JP2019098603A - Wall covering material - Google Patents

Abstract

To provide a wall covering material having a non-woven fabric layer which can be applied to a pasting method without impairing sound absorbency and dimensional stability.SOLUTION: There is provided a wall covering material in which at least one surface of a non-woven fabric layer is subjected to resin coat treatment for forming a resin layer partially having no film. The wall covering material in which at least one surface of the non-woven fabric layer is subjected to foam coat treatment has no laminated backing paper on any surface of the non-woven fabric layer. A preferable non-woven fabric layer is a needle punch non-woven fabric in which a card web is entangled with a needle punch.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wall covering material using a non-woven fabric.

  Wall covering material made of thin materials such as wallpaper is widely used as one of the interior materials of houses, and a non-woven fabric layer is laminated on a backing paper as a wall covering material with good sound absorption performance and design. Furthermore, a foam layer is laminated so that the non-woven fabric layer is partially exposed, and a wall covering material using a flame retardant paper is proposed as the backing paper (Patent Document 1). In addition, as a wall covering material with a further enhanced design property, there is proposed a wallpaper in which a thin film (preferably a resin film) is laminated on a non-woven fabric and a flame retardant paper is laminated on the back as a backing paper (Patent Document 2, paragraph 0016). When such a wall covering material is attached to a wall using an adhesive, in order to secure the removability of the wall covering material, the adhesive power is generally reduced when water is supplied as an adhesive, and the wall covering A starch based aqueous adhesive is used which allows the material to be peeled off the wall.

By the way, as a construction method of pasting wall covering material such as wallpaper on the wall, "non-sticking pasting method" which can be constructed even by an layman using a simple application roller without using a paste application device exclusively for wallpaper Method to apply and apply adhesive) and paste application device for exclusive use of wallpaper, and "pasting application method" (namely, coating material applied to wall covering material) which wallpaper pasting craftsman with high skill applies Methods) and the like.

Unexamined-Japanese-Patent No. 04-185778 Utility model registration No. 2561474 gazette

  When a wall covering material is applied to a wall using a starch-based water-based adhesive, the starch-based water-based adhesive causes the backing of a wall covering material such as wallpaper to be stretched, so it is inevitable to adopt a gluing method. There was a problem that it was not possible to adopt the glue paste method over there. In addition, when a starch-based aqueous adhesive is applied to a gluing method, it is necessary to provide an open time of about 30 minutes to stabilize the dimensions of the wall-coated material coated with the starch-based aqueous adhesive. There has been a problem that improvement in the work efficiency of the material can not be expected.

  Also, regardless of the construction method, in general, when the wall covering material is attached to the wall, in order to prevent peeling of the wall covering material after being applied, the backing paper and the wall surface are firmly adhered to each other. Therefore, there is a problem that part or all of the backing paper remains on the wall surface when the wall covering material is replaced. It is necessary to remove the backing paper left on this wall surface from the viewpoint of fire protection performance security and improvement of the smoothness of the base, and this removal work requires considerable labor and time, which reduces the work efficiency of the replacement work There was a problem of causing

  The object of the present invention is to solve the above-mentioned problems of the prior art, and for a wall covering material having a non-woven fabric layer excellent in sound absorption, without causing dimensional change due to pasting during wall bonding operation The purpose is to apply not only the pasting method but also the other side pasting method so as not to cause the lowering of the pasting work efficiency and the pasting work efficiency.

  The present inventors can apply the wall covering material having the non-woven fabric layer also to the pasting method without the use of the backing paper, and also the elasticity peculiar to the non-woven fabric by not using the back paper. It is found that the resin can be relaxed by discontinuously fixing the resin to the non-woven fabric, that is, by performing treatment without forming a continuous resin film (hereinafter referred to as "resin coating treatment"), and further the sound absorption of the non-woven fabric layer can be maintained. The present invention has been completed.

  That is, the present invention provides a wall covering material in which at least one surface of the non-woven fabric layer is resin-coated, and in which no backing paper is laminated on any surface of the non-woven fabric layer.

