JP2002161166A - Method for recycling pet bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a recycle method for providing a polyester resin composition capable of manufacturing a bottle of an equal quality again from a used PET bottle (bottle to bottle). SOLUTION: A substantially completely cleaned waste PET bottle flake is mixed with a monomer PEN flake or a substantially completely cleaned waste PEN flake in a predetermined ratio. The mixed flake, which is dried to 50-80 ppm by a reduced-pressure vacuum drying, is kneaded in a twin kneading extruder heated to 250-280 deg.C filled with dried inert gas with addition of a condensation agent. Although hydrolysis occurs due to incomplete drying of both PET and PEN, two benzene nuclei possessed by a dicarboxylic acid of the PEN produced by the hydrolysis causes a strong induced linkage aiding an ester linkage by the action of the condensation catalyst to link between the PETs prior to melting, thereby preventing reduction of entire molecular weight and recovering an IV value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for recycling PET (polyethylene terephthalate) bottles,
In detail, an equivalent bottle can be manufactured again from a used PET (polyethylene terephthalate) bottle (bottle
The present invention relates to a recycling method for providing a polyester resin composition.

[0002]

2. Description of the Related Art The above-mentioned "bottle to PET" in PET bottles
“Bottle” is a compelling advocacy in the recycling industry based on the deadlock of the PET recycling business that started in April 1997.

That is, conventionally, collected PET bottles are sorted, reduced in volume and compressed by municipalities into PET bottle bale (for example, about 40.times.40.times.60 cm) and handed over to a recycling company. The re-commercialization company unpacks the product, separates foreign substances such as metal and PVC bottles, and after washing, further separates the colored bottles and then pulverizes them to separate labels, aluminum and the like. After further washing, plastics other than polyethylene terephthalate are separated, dewatered and dried, and then metal is further separated by magnetic force to obtain flakes or pellets.

[0004] The flakes are deteriorated and have a low molecular weight, cannot be used again for PET bottles, are sent to a user, and the flakes or pellets are used as a raw material, and the flakes are used as packaging materials for carpets, eggs, etc. PE such as short fiber
Products other than T bottles.

According to the current recycling method described above, the collection yield of the re-commercialization company is low due to the large amount of dust and foreign matter, and the problem of foreign matter is not completely solved. There is a large variation in quality due to the mixing amount of

[0006] In addition, because the cost of recycling is high, the price is expensive when reflected in the sales and retail prices of recycled products (according to the domestic recycling law). The demand for recycled products is not so high and it has not been a decisive factor for recycling.
Although the collection volume and recycling rate have been increasing year by year since the start of sorted collection in 1997, there is a problem that exit demand has leveled off.

[0007] Therefore, not only high purity, but also naturally deny visual deterioration and return to the original quality (higher molecular weight)
The realization of “to bottles” can expand the options of the recycling industry, and eventually break the deadlock of the re-commercialization business.

This “bottle-to-bottle” proposal is disclosed in
No. 00-169623.

[0009] The recycling method is to use a used PET bottle recovered from the city as bis-β-hydroxyethyl terephthalate, which is an intermediate raw material for producing a polyethylene terephthalate product, so that a high-purity polyethylene terephthalate product can be produced again. What did
The specific contents are as follows: a pretreatment step of subjecting used polyethylene terephthalate waste to pretreatment such as grinding, washing, and foreign matter separation to obtain crude polyethylene terephthalate flakes; and an excessive purification and / or Alternatively, a depolymerization step in which crude ethylene-glycol is added to carry out depolymerization in the presence of a catalyst to obtain crude bis-β-hydroxyethyl terephthalate (BHET), and a double mixed solution of the obtained crude BHET and crude ethylene glycol A foreign matter removing step of removing solid foreign matter such as polyethylene, polystyrene, polypropylene and vinyl chloride other than polyethylene terephthalate resin and / or metal, glass, sand and / or sediment, and the obtained crude BHET and Crude ethylene glycol A pre-purification step of removing colored and / or dissolved ions from the mixed solution of the above, and a distillation / evaporation operation of the double mixed solution having undergone the pre-purification step to evaporate / evaporate ethylene glycol to remove concentrated BHET. Or by cooling the double mixed solution to below 10 ° C.
A BHET concentration step of obtaining concentrated BHET by solid-liquid separation of ethylene glycol and BHET after crystallization of HET,
A BHET purification step of obtaining purified bis-β-hydroxyethyl terephthalate by evaporating in vacuo such that the residence time of the concentrated BHET in the evaporator is 10 ° C. or less at a temperature of 0 ° C. or less, and the obtained purified BHET and/
Alternatively, a high-purity polyethylene terephthalate polymer is obtained from polyethylene terephthalate waste through a polyethylene terephthalate polymer production step of subjecting the concentrated BHET obtained in the BHET concentration step as a raw material to melt polycondensation to obtain a high-purity polyethylene terephthalate polymer. According to the recycling method of the present invention, after returning the used polyethylene terephthalate product to the intermediate material of the polyethylene terephthalate product group,
Since a commercial polyethylene terephthalate product group can be produced again, an almost complete “closed recycling system” is possible, and the final disposal of used polyethylene terephthalate products as general and industrial waste will be incinerated and landfilled in the future. You don't have to. For this reason, resource and energy savings, which are the final objectives, can be achieved. "
It has said.

As an example, the limit particle size I shown
V0.695 is equivalent to commercially available 0.693.

[0011]

The above-mentioned "pretreatment step", "depolymerization step", "contaminant removal step", "prepurification step", "BHET concentration step", "BHET purification step",
A series of steps consisting of a “polyethylene terephthalate polymer production step” is extremely complicated in terms of equipment and operation, and higher cost is a concern.

In particular, the BHET concentration step and the BHET purification step based on the removal of foreign substances brought into the depolymerization step and the addition of excess ethylene glycol fall under the conventional category of “reconstruction after dismantling to the original state”. It does not come out and can be regarded as an inefficient and expensive extra step that requires much time and effort compared to virgin.

Recycling requires low cost,
In this respect, the practicality is considered to be extremely low.

The present invention has been made in view of the circumstances described above, and the object is to greatly simplify the process for achieving high purity and high molecular weight in both equipment and chemical operations, An object of the present invention is to provide a low-cost recycling method suitable for recycling.

[0015]

In order to achieve the above object, a method for recycling a PET bottle according to the present invention is directed to a method for recycling monomer PET into almost completely washed waste PET bottle flakes.
N flakes or waste PEN flakes that have been almost completely washed are mixed in a predetermined ratio, and the mixed flakes are dried to 50 to 80 ppm by vacuum drying under reduced pressure.
A twin-screw kneading extruder heated to 80 ° C. is kneaded with a condensing agent added in a dry inert gas filled with water. Since neither PET nor PEN is completely dried, hydrolysis occurs, but the hydrolysis immediately occurs. The two benzene nuclei of the dicarboxylic acid of the generated PEN assist the ester bond by the action of the condensation catalyst to cause a strong attractive bond, bond between the PET before melting to prevent a decrease in the overall molecular weight and to recover the IV value. It is a smooth one.

