JPH05247863A - Treating method of wall paper - Google Patents

Abstract

PURPOSE:To accomplish recycling at low cost of raw materials having physical properties suitable for recycling by efficiently releasing resin-impregnated paper layer(s) from the base material paper layer of a wall paper. CONSTITUTION:A wall paper composed of resin-impregnated paper layer(s) and the base material paper layer is made to be a subject to be ground, and it is coarsely ground; the ground product is charged into a jet swirling flow to pulverize the above ground product through mutual collision, and, concurrently, release the pulverized product of the resin-impregnated paper layer(s) from the pulverized product of the base material paper and also grind the respective pulverized product chips to shapes differing from one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating wallpaper.

[0002]

2. Description of the Related Art A wallpaper is generally composed of a resin-impregnated paper layer 51 and a base paper layer 52, as shown in FIG. The resin-impregnated paper layer 51 is composed of a paper layer impregnated with a synthetic resin such as polyvinyl chloride.

The wallpaper shown in FIG. 6 is manufactured, for example, by the method shown in FIG. As shown in the figure, the resin-impregnated paper layer roll paper 54 is impregnated with the polyvinyl chloride resin liquid in the dipping tank 55. The resin-impregnated paper layer roll paper 54 that has been subjected to the impregnation treatment is sent to a pressure bonding roller 57 via a roller 56. In the pressure bonding roller 57, the roll paper 5 for the base paper layer is passed through the roller 58.
9 and the resin-impregnated paper layer roll paper 54 join together. The combined roll papers 54 and 59 are sent to a subsequent processing step as a wallpaper finished product 60.

As can be understood from the above manufacturing method, the resin-impregnated paper layer 51 contains a large amount of polyvinyl chloride resin, and it is desirable to utilize this resin-impregnated paper layer 51 as a recycled product. Further, if separated from the resin-impregnated paper layer 51, the base paper layer 52 can be reused as recycled paper.

However, there is no suitable method for treating this wallpaper, and it is currently discarded as it is and not recycled as a raw material, which is not a preferable situation from the viewpoint of resource saving. ..

[0006]

Therefore, there has been a strong demand for a method of efficiently peeling the resin-impregnated paper layer 51 from the base paper layer 52 and recycling a material having physical properties suitable for recycling at a low cost. ..

[0007]

The present invention has been made in view of the above circumstances, and its gist is to use a wallpaper containing a resin-impregnated paper layer and a base paper layer as a crushed object, After crushing, the coarsely crushed product is put into a jet vortex and crushed while colliding the crushed crushed products with each other to finely crush the coarsely crushed product as well as from the finely crushed product of the base paper to the resin-impregnated paper layer. And a finely pulverized product is pulverized into a shape different from each other.

According to this method, the finely pulverized products obtained are separated from each other and pulverized into different shapes. Therefore, the finely pulverized products of the resin-impregnated paper layer and the finely pulverized product of the base paper are It is possible to easily separate the materials in the separation step, and each of the separated materials can be effectively used. In particular, it has been found that the finely pulverized product of the resin-impregnated paper layer can be used as a substitute for harmful asbestos. That is, this finely pulverized material can be utilized as a heat insulating material that replaces asbestos.

The finely pulverized product of the resin-impregnated paper layer is a mixture of paper and synthetic resin, but there is no problem when it is used as a substitute for the asbestos. In addition, a mixture of the finely pulverized product of the resin-impregnated paper layer and the finely pulverized product of the base paper can be used as a substitute for asbestos.

In the above method, there are various means as a device for forming a jet vortex flow.
The crusher illustrated in Figures 1-3 can be used.

This crusher, as shown in FIGS.
The casing 1 is provided with an inlet portion 2 for supplying gas and a coarsely crushed material (wallpaper that is crushed), a rotary blade 4 supported by a vertical rotating shaft 3, and a crushing portion 5. .. The crushing unit 5 is configured to have a small chamber-like empty chamber 6 along the outer circumference, is provided with a casing 1, and is provided with a narrow gap, and an adjusting plate 7 for adjusting the gap. A discharge unit 8 for discharging the gas and the crushed material that have passed through the crushing unit 5 is provided above the casing 1. In the figure, 9 is a rotating plate, 10 is a partition forming the small chamber-like empty chamber 6, and the adjusting plate 7 is configured to be movable back and forth in the partition 10 toward the casing 1.

In this crusher, gas, usually air, is blown from the inlet 2 by a blower, and the rotating shaft 3 is rotated at high speed by an electric motor (not shown). The charged crushed material is flipped up by the flow of the air flow and the rotary plate 9 to rise, and is cut by the rotary blade 4. further,
The crushed material passes through a gap between the crushing unit 5 and the casing 1 and is introduced into a small chamber-shaped empty chamber 6 that rotates at high speed. In the vacant chamber 6, as shown in FIG. 3, jet vortex flow S is formed in each chamber.