  The wall covering material of the present invention is a wall covering material in which at least one surface of the non-woven fabric layer is resin-coated and no backing paper is laminated on any surface of the non-woven fabric layer. Since the backing paper is not laminated, it can be applied to the other side pasting method, and the open time required when the backing paper is laminated becomes unnecessary. In addition, when the wall covering material is peeled off from the wall for reattachment, the wall covering material with a normal backing sheet remains on the wall surface side while the backing sheet is present in the wall covering material of the present invention. Because it does not exist, the backing paper will not remain on the wall. In addition, since the resin coating process is performed on at least one surface of the non-woven fabric layer, it is possible to suppress the stretchability that hinders the operation at the time of applying and peeling the wall covering material.

FIG. 1 is a schematic cross-sectional view of a wall covering material of the present invention. FIG. 2 is a reverberation chamber sound absorption coefficient with respect to the frequency of the wall covering material of the present invention.

  The wall covering 10 of the present invention will be described with reference to FIG. The wall covering material 10 has a structure in which resin coating processing is performed on one side of the non-woven fabric layer 1. In FIG. 1, the code | symbol 2 has shown the part (Hereafter, the resin coating process layer 2 may be called.) Of the resin-coated nonwoven fabric layer. The resin coating may be formed on both sides of the non-woven fabric layer 1.

<Non-woven fabric layer>
The nonwoven fabric layer 1 constituting the wall covering material 10 of the present invention is, from the viewpoint of its formation, needle punched nonwoven fabric based on card web or air laid web, resin bonded nonwoven fabric, thermal bonded nonwoven fabric, spun lace nonwoven fabric, etc. Spun-bonded non-woven fabrics, melt-blown non-woven fabrics, etc. may be mentioned. Among these, in terms of thickness, a needle punched non-woven fabric in which a card web is entangled by needle punching can be preferably used.

  In order to provide the non-woven fabric layer 1 with flame retardancy to the wall covering material 10, it is preferable that at least 30% by mass of all the constituent fibers be flame retardant fibers. Here, the "flame retardancy" of the flame retardant fiber means that the limiting oxygen index (LOI value) defined by JIS L1091 is 26 or more. Specific examples of such flame retardant fibers include polyvinyl chloride fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, acrylic fibers, aramid fibers, phenolic fibers and the like. Among them, acrylic fibers are preferable because they are relatively low in manufacturing cost, excellent in dyeability, and fibers are easily entangled, and modacrylic fiber, which is a type of acrylic fiber, can be particularly preferably mentioned. These flame retardant fibers may be used alone or in combination of two or more.

  The fineness of such flame retardant fiber is not particularly limited, but is preferably 1 dtex or more, more preferably 2 dtex or more from the viewpoint of fiber strength, and preferably from the viewpoint of smoothness, appearance and texture. It is 20 dtex or less, more preferably 11 dtex or less.

  In addition, the non-woven fabric layer 1 reduces the material cost of the non-woven fabric layer 1 to the extent that the flame retardant properties of the wall covering material are not impaired, and polyolefins such as polyester, polypropylene and polyethylene for improving the texture and texture. Flammable fibers such as nylon, cotton, polyamide and polyimide can be contained as constituent fibers. Among them, it is preferable to contain a polyester fiber in consideration of cost, ease of interlacing fibers, fiber strength, and the like. The "combustibility" of the combustible fiber means that the limit oxygen index (LOI value) defined by JIS L1091 is less than 26.

  A preferable specific example of the non-woven fabric layer 1 is a needle punched non-woven fabric containing 20 to 70% by mass of polyester fiber of 1 to 20 dtex and 30 to 80% by mass of flame retardant fiber of 1 to 20 dtex, particularly modacrylic fiber Can be mentioned.

  The thickness of the non-woven fabric layer 1 (that is, the thickness of the non-woven fabric layer including the resin-coated layer 2) is preferably 1 mm or more, more preferably 2 mm or more from the point of sound absorption performance. Preferably it is 10 mm or less, More preferably, it is 5 mm or less.

