JPS59100798A - Fire retardant backing paper of wall paper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Uses in the PU industry) The present invention relates to an improvement in flame-retardant backing paper for vinyl wallpaper.

(Prior Art) In recent years, the use of wallpaper for interior decoration has been increasing. Among these wallpapers, vinyl wallpaper whose surface is treated with vinyl resin, especially JhK vinyl resin, is often used. The composition is made by applying a layer of vinyl chloride to the surface of a piece of paper, a vinyl compound made by adding various ingredients to stinging oil, and then applying embossed horns and printing.This vinyl resin is As for the method of entering i,
There are coating methods and calendar methods.

The coating method is to apply coating material 1 obtained by adding various compounding agents and diluents to ♂ chloride paste resin onto backing paper, dry it in a drying oven, and then perform printing and engraving. On the other hand, the calender method is a method in which a vinyl chloride resin compound is heated and melted, rolled and pressed onto a backing paper using a calendar roll, and bonded. Furthermore, foaming of the vinyl chloride layer is also carried out as required.

Furthermore, there has been an increasing demand for paper with an eaves-heavy surface as a flame-retardant backing paper. As a backing paper for vinyl wallpaper, it is necessary to maintain appropriate whiteness and opacity in order to give the surface vinyl chloride layer a uniform color tone.

In addition, in order for the paper to be reattached neatly when replacing the wallpaper, it is necessary to weaken the interlayer strength of the lining paper so that the lining paper can be completely peeled off between the layers. .

For this reason, the backing paper is also required to have excellent bulkiness. Furthermore, what is the f11 fuel component, and in order to maintain flammability, ] 3 to 25? /rr? C vs. base paper) It is necessary to impregnate the paper, but in order to impregnate the necessary amount at once using a size press etc. in a normal paper machine, it is necessary to
0 parts by weight of an aqueous refueling solution should be used.

However, there are few external combustion agents with such high solubility;
Even if a highly concentrated aqueous solution was created by simply dissolving it, the stability was problematic. For this reason, 9 base papers, which had good impregnation properties even with a low concentration aqueous solution, were twisted.

Conventionally, as dry absorbent papers, those containing titanium dioxide as a filler have been mainly used because they satisfy the above-mentioned required physical properties, especially opacity.

However, although titanium dioxide is good in whiteness and opacity, it cannot be said to have sufficiently improved in terms of expensive reed height, interlayer strength, and impregnability.

(Objective of the Invention 9 The object of the present invention is to provide wallpaper with good flame retardant impregnation properties 1 (
The purpose of the present invention is to provide a flame-retardant backing paper, and more importantly, to provide a flame-retardant backing paper for wallpaper that maintains good whiteness and opacity, appropriate bulkiness, and appropriate interlayer strength.

(Structure of the Invention) The present inventors have made various changes to the filler that provides the above-mentioned physical properties required for backing paper for vinyl wallpaper. As a result, the present inventors have found that the first case in which diatomaceous material is internally added to the above-mentioned base paper has good properties. The present invention was completed based on the discovery that it maintains whiteness and opacity, has an appropriate thickness, and can also provide appropriate interlaminar strength and q.1 (combustible impregnability).

The present invention is a flame-retardant backing paper for wallpaper in which a base paper is impregnated with a flame-retardant composition, and the flame-retardant backing paper for wallpaper is characterized in that it also contains a flame-retardant composition.

Next, the elements constituting the present invention will be explained in detail.

(Pulp for manufacturing base paper) The raw material pulp for manufacturing the flame-retardant backing paper for wallpaper of the present invention is machine pulp such as kraft pulp, ground bulldog pulp, thermomechanical pulp, refiner mechanical pulp, etc. . Usually, bleached kraft pulp alone or, if necessary, a suitable amount of mechanical pulp is used.

For special purposes, glass fibers, organic or inorganic fibers may be added.

(Diatomaceous material) The diatomic material used to produce the backing paper of the present invention may be either a naturally occurring diatomic material simply crushed, a classified product from which coarse particles have been removed, or a calcined product. Can be used. All of these diatoms have an apparent specific gravity of 01 to 035, a large specific surface area,
It is preferable that the paper has excellent oil absorption properties and exhibits excellent performance as a base paper impregnated with a flame retardant-r6E composition. Addition on the diatom [1 song, pulp 1. 2 to 0 parts by weight
20 parts by weight is appropriate, but if it is less than 2 parts by weight, the effect will be small, and if it is more than 20 parts by weight, the strength etc. will be weakened as a backing paper, which is inappropriate.

(Flame retardant composition) The flame retardant composition impregnated into the backing paper of the present invention mainly consists of (A) a flame retardant and (13) an adhesive.

(A) Aft flame retardants include water-soluble or water-dispersible flame retardants such as guanidine sulfamate, diguanidine phosphate, ammonium sulfamate, condensed alkyl phosphate derivatives, guanidine sulfate, ammonium phosphate, and ammonium lIf acid. These may be used alone or in combination of two or more.

(B) As an adhesive, starch or a modified product thereof;
Water-soluble polymer compounds such as polyvinyl alcohol, synthetic rubber latex, or synthetic resin emulsions are used alone or in combination of two or more.

