TWI240728B - Method of recycling crosslinked foamed plastic waste with adequately controlled cracking condition - Google Patents

Abstract

A kind of method of recycling crosslinked foamed plastic waste with adequately controlled cracking condition comprises steps of (a): feeding materials into a pulverizer to be pulverized so that reaction rate can be increased; (b): sending the above-mentioned materials into a specific gravity tank for selecting to classify materials with similar specific gravity so that suitable catalyst can be chosen; (c): sending the materials into a recycling machine so that the processed materials can be cut, compressed and melted; (d): adding the catalyst to provide compatible interfaces for the materials; (e): sieving and palletizing; (f): injection and extrusion molding to produce finished product so that crosslinked foamed plastics can be recycled.

Description

1240728 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for recovering cross-linked foamed plastic waste, especially a catalyst for adding cross-linked foamed plastic waste, and controlling the reaction rate by external force. Method for recycling cross-linked foamed plastic waste. [Previous technology] The biggest problem of plastic waste recycling is that it must spend a lot of manpower and machinery and equipment to clean and sort the waste. Moreover, these equipments are expensive and not efficient. The cross-linked foamed plastic waste is used as a solid fuel because of difficult recovery, or it is cracked to become a low molecular weight heavy oil. Although the above-mentioned recycling method solves the problem of recycling plastic waste, the results obtained by the above method only provide the final outlet of plastic waste, and it is a low-value and low-utilization method, which does not reach the reuse of waste materials. The effect of higher value and high utilization. Thermoplastic plastics can be melted when heated, but generally, if a 10,000 horsepower machine or a double barrel machine is used, two plastics with very different melting points (tm) can not be melted at the same time, because the actual heat of plastic melting comes from the materials and the machine. Shearing, such as EVA and PP each half of the mixed glue, even if the temperature rises to 2 ◦ ◦ ° C, most of the heat will be absorbed by EVA and melt, making PP slip (because EVA has melted at 200 ° C, Overheating will only dilute the EVA concentration and make the shear low, which is not enough to melt the PP at 200 ° C). However, if the above-mentioned mixed rubber is put into a twin screw, the twin screw is basically hungry. , The raw materials are less likely to slip due to individual melting, but the incompatible mixed glue will cause the twin-screw heating and melting process to be extremely unstable and uncontrollable

1240728 V. Description of the invention (2) The surging and melting fracture (fracture), so traditionally used compatibilizers provide a mixed glue interface, but this technology requires the type of mixed glue to be known in advance in order to choose the appropriate With a proper amount of compatible catalyst, basically, the larger the heated area of the material, the faster the melting rate. The broken plasticization of the material and cracking and scorching are competitive reactions. Observing the torque of the machine is the key to discharging. Zhongming Mingguo Patent Bulletin No. 19 0 4 2 7 The method and device for extracting and recovering the foaming agent from the polymer foam, although the foaming agent can be recovered, requires extremely complicated equipment, and the efficiency achieved is extremely low. Zhongming Mingguo Patent Bulletin No. 4 1 1 3 1 0 Recovery and regeneration method of foamed plastic, which uses a solvent to dissolve the foamed plastic, and then recycles the solvent for recycling. However, the chemical solvent used in this method during the recovery process It will also cause pollution to the ecological environment. Zhongming Mingguo Patent Bulletin No. 2 94 0 0 0 The foamed sole structure of mixed waste material, which recycles the rubber waste material and mixes it into the foamed plastic. In fact, it only mixes the waste material into the foamed shoes to reinforce the foamed shoes. Provides essentially recycled methods for foamed plastic. In summary, the recycling and reuse of foamed plastics have the disadvantages of low value utilization, pollution, and high costs. It is really necessary to develop a recovery method with high utilization value, low pollution, and low cost. [Summary of the invention] The main purpose of the present invention is to solve the above problems and provide a method for recovering cross-linked foamed plastic waste by appropriately controlling the cracking conditions, including: a: the step of putting the material to be processed into a pulverizer, so as to increase Response

