JP2003334600A - Treatment method for coating pretreatment waste and vibration damping material of vehicle panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively put chemical forming sludge and an oil component, which are formed in the pretreatment of a coating line, to practical use. <P>SOLUTION: Waste containing the chemical forming sludge and the oil component is collected from a treatment tank 1 filled with a degreasing/chemical forming treatment liquid and dehydrated to be reutilized as a compound of the vibration damping material 50 of a vehicle panel. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method of treating waste discharged in a pre-painting treatment step of subjecting a vehicle to degreasing treatment to zinc phosphate chemical conversion treatment, and a control applied to a floor panel or the like of a vehicle. Regarding choreography.

[0002]

BACKGROUND ART At present, zinc phosphate chemical conversion treatment is widely performed on metal surfaces plated with iron or zinc to impart rust prevention and paintability.

The general treatment steps of this type of zinc phosphate treatment are as follows: degreasing → washing → surface adjustment → chemical conversion treatment (zinc phosphate treatment) → washing → drying. The degreasing treatment, degreasing water washing, and surface adjustment are carried out in multiple steps if necessary.

By the way, in this chemical conversion treatment step, the chemical conversion sludge (mainly iron phosphate) produced in the chemical conversion treatment tank.
Although it is filtered by using a filter or the like and disposed of, it is necessary to effectively use the resources because the disposal is expensive.

[0005]

DISCLOSURE OF THE INVENTION It is an object of the present invention to effectively utilize the chemical conversion sludge and the oil content produced in the pretreatment process of the coating line.

In order to achieve the above object, the first aspect of the present invention
From the viewpoint of, the waste that contains the chemical sludge and oil is collected from the treatment tank filled with the degreasing and chemical conversion treatment liquid, and after dewatering it, it is reused as the compound of the damping material of the vehicle panel. A method for treating pretreatment waste is provided.

According to a second aspect of the present invention, in a vehicle panel vibration damping material containing petroleum asphalt, an inorganic substance, an organic substance and a fiber material, a degreasing / chemical conversion treatment liquid in a coating line is removed from a treatment tank. Provided is a vibration damping material for a vehicle panel, which is mixed with discharged sludge and oil.

According to the present invention, the waste produced in the processing tank is effectively utilized when the pre-painting treatment is carried out using the degreasing / chemical conversion treatment liquid capable of simultaneously performing the degreasing treatment and the chemical conversion treatment in one step. To do. That is, when the degreasing treatment and the chemical conversion treatment are simultaneously performed in one process, the oil content and the chemical conversion sludge are mixed in the treatment tank. Therefore, even if oil or chemical sludge is removed by using a separating device or the like, these become mixed wastes, and particularly oil is mixed, so that the object of reuse is significantly limited.

However, since the vibration damping material of the vehicle panel contains petroleum asphalt as a main component, if the amount of waste mixed with oil is limited to a predetermined amount, there will be no problem in terms of performance. This makes it possible to effectively utilize the waste generated in the pre-painting treatment step using the degreasing / chemical conversion treatment liquid.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a coating pretreatment apparatus according to the treatment method of the present invention, FIG. 2 is a perspective view and a sectional view showing an embodiment of a dust removing means according to the present invention, and FIG.
FIG. 4 is a perspective view showing another embodiment of the dust removing means according to the present invention, FIG. 4 is a sectional view showing yet another embodiment of the dust removing means according to the present invention, and FIG. 5 is a water-polar organic matter according to the present invention. 6 is a conceptual diagram showing an embodiment of a solvent separating means, and FIG. 6 is a conceptual diagram showing an embodiment of an ion removing means according to the present invention.

FIG. 1 shows a pre-coating treatment step for performing degreasing treatment, surface conditioning and chemical conversion treatment on an object to be coated such as an automobile body. As shown in the figure, the vehicle body 9 is transported by the coating transport line 10 while being mounted on a hanger. In the present embodiment, two dipping tanks 1 and 8 are provided along the coating transfer line 10, and a processing tank 1 (hereinafter, degreasing processing) for performing degreasing treatment and chemical conversion treatment is provided on the upstream side in the conveying direction indicated by an arrow in the figure. It is also referred to as a chemical conversion treatment tank 1), and the downstream side is a rinse tank 8 for cleaning the treated body 9. The treatment tank 1 is filled with a degreasing / chemical conversion treatment liquid, and the rinse tank 8 is filled with pure water.

