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JPS613599

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DESCRIPTION JPS613599
[0001]
[Industrial field of application] The present invention relates to a flame-retardant cotton cloth in
which a cotton cloth is treated with a flame retardant and then boron nitride is applied in a layer
form to form a damper for a speaker and the like formed by heat. "Prior art" A conventional
treatment apparatus for flame-retardant cotton cloth of this kind is as shown in FIG. 2. 0 is a
cotton cloth and this cotton cloth A is wound on the delivery side B. ing. C is a winding side on
which the cotton cloth A is wound. D is a flame retardant processing tank filled with a flame
retardant E such as ammonium polyphosphate aqueous solution, ammonium polyphosphate, etc.
F is a guide roller disposed in the flame retardant processing tank, G is outside the flame
retardant processing tank Guide roller installed in H, I: dryer, J: thermosetting resin tank filled
with thermosetting resin solution K, L: guide roller arranged in thermosetting resin tank J, M:
heat It is a guide roller installed on the ascent of the cured resin tank J. Next, the operation will
be described. First, the untreated cotton cloth A wound on the delivery side B is impregnated
with the flame retardant E by passing through the inside of the flame retardant treatment tank,
and then dried with the dryer H. Next, the thermosetting resin liquid K is applied by passing
through the thermosetting resin tank J, and after being dried by a drier 巻 取, it is wound on the
winding side C. And the damper for speakers is obtained with a metal mold | die from the cotton
cloth A after the process wound up by the take-up side C. FIG. As described above, the
conventional flame retardant cotton fabric treatment apparatus needs to be provided with a
flame retardant treatment liquid tank and a heat curing machine intestinal fluid tank J, and since
two drying processes are included, the treatment process is complicated and time is required. It
was costly and uneconomical. [Problems to be Solved by the Invention] The present invention has
been made to solve the above-mentioned drawbacks, and the treatment process is simplified by
applying a powder of boron nitride instead of the thermosetting resin liquid. To provide a flameretardant cotton cloth intended to [Means for Solving the Problems] Therefore, in order to
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1
achieve the above object, the present invention is to impregnate a cotton cloth with a flame
retardant such as ammonium polyphosphate aqueous solution and ammonium polyphosphate,
and then apply boron nitride in a layer form and thermally It is in molding. Hereinafter, the
present invention will be described based on embodiments of the drawings. FIG. 1 shows a block
diagram of a flame retardant cotton cloth treatment apparatus. In the above figures, 1 is a cotton
cloth, which is wound on the delivery side 2. 3 is a winding side for winding the cotton cloth l. 4
is a flame retardant treatment tank filled with a flame retardant 5 such as aqueous ammonium
polyborate solution or ammonium polyphosphate; 6 is a guide roller disposed in the flame
retardant treatment tank 4; 7 is outside the flame retardant treatment tank 4 The guide roller
installed in, 8 is a dryer.
9 is a boron nitride coater for spray application of powdered boron nitride. "Operation" Next 1.
The operation of the above embodiment will be described. First, the untreated cotton cloth l
wound on the delivery side 2 is impregnated with the flame retardant 5 by passing through the
inside of the flame retardant treatment tank 4, and then the result is obtained by the drier 8.
Then, the powder of boron nitride is jet-coated in a layer by passing through the boron nitride
coating machine 9, but the boron nitride is immediately wound on the winding side 3 without
passing through the drying process due to the powder. And the damper for speakers is obtained
by heat-press molding the cotton cloth 1 wound up by the take-up side 3. At this time, since
boron nitride is crimped to the cotton cloth 1, the holding power as a damper is improved.
Further, the adjustment of the holding power can be easily performed by the application amount
of boron nitride. The decomposition degree of boron nitride is 3000 ° C. or more. Furthermore,
since boron nitride is excellent in high temperature lubricity, the moldability of the damper is
good. [Effects of the Invention] As described above, after impregnating and drying the flame
retardant 5 in a cotton cloth 1 as in the case of the present invention, powder boron nitride is
applied in a layer form and thermoformed, so that the treatment process is simplified, and
Processing time can be shortened and cost can be reduced.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram of a flame-retardant cotton cloth treatment apparatus according to the
present invention, and FIG. 2 is a block diagram of a conventional flame-retardant cotton cloth
treatment apparatus.
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2
l ... cotton cloth, 5 ... flame retardant, 9 ... boron nitride coating machine. Figure 1
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3
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