The progress is shown in the following equation 1.

(Equation 1)

[Action] Since it does not involve depolymerization of PET once,
In the early stage of the disassembly of the hydrolysis, the result that the IV value was returned to the original value or more was obtained by a novel means that the flakes are bonded via PEN.

This is because, in this copolymerization, a naphthalene nucleus of PEN is interposed as a joint material in a PET chain having a benzene nucleus, that is, a so-called higher-grade material is joined.

Almost completely washed flakes are excellent raw materials in their own right and ready for use, and can be used without deliberately dismantling.

Naturally, the equipment and processes are largely omitted (only vacuum vacuum drying equipment and twin-screw kneading extruder are required besides the washing, pulverizing and classifying equipment), and the cost is greatly reduced (1/10 or more). To achieve.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The investigation process leading to the implementation of the present invention will be described below.

Usually used for virgin in the industry.IV (d1 /
g) value 0.8PET bottles made from pellets
Calculate the average IV value of two samples of crushed material (flakes)
Where0.729  (Deteriorated by about 10%). Not surprisingly,
The rake is made by the applicant's washing / classifying means described below.
It is almost completely washed.

Using the above flakes, 100 ppm or less
Dry under reduced pressure (vacuum) and heat to 250-280 ° C.
Use a screw extruder to make a polymer alloy,
Pellet with sizing die
I tried. When the average IV value of two samples of this pellet was determined
Roll, both0.706  Met.

Using the pellet having an IV value of 0.706,
Dry under reduced pressure (vacuum) and heat to 250-280 ° C.
Turn into a polymer alloy state with a shaft kneading extruder,
300 pp condensation catalyst (manganese acetate, etc.)
m with a gear pump and further with a screw
Pelletized with a kneading sizing die. This peret
The average IV value of the two samples0.754  Met.

On the other hand, the above operation was carried out without injecting a condensation catalyst into PE.
N flakes (naturally almost completely washed
Run under a blend of 15% (relative to PET)
The average IV value of the two pellets was determined.
Oh,0.782  Met. The melting point of PET is 264 ° C., and PEN is 2
72 ° C.

Further, the above operation is referred to as "catalyst" (250 pp).
m) + “PEN” (15%)
The average IV value of the two samples was determined,0.803  Met.

The "catalyst" + "PEN" to the 0.803 above the virgin value 0.8 (0.8 or more is possible bottles of stretch molding is common knowledge) can become found here.

Next, in order to examine the influence of unavoidable hydrolysis, the above-mentioned "catalyst" + "PEN" were mixed with a kneading twin-screw extruder in the range of 265 to 270 ° C and the dry moisture content of a vacuum dryer at 80 to 100 ppm. The variation due to a slight difference in water content was confirmed in the range of.

In systemization, this temperature setting
(Sensor measurement system)
Iv) Set the IV value of the resulting pellets in a preferred range.
This is because it is considered. (1) At 270 ° C. and 100 ppm, the average I of two samples
V value is0.704  Met. (2) At 265 ° C. and 100 ppm, the average I of two samples
V value is0.702  Met. (3) In the case of 265 ° C. and 80 ppm, the average IV of two samples
value is,0.704  Met. Is the condition of (3) the least variation?
Was.

It can be seen that the higher the degree of drying, the better.

Next, the kneading twin screw extruder was set at 270 ° C.
Of "catalyst such as manganese acetate" + "PEN"
The preferred formulation of the two additives was investigated in three cases. (A) Average of two samples with 10% PEN and 330 ppm catalyst
The IV value is0.783  (B) Average of two samples with 12% PEN and 350 ppm catalyst
The IV value is0.798  (C) Average of two samples with 15% PEN and 300 ppm catalyst
The IV value is0.809  Met.

It is apparent that the larger the amount of PEN added, the higher the IV value.

Next, the influence of moisture absorption during the transportation from the vacuum dryer to the kneading twin-screw extruder was examined.

The sample was the above-mentioned (c) PEN 15%, catalyst
Take it with 300ppm and 80ppm dryness
Was. All of them are stored tightly in plastic bags after drying. (A) In the case of 1 hour after drying the pet flakes, the average of two samples
The average IV value is0.796  Met. (B) One and a half hours after drying the pet flakes, two samples
The average IV value is0.792  Met. (C) In the case of 2 hours after drying the pet flakes, the average of two samples
The average IV value is0.772  Met.

As a result, it is understood that the transfer from the vacuum dryer to the extruder requires passing through an inert gas. Further, oxidation of the catalyst at a high temperature occurs, so that a catalyst is also required.

From the above findings, monomer PEN flakes or almost completely washed waste PEN flakes are mixed in a predetermined ratio with the almost completely washed waste PET bottle flakes, and the mixed flakes are dried under reduced pressure by vacuum drying at 50 to 8%.
The thing dried to 0 ppm was kneaded with a condensing agent in a dry inert gas filled in a twin-screw kneading extruder heated to 250 to 280 ° C.

The intrinsic viscosity IV of the recycled PET polyester resin composition of the present invention is calculated by using sodium trifluoroacetate added to 0.1% (W / v) HFIP as a solvent. With this system, the PET is not decomposed and the molecular weight can be determined.

The following PBT viscosity equation is used.

After correcting the polydispersity of the PBT,
Viscosity equation corresponding to monodispersed sample [IV] = 5.11 × 10^-4M^0.70  [IV]: intrinsic viscosity, M: molecular weight, HFIP: f
Xafluoroisopropanol (or hexafluoro
B-2-propanol), PBT is polyprylene terev
Tarate.

To prevent aggregation, sodium trifluoroacetate is added to 0.1% (W / v) HFIP.

The details of the analysis method are as follows under the above-mentioned solvent. Apparatus: Atlantic viscometer (Ubbelohde viscosity tube improved type) Viscosity measuring apparatus (manufactured by Rigo Co., Ltd.) Sample concentration: 0.5 g / 100 ml Dissolution temperature: 135 ° C. × 40 minutes Measurement temperature: 25 ° C.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

In the present invention, waste PET bottle flakes and waste PEN flakes must be almost completely washed to ensure high purity.

The present applicant has developed such means in the case of a bottle, and has disclosed in Japanese Patent Application No. 2000-274844 and Japanese Patent Application No.
000-300511, which is introduced here.

First, as shown in FIG. 1, the outer surface of the waste PET bottle (Q) is washed with a cleaning liquid (ST1), and then the body of the waste PET bottle (Q) is divided into two or three parts (S1).
T2) and then each divided bottle part (Q1, Q2, Q
The inner surface of 3) is washed with a washing liquid (W) (ST3), and the washed divided bottle parts (Q1, Q2, Q3) are pulverized into small pieces to produce flakes (ST4). Then, the mouth of the discarded PET bottle (Q) is cut off after the outer surface of the bottle (Q) is washed until it is fragmented.