1240728 V. Description of the invention (3) Rate. b: The step of sending the material obtained in step a into the specific gravity tank, and using the specific gravity method to distinguish the materials to be processed, and using the different specific gravity to select an appropriate catalyst, and as a reference for setting the melting temperature of the machine. c: The material obtained in step b is sent to the recycling machine step to melt and plasticize the material, and the recycling machine must have compression, shearing and melting at the same time, and is equipped with a filter screen, which can be an extruder, One of the drum machine, kneader and ten thousand horsepower machine. d: the step of inputting the catalyst, to control the cracking conditions during recovery processing; e: the step of passing through the net to granulate, to make the material into plastic pellets. f: Shoot and extrude to make finished products. 俾 Plastic pellets are shot and extruded to make finished products. The method of the present invention is to pulverize the recycled material to increase the reaction rate, and to distinguish the specific gravity tank, to select an appropriate catalyst, and in the melting process, a cylinder with both shearing and compression is selected, and The use of external catalysts generates cracking conditions to destroy the three-dimensional spatial network structure of the foamed plastic bridge. External forces are used to promote the contact of the melting interface, which can avoid the scorching phenomenon generated during cracking, so it can be used without adding equipment. Under the investment, the existing machine using traditional plastic processing, as long as the above-mentioned processing conditions are controlled, can recover the cross-linked foamed plastic waste, which is in line with the high-utilization value, low pollution, and low cost recycling method. The specific gravity tank referred to in the present invention is located above a long flowing water tank and is provided with a baffle, so that the specific gravity of the crushed recycled material can be distinguished.

1240728 V. Description of the invention (4) The specific gravity is greater than 1 PET, and the ratio of the foaming product is more than the melting temperature of the machine. In the present invention, the medium (such as excessive metal time, etc., plus a road or material), and for shrinking, The continuous smelting and melting of the cut and mixed plastics makes the details of the embodiment of the invention of the machine, of course, different from the one, but it is explained, and attached [Embodiment] Please refer to the data limitation of the embodiment. Please refer to the cross-linked foamed plastic a. · The weight of the person to be treated is generally less than the flammable reference or peroxy parts to make the color of the body foamed. The above and description and invention provided by this interface are in The selected picture shows PV 1 and the burning characteristics are examined. The production of cracked strips and other materials has been changed. The waste material is applied to the invention, so that the mixed shear force is shown in some other examples in the drawings. Its components, systems, or due to degradation, but play a role between the glue with different fingers. If you get the best, you can add plasticizers at high temperature, which can be used as high-temperature plasticizers, allow external force modifiers, and add softness to processing. They do not go deeper or separate the instructions 66 and S in this description. The contact speed and the burning pressure can reduce the degree of supply of dark materials. Figures 1 to 6 are shown in the figure for the purpose of the present invention. This is for illustrative purposes only and is not subject to this figure in patent applications. A method for recovering waste materials by appropriately controlling cracking conditions of the present invention includes the following steps: The step of putting materials into a pulverizer to increase the reaction C, ABS, PA6 & generally PE, PP and P are simply distinguished from each other In the process of employment, high pressure, and even siege (such as making the material refers to a temperature ladder additive. It is difficult to understand from the following choices. The arrangement allows detailed information in the book.

1240728 V. Description of the invention (5) Rate, in which the material to be processed is a plastic recycling material with electronic bridging, physical and chemical and one of the cross-linked foaming materials. b: The step of sending the material obtained in step a into the specific gravity tank, and using the specific gravity method to distinguish the materials to be treated, and using different specific gravity to select an appropriate catalyst. c: The material obtained in step b is sent to the recycling machine step to melt and plasticize the material, and the recycling machine must have compression, shearing and melting at the same time, and is equipped with a filter screen, which can be an extruder, One of the drum machine, kneader and ten thousand horsepower machine. d: The step of putting in the catalyst to control the cracking conditions during recovery and processing. e: The step of granulating through a net, to make the material into plastic granules. f: Shoot and extrude to make finished products. 俾 Plastic pellets are shot and extruded to make finished products. The inventors have used the following experimental steps and the results obtained through continuous research, and cleverly applied them to the recovery of cross-linked foamed plastics based on their steps and results: 1 · Recycled EVA cross-linked foamed waste After being rapidly cooled by liquid nitrogen, it is pulverized by a ball mill and sieved to collect an irregular crushed material of 200 mm, each of which is additionally added with a catalyst of 0. 0 1 g to 0. 1 g. In this embodiment, The catalyst system contains peroxides, starting catalysts and commonly used anhydrides or coupling agents that are useful for grafting functional groups, mainly to increase the conditions of cracking and the environment, and to provide opportunities for material interface compatibility, and the liquid catalyst The production process is as follows:

