CN111548641A

CN111548641A - High-flame-retardancy plastic hollow floor and production process thereof

Info

Publication number: CN111548641A
Application number: CN202010437827.4A
Authority: CN
Inventors: 苏宇堃; 张润涵; 苏伟; 苏建设
Original assignee: Jieshou Yaxin Plastic Technology Co ltd
Current assignee: Jieshou Yaxin Plastic Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-18

Abstract

The invention discloses a high flame-retardant plastic hollow floor and a production process thereof, wherein the production process comprises the steps of firstly treating a wood fiber material by a flame retardant, and then uniformly mixing the wood fiber material with thermoplastic plastics, a lubricant, a coupling agent and an antioxidant, so that the plastic hollow floor not only has the advantages of environmental protection and moisture resistance of a common plastic floor, but also has excellent flame retardant property; the production process prepares the mixture by using the high-efficiency mixing equipment, and the high-efficiency mixing equipment simultaneously prepares the flame-retardant treated wood fiber material and the premix, so that a production mode that the flame-retardant treated wood fiber material is firstly prepared, then the premix is prepared and finally the wood fiber material and the premix are mixed in the prior art is replaced, the production efficiency is greatly improved, and the production cost is reduced; this high-efficient mixing apparatus passes through quartic mixing treatment for the mixture of production mixes effectually, and the homogeneity has further improved this plastics cavity floor dampproofing and fire behaviour.

Description

High-flame-retardancy plastic hollow floor and production process thereof

Technical Field

The invention relates to the field of plastic floors, in particular to a plastic hollow floor with high flame retardance and a production process thereof.

Background

The existing floor is generally made of wood, and the floor block made of the wood floor has the defects of consuming a lot of limited forest resources, being incapable of preventing fire and retarding flame and being easy to deform due to moisture.

Thus, patent application No. CN99101688.2 discloses a composite plastic flame-retardant floor block, which is composed of a surface decorative layer composed of polyvinyl chloride resin, di-salt, tri-salt, foaming agent, vinyl acetate copolymer, chlorinated polyethylene, light calcium carbonate, and stearic acid, and a skeleton base layer composed of the above components and fly ash. The composite plastic flame-retardant floor block has the performances of mould resistance, fire resistance, static resistance, wear resistance, moisture resistance and drying resistance, also has the advantages of aromatic smell and good decoration, and can save limited forest resources. The following disadvantages still exist: (1) the composite plastic flame-retardant floor block has certain flame-retardant performance, but the flame-retardant performance of the floor is still not excellent enough, so that potential safety hazards exist; (2) the production method of the plastic flame-retardant floor in the prior art comprises the steps of firstly preparing a wood fiber material subjected to flame-retardant treatment by using mixing equipment, then preparing a premix by using the mixing equipment, and finally mixing the wood fiber material and the premix, so that the production efficiency is low, and the production cost is high; (3) the existing mixing equipment is based on simple stirring treatment, a good mixing effect cannot be achieved, and the produced plastic flame-retardant floor is low in quality.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a plastic hollow floor with high flame retardance and a production process thereof, wherein the plastic hollow floor comprises the following steps: (1) the wood fiber material is treated by the flame retardant, so that the wood fiber material and the flame retardant are fully mixed and then uniformly mixed with the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant, so that the plastic hollow floor not only has the advantages of environmental protection and moisture resistance of a common plastic floor, but also has excellent flame retardant property, due to the catalytic carbonization effect of the water-soluble flame retardant on the wood fiber, the wood fiber carbonized in advance can delay and inhibit the thermal decomposition of a thermoplastic plastic matrix, and further the flame retardant effect on the hollow wood-plastic floor is realized, and the wood-plastic hollow floor has the advantages of small addition amount of the flame retardant and high flame retardant efficiency, and solves the problems that the existing plastic flame retardant floor has certain flame retardant property, but the flame retardant property is still not excellent enough and has potential safety hazard; (2) the method comprises the steps of putting the wood fiber material into a first premixing tank from a first feeding hole, uniformly spraying the saturated aqueous solution of the flame retardant on the surface of the wood fiber material, uniformly mixing the saturated aqueous solution of the flame retardant and the wood fiber material by a rotating first stirring blade to obtain the wood fiber material subjected to flame retardant treatment, putting thermoplastic plastic, a lubricant, a coupling agent and an antioxidant into a second premixing tank from a second feeding hole, uniformly mixing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant by the rotating first stirring blade to obtain a premix, and solves the problems that the existing plastic flame retardant floor is produced by firstly preparing the wood fiber material subjected to flame retardant treatment by mixing equipment, then preparing the premix by mixing equipment, and finally mixing the wood fiber material and the lubricant, so that the production efficiency is low, the production cost is high; (3) the method comprises the steps of uniformly mixing a saturated aqueous solution of a flame retardant and a wood fiber material in a first premixing tank to obtain a wood fiber material subjected to flame retardant treatment, uniformly mixing thermoplastic plastics, a lubricant, a coupling agent and an antioxidant in a second premixing tank to obtain a premix, allowing the wood fiber material subjected to flame retardant treatment to fall into a first conveying pipeline through a first discharge pipe, shearing through a conveying screw and a spiral shearing blade and conveying the wood fiber material to a mixing hopper from a first switching port, allowing the premix to fall into a second conveying pipeline through a second discharge pipe, shearing through the conveying screw and the spiral shearing blade and conveying the wood fiber material subjected to flame retardant treatment to the mixing hopper from a second switching port, allowing the wood fiber material subjected to flame retardant treatment and the premix to jointly enter into a mixing tank through the bottom of the mixing hopper, and driving a second stirring blade to rotate through a driving belt pulley and a driven belt pulley by a stirring motor, after the wood fiber material and the premix of rotatory second stirring leaf with flame retardant treatment stir evenly, obtain the primary mixture, the stirring is mixed, the primary mixture is carried to the storage hopper through the third discharging pipe, then fall into the third pipeline, conveying screw and spiral shearing leaf will be sheared the primary mixture and arrange the material pipe discharge from the third, obtain the mixture, solved current mixing apparatus and handled based on simple stirring, can not reach fine mixed effect, the problem that the fire-retardant floor of plastics of production is low in quality.