As shown in FIGS. 2 to 8, the recycling apparatus used for carrying out the above-mentioned recycling method is provided with a cleaning apparatus 10 capable of cleaning before grinding the waste PET bottle (Q). ing. And the cleaning device 1
0 is the outer surface cleaning means 11 and PET as shown in FIG.
It is provided with a bottle dividing means 51 and an inner surface cleaning means 91, and is formed so that the outer surface of the discarded PET bottle (Q) can be cleaned and the inner surface can be cleaned after dividing the body of the bottle (Q) into two (or three). ing.

In this embodiment, as a waste PET bottle (Q), a vale-shaped used PE that has been compression-deformed is used.
T bottles have been selected. Then, in order to properly clean the inner surface according to the size of the size, the large size waste P
ET bottle (Q) (for example, PE having an inner volume of 2 liters)
T bottle) divided into three, medium size (for example, the inner volume is 500
Milliliters) and small size (eg, 35
(0 ml) PET bottle is divided into two.

The sorting step is performed manually when the waste PET bottle (Q) is conveyed toward the outer surface cleaning means 11 by the conveyor 2 shown in FIGS. Colored PET bottles, non-PET bottles, and the like are removed from the conveyor 2.

Next, each component of the cleaning apparatus 10 will be described in detail.

First, as shown in FIG. 3, the outer surface cleaning means 11 includes a cleaning tank 12, a rotating drum 13 with blades, a guide member 15, and a cleaning liquid spraying means 16, and comprises a waste PE.
The outer surface of the T bottle (Q) can be washed with the washing liquid (W).

More specifically, the cleaning tank 12 has an opening at the top, and is formed so as to be able to store a cleaning liquid (W). At the bottom of the washing tank 12, a screw device 1 for discharging soil, sand, etc., which has fallen from the outer surface of the waste PET bottle (Q) by the outer surface washing and settled to the bottom of the tank, to the outside.
9 are provided. Note that water is selected as the cleaning liquid (W). You may use the waste juice which has high washing | cleaning ability, without spoiling a natural environment.

The cleaning liquid (W) in the cleaning tank 12 overflows when it exceeds the set water amount and is collected in a circulation tank (not shown). The cleaning liquid (W) collected in the circulation tank is filtered and then supplied to the cleaning liquid spraying means 16.

The rotating drum 13 with blades is formed in a cylindrical net cage shape, and is rotatably provided above the washing tank 12. The rotating drum 13 is rotated at a predetermined speed in a clockwise direction in FIG. 3 by a driving unit (not shown).

Further, on the outer peripheral portion of the rotary drum 13,
A predetermined number of blades 14 are attached at predetermined intervals,
The cleaning liquid (W) is formed so as to be able to stir and cooperate with the guide member 15 to move in the cleaning liquid (W) toward the outlet 12B while holding the waste PET bottle (Q). The guide member 15 has a semicircular cross-section with an open upper portion, and has a net cage shape.

The cleaning liquid spraying means 16 is installed above the rotating drum 13 and can spray the cleaning liquid (W) supplied through the cleaning liquid supply pipe 17 from the plurality of nozzles 18 toward the rotating drum 13. Is formed.

Therefore, the waste PET bottle (Q) dropped from the conveyor 2 to the inlet 12A of the washing tank 12 is
In a situation where the cleaning liquid (W) is sprayed from the cleaning liquid spraying means 16, the cleaning liquid (W) stirred by the blades 14 of the rotating drum 13 is moved. Thereby, the outer surface of the waste PET bottle (Q) is sufficiently washed, and soil and sand attached to the outer surface are removed.

Thus, the waste PE from which the soil and sands have been removed
The T bottle (Q) is discharged from the outlet 12B of the washing tank 12, and after being separated by the sorting / transporting section 21 according to the size of the transport route, is sent to the PET bottle dividing means 51 to be divided into two or three. .

Here, as shown in FIGS. 2 and 4A and 4B, the sorting / conveying section 21 sorts the waste PET bottle (Q) into one of large, medium and small sizes. Sieves (22, 23, 24) and sieve vibrating means 25 arranged in upper and lower three stages, and large and small screens selected by each sieve (22, 23, 24).
Medium and small size waste PET bottles (Q) are first, second,
It is composed of a transport conveyor 32 that can be transported toward the PET bottle dividing means 51 along a transport route defined by the third guide rails (35, 36, 37).

Specifically, the uppermost sieve (upper sieve 22)
Are formed in a mesh shape that does not allow the large-sized waste PET bottle (Q) to pass through, but allows the medium-size or smaller to pass. More specifically, the upper sieve 22 is a mesh of 9 cm to 10 cm.

A sieve lower than the upper sieve 22 (middle sieve 2
3) is formed in a mesh shape that does not allow a waste PET bottle (Q) of a medium size or larger to pass through, but allows a small PET bottle or smaller to pass. More specifically, the middle sieve 23 is a 6 cm mesh.

The lowermost sieve (lower sieve 24) is formed in a mesh shape that does not allow the waste PET bottles (Q) having a size smaller than the size to pass through, but allows the size smaller than the small size to pass. More specifically, the lower sieve 24 is a 3 cm mesh.

Below the lower sieve 24, a storage box 3 for storing a product that has passed through the sieve 24 (for example, a small lactic acid beverage manufactured by Yakult Co., Ltd.) is arranged.

As shown in FIG. 4B, each of the sieves (22, 23, 24) has a projection shaft 8 projecting from both side surfaces, and each projection shaft 8 is a stationary body (frame). Each of the bearings 7 installed on the mounting portion 6 of 4) is supported movably in the directions of arrows A and B.

The sieve vibrating means 25 is connected to each of the sieves (22, 23, 24) via a connecting member 39, and can vibrate the respective sieves (22, 23, 24) in the directions of arrows A and B. Is formed.

More specifically, the sieve vibrating means 25 includes: a motor 26 fixed to the frame 4 via the mounting member 5;
A disk 27 mounted on the rotation shaft of the motor 26, a first engagement shaft 28A protruding from a position distant from the center of the disk 27, a first engagement shaft 28A and a connecting member 39; And a connecting rod 29 connecting the second engagement shaft 28B on the side.
By rotating the motor 26, each sieve (22, 23,...) Is driven by a slider / crank mechanism including the disc 27, the first and second engagement shafts (28A, 28B), and the connecting rod 29.
24) vibrates in the directions of arrows A and B in FIG.

The transport conveyor 32 is shown in FIGS. 4A and 4B.
As shown in FIG. 3, a pair of belt wheels (33)
A, 33B), a belt 34 wound around both belt wheels (33A, 33B), and driving means (not shown) for rotating the belt wheel 33A counterclockwise in FIG. 4A. ing. The discarded PET bottle (Q) placed on the upper part of the belt 34 is first or second depending on its size.
It is guided by the second and third guide rails (35, 36, 37) and transported to the first, second, and third divisions (53, 54, 55) of the PET bottle division means 51.

