic tensile test"

2. Ultraviolet aging

It mainly investigates the ultraviolet light properties of materials, and evaluates the resistance of samples to ultraviolet light irradiation through environmental analogy and accelerated experiments to determine whether the products can be used outdoors or in other high-UV environments for a long time;

Usually the standard is "GB/T 18950-2003 rubber and plastic hose static UV resistance test"

Fourth, anti-fungal detection

The main tested mold species: Aspergillus niger ATCC 6275, Aspergillus terreus ATCC 10690, Chaetomium sphaeroides ATCC 6205, Ascomycete Asparagus DSM 1203, Paecilomyces variabilis ATCC 18502, Penicillium funiculosum ATCC 36839, Aspergillus oryzae ATCC 36840, Trichoderma viride ATCC 9645.

Commonly used standard GB/T 2423.16-2008 (IEC 60068-2-10:2005) environmental testing of electrical and electronic products Part 2: Test methods - Test J and guide: Long mold (test method 1)

V. Environmental performance testing

1. High temperature sealing protection test

Test conditions and requirements: cold shrink tube installation on the cable, 70 ° C / 95%, after 1 h, completely immersed in water for 3 min, no cracks and visible changes inside the sample without water infiltration;

2. Low temperature resistance test

Test conditions and requirements: -40 ° C, 96 h, no cracks and cracks;

3. High temperature test

Test conditions and requirements: 70 ° C, 16 h, no cracks and cracks;

4. High and low temperature test

Test conditions and requirements: -40 ° C, 3 h / 70 ° C, 3 h, 5 loops, no change in color, the surface is not brittle, no cracks.

Sixth, dustproof and waterproof detection

1.IP 6X

The main test standard is IEC60529, placed in a dust chamber, using talcum powder for suspension test, no dust accumulation inside;

2.IP X7

The main test standard is IEC60529, soaking the water tank, the water surface is 1 meter from the bottom of the sample, the time is 30min, and there is no water infiltration inside the sample.