The degreasing / chemical conversion treatment liquid used in this example is a treatment liquid capable of performing three kinds of treatments such as degreasing treatment, surface conditioning and chemical conversion treatment in the same step. Examples of such a degreasing / chemical conversion treatment liquid include at least alcohol, glycol ether or diethylene glycol ether-based polar organic solvent, water, zinc ion, phosphate ion, manganese ion, nickel ion, and sodium ion. A treatment liquid containing it can be used. By using this treatment liquid, the degreasing process, the surface conditioning process, and the chemical conversion process can be performed simultaneously in one process, which greatly shortens the treatment process, simplifies the treatment equipment, saves space, and improves productivity. Improvement, reduction of drug cost,
It is possible to simplify drug management.

As shown in FIG. 1, the degreasing chemical conversion treatment tank 1 has a circulation system in which the processing liquid in the degreasing chemical conversion treatment tank 1 is sucked by a pump 14 and circulated so as to be returned to the degreasing chemical conversion treatment tank 1 again. 11 is provided, and the circulation system 11 is provided with a dust removing device 2, a chemical conversion sludge removing device 3, in order from the upstream side.
An oil removing device 4 is provided.

The dust removing device 2 removes dust particles such as iron powder contained in the treatment liquid in the degreasing chemical conversion treatment tank 1 and the cleaning liquid in the rinse tank 8. The removed dust particles are discarded and the dust particles are removed. The removed treatment liquid is sent to the next conversion sludge removing device 3. Specific devices that can be used as the dust removing device 2 of this example include a set ring tank, a centrifugal separator, and a magnet separator. Each will be described below.

As shown in FIG. 2, a set ring tank 21 as an example of the dust removing device 2 is provided with a partition plate 213 which meanders the flow path 212 in the tank 211, and enters from an inlet 214. The processing liquid is the partition plate 21.
3 meanders inside the tank and reaches the outlet 215. At this time, the rising speed of the treatment liquid is controlled to be lower than the sedimentation speed of dust particles such as iron powder, whereby dust particles such as iron powder are deposited on the bottom surface of the tank 211, and the treatment liquid can be cleaned. The settling tank 21 is inexpensive as a simple device and is effective for relatively heavy dust other than light dust floating in the treatment liquid.

As shown in FIG. 3, a centrifugal separator 22 as another example of the dust removing device 2 is a slit-shaped special separator provided in a tangential direction with a processing solution and iron dust or the like that have entered from an inlet 221. It is accelerated by passing it through the rotation mechanism 222, and solid matter (dust particles) heavier than the liquid is centrifugally moved along the inner wall to the lower collection chamber 22.
3, while the solid content is discharged from the solid content outlet 224, the processing liquid is raised from the inner pipe 225 to be discharged from the processing liquid outlet 226.
Discharge from. This is an apparatus for cleaning the processing liquid.

As shown in FIG. 4, a magnet type separator 23 as another example of the dust removing device 2 introduces a treatment liquid from an inlet 232 while rotating a drum 231 containing a magnet in a direction of an arrow in the figure. , This processing liquid is drum 23
This is a device for removing magnetic dust particles such as iron when passing through the flow path 233 in contact with 1. Drum 231
The dust particles adhered by the magnetic force are scraped off by the scraper 234, while the treatment liquid from which the dust particles have been removed is discharged from the outlet 235.

The above-mentioned dust removing devices 21, 22, 22
23 can be used alone or in combination, and in particular, a combination of the set ring tank 21 and the magnet type separator 23 has a high dust trash removal rate and is most preferable.

However, the dust removing means according to the present invention is not limited to the above-mentioned three forms, and includes other forms. Further, the dust removing device 2 of the present example is provided in the circulation system 11, but the dust removing means according to the present invention is provided in the circulation system 11 and also provided inside or outside the degreasing chemical conversion treatment tank 1 itself. is there.

Returning to FIG. 1, the conversion sludge removing device 3 is
The chemical conversion sludge contained in the treatment liquid that has passed through the dust removing device 2 is removed. The removed chemical conversion sludge is discarded, and the treatment liquid from which the chemical conversion sludge has been removed is sent to the next oil content removing device 4. . The chemical conversion sludge removing device 3 is not particularly limited as long as the sludge concentration of the treatment liquid in the degreasing chemical conversion treatment tank 1 shown in FIG. 1 is suppressed to within 150 ppm and does not contaminate the treatment liquid. It can be used without being used.