For example, a large-sized waste PET bottle (Q) that has not passed through the upper sieve 22 slides down on the guide inclined plate 45 shown in FIG. 5A and is placed on the belt 34 of the conveyor 32. Are guided by the first guide rail 35 and conveyed to the first dividing portion 53 of the PET bottle dividing means 51.

Similarly, a medium-sized waste PET bottle (Q) that has passed through the upper sieve 22 but has not passed through the middle sieve 23 slides down on the guide inclined plate 46 shown in FIG. 32 on the belt 34 of the second
It is guided by the guide rail 36 and is conveyed toward the second dividing part 54 of the PET bottle dividing means 51.

The small-size waste P which has passed through the upper sieve 22 and the middle sieve 23 but has not passed through the lower sieve 24
The ET bottle (Q) is a guide inclined plate 47 shown in FIG.
After sliding down, it is placed on the belt 34 of the conveyor 32 and guided by the third guide rail 37 to be PET.
It is conveyed toward the third division 55 of the bottle dividing means 51. It should be noted that among the discarded PET bottles (Q) conveyed by the conveyor 32, those whose mouths face backward are to be modified by the operator so that the mouths face forward.

Next, as shown in FIGS. 6 and 7, the PET bottle dividing means 51 comprises a first, a second, and a third dividing section (5).
3, 54, 55), a slider 65 on which cutting blades (66, 67, 68) and a bottle holder 69 are mounted, and a slider driving means 72,
The body of the waste PET bottle (Q) can be divided into two or three parts.

In this embodiment, the entrance side locking means 81 is provided so that the discarded PET bottles (Q) enter the divided portions (53, 54, 55) of the inclined support plate 52 one by one. In addition, a positioning means 85 for positioning the waste PET bottle (Q) in each of the divided portions (53, 54, 55) is provided. Further, the PET bottle dividing means 51 is formed so that the mouth of the discarded PET bottle (Q) can be cut.

As shown in FIG. 6, the inclined support plate 52 is formed such that the discarded PET bottle (Q) sent by the conveyor 32 uses the own weight as a moving force to move the first, second, and third divided portions (53, 54). , 55) are inclined downward. Each division part (53, 54, 55)
Are defined by standing walls 56 as shown in FIG. Each divided portion (53, 5
4, 55), cutting blade passage holes (62, 63, 64) are formed in the through-holes corresponding to the divided portions and the mouth cut portions.

Note that, below the cutting blade passage hole 64, a housing box 9 for housing the cut mouth is disposed.

Next, the slider 65 is provided so as to be movable only in the directions of arrows C and D by guide means (not shown). The slider 65 has a common cutting blade 66 for cutting the body of each of the waste PET bottles (Q) put in the first, second, and third divided portions (53, 54, 55), and a first cutting blade 66.
Individual cutting blade 67 for cutting the lower part of the trunk of the large-sized waste PET bottle (Q) placed in division 53
And a mouth cutting blade 68 for cutting the mouth (Q0) of the discarded PET bottle (Q).

Each of the discarded PEs put in the first, second, and third divided portions (53, 54, 55) is provided on the slider 65.
A bottle holding portion 69 for holding down the T bottle (Q) by using a spring force at the time of cutting is mounted.

As shown in FIG. 7, the slider driving means 72 includes a crankshaft 73, a connecting rod 74 connecting the crankshaft 73 and the slider 65, a flywheel 75 attached to the crankshaft 73, and a crankshaft. A driving means (not shown) for rotating the slider 73 is provided, and the slider 65 is configured to be movable in the directions of arrows C and D.

As shown in FIG. 6, the entrance side locking means 81 includes a locking member 82 capable of locking and unlocking the waste PET bottle (Q) sent from the conveyor 32, The member 82 includes a drive cylinder 83 that can move in the directions of arrows C and D, and the locking member 82 can be positioned at the locking position shown in FIG. 6 according to a control signal from a control unit (not shown) and can be moved from the locking position. It is formed so as to be moved in the direction of arrow C and positioned at the unlocked position.

Next, the positioning means 85 includes a position restricting member 86 and a drive cylinder 87 which can move the position restricting member in the directions of arrows C and D, and moves in accordance with a control signal from a control unit (not shown). The restricting member 86 is formed so that it can be positioned at the closed position shown in FIG. 6 and can be moved from the closed position in the direction of arrow C to the open position.

Here, with the position regulating member 86 of the positioning means 85 being positioned at the closed position where the waste PET bottle (Q) can be locked, the locking member 82 of the entrance side locking means 81 is engaged. After being moved from the stop position in the direction of arrow C and moving to the direction of arrow D after a lapse of the set time and returning to the locking position, the waste PET bottle (Q) waiting on the belt 34 of the conveyor 32 becomes 1 Pieces, the corresponding divisions (5
3, 54, 55) and is positioned at a predetermined cutting position by the position regulating member 86.

Next, in this state, when the slider 65 is lowered in the direction of arrow D by the slider driving means 72, the discarded PET bottle (Q) positioned at each of the divisions (53, 54, 55) is removed. The body is divided into two (or three) by the cutting blades (66, 67, 68) while being held by the bottle holding part 69, and the mouth is cut.

For example, as shown in FIG. 9, a large-sized waste PET bottle (Q) has its mouth (Q0) cut off and is divided into three parts, and three divided bottle parts (Q1,
Q2, Q3). In addition, medium and small size waste PET
The bottle becomes two separate bottle parts.

After the cutting, the slider 65 is raised and positioned at the standby position, and the position regulating member 86 is moved in the direction of arrow D to be positioned at the open position. As a result, each of the divided bottles (Q1, Q2, Q3) whose mouth is cut off and whose body is divided into two (or three) is slid down on the inclined support plate 52 and sent to the inner surface cleaning means 91.

Next, as shown in FIG. 6, the inner surface cleaning means 91 includes a cleaning tank 92, a stirring screw 93 placed in a cylindrical net basket 98, and a stirring screw driving means 94.
And cleaning liquid spraying means 95, and each divided bottle portion (Q
1, Q2, Q3) can be cleaned with a cleaning liquid (W). In this embodiment, the inner surface cleaning means 91
Is an ultrasonic vibrating means 1 capable of ultrasonically vibrating the cleaning liquid (W).
21 (ultrasonic vibrator, diaphragm). In addition, lye which has high washing ability without damaging the natural environment is selected as the washing solution. It is also possible to select water and the like.

More specifically, the cleaning tank 92 has an opening at the top, and is formed so as to be able to store a cleaning liquid (W). At the bottom of the washing tank 92, a discharge screw device 99 for discharging foreign matter to the outside is provided. The cleaning liquid (W) in the cleaning tank 92 overflows when it exceeds the set water amount and is collected in a circulation tank (not shown). After the washing liquid (W) collected in the circulation tank is filtered,
The cleaning liquid is supplied to the spraying means 95.