(C) Optional component flame retardant composition includes (A), CB+B+ components,
If necessary, auxiliary materials for paper manufacturing such as starch, sizing agents, dyes and pigments, diamide, methylolated melamine, etc.
Even if a thermal cutting aid such as a methylolated product of dianediamide is used in combination, there is no problem at all as long as it does not impede the object of the present invention.

The flame retardant composition comprising components A and B and optionally I)C is used for impregnating the backing paper of the invention, usually as an aqueous solution with a concentration of 35 to 65%.

(Optional components of the lining paper) In addition to the above-mentioned pulp and diatomaceous material, the lining paper of the present invention contains:
Depending on the quality requirements for the backing paper, other fillers may be added, e.g.
It can be produced by using clay, acid clay, talc, calcium carbonate, synthetic silicate, synthetic aluminum silicate, etc. in combination. The base paper can also contain paper strength enhancers commonly used in paper making, such as melamine-formaldehyde resin, urea-formaldehyde resin, polyamide resin, etc.

(Production of flame-retardant liner paper) The flame-retardant liner paper of the present invention can be produced by impregnating a base paper with an aqueous solution of a flame-retardant composition. Any method may be used as long as the base paper can be uniformly impregnated with the aqueous composition, but usually it is impregnated with a size press machine or tab size machine during base paper making, or after making the base paper in advance. This is achieved by subsequent impregnation processing using an impregnation machine.

The appropriate amount of the flame retardant composition to be impregnated is 13 to 40 parts by weight. If it is less than 133 parts by weight, almost no flame retardant effect will be obtained, and if it exceeds 11.0 parts by weight, no further improvement in flame retardancy can be expected, which is not preferable from an economic standpoint.

Example I NBI (P50 parts by weight, LBKP 30 parts by weight and G
Pulp containing 20 parts by weight of P was blended to obtain a pulp slurry having a concentration of 1. This pulp slurry was pounded (pounded at 1 pound) to obtain a slurry having a Canadian freeness of 11.50 rnl. Next, 1 part by weight of the filler shown in Table 1 and melamine formaldehyde resin were added to give a pulp density of 0.
A slurry of Section 6 was obtained. Length πli1: Paper is made by a conventional method using a type 1 paper machine, 60 ? / 77Z' base paper was obtained. Next, apply the following flame retardant aqueous solution to the base paper specified in Section 2]. /ly? After impregnating the flame retardant backing paper at a ratio of 1,000 ml, and drying, a paper quality test was conducted on the obtained flame-retardant lined paper.

As a result, the backing paper containing diatomaceous earth of the present invention was bulkier and more opaque than the case of titanium dioxide. Furthermore, after applying this backing paper to a wall as wallpaper, the wallpaper was peeled off from the wall very well between the paper layers.

(Preparation of flame retardant aqueous solution) A mixture consisting of 100 parts by weight of guanidine sulfamate, 10 parts by weight of oxidized starch, and 5 parts by weight of sizing agent was dissolved in water, and the mystery level of the mixture was 11°. do.

Table 1 Experiment number 1 2 3 4 Filler name
-Titanium dioxide diatomaceous earth "Shin O in the firing paper" o6.9 7.2 7.9
(For pulp heavy duty) Thickness (mm) 0. ], ]190.121 0.
125 0.124 Whiteness (related) 59,0 6
8.8 53.6 63.6 Opacity (%)
81,6 90. '3 92.8 86.4 Note 9
The titanium dioxide in Table 1 is of the rutile type with an average particle size of 0.23μ.

The diaphragm is Kunimine Kogyo 6 vermillion Kunilite 201,
The 300 mesh pass belongs to Section 93.

Calcined diatomaceous earth is Kuniminee Hata C Vermilion Nirite S A
, 106, and 300 mesh buses belong to the 999 section.

Example 2 The base paper of Example 1 was impregnated with the aqueous flame retardant solution of Example 1 at 80% by size press method under the same conditions, and the difference in impregnability was evaluated.

The results are shown in Table 2.

As a result, it is clear that the base paper to which diatomaceous earth has been added has greatly increased liquid absorption due to the porosity and bulkiness of diatomaceous earth, and the amount of flame retardant impregnated has increased.

Table 2 Experiment number 5 6 7 8 Filler name - Titanium soil thickness axis (m) 0.119 0.
121 0. ], 25 0.124 (Less Effect of the Invention According to the present invention, by internally adding quince earth to the base paper of the backing paper for wallpaper, the opacity of the backing paper for wallpaper can be made to be the same as when titanium dioxide is mixed. Since the paper is retained and its thickness increases due to its bulk, a backing paper with good clinching properties can be obtained.

The interlayer strength of the 1/ξ backing paper was also moderately reduced, and when replacing the wallpaper, it became possible to cleanly peel the wallpaper from the wall, especially in the case of wallpaper coated with highly foamed vinyl chloride.

Sender: Oji Paper Co., Ltd. Agent: Patent Attorney Minoru Isaka

Claims (1)

[Claims] A flame-retardant backing paper for wallpaper in which a base paper is impregnated with a flame-retardant composition, wherein the backing paper also contains diatomaceous earth.