JP2003073998A - Peelable backing paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat adhesive backing paper capable of being peeled without damaging a piece of work in a dry process or a semi-wet process so that the work can be suitably mounted again. SOLUTION: This backing paper is obtained through a multiple layer papermaking process so that it has a first layer having a hot melt adhesive layer on one side and coming into contact with a work. At least one boundary face between layers formed in the multiple layer paper making process is imparted with a function enabling easy interlaminar separation. The first method for imparting such function is that a bonding strength of the boundary of specified two layers is made weak so that the boundary is predetermined as a peeling site due to interfacial breaking. The second method is that, in order to specify a site at which specific two layers are separated from each other, a peeling layer consisting of an adhesive having an internal bonding strength weaker than those of the paper sheets of the specific two layers is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backing paper used for a liner such as a scroll, scroll, etc., which is lined with paper or cloth on a work such as a book or a painting, and a forehead, sliding door, folding screen, etc. , Backing paper that can be easily peeled off from the work when re-applied.

The terms used in this specification are written by Taro Okaiwa.
Issued on July 20, 1996. It is based on pages 124-125 of "Handbook II of Japanese paper" edited by the National Federation of Handmade Washi Papers, and "lining" is a field of surface decoration, where paper and cloth are used for works such as books and paintings. It means the act of reinforcing by applying from the back side.
As for the format of "appearance", in addition to "axle" and "guiseu",
There are quires and folded books. The "axle" is intended for wrapped items such as hangings and scrolls, and the hangings line the work lined with skin with an additional backing and a total backing three times in total. "Kouzo" means a wooden base, such as a frame, sliding doors, folding screen, etc.
It means a work that is lined with skin and is shaped, and "framed" means finishing to a forehead.

[0003]

2. Description of the Related Art Conventionally, as for the outerwear, "skin lining" is manually applied, and then "additional lining" is applied depending on the application.
The "total lining" was done manually or mechanically to finish the hanging scroll. Here, "skin lining" is the basic lining that reinforces the work.
Japanese paper (about 22 g / m ² ) is used as the material and wheat starch paste is used as the adhesive. "Additional lining" means to adjust the thickness of the so-called work of this paper and the thickness of the front cover, and to adjust the strength of the waist for wrapping, and apply the creases whose thickness has been adjusted to the periphery of the main paper in order. Cut into the appropriate shape to create a hanging shape. The material used for this purpose was supple and familiar Bisu paper with shellfish powder and white clay as a filler, and a new paste made in the cold season was put in a jar as an adhesive and stored for 10 years in a cool and dark place. It uses "old glue", which has a weak adhesive force and makes the scroll soft. In addition, "total backing" is to reinforce the connection of each part to the one with increased backing, integrate the properties of each material, tighten the whole and strengthen, using Uda paper,
Old glue is used as an adhesive.

In this way, it may be necessary to newly remount the hanging shaft once mounted, or to change the finishing of the covering by using the frame as the hanging shaft. At that time, the one with the hand lining on the back of the skin was a wheat starch paste in which the old hanging scroll or forehead was dipped in water or water was sprayed to bond the work to the paper on the back of the skin. Swell, carefully "turning" (peeling) so as not to damage the work, and re-dress.
This work requires a very delicate and sophisticated technique, and is performed by a table technician.

[0005] In recent years, "mechanical type" surface mounts have been widely used in which a backing paper is laminated with a hot melt adhesive such as EVA (hereinafter referred to as "HM") and the work is backed by a large hot press machine. . In the case of re-applying the "mechanical striking" type of cover material, it is necessary to peel the work from the backing paper in order to bring the work into a state before backing. However, when the work is written on calligraphy paper or picture paper, it is very easy to tear. For that purpose, it is necessary to "turn over" and peel off the work, using a chemical that dissolves or swells the HM at room temperature and with extreme care. Even if the work can be peeled off without being damaged, the work may cause discoloration or blurring of the work.

Therefore, it has been proposed to use water-soluble HM as an adhesive that dissolves without depending on chemicals. This water-soluble H
M is a "mechanical type" that can be easily dressed, and can be easily peeled off from the work by humidifying or adding water, but if the work is placed in the rainy season or in a humid place, Problems such as peeling and leaching of resin (glue) into the work cause stains on the work.

It is also conceivable to utilize the peeling phenomenon due to the breakage of the internal fiber bond of the backing paper to peel off the adhesive layer and a part of the backing paper layer on the work side. However, the current backing paper requires delicate and careful attention so as not to damage the work when peeling between layers, and even if it can be completely peeled off, the thickness of the paper layer may appear. It interferes with the following covers.

[0008] On the other hand, in the rewalling work of the wallpaper, when the old wallpaper is peeled off and the new wallpaper is pasted, the old paper can be easily and neatly peeled off, and the pretreatment of the base (wall etc.) can be performed smoothly. In the meantime, means for improving the releasability of wallpaper backing paper have been proposed.

As a means for peeling wallpaper, there are basically dry and wet methods.