In addition, the weight per unit area of the non-woven fabric layer 1 is preferably 150 g / m ² or more, more preferably 200 g / m ² or more, from the viewpoints of non-land hiding property, sound absorbing property, and exuding prevention of glue. Preferably it is 500 g / m < ² > or less, more preferably 300 g / m < ² > or less from the point of etc.

Further, the apparent density of the nonwoven fabric layer 1, from the viewpoint of sound-absorbing and cushioning property and workability, is preferably 0.015 g / cm ³ or more, more preferably 0.05 g / cm ³ or more, in terms of texture, etc. Preferably, it is 0.5 g / cm ³ or less, more preferably 0.2 g / cm ³ or less. The apparent density here is the apparent density of the non-woven fabric layer 1 excluding the resin-coated layer 2.

<Resin coating treatment>
With resin coating processing applied to the wall covering material 10 of the present invention, the resin composition is applied to at least one surface of the non-woven fabric layer 1 by a known application method and heating is performed to partially coat the resin. It means the process of forming a layer. Here, "partially" means that it is not the entire surface of the treated surface, "coating" means a resin layer in the form of a film, and thus "partially resin-free resin layer" It means that the entire surface of the treatment layer is not in the form of a film.

  The resin coating treatment is not particularly limited as long as it is a treatment that can partially form a resin layer without a film. Specifically, after the resin composition to which the foaming agent is added is applied to the non-woven fabric layer by a known method, the foaming agent is foamed by heating the coating film or the like to partially coat the resin layer without the film. A method of forming, a method of forming a grid-like or dot-like resin layer when applying the resin composition to a non-woven fabric layer using a gravure printing method, a rotary screen printing method or the like, a foamed resin composition (preferably And the like (the so-called foam coating method) of applying to a non-woven fabric layer by a known coating method in the state where bubbles are contained in the acrylic resin composition). In particular, it is preferable to use a foam coating process which is fixed to the surface of the non-woven fabric layer and can retain the voluminous feel of the entire non-woven fabric layer and is also excellent in sound absorption performance.

  A crosslinker, a dispersant, a flame retardant, a colorant, a filler, a foam stabilizer, an antibacterial agent, an antifungal agent, a water repellent, etc. may be added to the resin composition to be applied to the resin coating treatment, if necessary. it can. Moreover, the solution and emulsion containing resin can also be used for a resin composition. Selection of these components, addition amount, etc. can be suitably selected according to the kind of non-woven fabric layer of wall covering material, the application place of wall covering material, etc. The additive to be used can be appropriately selected depending on the treatment method to be employed, and when the foam coating treatment is carried out, it is preferable to add a foam stabilizer in order to make the resin into an emulsion and obtain uniform foam.

The resin solid content (that is, the resin solid content of the resin-coated layer 2) in the resin coating treatment is preferably 1 g / m ² or more, more preferably 5 g / m ² or more, from the viewpoint of suppressing the expansion and contraction of the nonwoven fabric layer 1. It is particularly preferably 10 g / m ² or more, and preferably 50 g / m ² or less, more preferably 25 g / m ² or less, particularly preferably 20 g / m ² or less, from the viewpoint of maintaining flame retardancy.

  Examples of the resin constituting the resin coat treatment layer 2 include acrylic resins, polyester resins, polyurethane resins, vinyl chloride resins, and fluorine resins. The glass transition temperature is preferably −50 ° C. or higher, more preferably −40 ° C. or higher from the viewpoint of wear resistance, and the glass transition temperature is preferably 50 ° C. or lower, more preferably from the viewpoint of rigidity and texture. It is preferable to use one having a temperature of 30 ° C. or less.

  In the case of forming a resin layer partially having no film by foaming using a foaming agent in resin coating treatment, the foaming magnification can be appropriately determined depending on the amount of the foaming agent added and the like. In the case of the foam coating process, the expansion ratio can be appropriately determined depending on the foam control agent and the processing conditions for foaming, but it is preferably 6 to 10 times in terms of rigidity and dimensional stability.

