Preparation method of halogen-free flame-retardant macromolecular waterproof coiled material main body material

Abstract

The invention discloses a preparation method of a halogen-free flame-retardant macromolecular waterproof coiled material main body material, and relates to the technical field of waterproof coiled material production.The method comprises the following steps that an intumescent flame retardant with modified starch as a carbon source and superfine metal hydroxide are compounded to obtain a composite flame retardant; the compound raw materials are accurately fed and proportioned through the feeding system; mixing a composite elastomer, an ultraviolet light initiator, a cross-linking agent, an antioxidant, polyolefin and the compounded composite flame retardant serving as raw materials, and putting into a double-screw extruder; carrying out pre-granulation treatment after extruding and plasticizing, re-plasticizing through a single-screw extruder, and then extruding into a mold to obtain a waterproof base layer sheet; and cooling and molding. Airflow enters from the air inlet through the elastic tarpaulin and is blown out from the air supply net, and at the moment, when the rotating rollers rotate, powdery raw materials at the bottom can generate a fluidization effect, so that the materials are prevented from caking, and a guarantee is provided for accurate feeding and proportioning of the materials.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof coiled material production, and in particular to a method for preparing a main body material of a halogen-free flame-retardant polymer waterproof coiled material. Background Art

[0002] Halogen-free flame-retardant polymer waterproof membrane is mainly used for underground waterproofing, drainage, and anti-seepage projects. It realizes "skin-like" bonding between the buffer layer, waterproof layer and concrete structure. It can effectively solve the safety problems such as water channeling and leakage caused by hard object damage, ground subsidence and other reasons in underground waterproof projects, effectively extend the service life of waterproof materials, reduce the probability of water seepage accidents, and protect people's lives and property.

[0003] However, the production of the roll material requires the use of a highly efficient flame-retardant, smoke-suppressing, and environmentally friendly composite flame retardant as a raw material. The main components of this flame retardant are an expandable flame retardant with powdered modified starch as a carbon source and ultrafine metal hydroxide. Therefore, during compounding, the raw materials at the bottom of the raw material hopper are squeezed against each other and easily form lumps, which indirectly leads to errors in the raw material ratio, thereby affecting the quality of the subsequent waterproof roll material. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing method for preparing the main body material of the halogen-free flame-retardant polymer waterproof coiled material, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for preparing a main body material of a halogen-free flame-retardant polymer waterproof coiled material, the method comprising the following steps:

[0008] Step 1: flame retardant compounding, using modified starch as the carbon source of the intumescent flame retardant and ultra-fine metal hydroxide to obtain a composite flame retardant, the compounded raw materials are accurately fed and proportioned through a feeding system;

[0009] Step 2: mixing the composite elastomer, ultraviolet initiator, crosslinking agent, antioxidant, polyolefin and compounded composite flame retardant as raw materials and then feeding them into a twin-screw extruder;

[0010] Step 3: Extrusion processing, after extrusion plasticization, pre-granulation treatment is performed, and the pellets are heated and plasticized again through a single screw extruder, and then the plasticized raw materials are extruded into a mold to obtain a waterproof base sheet;

[0011] Step 4: Cooling and forming, pulling the obtained sheet into a forming roller for cooling and shaping to obtain a sheet layer, and then coating it with glue after being irradiated with ultraviolet light, wherein the glue is a hot melt adhesive for waterproofing, to obtain a flame retardant polymer self-adhesive waterproof membrane with a sandwich structure of an adhesive layer, a waterproof layer, and an adhesive layer;

[0012] The feeding system in the step 1 process includes: a weighing hopper, a pipeline conveying unit connected to the weighing hopper, and a feeding unit arranged on the pipeline conveying unit:

[0013] The feeding unit comprises: a feeding hopper, a driving mechanism and a blowing mechanism respectively arranged on both sides of the feeding hopper, a rotating roller is rotatably connected in the feeding hopper, and a plurality of material-pickling plates are fixedly arranged on the rotating roller;

[0014] The pipeline conveying unit comprises: a material feeding main pipe, a material control valve arranged at a material outlet at the bottom of the upper hopper, and an air supply pipe obliquely arranged on the material feeding main pipe, wherein the air supply pipe is connected to the upper hopper.