As a method of peeling by dry method, there is a method in which the backing paper itself can be peeled by internal destruction.
No. 2-21407, JP-A No. 1-249438, JP-A No. 10-310999, and JP-A No. 52-3.
No. 7814, No. 52-37935, No. 55-98999, No. 6-73700, No. 55-40854, No. 4-108.
No. 200, etc. Further, as another means for peeling by dry method, it is known that the backing paper is made into a multi-layered sheet containing a layer having good peelability.
Publication, Japanese Utility Model Publication No. 55-13042, Japanese Utility Model Publication No. 63-
No. 60500, Japanese Patent Application Laid-Open No. 4-8300, Japanese Patent Application Laid-Open No. 4-91300 and the like. For example, Japanese Patent Application Laid-Open No. 52-21407 discloses that a mixture of a fatty acid metal salt having a melting point of 140 ° C. or higher and a water-soluble binder is applied and dried on the back surface of the wallpaper. As a result, the penetration of the adhesive for sticking to the wall surface is suppressed, the internal bonding force of the paper layer is maintained as designed, and the paper layer is destroyed, that is, peeling due to cohesive failure is performed. However, the peeling force is large because the peeling is performed by the dry method while causing the paper layer of the wallpaper to be destroyed. Therefore, there is a drawback in that the peeling force is too strong to apply to the one with Kakusen paper or the like on the surface and the work is likely to be damaged. Further, in JP-A-55-6591, a wallpaper base paper in which a multilayered filter has two or three layers and an adhesive layer containing 50 to 90% of a polyolefin (PO) fiber in a wall side layer thereof is provided, A wallpaper base paper in which PO fibers are fused together is disclosed. This is this PO
By improving the peelability by weakening the adhesive force between the wall and the wallpaper by facilitating the penetration of the adhesive by the fiber layer and facilitating the interface destruction between the wallpaper and the adhesive layer in a dry state. Is. As described above, in the case of wallpaper, since the wallpaper is attached to a strong structure such as a wall, it is technically possible to peel it off by dry method, but when applying it to the cover paper, especially when applying it to the hanging scroll. Since it is repeatedly wound and spread many times during use, there is a high possibility that the adhesive and the PO fiber layer will separate during use, which is unsuitable. Further, in peeling by a dry method, it is necessary to weaken the internal bonding force of the paper layer of the backing paper without depending on water, and it is disclosed in JP-A-57-2.
No. 05597, Japanese Patent Application Laid-Open No. 5-125700, Japanese Patent Application Laid-Open No. 5-125699 and the like. However, any of the peeling methods, if used for wallpaper, is a rabbit, and if applied to front and backing paper, the peeling force is too strong and the backed work may be damaged.

As one of the dry-type peeling methods, Japanese Unexamined Patent Publication No.
-300800 proposes a heat peeling method by providing a heat sensitive peeling layer. The mechanical backing method in the cover is a heat fusion bonding method using HM resin, so it seems that it can be peeled off by heating the HM resin, but the quality of the work is weak because the work is written on Kakusen paper etc. This method is not suitable for peeling the cover because it is easy to tear and the work deforms when pulled and peeled.

Further, the wet peeling is to improve the peelability by watering the backing paper to weaken the internal binding force of the paper layer or to swell and soften the aqueous binder. For example, in JP-A-4-73299 and JP-A-4-73300, in a synthetic resin wallpaper, water or water mixed with a surfactant can be added to the backing paper from the surface of the synthetic resin layer. It was devised to expose the backing paper to the surface. However,
In the case of the cover, since the work is written on Kakusen paper etc. instead of the vinyl chloride sheet, it is originally water-permeable and moisture-permeable, so there is no need to make such special measures. As such, it is the original working method of refurbishment. However, the work of re-applying works drawn with ink and watercolor on weak materials such as calligraphy half-paper and picture-sensing paper,
There are problems that require high skill and time.

[0013]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in peeling a backing paper, which can be easily peeled by a dry method or a semi-wet method without damaging the work. Provided is a heat-adhesive backing paper which can be suitably re-applied.

[0014]

SUMMARY OF THE INVENTION The present invention is a multi-layered backing paper having a first layer in contact with a work having a hot-melt adhesive layer on one side, wherein at least one layer of each layer of the multi-layered web is provided. It has a function of facilitating delamination, that is, a function of causing interface destruction between layers.

The first method for imparting the function of facilitating delamination between at least one layer is to interfacially bond the two specific layers rather than the internal bonding force of the paper constituting the two specific layers. By weakening the force, the interface is set as a peeling site due to preset interface destruction. In order to form the peeled site on the interface, the composition of the material between the layers is adjusted to control the binding affinity at the interface.

Similarly, a second method for imparting a function of facilitating delamination between at least one layer is to use a specific two-layer structure in order to make a delamination site between two specific two layers a specific delamination site. Adhesive layer controlled to have a weaker internal cohesion than that of the paper, i.e.,
The purpose is to provide a peeling layer due to cohesive failure.

The multi-layered backing paper of the present invention may be provided with a third layer depending on the application, in addition to the second layer for performing delamination between the work and the first layer in contact with the work.

This third layer is formed by adding the same material as the first layer or another material when the thickness of the backing paper is insufficient.
Also, when peeling is performed by cohesive failure of the adhesive layer, the third layer is always necessary because it is the layer on the peeled side. The material may be the same as that of the first layer.

When the multilayer backing paper of the present invention is applied to a wallpaper, the work to be backed is a wallpaper having a simple peeling layer in which the decorative layer of the wallpaper and the backing paper are integrated, To apply, apply starch paste or vinyl acetate-based water-based adhesive that is usually used on the back of the wallpaper.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The adhesive layer provided on the first layer of paper is a thermoplastic resin, so-called HM, and specifically, ethylene-vinyl acetate copolymer resin (EVA), ethylene-ethyl acrylate copolymer (EAA). ), A polyolefin-based resin, a polyamide-based resin, a polyester-based resin, an ionomer resin, a vinyl chloride copolymer resin, or a derivative thereof, depending on the application.