<Other layers>
In the wall covering material 10 of the present invention, in addition to the resin-coated layer of the non-woven fabric layer 1, a print layer can be provided for the purpose of improving the design, if necessary. Specifically, a printing layer having a design excellent in design can be formed on one side of the non-woven fabric layer 1 by a known printing method, and resin coating can be applied to the upper surface or the opposite surface of the printing layer. Examples of the printing method include gravure printing, flexographic printing, rotary screen printing, ink jet printing and the like, which can be appropriately selected and used.

<Physical properties that serve as an index to identify wall covering materials>
The wall covering material 10 of the present invention preferably exhibits predetermined sound absorption and dimensional stability from the viewpoint of its physical properties, and additionally preferably exhibits predetermined air permeability and flame retardancy, and additionally peeling With respect to strength (adhesion), workability, and removability after aging, it is preferable to show the physical properties required as a wallpaper. These physical properties will be described in more detail. In addition, the adjustment of these physical properties includes the kind of the constituent fiber of the non-woven fabric layer and the fineness thereof, the method of forming the web and the method of interlacing and the degree of entanglement, thickness of the non-woven fabric layer, fabric weight, apparent density, etc. The kind of resin which comprises the resin composition to be used, the formation method of a resin coating process layer, etc. can be selected suitably, and can be performed. In addition, addition of a chemical to a resin composition used for resin coating treatment can impart antistatic performance, stain prevention performance, and water repellency performance required for wallpaper.

<Manufacture of wall covering material>
The wall covering material of the present invention can be produced by applying the resin composition to the non-woven fabric layer. For example, it can be manufactured by applying a resin composition to a needle punched non-woven fabric in which a carded web of polyester staple fibers is entangled by needle punching using a slit coater and drying by heating to form a resin coated layer. It is preferable to carry out the calendering process of the nonwoven fabric layer beforehand, before apply | coating a resin composition. Thereby, the surface of the non-woven fabric can be smoothed, and the formation of the resin-coated layer becomes smooth.

  Hereinafter, the present invention will be specifically described based on examples and comparative examples, but the present invention is not limited to these.

Examples 1 to 6
A polyester fiber of 2.2 dtex and a modacrylic fiber of 2.2 dtex as a flame retardant fiber were mixed at a mass ratio of 1: 1, and carding was performed to obtain the basis weight of Table 1, to prepare a fleece. The fleece was needle-punched to form a needle-punched nonwoven fabric having the thickness and apparent density shown in Table 1.

20 parts by mass of an aqueous acrylic resin emulsion (Polysol (registered trademark) AT-731 manufactured by Showa Denko KK), 0.2 parts by mass of surfactant (Profan (registered trademark) 2012 E manufactured by Sanyo Chemical Industries, Ltd.), water 80 The mixture consisting of parts by mass was bubbled with a stirrer and adjusted to have a foaming ratio of 8 times. The resulting foamable resin composition is coated on one side of the needle punched non-woven fabric by a slit coater so that the resin solid content is 15 g / m ^2, and the foam coating treatment is performed by drying at a temperature of 170 ° C. for 1 minute. , Wall covering materials of Examples 1 to 6 were obtained.

Example 7
By needle-punching 2.2 dtex acrylic fibers, a nonwoven fabric layer having a basis weight of 200 g / m ² , an apparent density of 0.05 g / cm ³ and a thickness of 2 mm was formed. On this non-woven fabric layer, a foamable resin composition comprising 100 parts by mass of acrylic resin, 30 parts by mass of capsule foaming agent (forming binder 3DE manufactured by Matsui Dye Chemicals Co., Ltd.), and 20 parts by mass of flame retardant the coating is solid 40 g / m ^2, foamed at a temperature of 120 to 130 ° C., to obtain a wall covering material of example 7.