[0015] As a preferred solution of the method for preparing the main body material of the halogen-free flame-retardant polymer waterproof coiled material of the present invention, the driving mechanism comprises: a driving motor located on one side of the upper hopper, a driving gear fixedly arranged on the output end of the driving motor, and a driven gear meshingly connected with the driving gear;

[0016] The rotating roller is rotationally connected to the upper hopper via a hollow shaft, the driven gear is fixedly connected to the hollow shaft, and the air supply pipe is rotationally connected to the hollow shaft.

[0017] As a preferred solution of the method for preparing a halogen-free flame-retardant polymer waterproof roll main material of the present invention, wherein: a reinforcing rib is fixedly connected to the inner side of the rotating roller, an elastic tarpaulin is fixedly connected to the reinforcing rib, and a rubber ring is fixedly connected to the inner center of the elastic tarpaulin.

[0018] As a preferred solution of the method for preparing the main body material of the halogen-free flame-retardant polymer waterproof coiled material of the present invention, wherein: the hollow shaft is fixedly connected to the sleeve shaft through a connecting ring;

[0019] The sleeve shaft comprises: a first straight section, a diameter-reducing section and a second straight section which are integrally formed.

[0020] As a preferred scheme of the method for preparing a halogen-free flame-retardant polymer waterproof roll main material described in the present invention, the blowing mechanism includes: a blower, an air supply pipe rotatably connected to the air supply port of the blower, the air supply pipe is rotatably connected to the upper hopper, the air supply pipe is fixedly connected to the rotating roller, a sliding mechanism is arranged in the air supply pipe, and the sliding mechanism is driven by the airflow to push the rubber ring to slide along the sleeve shaft.

[0021] As a preferred solution of the method for preparing the main material of the halogen-free flame-retardant polymer waterproof membrane described in the present invention, the sliding mechanism includes: a piston slidably connected to the inner side of the air duct, the piston is provided with a vent hole, and a spring is fixedly connected to the end of the air duct, and a plurality of slender rods are also fixedly connected to the piston, and each of the slender rods is connected to a rubber ring through an elastic rod.

[0022] As a preferred scheme of the method for preparing a halogen-free flame-retardant polymer waterproof membrane main body material described in the present invention, wherein: the material stripper plate is hollow, the material stripper plate is located on the outside of the rotating roller and is provided with an air supply net, the material stripper plate is located on the inside of the rotating roller and is provided with an air inlet, and the air inlet is close to one side of the air supply pipe.

[0023] As a preferred solution of the method for preparing a halogen-free flame-retardant polymer waterproof roll main material of the present invention, the feeding units are divided into two groups of arrays distributed on the pipeline conveying unit, and the two groups of feeding units are used to hold modified starch intumescent flame retardant and ultrafine metal hydroxide respectively.

[0024] As a preferred embodiment of the method for preparing the main body material of the halogen-free flame-retardant polymer waterproof coiled material of the present invention, the feeding method of the feeding system in step 1 is:

[0025] S1: Pour different raw materials into different upper hoppers respectively, and then start the blowing mechanism to generate high-pressure airflow;

[0026] S2: The driving motor drives the rotating roller to rotate, so that the material-discharging plate continuously discharges materials, and the material control valve opens at the same time;

[0027] S3: Under the impact of high-pressure airflow, the piston slides inward, pushing the rubber ring to slide inward until it moves to the variable diameter section. At this time, the elastic tarpaulin is like a wind-gathering umbrella, causing the airflow to quickly flow into the other side of the elastic tarpaulin and be introduced into the air supply pipe along the hollow shaft, thereby accelerating the material feeding speed.

[0028] As a preferred embodiment of the method for preparing the main material of the halogen-free flame-retardant polymer waterproof coiled material described in the present invention, when the blowing mechanism is conveying medium and low pressure airflows, the piston has a limited inward sliding distance, that is, it can only slide on the first straight section. At this time, the elastic tarpaulin is like a bowl-shaped windbreak slope, allowing the airflow to enter from the air inlet and blow out from the air supply net. At this time, when the rotating roller rotates, the powdered raw material at the bottom can produce a fluidization effect.