The purpose of the invention can be realized by the following technical scheme:

a high-flame-retardancy plastic hollow floor comprises the following components in parts by weight: 50-70 parts of flame-retardant treated wood fiber material, 30-50 parts of thermoplastic plastic, 0.5-3 parts of lubricant, 2-8 parts of coupling agent and 0.5-5 parts of antioxidant;

the high-flame-retardancy plastic hollow floor is prepared by the following steps:

step one, preparing a wood fiber material subjected to flame retardant treatment:

s1, uniformly mixing the flame retardant with water to obtain a saturated aqueous solution of the flame retardant;

s2, placing the wood fiber material in high-efficiency mixing equipment, uniformly spraying a saturated aqueous solution of a flame retardant on the surface of the wood fiber material in a mass ratio of 1:5 in the mixing process, and mixing for 10-20 min to obtain the wood fiber material subjected to flame retardant treatment;

step two, preparing premix: placing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant into high-efficiency mixing equipment, and mixing for 10-20 min to obtain a premix;

step three, preparing a mixture: mixing the wood fiber material subjected to flame retardant treatment and the premix for 10-20 min at the temperature of 60-110 ℃, and discharging the mixture through high-efficiency mixing equipment to obtain a mixture;

step four, preparing the plastic hollow floor with high flame retardance: and (3) placing the mixture into a conical co-rotating double-screw extruder with a barrel temperature of 130-170 ℃, a neck mold temperature of 165-175 ℃ and a screw rotating speed of 50-60 r/min for extrusion molding to obtain the high-flame-retardancy plastic hollow floor.

As a further scheme of the invention: the thermoplastic plastic is one or a mixture of two of polyethylene and polypropylene; the lubricant is one or a mixture of two of maleic anhydride grafted polyethylene wax and maleic anhydride grafted polypropylene wax; the coupling agent is one or a mixture of more of organic siloxane, silane coupling agent and graft modified polymer; the antioxidant is one or a mixture of several of antioxidant 1010, 2, 6-di-tert-butyl-4-methylphenol and tris (2, 4-di-tert-butylphenyl) phosphite.

As a further scheme of the invention: the flame retardant in the first step S1 is a mixture of ammonium polyphosphate with low polymerization degree, guanidine sulfamate and sodium octaborate, wherein the mass ratio of the ammonium polyphosphate to the guanidine sulfamate to the sodium octaborate is 2:1:1, and the polymerization degree of the ammonium polyphosphate is less than 50.

As a further scheme of the invention: the wood fiber material in the step I2 is one or a mixture of more of wood powder, bamboo powder, straw powder, rice hull powder, fruit hull powder and hemp fiber, and the particle mesh number of the wood fiber material is 40-300 meshes.