The stirring screw 93 is formed so as to move the divided bottles (Q1, Q2, Q3) inserted from the inlet 92A toward the outlet 92B while stirring the washing liquid (W) in the washing tank 92. ing. This stirring screw 93
Is rotated in a predetermined direction by the driving means 94 in the mesh tube 98.

The cleaning liquid spraying means 95 is
The cleaning liquid (W) supplied through the cleaning liquid supply pipe 97 is sprayed from the plurality of nozzles 97N toward the screw 93.

Therefore, the divided bottles (Q1, Q2, Q3) dropped from the inlet 92A of the washing tank 92 are stirred by the stirring screw 93 under the condition that the washing liquid (W) is sprayed by the washing liquid spraying means 95. The cleaning liquid (W) is moved toward the outlet 92B. As a result, the inner surface of each divided bottle portion (Q1, Q2, Q3) is sufficiently washed, and residues such as oil, soy sauce, and soft drink adhering to the inner surfaces are removed.

The divided bottle portions (Q1, Q2, Q3) whose outer and inner surfaces have been washed are lifted while being sprinkled with water by a screw conveying device 101 shown in FIG. Fragmented. And
Labels, PET powder generated at the time of pulverization, and the like are removed from each strip to form flakes as a raw material for molding.

The screw conveying device 101 includes a cylindrical portion 102 extending obliquely upward, a mesh-shaped screw 103 rotatably provided in the cylindrical portion 102, a screw driving device 104, and a screw 103. A rinsing unit 106 for applying water to rinse each of the divided bottle portions (Q1, Q2, Q3) conveyed to the container, and a rinsing water recovery tank 108 communicating with the inside of the cylindrical portion 102 through a mesh-shaped partition plate 107. The divided bottle portions (Q1, Q2, Q3) can be supplied from the outlet portion 105 to the crusher 111. The crusher 111 is of a popular type manufactured and marketed.

Then, the waste PET is removed by the outer surface cleaning means 11.
The outer surface of the bottle (Q) is washed with a washing liquid (W), and then PE
The body of the discarded PET bottle (Q) is divided into two or three parts by the T bottle dividing means 51, and then the inner surface cleaning means 91
The inner surface of each divided bottle portion (Q1, Q2, Q3) is washed with the cleaning liquid (W), so that the outer surface of the waste PET bottle (Q) can be sufficiently washed, and the divided waste PET bottle (each divided bottle portion) Can be sufficiently cleaned with the cleaning liquid (W).

Since the number of cut portions of the waste PET bottle (Q) is one or two, the total surface area of all cut portions is extremely small. Therefore, even if a residue such as oil is rubbed into the cut portion, the rubbing amount is extremely small so as to be negligible. Then, the cutting blade (66, 67) is used so that the surface of the cut portion becomes smooth.
Since the above-mentioned division is performed by using, extremely minute residues and the like rubbed into the cut portion at the time of cleaning the inner surface can be reliably removed.

Further, two or three divided bottle portions (Q1, Q2) formed by dividing the waste PET bottle (Q)
2, Q3) is a large lump, so that it is less likely to be rubbed and is less likely to be scratched (thus, there is no inconvenience that residues and the like adhere to the scratches).

As described above, high-quality flakes can be easily produced by removing residues such as soil, sands, oil, soy sauce, and soft drinks to a level at which no practical problem occurs.

Further, the PET bottle dividing means 51 uses the cutting blades (66, 67) to cut the body of the discarded PET bottle (Q) by two.
Since it was formed so as to be able to be cut into three or three pieces, the surface (cut surface) of the cut portion of the bottle (Q) became smooth, and the residue of oil, soy sauce, soft drinks, etc. was less rubbed and rubbed. Residues are easily removed by cleaning the inside. Therefore, higher quality flakes can be produced.

Further, the mouth (Q0) of the waste PET bottle (Q) is cut off from the outer surface cleaning to the fragmentation of the bottle (Q), so that the mouth (Q0) is the bottle body. It is not fragmented together with (Q1, Q2, Q3) and there is no need to separate them after the fragment. Therefore, flakes can be more easily manufactured.

Also, since lye is used as a washing solution,
Residues such as oil, soy sauce, and soft drink adhering to the inner surface of each divided bottle portion (Q1, Q2, Q3) can be more effectively removed. Therefore, higher quality flakes can be produced.

Further, each divided bottle part (Q1, Q2, Q
Since the cleaning liquid (W) is ultrasonically vibrated at the time of cleaning the inner surface in 3), residues such as oil, soy sauce, and soft drink adhering to the inner surface of the divided bottle portion (Q1, Q2, Q3) can be more reliably removed. .

In the above embodiment, the inner surface cleaning means 9 is used.
Although the configuration 1 is provided with the ultrasonic cleaning means 121, the ultrasonic cleaning means may be provided in the outer surface cleaning means 11. With such a configuration, residues such as oil can be more reliably removed from the outer surface of the waste PET bottle (Q). In addition, as a waste PET bottle (Q), a veiled used PET
Used bottles that have been selected but not deformed
A T bottle may be selected.

In the above embodiment, the discarded PET bottles (Q) conveyed to the respective dividing portions (53, 54, 55) of the PET bottle dividing means 51 by the conveyor 32 shown in FIG. In this case, the direction was manually changed so that the mouth was at the top. However, each bottle was placed between each guide inclined plate (45, 46, 47) and each transport route on the transport conveyor 32. By providing the direction adjusting means 121, the waste PET bottle (Q) facing backward may be automatically changed to forward.

Next, means for classifying flakes and contaminants will be introduced.

As shown in FIG. 10, a processing tank 10 ', flake input means (20'), and label collecting means 30 '
The processing tank 10 'is divided into upper layers 1 by a partition plate 15'.
1 'and a lower layer portion 12', and a swirl flow forming means 40 'for generating a water flow S swirling vertically in the upper layer portion 11'.
An opening (17 ') through which only the PET powder P and the water W can pass is formed in the partition plate 15', and the labels L floating on the water surface W1 are collected by the label collecting means 30 ', and the bottoms ( The flakes F that have settled in 17 ′)
At 0 ', the PET powder P which has entered the lower layer portion 12' can be separated and collected by the second carrying-out means 60 '.

Specifically, the processing tank 10 'is formed so as to be able to store water W. The processing tank 10 'is divided into an upper layer 11' and a lower layer 12 'with a partition plate 15' as a boundary. An opening is formed in a part of the partition plate 15 ', through which the water W and the PET powder P pass but the flakes F do not. Of course, the labels L cannot pass through the opening.

In this embodiment, the opening is provided in the partition plate 1.
Numerous through-holes 1 drilled in the lowermost part 16 'of 5'
7 '. As shown in FIG. 12, each of the through holes 17 'is smaller than the inner diameter d1 of the upper layer portion 11'.
The inner diameter d2 on the 2 'side is formed to be large.
Thereby, even if a large number of PET powders P enter simultaneously from the upper layer portion 11 ', it is possible to prevent clogging in the through holes 17'.

