A kind of polymer phosphogypsum cable bridge and its manufacturing method

Abstract

The present invention relates to a polymer phosphogypsum cable bridge, comprising a shell, wherein the raw materials for preparing the shell include the following components: 90-110 parts of polyvinyl chloride resin, 90-110 parts of type II anhydrous gypsum, 60-80 parts of fiber mixture, 1-10 parts of polyurethane, 1-10 parts of methyl tributanoximosilane, 1-10 parts of vinyl tributanoximosilane, 1-3 parts of stearic acid, 3-6 parts of titanium dioxide, 20-30 parts of impact modifier and 1-5 parts of dibasic lead stearate; wherein the fiber mixture is polyethersulfone spiral fiber and chopped fiber, and the chopped fiber is at least two of graphite chopped fiber, glass chopped fiber and basalt chopped fiber. The polymer phosphogypsum cable bridge of the present invention has strong rigidity, good tensile force, sufficient load capacity, good flame retardancy, heat resistance and corrosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of cable bridges, and in particular to a polymer phosphogypsum cable bridge and a manufacturing method thereof. Background Art

[0002] The comprehensive utilization of phosphogypsum has received great attention and concern from enterprises, researchers and other parties, which has led to the extensive application of phosphogypsum resources in agriculture, industry, building materials and other fields. The existing plastic cable tray production technology also uses phosphogypsum as the production raw material of plastic cable trays. By combining the preparation with plastic technology, it has brought a new way for the comprehensive utilization of phosphogypsum with low energy consumption and no pollution.

[0003] However, as an important part of power construction and road traffic, cable bridges have high requirements for strength, flame retardancy and impact resistance. Especially in some harsh environments, their performance will be seriously affected. For example, existing bridges are prone to rust in acid and alkali adhesion, corrosive gas, mold adhesion and oily environments, have short lifespans, and have poor impact resistance under high or low temperature conditions. When phosphogypsum is used as a raw material for plastic cable bridges, its structure is not compact enough, its stability is poor, and the interface bonding between phosphogypsum and resin is poor, resulting in poor mechanical properties and poor tensile strength.

[0004] The existing technology is to increase the strength of the gypsum base by adding glass fiber to the gypsum material, such as a glass fiber gypsum board disclosed in patent publication number CN116968398, which enhances the mechanical properties of the gypsum board to a certain extent. However, this technical solution cannot meet the requirements of cable trays with higher flame retardancy. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a new type of polymer phosphogypsum cable tray and a preparation method thereof.

[0006] To achieve the above-mentioned purpose, the present invention provides a polymer phosphogypsum cable bridge, comprising the shell, and the raw materials for preparing the shell include the following components: 90-110 parts of polyvinyl chloride resin, 90-110 parts of type II anhydrous gypsum, 60-80 parts of fiber mixture, 1-10 parts of polyurethane, 1-10 parts of methyl tributylidene oxime silane, 1-10 parts of vinyl tributylidene oxime silane, 1-3 parts of stearic acid, 3-6 parts of titanium dioxide, 20-30 parts of impact modifier and 1-5 parts of dibasic lead stearate;

[0007] The fiber mixture is polyethersulfone curly fibers and chopped fibers, and the chopped fibers are at least two of graphite chopped fibers, glass chopped fibers and basalt chopped fibers.

[0008] In an improved technical solution, the fiber mixture is formed by mixing 35-45 parts of polyethersulfone curly fibers, 10-15 parts of graphite chopped fibers and 15-20 parts of glass chopped fibers.

[0009] In an improved technical solution, the fiber length of the chopped fibers is 5-20 mm, and the fiber diameter of the chopped fibers is 0.1-0.5 mm; the curled length of the polyethersulfone curled fibers is 3-10 mm, the number of curls is 1 / 1 mm, and the fiber diameter is 0.1-0.5 mm.

[0010] In an improved technical solution, the type II anhydrous gypsum has a fineness of 800 to 1000 meshes.

[0011] In an improved technical solution, the impact modifier is at least one of the impact modifier ACR61, the impact modifier CPE135 and the impact modifier MBS56.

[0012] In another improved technical scheme, the raw materials for preparing the bridge frame include the following components: 100 parts of polyvinyl chloride resin, 100 parts of type II anhydrous gypsum, 40 parts of polyethersulfone curly fiber, 12 parts of graphite chopped fiber, 18 parts of glass chopped fiber, 6 parts of polyurethane, 5 parts of methyl tributylidene silane, 5 parts of vinyl tributylidene silane, 2 parts of stearic acid, 4.5 parts of titanium dioxide, 10 parts of impact modifier ACR61, 15 parts of impact modifier CPE135 and 2.5 parts of dibasic lead stearate.

[0013] The second aspect of the present invention discloses a method for preparing the above-mentioned polymer phosphogypsum cable tray, comprising the following steps:

[0014] Step 1: Pretreatment of fiber composition:

[0015] The graphite fibers and the glass fibers are placed in a fiber combing machine for opening to form monofilaments, and then cut; wherein the obtained graphite chopped fibers and glass chopped fibers form a short fiber structure with a length of 2-10 mm and a diameter of 0.1-0.5 mm;

[0016] The polyethersulfone fiber is subjected to the processes of drawing, shaping and preheating, and then enters a crimping machine for crimping, and then is cut; the obtained spiral fiber forms a crimped fiber structure with a crimp length of 3-10 mm, a crimp number of 1 / 1 mm, and a fiber diameter of 0.1-0.5 mm;

[0017] Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C.