As a further scheme of the invention: a production process of a plastic hollow floor with high flame retardance comprises the following steps:

s2, putting the wood fiber material into a first premixing tank from a first feeding hole prepared by high-efficiency mixing equipment, uniformly spraying a saturated aqueous solution of a flame retardant on the surface of the wood fiber material in a mass ratio of 1:5, and mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min to obtain the wood fiber material subjected to flame retardant treatment;

step two, preparing premix:

putting the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant into a second premixing tank from a second feeding port prepared by high-efficiency mixing equipment, and mixing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant for 10-20 min to obtain a premix;

step three, preparing a mixture:

t1, enabling the flame-retardant treated wood fiber material to fall into a first conveying pipeline through a first discharge pipe, shearing the wood fiber material through a conveying screw and a spiral shearing blade in the first conveying pipeline, and conveying the wood fiber material into a mixing hopper;

t2, enabling the premix to fall into a second conveying pipeline through a second discharge pipe, shearing through a conveying screw and a spiral shearing blade in the second conveying pipeline, and conveying the premix into a mixing hopper;

t3, feeding the flame-retardant wood fiber material and the premix into a mixing tank through the bottom of a mixing hopper, stirring the flame-retardant wood fiber material and the premix for 10-20 min by a rotating second stirring blade at the temperature of 60-110 ℃, and uniformly stirring to obtain a primary mixture;

t4, conveying the primary mixture into a storage hopper through a third discharge pipe, then dropping into a third conveying pipeline, shearing the primary mixture through a conveying screw and a spiral shearing blade in the third conveying pipeline, and discharging the primary mixture from a third discharge pipe to obtain a mixture;

step four, preparing the plastic hollow floor with high flame retardance:

and (3) placing the mixture into a conical co-rotating double-screw extruder with a barrel temperature of 130-170 ℃, a neck mold temperature of 165-175 ℃ and a screw rotating speed of 50-60 r/min for extrusion molding to obtain the high-flame-retardancy plastic hollow floor.

As a further scheme of the invention: the working process of preparing the mixture by the high-efficiency mixing equipment is as follows:

the method comprises the following steps: starting a first premixing motor and a second premixing motor, wherein the first premixing motor and the second premixing motor operate to respectively drive first stirring blades in inner cavities of a first premixing tank and a second premixing tank to rotate through rotating shafts;

step two: putting the wood fiber material into a first premixing tank from a first feeding hole, uniformly spraying the saturated aqueous solution of the flame retardant on the surface of the wood fiber material, mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min by a rotating first stirring blade, and uniformly mixing to obtain the wood fiber material subjected to flame retardant treatment;

putting the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant into a second premixing tank from a second feeding hole, mixing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant for 10-20 min by a rotating first stirring blade, and uniformly mixing to obtain a premix;

step three: starting a first conveying motor and a second conveying motor, wherein the first conveying motor operates to drive a conveying screw and a spiral shearing blade in a first conveying pipeline to rotate, and the second conveying motor operates to drive the conveying screw and the spiral shearing blade in a second conveying pipeline to rotate;

step four: the wood fiber material subjected to flame retardant treatment falls into a first conveying pipeline through a first discharge pipe, is sheared through a conveying screw and a spiral shearing blade and is conveyed into a mixing hopper from a first transfer port, the premix falls into a second conveying pipeline through a second discharge pipe, is sheared through the conveying screw and the spiral shearing blade and is conveyed into the mixing hopper from a second transfer port, and the wood fiber material subjected to flame retardant treatment and the premix enter a mixing tank together through the bottom of the mixing hopper;

step five: starting a stirring motor, wherein the stirring motor operates to drive a second stirring blade to rotate through a driving belt pulley and a driven belt pulley, the rotating second stirring blade is used for stirring the wood fiber material subjected to flame retardant treatment and the premix for 10-20 min at the temperature of 60-110 ℃, and a primary mixture is obtained after uniform stirring;

step six: starting a stretching cylinder, wherein the stretching cylinder contracts to pull a striker plate to move out of a third discharge pipe, and a primary mixture is conveyed to a storage hopper through the third discharge pipe and then falls into a third conveying pipeline;

step seven: and starting the third conveying motor, driving the conveying screw and the spiral shearing blade in the third conveying pipeline to rotate by the third conveying motor, shearing the primary mixture by the conveying screw and the spiral shearing blade, and discharging the primary mixture from the third discharge pipe to obtain the mixture.