Further, when the PET powder P falls, the partition plate 15 ′ has a slope on both sides (18 ′) of a slope in which the PET powder P slides down toward the lowermost portion 16 ′ without stopping.
A, 18'B). Thereby, the penetration of the PET powder P into the lower layer portion 12 'can be further promoted, and the collection efficiency can be further increased.

Further, in this embodiment, PE
In order to increase the recovery efficiency of the T powder P, a water discharging means 70 'for discharging the water W in the lower layer portion 12' to the outside, and a water supply for supplying an amount of water Q corresponding to the drainage amount to the upper layer portion 11 '. Means 80 'are provided.

More specifically, the water discharge means 70 'has one end 71'a communicating with the lower layer 12' of the treatment tank 10 'and discharges water W from the other end 71'b into the tank 75'. It includes a possible discharge pipe 71 'and a discharge pump 72' interposed in the discharge pipe 71 ', and is formed so that the water W in the lower layer portion 12' can be discharged outside the tank. More specifically, the discharge pipe 7
One end 71'a of 1 'communicates with the upper part of lower layer 12' so as not to inhale PET powder P.

On the other hand, the water supply means 80 'is provided with a supply pipe 81'.
And a supply pump 82 'and a nozzle 83'
The water W in 5 ′ is supplied to the upper portion 11 ′ to
The water Q in 1 'is formed so as to always overflow to the recovery section 31'. The nozzle 83 'of the water supply means 80' is arranged so that the water W can flow toward the collection portion 31 'at the receiving portion Wx of the water surface W1 in the upper portion 11'.

Further, in this embodiment, there is provided a preliminary separation means 90 'for irregularly moving the flakes F before being put into the receiving portion Wx of the water surface W1 in the processing tank 10'.

The preliminary separating means 90 'is provided at the receiving portion Wx of the water surface W1 in the upper layer portion 11' and is formed of a dispersing concave portion 97 'having an inverted vertical cross section. When water W is supplied from the nozzle 83 'to the dispersion concave portion 97',
The water W becomes a flow that swirls up and down, and the flakes F
Make irregular movement. Thereby, separation of the labels L and the PET powder P from the flakes F is promoted.

As the preliminary separation means 90 ', FIG.
A pair of impellers (91 '93') and / or dispersing impellers 95 'indicated by two-dot chain lines in 0 may be added. As shown in FIG. 13, the impellers (91 '93') cooperate with each other's blades (92 ', 94') to form flake input means (2).
The flakes F falling from 0 ′) are received so that they can be moved irregularly and dropped downward. Similarly, the dispersing impeller 95 'also has a rotating blade 96'.
Is provided in the dispersion concave portion 97 'so that the flakes F can cause irregular movement.

Next, the flake charging means is provided in the processing tank 10 '.
The flakes F are formed so that the flakes F can be charged into the charged portion Wx of the water surface W1 in the inside. Specifically, the flake input means
The flakes F crushed by a crusher (not shown) are treated in a processing tank 1
It is formed from a flake guide tubular body 20 'that guides to the input portion Wx of 0'.

The label collecting means 30 'includes a processing tank 10'.
It has a collecting portion 31 'which is disposed at a position away from the input portion Wx of the inside water surface W1 and is capable of collecting the labels L moving on the water surface W1 and flowing therethrough. The labels L stored in the collection unit 31 'are transported to a predetermined location while being drained by a belt conveyor (not shown).

The swirling flow forming means 40 'is connected to the collecting section 31' so as to urge the labels L floating on the water surface W1 in the upper layer section 11 'of the processing tank 10' toward the collecting section 31 '. This is a means for forming a water flow S that swirls up and down in the underwater part between the charging part Wx.

Specifically, the swirling flow forming means 40 'is provided in the upper layer portion 11' of the processing tank 10 'and is capable of blowing water or air toward the receiving portion Wx of the water surface W1. And an upper guide (97'a) for guiding the water or air blown from the nozzle 42 'toward the collecting section 31', and an upper layer for supplying water or air flowing toward the collecting section 31 '. An intermediate guide (46 ', 13') for guiding toward the bottom portion (16 ') and a lower guide (18'A) for guiding water or air toward the bottom portion (16') toward the nozzle 42 '. , 18'B).

In this embodiment, the swirling flow forming means 40 '
Are formed so that fine bubbles can be ejected from the nozzle 42 '. That is, the blowing means 41 'is formed by the lower nozzle 42' and an air compressor 44 'for supplying compressed air to the nozzle 42' via the supply pipe 43 '. As described above, fine bubbles are ejected from the nozzle 42 ', so that bubbles are attached to the lower surface of the labels L floating on the water surface W1. Therefore, the labels L can be more easily moved on the water surface W1, and the collection by the collection unit 31 'can be performed more quickly.

In this embodiment, the lower guide is formed of a partition plate 15 'in order to share components. The upper guide is formed from the projecting lower surface 97a of the dispersion concave portion 97 '. The intermediate guide is formed by an intermediate guide plate 46 'and the inner surface of the side wall 13' where the recovery part 31 'of the processing tank 10 is provided.

The intermediate guide plate 46 'is formed so as to extend in a direction orthogonal to the plane of the paper in FIG.
It is inclined so that the distance from the side wall 13 'becomes smaller as it goes inward. In the intermediate guide plate 46 ', the distance Y2 between the lower end face and the inner discharge screw 51' of the first discharge means 50 'is larger than the distance Y1 between the upper end face and the upper guide (97'a). It is arranged as follows. The interval Y1 is selected to be narrow so that the bubbles ejected from the nozzle 42 'flow according to the upper guide (97'a).

The first unloading means 50 'is formed so that the flakes F settled at the bottom (16') of the upper layer 11 'of the processing tank 10' can be unloaded to a first location (not shown) outside the tank. . Specifically, the first unloading means 50 'is provided with a processing tank 10'.
A pair of inner discharge screws 51 'extending in a direction perpendicular to the plane of FIG. 10 at the bottom (16') of the upper layer portion 11 '.
As shown by a two-dot chain line in FIG. 11, an outer discharge screw 52 'which is disposed outside the processing tank 10' and which can discharge the flakes F sent by the inner discharge screw 51 'to the first position. ing.

Since the pair of inner discharge screws 51 'rotate in the directions facing each other (the direction of the arrow in FIG. 10), the flakes F are rubbed and cleaned to further purify the flakes F and the PET powder P. Separation can be further promoted.

The second carrying-out means 60 'is formed so as to carry out the PET powder P in the lower layer 12' of the processing tank 10 'to a second location (not shown) outside the tank. Specifically, the second unloading means 60 ′ includes an inner unloading screw 61 ′ disposed at the bottom of the lower layer portion 12 ′ of the processing tank 10 ′, and a screw 6.
The PET powder P, which is disposed outside the processing tank 10 'and sent by the inner unloading screw 61' as shown by a two-dot chain line in FIG. And an outside discharge screw 62 'which can be discharged.

