CN118024692A - Soft LVT floor and manufacturing method thereof - Google Patents

Abstract

The embodiment of the application provides a soft LVT floor and a manufacturing method thereof, belonging to the technical field of floors. The soft LVT floor comprises a base layer raw material and a warp-stopping layer raw material, wherein the base layer raw material comprises the following components in parts by weight: 10-20 parts of PVC resin powder, 4-8 parts of plasticizer, 40-60 parts of calcium carbonate, 20-30 parts of LVT powder recovery material, 0.8-1 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 part of internal lubricant and 0.1-0.5 part of external lubricant; the anti-warping layer comprises the following raw materials in parts by weight: 60-80 parts of PVC resin powder, 20-30 parts of plasticizer, 10-20 parts of light calcium carbonate, 0.1-1.0 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 part of inner lubricant and 0.2-0.5 part of outer lubricant. The manufacturing method of the soft LVT floor can simplify the production process of the LVT floor and reduce the production cost.

Description

A soft LVT floor and a manufacturing method thereof

Technical Field

The present application relates to the field of floor technology, and in particular to a soft LVT floor and a manufacturing method thereof.

Background technique

At present, the full name of LVT floor is high-grade vinyl floor tile. LVT floor is a high-grade elastic stone-plastic floor that can realistically simulate wood grain and stone floor. LVT floor has the advantages of good anti-slip performance, wear resistance, green environmental protection and non-toxicity. LVT floor has now become a very popular new type of lightweight floor decoration material and is sought after by more and more people.

However, the production process of soft LVT floor is complicated, and it is generally formed by hot pressing. For example, the patent with publication number CN109206781A discloses an LVT floor and its preparation method. The LVT floor is mainly manufactured through complex processes such as mixing of mid-base materials, kneading, calendering, cutting of wear-resistant layer, cutting of color film, hot pressing, high-temperature tempering, surface UV and punching and slicing. There are problems such as large investment scale, high energy consumption, high labor demand and long production cycle, which leads to high cost and difficulty in the production of soft LVT floor.

Summary of the invention

The embodiments of the present application provide a soft LVT floor and a method for manufacturing the same, which can simplify the production process of the LVT floor and reduce production costs.

In the first aspect, an embodiment of the present application provides a soft LVT floor, which includes a base material and an anti-warping layer material. The base material includes, by weight: 10-20 parts of PVC resin powder, 4-8 parts of plasticizer, 40-60 parts of calcium carbonate, 20-30 parts of LVT ground powder recovery material, 0.8-1 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 parts of internal lubricant and 0.1-0.5 parts of external lubricant; the anti-warping layer material includes, by weight: 60-80 parts of PVC resin powder, 20-30 parts of plasticizer, 10-20 parts of light calcium carbonate, 0.1-1.0 parts of stabilizer, 0.5-1.0 parts of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 parts of internal lubricant and 0.2-0.5 parts of external lubricant.

In this scheme, by improving the base material and the anti-warping layer material, additives, internal lubricants and external lubricants are introduced into the base material and the anti-warping layer material. In the online extrusion molding process of LVT flooring, the production needs of soft LVT flooring are met. The additives can promote PVC plasticization, reduce processing temperature, and improve the surface gloss of the product, while the internal lubricant can improve the internal friction heat generation of the plastic melt and the fluidity of the melt. The addition of smoke suppressant can accelerate the carbonization process and absorb HCI through adsorption and reaction when the floor is burned and decomposed, and accelerate the oxidation of carbon particles in the gas phase; the external lubricant improves the fluidity between the material and the equipment barrel and in the mold, reduces the friction between the material and the equipment, and improves the plasticization of the material. In this way, the base material layer can be extruded online at one time in the extrusion molding process, eliminating the hot pressing, tempering, wear-resistant layer cutting and color film cutting links in the LVT floor production process in the prior art, reducing labor costs and energy consumption costs, and improving the production efficiency of soft LVT flooring.