In particular, in this embodiment, the chemical conversion sludge removed by the chemical conversion sludge removing device 3 is reused as a compound of a damping material (fusible insulator) of a vehicle panel. Here, the chemical conversion sludge removing device 3 mainly removes the chemical conversion sludge, but the treatment tank 1 also contains a large amount of oil washed off from the body, and is separated by the downstream oil removal device 4. In addition, a part of it is also removed by the chemical conversion sludge removing device 3. Therefore, the wastes removed by the chemical conversion sludge removing device 3 include the chemical conversion sludge and the oil component. In this example, this is reused as a fusible insulator. Details will be described later.

The oil removing device 4 removes the oil contained in the treatment liquid that has passed through the above-mentioned chemical sludge removing device 3. The removed oil is discarded and the treatment liquid from which the oil has been removed is treated. It is sent to the replenishment tank 6 and the water-polar organic solvent separator 5.

The oil removing device 4 that can be used in the present invention includes a heating oil removing device, a coalescer oil removing device, and an ultrafiltration oil removing device. Of these, the heating type oil removal device is preferably applied to an aqueous solution containing a nonionic surfactant as a degreasing component, and when it is heated to a specific temperature or higher, it becomes insoluble in water itself, It is an oil removal device that utilizes the characteristics of nonionic surfactants, such as oil-water separation into two phases, an oil phase composed of a nonionic surfactant and an aqueous phase.

Further, the coalescer type oil removing device enlarges the oil droplets by destroying the water-oil emulsion by passing the oil droplets dispersed in the aqueous solution in a size of several μm through the filter. It is an oil removal device that can be grown and floated and collected.

The ultrafiltration type oil removing device uses ultrafiltration, that is, a filter having a mesh of about 0.01 to 0.001 μm and a low pressure of about 0.5 to 5 × 10 ⁻⁵ Pa. It is an oil removal device using a filtration method in which colloidal particles are separated from a solvent by pressurization or suction filtration.

These oil removing devices 4 can be used alone or in combination, depending on the required degree of oil-water separation.

As shown in FIG. 1, a treatment liquid replenishing tank 6, a water-polar organic solvent separating device 5 and an ion removing device 7 are provided downstream of the oil removing device 4 of the circulation system 11.

The treatment liquid replenishment tank 6 passes through the dust removing device 2, the chemical conversion sludge removing device 3 and the oil content removing device 4, and temporarily stores the degreasing chemical conversion treatment liquid from which dust particles, chemical conversion sludge and oil components have been removed. In addition to this, a polar organic solvent from which water has been removed by a water-polar organic solvent separator 5 to be described later and water from which ionic components have been removed by an ion remover 7 are supplied. Then, a new degreasing / chemical conversion treatment liquid is replenished and adjusted by the pump 16 from the processing liquid tank 15 containing the new degreasing / chemical conversion treatment liquid, and returned to the degreasing / chemical conversion treatment tank 1.

The water-polar organic solvent separating device 5 separates the water component and the polar organic solvent component from the treatment liquid that has passed through the oil removing device 4, and the separated water component is supplied to the ion removing device 7. The separated polar organic solvent component is supplied to the treatment liquid supply tank 6.

The polar organic solvent contained in the degreasing / chemical conversion treatment liquid used in this example is an alcohol, glycol ether or diethylene glycol ether system as described above, and the water-polar organic solvent separator 5 of this example is used. As such, it is desirable to use a method capable of efficiently and inexpensively separating these polar organic solvents from water. Examples of such a separation method include a separation method called pervaporation. As shown in FIG. 5, a separation membrane 51 (non-porous membrane: a membrane having pores of 1 nm or less) 52 having selective permeability is provided on one side (supply side) 52 of a polar organic solvent to be separated and water. The mixed liquid is supplied as it is, and the other side (permeation side) 53 of the separation membrane 51 is evacuated or reduced. Then, using the pressure difference between the supply side 52 and the permeation side 53 as the driving force, the high pressure side (supply side) 52 to the low pressure side (permeation side) 5
When the mixed liquid is moved to 3, the polar organic solvent and the water are separated by interposing the separation membrane 51 having the selective permeability, which has a significantly different diffusion rate for each substance type.