Next, the operation of this embodiment will be described.

When the flakes F to which the labels L and the PET powder P adhere are put into the receiving portion Wx of the water surface W1 in the treatment tank 10 'via the flake guide cylindrical body 20', the flakes F It is made to move irregularly by the preliminary sorting means 90 '. Thereby, the labels L and the PET powder P attached to the flake F are separated to a considerable extent.

Thus, the flakes F that have passed through the preparatory separation means 90 'are put into the receiving portion Wx of the water surface W1 in the processing tank 10'. Then, the flake F becomes a swirling flow S
Is drawn into the water by Then, by being rubbed by the swirling flow S, the labels L and the PET powder P which have been attached to the flake F without being removed by the preliminary separating means 90 'are separated.

Here, since the labels L separated from the flakes F have a specific gravity of 0.94, the labels L descend according to the swirling flow S to near the bottom of the upper layer portion 11 ', turn upward, and float on the water surface W1. Then, the labels L are urged by the swirling flow S on the water surface W1 to move toward the collection unit 31 ', and are collected by the collection unit 31'. The labels L thus collected can be reused as a resin material by performing a predetermined process.

The flake F and the PET powder P separated from the flake F have a specific gravity of 1.34.
After descending to the vicinity of the bottom (16 ') of the upper layer portion 11' according to the swirling flow S, the water flow S does not follow even if it turns upward and sinks at the bottom. Then, the flakes F are transferred to the first unloading means 5.
By 0 ', it is carried out to the first place outside the tank. Since the flakes F collected at the first location do not have the labels L and the PET powder P attached thereto, the flakes F can be reused as a high-quality molding raw material or the like.

Further, the PET powder P passes through the through hole 17 'of the partition plate 15', enters the lower layer portion 12 ', and is carried out to the second place outside the tank by the second carrying out means 60'. The PET powder P collected at the second location can be reused as an extremely high-quality raw material for pellets by performing a predetermined process.

Therefore, flake F and labels L and P
The ET powder P can be reliably separated, and the waste PET bottle can be reused without waste.

Thus, a waste PET bottle treatment classifier capable of separating labels L and PET powder P from flakes F obtained by crushing waste PET bottles, and a treatment tank 10 ′ containing water W Flake input means (20 ') capable of inputting flakes F to the input portion Wx of the water surface W1 in the processing tank 10'; and the input portion Wx of the water surface W1.
And a label collecting means 30 ′ having a collecting section 31 ′ which is disposed at a position distant from the water surface W1 and which can collect the labels L which have moved on the water surface W 1 and flowed in the processing tank 10 ′. ′, And divided into an upper layer portion 11 ′ and a lower layer portion 12 ′, and a part of the partition plate 15 ′ (the lowermost portion 16 ′).
An opening (17 ') through which water W and PET powder P pass but flake F does not pass through, and a water surface W1 in the upper layer portion 11' is formed.
A swirl flow forming means capable of forming a water flow S which swirls up and down in water between the collecting portion 31 'and the receiving portion Wx so that the labels L floating above can be urged toward the collecting portion 31'. 40 ', a first discharging means 50' capable of discharging the flakes F settled at the bottom (16 ') of the upper layer portion 11' to a first location outside the tank, and a PE in the lower layer portion 12 '.
Second unloading means 6 capable of unloading T powder P to a second location outside the tank
Since 0 'is provided, the flake F, the labels L, and the PET powder P can be surely separated so that the waste PET bottle can be reused without waste.

Further, the swirling flow forming means 40 ′ is
1 ', a blowing means 41' having a nozzle 42 'capable of blowing water or air toward the input portion Wx of the water surface W1 and a water or air blown from the nozzle 42' An upper guide (97'a) for guiding in the direction of 31 ', and an intermediate guide (46', 13 ') for guiding water or air flowing in the direction of the collecting section 31' toward the bottom (16 ') of the upper layer. Since the lower guide (18'A, 18'B) guides the water W or air toward the upper layer bottom (16 ') toward the nozzle 42', the nozzle 4
The water W or air blown out from 2 'is guided by the upper guide (97'a), the intermediate guides (46', 13 '), and the lower guides (18'A, 18'B), and turns vertically. A stream S is formed. Therefore, the structure of the device can be further simplified.

The lower guide is formed of a partition plate 15 ', and the partition plate 15' is formed with an opening (17 ').
Is the lowermost part 16 'and the PET powder P is the opening (17').
Slopes (18'A, 1)
8'B), the parts can be shared, and the structure can be further simplified and the cost can be reduced. Further, since the PET powder P enters the lower layer portion 12 'through the opening portion (17') without being deposited on the partition plate 15 ', it can be more reliably separated and collected.

Further, there are provided a water discharging means 70 'for discharging the water W in the lower layer part 12' to the outside, and a water supplying means 80 'for supplying an amount of water corresponding to the drainage to the upper layer part 11'. Therefore, the water W in the upper layer portion 11 'is drawn into the lower layer portion 12' through each through hole 17 'of the partition plate 15', and the PET powder P in the upper layer portion 11 'is more smoothly and reliably.
Into the lower part 12 'to separate and collect.

Further, the water supply means 80 'transfers the water W to the receiving portion 31' of the charged portion Wx of the water surface W1 in the upper layer portion 11 '.
It is configured to supply so that it flows toward
The labels L floating on the water surface W1 can be more quickly and reliably collected.

Furthermore, since preliminary separation means 90 'for irregularly moving the flakes F before being introduced into the receiving portion Wx of the water surface W1 is provided, the flakes F, the labels L and the PET powder P are further separated. Separation and collection can be performed more reliably.

Thus, a processing tank, a flake input means, and a label collecting means are provided, and the processing tank is divided into an upper layer part and a lower layer part by a partition plate, and a vertically circulating water flow is generated in the upper layer part. A swirl flow forming means for causing
An opening that allows only ET powder and water to pass through is formed, so that labels floating on the water surface are label collecting means, flakes settled at the bottom of the upper layer are first discharging means, and PET powder entering the lower layer is By the second carrying-out means, they can be separately collected. Thereby, the waste PET bottle can be reused without waste.

However, according to the above-mentioned washing and classification means, almost completely washed flakes can be obtained from the waste PET bottle. Therefore, as in the prior art, the removal of dirt is performed after depolymerization of the PET resin. There is no need to carry over, and it can be handled as a quasi-virgin material as well as sprue and runners without contamination, extremely low molecular weight, scorch etc. The present invention can be applied and the present invention can be established.

[0134]

As described above, since the present invention is constituted, it is possible to recycle waste PET bottles at extremely low cost.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a method of cleaning a waste PET bottle according to the present invention.

FIG. 2 is a view for explaining the overall configuration of the present cleaning apparatus in the present invention.

FIG. 3 is a view for explaining an outer surface cleaning means in the present invention.