Comparative Example 1
A needle-punched acrylic fiber (Kanekaron (registered trademark), Kaneka Co., Ltd.) of 3.3 dtex (fiber length 51 mm) provides a fabric weight of 200 g / m ² , an apparent density of 0.10 g / cm ³ , and a thickness of 2 mm. The layers were formed and paper calendered at 100 ° C. Next, an adhesive was applied to the surface of a backing paper having a basis weight of 75 g / m ² , and the non-woven fabric layer was laminated. A foamable resin composition comprising 100 parts by mass of an acrylic resin, 30 parts by mass of a capsule foaming agent, 20 parts by mass of a flame retardant and 1 part by mass of an antifungal agent on the needle punched nonwoven layer is resin-solidified using a rotary screen. min. the coating is 5 g / m ^2, foamed at a temperature of 120 to 130 ° C., to obtain a wall covering material of Comparative example 1.

Comparative example 2
Paste vinyl chloride resin (polymerization degree 700) 100 parts by mass, plasticizer (DEHP) 60 parts by mass, foaming agent (azodicarbonamide type) 4 parts by mass, barium-zinc based stabilizer 3 parts by mass, calcium carbonate 80 parts by mass, A paste paint consisting of 16 parts by mass of titanium oxide was applied on a general paper having a basis weight of 65 g / m ^{2 at} a weight of 240 g / m ² and heated to gel. Thereafter, a pattern pattern was printed on the vinyl chloride layer by gravure printing, heated and foamed, and further heated and pressed with a embossing roll to obtain a vinyl chloride wallpaper with a thickness of 0.5 mm.

<Evaluation of wall covering material>
"Sound absorption", "Dimensional stability", "Air permeability", "Flame retardancy", "Peeling strength (adhesion)", "Applicability", "After the passage of time" The peelability was evaluated by the test as shown below. The obtained results are shown in Table 2 (FIG. 2) and Table 3.

Sound absorption
The wall covering material is required to have high sound absorption from the viewpoint of reducing the room echo. The evaluation was made based on the reverberation chamber sound absorption obtained by the following sound absorption coefficient test, and the obtained results are shown in Table 2 and plotted in FIG. The sound absorption coefficient means that the larger the value, the better the sound absorption. In the present invention, it is desired to show a reverberation-based sound absorption coefficient of 0.3 or more at a frequency of 3150 Hz by the following sound absorption coefficient test. The reason why the frequency 3150 Hz is selected is because human sensitivity to sound near the frequency 3150 Hz is high.

(Sound absorption coefficient test)
Using two test wallpapers cut into 95 cm x 300 cm, bond the resin-coated side up with the adhesive from the top with adhesive tape to make a 190 cm x 300 cm sample, and the four sides of the sample also adhere to the floor of the reverberation chamber The tape was used for adhesion, and the reverberation chamber sound absorption coefficient at a frequency of 3150 Hz was measured according to JIS A1409. The reverberation chamber used had a volume of 38.9 m ³ and a surface area of 177 m ² and had a room temperature of 13.3 ° C., a humidity of 59.0%, and a pressure of 10 13 hPa.

  In addition, in order to make the numerical value of a reverberation chamber method sound absorption coefficient small, it can carry out by making the fabric weight of a nonwoven fabric small, for example. Moreover, in order to enlarge, it can carry out by enlarging the fabric weight of a nonwoven fabric, for example.

<Dimensional stability>
The wall covering material is required to be resistant to elongation and wrinkles when the starch-based aqueous adhesive is applied. In particular, it is to prevent a problem in the pattern alignment with the adjacent wall covering material when laminating the wall covering material. In the present invention, a dimensional change rate of 0.1% or less is desired by the following dimensional stability evaluation test.

(Dimensional stability evaluation test)
After making a dot-shaped mark with an oil-based marker at intervals of 1 m on the surface side of the wall covering material sample, the aqueous adhesive for starch-based wallpaper on the back (non-woven fabric side) side has a solid content of 12 g / m ² Apply in an amount, stack the back surfaces (adhesion coated surfaces) on each other so as not to dry the adhesive, leave in an atmosphere of temperature 20 ° C., humidity 65% for 4 hours, and measure the distance between the applied marks The dimensional change rate was calculated.