As the above-mentioned separation membrane 51, "a composite membrane having a PVA membrane crosslinked with maleic acid on a support membrane (Japanese Patent Laid-Open No. 59-109204)" and "K salt treatment,"
Mixed film of 80% carboxymethyl cellulose and 20% polyacrylate (J. Memb. Sci., 32, 20)
7 (1987) "," PVA crosslinked on PNA support membrane "
Composite membrane on membrane (J. Memb. Sci., 36, 4
63 (1988) "," Chitosan derivative hollow fiber membrane (Nikkakai (1989)) "," Cobalt alginate membrane (JP-A-61-404) "," Chitosan sulfate membrane (International Membrane Society ( 1987)) "," Polyion complex composite film of polyacrylic acid obtained by hydrolyzing the surface of PNA-based film and ionene-type polycation (JP-A 1-2240).
No. 03) ”and the like.

The ion removing device 7 removes the ionic component from the water component supplied from the water-polar organic solvent separating device 5. The removed ionic component is discarded, and the remaining water is the treatment liquid replenishing tank 6. And are supplied to the rinse tank 8. The ion removing device 7 used in this example is not a special one, and as shown in FIG. 6, a chelating resin capable of removing cation components contained in the degreasing / chemical conversion treatment liquid, such as zinc ions, nickel ions, and manganese ions. Type ion exchange column 71 filled with a cation exchange resin, and an ion exchange filled with a styrene-based strongly basic anion exchange resin capable of removing anion components contained in the degreasing / chemical conversion treatment liquid, such as phosphate radicals and nitrate radicals. An ion exchange column 73 that is equipped with a column 72 and is filled with H-type strongly acidic cation exchange resin, which is a pure water production apparatus that is usually used to increase the purity of water.
And a decarbonation tower 74 and an anion exchange tower 75 filled with an OH type styrene-based strongly basic anion exchange resin.

The coating pretreatment apparatus of this example has the above-mentioned constitution and is equipped with the following five circulation systems. As shown in FIG. 1, first, in the first circulation system 11, the processing liquid in the degreasing chemical conversion treatment tank 1 is degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 → processing It is a circulation system that circulates from the liquid replenishment tank 6 to the degreasing chemical conversion treatment tank 1.

By this first circulation system 11, the degreasing / chemical conversion treatment liquid in the treatment tank 1 is sucked and returned to the treatment tank 1, so that the treatment liquid can be closed and the cost of the material can be reduced. Can be down.

Further, since the processing tank 1 of this example is filled with the degreasing / chemical conversion treatment liquid, the degreasing treatment and the chemical conversion treatment of the automobile body 9 can be performed in a minimum of one step. As a result, the installation space of the device can be saved and the facility cost can be reduced. Moreover, since the process passage time is shortened, the productivity is improved.

Further, by using the degreasing / chemical conversion treatment liquid, the man-hours for managing the pretreatment conditions can be reduced. Also,
By using this degreasing / chemical conversion treatment liquid, the washing process can be significantly reduced, the amount of the cleaning liquid used can be drastically reduced, and the burden on the wastewater treatment process can be reduced.

In the second circulation system 12, the treatment liquid in the degreasing chemical conversion treatment tank 1 is degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 → water-polar organic solvent separation It is a circulation system that circulates from the device 5 to the ion removal device 7 to the rinse tank 8.

By means of this second circulation system 12, the processing tank 1
The degreasing / chemical conversion treatment liquid therein is sucked, the water component is extracted by the water-polar organic solvent separating device 5, and the ion component is removed from the water component by the ion removing device 7, so that the pure water is rinsed in the tank. 8 can be supplied. As a result, the treatment liquid can be closed, the regeneration rate can be improved, the material cost can be reduced, and the cost can be reduced and the burden of the wastewater treatment process can be reduced.

Further, since the processing tank 1 of this embodiment is filled with the degreasing / chemical conversion treatment liquid, the degreasing treatment and the chemical conversion treatment of the object to be treated can be carried out in a minimum one step. As a result, the installation space of the device can be saved and the facility cost can be reduced. Moreover, since the process passage time is shortened, the productivity is improved.