1240728 V. Description of the invention (6) The proportion of peroxide and mixed acid solution is diluted with acetone. The function of acetone is to stabilize and dilute the area in contact with the enlarged catalyst and materials. The catalyst in this example is DCP, and the above mixed acid The solution was 1: 4 MAH: AA, and after reading the different additives via a thermogravimetric loss analyzer (TGA), the temperature difference between 10% and 50% of the cracking was recovered as a reference for recovering the cracking temperature, and observed that there was no external force (Compression, shearing) under the melting curve of heat, and its parameters and test results are shown in Figure 4, where the best amount of melting curve can be obtained with a catalyst addition amount of 0.30 g. 2 · The optimal addition amount obtained in the previous step (adding 0.03 g of catalyst to every 200 millimeters of irregular crushed material), and produce crushed particles of different particle diameters, and pass the thermogravimetric loss analyzer (TGA ) Test to obtain the difference in melting rate of pulverized granules with different outer diameters catalyzed by liquid catalyst when no external pressure is applied (as shown in Figure 5). As a reference for recycling cracking temperature, from the results, Except for the obvious difference in the minimum particle size, there is no significant change in the amount of liquid catalyst added, that is, the particle size is closely related to the amount of catalyst that promotes cracking under no external pressure. The crushed material can get the best melting curve. 3. According to the method of step 1, grind the recycled material of EVA chemical cross-linked foamed beach shoes, and pass the melt index tester to change the load under different loads (2-16Kg, 5.1Kg and 9.9Kg), and set the temperature to 250 ° C and 300 ° C for 30 minutes, and observe the change of the heat-melt index under the action of external force (compressed but not sheared)

1240728 V. Description of the invention (7) The results show that although the crosslinked foamed body has extremely high heat resistance as expected, the appearance of the recycled material under high pressure and heat has been melted (such as the second (Shown in the figure) ◦ 4 · Cut the recycled EVA chemically cross-linked foamed beach shoes into a piece of about 1 cubic centimeter each (as shown in Figure 6), take 1 · 5g, and add them separately Liquid catalyst from 0 · Olg to 0 · lg, tested with a crosslinked foaming instrument and observed its internal plastic pressure under external force (compressed but not sheared) (as shown in Figure 3), and recorded the melt As a result of the appearance, in this example, a low internal plastic pressure is obtained with an addition amount of 0.05 g, and the appearance of the melt interface does not change. If the addition amount of the liquid catalyst exceeds 0, 0.05 g, The plastic pressure will decrease, but the appearance of the melt interface will turn yellow or even black. In contrast, if the amount of liquid catalyst is less than 0.5 g, although the appearance of the melt interface will not change, Plastic pressure will increase. 5 · The crushed and recovered PP juice bottles and EVA chemical cross-linked foamed shipwreck shoes are recycled materials at a ratio of 1: 9 and added with appropriate additives into the recycling machine. In this embodiment, a ten-horsepower machine is used. The temperature is set to 250 ° C, the rotation speed is set to 50 r pm, and the pressure is set to 50 kg / cm 2. Test and observe the change of heat and melt under external force (compressed and sheared). . 6 · The crushed and recycled 100% EVA chemically cross-linked foamed beach shoes are recycled materials and appropriate additives. The input temperature is set to 250 ° C, the speed is set to 50rpm, and the pressure is set to 50kg. / cm 2 10,000 horsepower machine, test and observe its external force (compressed and sheared)

Page 10 1240728 V. Description of the invention) Work 7 • Use the tensile strength of the recovered material in the actual test 2 as shown in the figure for 10 mouthwash cups, enter the grinder at 50 ° C, and 2 million horsepower, and In summary, the speed of foamed plastics, the blending agent, and the continuous melting of the foamed plastics machine were brought into contact, and the cross-linked low pollution, (8) was used, Example 5 tablets, as shown. Recycling material, after the first 10% of the impact resistance, it is crushed, set the speed of the force machine and use the injection, the use of waste materials than the machine melt bridge bridge interface to avoid the low cost of foam plastic The strength of 10 is above the above-mentioned strike. 〇, the VA cross-linked recovery of 1 and the ratio is set to 50. Add the appropriate molding mechanism. Due to the method of the present invention, the first heavy tank will return to the three-degree space of the melting temperature, so that the mixed rubber cutting force will play a role in cracking the connected rubber waste. The change of multiple effects of heat and melting (see Figure 8). The pellets prepared with 6 were tested by injection molding machine for tensile strength and impact resistance. The obtained results are as follows: 0% EVA chemically cross-linked foamed beach shoes and cracked, and still have good resistance. According to the steps of the present invention, the OO% EVA cross-linked foamed shoe waste made from the actual weight of the trough is distinguished from the weight trough made by recycling the foamed beach shoe waste. The input temperature is set at 2 rpm and the pressure is set at 50 kg / cm. The ratio of the additive is to make a plastic cup into a mouthwash cup. Mingzhi moderately controls the cracking conditions. Recycling and cross-linking will crush the recycled materials, to increase the separation of the reaction materials, and to choose an appropriate catalytic reference to generate cracking conditions to destroy the network structure and provide a processing softening temperature. The gradient is reduced, and the effect is reduced, and the material is burnt by the catalyst when the external interface is used to promote the melt interface lock reaction, and the material is used, so as to achieve high utilization value and fruit.

