TWI879162B - TPU copolymer, method for producing TPU copolymer, and equipment for producing TPU copolymer - Google Patents

Abstract

A TPU copolymer comprises 10-90 wt% of thermoplastic polyurethane (TPU) and 10-60 wt% of a modified substance, wherein the modified substance is one of styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene rubber (SBR), acrylonitrile-butadiene-styrene (ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof. A method for producing a TPU copolymer includes a material preparation step, a primary mixing step, a reaction step, a secondary mixing step and a reaction kneading and conveying step. A device for producing a TPU copolymer includes a mixing device, a reaction device and a reaction kneading and conveying device connected to each other. The reaction kneading and conveying device is connected to a feeding device, and the feeding device includes a funnel and a pair of feeding screws for receiving and outputting the modified material to the reaction kneading and conveying device. Thus, the TPU copolymer has the characteristics of good wet anti-slip property, tear resistance, recovery, tensile strength, softness, toughness and recyclability.

Description

TPU copolymer, method for producing TPU copolymer, and equipment for producing TPU copolymer

The present invention relates to a TPU (Thermoplastic Polyurethane), and in particular to a TPU copolymer, a method for manufacturing the TPU copolymer, and a device for manufacturing the TPU copolymer.

According to the conventional thermoplastic polyurethane pellet manufacturing equipment, please refer to the Republic of China patent application No. 103140388 "Compound plastic pellet manufacturing mechanism", which includes a shot mixing device, the shot mixing device is connected to a feeding device, the feeding device is connected to a kneading reaction device, the kneading reaction device is connected to a reaction escort device, and the reaction escort device is connected to a cooling device. By this, the conventional compound plastic pellet manufacturing mechanism can achieve the effects of material mixing, reaction and mixing, and further improve the quality and output of plastic pellets, so as to achieve the effect of energy saving and carbon reduction.

However, conventional thermoplastic polyurethane has the advantages of tear resistance, better resilience and tensile properties, and can be adjusted in softness and hardness by changing the formula or ratio. However, it has poor wet anti-slip properties and has the disadvantage of being slippery. Therefore, after observing the above-mentioned disadvantages, the inventor of this case believes that the existing thermoplastic polyurethane, the manufacturing method of thermoplastic polyurethane and the manufacturing equipment of thermoplastic polyurethane need to be improved, and thus the present invention was born.

The purpose of the present invention is to provide a TPU copolymer, a method for producing the TPU copolymer and an apparatus for producing the TPU copolymer, wherein a modified substance is mixed into the TPU.

To achieve the above-mentioned purpose, the TPU copolymer provided by the present invention comprises: 10-90 wt% of thermoplastic polyurethane and 10-60 wt% of a modified substance, wherein the modified substance is one of styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene rubber (SBR), acrylonitrile-butadiene-styrene (ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof.

To achieve the above-mentioned purpose, the manufacturing method of TPU copolymer provided by the present invention comprises the following steps: a material preparation step: preparing an isocyanate polymer containing NCO, a hydroxyl compound containing OH and a chain extender; a primary mixing step: mixing the isocyanate polymer containing NCO, the hydroxyl compound containing OH and the chain extender to form a mixture; a reaction step: reacting the mixture to gradually react and mix the mixture; a secondary mixing step: preparing a modified product, which is styrene-ethylene-butadiene-styrene (Styrene-Ethylene-Butadiene-Styrene, SEBS), styrene-butadiene rubber (Styrene-Butadiene Rubber, SBR), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof, and when the mixture has not yet reacted completely, that is, when the reaction and mixing degree of the mixture is about 50% to 80%, the mixture is further mixed with the modified substance; reaction kneading and escorting step: continuously kneading the mixture and the modified substance, wherein the mixture will continue to react and mix into macromolecules and participate in the connection of the modified substance to form a TPU copolymer.