The invention has the beneficial effects that:

(1) according to the production process of the high-flame-retardance plastic hollow floor, the wood fiber material is subjected to flame retardant treatment, so that the wood fiber material and the flame retardant are fully mixed and then uniformly mixed with the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant, the plastic hollow floor not only has the advantages of environmental protection and moisture resistance of a common plastic floor, but also has excellent flame retardance, due to the catalytic carbonization effect of the water-soluble flame retardant on the wood fiber, the wood fiber carbonized in advance can delay and inhibit the thermal decomposition of a thermoplastic plastic matrix, so that the flame retardance on the hollow wood-plastic floor is realized, and the production process has the advantages of less flame retardant addition amount and high flame retardance efficiency;

the flame retardance of the plastic hollow floor is detected according to a detection method of national standard (GB8624-97), and the detection result is as follows: flame retardant grade B1-A;

(2) the invention relates to a production process of a high-flame-retardancy plastic hollow floor, which comprises the steps of preparing a mixed material by using a high-efficiency mixing device, extruding and molding the mixed material to obtain the plastic hollow floor, wherein the high-efficiency mixing device comprises a first premixing motor and a second premixing motor which are operated through a rotating shaft to respectively drive a first stirring blade in inner cavities of the first premixing tank and the second premixing tank to rotate, putting a wood fiber material into the first premixing tank from a first feeding hole, uniformly spraying a saturated aqueous solution of a flame retardant on the surface of the wood fiber material, uniformly mixing the saturated aqueous solution of the flame retardant and the wood fiber material by the rotating first stirring blade to obtain a flame-retardant wood fiber material, putting thermoplastic plastics, a lubricant, a coupling agent and an antioxidant into the second feeding hole, uniformly mixing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant by using a rotating first stirring blade to obtain a premix; the efficient mixing equipment replaces the production mode that the flame-retardant treated wood fiber material is firstly prepared by the mixing equipment, then the premix is prepared by the mixing equipment and finally the flame-retardant treated wood fiber material and the premix are mixed in the prior art, so that the production efficiency is greatly improved and the production cost is reduced;

(3) according to the efficient mixing equipment, the wood fiber material subjected to flame retardant treatment is obtained by uniformly mixing the saturated aqueous solution of the flame retardant and the wood fiber material in the first premixing tank, the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant are uniformly mixed in the second premixing tank to obtain the premix, and the premix is stirred and mixed, namely, the first mixing treatment is carried out;

the method comprises the following steps that wood fiber materials subjected to flame retardant treatment fall into a first conveying pipeline through a first discharge pipe, are sheared through a conveying screw and spiral shearing blades and are conveyed into a mixing hopper from a first transfer port, and the premix falls into a second conveying pipeline through a second discharge pipe, is sheared through the conveying screw and the spiral shearing blades and is conveyed into the mixing hopper from a second transfer port, and is sheared and mixed, namely, the second mixing treatment is carried out;

the wood fiber material subjected to flame retardant treatment and the premix enter a mixing tank together through the bottom of a mixing hopper, a stirring motor operates to drive a second stirring blade to rotate through a driving belt pulley and a driven belt pulley, the rotating second stirring blade uniformly stirs the wood fiber material subjected to flame retardant treatment and the premix to obtain a primary mixture, and the primary mixture is stirred and mixed, namely, the primary mixture is mixed for the third mixing treatment;

conveying the primary mixture into a storage hopper through a third discharge pipe, then dropping the primary mixture into a third conveying pipeline, shearing the primary mixture by a conveying screw and a spiral shearing blade and discharging the primary mixture from a third discharge pipe to obtain a mixture, and shearing and mixing the mixture, namely performing fourth mixing treatment;

this high-efficient mixing apparatus passes through quartic mixing treatment for the mixture of production mixes effectually, and the homogeneity has further improved this plastics cavity floor dampproofing and fire behaviour.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the construction of a high efficiency mixing apparatus of the present invention;

fig. 2 is a schematic view of the internal structure of the first premix tank in the present invention;

FIG. 3 is a schematic structural view of a first premix tank according to the present invention;

FIG. 4 is a schematic structural view of a mixing hopper and a mixing tank of the present invention;

FIG. 5 is a front view of the mixing hopper and mixing tank of the present invention;

FIG. 6 is a view showing the connection between the driven pulley and the second agitating blade in the present invention;

FIG. 7 is a schematic view of the structure of a storage hopper and a third pipeline in the present invention;

fig. 8 is a schematic view of the internal structure of a third transfer pipe in the present invention.

