Paper surface water absorption tester, Cobb type surface water absorption tester

Application of water absorption tester:
The Cobb type water absorption tester is designed based on the basic parameters and requirements specified in GB/T1540-2002 Determination of Water Absorption of Paper and Paperboard (Cobb method). This standard is applicable for determining the water absorption of various paper or cardboard surfaces. But it is not suitable for accurately evaluating the writing performance of paper or cardboard
--------------------------------------------------------------------------------
Product features of water absorption tester:
Surface water absorption (Cobb) value of paper and cardboard:
The amount of water absorbed by the surface of a unit area of paper and cardboard under certain pressure and temperature within a specified time, measured in grams per square meter.
The specific formula is as follows:
C=(G2-G1) × 100. In the formula: C-Cobb water absorption value; G2- The mass of the sample weighed after absorbing water; G1- The mass of the sample weighed before water absorption.
The paper and paperboard absorption tester is a conventional instrument for testing the surface water absorption of paper and paperboard, also known as the paper surface absorption weight tester. This instrument adopts the Cobb test method among various absorption test methods, and is therefore also known as the Cobb absorption tester
--------------------------------------------------------------------------------
Technical parameters of water absorption tester:
1. The inner cross-sectional area of the metal cylinder is 100 ± 0.2 cm2 (corresponding inner diameter is 112.8 ± 0.2mm), the cylinder height is 50mm, and the contact part between the cylinder ring surface and the sample should be smooth.
2. The fixed weight of absorbent paper is 200-250g/㎡, and its absorption rate is 75mm/10min. When the single layer weight of absorbent paper is less than 200-250 g/㎡, multiple layers can be stacked to meet the requirements.
3. Smooth metal flat roller: The length of the roller should be 200 ± 0.5mm, and the mass should be 10 ± 0.5kg.
4. Experimental water consumption: 100mm ± 5ml.
5. Size and weight:
Size: 480 × 400 × 420 (mm),
Weight: 28kg
--------------------------------------------------------------------------------
Execution standards for water absorption tester and surface absorption tester
1. GB/T 1540 Determination of Water Absorption of Paper and Paperboard Cobb Method
2. ISO 535 Determination of Water Absorption of Paper and Paperboard Cobb Method
3. QB/T 1668 Water Absorption Tester