To achieve the above-mentioned purpose, the manufacturing equipment of TPU copolymer provided by the present invention comprises: a mixing device, which comprises a first motor, a first feed head and a mixing container which are connected to each other in a sealed manner, wherein the first feed head has a feed chamber, and the first feed head is connected to a plurality of first storage barrels, and the first storage barrels are used to store thermoplastic polyurethane raw materials and can be metered and output to the feed chamber, and a mixing chamber connected to the feed chamber is formed in the mixing container, and a pair of mixing screws parallel to each other are arranged in the mixing chamber, and the mixing screws are connected to the first motor to mix the thermoplastic polyurethane raw materials into a mixture; A reaction device, comprising a reaction container, a reaction chamber connected to the mixing device is formed in the reaction container, a second motor is provided at one end of the reaction container, the second motor is connected to a pair of parallel reaction screws, and the reaction screws are arranged in the reaction chamber and can be driven by the second motor to react and output the mixture; A reaction kneading and conveying device, comprising a reaction kneading and conveying container, wherein a reaction kneading and conveying chamber connected to the reaction device is formed in the reaction kneading and conveying container, a third motor is provided at one end of the reaction kneading and conveying container, the third motor is connected to a pair of reaction kneading and conveying screws parallel to each other, and the reaction kneading and conveying screws are arranged in the reaction kneading and conveying chamber and can be driven by the third motor to react knead and convey the mixture and then output it; The reaction kneading and escorting device is provided with a feed port at the outer wall edge near the reaction kneading and escorting entrance, and the feed port is connected to a feed device in a sealed manner. The feed device comprises a feed container, and a feed chamber is formed in the feed container, and the feed chamber is connected to the reaction kneading and escorting chamber. A fourth motor is provided at one end of the feed container, and a funnel is provided at the outer wall edge of one end of the feed container near the fourth motor, and the funnel is connected to the feed chamber. The funnel can receive a modified material, and the modified material is styrene-ethylene-butadiene-styrene (Styrene-Ethylene-Butadiene-Styrene, SEBS), styrene-butadiene rubber (Styrene-Butadiene Rubber, SBR), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene (ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof, the fourth motor is connected to a pair of parallel feeding screws, and the feeding screws are arranged in the feeding chamber and can be driven by the fourth motor to convey the modified material and output it to the reaction kneading and conveying chamber, thereby completing the feeding operation.

The TPU copolymer, the method for producing the TPU copolymer and the equipment for producing the TPU copolymer provided by the present invention are to mix the modified substance into the TPU when the TPU has not yet completely reacted, that is, when the reaction and mixing degree of the TPU is about 50% to 80%, wherein the TPU will continue to react and mix into a macromolecule, and at the same time, because the TPU has been independently polymerized by about 50% to 80%, it will be able to participate in the connection of the modified substance to form a TPU copolymer.

The present invention discloses a TPU copolymer, which comprises: 40-90 wt% of TPU (Thermoplastic Polyurethane) and 10-60 wt% of a modified substance. The thermoplastic polyurethane comprises an isocyanate polymer containing NCO in a molar ratio of 1:4:3, a hydroxy compound containing OH, and a chain extender. The chain extender can be one of 1,4-butanediol (1,4-BDO or BDO or 14BG manufactured by Mitsubishi Chemical), 1,3-butanediol (1,3-BG), 1.5MPD 3-methyl-1,5-pentanediol (1.5MPD), 1,6-hexanediol (1,6HD), hydroquinone bis(2-hydroxyethyl) ether (HQEE) or a combination thereof, and an additive such as a UV resistant agent, a heat resistant agent, an antioxidant, a accelerator, or an environmentally friendly plasticizer can be added. Modified materials or modifiers are styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene rubber (SBR), acrylonitrile-butadiene-styrene (ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam plastics (PS). foam, XPS) or a combination thereof, and glass fiber, boron fiber and other composite materials can be added. The modifier is mixed into TPU when TPU has not yet reacted completely, that is, when the reaction and mixing degree of TPU is about 50%~80%. Among them, TPU will continue to react and mix into macromolecules to improve the physical properties of TPU copolymer. At the same time, since TPU has been independently polymerized by about 50%~80%, the modifier can participate in the polymerization reaction, so that TPU and the modifier are linked to form a copolymer, so that the TPU particles and the modifier particles have better bonding properties, thereby forming a TPU copolymer. In this way, TPU copolymer can avoid the shortcoming of TPU that it will slip when wet, so that TPU copolymer has the characteristics of good wet anti-slip, tear resistance, recovery, tension, softness, toughness, and recyclability. The hardness of TPU copolymer can be adjusted by changing the formula or proportion of TPU.

The modified substance may further include a coupling agent, which may be a coupling agent having an OH group and may promote coupling of TPU and the modified substance with different polarities.

Please refer to FIG. 1 and FIG. 2, which are a combined schematic diagram and a combined cross-sectional diagram of a preferred embodiment of the present invention, which discloses a method for manufacturing a TPU copolymer, which includes the following steps:

Preparation steps: prepare an isocyanate polymer containing NCO, a hydroxy compound containing OH, and a chain extender.

A primary mixing step: mixing the NCO-containing isocyanate polymer, the OH-containing hydroxyl compound and the chain extender at a molar ratio of 1:4:3 to form a mixture.

Reaction step: reacting the mixture to gradually react and chain form a TPU.