In the figure: 101. a first mounting bracket; 102. a second mounting bracket; 103. a first premixing tank; 104. a second premixing tank; 105. a first feed port; 106. a second feed port; 107. a first pre-mix motor; 108. a second premix motor; 109. a first delivery conduit; 110. a second delivery conduit; 111. a mixing hopper; 112. a third mounting bracket; 113. a mixing tank; 114. a storage hopper; 115. a third delivery conduit; 116. a first discharge pipe; 117. a second discharge pipe; 118. a first conveying motor; 119. a second conveying motor; 120. a first discharging pipe; 121. a second discharge pipe; 122. a first stirring blade; 123. a first transfer port; 124. a second transfer material port; 125. stretching the cylinder; 126. a striker plate; 127. a third discharge pipe; 128. a third discharge pipe; 129. a first support frame; 130. a third conveying motor; 131. a second support frame; 132. a third support frame; 133. a stirring motor; 134. a drive pulley; 135. a driven pulley; 136. a second stirring blade; 137. a conveying screw; 138. and (4) spirally shearing the leaves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 8, the present embodiment is a plastic hollow floor with high flame retardancy, which comprises the following components in parts by weight: 50 parts of flame-retardant treated wood fiber material, 30 parts of thermoplastic plastic, 0.5 part of lubricant, 2 parts of coupling agent and 0.5 part of antioxidant;

The thermoplastic is polyethylene; the lubricant is maleic anhydride grafted polyethylene wax; the coupling agent is organic siloxane; the antioxidant is antioxidant 1010.

The flame retardant in the first step S1 is a mixture of ammonium polyphosphate with a low degree of polymerization, guanidine sulfamate, and sodium octaborate with a polymerization degree of less than 50 in a mass ratio of 2:1: 1.

The wood fiber material in the step I2 is a mixture of several of wood powder, bamboo powder, straw powder, rice hull powder, fruit hull powder and hemp fiber, and the particle mesh number of the wood fiber material is 40 meshes.

A production process of a plastic hollow floor with high flame retardance comprises the following steps:

s2, putting the wood fiber material into a first premixing tank 103 from a first feeding hole 105 prepared by high-efficiency mixing equipment, uniformly spraying a saturated aqueous solution of a flame retardant on the surface of the wood fiber material in a mass ratio of 1:5, and mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min to obtain the wood fiber material subjected to flame retardant treatment;

step two, preparing premix:

the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant are put into a second premixing tank 104 from a second feeding hole 106 prepared by high-efficiency mixing equipment, and the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant are mixed for 10-20 min to obtain a premix;

step three, preparing a mixture:

t1, the wood fiber material subjected to flame retardant treatment falls into the first conveying pipeline 109 through the first discharge pipe 116, and is sheared and conveyed into the mixing hopper 111 through the conveying screw 137 and the spiral shearing blade 138 inside the first conveying pipeline 109;

t2, the premix falls into the second conveying pipeline 110 through the second discharge pipe 117, and is sheared and conveyed into the mixing hopper 111 through the conveying screw 137 and the spiral shearing blade 138 inside the second conveying pipeline 110;

t3, the wood fiber material subjected to flame retardant treatment and the premix enter a mixing tank 113 through the bottom of a mixing hopper 111, the wood fiber material subjected to flame retardant treatment and the premix are stirred for 10min to 20min by a rotating second stirring blade 136 at the temperature of 60 ℃ to 110 ℃, and a primary mixture is obtained after uniform stirring;

t4, conveying the primary mixture into a storage hopper 114 through a third discharge pipe 127, then dropping into a third conveying pipeline 115, shearing the primary mixture through a conveying screw 137 and a spiral shearing blade 138 inside the third conveying pipeline 115, and discharging the primary mixture from a third discharging pipe 128 to obtain a mixture;

step four, preparing the plastic hollow floor with high flame retardance:

The flame retardancy of the plastic hollow floor of example 1 was measured, and the measurement results were as follows: flame retardant grade B1 grade;

example 2:

referring to fig. 1 to 8, the present embodiment is a plastic hollow floor with high flame retardancy, which comprises the following components in parts by weight: 70 parts of flame-retardant wood fiber material, 50 parts of thermoplastic plastic, 3 parts of lubricant, 8 parts of coupling agent and 5 parts of antioxidant;

The thermoplastic plastic is a mixture of polyethylene and polypropylene; the lubricant is a mixture of maleic anhydride grafted polyethylene wax and maleic anhydride grafted polypropylene wax; the coupling agent is a mixture of organic siloxane, silane coupling agent and graft modified polymer; the antioxidant is a mixture of antioxidant 1010, 2, 6-di-tert-butyl-4-methylphenol and tris (2, 4-di-tert-butylphenyl) phosphite.