Further, by using the degreasing / chemical conversion treatment liquid, the man-hours for managing the pretreatment conditions can be reduced. Also,
By using this degreasing / chemical conversion treatment liquid, the washing process can be significantly reduced, the amount of the cleaning liquid used can be drastically reduced, and the burden on the wastewater treatment process can be reduced.

The third circulation system 13 guides the liquid in the rinse tank 8 to the dust removing device 2 by the pipe 17 and the pump 18, and thereafter, the dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 It is a circulation system that circulates.

The third circulation system 13 has the following action and effect in addition to the action and effect by the first circulation system 11 described above. That is, the degreasing / chemical conversion treatment liquid in the treatment tank 1 is sucked by the first circulation system 11 and returned to the treatment tank 1, while the liquid in the rinse tank 8 is treated in the third circulation system 13.
Is sucked by and is guided to the dust removing device 2, the chemical conversion sludge removing device 3, and the oil removing device 4, which is the most upstream device, in this example, the dust removing device 2.

As a result, the liquid in the rinse tank 8 becomes dusty,
Sludge and oil can be removed, and the polar organic solvent component contained in the liquid can be returned to the processing tank 1 via the processing liquid supply tank 6. That is, in addition to the treatment liquid, the liquid in the rinse tank 8 can be closed, and the cost can be reduced by reducing the material cost and the burden of the wastewater treatment process can be reduced.

In addition to this, the following circulation system is constructed. As the fourth circulation system 111, the first circulation system described above is used.
In the closed circuit of the degreasing chemical conversion treatment tank 1 → dust removal device 2 → dust removal device 2 → chemical conversion sludge removal device 3 → oil removal device 4 → treatment liquid replenishment tank 6 → degreasing chemical conversion treatment tank 1 This is a circulation system in which a device 5 is added and the polar organic solvent separated by the water-polar organic solvent separating device 5 is supplied to the treatment liquid supply tank 6.

As the fifth circulation system 121, the above-mentioned second circulation system 12, that is, the degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil removing device 4 → water-polar organic solvent separation Circulation in which the treatment liquid replenishing tank 6 is added to the closed circuit of the device 5 → ion removing device 7 → rinsing tank 8 and a part of the pure water from which the ions have been removed by the ion removing device 7 is supplied to the treatment liquid replenishing tank 6. It is a system.

As the sixth circulation system 131, the above-mentioned third circulation system 13, that is, the rinse tank 8 and the degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 → treatment liquid The water-polar organic solvent separator 5 is added to the closed circuit of the replenishing tank 6 → the degreasing chemical conversion treatment tank 1, and this water-
This is a circulation system for supplying the polar organic solvent separated by the polar organic solvent separator 5 to the treatment liquid replenishing tank 6.

As the seventh circulation system 132, the above-mentioned sixth circulation system 131, that is, the rinse tank 8 and the degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 → water- A polar organic solvent separator 5 → treatment liquid replenishing tank 6 → a degreasing chemical conversion treatment tank 1 has a closed circuit provided with an ion removing device 7 to remove ions from the water separated by the water-polar organic solvent separating device 5, This is a circulation system that supplies water from which ions have been removed to the rinse tank 8.

Further, as the eighth circulation system 133, the above-mentioned sixth circulation system 131, that is, the rinse tank 8 and the degreasing chemical conversion treatment tank 1 → dust removing device 2 → chemical conversion sludge removing device 3 → oil content removing device 4 → Water-polar organic solvent separator 5-> treatment liquid replenishing tank 6-> degreasing chemical treatment tank 1 is provided with an ion removing device 7 in the closed circuit to remove ions from the water separated by the water-polar organic solvent separator 5. Then, it is a circulation system for supplying the water from which the ions have been removed to the treatment liquid replenishing tank 6.

As described above, the pretreatment apparatus of this embodiment is
It has three circulation systems, first to third when roughly classified, and eight circulation systems when further classified, so that the composition of the treatment liquid in the degreasing chemical conversion treatment tank 1 is stabilized, and there is no quality variation even in continuous treatment. Allows the formation of treated coatings.