Secondary mixing step: preparing a modified substance, the modified substance being one or a combination of Styrene-Ethylene-Butadiene-Styrene (SEBS), Styrene-Butadiene Rubber (SBR), Acrylonitrile Butadiene Styrene (ABS), Polyethylene Eerephthalate (PET), Polystyrene (PS) and extruded polystyrene foam (XPS), and further mixing the mixture with the modified substance when the mixture has not yet completely reacted, i.e., when the reaction and mixing degree of the mixture is about 50% to 80%.

Reaction kneading and escorting step: the mixture and the modified product are continuously kneaded, wherein the mixture will continue to react and chain into macromolecules, improving the physical properties of the TPU copolymer. At the same time, since the mixture has been independently polymerized by about 50% to 80%, it will be able to participate in the connection of the modified product to form a TPU copolymer.

Finishing step: the TPU copolymer is pelletized, crystallized, dehydrated and dried in water and shaped into TPU copolymer pellets.

Please refer to FIG. 2 and FIG. 3, which are combined schematic diagrams and combined cross-sectional diagrams of a preferred embodiment of the present invention, which disclose a TPU copolymer manufacturing device 100, which includes:

A mixing device 10 includes a first motor 11, at least a first feed head 12 and a mixing container 13 connected to each other, and the first motor 11, the first feed head 12 and the mixing container 13 are connected in a sealed manner to prevent volatile organic compounds (VOC) generated during the mixing reaction from being discharged to the outside to avoid air pollution and environmental protection. Please refer to Section 4 for details. As shown in the figure, the first feed head 12 has a feed chamber 121, and the peripheral wall of the first feed head 12 is penetrated with a plurality of feed holes 122, and the feed holes 122 are connected to the feed chamber 121, and the feed holes 122 are respectively connected to at least one first storage barrel 123 in a sealed manner such as locking or screwing. The first storage barrels 123 are used to store a plurality of different thermoplastic polyurethanes. The first storage barrels 123 are respectively equipped with an isocyanate polymer containing NCO, a hydroxy compound containing OH and a short chain extender, and output in a metered manner. In the embodiment of the present invention, the number of the first feed heads 12 is 1 to 2 and they are stacked up and down. Each first feed head 12 can be connected to 1 to 5 first storage barrels 123, and the number of the first storage barrels 123 is The amount is 1 to 10, wherein, in another preferred embodiment of the present invention, the first storage barrels 123 are respectively equipped with an isocyanate polymer containing NCO, a hydroxy compound containing OH and a short chain extender, diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), polyether polyol (Polyether polyol), polyester polyol (polyester polyol), 1, 4-butanediol (1,4-BDO or BDO), 1.5MPD 3-methyl-1,5-pentanediol (1.5MPD), 1, 6-hexanediol (1,6HD), hydroquinone bis (2-hydroxyethyl) ether (HQEE), UV resistant agent, heat resistant agent, antioxidant, promoter or environmentally friendly plasticizer, or a combination thereof, and can be metered and output to the feed chamber 121. The mixing container 13 is formed with a mixing chamber 131 and a mixing outlet 132 connected to the mixing chamber 131. One end of the mixing chamber 131 is connected to the feed chamber 121 for The mixing chamber 131 receives the plastic pellet raw material, and a pair of mixing screws 14 are arranged in parallel with each other. The mixing screws 14 extend to the feeding chamber 121 and are connected to the first motor 11 to mix the plastic pellet raw material into a plastic pellet raw material mixture. The mixing outlet 132 is located at the other end of the mixing chamber 131 and can output the plastic pellet raw material mixture. The mixing device 10 is provided with a first mixing outlet 132 near the mixing outlet 132. A discharge valve 15 is provided. The first discharge valve 15 is in the shape of a column, a plate or a strip and is radially penetrated through the outer wall of the mixing container 13. The first discharge valve 15 has a material delivery hole 151 and a material discharge flow channel 152. The first discharge valve 15 is connected to a hydraulic cylinder 153 on the outer wall of the mixing container 13 to drive the first discharge valve 15. When the first discharge valve 15 is in the first position as shown in FIG. 5, the material delivery hole 151 is opened. The two ends are respectively connected to the mixing chamber 131 and the mixing outlet 132, so that the mixing outlet 132 can output the plastic pellet raw material mixture. When the first discharge valve 15 is in the second position as shown in Figure 6, the mixing chamber 131 is connected to the discharge flow channel 152, so that the discharge flow channel 152 can output the plastic pellet raw material mixture and receive the plastic pellet raw material mixture through a container (not shown) to confirm the quality of the plastic pellet raw material mixture.