The wood fiber material in the step I2 is a mixture of several of wood powder, bamboo powder, straw powder, rice hull powder, fruit hull powder and hemp fiber, and the particle mesh number of the wood fiber material is 300 meshes.

step two, preparing premix:

step three, preparing a mixture:

step four, preparing the plastic hollow floor with high flame retardance:

The flame retardancy of the plastic hollow floor of example 2 was tested, and the test results were as follows: flame retardant grade a;

example 3:

referring to fig. 1 to 8, the high-efficiency mixing apparatus in the present embodiment includes a first premixing tank 103, a second premixing tank 104, and a mixing tank 113;

the first premixing tank 103 is mounted at the top of the first mounting frame 101, a first feed inlet 105 is mounted on one side of the top of the first premixing tank 103, a first premixing motor 107 is mounted at the center of the top of the first premixing tank 103, a first discharge pipe 116 is mounted at the bottom of the first premixing tank 103, the bottom end of the first discharge pipe 116 is communicated with the top of one end of a first conveying pipeline 109, the first conveying pipeline 109 is obliquely mounted, one end of the first conveying pipeline 109, which is close to the first discharge pipe 116, is connected with a first conveying motor 118, and a first discharge pipe 120 is mounted at the bottom of one end of the first conveying pipeline 109, which is far away from the first conveying motor 118;

the second premixing tank 104 is mounted at the top of the second mounting frame 102, a second feed inlet 106 is mounted on one side of the top of the second premixing tank 104, a second premixing motor 108 is mounted at the center of the top of the second premixing tank 104, a second discharge pipe 117 is mounted at the bottom of the second premixing tank 104, the bottom end of the second discharge pipe 117 is communicated with the top of one end of a second conveying pipeline 110, the second conveying pipeline 110 is mounted in an inclined manner, one end, close to the second discharge pipe 117, of the second conveying pipeline 110 is connected with a second conveying motor 119, and a second discharge pipe 121 is mounted at the bottom of one end, far away from the second conveying motor 119, of the second conveying pipeline 110;

a plurality of first stirring blades 122 are arranged in the inner cavities of the first premixing tank 103 and the second premixing tank 104, and the first stirring blades 122 in the inner cavities of the first premixing tank 103 and the second premixing tank 104 are respectively connected to the output shafts of the first premixing motor 107 and the second premixing motor 108 through rotating shafts;

the utility model discloses a material mixing device, including mixing tank 113, mixing tank 111, first material discharge pipe 120, second material discharge pipe 121, second material discharge pipe 120, second material discharge pipe 121, second material discharge pipe 131, third material discharge pipe 132, agitator motor 133, drive pulley 134 cup joints on the output shaft of agitator motor 133, drive pulley 134 is connected with driven pulley 135 through the belt, driven pulley 135 runs through mixing tank 113 bottom through the pivot and is connected with second stirring leaf 136, a third discharge pipe 127 is installed at the bottom of one side, away from the stirring motor 133, of the mixing tank 113, a stretching cylinder 125 is installed right above the third discharge pipe 127 of the mixing tank 113, a striker plate 126 is installed on a movable rod of the stretching cylinder 125, and the striker plate 126 penetrates through the third discharge pipe 127;

one end, far away from the mixing tank 113, of the third discharge pipe 127 is communicated to the top of one side of the storage hopper 114, the bottom of the storage hopper 114 is connected to the top of one end of a third conveying pipeline 115, one end, near the storage hopper 114, of the third conveying pipeline 115 is connected with a third conveying motor 130, the bottom of one end, far away from the third conveying motor 130, of the third conveying pipeline 115 is provided with a third discharge pipe 128 and a first support frame 129, and the first support frame 129 is located between the third discharge pipe 128 and the third conveying motor 130;

conveying screws 137 are respectively arranged in the inner cavities of the first conveying pipeline 109, the second conveying pipeline 110 and the third discharging pipe 128, spiral shearing blades 138 are arranged on the conveying screws 137, and the conveying screws 137 in the inner cavities of the first conveying pipeline 109, the second conveying pipeline 110 and the third discharging pipe 128 are respectively connected to output shafts of a first conveying motor 118, a second conveying motor 119 and a third conveying motor 130;

electric heating wires are arranged in the inner parts of the side walls of the first premixing tank 103, the second premixing tank 104 and the mixing tank 113.

