JPH04276228A - Laminated paper sheet for cleaning - Google Patents

Abstract

PURPOSE:To increase the strength of a laminated paper sheet, and enable the clean laminated surface of the sheet to be used for finish cleaning after peeling off a contaminated sheet by bonding each sheet with such strength as allowing easy separation in the laminated paper sheet having both sides coated like a mesh with water insoluble bonding material. CONSTITUTION:A pulp material made of marcerized conifer bleached Kraft pulp is formed into a sheet of 25g/m<2> weight, using a Fortliner/Yankee patter machine. One side of the sheet is coated with a self-cross-linking type acrylic binder as a bonding material (coating material). Two sheets so coated are bonded to each other and dried. In this case, the aforesaid two sheets are bonded with strength allowing easy separation. Also, the amount of the coating material to be used is 6g/m<2>. According to this construction, both of a laminated paper sheet and a separated sheet give enough strength for use in a cleaning work.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to laminated cleaning paper sheets.

0002

[Prior art and problems to be solved by the invention] Conventionally,
When cleaning hard surfaces such as kitchens, toilets, bathrooms, etc. at home, it is often the case that a dedicated cleaning agent is used as a undiluted solution or diluted, and a rag is used as a cleaning tool for the purpose of cleaning. In the case of rags, if they are not rinsed thoroughly after use, they may emit a strange odor, which may cause problems the next time they are used. Therefore, disposable cleaning sheets using pulp have recently become commercially available.

[0003] When the dirt is severe, a laminated paper sheet made by gluing multiple sheets together is bulky, soft, and easy to use because it is easy to apply force. When such a laminated paper sheet is used, a heavily soiled area is cleaned, and when both surfaces become soiled, it is discarded and a new sheet is used for final cleaning.

[0004] However, resource issues and waste issues have recently become a focus of attention, and there is a demand for disposable cleaning sheets that are less wasteful and have sufficient strength to withstand cleaning operations.

[0005] The present invention was made to solve these problems, and although it is made of a pulp sheet, it is a disposable sheet with little waste, has a good feeling of use, and has sufficient resistance to cleaning work. The objective is to provide a laminated paper sheet with the strength obtained.

[0006]

[Means for Solving the Problems] As a result of intensive research to achieve the above object, the present inventors have completed the present invention.

That is, in the present invention, a water-insoluble binding substance is coated in a mesh pattern on one surface of a sheet made by wet paper-making from pulp alone or a mixture of pulp and adhesive fibers, and another sheet is adhered to this surface. A cleaning method characterized in that the laminated paper sheet is made into a laminated paper sheet, and a water-insoluble binding substance is coated on both surfaces of the laminated paper sheet in a mesh pattern, and the sheets are bonded to each other with a strength that allows them to be easily peeled off. The present invention provides laminated paper sheets for

The laminated paper sheet of the present invention has the following advantages. ■ By applying a water-soluble binding substance to the surface of the laminated sheet in a mesh pattern, water resistance is improved and repeated use becomes possible. (2) By applying a water-insoluble bonding substance in a mesh pattern to the laminated surfaces between the laminated sheets and adhering them, the strength of the sheets is increased while maintaining the water and oil absorbing properties of the sheets. ■ The sheets that make up the laminated paper sheet are bonded together with such strength that they can be easily peeled off by hand, so if the laminated paper sheet becomes dirty, it can be peeled off and the clean laminated surface can be used for finishing cleaning, reducing waste. few.

The present invention will be explained in more detail below.

First, the sheet used in the present invention is as follows (a)
(a)/(b) = 85/15 ~ 0 of one or two or more pulps selected from group and group (b).
/100, preferably 70/30 to 10/90 (
It is desirable to obtain the paper by mixing and wet paper-making at a ratio of (weight ratio).

(a) Softwood bleached or unbleached kraft pulp Softwood bleached or unbleached sulfite pulp Hardwood bleached or unbleached kraft pulp Hardwood bleached or unbleached sulfite pulp (b) Softwood bleached or unbleached chemi-thermomechanical pulp Hardwood bleached or unbleached Bleached chemical thermomechanical pulp Bleached softwood or unbleached kraft pulp mercerized hardwood bleached or unbleached kraft pulp mercerized softwood bleached or unbleached mechanical chemical treated pulp Hardwood bleached or unbleached mechanical chemical treated pulp ( Pulp from group a) alone has poor water and oil absorption properties, and pulp from group (b) can be used alone, but it is better to use a mixture of pulp from group (a) and group (b) because it is bulky and has poor water absorption. This method is more preferable because a sheet with good properties and oil absorption can be obtained.

The sheet according to the present invention has the above (a)/(b)
) It is preferable to use a paper obtained by further mixing adhesive fibers with mixed pulp and making wet paper. By mixing adhesive fibers, it is possible to obtain a sheet that is elastic even when water is absorbed, shows little fatigue even after repeated use, and has good emboss retention properties. The ratio of mixing adhesive fibers into mixed pulp is
Mixed pulp/adhesive fibers are preferably mixed at a ratio of 97/3 to 70/30 (weight ratio). Adhesive fibers include heat-fusible fibers, in which a portion of the surface of the fibers is melted by heat treatment at high temperatures (for example, 100°C or higher), and the fibers work to form an adhesive structure, as well as heat-fusible fibers, which exhibit adhesive properties at high temperatures and high humidity. There are fibers that develop. Particularly good are polyethylene terephthalate (PET), polyolefin, and polyvinyl alcohol fibers. The basis weight of the sheet obtained by wet papermaking of pulp alone or a mixture of pulp and adhesive fiber is 10 to 100 g/m2
, preferably 10 to 40 g/m2.