A reaction device 20 is connected to the mixing device 10 in a sealed manner and includes a reaction container 21. A reaction chamber 211 is formed in the reaction container 21. The reaction chamber 211 is connected to the mixing device 10 and is used to receive the plastic pellet raw material mixture output from the mixing device 10. One end of the reaction container 21 is provided with a second motor 22. The second motor 22 is provided with a first gear box 23. A reaction inlet 212 is formed on the outer wall edge of one end near the second motor 22, so that the reaction chamber 211 and the mixing device 10 are connected to each other. A feed inlet 213 is formed on the outer wall edge at the middle position of the reaction container 21. Please refer to FIG. 7 for details. The feed inlet 213 is screwed with a second feed head 26. The second feed head 26 has a through hole 261 and a screw hole 26 disposed coaxially with the through hole 261. 2 and an inlet flow channel 263 connected to the through hole 261, one end of the through hole 261 is connected to the reaction chamber 211, a sealing member 264 is provided in the through hole 261, and the sealing member 264 includes a pull rod 265, and the two ends of the pull rod 265 are provided with a plug 266 and an elastic part 267, the plug 266 is located between the through hole 261 and the reaction chamber 211, and the screw hole 262 is located far away from the inlet port 213 A cylindrical knob 27 is screwed on the stopper 27, and the knob 27 has a stopper 271. At least one elastic member 272 is provided between the stopper 271 and the elastic member 267. The elastic member 272 is a spring. The elastic force of the elastic member 272 can push against the elastic member 267, so that the plug 266 has a preload to close the through hole 261. The elastic force of the elastic member 272 can be adjusted by the knob 27 to prevent the plastic pellet raw materials from mixing. The inlet channel 263 is connected to the through hole 261 at one end thereof, and a joint 268 is provided at the open end thereof. The joint 268 is connected to a ball valve, a filter, a pump 28 and a second storage barrel 29. The second storage barrel 29 is provided with an isocyanate polymer containing NCO, a hydroxy compound containing OH, a chain extender or a catalyst, and can be metered and outputted. The pump 28 is pressurized to push against the plug 266. , and then input into the reaction chamber 211 as shown in FIG. 8, the other end of the reaction chamber 211 is further provided with a reaction outlet 215, the second motor 22 is connected to a pair of reaction screws 24 parallel to each other, and the reaction screws 24 are arranged in the reaction chamber 211, and can be driven by the second motor 22 to react and output the plastic pellet raw material mixture, wherein the reaction device 20 is provided near the reaction outlet 215 A second discharge valve 25 is in the form of a plate and is radially penetrated through the outer wall of the reaction container 21. The second discharge valve 25 has a feed hole 251 and a discharge channel 252. The second discharge valve 25 is connected to a hydraulic cylinder 253 on the outer wall of the reaction container 21 to drive the second discharge valve 25. When the second discharge valve 25 is in the first position as shown in FIG. 9, the two ends of the feed hole 251 are closed. The ends are respectively connected to the reaction chamber 211 and the reaction outlet 215, so that the reaction outlet 215 can output the plastic pellet raw material mixture. When the second discharge valve 25 is in the second position as shown in Figure 10, the reaction chamber 211 is connected to the discharge flow channel 252, so that the discharge flow channel 252 can output the plastic pellet raw material mixture and receive the plastic pellet raw material mixture through a container (not shown) to confirm the quality of the plastic pellet raw material mixture.

It is worth mentioning that the first storage barrels 123 may first meter out a portion of the isocyanate polymer containing NCO or a portion of the hydroxyl compound containing OH into the feed chamber 121, and then the second storage barrel 29 meter out the remaining portion of the isocyanate polymer containing NCO or the remaining portion of the hydroxyl compound containing OH into the reaction chamber 211. In a preferred embodiment of the present invention, the first storage barrels 123 first meter out about 50% to less than 100% of the isocyanate polymer containing NCO into the feed chamber 121, and then the second storage barrel 29 meter out about less than 50% of the isocyanate polymer containing NCO into the reaction chamber 211. In another preferred embodiment of the present invention, the first storage barrels 123 first meter out about 50% to less than 100% of the hydroxyl compound containing OH into the feed chamber 121, and then the second storage barrel 29 meter out about less than 50% of the hydroxyl compound containing OH into the reaction chamber 211. In this way, the isocyanate polymer containing NCO or the hydroxyl compound containing OH can avoid the violent reaction of the plastic pellet raw material mixture to generate crystal points through the secondary output method, thereby further improving the quality and yield of the plastic pellets of the present invention.