[0029] Beneficial effects of the present invention:

[0030] 1. When the present invention uses the blowing mechanism to convey the medium and low pressure airflow, the piston has a limited sliding distance inward, that is, it can only slide on the first straight section. At this time, the elastic tarpaulin is like a bowl-shaped windbreak slope, allowing the airflow to enter from the air inlet and blow out from the air supply net. At this time, when the rotating roller rotates, the powdered raw materials at the bottom can produce a fluidization effect, thereby avoiding material agglomeration and providing a guarantee for the accurate material feeding ratio;

[0031] 2. By starting the air blowing mechanism to generate high-pressure airflow, the piston slides inward under the impact of the high-pressure airflow, pushing the rubber ring to slide inward, changing the inclined state of the elastic tarpaulin, so that the airflow gathers and flows into the air supply pipe, thereby facilitating the rapid transportation of materials in the feeding main pipe and preventing the raw materials from being blocked in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0033] Figure 1 This is a schematic diagram of the overall structure of a feeding system in a method for preparing a main material of a halogen-free flame-retardant polymer waterproof coiled material proposed by the present invention;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the feeding unit in FIG.

[0035] Figure 3 for Figure 2 Schematic diagram of the internal structure of the middle and upper hopper;

[0036] Figure 4 for Figure 3 Schematic diagram of the internal structure of the rotating roller;

[0037] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0038] Figure 6 for Figure 4 A schematic diagram of the internal structure of the other side of the rotating roller;

[0039] Figure 7 This is a schematic diagram of the airflow state when the material-diverting plate is discharging air;

[0040] Figure 8 This is a schematic diagram of the airflow state when the hollow shaft is discharging air.

[0041] In the figure: 100-feeding unit, 101-feeding hopper, 102-driving mechanism, 102a-driving motor, 102b-driving gear, 102c-driven gear, 102d-hollow shaft, 103-blowing mechanism, 103a-blower, 103b-air delivery pipe, 103c-piston, 103d-spring, 103e-slender rod, 103f-elastic rod, 104-rotating roller, 105-rotating roller, 106-rotating roller, 107-rotating roller, 108-rotating roller, 109-rotating roller, 110-rotating roller, 111-driving gear, 112-driven gear, 113-driven gear, 114-driven gear, 115-driven gear, 116-driven gear, 117-driven gear, 118-driven gear, 119-driven gear, 120-driven gear, 121-driven gear, 122-driven gear, 123-driven gear, 124-driven gear, 125-driven gear, 126-driven gear, 127-driven gear, 128-driven gear, 129-driven gear, 130-driven gear, 131-driven gear, 132-driven gear, 133-driven gear, 134-driven gear, 135-driven gear, 136-driven gear, 137-driven gear, 138-driven gear, 139-driven gear, 140-driven gear, 141-driven gear, 142-driven gear, 143-driven gear, 144-driven gear, 145-driven gear, 146-driven gear, 147-driven gear, 148-driven gear, 149 05-dip plate, 105a-air inlet, 106-air supply net, 107-reinforcement ribs, 108-elastic tarpaulin, 109-sleeve shaft, 109a-first straight section, 109b-reducing section, 109c-second straight section, 110-rubber ring, 111-connecting ring, 200-pipeline conveying unit, 201-feeding main pipe, 202-air supply pipe, 203-material control valve, 300-weighing hopper DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0045] Reference Figure 1-Figure 8 , as an embodiment of the present invention, provides a method for preparing a main body material of a halogen-free flame-retardant polymer waterproofing coiled material, the method comprising the following steps:

[0046] Step 1: flame retardant compounding, using modified starch as the carbon source of the intumescent flame retardant and ultra-fine metal hydroxide to obtain a composite flame retardant, the compounded raw materials are accurately fed and proportioned through a feeding system;

[0047] Specifically, the feeding method of the feeding system is:

[0048] S1: Pour different raw materials into different upper hoppers 101 respectively, and then start the blowing mechanism 103 to generate high-pressure airflow;

[0049] S2: The rotating roller 104 is driven to rotate by the driving motor 102a, so that the material-diverting plate 105 continuously diverts the material, and the material control valve 203 is opened at the same time;

[0050] S3: Under the impact of high-pressure airflow, the piston 103c slides inward, pushing the rubber ring 110 to slide inward until it moves to the variable diameter section 109b. At this time, the elastic tarpaulin 108 is like a wind-gathering umbrella, allowing the airflow to quickly flow into the other side of the elastic tarpaulin 108 and be introduced into the air supply pipe 202 along the hollow shaft 102d, thereby accelerating the material feeding speed.