The pulverized products collide with each other by the jet vortex S formed in each of the cavities 6, and are impacted and pulverized. In this crushing process, the resin-impregnated paper layer 51 is separated from the base paper layer 52 while the crushed products collide with each other. Such a phenomenon has never been seen in the processing of an object of this kind (the crushing process peculiar to the present invention is hereinafter referred to as peeling crushing).

As a result of the peeling and pulverization, the resin-impregnated paper layer 51 becomes a spherical pulverized product having a diameter of 1 to 3 mm (hereinafter referred to as an amorphous product), and the base paper layer 52 is a pulverized product of long fiber powder. (Hereinafter referred to as long fiber powder). In this way, by a single crushing process, a wallpaper that is a single input,
It becomes a mixed finely pulverized product of an amorphous body [see (I) of FIG. 4] and long fiber powder [see (II) of FIG. 4] corresponding to each raw material. The amorphous material and the long fiber powder in the mixed finely pulverized product are distinctly different in size and shape, and can be separated extremely easily and efficiently in the subsequent separation step.

While being subjected to such peeling and pulverization, the object is moved upward, and is discharged from the discharge portion 8 after going up several room stages (3 stages in FIG. 1). Since the adjusting plate 7 attached to the partition wall 10 forming the small room-like empty chamber 6 can be moved slightly in the perspective from the casing 1, this is adjusted and set before the operation so that The distance can be set.

This crusher is similar to the turbo mill crusher, except that the rotating shaft 3 is vertically arranged and the gas flow is generated by using a fan of different power. And so on. As described above, since the rotating shaft 3 is installed in the vertical direction and the powder flow is made to flow from the bottom to the top, uneven flow around the crushing unit 5 is reduced, and the ratio of energy used for airflow crushing is reduced. Significantly bigger,
Improves powder efficiency.

Further, since a fan is not attached to the rotating shaft 3 and the gas flow rate is controlled by a separately provided fan, optimum conditions for the pulverization process can be easily obtained and energy consumption can be reduced. It was Therefore, the temperature rise in the crusher is significantly reduced, and the power consumption is also small.

In the discharge part 8 of the crusher, a plurality of classifiers such as cyclones having different performances can be installed in series. In the latter stage of these classifiers, a crushing system can be further configured to collect fine particles using a bag filter or the like, and then release the gas to the atmosphere or recycle it.

Using such a system, if coarse particles are sampled by a classifier in the foreground and fine particles are collected by a classifier after that, the raw material type (the type of wallpaper to be charged) ),
Optimum conditions can be individually selected among various conditions such as the charging speed, the amount of gas blown, the rotation speed of the crusher, and the gap distance between the crushing section 5 and the casing 1.

Next, FIG. 5 shows an outline of an example of the wallpaper processing system constructed by using the crusher.

The wallpaper to be processed in this wallpaper processing system is first charged into the raw material charging hopper 11 and measured by the meter 12 while the vibrating feeder 1 is at a constant rate.
3 into the coarse crusher 14. Here, the wallpaper has a shape that is easy to put in the crusher 15 used in the present invention,
That is, it is roughly pulverized to a major axis of 5 cm or less, preferably a major axis of 2-3 cm.

The coarsely crushed product passes through a temporary storage tank 16 and a screw feeder 17, and is then deironed by a deironing machine 18,
It is put into the crusher 15.

In the pulverizer 15, the coarsely pulverized product is peeled and pulverized by the above-mentioned mechanism, and becomes a finely pulverized mixture which is composed of an amorphous material and a long fibrous powder.

The finely pulverized product thus obtained is sent to the cyclone 21 via the blower device 19 and the controller 20. From this cyclone 21, the rotary valve 22 is passed, and the screw conveyor 23 is passed through the controller 24 or 25 to be fed into the sieve sorter 26 or the sorter 27.

The sieve sorter 26 and the sorter 27 are properly used depending on the type of the raw material wallpaper, or one of them serves as a spare device for the other.

The sieve sorter 26 applies a rotational force to the product to be sorted, and separates the amorphous form and the long fiber powder due to the difference in the rotational motion. On the other hand, as the sorting machine 27, for example, a type that applies a force in the vertical direction to the sorted products and sorts the sorted products according to the difference in vertical movement that occurs can be used.

The sieve sorter 26 is connected to a small cyclone 30 from a cover 28 via a dotted line 29, and air is evacuated from the small cyclone 30. The lines 31, 32, 33 and the line 34 are feedback paths to the crusher 15 via the feeder 35,
The object that needs to be crushed again passes through this path and the crusher 1
5 is re-supplied.

By appropriately operating the operating one of the sorting machines 26 and 27, one of the irregular shaped body and the long fibrous powder is discharged. The discharged one is sent to the product tanks 37, 38 through the transfer path 36. That is, when the irregular shape is discharged, it is accumulated in the product tank 37 via the controller 39. When the long fiber powder is discharged, it is accumulated in the product tank 38 via the controller 40.

In this way, the accumulated products are conveyed through the feeders 41 and 42 to a later bag-filling step (not shown).