A reaction kneading and escorting device 30 is connected to the reaction device 20 in a sealed manner and includes a reaction kneading and escorting container 31. A reaction kneading and escorting chamber 311 is formed in the reaction kneading and escorting container 31. The reaction kneading and escorting chamber 311 is connected to the reaction device 20 for receiving the plastic pellet raw material mixture output from the reaction device 20. One end of the reaction kneading and escorting container 31 is provided with a third motor 32. The third motor 32 is provided with a second gear box 33. The reaction kneading and escorting container 31 is provided with a third motor 32 at one end thereof. A reaction kneading and escorting inlet 312 is hollowed out on the wall edge, so that the reaction kneading and escorting chamber 311 and the reaction device 20 are connected to each other. A reaction kneading and escorting outlet 313 is hollowed out at the other end of the reaction kneading and escorting chamber 311. The third motor 32 is connected to a pair of reaction kneading and escorting screws 34 parallel to each other, and the reaction kneading and escorting screws 34 are arranged in the reaction kneading and escorting chamber 311 and can be driven by the third motor 32 to react, knead and escort the granule raw material mixture and then output it, thereby completing the mixing reaction, kneading and escorting operations.

Please refer to FIG. 11 for the combination. The reaction kneading and escorting device 30 is provided with a feed port 314 at the outer wall edge near the reaction kneading and escorting entrance 312. The feed port 314 is connected to a feed device 39 in a sealed manner. The feed device 39 includes a feed container 391. A feed chamber 392 is formed in the feed container 391. The feed chamber 392 is connected to the reaction kneading and escorting chamber 311. One end of the feed container 391 is provided with a fourth motor 393. The fourth motor 393 is provided with a third gear box 394. The feed container 391 is provided with a funnel 395 at the outer wall edge of one end near the fourth motor 393. The funnel 395 is connected to the feed chamber 392. The funnel 395 can receive a modified material. The modified material is styrene-ethylene-butadiene-styrene (Styrene-Ethylene-Butadiene-Styrene, SEBS), styrene-butadiene rubber (Styrene-Butadiene Rubber, SBR), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), polyethylene terephthalate (Polyethylene Eerephthalate, PET), polystyrene (Polystyrene, PS) and extruded polystyrene foam plastic (extruded polystyrene foam, XPS) or a combination thereof, the other end of the feed chamber 392 is further provided with a feed outlet 396 connected to the feed port 314, the fourth motor 393 is connected to a pair of feed screws 397 parallel to each other, and the feed screws 397 are arranged in the feed chamber 392 and can be driven by the fourth motor 393 to escort the modified material and output it to the reaction kneading and escorting chamber 311, thereby completing the feeding operation, whereby, when the reaction and mixing degree of the plastic pellet raw material mixture is about 50% to 80%, the modified material is mixed again, so that the plastic pellet raw material mixture continues to react and mix into macromolecules, and participates in the connection of the modified material to form a TPU copolymer.

An underwater pelletizing device 40, as shown in FIG. 12, is connected to the mixing device 10 in a sealed manner, and is connected to the reaction kneading and conveying outlet 313 of the reaction kneading and conveying device 30, for receiving the plastic pellet raw material mixture output from the reaction kneading and conveying device 30, and cooling and shaping the plastic pellet raw material mixture and cutting it into a plurality of plastic pellets. The underwater pelletizing device 40 includes a die head 41, a cutting device 42, and a cooling device 43. The die head 41 includes a plurality of die holes 411, and the die holes 411 are connected to the reaction kneading and conveying outlet 313. The cutting device 4 2 is provided with a plurality of blades 421 and a motor 422, the blades 421 are pressed against the die head 41, the motor 422 is connected to and can rotate the blades 421, the cutting device 42 is connected to the cooling device 43, and the cooling device 43 is a pipe body for cooling water to flow, thereby, when the underwater pelletizing is performed, the plastic pellet raw material mixture can be extruded from the die holes 411, and then the extruded plastic pellet raw material mixture is cooled and molded by the cooling device 43, and at the same time, the plastic pellet raw material mixture that has been cooled and molded can be cut into plastic pellets by rotating the blades 421 of the cutting device 42.

Among them, a third discharge valve 35, a melt pump 36, a double-drum screen changer 37, and a fourth discharge valve 38 are sequentially connected between the reaction kneading and conveying outlet 313 of the reaction kneading and conveying device 30 and the die head 41 of the underwater pelletizing device 40. The third discharge valve 35 and the fourth discharge valve 38 are the same as the first discharge valve 15 and the second discharge valve 25 mentioned above, and are not described separately. The melt pump 36 transports the plastic pellet raw material mixture to the underwater pelletizing device 40. The double-drum screen changer 37 has a pair of filters 371, and the filters can be replaced without stopping the machine, and impurities or foreign matter in the plastic pellet raw material mixture can be filtered.