[0051] It should be particularly noted that when the blowing mechanism 103 is delivering medium and low pressure airflow, the piston 103c has a limited inward sliding distance, that is, it can only slide on the first straight section 109a. At this time, the elastic tarpaulin 108 is like a bowl-shaped windbreak, allowing the airflow to enter from the air inlet 105a and be blown out from the air supply net 106. At this time, the rotating roller 104 can produce a fluidization effect on the powdered raw material at the bottom when it rotates.

[0052] Step 2: mixing the composite elastomer, ultraviolet initiator, crosslinking agent, antioxidant, polyolefin and compounded composite flame retardant as raw materials and then feeding them into a twin-screw extruder;

[0053] Step 3: Extrusion processing, after extrusion plasticization, pre-granulation treatment is performed, and the pellets are heated and plasticized again through a single screw extruder, and then the plasticized raw materials are extruded into a mold to obtain a waterproof base sheet;

[0054] Step 4: Cooling and forming, pulling the obtained sheet into a forming roller for cooling and shaping to obtain a sheet layer, and then coating it with glue after being irradiated with ultraviolet light, wherein the glue is a hot melt adhesive for waterproofing, to obtain a flame retardant polymer self-adhesive waterproof membrane with a sandwich structure of an adhesive layer, a waterproof layer, and an adhesive layer;

[0055] The feeding system in step one includes: a weighing hopper 300, a pipeline conveying unit 200 connected to the weighing hopper 300, and a feeding unit 100 arranged on the pipeline conveying unit 200. The feeding unit 100 is divided into two groups of arrays distributed on the pipeline conveying unit 200. The two groups of feeding units 100 are used to hold the modified starch intumescent flame retardant and the ultrafine metal hydroxide, respectively.

[0056] The feeding unit 100 includes: a feeding hopper 101, a driving mechanism 102 and a blasting mechanism 103 respectively arranged on both sides of the feeding hopper 101, a rotating roller 104 is rotatably connected in the feeding hopper 101, a plurality of material-dispensing plates 105 are fixedly arranged on the rotating roller 104, a reinforcing rib 107 is fixedly connected to the inner side of the rotating roller 104, an elastic tarpaulin 108 is fixedly connected to the reinforcing rib 107, a rubber ring 110 is fixedly connected to the inner center of the elastic tarpaulin 108, an elastic connecting rib is arranged between the elastic tarpaulin 110 and the rubber ring 110, and the slope of the elastic tarpaulin 108 is different when the rubber ring 110 is in different positions, refer to Figure 7-8 The elastic tarpaulins 108 with different slopes can both block the wind and gather the wind.

[0057] Specifically, the driving mechanism 102 includes: a driving motor 102a located at one side of the upper hopper 101, a driving gear 102b fixedly arranged on the output end of the driving motor 102a, and a driven gear 102c meshingly connected with the driving gear 102b;

[0058] The rotating roller 104 is rotatably connected to the upper hopper 101 through the hollow shaft 102d, the driven gear 102c is fixedly connected to the hollow shaft 102d, and the air supply pipe 202 is rotatably connected to the hollow shaft 102d. By starting the driving motor 102a, the internal rotating roller 104 is driven to rotate under the meshing of the driving gear 102b and the driven gear 102c to control the transportation of the raw materials. The hollow shaft 102d is fixedly connected to the sleeve shaft 109 through the connecting ring 111. The sleeve shaft 109 includes: an integrally formed first straight section 109a, a variable diameter section 109b and a second straight section 109c. When the rubber ring 110 slides on the first straight section 109a, the elastic tarpaulin 108 always maintains a wind-blocking effect, and when the rubber ring 110 moves to the position of the variable diameter section 109b, the elastic tarpaulin 108 presents a wind-gathering effect.