As a method for providing an adhesive layer, an emulsion of the above resin is applied by a gravure coater or the like, a resin obtained by heating and melting the above resin is applied by a roll coater or a bar coater, or an extrusion method is used for T dice. More extruded laminating method, extruded from the pores of the injection nozzle or the like to stick fibrous or monofilament resin as a spunbond sheet, a method of adhering the resin film with an adhesive or heating, the resin The powder is selected from the usual methods such as a method of applying the powder to the first layer and then heating and melting it for adhesion, and a method of heating and melting the above resin and applying it with a dot coater.

The thickness of the adhesive layer varies depending on the processing method, but is generally set in the range of 4 to 50 g / m ² .
For example, when EVA resin is selected as the adhesive and extrusion lamination is performed through a T-die by the extrusion method, 14 to 47 g / m ² and the resin thickness is 15 to 50 μm.
m, preferably 17 to 40 μm.

The melting point of the HM resin as an adhesive is 70 to
120 ° C, preferably 80 to 100 ° C. If the temperature is lower than 70 ° C, the work may be deformed during storage.
At a processing temperature above 0 ° C, works written on silk, such as silk books, turn yellow, which is not good. However, when selecting vinyl chloride copolymer resin for wallpaper, the melting point is 100-170 ° C.
Becomes

The material of the first layer of the backing paper according to the present invention is H
A material having a good affinity with M and having a basis weight and a density such that the adhesive does not pass through and penetrate into the second layer is selected.

Taking the case of a film EVA in which the HM layer is extruded and laminated from a T-die, the surface tension is low during heating and melting. Since the first layer is a so-called paper in which fibers are laminated, the surface has innumerable small holes and gaps, and since the adhesive enters the holes and gaps and solidifies like a root, The adhesive force of the adhesive layer becomes strong. Therefore, the material of the first layer of paper can be chosen relatively freely.

When many hydrophilic materials are selected as the material for the paper of the first layer, so-called pulp, that is, wood pulp such as softwood and hardwood, waste paper pulp, bast fibers such as prunus and hemp, straw, ... Contains non-wood fibers such as bagasse and kenaf. Then, in order to strengthen the internal binding force of the paper, other fibers may be added in some cases. Examples thereof include hydrophilic fibers such as rayon, fibrous or powdery polyvinyl alcohol (PVA) as a binder thereof,
There are vinylon fiber, acrylic fiber, etc., which have an affinity for the binder. In addition, hydrophobic main synthetic fibers such as polyolefin, polyester, nylon, polyvinyl chloride, vinylidene chloride, aramid-based, polyarylate-based, polyimide-based (hydrophobic to maintain the shape before heating without melting during heating and drying in papermaking) Synthetic fiber) and a hydrophobic binder synthetic fiber (hydrophobic synthetic fiber that deforms and melts the shape before heating during heating and drying in papermaking to exhibit adhesiveness). Furthermore, in addition to the above raw materials, glass fiber, micro glass, rock wool, mineral wool, alumina fiber, alumina silica fiber, mullite fiber, boric acid fiber, quartz fiber, silicate glass fiber, fused silica fiber, potassium titanate fiber. Inorganic fibers such as zirconia fiber, calcium sulfate, phosphate fiber, boron silicate fiber, carbon fiber and activated carbon fiber may be blended.

The first layer of paper contains shellfish powder, clay, wax, kaolin, sepiolite, sericite, talc, zeolite, calcium carbonate, titanium dioxide, aluminum hydroxide, alumina, silica, depending on the application. You may mix various fillers, such as magnesia.

Further, as a paper strengthening agent, a water-soluble urea resin,
Melamine resin, cationized starch, CMC (carboxymethyl cellulose), polyamide polyamine epichlorohydrin resin, polyimine resin, water-soluble acrylic resin, polymer resin emulsion such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose and latex may be added.

Further, as a sizing agent, a maleic acid type,
A rosin-based sizing agent, a petroleum resin sizing agent, a wax sizing agent, a reactive sizing agent such as an alkyl ketene dimer, or a neutral sizing agent may be used. Further, it is also possible to use a papermaking auxiliary which is usually used at the time of papermaking, such as a yield improving agent for various raw materials, a fixing agent, and a dispersant.

[0030]

EXAMPLES Example 1 A first example of using backing paper as a frame is shown. In order to peel as easily as possible by the dry method, the first layer and the second layer
As a means for minimizing the interfacial bonding force between layers, when the first layer paper is made of 100% pulp, the second layer is made of a material that does not contain pulp. As a result, there is no entanglement of fibers between the first layer and the second layer, and no hydrogen bond in the pulp during the laminating, and the interfacial bonding force between the two layers is only weak adhesion with poor affinity due to the hydrophobic binder fiber. become.

The first layer is made of 100% wood pulp, or 5% to 50% of hydrophilic fibers such as rayon having no self-adhesive property, the above inorganic fibers and the above inorganic filler are replaced in place of the pulp, and the internal bond strength is increased accordingly. 1 to 10%, preferably 2 to 5% of a binder such as PVA and the above paper strength enhancer are blended in order to prevent the falling of the paper.

The grammage of the first layer is the layer that remains on the work side when the work is peeled off for re-dressing, and the grammage is appropriate for the thickness of the backing paper in the axial wear. That is, the basis weight is 5 to 50
g / ^{m 2,} preferably 10 to 50 g / ^{m 2.} Second
The layer has a ratio of the polyester main fiber of the hydrophobic fiber and the polyester binder fiber (including the core-sheath structure) of 90 to 6
0%: 10-40%, preferably 80-60%: 20-
Blend in the range of 40%.

