Multi-ply tissue product produced from a single ply tissue web
A tissue paper, multi-layer sheet technology, applied in the direction of layered products, tissue/absorbent paper, paper/cardboard layered products, etc., can solve problems such as expensive and inefficient
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Embodiment 1
[0086] The base sheet (also referred to herein as the first single-ply tissue web) was made using a through-air drying papermaking process commonly referred to as "uncreped through-air drying" (" UCTAD"), and is generally described in U.S. Patent No. 5,607,551, the contents of which are incorporated herein in a manner consistent with the present invention. A substrate was prepared with a target anhydrous dry basis weight of about 45 grams per square meter (gsm).
[0087] In all cases, substrates were prepared from furnishes comprising Northern Softwood Kraft (NSWK) and Southern Softwood Kraft (SSWK) using a stratified headbox fed by three hoppers such that the paper The web has three layers (two outer layers and one middle layer). The first outer layer, corresponding to the surface of the paper web not in contact with the papermaker's fabric during manufacture, comprised NSWK and was 30% by weight of the total web. The middle layer contained SSWK and was 40% of the total wei...
Embodiment 2
[0097] Substrates with a target basis weight of 39 gsm were prepared using the UCTAD process approximately as described in Example 1, except that a t1207-11 transfer fabric (commercially available from Voith Fabrics, Appleton, WI) and a t2301-11 air-through Drying fabrics (commercially available from Voith Fabrics, Appleton, WI) and wet webs were subjected to 20% haste transfer from the transfer fabric to the through-air drying fabric. Strength was controlled via addition of carboxymethyl cellulose (CMC), Kymene and / or by refining NSWK ingredients as shown in Table 3 below.
[0098] table 3
[0099]
[0100] After fabrication, the substrate is initially wound as a parent roll, which is then unrolled on a lab converting line. The sheet is initially split by hand and then passed by hand through the converting apparatus. Once split and passed, the converting line was run at a speed of 100 meters per minute (mpm) to produce a roll of two-ply tissue paper product with a diamet...
Embodiment 3
[0105] The substrate for this example was made as in Example 1, but with 20% hasty transfer to the through-air drying fabric, and had a target basis weight of about 60 gsm. Strength was controlled via the addition of carboxymethylcellulose (CMC), Kymene and / or by refining the NSWK furnish, as shown in Table 5 below.
[0106] table 5
[0107]
[0108] After fabrication, the substrate is initially wound as a parent roll, which is then unrolled on a lab converting line. The sheet is initially split by hand and then passed by hand through the converting apparatus. Once split and passed, the converting line was run at a speed of 100 mpm to produce a roll of two-ply tissue product in rolls with a diameter of 114 mm, a sheet count of 77, and a sheet length of 152 mm. The physical properties of the first single-ply web and the resulting two-ply tissue product are summarized in Table 6 below.
[0109] Table 6
[0110]
[0111] The substrates prepared according to Examples 2 a...
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Abstract
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