一，產(chǎn)品簡(jiǎn)介：
密封材料表干時(shí)間測(cè)定器是*檢測(cè)儀器，用于在規(guī)定條件下，將密封膠試樣填充到規(guī)定形狀的模框中，用在試樣放置薄膜或指觸的方法測(cè)量其干燥程度。報(bào)告薄膜或手指上無(wú)粘附試樣所需的時(shí)間。符合GB 16776-2005 《建筑用硅酮密封膠》、GB/T 13477.5-2002《建筑密封材料試驗(yàn)方法 表干時(shí)間的測(cè)定》標(biāo)準(zhǔn)。
First, the product introduction:
The sealing material surface dry time measuring device is a professional testing instrument for filling a sealant sample into a mold frame of a prescribed shape under a prescribed condition, and measuring the dryness of the sample by placing a film or a finger touch. Report the time required for the film or finger to have no adherent sample. It complies with GB 16776-2005 "Silicone Sealant for Construction" and GB/T 13477.5-2002 "Test Method for Measuring Sealing Time of Building Sealing Materials".
二，密封材料表干時(shí)間測(cè)定器配置：
?黃銅板：尺寸19mm×38mm，厚度約6.4mm
?模框：矩形，用鋼或銅制成，內(nèi)部尺寸25mm×95mm，外形尺寸50mm×120mm，厚度3mm。(需要外加工)
?玻璃板：尺寸80mm×130mm，厚度5mm
?聚乙烯薄膜：2張，尺寸25mm×130mm，厚度0.1mm
?刮刀 無(wú)水乙醇
Second, the sealing material surface time measuring device configuration:
? Brass plate: size 19mm × 38mm, thickness about 6.4mm
? Mold frame: rectangular, made of steel or copper, internal dimensions 25mm × 95mm, external dimensions 50mm × 120mm, thickness 3mm. (requires external processing)
? Glass plate: size 80mm × 130mm, thickness 5mm
? Polyethylene film: 2 sheets, size 25mm × 130mm, thickness 0.1mm
? scraper
三，試件的制備：
用丙酮等溶劑清洗模框和玻璃板。將模框居中放置在玻璃板上，用在（23±2）℃下至少放置過(guò)24h的試樣小心填滿模框，勿混入空氣。多組分試樣在填充前應(yīng)按生產(chǎn)廠的要求將各組分混合均勻。用刮刀刮平試樣，使之厚度均勻。同時(shí)制備兩個(gè)試件。
Third, the preparation of the test piece:
The mold frame and the glass plate are washed with a solvent such as acetone. Place the mold frame on the glass plate and carefully fill the mold frame with a sample that has been placed at least (24 ± 2) °C for 24 hours. Do not mix air. Multi-component samples should be mixed evenly before filling according to the requirements of the manufacturer. Stencil the sample with a spatula to make it uniform in thickness. Two test pieces were prepared at the same time.
四，試驗(yàn)方法與步驟：
?方法A
1，將制備好的試件在標(biāo)準(zhǔn)條件下靜置一定的時(shí)間
2，然后在試樣表面縱向1/2處放置聚乙烯薄膜，薄膜上 位置加放黃銅板。
3，30s后移去黃銅板，將薄膜以90°角從試樣表面在15秒內(nèi)勻速揭下。
4，相隔適當(dāng)時(shí)間在另外部位重復(fù)上述操作，直至無(wú)試樣粘附在聚乙烯條上為止。
5，記錄試件成型后至試樣不再粘附在聚乙烯條上所經(jīng)歷的時(shí)間
?方法B
1，將制備好的試件在標(biāo)準(zhǔn)條件下靜置一定的時(shí)間.
2，然后用無(wú)水乙醇擦凈手指端部，輕輕接觸時(shí)間上三個(gè)不同部位的試樣。
3，相隔適當(dāng)時(shí)間重復(fù)上述操作，直至無(wú)試樣粘附在手指上為止。
4，記錄試件成型后至試樣不再粘附在手指上所經(jīng)歷的時(shí)間
密封材料表干時(shí)間測(cè)定器實(shí)驗(yàn)結(jié)果判定
表干時(shí)間≤3h，判定為合格
Fourth, experimental methods and steps:
? Method A
1. The prepared test piece is allowed to stａnd under standard conditions for a certain period of time.
2. Then, a polyethylene film is placed at a longitudinal direction of the surface of the sample, and a brass plate is placed on the center of the film.
After 3,30 s, the brass plate was removed and the film was peeled off at a constant angle of 15 seconds from the surface of the sample within 15 seconds.
4. Repeat the above procedure at another location at appropriate intervals until no sample adheres to the polyethylene strip.
5, record the time after the test piece is formed until the sample no longer adheres to the polyethylene strip
? Method B
1. The prepared test piece is allowed to stａnd under standard conditions for a certain period of time.
2, then wipe the end of the finger with absolute ethanol, gently touch the sample of the three different parts of the time.
3. Repeat the above procedure at appropriate intervals until no sample adheres to the finger.
4. Record the time elapsed after the test piece is formed until the sample no longer adheres to the finger.
Determination of experimental results of sealing material surface dry time tester
Dry time ≤ 3h, judged to be qualified。
五，試驗(yàn)過(guò)程注意事項(xiàng)：
?表干時(shí)間的數(shù)值修約
?表干時(shí)間少于30min時(shí)，精確至5min；
?表干時(shí)間在30min至1h之間時(shí)，精確至10min；
?表干時(shí)間在1h至3h之間時(shí)，精確至30min；
?表干時(shí)間超過(guò)3h時(shí)，精確至1h。
Five, the test process notes:
? Numerical repair of the dry time
? When the dry time is less than 30min, the accuracy is 5min;
? When the surface drying time is between 30min and 1h, it is accurate to 10min;
? When the surface drying time is between 1h and 3h, it is accurate to 30min;
? When the surface dry time exceeds 3h, it is accurate to 1h.