A crystallization device 50 is a base having a crystallization flow channel 51 connected to the underwater pelletizing device 40. The crystallization flow channel 51 is a continuous S-shaped flow channel. The crystallization flow channel 51 is used to receive the plastic pellets and water flow output from the underwater pelletizing device 40, and gradually react and mix the plastic pellets at a temperature between 5 degrees C and 80 degrees C according to the hardness requirements to form macromolecular crystals, so that the plastic pellets have better physical properties and can withstand high temperatures.

A dehydration device 60 is connected to the crystallization device 50, and the dehydration device 60 includes an outer cover 61, a feed port 62 engraved at the bottom of the outer wall edge of the outer cover 61, a discharge port 63 engraved at the top of the outer wall edge of the outer cover 61, a particle storage tank 64 connected to the discharge port 63, a motor 65 disposed at the top of the outer cover 61, a shaft 66 located inside the outer cover 61 and connected to the motor, a plurality of feed plates 67 obliquely disposed on the shaft 66, a feed plate 67 disposed between the outer cover 61 and the outer cover 61, and a feed plate 68 disposed between the outer cover 61 and the outer cover 61. The filter screen 68 between the feed plates 67 and the water tank 69 below the outer cover 61, wherein the feed plates 67 are arranged in a stepped or spiral shape, whereby the feed port 62 is used to receive the plastic pellets in the crystallization flow channel 51 and transport them to the feed plates 67, the feed plates 67 will rotate to generate centrifugal force for dehydration, and finally the dehydrated plastic pellets will be discharged from the discharge port 63 to the pellet storage tank 64, and the water tank 69 will recycle the removed water for reuse by the cooling device 43.

A drying device 70 is connected to the dehydration device 60. The drying device 70 has a vacuum suction machine 71 and a dry moisture storage machine 72. The vacuum suction machine 71 has a cavity 711, a suction pipe 712 connected to the top of the cavity 711, and a discharge port 713 arranged at the bottom of the cavity 711. The dry moisture storage machine 72 has a molecular sieve dehumidification wheel 721, an exhaust pipe 722 arranged at the discharge port 712, and a The suction pipe 723 at the top allows the suction pipe 712 to suck the plastic pellets from the pellet storage tank 64 and transport them to the cavity 711 for pellet storage. The suction pipe 723 can suck the gas in the cavity 711 and dehumidify it through the molecular sieve dehumidification wheel 721. The dry gas is then discharged from the exhaust pipe 722 to dry the plastic pellets in the cavity 711 and discharged to the packaging machine through the discharge port 712. The plastic pellets can then be sent downstream to be made into various products.

In order to further understand the structural features, applied technical means and expected effects of the present invention, the use of the present invention is described below. It is believed that this will provide a deeper and more specific understanding of the present invention, as described below:

Please continue to refer to Figures 1 to 3. Through the manufacturing method of TPU copolymer and the manufacturing equipment 100 of TPU copolymer, the user only needs to place the required raw materials such as NCO-containing isocyanate polymer, OH-containing hydroxyl compound and short chain extender in the first storage barrel 123, and output them to the feeding chamber 121 and the mixing chamber 131 for mixing, and then pour them into the reaction device 20 for mixing reaction, and then output them to the reaction kneading and escorting device 30 for mixing reaction, kneading and escorting operations. When the reaction and mixing degree of the plastic pellet raw material mixture is about 50%~80%, the modified material is further mixed through the feeding device 39 to make the plastic pellet raw material mixture continue to react. The TPU copolymer is formed by mixing with the modified substance to form a macromolecule and participates in the connection of the modified substance, so that the TPU copolymer has the characteristics of good wet anti-slip property, tear resistance, recovery, tensile strength, softness, toughness and recyclability, and the hardness of the TPU copolymer can be adjusted by changing the formula or proportion of TPU. Finally, the TPU copolymer is cooled and shaped and cut into plastic pellets by the underwater pelletizing device 40, the crystallization device 50, the dehydration device 60 and the drying device 70, thereby completing the plastic pellet manufacturing. In this way, in the mixing, reaction, reaction kneading and escorting process of the plastic pellet raw material mixture of the present invention, the emission of volatile organic compounds (VOC) is greatly reduced through a closed feeding environment, thereby avoiding environmental pollution and achieving an environmental protection effect.

It is worth mentioning that, by using the first storage barrels 123 and the second storage barrels 29, the isocyanate polymer containing NCO or the hydroxyl compound containing OH is outputted in a secondary manner, which can avoid the violent reaction of the plastic pellet raw material mixture to produce crystal points, thereby further improving the quality and output of the plastic pellets of the present invention.

