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BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a
papermaking member for a speaker component having flame retardancy, for example, a
papermaking member such as a diaphragm and a bobbin for voice coil. 2. Description of the
Related Art Heretofore, the component parts of the speaker are colored in various colors
depending on various uses and preferences of the speaker. In addition, from the viewpoint of
safety, since the speaker is being made into a general flame retardant, the component parts are
also required to be flame retardant. Under such circumstances, a paper-making member for a
speaker component having sufficient flame retardancy and capable of being freely colored is
desired. A conventional method for producing a general flame-retardant sheet-forming member
for a speaker is a method 1 obtained by forming an esterified pulp such as phosphocellulose, or a
method of adding and fixing a water-soluble flame retardant at the time of sheet-forming, And
there is a method of impregnating a machined base material made of natural fibers and synthetic
fibers after being beaten and dyed as a raw material, and impregnating a 41 machine solventsoluble flame retardant. First, with regard to papermaking of esterified pulp 1-, for example, the
flame retardant is impregnated in a state IE such as a sheet valve, and after f being dried, it is
reacted and esterified by heating at about 200 ° C. Then, this is subjected to beating to make an
original book 1 and made into a sheet. In order to fix the water-soluble flame retardant to the
fiber at the time of papermaking, the fiber dispersed in water is fixed with a fixing agent such as
PEI (polyethyleneimine) in a beating machine or a paper making tank. Furthermore, in order to
impregnate the 41 machine solvent-soluble flame retardant into the base material after paper
making, the flame retardant is good as an organic solvent? Alcoholic solvents are generally used,
as they are dissolved in water and stably as high as 1, into which predetermined flame retardant
1.1 is dissolved and impregnated. However, first, when making an esterification valve, as the
pretreatment 1 is complicated and difficult to dye 0, the method of fixing the water-soluble flame
retardant to the fiber at the time of making has problems in wastewater treatment , Staining is
also difficult. A method is generally used in which a natural fiber and a synthetic fiber are beaten
and dyed to be used as a raw material to make a sheet, and / or a method in which an organic
solvent-soluble flame retardant is adhered by impregnation. しかし。 In this method, the solvent
of the flame retardant is mostly an alcohol-based solvent, and therefore, during impregnation, the
dyestuff is stained in the direct dyeing and the basic dye as in the prior art, and the dye is eluted
in the solution. . For this reason, there are problems such as the color tone of the diaphragm is
unstable and the processing solution is contaminated. The present invention has been made to
solve the above-mentioned drawbacks, and in the above-mentioned flame retardant treatment
step, the sulfur dye is used for dyeing the master roe 1 so that the flame retardant treatment
solution is impregnated with it. While preventing elution of dyestuff 4 and achieving stabilization
of color tone of components for speakers and prevention of contamination of processing
solution, a paper-making member for components for speakers having good flame retardancy is
provided. Is the purpose.
Hereinafter, the present invention will be described on the basis of one embodiment of the
drawings. First, dissolve a predetermined amount of sodium sulfide in hot water and mix it with a
predetermined amount of sulfurized dyestuff 11 of a predetermined I11 to completely dissolve it.
As described above, the dye solution prepared in advance is diluted as much as possible with
polyacid wood and uniformly added to wood pulp fibers during beating to perform dyeing. Also,
if necessary, eat 11! Footwear support such as is also diluted appropriately and added. Then, in
10 to 15 minutes, the dye adsorption on the valve is f-like f, Further, a sulfuric acid band
(aluminum sulfate) is added to completely fix. For example, a swing J plate of a predetermined
shape is formed into a sheet as a speaker component by an original register 1 obtained as
described in l-mark 0. Next, as an alcohol-soluble flame retardant, organic phosphorus-containing
A predetermined group is dissolved in an alcohol solvent such as methanol and thinner using a
nitrogen compound, a thermosetting resin such as trimethylolmelamine resin and its curing
medium as a solvent, to prepare a flame retardant solution. Thereafter, the diaphragm made by
paper-making 11) is dipped in the solution and dried at a predetermined temperature 1. Then, a
thermosetting resin as a moisture-proof agent is cured. Here, metal fiber other than wood valve
fiber, carbon # if necessary at the time of papermaking! By mixing with non-combustible or noncombustible fiber made of l # n, glass fiber or synthetic fiber, etc., further preferable properties
are exhibited. 1] After processing 100 sheets of diaphragms subjected to the flame-retardant
treatment steps as described above, those stained with conventional direct dyeing and those
stained with sulfurized dyestuff 1 of this example, 10 randomly A sheet was taken out, and the
change in the color tone of the surface was measured by a color difference meter. The results are
shown in Table 1. As is apparent from this table, although there is a change in the color tone of
the surface "-" due to the adhesion of the resin component, the difference in the change in color
tone when the adhesion haze is made the same. Clearly shows the difference in the degree of
elution of the dye. Table 1 Table 2 Furthermore, in order to clearly show this situation, the
treatment solution contaminated by elution with dye after treatment was impregnated into filter
paper (Toyosis Paper No. 2), and the change in whiteness was measured . The results are shown
in Table 2. Thus, the difference between the two names is clearly represented by I5 +. This means
that the sulfur in sulfurized dye 4 combines in the form of thiazole or the like to form a colored
nJ body, and forms polysulfide bond 3-n, which is treated with a sulfurized sorter at the time of
dyeing Then, the polysulfide bond is reduced to form 13Na- and becomes water soluble.
This water soluble leuco compound is #l! Since it is adsorbed to m, when the sulfuric acid band is
added thereafter, it is believed that the Na 3-is oxidized and combined with the sulfuric acid band
to form an insoluble disulfide. Therefore, even in water, alcohol, and other solvents, strong
insolubility can be obtained as compared with direct adsorption, which is simply adsorbed to
fibers and then bonded and fixed to a sulfuric acid band. In addition, as a component for
speakers, not only a diaphragm but a center cap, a voice coil povin, and others may be used, and
it can be widely applied in the flame-retardant and its coloring. The present invention is a
speaker river component having flame retardancy 11) through the process of forming an alcoholsoluble flame retardant after paper making as a raw material; 1 as dyed natural fibers and
synthetic fibers as in rattan In this case, the raw material is dyed with a sulfur dye to prevent the
instability of color tone and the contamination of the processing solution, and there is no fear of
generating a waste liquid which causes pollution as in the conventional flame-retardant
treatment. Also, because it is easy to dye, it has an extremely high value for T business.
Brief description of the drawings
The drawing shows a manufacturing process diagram of a speaker sheet forming member
according to the present invention.
Patent applicant Pioneer Corporation others l name
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