[0059] The pipeline transportation unit 200 includes: a material feeding main pipe 201 , a material control valve 203 arranged at the bottom discharge port of the upper hopper 101 , and an air supply pipe 202 obliquely arranged on the material feeding main pipe 201 , and the air supply pipe 202 is connected to the upper hopper 101 .

[0060] The air blowing mechanism 103 includes: a blower 103a, an air delivery pipe 103b rotatably connected to the air delivery port of the blower 103a, the air delivery pipe 103b is rotatably connected to the upper hopper 101, the air delivery pipe 103b is fixedly connected to the rotating roller 104, a sliding mechanism is arranged inside the air delivery pipe 103b, and the sliding mechanism is driven by the airflow to push the rubber ring 110 to slide along the sleeve shaft 109, and the sliding mechanism includes: a piston 103c slidably connected to the inner side of the air delivery pipe 103b, a vent hole is provided on the piston 103c, and a spring 103d is fixedly connected to the end of the air delivery pipe 103b, and a plurality of slender rods 103e are also fixedly connected to the piston 103c, and each slender rod 103e is connected to the rubber ring 110 through an elastic rod 103f. The position of the piston 103c is changed by different degrees of airflow, thereby changing the position of the rubber ring 110.

[0061] The material-diverting plate 105 is hollow, and an air supply net 106 is arranged on the outside of the rotating roller 104. The material-diverting plate 105 is arranged on the inside of the rotating roller 104 with an air inlet 105a, and the air inlet 105a is close to the side of the air delivery pipe 103b. When the elastic tarpaulin 108 is in a wind-blocking state, most of the airflow is turned back and enters from the air inlet 105a, and then blown out from the air supply net 106, so that the powdery material at the bottom has a fluidization effect, preventing the agglomeration of objects, and better feeding.

[0062] In summary, the present invention changes the inward sliding distance of the piston 103c when the blowing mechanism 103 delivers airflows of different intensities. The piston 103c slides on the first straight section 109a. At this time, the elastic tarpaulin 108 is like a bowl-shaped windbreak slope, allowing the airflow to enter from the air inlet 105a, which can allow the powdered raw materials at the bottom to produce a fluidization effect, thereby avoiding material agglomeration and providing a guarantee for the accurate feeding ratio of the materials. The piston 103c slides inward until it moves to the variable diameter section 109b. The elastic tarpaulin 108 is like a wind-gathering umbrella, causing the airflow to gather and flow into the air supply pipe 202, thereby facilitating the rapid transportation of materials in the feeding main pipe 201 and preventing the raw materials from being blocked in the pipeline.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for preparing a main body material of a halogen-free flame-retardant polymer waterproof coiled material, characterized in that: The method comprises the following steps: Step 1: flame retardant compounding, using modified starch as the carbon source of the intumescent flame retardant and ultra-fine metal hydroxide to obtain a composite flame retardant, the compounded raw materials are accurately fed and proportioned through a feeding system; Step 2: mixing the composite elastomer, ultraviolet light initiator, crosslinking agent, antioxidant, polyolefin and compounded composite flame retardant as raw materials and then feeding them into a twin-screw extruder; Step 3: Extrusion processing, after extrusion plasticization, pre-granulation treatment is performed, and the pellets are heated and plasticized again through a single screw extruder, and then the plasticized raw materials are extruded into a mold to obtain a waterproof base sheet; Step 4: Cooling and forming, pulling the obtained sheet into a forming roller for cooling and shaping to obtain a sheet layer, and then coating it with glue after being irradiated with ultraviolet light, wherein the glue is a hot melt adhesive for waterproofing, to obtain a flame retardant polymer self-adhesive waterproof membrane with a sandwich structure of an adhesive layer, a waterproof layer, and an adhesive layer; The feeding system in the step 1 process comprises: a weighing hopper (300), a pipeline conveying unit (200) connected to the weighing hopper (300), and a feeding unit (100) arranged on the pipeline conveying unit (200): The feeding unit (100) comprises: a feeding hopper (101), a driving mechanism (102) and a blowing mechanism (103) respectively arranged on both sides of the feeding hopper (101); a rotating roller (104) is rotatably connected in the feeding hopper (101), and a plurality of material-pickling plates (105) are fixedly arranged on the rotating roller (104); The pipeline conveying unit (200) comprises: a material feeding main pipe (201), a material control valve (203) arranged at a material outlet at the bottom of the material feeding hopper (101), and an air supply pipe (202) obliquely arranged on the material feeding main pipe (201), wherein the air supply pipe (202) is connected to the material feeding hopper (101).

2. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 1, characterized in that: The driving mechanism (102) comprises: a driving motor (102a) located at one side of the upper hopper (101), a driving gear (102b) fixedly arranged on the output end of the driving motor (102a), and a driven gear (102c) meshingly connected with the driving gear (102b); The rotating roller (104) is rotationally connected to the upper hopper (101) via a hollow shaft (102d), the driven gear (102c) is fixedly connected to the hollow shaft (102d), and the air supply pipe (202) is rotationally connected to the hollow shaft (102d).

3. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 2, characterized in that: A reinforcing rib (107) is fixedly connected to the inner side of the rotating roller (104), an elastic tarpaulin (108) is fixedly connected to the reinforcing rib (107), and a rubber ring (110) is fixedly connected to the inner center of the elastic tarpaulin (108).

4. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 3, characterized in that: The hollow shaft (102d) is fixedly connected to the sleeve shaft (109) via a connecting ring (111); The sleeve shaft (109) comprises: an integrally formed first straight section (109a), a diameter-reducing section (109b), and a second straight section (109c).

5. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 4, characterized in that: The air blowing mechanism (103) comprises: a blower (103a), an air delivery pipe (103b) rotatably connected to an air delivery port of the blower (103a), the air delivery pipe (103b) being rotatably connected to an upper hopper (101), the air delivery pipe (103b) being fixedly connected to a rotating roller (104), a sliding mechanism being arranged in the air delivery pipe (103b), and the sliding mechanism being driven by airflow to push the rubber ring (110) to slide along the sleeve shaft (109).

6. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 5, characterized in that: The sliding mechanism comprises: a piston (103c) slidably connected to the inner side of an air supply pipe (103b); a vent hole is provided on the piston (103c); and a spring (103d) is fixedly connected to the end of the air supply pipe (103b); and a plurality of slender rods (103e) are also fixedly connected to the piston (103c); each of the slender rods (103e) is connected to a rubber ring (110) via an elastic rod (103f).

7. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 6, characterized in that: The material-diverting plate (105) is hollow, and is provided with an air supply net (106) on the outside of the rotating roller (104). The material-diverting plate (105) is provided with an air inlet (105a) on the inside of the rotating roller (104), and the air inlet (105a) is close to one side of the air supply pipe (103b).

8. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 1, characterized in that: The feeding units (100) are divided into two groups of arrays distributed on the pipeline conveying unit (200), and the two groups of feeding units (100) are used to contain the modified starch intumescent flame retardant and the ultrafine metal hydroxide respectively.

9. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 8, characterized in that: The feeding method of the feeding system in step 1 is: S1: pouring different raw materials into different upper hoppers (101) respectively, and then starting the blowing mechanism (103) to generate high-pressure airflow; S2: The rotating roller (104) is driven to rotate by the driving motor (102a), so that the material-dispensing plate (105) continuously dispenses materials, and the material control valve (203) is opened at the same time; S3: Under the impact of the high-pressure airflow, the piston (103c) slides inward, pushing the rubber ring (110) to slide inward until it moves to the variable diameter section (109b). At this time, the elastic tarpaulin (108) is like a wind-gathering umbrella, allowing the airflow to quickly flow into the other side of the elastic tarpaulin (108) and be introduced into the air supply pipe (202) along the hollow shaft (102d), thereby accelerating the material feeding speed.

10. The method for preparing a halogen-free flame-retardant polymer waterproofing coiled material according to claim 9, characterized in that: When the blowing mechanism (103) is delivering medium and low pressure airflow, the piston (103c) has a limited inward sliding distance, that is, it can only slide on the first straight section (109a). At this time, the elastic tarpaulin (108) is like a bowl-shaped windbreak slope, allowing the airflow to enter from the air inlet (105a) and be blown out from the air supply net (106). At this time, the rotating roller (104) can produce a fluidization effect on the powdered raw material at the bottom when it rotates.

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