Referring to fig. 1 to 8, the working process of the high-efficiency mixing device in this embodiment for preparing the mixture is as follows:

the method comprises the following steps: starting a first premixing motor 107 and a second premixing motor 108, wherein the first premixing motor 107 and the second premixing motor 108 operate to respectively drive a first stirring blade 122 in the inner cavities of a first premixing tank 103 and a second premixing tank 104 to rotate through a rotating shaft;

step two: putting the wood fiber material into a first premixing tank 103 from a first feeding hole 105, uniformly spraying the saturated aqueous solution of the flame retardant on the surface of the wood fiber material, mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min by a rotating first stirring blade 122, and uniformly mixing to obtain the wood fiber material subjected to flame retardant treatment;

thermoplastic plastics, a lubricant, a coupling agent and an antioxidant are put into the second premixing tank 104 from the second feeding hole 106, the thermoplastic plastics, the lubricant, the coupling agent and the antioxidant are mixed for 10min to 20min by the rotating first stirring blade 122, and after uniform mixing, a premix is obtained;

step three: starting the first conveying motor 118 and the second conveying motor 119, wherein the first conveying motor 118 operates to drive the conveying screw 137 and the spiral shearing blade 138 inside the first conveying pipeline 109 to rotate, and the second conveying motor 119 operates to drive the conveying screw 137 and the spiral shearing blade 138 inside the second conveying pipeline 110 to rotate;

step four: the wood fiber materials subjected to flame retardant treatment fall into a first conveying pipeline 109 through a first discharge pipe 116, are cut through a conveying screw 137 and a spiral cutting blade 138 and are conveyed into a mixing hopper 111 from a first transfer material port 123, the premix falls into a second conveying pipeline 110 through a second discharge pipe 117, are cut through the conveying screw 137 and the spiral cutting blade 138 and are conveyed into the mixing hopper 111 from a second transfer material port 124, and the wood fiber materials subjected to flame retardant treatment and the premix enter a mixing tank 113 through the bottom of the mixing hopper 111;

step five: starting the stirring motor 133, wherein the stirring motor 133 operates to drive the second stirring blade 136 to rotate through the driving belt pulley 134 and the driven belt pulley 135, the rotating second stirring blade 136 stirs the wood fiber material subjected to flame retardant treatment and the premix for 10min to 20min at the temperature of 60 ℃ to 110 ℃, and the initial mixture is obtained after uniform stirring;

step six: starting the stretching cylinder 125, wherein the stretching cylinder 125 contracts to pull the striker plate 126 to move out of the third discharge pipe 127, and the primary mixture is conveyed to the storage hopper 114 through the third discharge pipe 127 and then falls into the third conveying pipeline 115;

step seven: the third conveying motor 130 is started, the third conveying motor 130 operates to drive the conveying screw 137 and the spiral shearing blade 138 inside the third conveying pipeline 115 to rotate, and the conveying screw 137 and the spiral shearing blade 138 shear the initial mixture and discharge the initial mixture from the third discharge pipe 128 to obtain a mixture.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims

1. The high-flame-retardancy plastic hollow floor is characterized by comprising the following components in parts by weight: 50-70 parts of flame-retardant treated wood fiber material, 30-50 parts of thermoplastic plastic, 0.5-3 parts of lubricant, 2-8 parts of coupling agent and 0.5-5 parts of antioxidant;

2. The high flame retardant plastic hollow floor board as claimed in claim 1, wherein the thermoplastic plastic is one or a mixture of two of polyethylene and polypropylene; the lubricant is one or a mixture of two of maleic anhydride grafted polyethylene wax and maleic anhydride grafted polypropylene wax; the coupling agent is one or a mixture of more of organic siloxane, silane coupling agent and graft modified polymer; the antioxidant is one or a mixture of several of antioxidant 1010, 2, 6-di-tert-butyl-4-methylphenol and tris (2, 4-di-tert-butylphenyl) phosphite.

3. The high flame retardant plastic hollow floor as claimed in claim 1, wherein the flame retardant in the step one S1 is a mixture of low polymerization degree ammonium polyphosphate, guanidine sulfamate and sodium octaborate with a polymerization degree of less than 50 in a mass ratio of 2:1: 1.

4. The high flame retardant plastic hollow floor as claimed in claim 1, wherein the wood fiber material in the step one S2 is one or a mixture of wood powder, bamboo powder, straw powder, rice hull powder, fruit hull powder and hemp fiber, and the particle size of the wood fiber material is 40-300 mesh.

