85 – Paper technology – PDF Standards Store ?u= Wed, 06 Nov 2024 05:20:34 +0000 en-US hourly 1 https://wordpress.org/?v=6.7.1 ?u=/wp-content/uploads/2024/11/cropped-icon-150x150.png 85 – Paper technology – PDF Standards Store ?u= 32 32 TAPPI UM 579:2015 ?u=/product/publishers/tappi/tappi-um-5792015/ Wed, 06 Nov 2024 05:20:34 +0000 Water Repellence of Paper and Boards
Published By Publication Date Number of Pages
TAPPI 2015-03-16 3
]]> This method describes a procedure for measuring water repellence of paper, paperboard, or combined board which has been treated to produce water repellence. This method can be used for a wide range of products, from sheets having only slight water repellence to sheets with wax sizings or coatings that have a high degree of water repellence.

This method is useful for sheets treated with such materials as a stearic chrome complex, polyvinylidine chloride, polyvinyl compounds, commercial varnishes, paraffin wax impregnations, and paraffin wax coatings. The sheet may be produced directly on the paper machine or subsequently coated.

The method is not practical for plastic extrusion coatings, heavily wax-coated, not certain curtain-coated grades which have a hard wax/resin type of coating, for which the test period becomes prohibitively lengthy.

]]> TAPPI UM 542:2015 ?u=/product/publishers/tappi/tappi-um-5422015/ Wed, 06 Nov 2024 05:20:32 +0000 Amount of Coating on Mineral-Coated Paper
Published By Publication Date Number of Pages
TAPPI 2015-05-06 3
]]> This method is suitable for the ordinary types of mineral coatings. It may not be effective for special types, such as where lacquers or other materials are used to impart a high degree of water resistance. It is not suitable for coatings containing synthetic binders.

]]> TAPPI UM 555:2015 ?u=/product/publishers/tappi/tappi-um-5552015/ Wed, 06 Nov 2024 05:20:32 +0000 Testing of Grease-Repellant Treated Paper
Published By Publication Date Number of Pages
TAPPI 2015-05-06 3
]]> This method describes a procedure for testing grease repellency of flexible packaging materials. It is an accelerated test designed to measure the repellency and resistance of oil and grease penetration of fluorochemically treated flexible packaging materials.

This test is intended to supplement TAPPI T 454 "Turpentine Test for Voids in Glassine and Greaseproof Papers" and TAPPI T 507 "Grease Resistance of Flexible Packaging Materials."

]]> TAPPI UM 566:2015 ?u=/product/publishers/tappi/tappi-um-5662015/ Wed, 06 Nov 2024 05:20:32 +0000 Wetting Shipping Sack Paper for Testing
Published By Publication Date Number of Pages
TAPPI 2015-03-23 2
]]> This method is applicable to the preliminary treatment of shipping sack paper prior to testing its properties when wet.

]]> TAPPI UM 411:2015 ?u=/product/publishers/tappi/tappi-um-4112015/ Wed, 06 Nov 2024 05:20:31 +0000 Opacity of Paper Using 45 Degree/0 Degree Geometry Reflectometer
Published By Publication Date Number of Pages
TAPPI 2015-04-01 4
]]> The object of this method is to determine paper opacity by measuring the ratio of the reflectance of paper backed by black and white using an instrument equivalent to the geometry of the TAPPI brightness measurement instrument. Approximate TAPPI opacity is measured by contrast ratio of the specimen reflectance backed by a black cavity to white backing of 89%. The term "approximate" is used to differentiate the TAPPI opacity measured with this procedure to the TAPPI opacity measured using an instrument that conforms to the measurement of opacity as specified in the geometry in T 425 "Opacity of paper (15/d geometry, illuminant A/2°, 89% reflectance backing and paper backing)."

]]> TAPPI UM 3:2015 ?u=/product/publishers/tappi/tappi-um-32015/ Wed, 06 Nov 2024 05:20:31 +0000 Determination of Useful Fiber in Bagasse
Published By Publication Date Number of Pages
TAPPI 2015-04-01 3
]]> This method describes a procedure for estimating the percentage of useful fiber, pith, and soluble matter in bagasse.

Pith and fiber occur in bagasse closely adhered together. Both of them, after swelling in water, become loose and can be effectively separated from each other by a washing and combining action on a sieve.

]]> TAPPI UM 253:2015 ?u=/product/publishers/tappi/tappi-um-2532015/ Wed, 06 Nov 2024 05:20:28 +0000 Laboratory Processing of Pulp (Ball or Pebble-Mill Method)
Published By Publication Date Number of Pages
TAPPI 2015-04-01 4
]]> This method concerns the processing of pulp by means of a laboratory ball or pebble-mill prior to forming handsheets for determining pulp behavior when subjected to beating [see also TAPPI T 200 "Laboratory Processing of Pulp (Beater Method)," TAPPI T 248 "Laboratory Beating of Pulp (PFI Mill Method)," UM 221 "Laboratory Processing of Pulp (Plate Refiner)," and UM 258 "Laboratory Processing of Pulp (Kollergang Method)"]. Only the furnishing and processing of the stock and the withdrawal and dilution of samples are described. The forming of sheets is described in TAPPI T 205 "Forming Handsheets for Physical Tests of Pulp," their physical testing in TAPPI T 220 "Physical Testing of Pulp Handsheets," and their classification in TAPPI T 233 "Fiber Length of Pulp by Classification."

This method has the advantage of small specimen size and good reproducibility of beating action.

]]> TAPPI UM 240:2015 ?u=/product/publishers/tappi/tappi-um-2402015/ Wed, 06 Nov 2024 05:20:27 +0000 Shive Content of Mechanical Pulp (Laboratory Flat Screen)
Published By Publication Date Number of Pages
TAPPI 2015-03-30 3
]]> The objective of this method is to determine the harmful shive content of mechanical pulps by screening on a laboratory flat screen.

]]> TAPPI UM 242:2015 ?u=/product/publishers/tappi/tappi-um-2422015/ Wed, 06 Nov 2024 05:20:27 +0000 Shive Content of Mechanical Pulp (Somerville Fractionator)
Published By Publication Date Number of Pages
TAPPI 2015-03-30 3
]]> This method for shive determination makes no attempt to classify the undesirable material in detail, but such a refinement should be within the reach of any user of the method if desired. The dimensional limits dividing acceptable mechanical pulp from objectionable material are arbitrary; this method has been designed to ensure as far as possible that no useful material is included in the rejects and that no objectionable material remains in the accepted pulp. Sulfite pulps, examined according to this method, give results in the order of 0.05% shives, an indication that few long fine fibers are included in the rejected portion of the pulp. Accordingly, the method may be used for mechanical pulp containing some machine broke.

]]> TAPPI UM 203:2015 ?u=/product/publishers/tappi/tappi-um-2032015/ Wed, 06 Nov 2024 05:20:26 +0000 Freeness of Pulp (Williams Tester)
Published By Publication Date Number of Pages
TAPPI 2015-04-15 3
]]> The Williams freeness tester provides a means of measuring freeness of stock from a beater or other refining equipment. The freeness is measured as the time (seconds) for drainage of 3 g of pulp in 1 L of water (0.3% consistency) through an 80-mesh wire screen.

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