  In addition, when dimensional stability evaluation is performed by wall covering material created using the backing paper for wallpaper, about 1% of elongation arises. For this reason, in the wall covering material using a backing paper, after applying a starch-based water-based adhesive to the backing paper side, immediately open the wallpaper with water contained in the adhesive by taking an open time without performing a pasting operation. It is necessary to perform the pasting work after stretching and further impregnating the backing paper with a starch-based adhesive to improve the adhesion. If the bonding operation is performed immediately after the application of the adhesive, the joint portion (the portion where the pattern is matched with the adjacent wall covering material) may be overlapped, or a gap may be generated (open), or peeling may occur. . On the other hand, in the case of the other side pasting method, when the pasting operation is performed, inconveniences such as wrinkles in the product occur.

<Breathability>
Wall covering materials are required to be breathable in order to ensure sound absorption and prevent mold formation on the wall. In the present invention, it is desired that the air permeability measured by the Frazier-type air permeability test according to JIS L1096 is 10 to 200 cm ³ / cm ² · s. Below this range, the wallpaper gets wet with moisture, which tends to cause mold formation, and when it exceeds this, the drying of the adhesive tends to be quick and the workable time tends to be short.

<Flame retardancy>
Wall covering materials are required to maintain flame retardant performance as basic performance as wallpaper. As a part of that, the heat generation test by the corn calorimeter method based on ISO 5660 is carried out, and the case where all the following evaluation indexes (a), (b) and (c) are satisfied is evaluated as good "o" The case where even one was not satisfied was evaluated as bad "x". This conforms to the pass / fail judgment of the fireproof material's semi-combustible performance according to Article 108-2 of the Building Standard Act Execution Order.
(A) The total calorific value for 10 minutes after the start of heating is 8 MJ / m ² or less.
(B) There is no crack or hole penetrating to the back side harmful to fire protection for 10 minutes after the start of heating.
(C) The maximum heating rate does not exceed 200 kW / m ² continuously for 10 seconds for 10 minutes after the start of heating.

<Peeling strength test>
Wall covering materials are required to have adhesion to the wall. In the present invention, it is desired to exhibit a peel strength of 1.0 N / 3 cm or more by the following peel strength test method.

(Peeling strength test method)
Gypsum board for residential building materials (Yoshino Gypsum) coated with an aqueous adhesive for starch-based fleece wallpaper (free stack (trademark) made by Yayoi Chemical Industry Co., Ltd.) in an amount of solid content of 12 g / m ² A wall covering material sample cut to a width of 30 mm and a length of 200 mm is attached to Tiger Board (registered trademark) made by Co., Ltd. and after standing for 48 hours under an environment of humidity 65% at 20 ° C, Shimadzu Corporation Using a universal tester, the sample was peeled 180 degrees in the longitudinal direction at a peeling speed of 300 mm / min, and the peel strength was measured.

  Note that if the peel strength is less than 1.0 N / 3 cm, it may peel off over time after construction, but if it is necessary to peel off the wall after construction without peeling off non-woven fabric, the peel strength is particularly It is not limited.

(Constructability)
The wall covering material is constructed by the usual construction method or construction by the glue pasting method, and the state after pasting the wallpaper on the wall is visually observed. After construction, those which did not appear abnormal in appearance such as wrinkles and peeling were evaluated as good "○", and those in which abnormality appeared in appearance such as wrinkles and peeling were evaluated as poor "X".

(Peelability after aging)
After standing for a week in an atmosphere with a temperature of 20 ° C and a humidity of 65%, the wallpaper on which the normal construction or the other side was applied using the paste application method was observed visually for the wall surface appearance of the wall surface when peeled off and the wall side. , Those with almost no material deposits from the wallpaper side to the wall are evaluated as good "○", while residues from the wallpaper side remain on the wall, and there is clearly a problem when performing the construction of the wallpaper again Those that could be judged to be present were evaluated as "bad". In addition, when there is a residue from the wallpaper side to the wall when removing the wallpaper after leaving the wallpaper after construction, if it is applied from above, there will be problems with fire performance and irregularities will occur when it is rebuilt There are problems such as Therefore, it is necessary to take effort to remove the residue, which becomes a major problem in the re-construction of the wallpaper, including the economics.