The polyester fibrous binder has good affinity for adhesion to polyester and acrylic fibers, but has poor affinity for adhesion to hydrophilic fibers such as pulp and rayon and polyolefin fibers. As a result, the interfacial bonding force between the two layers is not so strong as to hinder peeling. Furthermore, in order to increase the opacity of the second layer, the inorganic filler is added in an amount of 5 to 50
% May be included. In that case, in order to prevent the internal binding force from decreasing by that much, a binder or the above-mentioned paper strengthening agent is added to
The amount may be increased by 10 to 10%, preferably 2 to 5%. In this case, be careful not to increase the interfacial bonding force between the two layers too much. Further, in order to control the interfacial bonding force between the first and second layers, a small amount of pulp or PVA having an adhesive affinity for the first layer may be blended in the second layer.

The grammage of the second layer is preferably such that when it is attached to the forehead, the pattern of a crack (decrease) that decorates the frame edge is not visible through the work. The total basis weight of the first layer and the second layer is 80 to 120 g / m ² , and the total weight of the second layer is 30 to 120 g / m ² .
115 g / ^{m 2,} preferably 40~110g / ^{m 2.} The basis weight of the second layer is 5 to 50 g / m for cost reduction.
^In the case of ² , the third layer may be provided with the same material as the first layer for supplementing the basis weight.

The basis weight of the third layer is 5 to 110 g / m ² , preferably 10 to 100 g / m ² . Further, in order to enhance the interfacial bond strength between the second and third layers, the hydrophobic binder fiber and the fiber having good adhesive affinity are 5 to 50%, preferably 5%.
It may be mixed up to 20%.

FIG. 1 shows an example of a frame frame in which the backing paper of the present invention is applied to a frame B to which the work A is attached. FIG. 2 shows I of FIG.
The structure of the backing paper 10 applied by the cross section along the line I-II is shown on the left side, and the right side shows the state of peeling. It should be understood that the cross-sections of the following embodiments do not necessarily show the actual size or the relationship of the actual size, but are exaggerated for convenience of explanation. Backing paper 1 according to this embodiment
0 has a first layer designated as 1, a second layer designated as 2, a third layer designated as 3. The composition of each layer is shown below.

First layer Hydrophilic fiber Pulp 98% Hydrophilic binder fiber PVA 2% Second layer Hydrophobic main synthetic fiber Polyester 62% Hydrophobic binder fiber Polyester 35% Hydrophilic binder fiber PVA 3% Third layer Hydrophilic Fiber Pulp 88% Hydrophilic Binder Fiber PVA 2% Hydrophobic Main Synthetic Fiber Polyester 10% The first layer and the second layer are made with a basis weight of 25 g / m ² and the third layer at 70 g / m ² , respectively. EVA on one layer (melting point 84
Layer 4 (° C, MFR 35 g / 10 min) was laminated to a thickness of 20 μm to obtain a multi-layer backing paper 10. The backing paper 10 was used to bond the work A written on Kakusen paper using a hot press machine at 100 ° C. for 10 seconds. Further, a thick aqueous glue layer 5 was applied to the periphery of the back side of the lined work, and sprayed on to the forehead B on which the fissure was applied to finish.

After one week, a nail was put under the HM layer in the corner of the work to make a gap between the first layer and the second layer, and the corner of the work was grasped and pulled by a finger, as shown in FIG. As shown on the right side, the work A smoothly peeled off from the second layer 2 together with the HM layer 4 and the first layer 1. The peeling surface on the work A side is dirty,
There was no damage or deformation, and it was ready for re-mounting.

Example 2 This example, like Example 1, shows a second example in which a backing paper is used as a frame, and peeling is performed as easily as possible by a dry method, and the interfacial bonding force between the first layer and the second layer is removed. An example in which the first layer does not contain pulp is shown as a means for minimizing the above. First
The layer comprises 90-60% of hydrophobic main fibers, 10-40% of hydrophobic binder fibers, and preferably 80-80% main fibers.
60% and 20 to 40% binder fiber. When the binder fiber is less than 10%, the internal bonding force of the second layer becomes weak, and when it exceeds 40%, the interfacial bonding force between the two layers becomes strong and peeling becomes difficult. In order to improve the adhesive performance of the adhesive layer with the HM resin, for example, PO fiber having a good affinity with EVA,
A part of PET fiber may be replaced. However, as described in JP-A-55-6591, the fact that 50% or more of PO fibers are mixed and that the PO fibers are fused with each other functions as a binder,
Moreover, since the adhesive affinity with hydrophilic fibers such as pulp is also good, the interfacial bonding force with the second layer becomes strong, which is not good.
In order to improve the adhesive affinity with the EVA resin, it is sufficient that the PO fiber content is 20% at maximum. Also, this P
O fibers also have a relatively good adhesive affinity with pulp,
It also contributes to increase the interfacial bonding force between the first and second layers. Furthermore,
In order to increase the opacity of the first layer, the inorganic filler is added in an amount of 5 to 5
It may be blended with 0%. In that case, in order to prevent the internal binding force from being reduced by that amount, the binder and the paper strength enhancer may be added in an amount of 1 to 10%, preferably 2 to 5%. In this case, be careful not to strengthen the interfacial bonding force between the two layers. In this case, the grammage of the first layer is such that the adhesive does not come off, and the thickness just hits the inside of the work when the work is peeled off, that is, 5 to 50 g / m ² , and preferably 1
0 to 50 g / m ² is suitable. As in this example,
The material of the second layer when the first layer does not contain pulp is
The composition of the first layer when the material of the layer is 100% pulp can be applied. Specifically, as the second layer, wood pulp 1
00%, or hydrophilic fibers such as rayon having no self-adhesive property instead of pulp, the above inorganic fibers, and 5 to 50% of the above inorganic fillers for increasing the opacity of the second layer.
%, And a binder such as PVA or the above paper-strengthening agent is added in an amount of 1 to 10 in order to prevent the internal binding force from being reduced accordingly.
%, Preferably 2 to 8%. Moreover, you may use the above-mentioned sizing agent. The basis weight of this second layer is 30-11.
5 g / ^{m 2,} preferably 30~110g / ^{m 2.}

FIG. 3 shows a second embodiment 20 in which the backing paper of the present invention is used as a frame and its peeling state. The compositions of the first layer 1 and the second layer 2 shown in the figure are shown below.