5. The production process of the plastic hollow floor with high flame retardance is characterized by comprising the following steps of:

s2, putting the wood fiber material into a first premixing tank (103) from a first feeding hole (105) prepared by high-efficiency mixing equipment, uniformly spraying a saturated aqueous solution of a flame retardant on the surface of the wood fiber material in a mass ratio of 1:5, and mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min to obtain the wood fiber material subjected to flame retardant treatment;

step two, preparing premix:

putting the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant into a second premixing tank (104) from a second feeding hole (106) prepared by high-efficiency mixing equipment, and mixing the thermoplastic plastic, the lubricant, the coupling agent and the antioxidant for 10-20 min to obtain a premix;

step three, preparing a mixture:

t1, the wood fiber material subjected to flame retardant treatment falls into a first conveying pipeline (109) through a first discharge pipe (116), and is sheared and conveyed into a mixing hopper (111) through a conveying screw (137) and a spiral shearing blade (138) in the first conveying pipeline (109);

t2, the premix falls into a second conveying pipeline (110) through a second discharge pipe (117), and is sheared and conveyed into a mixing hopper (111) through a conveying screw (137) and a spiral shearing blade (138) inside the second conveying pipeline (110);

t3, the wood fiber material subjected to flame retardant treatment and the premix enter a mixing tank (113) together through the bottom of a mixing hopper (111), the wood fiber material subjected to flame retardant treatment and the premix are stirred for 10-20 min by a rotating second stirring blade (136) at the temperature of 60-110 ℃, and a primary mixture is obtained after uniform stirring;

t4, conveying the primary mixture to a storage hopper (114) through a third discharge pipe (127), then dropping into a third conveying pipeline (115), shearing the primary mixture through a conveying screw (137) and a spiral shearing blade (138) in the third conveying pipeline (115), and discharging the primary mixture from a third discharge pipe (128) to obtain a mixture;

step four, preparing the plastic hollow floor with high flame retardance:

6. The production process of the high-flame-retardancy plastic hollow floor as claimed in claim 5, wherein the working process of the high-efficiency mixing equipment for preparing the mixture is as follows:

the method comprises the following steps: starting a first premixing motor (107) and a second premixing motor (108), wherein the first premixing motor (107) and the second premixing motor (108) operate to respectively drive a first stirring blade (122) in the inner cavities of a first premixing tank (103) and a second premixing tank (104) to rotate through a rotating shaft;

step two: putting the wood fiber material into a first premixing tank (103) from a first feeding hole (105), uniformly spraying a saturated aqueous solution of the flame retardant on the surface of the wood fiber material, mixing the saturated aqueous solution of the flame retardant and the wood fiber material for 10-20 min by a rotating first stirring blade (122), and uniformly mixing to obtain the wood fiber material subjected to flame retardant treatment;

thermoplastic plastics, a lubricant, a coupling agent and an antioxidant are put into a second premixing tank (104) from a second feeding hole (106), the thermoplastic plastics, the lubricant, the coupling agent and the antioxidant are mixed for 10-20 min by a rotating first stirring blade (122), and after uniform mixing, a premix is obtained;

step three: starting a first conveying motor (118) and a second conveying motor (119), wherein the first conveying motor (118) operates to drive a conveying screw (137) and a spiral shearing blade (138) in a first conveying pipeline (109) to rotate, and the second conveying motor (119) operates to drive the conveying screw (137) and the spiral shearing blade (138) in a second conveying pipeline (110) to rotate;

step four: the wood fiber material subjected to flame retardant treatment falls into a first conveying pipeline (109) through a first discharge pipe (116), is sheared through a conveying screw (137) and a spiral shearing blade (138) and is conveyed into a mixing hopper (111) from a first transfer material port (123), the premix falls into a second conveying pipeline (110) through a second discharge pipe (117), is sheared through the conveying screw (137) and the spiral shearing blade (138) and is conveyed into the mixing hopper (111) from a second transfer material port (124), and the wood fiber material subjected to flame retardant treatment and the premix jointly enter a mixing tank (113) through the bottom of the mixing hopper (111);

step five: starting a stirring motor (133), wherein the stirring motor (133) operates to drive a second stirring blade (136) to rotate through a driving belt pulley (134) and a driven belt pulley (135), the rotating second stirring blade (136) stirs the wood fiber material subjected to flame retardant treatment and the premix for 10-20 min at the temperature of 60-110 ℃, and the initial mixture is obtained after uniform stirring;

step six: starting the stretching cylinder (125), wherein the stretching cylinder (125) contracts to pull the striker plate (126) to move out of the third discharge pipe (127), and the primary mixture is conveyed to the storage hopper (114) through the third discharge pipe (127) and then falls into the third conveying pipeline (115);

step seven: and starting the third conveying motor (130), driving a conveying screw (137) and a spiral shearing blade (138) in the third conveying pipeline (115) to rotate by the operation of the third conveying motor (130), shearing the initial mixture by the conveying screw (137) and the spiral shearing blade (138) and discharging the initial mixture from the third discharging pipe (128) to obtain the mixture.