In some embodiments, the base material includes, by weight, 15 parts of PVC resin powder, 5 parts of plasticizer, 50 parts of calcium carbonate, 27 parts of LVT ground powder recycling material, 0.9 parts of stabilizer, 0.6 parts of additive, 1 part of smoke suppressant, 0.3 parts of internal lubricant and 0.2 parts of external lubricant.

In some embodiments, the raw materials for the anti-warping layer include, by weight: 65 parts of PVC resin powder, 22 parts of plasticizer, 10 parts of light calcium carbonate, 0.9 parts of stabilizer, 0.7 parts of auxiliary agent, 1 part of smoke suppressant, 0.2 parts of internal lubricant and 0.2 parts of external lubricant.

In some embodiments, the smoke suppressant includes one or more of a composite smoke suppressant, a metal oxide smoke suppressant, a metal hydroxide smoke suppressant, a borate smoke suppressant, or a molybdenum smoke suppressant.

In some embodiments, the internal lubricant is stearic acid and the external lubricant is polyethylene wax.

In the above technical scheme, stearic acid plays a role in reducing the cohesive force between polymer molecules inside the polymer, thereby improving the internal friction heat generation of the plastic melt and the fluidity of the melt. The role of polyethylene wax is to improve the fluidity between the material and the equipment barrel and the mold, reduce the friction between the material and the equipment, and improve the plasticization of the material.

In the second aspect, the embodiment of the present application also provides a manufacturing method for a soft LVT floor, and the manufacturing method includes the following steps: Step A: mixing; adding the base material into a first high-speed mixer and mixing and stirring to obtain a first mixture, and the first mixture is mixed to a semi-plasticized state and then discharged to a first low-speed mixer for cooling and stirring; adding the anti-warping layer raw material into a second high-speed mixer and stirring to obtain a second mixture, and the second mixture is mixed to a semi-plasticized state and then discharged to a second low-speed mixer for cooling and stirring; Step B: extrusion; the first mixture and the second mixture obtained in step A are respectively placed into a first storage bin and a second storage bin, and the first mixture and the second mixture are respectively fed into a first extruder and a second extruder for extrusion processing through an automatic feeding system, and the extruded materials of the first extruder and the second extruder are distributed by a distributor and then enter a mold for composite extrusion to obtain a substrate layer; Step C: bonding; the composite extruded substrate layer in step B is introduced into a five-roll bonding device, and a color film layer and a wear-resistant layer are bonded on the substrate layer to make an LVT floor.

In this solution, the manufacturing method of LVT flooring is based on the existing hard SPC flooring manufacturing process, a mixing-extrusion-lamination process is adopted, and further improvements are made on the basis of the formula of LVT flooring to meet the production needs of soft LVT flooring, so that soft LVT flooring can be extruded online at one time, eliminating the processes of hot pressing, tempering, wear-resistant layer cutting, color film cutting, etc. in traditional technologies, greatly reducing labor costs and energy consumption costs, and improving the production efficiency of soft LVT.

In some embodiments, when adding the base raw materials to the first high-speed mixer in step A, the PVC resin powder, calcium carbonate, LVT ground powder recovery material and 1/2 of the plasticizer to be added in the base raw materials are first added to the first high-speed mixer and stirred for 1-2 minutes to allow the materials to be preliminarily mixed, and then stabilizers, additives, smoke suppressants, internal lubricants, external lubricants and the remaining 1/2 of the plasticizer are added to obtain a first mixture.

In the above technical solution, by adding the plasticizer in two times, the probability of raw materials existing in the base raw material due to uneven stirring during the material mixing process can be reduced, so that the material mixing is more uniform.

In some embodiments, when the anti-warping layer raw material is added to the second high-speed mixer for stirring in step A, the temperature rises to 125-145° C. and the second mixed material is mixed to a semi-plasticized state before being fed to the second low-speed mixer.

In some embodiments, in step B, when the first mixture in the first low-speed mixer and the second mixture in the second low-speed mixer are stirred and cooled to 50-60°C, the cooled and stirred first mixture and the second mixture are respectively placed in the first storage bin and the second storage bin.

