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Coreless roll of absorbent sheet and method for manufacturing the same

An absorbent, core roll technology, used in tissue/absorbent paper, papermaking, rolled strips, etc., can solve the problems of lack of flexibility in rolled paper products, and achieve excellent stiffness, collapse resistance, and excellent disintegration. Effect

Active Publication Date: 2020-05-08
ESSITY HYGIENE & HEALTH AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the paper on which the adhesive is applied exhibits some stiffness
As a result, rolled paper products lack flexibility, and after the roll is compressed, it is difficult to reopen the axial hollow passages in a manner that results in well-defined axial hollow passages

Method used

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  • Coreless roll of absorbent sheet and method for manufacturing the same
  • Coreless roll of absorbent sheet and method for manufacturing the same
  • Coreless roll of absorbent sheet and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

reference example 1

[0291] Reference example 1 (reference toilet paper 1)

[0292] To obtain the desired coreless roll of toilet paper, a continuous web (1) of three layers of absorbent material (basis weight: 55.6 g / m 2 , thickness: 0.62mm), conveyed from the embossing unit and sent to the rewinding unit.

[0293] In the rewinding unit, the continuous web first reaches a perforation module which pinches the web to provide perforation lines oriented transversely with respect to the machine direction (MD) and regularly spaced with respect to the transverse direction (CD). The size of the perforated section is 4 mm and the size of the unperforated section is 1 mm. The distance between the two perforation lines is 125mm.

[0294] After pinching, the web of absorbent material reaches a winding module where the web is picked up onto a temporary core (outer diameter: 38 mm) using tissue Tak 604 as "fugitive glue". The web was then wound onto a core to form a stock roll with a diameter of 120 mm (cor...

reference example 2

[0297] Reference example 2 (reference toilet paper 2)

[0298] A coreless roll was manufactured in the same manner as described in Reference Example 1 above, except that a continuous web (2) of three layers of absorbent material (basis weight: 53.6 g / m 2 , thickness: 0.47mm) is sent from the embossing unit and sent to the rewinding unit.

[0299] The prepared raw roll with a diameter of 120 mm was cut into individual rolls with a width of 99 mm using multiple raw roll saws parallel to the MD.

Embodiment 1

[0300] Embodiment 1 (toilet paper containing hydroxypropyl methylcellulose)

[0301] A coating composition was prepared by dissolving hydroxypropylmethylcellulose (HPMC) having a viscosity of 15 cP in water at a concentration of 3.7% by weight. The coating composition obtained was fed into a spray gun and applied at room temperature (22° C.).

[0302] In order to obtain the desired coreless roll of toilet paper, the coreless roll was produced in the same manner as described in Reference Example 1 above, except that, after pinching / cutting and before winding the web, the coreless roll was sprayed with a spray gun (pressure: 1.5 bar) Apply (spray) the coating composition to a length of about 1800 mm (ie about 15 sheets) upstream of the cutting line.

[0303] The amount of HPMC applied to the second end (length: 1800 mm; ie approximately 10% of the total web length) was 0.019 g / roll (HPMC solids content applied to a separate roll (ie after cutting the original roll)).

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Abstract

The present invention relates to a coreless roll of an absorbent sheet product such as napkins, toilet paper, towels made of a spirally wound continuous web of absorbent material having a first end and a second end, wherein a coating composition comprising a nonionic cellulose ether is coated onto the second end. The coreless roll of the present invention has excellent stiffness and resistance tocollapsing, as well as sufficient flexibility and elasticity. Moreover, the coreless roll of the present invention has excellent disintegrability in water and can be used up over its whole length. Thepresent invention also relates to a process for the manufacture of the coreless roll.

Description

technical field [0001] The present invention relates to coreless rolls of absorbent sheet products, such as napkins, toilet paper, towels, and the like. In one aspect of the invention, the coreless roll is provided in compressed form. The invention also relates to a method of manufacturing a coreless roll. Background technique [0002] Absorbent sheet products in roll form are widely used in modern society. Toilet paper rolls, towel rolls such as household (kitchen) towels or hand towels etc. are the main commercial items. [0003] Rolls of absorbent sheet products for household use, such as toilet paper, typically consist of a continuous web of absorbent material which is helically wound onto a prefabricated core of rigid material such as cardboard or bonded paper. The core defines an axial hollow passage centrally located relative to the roll and extending from one edge of the roll to the other edge. The axial hollow channel enables the consumer to easily install the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00
CPCD21H27/002A47K2010/3206D21H27/00D21H19/00D21H19/06D21H19/12D21H19/34A47K10/16B65H18/28D21H27/30
Inventor F·勒施Y·恩加塞尔A·博恩N·魏桑
Owner ESSITY HYGIENE & HEALTH AB