FIG. 4 is a diagram for explaining a sorting and conveying unit in the present invention.

FIG. 5 shows a sieve, a guide inclined plate,
It is a top view for explaining the positional relationship of each guide rail.

FIG. 6 is a diagram for explaining a PET bottle dividing means in the present invention.

FIG. 7 is a diagram for explaining a slider driving unit of the PET bottle dividing unit according to the present invention.

FIG. 8 is a diagram for explaining a positional relationship among an inner surface cleaning means, a screw conveying device, and a crusher in the present invention.

FIG. 9 is a diagram illustrating a state in which a waste PET bottle is divided into three parts according to the present invention.

FIG. 10 is a diagram for explaining the entire configuration of a waste PET bottle processing classification device according to the present invention.

FIG. 11 is a diagram for explaining a first unloading unit and a second unloading unit in the classification device.

FIG. 12 is a view for explaining a through hole formed in the lowermost part of the partition plate.

FIG. 13 is a view for explaining a pair of impellers constituting the preliminary separation means.

FIG. 14 is a view for explaining a dispersion impeller constituting a preliminary separation means.

[Explanation of symbols]

 2; Conveyor 3; Storage box 4; Frame 5; Mounting member 6; Mounting section 7; Bearing 8; Protruding shaft 9; Storage box 10; Cleaning device 10 ′; Processing tank 11; Outer surface cleaning means 11 ′; Cleaning tank 12A; Inlet 12B; Outlet 12 '; Lower layer 12a; Upper chord 13 of pipe; Rotary drum 13' with blade; Intermediate guide 13 '; Side wall 14; Blade 15; Guide member 15'; Lower part 17; Cleaning liquid supply pipe 17 '; Bottom part 17'; Through hole 17 '; Opening 18; Nozzle 18'A, B; Slope 18'A, B; Lower part Guide 19; screw device 20 '; flake input means 20'; flake guide tubular body 21; selective conveying section 22, 23, 24; Sieve vibrating means 26; motor 27; disc 28A; first engaging part 28B; second engaging part 29; connecting rod 30 '; label collecting means 31'; collecting part 32; transport conveyors 33A, 33B; Car 34; Belts 35, 36, 37; Guide rail 40 '; Swirling flow forming means 41'; Blowing means 42 '; Nozzle 43'; Supply pipe 44 '; Air compressors 45, 46; Guide inclined plate 46'; Guide 46 '; Intermediate guide plate 47; Guide inclined plate 50'; First discharge means 51; PET bottle dividing means 51 '; Inside discharge screw 52; Inclined support 52'; Outside discharge screw 53; First division 54; Second divided portion 55; third divided portion 56; upright wall 60 '; second discharge means 61'; inner discharge screw 62; Hole 62 '; Outer discharge screw 63, 64; Cutting blade passage hole 64'; Reticulated tubular body 65; Slider 66, 67, 68; Cutting blade 69; Bottle holder 70 ', 71'; Water discharging means 71'a One end 71'b; the other end 72; slider driving means 73; crankshaft 74; connecting rod 75; flywheel 75 '; tank 80'; water supply means 81; inlet side locking means 81 '; supply pipe 82; Locking member 82 '; Supply pump 83; Driving cylinder 83'; Nozzle 85; Positioning means 86; Position regulating member 87; Driving cylinder 90 '; Preliminary sorting means 91; Inner surface cleaning means 91'; Impeller 92; 92A; inlet part 92B; outlet part 92 '; impeller 93; stirring screw 93'; impeller 94; stirring screw means 9 Cleaning liquid spraying means 95 '; Dispersion impeller 96'; Blade 97; Cleaning liquid supply pipe 97a; Protrusion lower surface 97N; Nozzle 97 '; Dispersion concave portion 97'a; Upper guide 98; Mesh basket 98; Screw device 101; screw conveying device 102; cylinder portion 103; screw 104; screw driving device 105; outlet portion 106; rinsing portion 107; partition plate 108; rinsing water collecting tank 111; crushing device 121; Inner diameter F; Flake L; Labels P; PET powder Q; Waste PET bottle Q0; Mouth Q1, Q2, Q3; Bottle body S; Water flow W; Washing liquid (water) W1; Water surface Wx; Part Y1, Y2; interval

Claims (3)

[Claims] 1. A method in which monomer PEN flakes or almost completely washed waste PEN flakes are mixed at a predetermined ratio with substantially completely washed waste PET bottle flakes, and the mixed flakes are dried to 50 to 80 ppm by vacuum drying under reduced pressure. Is heated in a twin-screw kneading extruder heated to 250 to 280 ° C. in a filled dry inert gas with the addition of a condensing agent. Since neither PET nor PEN is completely dried, hydrolysis occurs, but PE produced by hydrolysis
The two benzene nuclei of the dicarboxylic acid of N assist the ester bond by the action of the condensation catalyst to cause a strong attractive bond, bond between PET before melting to prevent a decrease in the overall molecular weight and to recover the IV value. A method for recycling PET bottles. 2. As a means for producing almost completely washed waste bottle flakes, the outer surface of the waste bottle is washed with a cleaning liquid, the mouth of the bottle is cut off, and then the body of the waste PET bottle is cut with a cutting blade. Divided or divided into three parts, and then the inner surface of each divided bottle part is washed by an inner surface cleaning means in which the cleaning liquid is ultrasonically vibrated, and then the washed divided bottle parts are crushed into small pieces to produce flakes, The divided flakes are provided with a processing tank, a flake input unit, and a label collection unit, and the processing tank is divided into an upper layer portion and a lower layer portion by a partition plate, and a swirl is generated in the upper layer portion so as to generate a water flow swirling vertically. A flow forming means is provided, and the labels floating on the water surface by forming an opening in the partition plate through which only the PET powder and water can pass are label collecting means.
2. The PET bottle recycling method according to claim 1, wherein the PET powder that has entered the lower layer portion by the carrying-out means is treated by washing, pulverizing, and classifying means that the PET powder can be separately collected by the second carrying-out means. 3. As a means for producing almost completely washed waste bottle flakes, the outer surface of the waste bottle is washed with a cleaning solution, the mouth of the bottle is cut off, and the body of the waste PET bottle is cut with a cutting blade. Divided or divided into three parts, and then the inner surface of each divided bottle part is washed by an inner surface cleaning means in which the cleaning liquid is ultrasonically vibrated, and then the washed divided bottle parts are crushed into small pieces to produce flakes, The divided flakes are provided with a processing tank, a flake input unit, and a label collection unit, and the processing tank is divided into an upper layer portion and a lower layer portion by a partition plate, and a swirl is generated in the upper layer portion so as to generate a water flow swirling vertically. A flow forming means is provided, and the labels floating on the water surface by forming an opening in the partition plate through which only the PET powder and water can pass are label collecting means.
A waste bottle washing, crushing, and classifying apparatus in which the PET powder that has entered the lower layer portion by the carrying-out means can be separately collected by the second carrying-out means.