1240728 V. Description of the invention (9) The disclosure of the above embodiment is used to explain the creation, not to limit the creation. Therefore, any numerical change or replacement of equivalent components should still belong to the scope of the creation. From the above detailed description, those skilled in the art can understand that this creation can indeed achieve the aforementioned purpose, and it has indeed complied with the provisions of the Patent Law, and filed a patent application. _

Page 12 1240728 Brief Description of Drawings Figure 1 is a flowchart of the method of the present invention. Fig. 2 is one of the physical property diagrams of the present invention. Fig. 3 is the second physical property map of the present invention. Fig. 4 is one of the thermal melting curve of the present invention. Fig. 5 is the second graph of the melting and melting curve of the present invention. Fig. 6 is a reference view of the recovered beach shoes of the present invention pulverized by external force to increase the area. Fig. 7 is a reference drawing of the cracked and melted state of the present invention which is compressed but not sheared. Figure 8 is a reference drawing of the compressed and sheared granulation of the present invention. FIG. 9 is a reference view of the plasticized non-flowing appearance in the melt index meter of the present invention. Fig. 10 is a reference view of a mouthwash cup made by injection molding according to the present invention.

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Claims (1)

1240728 VI. Scope of patent application 1 · A method for recovering cross-linked foamed plastic waste with moderately controlled cracking conditions, the method includes the following steps: a: the step of putting the material to be processed into a pulverizer, and pulverizing the material to be processed Increase the surface area to increase the reaction rate. Among them, the material to be treated is a cross-linked foamed plastic recycled material with electronic bridge, physical bridge and chemical bridge; b: send the material obtained in step a into the specific gravity tank In step 俾, the material to be processed is differentiated by specific gravity method to select an appropriate catalyst c: The material obtained in step b is sent to a recycling machine, and the material is melt-melted and plasticized; d: The catalyst is put in to control the recycling process The cracking conditions at the time; e: granulation through the net; f: shooting, extrusion to make the finished product. 2 · A method for recovering cross-linked foamed plastic waste material according to a moderately controlled cracking condition as described in item 1 of the scope of the patent application, wherein the material to be treated referred to in step a is a recycled material and a mixture of recycled material and new material Materials to promote the flow, adhesion, melting and modification of recycled materials. 3. A method for recovering cross-linked foamed plastic waste material according to a moderately controlled cracking condition described in item 1 of the scope of the patent application, wherein the cracking condition referred to in step d is the addition of a catalyst, transition metal or peroxide, etc. Additives, and plasticization due to external conditions such as high temperature, high pressure, rotation speed and time history, etc., and exert external forces to compress, shear and mix materials. Page 14 1240728 6. Scope of patent application 4 · A method for recovering cross-linked foamed plastic waste material under a moderately controlled cracking condition as described in item 1 of the scope of patent application, wherein the recycling machine referred to in step c must also have The compressing, shearing, mixing, melting and heating unit is provided with a filter screen, and may be one of an extruder, a barrel machine, a kneader and a ten thousand horsepower machine. 5 · A moderately controlled cracking condition as described in item 1 of the scope of patent application A method for recovering cross-linked foamed plastic waste, wherein the catalyst includes transition metals, peroxides, starting catalysts, and commonly used acid anhydrides or coupling agents for grafting functional groups, and one of them and a mixture thereof to increase Cracking conditions to provide an interface for continuous melting of the material. 6. As shown in item 5 of the scope of patent application, wherein the catalyst is a mixed liquid of D C P and a mixed acid solution, wherein the mixed acid solution is M A H: A A of 1: 4. Page 15