"Examination of evaluation results"
Sound absorption
As can be seen from Table 2 and FIG. 2, the wall covering materials of Examples 1 to 6 had a reverberation chamber sound absorption coefficient of 0.3 or more at a frequency of 3150 Hz which human beings can perceive particularly sensitively. In Comparative Example 2, 0.3 could not be maintained at 3150 Hz. In addition, the sound absorption of the wall covering material of Example 7 showed the reverberation chamber method sound absorption coefficient equivalent to the wall covering material of Example 1.

<Dimensional stability>
The dimensional change rates of the wall covering materials of Examples 1 to 6 were all 0.1% or less, as can be seen from Table 3. In each of the comparative examples, the dimensional change was 1.0% or more. Furthermore, although the same adhesive as the dimensional stability test was applied to the wall surface side and construction was carried out using Examples 1 to 6 (the pasting method), the construction could be done without problems without the occurrence of wrinkles etc. . In addition, the dimensional change rate of the wall covering material of Example 7 showed the dimensional change rate equivalent to the wall covering material of Example 1.

<Breathability>
The air permeability of the wall covering materials of Examples 1 to 6 was in the range of 10 to ²⁰⁰ cm ³ / cm ² · s as seen from Table 3, but the air permeability of the wall covering materials of Comparative Examples 1 and 2 was Both were less than 0.2 cm ³ / cm ² · s. The air permeability of the wall covering material of Example 7 was similar to that of the wall covering material of Example 1.

<Flame retardancy>
The flame retardancy of the wall covering materials of Examples 1 to 6 was all evaluated as good "」 "as seen from Table 3, while the wall covering material of Comparative Example 1 was heated for 10 minutes after heating. Since the total calorific value exceeds 8 MJ / m ² , it was evaluated as a defect “x”. In addition, the flame retardance of the wall covering material of Example 7 showed the flame retardance equivalent to the wall covering material of Example 1.

<Peeling strength and workability>
The peel strengths of the wall covering materials of Examples 1 to 6 and Comparative Examples 1 and 2 were all maintained at 1.0 N / 3 cm or more, as can be seen from Table 3. With regard to workability, in the ordinary gluing method by applying a starch-based aqueous adhesive to the wall covering material side, the wall covering materials of Examples 1 to 6 and Comparative Examples 1 and 2 are applied without any problem. I was able to. On the other hand, in the construction by the other side pasting method which applies an adhesive to the wall surface side, although the wall covering material of Examples 1-6 was able to be built without a problem, the wall covering material of Comparative Examples 1 and 2 is a wall covering material There was an ax and it was not possible to do the construction beautifully. The peel strength of the wall covering material of Example 7 was the same as that of the wall covering material of Example 1, but with respect to the workability, the surface friction resistance was higher than that of the wall covering material of Example 1. Although it was slightly inferior in terms of, from a practical point of view, construction without problems was possible with the pasting method or pasting method.

<Peeling after aging>
The wall covering material attached to the wall was left in an atmosphere of temperature 20 ° C. and humidity 65% for one week and then peeled off. In the wall covering materials of Examples 1 to 6, the non-woven fabric layer adhered to the wall surface There was little to do, it was possible to reapply immediately after peeling off the wall covering material. On the other hand, in the wall covering material of Comparative Examples 1 and 2, when the wall covering material is peeled off, part of the backing paper remains on the wall surface and time and labor for peeling back the backing paper etc. remaining on the wall surface It became necessary. The peelability of the wall covering material of Example 7 after aging was the same as that of the wall covering material of Example 1.

  The wall covering material of the present invention is applicable to the pasting method because the backing layer is not laminated, and when the wall covering material is peeled off from the wall, there is no possibility that the backing paper sticks to the wall. Become. Moreover, the resin-coated layer formed on at least one surface of the non-woven fabric layer is suppressed in permeation into the interior of the non-woven fabric layer and formed near the surface. It is possible to suppress the decrease. Thus, it is possible to peel off the wall covering material without the presence of the backing sheet. In addition, the resin coating layer can contribute to the improvement of the texture and surface performance of the wall covering material and the realization of the functionalization.