Hereinafter, the features of the present invention and the expected effects that can be achieved are described as follows:

The TPU copolymer, the method for manufacturing the TPU copolymer and the equipment for manufacturing the TPU copolymer provided by the present invention are to mix the modified substance into the TPU when the TPU has not yet reacted completely, that is, when the reaction and mixing degree of the TPU is about 50% to 80%, wherein the TPU will continue to react and mix into a macromolecule, and at the same time, because the TPU has been independently polymerized by about 50% to 80%, it will be able to participate in the connection of the modified substance to form the TPU copolymer, so that the TPU copolymer has the characteristics of good wet anti-slip property, tear resistance, recovery, tensile strength, softness, toughness, and recyclability, and the softness and hardness of the TPU copolymer can be adjusted by changing the formula or proportion of the TPU.

In summary, the present invention is extremely advanced and practical in the same category of products. At the same time, after searching the technical data on this type of structure at home and abroad, no similar structure has been found in the literature. Therefore, the present invention has the patent requirements and is filed in accordance with the law.

However, what is described above is only a preferred embodiment of the present invention. Therefore, any equivalent structural changes made by applying the present invention specification and the scope of patent application should be included in the patent scope of the present invention.

100: TPU copolymer, method for producing TPU copolymer, and equipment for producing TPU copolymer

10: Mixing device

11: First Motor

12: First feeding head

121: Feeding chamber

122: Feeding hole

123: First storage tank

13: Mixing container

131: Mixing chamber

132: Mixed export

14: Mixing screw

15: First discharge valve

151: Feeding hole

152: Discharge channel

153:Hydraulic cylinder

20: Reaction device

21: Reaction container

211:Reaction Chamber

212: Reaction entrance

213: Feeding port

215: Reaction exit

22: Second Motor

23: First gear box

24: Reaction screw

25: Second discharge valve

251: Feeding hole

252: Discharge channel

253:Hydraulic cylinder

26: Second feeding head

261: Perforation

262: screw hole

263: Inlet channel

264: Closed

265: Pull rod

266: Plug

267: Elasticity Department

268:Connector

27: Knob

271: Stop

272: Elastic parts

28: Pump

29: Second storage tank

30: Reaction kneading escort device

31: reaction kneading escort container

311: Reaction kneading escort chamber

312: Reaction kneading escort entrance

313: Reaction kneading escort exit

314: Feeding port

32: The Third Motor

33: Second gear box

34: Reaction kneading conveyor screw

35: The third discharge valve

36: Melt pump

37:Double-drum screen changer

371: Filter

38: The fourth discharge valve

39: Feeding device

391: Feed container

392: Feeding chamber

393: Fourth Motor

394:Third gear box

395: Funnel

396: Import and export

397: Feed screw

40: underwater pelletizing device

41: Die head

411: Die hole

42: Cutting device

421: Blade

422: Motor

43: Cooling device

50: Crystallization device

51: Crystallization channel

60: Dehydration device

61: Outer cover

62: Feeding port

63: Discharge port

64: Grain storage tank

65: Motor

66: Shaft

67: Feeding plate

68: Filter

69: Sink

70: Drying device

71: Vacuum suction machine

711: Cavity

712: Suction pipe

713: Discharge port

72: Drying and humidifying machine

721: Molecular sieve dehumidification wheel

722: Exhaust pipe

723:Suction pipe

Figure 1 is a flowchart of the manufacturing method steps of the preferred embodiment of the present invention. Figure 2 is a schematic diagram of the combination of the preferred embodiment of the present invention. Figure 3 is a cross-sectional view of the combination of the preferred embodiment of the present invention. Figure 4 is a cross-sectional view of the first feed head. Figure 5 is a schematic diagram of the use of the preferred embodiment of the present invention, used to show the feeding state of the first discharge valve. Figure 6 is a schematic diagram of the use of the preferred embodiment of the present invention, used to show the discharge state of the first discharge valve. Figure 7 is a cross-sectional view of the combination of the second feed head of the present invention. Figure 8 is a schematic diagram of the use of the preferred embodiment of the present invention, used to show the feeding state of the second feed head. Figure 9 is a schematic diagram of the use of a better embodiment of the present invention, used to show the feeding state of the second discharge valve. Figure 10 is a schematic diagram of the use of a better embodiment of the present invention, used to show the discharge state of the second discharge valve. Figure 11 is a partial cross-sectional view of a better embodiment of the present invention, used to show the state of the feeding device. Figure 12 is a schematic diagram of a better embodiment of the present invention, used to show the state of the in-water pelletizing device, crystallization device, dehydration device and drying device.