In some embodiments, in step B, the temperature of barrel zone 1 of the first extruder is 200±10°C, the temperature of barrel zone 2 is 195±10°C, the temperature of barrel zone 3 is 190±10°C, the temperature of barrel zone 4 is 185±10°C, and the temperature of barrel zone 5 is 180±10°C.

In the above technical solution, the extrusion temperature of the first extruder is designed as a "step-type" to reduce the wear of the screw barrel, improve the plasticizing efficiency and avoid the occurrence of paste.

In some embodiments, the temperature of barrel zone 1 of the second extruder is 190±10°C, the temperature of barrel zone 2 is 185±10°C, the temperature of barrel zone 3 is 180±10°C, the temperature of barrel zone 4 is 175±10°C, and the temperature of barrel zone 5 is 170±10°C.

In the above technical solution, the extrusion temperature of the second extruder is also designed as a "step-type" to reduce the wear of the screw barrel, improve the plasticizing efficiency and avoid the occurrence of paste.

Other features and advantages of the present application will be described in detail in the subsequent specific implementation section.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Example

The embodiment of the present application provides a soft LVT floor, which includes a base material and an anti-warping layer material. The base material includes, by weight: 10-20 parts of PVC resin powder, 4-8 parts of plasticizer, 40-60 parts of calcium carbonate, 20-30 parts of LVT ground powder recovery material, 0.8-1 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 parts of internal lubricant and 0.1-0.5 parts of external lubricant; the anti-warping layer material includes, by weight: 60-80 parts of PVC resin powder, 20-30 parts of plasticizer, 10-20 parts of light calcium carbonate, 0.1-1.0 parts of stabilizer, 0.5-1.0 parts of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 parts of internal lubricant and 0.2-0.5 parts of external lubricant.

In this scheme, by improving the base material and the anti-warping layer material, additives, smoke suppressants, internal lubricants and external lubricants are introduced into the base material and the anti-warping layer material. In the online extrusion molding process of LVT flooring, the production requirements of soft LVT flooring are met. The additives can promote PVC plasticization, reduce processing temperature, and improve the surface gloss of the product, while the internal lubricant can improve the internal friction heat generation of the plastic melt and the fluidity of the melt. The addition of smoke suppressants can accelerate the carbonization process and absorb HCI through adsorption and reaction when the floor is burned and decomposed, and accelerate the oxidation of carbon particles in the gas phase. The external lubricant improves the fluidity of the material and the equipment barrel and in the mold, reduces the friction between the material and the equipment, and improves the plasticization of the material. In this way, the base material layer can be extruded online at one time in the extrusion molding process, eliminating the hot pressing, tempering, wear-resistant layer cutting, color film cutting and other links in the LVT flooring production process in the prior art, reducing labor costs and energy consumption costs, and improving the production efficiency of soft LVT flooring.

Among them, the plasticizer used is plasticizer DOTP, the PVC resin powder is PVC resin SG5, and the additives are acrylate, CPE, and composite processing aids.

In some embodiments, the smoke suppressant is a combination of one or more of a composite smoke suppressant, a metal oxide smoke suppressant, a metal hydroxide smoke suppressant, a borate smoke suppressant, a molybdenum smoke suppressant, and the like.

In this embodiment, the smoke suppressant is preferably a metal oxide smoke suppressant or a molybdenum smoke suppressant.

Among them, the metal oxide smoke suppressants are zinc oxide, copper oxide, etc., preferably copper oxide; the molybdenum smoke suppressants are ammonium octamolybdate, zinc molybdate, calcium molybdate, cobalt molybdate and molybdenum trioxide, etc., preferably molybdenum trioxide.

When the ratio of copper oxide to molybdenum trioxide is 3:2, the smoke suppression effect is best.