[0030]

EXAMPLES In the following examples, as the crusher 15, an ultra rotor type crusher model III A type (trade name) manufactured by Altemburger, and as a sieve sorter 26, a rotary shifter type (trade name), a sorter 27 A low head type (trade name) was used as the above to construct a wallpaper processing system, and the wallpaper was crushed as follows.

The crusher 15 has the same structure as described above with reference to FIGS. 1 to 3, and each adjusting plate 9 can be moved in the radial direction to adjust the gap between the crushing section 5 and the casing 1.

Here, depending on the type of wallpaper to be treated, the gap between the crushing section 5 and the casing 1 is set to be 2-12 mm, the rotation speed is adjusted between 1,200-2,300 rpm, and the gas is As room temperature air, a blower was used to adjust the air flow rate between 4,000 and 20,000 m ³ / hr, and the raw material inlet 2 was used to roughly pulverize the wallpaper to a size of 5-10 mm. It was charged at 800 Kg / hr.

(Example-1) Wallpaper having the structure shown in FIG. 6 was pulverized. Set the gap between the crushing section 5 and the casing 1 to be 3 to 6 mm, and set the rotation speed to 1,500.
~ 2,300 rpm, the gas is room temperature air, and a blower is used to blow 10,000 to 15,000 m ³
/ Hr and adjust from the raw material charging port 2 to 5-10 in advance.
Wallpaper roughly crushed to the size of mm is 300-600Kg /
It was put in at hr. A finely pulverized product could be obtained from the discharge part 8 3 to 5 seconds after the charging. This finely pulverized product is an irregular shaped body with a diameter of 1 to 3 mm from the resin-impregnated paper layer 51,
Easily separated into 20-60 mesh long fiber powder from 2.

The present invention is not limited to the above-mentioned embodiments, and all changes, modifications and additions obvious to those skilled in the art are included in the scope of the technical idea of the present invention. For example, the wallpaper to be treated in the present invention is not limited to that shown in FIG. 6, and any wallpaper having a similar resin-impregnated paper layer and base paper layer can be peeled and pulverized by the present invention. Further, a rotary finger having the same shape and the same material as the rotary blade 4 may be provided on the rotary shaft 3 above the crushing unit 5.
The rotary blade 4 and the rotary finger can be used together in this way, but of course either one may be used. Further, the number of blades of these rotary blades 4 etc. can be appropriately set within a range of 5 to 20, preferably 5 to 10. When the rotary finger is provided on the rotary shaft 3, it has a function of dropping the re-ground product downward and performing the crushing again at the upper part of the crushing section.

[0035]

As is apparent from the above description, according to the present invention, the wallpaper is exfoliated and pulverized by the single pulverization processing device, and the irregular shape of the resin-impregnated paper layer and the long fiber material from the base paper are crushed. It becomes a finely pulverized product mixed with powder. The amorphous material and the long fiber powder in the mixed finely pulverized product have distinctly different sizes and specific gravities, and can be separated very easily and efficiently in the subsequent separation step. Therefore, it is possible to efficiently separate the resin-impregnated paper layer from the base paper layer of the wallpaper, and at the same time, recycle the material having physical properties suitable for recycling at low cost. In particular,
The finely pulverized product of the resin-impregnated paper layer can be used as a heat insulating material and can be expected as a substitute for harmful asbestos.

[Brief description of drawings]

FIG. 1 is a perspective view conceptually showing a crusher employed in a method for treating wallpaper according to the present invention.

FIG. 2 is a plan view conceptually showing a crusher employed in the wallpaper processing method according to the present invention.

FIG. 3 is a plan view conceptually showing a state of peeling and pulverization of a pulverizer adopted in the wallpaper processing method according to the present invention.

FIG. 4 is an enlarged view for explaining an amorphous body [(I) in the figure] and a long fibrous powder [(II) in the figure] obtained by the present invention.

5 is a schematic diagram showing a wallpaper processing system constructed by using the crusher of FIGS. 1 to 3. FIG.

FIG. 6 is a cross-sectional view of wallpaper treated according to the present invention.

FIG. 7 is a conceptual diagram illustrating a process of manufacturing a wallpaper processed according to the present invention.

[Explanation of symbols]

 1 Casing 2 Inlet 3 Rotating Shaft 4 Rotating Blade 5 Grinding Part 6 Vacancy 7 Adjusting Plate 8 Discharging Part 9 Rotating Plate 11 Raw Material Input Hopper 14 Coarse Grinding Machine 15 Grinder 21 Cyclone 26 Flue Sorter 27 Sorter 37, 38 Products tank

Claims (1)

[Claims] 1. A wallpaper comprising a resin-impregnated paper layer and a base paper layer is used as an object to be crushed, the wallpaper is roughly crushed, and then the crushed product is put into a jet vortex flow, and the crushed products are crushed while colliding with each other. By crushing the coarsely pulverized product, the finely pulverized product of the resin-impregnated paper layer is separated from the finely pulverized product of the base paper, and the finely pulverized products are pulverized into different shapes. Processing method.