Further, by having the third circulation system, the electric conductivity of the washing water in the rinse tank 8 is kept within the range of 20 μS / cm or less, and oil particles, the treatment liquid, dust particles such as iron are deposited on the surface of the treatment object. Adhesion can be prevented, and the carry-out to the next process can be reduced as much as possible.

Next, a method for treating the waste containing the chemical conversion sludge and the oil removed by the chemical conversion sludge removing device 3 of the above-mentioned pretreatment apparatus for coating will be described with reference to the process chart of FIG.

Since the mixed waste of the chemical conversion sludge and the oil removed by the chemical conversion sludge removing device 3 shown in FIG. 1 contains water, it is first dried to remove the water. In this drying step, the mixed waste of the chemical sludge and the oil content is heated and forcedly dried, or may be naturally dried by sun-drying.

Then, the dried and hardened product of the chemical conversion sludge and the oil thus dried is crushed with a crusher or the like to have an average particle size of 1
Grind to around 100 μm. Although the specific numerical value of the particle size is not limited to the present invention, if the particle size is too large, the mixing in the kneading step when processing into a fusible insulator becomes uneven, or when the sheet is formed into a sheet, Since unevenness may occur on the surface, it is desirable to grind finely.

By the above steps, a mixed pulverized powder of the chemical sludge (mainly iron phosphate) which is a waste product of the pretreatment apparatus for coating and the oil is obtained. Next, this is used to produce a fusible insulator.

Specifically, first, an inorganic material (eg, talc, calcium carbonate, silicon dioxide, etc.), a fiber material (eg, polyester fiber, polyvinyl alcohol fiber, etc.) and an organic material (eg, resin, rubber, oil, etc.) are kneaded. The mixture is mixed using a machine, the molten petroleum asphalt is mixed with the mixture, and the mixture is kneaded at a temperature of about 120 ° C. for about 15 minutes. Here, since the mixed pulverized powder of the chemical conversion sludge and the oil component according to the present invention corresponds to the inorganic substance and petroleum asphalt, it can be blended as a substitute substance for the conventionally blended inorganic substance and petroleum asphalt. For example, petroleum asphalt 60% by weight, inorganic matter 7
In the case of fusible insulators containing 33% by weight of organic substances and 33% by weight of organic materials, all 7% by weight of inorganic substances and 1% by weight of 60% by weight of petroleum asphalt are mixed and pulverized with the chemical conversion sludge and the oil according to the present invention. Replace with flour.
That is, using a kneader, 8% by weight of mixed pulverized powder of chemical conversion sludge and oil, and 33% by weight of fiber material and organic matter
And 59% by weight of melted petroleum asphalt are kneaded to obtain an asphalt mixture.

Next, the kneaded asphalt mixture is rolled by using a calender roll machine or the like to form a sheet having the thickness of the final product. Finally, this sheet-like material is punched using a pressing machine or the like to obtain a final product, a fusible insulator.

FIG. 8 is a diagram showing an example of application of the fusible insulator 50 thus obtained to a vehicle floor panel 51. The fusible insulator 50 is intended for vibration isolation and sound insulation of the vehicle, and is attached to an appropriate place according to the vehicle, but generally, a sealing line of the coating line that has finished the electrodeposition drying furnace, etc. Place it at the desired location. Then, it is softened by passing through the intermediate coating drying oven or the top coating drying oven and is made to fit on the surface of the vehicle panel, and is cooled and hardened when leaving the drying oven. As a result, it firmly adheres to the vehicle panel.

In particular, the fusible insulator 5 of this example
No. 0 replaces some of the inorganic substances such as calcium carbonate and petroleum asphalt with a mixture of the chemical conversion sludge and oil that was discarded in the pretreatment equipment for coating, so that effective use of resources can be achieved and at the same time, disposal is possible. The processing cost can be reduced.

In order to confirm the typical characteristics of the fusible insulator of the present example and the conventional fusible insulator, the fusion appearance, heat fluidity, dipability and vibration damping property were determined by the compounding ratios shown in Table 1 below. As a result, the same performance as that of the conventional one was shown as shown in the table.

[0060]

[Table 1]

The blending amount of the mixture of the chemical conversion sludge and the oil component of this example is preferably 1% by weight to 8% by weight. If the blending amount is too small, the recycling effect of the present invention cannot be sufficiently exhibited, while if the blending amount exceeds 8% by weight, performance deterioration such as swelling and malodor may occur.