By including copper oxide and molybdenum trioxide in the smoke suppressant, the floor can accelerate the carbonization process and absorb HCI through adsorption and reaction when it is burned and decomposed, and accelerate the carbon particles in the oxidation gas phase, which can effectively reduce the smoke density when the floor is burned. The internal lubricant is internal lubricant CA80, and the external lubricant is PE wax. Plasticizer increases the plasticity of plastic, weakens the secondary bonds between resin molecules, increases the mobility of resin molecular bonds, reduces the crystallinity of resin molecules, increases the plasticity of resin molecules, enhances its flexibility, and makes it easy to process. Calcium carbonate plays a filling role and can effectively improve stability. The components of LVT milling recycled materials are mainly LVT scraps and slotted gray milling, and the powder mesh number is 400. The stabilizer can be an environmentally friendly rare earth stabilizer or a composite stabilizer. Its main function is to inhibit the premature decomposition of polyvinyl chloride during processing, so that the formula system has sufficient stability.

In some embodiments, the base material includes, by weight, 15 parts of PVC resin powder, 5 parts of plasticizer, 50 parts of calcium carbonate, 27 parts of LVT ground powder recycling material, 0.9 parts of stabilizer, 0.6 parts of additive, 1 part of smoke suppressant, 0.3 parts of internal lubricant and 0.2 parts of external lubricant.

In some embodiments, the raw materials for the anti-warping layer include, by weight: 65 parts of PVC resin powder, 23 parts of plasticizer, 10 parts of light calcium carbonate, 0.9 parts of stabilizer, 0.7 parts of auxiliary agent, 1 part of smoke suppressant, 0.2 parts of internal lubricant and 0.2 parts of external lubricant.

In some embodiments, the internal lubricant is stearic acid and the external lubricant is polyethylene wax. Stearic acid reduces the cohesive force between polymer molecules inside the polymer, thereby improving the internal friction heat generation of the plastic melt and the fluidity of the melt. The role of polyethylene wax is to improve the fluidity between the material and the equipment barrel and the mold, reduce the friction between the material and the equipment, and improve the plasticization of the material.

In a second aspect, the present application also provides a method for manufacturing a soft LVT floor, the manufacturing method comprising the following steps:

Step A: Add the PVC resin powder, calcium carbonate, LVT milled recycled material and 1/2 of the required plasticizer in the base material to the first high-speed mixer and stir for 1-2 minutes to make the materials preliminarily mixed, then add another 1/2 of the required plasticizer and stabilizer, additive, smoke suppressant, internal lubricant and external lubricant, start the first high-speed mixer again, raise the temperature to 125-145°C, mix the mixture to a semi-plasticized state, and then feed it to the first low-speed mixer for cooling and stirring. Put the anti-warping layer raw materials into the second high-speed mixer at one time, raise the temperature to 125-145°C, mix the second mixture to a semi-plasticized state, and then feed it to the second low-speed mixer for cooling and stirring.

Step B: Stir and cool the first mixed material and the second mixed material in step A to 50-60°C and put them into the first storage bin and the second storage bin respectively, and feed the first mixed material and the second mixed material into the conical twin-screw extruder and the flat twin-screw extruder for extrusion processing through the automatic feeding system. The extruded materials of the first extruder and the second extruder are distributed by the distributor and then enter the mold for composite extrusion. The first extruder, i.e. the conical twin-screw extruder: the temperature of the first barrel zone is 200±10°C, the temperature of the second barrel zone is 195±10°C, the temperature of the third barrel zone is 190±10°C, the temperature of the fourth barrel zone is 185±10°C, and the temperature of the fifth barrel zone is 180±10°C. The second extruder, i.e. the parallel twin-screw extruder: the temperature of the barrel zone 1 is 190±10℃, the temperature of the barrel zone 2 is 185±10℃, the temperature of the barrel zone 3 is 180±10℃, the temperature of the barrel zone 4 is 175±10℃, and the temperature of the barrel zone 5 is 170±10℃. The temperature of the mold adopts seven-stage temperature control, and the temperatures of the mold from one to seven are 220℃, 215℃, 215℃, 210℃, 210℃, 215℃, and 220℃ respectively.