Claims (6)

A TPU copolymer comprises: a 10-90wt% thermoplastic polyurethane and a 10-60wt% modifier, wherein the modifier is one of styrene-ethylene-butadiene-styrene (SEBS), acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene terephthalate (PET), polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof, wherein the modifier is mixed into the thermoplastic polyurethane when the thermoplastic polyurethane has not yet completely reacted, i.e., when the reaction and mixing degree of the thermoplastic polyurethane is about 50%-80%. According to the TPU copolymer described in claim 1, the modified product may further include a coupling agent, and the coupling agent may be a coupling agent having an OH group. A method for manufacturing a TPU copolymer comprises the following steps: a material preparation step: preparing an isocyanate polymer containing NCO, a hydroxyl compound containing OH and a chain extender; a primary mixing step: mixing the isocyanate polymer containing NCO, the hydroxyl compound containing OH and the chain extender to form a mixture; a reaction step: reacting the mixture to gradually react and mix the mixture; a secondary mixing step: preparing a modified product, the modified product being styrene-ethylene-butadiene-styrene (Styrene-Ethylene-Butadiene-Styrene, SEBS), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), polyethylene terephthalate (Polyethylene Eerephthalate, PET), polystyrene (Polystyrene, PS) and extruded polystyrene foam (extruded polystyrene foam, XPS) or a combination thereof, and when the mixture has not yet completely reacted, that is, when the reaction and mixing degree of the mixture is about 50% to 80%, the mixture is further mixed with the modified substance; reaction kneading and escorting step: continuously kneading the mixture and the modified substance, wherein the mixture will continue to react and mix into macromolecules, and at the same time participate in the connection of the modified substance to form a TPU copolymer. According to the TPU copolymer described in claim 3, after the reaction kneading and escorting step, there is a finishing step, in which the TPU copolymer is pelletized, crystallized, dehydrated and dried in water and shaped into a TPU copolymer pelletized product. A manufacturing device for TPU copolymers comprises: a mixing device, comprising a first motor, a first feed head and a mixing container which are connected to each other in a sealed manner, wherein the first feed head has a feed chamber, the first feed head is connected to a plurality of first storage barrels, the first storage barrels are used to store thermoplastic polyurethane raw materials and can be metered and output to the feed chamber, the mixing container is formed with a mixing chamber connected to the feed chamber, a pair of mixing screws parallel to each other are arranged in the mixing chamber, the mixing screws are connected to the first motor, , used to mix the thermoplastic polyurethane raw material into a mixture; a reaction device, which includes a reaction container, a reaction chamber connected to the mixing device is formed in the reaction container, one end of the reaction container is provided with a second motor, the second motor is connected to a pair of parallel reaction screws, and the reaction screws are arranged in the reaction chamber and can be driven by the second motor to react and output the mixture; a reaction kneading and escorting device, which includes a reaction kneading and escorting container, a reaction kneading and escorting container is formed in the reaction kneading and escorting container There is a reaction kneading and escorting chamber connected to the reaction device, and one end of the reaction kneading and escorting chamber is provided with a third motor, and the third motor is connected to a pair of parallel reaction kneading and escorting screws, and the reaction kneading and escorting screws are arranged in the reaction kneading and escorting chamber, and can be driven by the third motor to react, knead and escort the mixture and then output it; the reaction kneading and escorting device is provided with a feed port on the outer wall edge near the reaction kneading and escorting inlet, and the feed port is connected to a feed device in a sealed manner, and the feed device includes a feed container ... A feed chamber is formed in the material container, and the feed chamber is connected to the reaction kneading and conveying chamber. A fourth motor is provided at one end of the feed container, and a funnel is provided at the outer wall edge of one end of the feed container near the fourth motor, and the funnel is connected to the feed chamber. The funnel can receive a modified material, and the modified material is styrene-ethylene-butadiene-styrene (Styrene-Ethylene-Butadiene-Styrene, SEBS), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), Polyethylene Eerephthalate (PET), Polystyrene (PS) and extruded polystyrene foam (XPS) or a combination thereof, the fourth motor is connected to a pair of parallel feeding screws, and the feeding screws are arranged in the feeding chamber and can be driven by the fourth motor to convey the modified material and output it to the reaction kneading and conveying chamber, thereby completing the feeding operation, wherein the modified material is mixed into the thermoplastic polyurethane when the mixture has not yet reacted completely, that is, when the reaction and mixing degree of the thermoplastic polyurethane is about 50% to 80%. The manufacturing equipment of TPU copolymer according to claim 5 further comprises an underwater pelletizing device, which is connected to the reaction kneading and conveying device, for receiving the plastic pellet raw material mixture output from the reaction kneading and conveying device, and cooling and shaping the plastic pellet raw material mixture and cutting it into a plurality of plastic pellets.

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