The embodiments described above are described for facilitating the understanding of the present invention, and not for limiting the present invention. Therefore, each element disclosed in the above-described embodiment is intended to include all design changes and equivalents within the technical scope of the present invention.

In the example of FIG. 8 described above, the fusible insulator applied to the floor panel of the vehicle is shown, but the damping material of the present invention is not limited to the floor panel, but may be a door, a back door, or the like. Can be applied to.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a coating pretreatment apparatus according to a treatment method of the present invention.

FIG. 2 is a perspective view and a cross-sectional view showing an embodiment of the dust removing device of FIG.

FIG. 3 is a perspective view showing another embodiment of the dust removing device of FIG.

FIG. 4 is a cross-sectional view showing still another embodiment of the dust removing device of FIG.

5 is a conceptual diagram showing an embodiment of the water-polar organic solvent separator of FIG.

FIG. 6 is a conceptual diagram showing an embodiment of the ion removing apparatus of FIG.

FIG. 7 is a process drawing showing an embodiment of the processing method of the present invention.

FIG. 8 is a diagram showing a damping material for a vehicle panel according to the present invention.

[Explanation of symbols]

1 ... Degreasing chemical conversion treatment tank (treatment tank) 2 ... Dust removal device (dust removal means) 3 ... Chemical conversion sludge removal device (chemical conversion sludge removal means) 4 ... Oil content removal device (oil content removal means) 5 ... Water-polar organic solvent separation Apparatus (water-polar organic solvent separating means) 6 ... Treatment liquid replenishing tank (treatment liquid replenishing means) 7 ... Ion removing device (ion removing means) 8 ... Rinse tank 50 ... Fusible insulator (vibration damping material for vehicle panel)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 17/04 503 B01D 17/04 503Z 21/02 21/02 P 61/36 ZAB 61/36 ZAB B03C 1 / 00 B03C 1/00 A 1/02 1/02 C 1/12 1/12 B04C 5/04 B04C 5/04 5/12 5/12 C23C 22/86 C23C 22/86 F term (reference) 4D006 GA25 KA01 KA12 KA72 KB02 KB11 KB13 KB20 MA06 MC27 PA02 PA04 PB08 PB65 PC24 4D053 AA03 AB04 BA01 BB08 BC01 CA01 CB04 DA02 4D059 AA30 BD11 BD18 CC10 4K026 DA19 DA20

Claims (5)

[Claims] 1. A method in which wastes containing chemical sludge and oil are collected from a treatment tank filled with a degreasing / chemical conversion treatment liquid, dehydrated, and then reused as a compound of a vibration damping material for vehicle panels. Method of treating waste. 2. The waste is a treatment tank filled with a degreasing / chemical conversion treatment liquid, a first circulation system for sucking the degreasing / chemical conversion treatment liquid in the treatment tank and returning it to the treatment tank, and the degreasing treatment. A dust removing means for removing dust contained in the combined chemical conversion treatment liquid; a chemical conversion sludge removing means provided in the first circulation system for removing chemical conversion sludge contained in the degreasing combined chemical conversion treatment liquid; Oil content removing means for removing the oil content contained in the processing liquid, and the liquid that has been passed through the dust removing means, the chemical conversion sludge removing means and the oil content removing means provided in the first circulation system is adjusted to the processing tank. A waste material removed by the chemical conversion sludge removing means and the oil content removing means of a coating pretreatment apparatus including a processing liquid replenishing tank for replenishing.
Pretreatment method for pre-painting waste described. 3. The degreasing / chemical conversion treatment liquid comprises an alcohol, glycol ether or diethylene glycol ether-based polar organic solvent, water, zinc ions, phosphate ions, manganese ions, nickel ions, and sodium ions. The method for treating pre-painting waste according to claim 1 or 2, further comprising: 4. A vibration-damping material for a vehicle panel containing petroleum asphalt, an inorganic material, an organic material, and a fiber material, in which a chemical conversion sludge and an oil component discharged from a treatment tank filled with a degreasing / chemical conversion treatment liquid in a coating line are mixed. Damping material for vehicle panels. 5. The chemical conversion sludge and the oil content are 1% by weight to.
The vibration damping material for a vehicle panel according to claim 4, wherein the vibration damping material is 8% by weight.