By setting the temperature of the mold to be low in the middle and high on both sides and the overall temperature setting to be higher than the barrel temperature, the melt can be extruded from the die immediately when it reaches the optimal plasticization degree, so as to achieve molding under the optimal plasticization state without decomposing due to high temperature for too long, and to appropriately improve the surface brightness of the product. It can also reduce the internal pressure of the extruder. When the internal pressure of the extruder is reduced, the friction shear force will also be reduced, which can reduce the extrusion load of the extrusion screw and extend the service life of the screw.

Step C: Introduce the LVT composite substrate into a five-roll laminating device. The five-roll laminating device can be purchased directly. The five-roll laminating device determines the thickness of the substrate layer through the gap between the first roller and the second roller; the wear-resistant layer and the color film are laminated on the third roller; the fourth roller is used to calender the board surface pattern; the fifth roller is used to calender the back pattern, wherein the temperature of the first, second and third calendering rollers is 195±10℃, and the fourth and fifth rollers are cold rollers with a temperature of 35±5℃.

In this solution, the manufacturing method of LVT flooring is based on the existing hard SPC flooring manufacturing process, a mixing-extrusion-lamination process is adopted, and further improvements are made on the basis of the formula of LVT flooring to meet the production needs of soft LVT flooring, so that soft LVT flooring can be extruded online at one time, eliminating the processes of hot pressing, tempering, wear-resistant layer cutting, color film cutting, etc. in traditional technologies, greatly reducing labor costs and energy consumption costs, and improving the production efficiency of soft LVT.

Example 1

The base material includes 15 parts of PVC resin SG5; 5 parts of plasticizer DOTP; 50 parts of calcium carbonate (mesh size 400); 27 parts of LVT milled recycled material; 0.9 parts of stabilizer; 0.6 parts of additive 908; 1 part of smoke suppressant; 0.3 parts of internal lubricant CA80; 0.2 parts of external lubricant PE wax

The raw materials of the anti-warping layer include 65 parts of PVC resin SG5; 23 parts of plasticizer DOTP; 10 parts of light calcium carbonate (mesh size 1250); 0.9 parts of stabilizer; 0.7 parts of auxiliary agent 908; 1 part of smoke suppressant; 0.2 parts of internal lubricant CA80; and 0.2 parts of external lubricant PE wax.

Compared with Example 1, the components of Example 2 and Example 3 are different, and the specific differences are shown in Table 1:

Table 1

The test data of the embodiment are shown in Table 2:

Test items Example 1 Example 2 Example 3 shrink(%) 0.03 0.03 0.04 Warpage(mm) 0.5 1.2 2.1 Smoke density Dm 147.38 147.48 147.66

Table 2

It can be concluded from Table 2 that the present invention makes the LVT flooring material layer have excellent flame retardant and smoke suppression properties through the ratio of each component, and the content of calcium carbonate component in the anti-warping layer is inversely proportional to the warping, and the higher the calcium carbonate content, the worse the warping.

It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The soft LVT floor is characterized by comprising a base layer raw material and a warping-stopping layer raw material, wherein the base layer raw material comprises the following components in parts by weight: 10-20 parts of PVC resin powder, 4-8 parts of plasticizer, 40-60 parts of calcium carbonate, 20-30 parts of LVT powder recovery material, 0.8-1 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 part of internal lubricant and 0.1-0.5 part of external lubricant; the anti-warping layer comprises the following raw materials in parts by weight: 60-80 parts of PVC resin powder, 20-30 parts of plasticizer, 10-20 parts of light calcium carbonate, 0.1-1.0 part of stabilizer, 0.5-1.0 part of auxiliary agent, 0.5-2 parts of smoke suppressant, 0.2-0.5 part of inner lubricant and 0.2-0.5 part of outer lubricant.

2. The soft LVT floor of claim 1, wherein the base stock comprises, by weight, 15 parts of PVC resin powder, 5 parts of plasticizer, 50 parts of calcium carbonate, 27 parts of LVT mill recovery, 0.9 parts of stabilizer, 0.6 parts of auxiliary agent, 1 part of smoke suppressant, 0.3 parts of inner lubricant, and 0.2 parts of outer lubricant.