First Layer Hydrophobic Main Synthetic Fiber 65% Polyester Hydrophobic Binder Fiber 25% Polyester PO Fiber SWP 10% Second Layer Hydrophilic Fiber Pulp 98% Hydrophilic Binder Fiber PVA 2% With the above composition, the first layer 1 was paper-made at a basis weight of 25 g / m ² and the second layer 2 was made at 90 g / m ² , and EVA (melting point 82) was applied on the first layer.
Layer 4 (° C, MFR 35 g / 10 min) was laminated to a thickness of 20 μm to obtain a multi-layer backing paper 20. With this backing paper, the work A written on Kakusen paper was pasted with a hot press machine at 100 ° C. for 10 seconds. Further, a layer 5 of a thick aqueous glue was applied to the periphery of the back side of the lined work, which was sprayed on and pasted on the cracked frame to complete the frame. One week later, when a nail was put under the HM resin adhesive layer in the corner of the work to make a gap between the first layer and the second layer, the corner of the work was grasped and pulled with fingers. In the state shown in (1), it peeled off smoothly in the same state as in Example 1.

Example 3 This example shows a third example in which the backing paper is used for frame. This example is a dry method, and in order to make peeling as easy as possible, between the two layers, each layer (first layer and third layer) is used.
An example in which an adhesive layer (second layer) weaker than the internal bond strength of the paper of (layer) is provided and peeling due to cohesive failure of this adhesive layer is possible is shown. The first and third layers can be 100% pulp. Then, the material containing 100% pulp of the first layer used in Example 1 can be applied.

Furthermore, by providing the adhesive layer of the second layer between the layers of the backing paper, there is no entanglement of the fibers at the interface due to the kneading between the first layer and the third layer, and the pulp at the interface between the two layers is formed. Design to limit hydrogen bonding.

In the second adhesive layer, the blending ratio of the filler and the paper strengthening agent is 80 to 100%: 20 to 0%, preferably 90 to 100%: 10 to 0%. Further, pulp or fibrous PVA or a commonly used papermaking auxiliary may be appropriately used to assist the formation of the second layer during papermaking. As a method of forming the adhesive layer of the second layer, in addition to the paper making method, it may be applied by a dry method or a wet method between the first layer and the second layer of wet paper at the time of paper making. The basis weight of the second layer should be as small as possible. In this case, the paper-strengthening agent must have such a thickness that the wet paper does not cause delamination during papermaking, and does not cause delamination during transportation / processing after drying. That is, the basis weight is 1 to 20 g / m ² , and preferably 3 to 15 g / m ² .

FIG. 4 shows a third embodiment 30 using the backing paper of the present invention as a frame. The compositions of the first layer 1, the second layer 2 and the third layer 3 are shown below.

The composition of each layer is shown below.

First layer Hydrophilic fiber Pulp 78% Hydrophilic fiber Rayon 20% Hydrophilic binder fiber PVA 2% Second layer Filler White clay 88% Paper strength enhancer Starch 2% Hydrophilic fiber Pulp 10% Third layer Hydrophilic Fiber Pulp 78% Hydrophilic fiber Rayon 20% Hydrophilic binder fiber PVA 2% With the above composition, the first layer has a basis weight of 25 g / m ² , and the second layer has 12
g / m ² , the third layer was papermaking at 70 g / m ² , and the layer 4 of EVA (melting point 82 ° C., MFR 35 g / 10 min) on the first layer 4
Is laminated to a thickness of 20 μm, and multi-layered backing paper 3
I got 0. With this backing paper, the works written on Kakusen paper were pasted together at 100 ° C. for 10 seconds with a hot press machine. Further, a thick aqueous glue 5 was applied to the periphery of the back side of the lined work, which was sprayed and pasted on the forehead B on which the fissure was applied. One week later, when a nail was put under the HM resin adhesive layer in the corner of the work to make a gap between the first layer and the second layer, the corner of the work was grasped and pulled with fingers, as shown in FIG. In the state, the work A peeled off from the forehead B smoothly.

Example 4 An example in which the backing paper of the present invention is applied to the hanging shaft C shown in FIG. As a means of minimizing the interfacial bonding force between the first and second layers by peeling as dry as possible, weaken the interfacial bonding force between layers rather than the internal bonding force of the first and second layers of backing paper. An example in which the affinity of the interfacial bond between the two layers is controlled in the composition of the materials between the respective layers so as to form the preset peeling site will be shown. For peeling that can be easily peeled by a dry method, such as a hanging scroll, which is repeatedly wrapped and unrolled many times during use to bend the pasting layer for a long time of more than 10 years, peeling during use Is likely to be inappropriate. Interfacial peeling is difficult with the dry method,
If water is lightly added to the interface, the hydrophilic fibers such as pulp at the interface on the pulp-rich side will swell and deform, and by further loosening hydrogen bonds at the interface, it will be possible to easily separate the interface. .

