欧美乱轮视频I久久午夜神器I一区二区视频久久I国产毛片毛片毛片毛片毛片I成人xx视频I91插插插插插插插插I色网在线视频I国产资源第一页I女人18片毛片30分钟I国产在线色I国产精品tvI欧美视频一区二区在线观看I天天操免费视频I一区二区精品在线观看I中文字幕精品无I亚洲成人乱码I亚洲卡一I日韩性爰视频I性欧美精品中出I亚洲高清不卡I黑人无套内谢中国美女I国产大片avI亚洲高清在线一区I成人免费区I成人久久18免费

The Stein Hall Viscosity Cup is used in viscosity testing where the number of seconds required for a set volume of adhesive to flow through the viscometer’s orifice. Viscosity is an important property of starch based adhesives and strongly affects bonding at the corrugator. Some pastes are too thick for certain paper and some are too thin, this is where viscosity testing is important. The apparent viscosity of adhesives used in the manufacture of corrugated containerboard is measured by the number of seconds required for 100 cc of adhesive to pass through an orifice in a disc. The instrument used throughout the industry since 1934 is called a Viscosity Cup or Stein-Hall Cup. The readings obtained do not directly correspond with any other viscosity scale.

The cup must be calibrated before performing the test. Check the orifice to make sure it is not plugged, corroded or worn. Manufacturing variations in orifice size and tube diameter make it necessary to calibrate each cup to a known standard. In addition, calibration may be required due to a worn disc or when replacing the disc.
 

Calibration Procedure: Place your finger over the orifice and fill the cup with 75°F (24°C) water. Remove your finger and, with a stopwatch, measure the time it takes for the level in the cup to drop from the upper pin to the lower pin. The time should be 15 seconds. If it is longer than that, bend the pins together and check the calibration again. If it is shorter than that, bend the pins apart and check the calibration again. Continue until the time is 15 seconds.

General Instructions Fill the cup with strained adhesive and, with a stopwatch, measure the time it takes for the level in the cup to drop from the upper pin to the lower pin. The time in seconds is the Stein-Hall viscosity. Record the time and temperature of adhesive