3. The soft LVT floor of claim 1, wherein the anti-warping layer comprises 65 parts by weight of PVC resin powder, 22 parts by weight of plasticizer, 10 parts by weight of light calcium carbonate, 0.9 part by weight of stabilizer, 0.7 part by weight of auxiliary agent, 1 part by weight of smoke suppressant, 0.2 part by weight of inner lubricant, and 0.2 part by weight of outer lubricant.

4. The soft LVT floor of claim 1, wherein the smoke suppressant comprises one or more of a composite smoke suppressant, a metal oxide smoke suppressant, a metal hydroxide smoke suppressant, a borate smoke suppressant, or a molybdenum smoke suppressant; the inner lubricant is stearic acid and the outer lubricant is polyethylene wax.

5. A method of manufacturing a soft LVT floor, based on a soft LVT floor according to any one of claims 1-4, comprising the steps of:

Step A: mixing materials; adding the base material into a first high-speed stirrer, mixing and stirring to obtain a first mixture, and discharging the first mixture to a first low-speed stirrer for cooling and stirring after the first mixture is mixed to a semi-plasticizing state; adding the raw material of the warp-stopping layer into a second high-speed stirrer for stirring to obtain a second mixture, and discharging the second mixture to a second low-speed stirrer for cooling and stirring after the second mixture is mixed to a semi-plasticizing state;

And (B) step (B): extruding; the first mixed material and the second mixed material obtained in the step A are respectively put into a first storage bin and a second storage bin, the first mixed material and the second mixed material are respectively sent into a first extruder and a second extruder for extrusion processing through an automatic feeding system, and extrusion materials of the first extruder and the second extruder enter a die for composite extrusion after being distributed through a distributor, so that a substrate layer is obtained;

step C: fitting; and B, introducing the substrate layer subjected to the composite extrusion in the step B into five-roller laminating equipment, and laminating the color film layer and the wear-resistant layer on the substrate layer to prepare the LVT floor.

6. The method of manufacturing a soft LVT floor according to claim 5, wherein when the base material is added to the first high-speed mixer in the step a, 1/2 of the PVC resin powder, the calcium carbonate, the LVT mill recycled material and the plasticizer to be added in the base material are added to the first high-speed mixer first, and stirred for 1-2 minutes, and then the stabilizer, the auxiliary agent, the smoke suppressant, the internal lubricant, the external lubricant and the remaining 1/2 plasticizer are added to obtain the first mixture after the materials are primarily mixed.

7. The method of manufacturing a soft LVT floor according to claim 5, wherein, when the raw material of the warp stop layer is added to the second high-speed mixer for mixing in the step a, the temperature is raised to 125-145 ℃ and the second mixture is mixed to a semi-plasticized state and then fed to the second low-speed mixer.

8. The method of manufacturing a soft LVT floor of claim 5, wherein in the step B, when the first mix in the first low speed mixer and the second mix in the second low speed mixer are stirred and cooled to 50-60 ℃, the cooled and stirred first mix and second mix are placed into a first storage bin and a second storage bin, respectively.

9. The method of manufacturing a soft LVT floor of claim 5, wherein in the step B, the temperature of the first zone of the cylinder of the first extruder is 200±10 ℃, the temperature of the second zone of the cylinder is 195±10 ℃, the temperature of the third zone of the cylinder is 190±10 ℃, the temperature of the fourth zone of the cylinder is 185±10 ℃, and the temperature of the fifth zone of the cylinder is 180±10 ℃.

10. The method of manufacturing a soft LVT floor according to claim 5, wherein the temperature of the first zone of the barrel of the second extruder is 190±10 ℃, and the temperature of the second zone of the barrel is 185±

The temperature of the third area of the material cylinder is 180+/-10 ℃, the temperature of the fourth area of the material cylinder is 175+/-10 ℃, and the temperature of the fifth area of the material cylinder is 170+/-10 ℃.