That is, when the backing paper of the present invention is applied for axial mounting, it is suitable to design the semi-wet peeling type. In short, in the dry state, there is not much difference between the intra-layer bonding force and the interfacial bonding force of the backing paper, but if the backing paper is slightly moistened,
Design so that the interfacial bond strength becomes extremely small and the interfacial peeling becomes easy.

When a large amount of hydrophilic fiber is mixed in the first layer, the pulp 100 is used as the material for the first layer of the above-mentioned backing paper for frame.
% According to the formulation when blended. When the first layer is made of 50 to 100% pulp, the material of the second layer is made to be 20 to 0% and the entanglement of the fibers between the layers is small because of the kneading, but the pulp at the interface between the two layers is small. The number of hydrogen bonds is also larger than that of the frame backing paper, and further, in order to enhance the affinity of the interfacial bond between the layers due to the hydrophobic binder fiber, 5 to 20% of the hydrophobic fiber may be blended also in the first layer.
Further, in order to enhance the affinity of interfacial bonding between the layers due to the hydrophilic binder fiber (PVA, etc.), the second layer may also contain a hydrophilic binder in an amount of 1 to 20%, preferably 1 to 10%.

FIG. 6 shows an embodiment 40 of the backing paper of the present invention applied to shaft mounting by the cross section taken along line VI-VI of the hanging shaft shown in FIG. This backing paper 40 is the first layer of paper material 1
And the second layer of paper material 2 and the EVA layer 4 on the first layer.

The composition of each layer is shown below.

1st layer Hydrophilic fiber Pulp 85% Hydrophilic binder fiber PVA 5% Hydrophobic main synthetic fiber 10% Polyester Second layer Hydrophilic fiber Pulp 10% Hydrophilic binder fiber PVA 5% Hydrophobic main synthetic fiber Polyester 50% Hydrophobic Binder Fiber 35% Polyester This composition was paper-made with a basis weight of 25 g / m ² for the first layer 1 and the second layer 2, respectively, and EVA (melting point 82) was applied on the first layer.
Layer 4 (20 ° C., MFR 35 g / 10 min) was laminated to 20 μm to obtain a multi-layer backing paper 40. This backing paper 4
0, work A written on the picture paper is 10
The pieces were laminated at 0 ° C for 5 seconds. Further, the lined work A was sandwiched with a HM resin film 5 on a temporary winding (a hanging scroll on which the work is not mounted), and was attached by a hot press machine to finish the hanging scroll C. The hanging scroll was wound or unfolded 100 times, but the inconvenience such as peeling and swelling did not occur in the work A. When reattaching the work A of this hanging scroll, lightly moisten it from the front and back with a spray, wait for about 3 minutes until the moisture reaches the interface scheduled for peeling and becomes familiar, and under the HM resin adhesive layer in the corner of the work. When a nail was put on the side to make a gap and the corner of the work was grasped and pulled with fingers, the work did not damage the surface work at all, just like the case of the frame, and it was peeled off smoothly enough to be re-dressed. It was

Example 5 Similar to Example 4, the backing paper of the present invention is applied to the hanging scroll, and the first layer is made of a material having less hydrophilic fibers such as pulp and the second layer is made hydrophilic. An example in which a large amount of the functional fiber is mixed will be shown. The material for the first layer of the backing paper on which the HM resin adhesive layer is provided was in this case in accordance with the procedure of 0% pulp for frame loading.

When the second layer is made of 50 to 100% pulp, the material of the first layer is made to be 20 to 0% of pulp, and the entanglement of the fibers between the layers is small because of the kneading, but the pulp at the interface between the two layers is small. The number of hydrogen bonds is also greater than that of the backing paper for frame, and further, in order to enhance the affinity of the interfacial bond between the layers due to the hydrophobic binder fiber, the hydrophobic fiber is also added to the second layer by 5 to 5.
20% may be added. Furthermore, in order to enhance the affinity of interfacial bonding between the layers due to the hydrophilic binder fiber (PVA, etc.), the first layer also contains 1 to 20%, preferably 1 to 10% of a hydrophilic binder. Then, in order to enhance the adhesive performance of the adhesive layer with the HM resin, for example, the PO fiber having a good affinity with EVA and a part of the PET fiber may be replaced with each other. However, as described in JP-A-55-6591, PO fibers are blended in an amount of 50% or more,
The fact that the PO fibers are fused to each other functions as a binder and has a good adhesive affinity with hydrophilic fibers such as pulp, so that the interfacial bonding force with the second layer becomes strong, which is not good. In order to improve the adhesive affinity with the EVA resin, it is sufficient that the PO fiber content is 20% at maximum.

Further, in order to increase the opacity of the first layer, the inorganic filler may be blended in an amount of 5 to 50%. In that case, in order to prevent the internal binding force from being lowered by that amount, the binder and the above paper-strengthening agent are added in an amount of 1 to 10%, preferably 2 to 5%. In this case, a binder such as PVA or a paper strengthening agent that strengthens the interfacial bonding force between the two layers in a dry manner and absorbs water to swell and soften when the water is given to weaken the interfacial bonding force is used. You can choose from paper strength enhancers.

In this case, the grammage of the first layer is from a thickness such that the glue does not come off, to a thickness such that when the work is peeled off, it is about 5 to 50 g / m ² , preferably about 5 to 50 g / m ² . 10
-50 g / m ² is suitable.

FIG. 7 shows a sectional structure of a backing paper 50 axially mounted according to this embodiment. The compounding compositions of the first layer 1 and the second layer 2 are shown respectively.

