Multi-ply fibrous product comprising a laminating adhesive with a dermatologically acceptable acid
A multi-layer fiber, dermatological technology, applied in adhesives, household utensils, textiles and paper, can solve problems such as pH differences
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preparation example Construction
[0079] The traditional dry crepe preparation method comprises the following steps:
[0080] - Compression and drying of wet paper fibers into sheets on large diameter heated drums (also known as Yankee dryers); and
[0081] - The dried paper fiber sheet is then separated and creped by means of metal blades which are applied against the roll and crosswise to its direction of rotation.
[0082] The creping operation creates undulations in the sheet in a direction crossing the traveling direction of the sheet. The creping operation increases the thickness of the sheet and imparts elasticity and touch (soft touch) properties to the sheet.
[0083] TAD preparation method comprises the following steps:
[0084] - molded wet paper fibrous sheets on fabric; and
[0085] - The sheet is then dried at least partly by a stream of hot air passing through the sheet.
[0086] The dried sheet can then be creped.
[0087]Furthermore, in the preparation of the tissue paper web to be used, ...
Embodiment 1
[0172] Preparation of Aqueous Adhesive Compositions
[0173] By dissolving 85% lactic acid (264 g, 15% water) and KOH (5 g) in H 2 In O (736 g), a potassium lactate buffer with a pH of 2 was prepared. The molar content of lactic acid ("acid molarity") calculated from these values was 2.366 mol / l. Acid molarity refers to the total amount of acid added, regardless of whether a portion of it is present as lactate due to the addition of KOH.
[0174] Then, the buffer solution was mixed with 429 g of polyvinyl alcohol-based aqueous binder ( tak 1004, about 18.0% solids; available from H.B. Fuller in Europe, pH about 4.5) mixed to give a ratio of 70% by weight potassium lactate buffer solution to 30% by weight tak 1004. After mixing, the adhesive component had a solids content of about 5.4% by weight, based on the total aqueous adhesive composition. The pH of the resulting aqueous adhesive composition was about 2.3.
[0175] Preparation of Tissue Products
[0176] Produced ...
Embodiment 13
[0204] The effect of the tissue paper product of Example 7 on the pH of the skin surface of the forearm was tested using the five-person panel and flat face electrode method described above. The results are listed in Table 2 below.
[0205] Table 2
[0206]
[0207] The above results show that the pH of healthy skin can be stabilized by the tissue of the present invention even though the coarse tissue used therein has a rather high pH (pH 9.0 as in the case of Example 7).
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