JPH01148229A - Wiping-off sheet for cleaning - Google Patents

Abstract

PURPOSE: To improve wiping properties to water and oil without mechanical system by combining two kinds of fibers or pulps with different crosssections at a specified ratio and mixing them and performing wet paper manufacturing of the mixture. CONSTITUTION: One or two or more of pulps respectively selected from the groups a and b are mixed by a ratio of a/b=85/15-60/40(wt. ratio) and wet paper manufacturing of the mixture is performed. The group (a) is bleached or unbleached kraft pulp of coniferous wood, bleached or unbleached sulfite pulp of coniferous wood, bleached or unbleached kraft pulp of hardwood, bleached or unbleached sulfite pulp of hardwood, etc. The group (b) is bleached or unbleached chemithermomechanical pulp of coniferous wood, bleached or unbleached chemithermo-mechanical pulp of hardwood, mercerized pulp of bleached or unbleached kraft pulp of coniferous wood, etc. The pulps of the groups (a) and (b) have different crosssections each other. The crosssection being at right angles in the longitudinal direction has mainly a flat shape in the group a and the group (b) has relatively a shape close to a cylindrical column.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning wiping sheet with excellent oil and water absorption properties.

[Conventional technology and its problems]

Paper products such as tissues and kitchen paper are often used to wipe away liquid stains such as water and oil. These paper products are required to have water absorption and oil absorption properties, and mechanical methods are currently being used to improve these properties.

For example, paper machines that eliminate the pressure step in the paper manufacturing process and produce bulky sheets have been developed, and
Efforts have been made to improve wiping performance by applying heavy ply processing to form an internal air pocket between two sheets of paper.

However, there are limits to how much water and oil absorption can be improved by these mechanical methods, and as the applications of paper expand to the extent they are today, limiting the number of paper-making machines is expensive in terms of cost.
It also has the disadvantage of limited versatility.

[Means for solving problems]

The present inventors investigated the development of a sheet with improved wiping properties against water and oil without relying on conventional mechanical methods. They found that the object could be achieved and completed the present invention.

That is, the present invention provides one or more pulps selected from the following groups (a) and (b), respectively, in the form of (a)/(b).
) = 85/15 to 60/40 (weight ratio) to provide a cleaning wiping sheet made by mixing and wet paper-making.

(a) Softwood bleached or unbleached kraft pulp.

Softwood bleached or unbleached sulphite pulp.

Hardwood bleached or unbleached kraft pulp.

Hardwood bleached or unbleached sulphite pulp.

(b) Softwood bleached or unbleached chemi-thermomechanical pulp.

Hardwood bleached or unbleached chemi-thermomechanical pulp.

Pulp made by mercerizing softwood bleached or unbleached kraft pulp.

The pulps of the above groups (a) and (b) used in the present invention have different cross-sectional shapes. That is, the la) group is pulp used in conventional cleaning wipe sheets, and the cross section perpendicular to the longitudinal direction has a generally flat shape as shown in FIG. On the other hand, the pulp of group iii) has a relatively cylindrical shape as shown in FIG.

The weight ratio of these two types of pulp is (a)/(b) = 85
By mixing and wet paper making in a ratio of /15 to 60/40, it is possible to improve the water absorbency and oil absorbency of the base paper itself without using special mechanical methods, and it also improves ease of use and texture. You can get good cleaning wipes.

In the present invention, wet paper making can be carried out by a commonly used method, and the basis weight of the sheet of the present invention is 1.
A range of 0 to 100 gems is preferred.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Softwood bleached kraft pulp (NBKP) and softwood bleached chemi-thermomechanical pulp (BCTMP).

(manufactured by MoDo Ce11) in the proportions shown in Table 1 were mixed into sheets of 25 g/rrf using a Cho 11/Yankee paper machine. In order to obtain wet paper strength, Kaimen 5571 (manufactured by Daycouver Cures) was added to the mixed pulp raw material at a ratio of 0.6% by weight based on the pulp.

The wiping properties of the obtained wiping sheets were evaluated by the following method.

The results are shown in Table 1.

<Evaluation of wipe sheets> A panel of 10 women engaged in housework was asked to put 5 g each of soy sauce and tempura oil on a table with a diameter of 6 cm.
25cm x 25cm
The wiping sheet was folded into four, and the wiping performance when wiped once in a certain direction was evaluated by a sensory test.

The judgment criteria at this time are as follows.

A: There was no wiping, and it was wiped cleanly.

B: Most of the dirt was wiped off, but a band-shaped wipe was clearly left.

The stains could not be wiped off with C knee wiping.

Table 1 Example 2 The sheets with Nα2.4 and 6 obtained in Example 1 were
Double ply processed using a ted embossing machine.

The wiping properties of these samples were evaluated in the same manner as in Example 1. The results are shown in Table 2.

Table 2

[Brief explanation of the drawing]

FIG. 1 is a view of the pulp of group (a) cut at right angles to the longitudinal direction, and FIG. 2 is a view of the pulp of group (b) cut at right angles to the longitudinal direction. 1: Pulp Figure 1

Claims (1)

[Claims] One or more types of pulp selected from the following groups (a) and (b), respectively, are prepared from (a)/(b) = 85/15 to
A cleaning wiping sheet made by mixing and wet papermaking at a ratio of 60/40 (weight ratio). (a) Softwood bleached or unbleached kraft pulp. Softwood bleached or unbleached sulphite pulp. Hardwood bleached or unbleached kraft pulp. Hardwood bleached or unbleached sulphite pulp. (b) Softwood bleached or unbleached chemi-thermomechanical pulp. Hardwood bleached or unbleached chemi-thermomechanical pulp. Pulp made by mercerizing softwood bleached or unbleached kraft pulp.