First layer Hydrophilic fiber Pulp 10% Hydrophilic binder fiber PVA 5% Hydrophobic main synthetic fiber Polyester 50% Hydrophobic binder fiber Polyester 25% Polyethylene fiber SWP 10% Second layer Hydrophilic fiber Pulp 85% Hydrophilic Binder fiber PVA 5% Hydrophobic main synthetic fiber polyester 10% With the above composition, the first layer has a basis weight of 25 g / m ² , and the second layer has 20%.
Paper is made at g / m ² and EVA (melting point 82 ° C., M
(FR 35 g / 10 min) Layer 4 was laminated to a thickness of 20 μm to obtain a multi-layer backing paper 50. With this backing paper, work A written on Kakusen paper is hot-pressed for 10
The pieces were laminated at 0 ° C for 5 seconds. Furthermore, as in Example 4,
The lined work A was tentatively wrapped with the HM resin film 5 and attached by a hot press machine to finish the hanging scroll C. The hanging scroll was wound or unfolded 100 times, but the inconvenience such as peeling and swelling did not occur in the work A. This hanging scroll work A
When re-covering, lightly humidify from the front and back with a spray, wait for about 3 minutes until the moisture reaches the interface to be peeled off and adjusts, then put eye nails under the HM resin adhesive layer in the corner of the work. When a gap was created and a corner of the work was grasped and pulled with a finger, the work peeled off smoothly without any damage to the surface work, as in Example 4.

Example 6 An example is shown in which the backing paper of the present invention is similarly applied to the shaft mounting so that the dry type has a strong interfacial bonding force but is easily peeled off when humidified.

Between each layer (the first layer and the third layer), an adhesive layer controlled to be weaker than the internal bonding force of the paper.
By providing the (second layer), peeling due to cohesive failure of the adhesive layer is made possible.

The first layer and the third layer can be 100% pulp. Then, by providing the adhesive layer of the second layer between the layers of the backing paper, there is no entanglement of fibers at the interface due to the bonding between the first layer and the third layer, and hydrogen bonding of pulp at the interface between the two layers is achieved. Design to be limited by incorporating fillers. Further, pulp or fibrous PVA or the above-mentioned commonly used papermaking aids may be appropriately used to assist the formation of the second layer during papermaking.

The second layer of controlled adhesive layer is
In this case, the compounding ratio of the above-mentioned filler, the above paper-strengthening agent and the above-mentioned fiber is set to 50-80%: 50-0%: 50-20%. As the method for forming the second layer, in addition to the paper making method, it is also possible to apply a dry method or a wet method between the wet paper of the first layer and the wet paper of the second layer during the paper making. In the case of spray application, the fiber content is removed, and the hydrophilic paper strength enhancer is increased by that amount and applied.

The basis weight of the second layer should be as small as possible. In this case, the paper-strengthening agent should be such that the wet paper does not cause delamination during papermaking, and that it is transported and
The thickness must be such that delamination does not occur during processing. In this case, the paper-strengthening agent should be such that the wet paper does not cause delamination during papermaking, and that it is transported and
The thickness must be such that delamination does not occur during processing. Its basis weight is from 1 to 20 g / m ² , preferably 3
Is about 15 g / m ² .

FIG. 8 shows a cross-sectional structure of a backing paper 60 in which the backing paper of the present invention is axially mounted. The compounding compositions of the paper materials of the first layer 1, the second layer 2 and the third layer 3 are shown respectively.

First layer Hydrophilic fiber Pulp 78% Hydrophilic fiber Rayon 20% Hydrophilic binder fiber PVA 2% Second layer Filler White clay 63% Paper strength enhancer Starch 2% Hydrophilic fiber Pulp 30% Hydrophilic binder fiber PVA 5% Third layer Hydrophilic fiber Pulp 78% Hydrophilic fiber Rayon 20% Hydrophilic binder fiber PVA 2% With the above composition, the first layer has a basis weight of 20 g / m ² , and the second layer has 15
g / m ² , the third layer was made at 15 g / m ² , EVA (melting point 82 ° C., MFR 35 g / 10 min) layer 4 was laminated on the first layer to a thickness of 20 μm, and multi-layer backing paper 60
Got Using this backing paper 60, works written on Kakusen paper were pasted together at 100 ° C. for 5 seconds with a hot press machine.
Further, in the same manner as in Example 4, the backed work A was temporarily wound, the HM resin film 5 was sandwiched, and the work A was attached by a hot press machine to finish the hanging shaft C. The hanging scroll was wound or unfolded 100 times, but no inconvenience such as peeling or swelling occurred in the pasted work. Lightly moisten the scroll from the front and back with a spray, wait for about 3 minutes until the moisture reaches the interface to be peeled off and adjusts, then put a nail in the corner of the work under the HM resin adhesive layer. When a gap was created and a corner of the work was grasped and pulled with fingers, the work smoothly peeled off in the state shown in FIG.

Example 7 An example in which the backing paper of the present invention is applied to a wallpaper will be described. This is an example in which a means for minimizing the interfacial bonding force between the first layer and the second layer is adopted in order to peel as easily as possible by a dry method. In the case of wallpaper, the work replaces the so-called decorative layer of the wallpaper, and the backing paper and the decorative layer are integrated, that is, the wallpaper has a simple peeling layer. Apply and paste the starch paste or vinyl acetate-based water-based adhesive used. For the adhesive layer provided on the first layer of the backing paper for wallpaper, a material having a good adhesive affinity with the material of the decorative layer was selected, and the wallpaper was peeled by the dry peeling method.

