Water absorptiveness of sized (non-bibulous) paper, paperboard, and corrugated fiberboard (Cobb test), Test Method T om This method describes a procedure for determining the quantity of water absorbed by nonbibulous paper, paperboard, and corrugated fiberboard in a specified time under standardized conditions. 5 / Water absorptiveness of sized (non-bibulous) paper, T om paperboard, and corrugated fiberboard (Cobb test) NOTE 3: On corrugated fiberboard, some users have overcome leakage by either removing the flutes from the back of a sample or by crushing the flutes prior to testing. The instrument helps to calculate the Cobb value i.e. the mass of water absorbed in a specific time by 1 square meter i.e. ( sq. feet) of paper, board, or corrugated fiberboard in 1 cm of water. Specifications of the Instrument as per the Standards. Specimen Holder – Type: Metal ring type holder with a machined lower face. Water absorption tester- Cobb Tester is used for the determination of the water absorption of sized paper, paperboard, and corrugated paper under standard conditions within to g/m2 range by Cobb method. It is adopted with overturn structure for ease of operations.
Water absorbency of sized paper and paperboard by the Cobb method by Scandinavian Pulp, Paper and Board Testing Committee. First published in The lower Cobb value is better the water resistance of paper (Hu et al., ). In other words, a lower value means the paper has a higher resistance to water and liquids. Such papers should be tested in accordance with TAPPI T “Water Absorptiveness of Sized (Non-Bibulous) Paper and Paperboard (Cobb Test). For corrugating medium use TAPPI T “Water Absorbency of Corrugating Medium.” The water absorption results of this method can be used to judge the acceptability of tissue, toweling and blotter. The COBB value has to be maintained as per the need of paper or board. This test procedure includes a quantity of water absorbed in a specified time by no bibulous paper and paperboard with a minimum mm thickness. Features and Equipment. A cylindrical panel which is clamped to a flat base along with a flexible backing to place Key features.
Good Price Water Absorptiveness Of Sized Paper Iso Cobb Sizing Tester Zb-cobb, Find Complete Details about Good Price Water Absorptiveness Of Sized Paper Iso Cobb Sizing Tester Zb-cobb,Cobb Tester,Paperboard Tester,Paperboard Test Equipment from Testing Equipment Supplier or Manufacturer-Hangzhou Zhibang Automation Technology Co., Ltd. The Cobb value (water absorbency) and porosity value of paper and paperboard can be adapted to suit the performance required (see Fig. ). Water-based adhesives ideally require an absorbent surface to dry and set the adhesive by fast removal of water. This allows for efficient adhesion in bag, sack and carton making and labelling. The TAPPI Standard Test Method, TAPPI –T is used for determination of water quantity absorbed by non-bibulous paper material, such as plain paper, paperboard, corrugated fibreboard. The test is an important step in quality assurance of such paper material as water absorptiveness is a vital factor in deciding various characteristics of a. This method describes a procedure for determining the quantity of water absorbed by nonbibulous paper, paperboard, and corrugated fiberboard in a specified time under standardized conditions. It is based on studies by Cobb and Lowe (1), Cobb (2) and other investigators (3, 4). For testing unsized and absorbent paper, paperboard, or.