To laminate the sheets, as shown in FIG. 1, a water-insoluble binding substance is coated in a mesh pattern on one side of the sheet 1, and another sheet 3 not coated with the binding substance is laminated and bonded. do. Even when three or more layers are laminated, they are basically laminated in the same manner as two laminated sheets are laminated. One surface and then the other surface of the laminated sheet thus obtained is coated with a binding substance, preferably the same binding substance used for the laminated surface, in a mesh pattern identical to that of the laminated surface. do. By using the same water-insoluble binding substance and coating pattern on both surfaces of the laminated sheet and the adhesive surface, not only the manufacturing cost is lowered, but also the strength of the sheet is further increased, and the sheet is easier to use. Can be done.

[0014] The net shape when applying the binding substance to the sheet surface means that any point on the sheet surface where the binding substance is not applied is substantially surrounded by the applied part of the binding substance in the horizontal direction of the surface. means that it is Pattern coating is best for implementation. That is, the coating pattern is not particularly limited, but it is preferable to apply the coating in a lattice (square), rhombus, or hexagonal hexagonal pattern with a width of 1 to 4 mm, for example, as shown in FIG.

The binding substance applied to the surface of the sheet is a polymeric compound that is substantially water-insoluble, such as acrylic acid lower (C1-C8) alkyl ester, methacrylic acid lower (C1-C8) alkyl ester, maleic anhydride. Acid lower (C1 to C8) alkyl esters, one type selected from these, preferably a copolymer of two or more types, or a copolymer of these with ethylene, vinyl acetate, etc., and if necessary, acrylic acid, methacrylic acid acid,
A copolymer with maleic anhydride, more preferably a self-crosslinking polymer compound further copolymerized with a monomer such as N-methylolacrylamide or epoxide, is preferred. The self-crosslinking type has improved water resistance because the copolymer crosslinks and becomes three-dimensional. Further, the sheet needs to maintain a soft feel even after repeated use, and for this reason it is desirable to use a bonding material with a glass transition point of 10° C. or lower. In the present invention, the bonding substance applied to the sheets is adjusted to such an extent that the sheets can be easily peeled off by hand, and is generally 1 to 10 g/m2 per surface.

[0016]

Effects of the Invention The laminated paper sheet for cleaning of the present invention can be used as it is or as a cleaning sheet pre-impregnated with a cleaning liquid for cleaning hard surfaces such as desks, sinks, bathtubs, etc. When cleaning a large surface, it can be rinsed with a cleaning liquid or water and then wrung out before use without reducing the ease of cleaning or the cleaning effect. Particularly when adhesive fibers are mixed, there is little wear and tear due to repeated use.

[0017] In the cleaning laminated paper sheet of the present invention, the sheets constituting the laminated paper sheet are bonded together with such strength that they can be easily peeled off by hand, so if the laminated paper sheet becomes dirty, it can be peeled off and the sheets will remain clean. There is less waste because the laminated surface can be used for final cleaning.

[0018]

[Examples] The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Softwood bleached kraft pulp (NBKP) and pulp 80 obtained by mercerizing softwood bleached kraft pulp:
The pulp raw materials mixed at a ratio of 20% were made into a sheet with a basis weight of 25g/m2 using a Fourdrinier/Yankee paper machine. Wet paper strength enhancer "Kaimen 557" is used to obtain wet paper strength.
H” (manufactured by Dick Hercules Co.) to pulp 1.2
It was added to the mixed pulp raw material in a proportion of % by weight. The raw material pulp was used unbeaten, and the crepe rate was set at 17%. A self-crosslinking acrylic binder [ethyl acrylate/butyl acrylate/ethyl methacrylate/N-methylol acrylamide = 75/22.5/2/0.5 ( 50% emulsion (weight ratio), glass transition point -18℃]
One side was coated using a gravure coating roll with a hexagonal pattern as shown in Figure 2, the two sheets were pasted together, and the sheets were dried. At this time, the two sheets were bonded together with such strength that they could be easily peeled off by hand. Furthermore, a coating agent is applied to one side of the pasted sheets using a gravure coating roll with the same tortoiseshell pattern, and after drying, the coating agent is applied in the same manner to the other surface, and then dried. , embossed. The coating agent applied to the two-layered sheet was 6 g/m2 (total dry weight of intersheet coating agent and both surface coating agents). This laminated paper sheet was impregnated with household detergent and used for cleaning around the kitchen. Cleaning was performed using a laminated paper sheet, and after both surfaces of the sheet became dirty, it was peeled off and final cleaning was performed using the adhesive side as the cleaning surface. At this time, both the laminated paper sheet and the peeled sheet showed sufficient strength for cleaning work.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a laminated paper sheet of the present invention.

FIG. 2 is a schematic illustration of a tortoiseshell pattern for applying a binding substance.

[Explanation of symbols]

1 Laminated sheet surface 2 Adhesive surface 3　Laminated sheet back side

Claims (1)

[Claims] Claim 1: A laminated paper sheet is produced by applying a water-insoluble binding substance in a mesh pattern to one surface of a sheet made by wet paper-making pulp alone or a mixture of pulp and adhesive fibers, and adhering another sheet to this surface. A laminated paper sheet for cleaning, characterized in that the laminated paper sheet is coated with a water-insoluble binding substance in a mesh pattern on both surfaces of the laminated paper sheet, and the sheets are bonded to each other with a strength that allows them to be easily peeled off. .