1 Non-woven layer 2 Resin-coated layer 10 Wall covering material

Claims (12)

  It is a wall covering material formed by resin coating treatment for forming a resin layer partially without a film on at least one side of the non-woven fabric layer, and the backing paper is not laminated on any side of the non-woven fabric layer Wall covering material.   The wall covering material according to claim 1, wherein the non-woven fabric layer is a needle-punched non-woven fabric in which a carded web is entangled by needle punching.   The wall covering material according to claim 1 or 2, wherein at least 30% by mass of all the fibers constituting the non-woven fabric layer is a flame retardant fiber.   The wall covering material according to claim 1, wherein the non-woven fabric layer is a needle punched non-woven fabric containing 30 to 80% by mass of flame retardant fibers of 1 to 20 dtex. Nonwoven layer, except the thickness of 1 mm to 10 mm, and basis weight of ^{150g / m 2 ~500g / m 2} , the resin coated treated portion, an apparent density of 0.015g / cm ³ ~0.5g / cm ³ And the wall covering material according to any one of claims 1 to 4.   The wall covering material according to any one of claims 1 to 5, wherein the resin coating treatment is a foam coating treatment using an acrylic resin composition. Resin solid content in the resin coating treatment, wall covering material according to claim 6 wherein the 1 to 50 g / m ^2.   The wall covering material according to claim 6, wherein the glass transition temperature of the acrylic resin is -50 to 50 ° C.   The wall covering material according to any one of claims 1 to 8, wherein printing is applied to one surface of the non-woven fabric layer, and resin coating treatment is applied to the surface of the non-woven fabric layer to which printing is applied. Sound absorption coefficient test and dimensional stability evaluation test below:
<Sound absorption coefficient test>
Using two pieces of test wallpaper cut into 95 cm x 300 cm, bond the adhesive from the top with adhesive tape with resin coated side up to make a sample of 190 cm x 300 cm, adhesive tape on the floor of the reverberation room on all sides of the sample Bonding using the following method, and measuring the reverberation chamber sound absorption coefficient at a frequency of 3150 Hz according to JIS A1409;
<Dimensional stability evaluation test>
After making a dot-shaped mark with an oil-based marker at intervals of 1 m on the surface side of the wall covering material sample, the aqueous adhesive for starch-based wallpaper on the back (non-woven fabric side) amount of solid amount 12 g / m ² Of the back side (adhesion coated surface) to prevent the adhesive from drying and leaving for 4 hours at a temperature of 20 ° C and a humidity of 65%, after which the distance between the applied marks is measured and the dimensional change rate Calculate;
The wall covering material according to any one of claims 1 to 9, showing a reverberation chamber method sound absorption coefficient of 0.3 or more and a dimensional change rate of 0.1% or less. The air permeability measured by the Frazier-type air permeability test in accordance with JIS L 1096 is 10 to 200 cm ³ / cm ² · s,
The following conditions (a), (b) and (c) in the heat generation test by the corn calorie meter method according to ISO 5660:
(A) The total calorific value for 10 minutes after the start of heating is 8 MJ / m ² or less;
(B) 10 minutes after the start of heating, there is no crack or hole penetrating to the back side harmful to fire protection;
(C) 10 minutes after the start of heating, the maximum heating rate does not exceed 200 kW / m ² for 10 seconds continuously;
The wall covering material of Claim 10 which satisfy | fills. Peel strength test below:
<Peeling test>
Gypsum board for residential building materials coated with an aqueous adhesive for starch-based fleece wallpaper (Free Stack (registered trademark) made by Yayoi Chemical Industry Co., Ltd.) in an amount of solid content of 12 g / m ² Affixing a wall covering material sample cut to a width of 30 mm and a length of 200 mm on a trademark) and leaving it to stand in an environment of humidity 65% at 20 ° C. for 48 hours, using a universal tester manufactured by Shimadzu Corporation , Peel the sample 180 degrees in the longitudinal direction at a peeling rate of 300 mm / min, and measure the peel strength;
The wall covering material according to claim 11, which exhibits a peel strength of 1.0 N / 3 cm or more, when it is carried out.

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