As the compounding material for the backing paper, an intermediate compounding of the material mixing of the dry peeling method for frame mounting in the surface mounting and the semi-wet peeling method for shaft mounting can be applied. Further, the adhesive used for sticking to the wall surface may be subjected to the treatment described in JP-A-55-40854 so as not to penetrate the planned peeling site and prevent the peeling.

When a large amount of hydrophilic fibers are mixed in the first layer,
According to the formulation when 100% of pulp is blended with the material for the first layer of the above-mentioned backing paper for frame. The first layer contains 50 to 1 of pulp
When it is set to 00%, the material of the second layer is 10 to 0% of pulp.
Since there is less entanglement of the fibers between the layers due to the kneading, the hydrogen bond of the pulp at the interface between the two layers is more than that of the frame-backing paper, but it is less than that of the shaft-lining backing paper.
The first layer may also contain 5 to 10% of hydrophobic fibers in order to increase the adhesive affinity of the interfacial bond between the hydrophobic binder fibers. Furthermore, hydrophilic binder fiber (PV
In order to enhance the affinity of interfacial bonding between layers due to (A etc.), the second layer also contains a hydrophilic binder in an amount of 1 to 10%, preferably 1%.
Add ~ 8%.

FIG. 9 shows a sectional structure of a backing paper 70 of Example 7 in which the backing paper of the present invention is applied to a wallpaper.

The following formulation was used for each layer shown in FIG.

First layer hydrophilic fiber pulp 85% hydrophilic binder fiber PVA 5% hydrophobic main synthetic fiber polyester 0% second layer hydrophilic fiber pulp 10% hydrophilic binder fiber PVA 5% hydrophobic main synthetic fiber Polyester 50% Hydrophobic binder fiber Polyester 35% With the above composition, the first layer 1 has a basis weight of 100 g / m ² , a second layer 2
At 20 g / m ² and a vinyl chloride resin layer 4 is coated on the first layer to obtain a backing paper 70, on which a decorative layer A is formed through vinyl chloride lamination, printing, foaming and embossing steps. Got a PVC wallpaper.

This wallpaper was attached to the wall surface (veneer board) D with the adhesive 5 for the wallpaper, and after one week, the corners of the wallpaper were turned with the eye nails and pulled with the finger, and the planned first layer was obtained. Second
The interface of the layers was destroyed, and the surface of the second layer in contact with the adhesive layer 5 appeared on the wall surface, and the layers could be peeled off neatly.

As described above, the embodiments of the present invention are
Although it is shown separately for wall mounting, each is for each purpose
By way of example, the invention is not limited to these examples.

[0075]

The backing paper of the present invention has the following effects.

1. Original re-dressing requires only a high degree of technology to peel off the work by immersing it in water because the material of the work is very fragile with calligraphy paper because it peels off only the work. However, in the present invention, since the adhesive layer in contact with the work and the first layer of the backing paper are peeled off while being left on the work side, the work is reinforced, and the work can be performed in a dry or semi-wet manner. Therefore, it can be easily and neatly peeled off.

2. In the case of axial mounting, the work is firmly attached to the backing paper during use, and it does not swell or peel off due to adhesion failure.

3. The adhesive that lines the work is hydrophobic HM
Since it is a resin adhesive, the work does not get dirty due to leaching of the adhesive to the surface.

4. Even if you are not a special technician such as a table technician, you can relatively easily "remove" (peel) the work without damaging the work.

5. Since the peeling work for re-dressing is dry or semi-wet, it does not stain or damage the work.

6. When changing the frame to the frame,
If the first layer of the backing paper is designed to have the thickness of the back of the skin, the peeled work can be proceeded as if the back of the work is the back of the skin, and the process can be shortened.

7. When applied to wallpaper, it can be easily peeled from the wall and does not damage the wall.

8. It is convenient for re-covering or re-covering if a mark or a mark indicating that it is a front cover or a wall cover finished with this backing paper is displayed in a small corner on the front surface or on the back surface.

[Brief description of drawings]

FIG. 1 shows an example of a frame using the backing paper of the present invention as a frame.

FIG. 2 shows an example of a backing paper viewed from a line II-II shown in FIG. 1 by a cross section.

FIG. 3 shows a second example in which the backing paper of the present invention is used as a frame.

FIG. 4 shows a third example also used as a frame.

FIG. 5 shows an example of a hanging shaft to which the backing paper of the present invention is applied.

FIG. 6 is a cross-sectional view showing an example of a backing paper for axial mounting viewed from the line VI-VI in FIG.

FIG. 7 shows a second example similarly applied to shaft mounting.

FIG. 8 shows a third example also applied to shaft mounting.

FIG. 9 shows an example in which the backing paper of the present invention is applied to wallpaper.

[Explanation of symbols]

1 1st layer 2 2nd layer 3 3rd layer 4 HM resin layer 5 Water-based glue layer, adhesive for wallpaper 10, 20, 30, 40, 50, 60, 70 Example of multi-layered backing paper of the present invention A work written on Kakusen paper or makeup layer of wallpaper B amount C hanging scroll D Wall (Veneer board)

Claims (3)

[Claims] 1. A multi-layered backing paper having a first layer in contact with a work having a hot melt adhesive layer on one side, the backing paper comprising:
A peelable backing paper having a function of causing delamination between at least one layer of each layer of the multi-layered sheet. 2. The function of facilitating delamination between at least one layer is such that the interface between two specific layers is made weaker than the internal bond of the paper constituting each layer, thereby forming the interface. The releasable backing paper according to claim 1, wherein the releasable backing paper is applied by setting the above as a preset peeling site. 3. The releasable backing paper according to claim 2, wherein the peeling portion of the interface is a peeling portion by adjusting the composition of materials between the layers.