Cobb value of different papers
WebLikewise, Cobb value, one of the critical parameters affecting the structural integrity of papers, is used as a measure of the water absorptiveness of paper and paperboard-based packaging ... WebConcerning COBB, a brown kraftliner should be sized. The sized grade will be measured by the 1 minute COBB test with values typically in the range 25 g/m2 to 45 g/m2. White top kraftliner MATERIAL DEFINITION BRIGHTNESS MEASUREMENT PROPERTY REQUIREMENTS A white top kraftliner is a paper predominantly made from primary …
Cobb value of different papers
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WebMar 9, 2024 · Cobb values of the coated papers with different types of CNFs (a: linerboard, b: wood-free paper) Full size image. The pre- or post-treatment of CNFs resulted in different Cobb value curves. The LCNF coating absorbed more water than any other CNF coating at similar coat weights, but S-CNF and AKD-CNF had lower Cobb values … WebOct 26, 2016 · When compared with PP papers, corrugating medium test (CMT), corrugated crush test, and ring crush test (RCT) values of SP papers (100 g/m 2) were increased about 18.3%, 25.7%, and 41%, …
WebThe Kit test is used to quantify or compare the performance of papers and boards, used for food contact and other packaging applications where resistance to grease staining is important. The test measures the degree of repellence or anti-wicking of paper and boards which have been treated with fluorochemical sizing agents used to prevent ... WebDec 1, 2024 · The paper samples were substrate to be in contact with 100 mL of distilled water for 60 s. The weight of the water before and after contact and the difference between these weights were taken to obtain the Cobb 60 value. The oil resistance of the paper samples was measured by kit rating test according to the Chinese Standard GB/T …
WebCobb values of 38-40 g/m2 that compare well with commercial parchment paper. Compared with either pure abaca or pure wastepaper pulp, replacement with water … WebCobb Test for Papers & Paperboards A cobb test is a highly effective test method which is used to determine the water absorption strength of the papers and the sizing adequacy of the materials according to which a paper sample can be weighed and placed in a tight cylindrical vessel which is backed with a rubber gasket on a metal ring which ...
WebDec 27, 2024 · What is Cobb in paper board? Cobb test (sized papers and paperboards) The Cobb test determines the amount of water absorbed into the surface by a sized (non-bibulous) paper, paperboard, and corrugated fibreboard paper or paperboard sample in a set period of time, usually 60 or 180 seconds (Cobb60 or Cobb180). Water absorbency …
WebCobb synonyms, Cobb pronunciation, Cobb translation, English dictionary definition of Cobb. Tyrus Raymond Known as "Ty." 1886-1961. American baseball player and … hkmc-rndvpn.hyunai.netWebprocess due to environmental concerns and government regulations. In this paper, bamboo pulps from the two bleaching processes were compared with the NBSK process as reinforcing fibers in fine paper. Criteria for a reinforcement fiber include providing good runnability for both paper manufacturing and converting operations, which require h k mcjunkin pittsburghWebAlthough CA and CAH values are significant scientific data that give an idea about the interaction of hybrid paper sheet surfaces with water, the Cobb test is mainly used in the paper industry to ... hkmissjessica