[0018] Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool;

[0019] Step 4: Put the material after standing and cooling in step 3 into an extruder for plasticization and molding at the same time to obtain the bridge frame.

[0020] In an improved technical solution, the first heating temperature in step three is 100-110°C, the stirrer speed is 1000-3000 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in step three is 120-130°C, the stirrer speed is 3000-6000 revolutions per minute, and the mixing time is 20-30 minutes; the standing cooling time is 60-120 minutes.

[0021] In an improved technical solution, the polyethersulfone fiber enters a crimping machine for crimping after being subjected to the processes of drawing, shaping and preheating, and the crimping process is specifically as follows:

[0022] The polyethersulfone fiber is placed in a high-temperature oil bath for the first stretching at a temperature of 90-110°C and a first stretching ratio of 2.0-3.0; then placed in a steam dryer for the second stretching at a temperature of 90-110°C and a second stretching ratio of 1.0-1.5;

[0023] The drawn polyethersulfone fiber is sent to a setting furnace with a setting temperature of 190-220°C and a setting time of 60-120s;

[0024] After shaping, the polyethersulfone fiber enters a crimping machine for crimping to obtain a crimped polyethersulfone fiber, wherein the crimping main pressure of the crimping machine is 0.2-0.8 MPa and the crimping back pressure is 0.2-0.5 MPa.

[0025] In another improved technical solution, the cutting process is specifically: cutting the curled polyethersulfone fiber by a disc cutter, and the cutting blade temperature is 270-320°C.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The polymer phosphogypsum cable bridge of the present invention uses phosphogypsum, resin material and mixed fiber as raw materials, and evenly diffuses the mixed curly fiber and short fiber material in the profile to form a mutually cross-linked three-dimensional network, so that the bridge has flame retardant and high temperature resistant properties, and enhances the toughness of the cable bridge, while improving the interface bonding force with phosphogypsum and resin material. Polyethersulfone fiber, as a non-crystalline thermoplastic high temperature resistant engineering plastic with excellent comprehensive performance, has excellent flame retardancy, and has very low smoke emission during combustion, and still has good flame retardancy without adding any additives to the formula.

[0028] The curly fibers are arranged in the mixed fibers of the present invention, which can ensure that the morphological fibers are mixed evenly at high speed and prevent the fibers from breaking due to high-speed impact, thereby ensuring the original length of the fibers; and the other fibers are arranged as short-cut fibers, which can avoid the problem that the fully curly fibers are not easy to disperse evenly, so as to form a three-dimensional network with uniform density. The shape of the curly fibers and short-cut fiber structures of the present invention also avoids the technical problems of insufficient physical crosslinking of fully straight fibers, serious damage, and easy uneven distribution of fully curly fibers. In addition, the polyurethane in the formula improves the interfacial bonding between the fibers and the resin and gypsum.

[0029] The cable bridge of the present invention reinforces phosphogypsum and resin-based materials through mixed fibers, so that the bridge has high specific strength, high specific stiffness, excellent fatigue resistance, good tensile force, sufficient load capacity, good flame retardancy, heat resistance and corrosion resistance, and long service life. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a technical solution: a new type of polymer phosphogypsum plastic profile can be used to prepare a cable bridge, which is mainly used in cable laying projects in petrochemical, integrated pipe gallery, subway expressway, ship port and other projects, and can generally meet the project's demand for corrosion-resistant, long-life, beautiful and environmentally friendly cable bridges. At the same time, the polymer phosphogypsum cable bridge is also suitable for indoor and outdoor cable laying conditions, can be laid openly or concealed, and can be placed in a cable trench or a derrick.

[0032] The polymer phosphogypsum cable bridge of the present invention comprises a shell, and the raw materials for preparing the shell comprise the following components: 90-110 parts of polyvinyl chloride resin, 90-110 parts of type II anhydrous gypsum, 60-80 parts of fiber mixture, 1-10 parts of polyurethane, 1-10 parts of methyl tributylidene oxime silane, 1-10 parts of vinyl tributylidene oxime silane, 1-3 parts of stearic acid, 3-6 parts of titanium dioxide, 20-30 parts of impact modifier and 1-5 parts of dibasic lead stearate;

[0033] The fiber mixture is polyethersulfone curly fibers and chopped fibers, and the chopped fibers are at least two of graphite chopped fibers, glass chopped fibers and basalt chopped fibers.

[0034] Specifically, the fiber mixture is formed by mixing 35-45 parts of polyethersulfone curly fibers, 10-15 parts of graphite chopped fibers, and 15-20 parts of glass chopped fibers.

[0035] The fiber length of the chopped fibers is 5-20 mm, and the fiber diameter of the chopped fibers is 0.1-0.5 mm; the curled length of the polyethersulfone curled fibers is 3-10 mm, the number of curls is 1 / 1 mm, and the fiber diameter is 0.1-0.5 mm.

[0036] The type II anhydrous gypsum has a fineness of 800 to 1000 meshes.

[0037] The impact modifier is at least one of impact modifier ACR61, impact modifier CPE135 and impact modifier MBS56.

[0038] A specific example is given below.

[0039] Example 1

[0040] The raw material formula of polymer phosphogypsum cable tray shell is:

[0041] 1000g of polyvinyl chloride resin, 1000g of type II anhydrous gypsum, 400g of polyethersulfone curly fiber, 120g of graphite chopped fiber, 180g of glass chopped fiber, 60g of polyurethane, 50g of methyl tributylidene oxime silane, 50g of vinyl tributylidene oxime silane, 20g of stearic acid, 45g of titanium dioxide, 100g of impact modifier ACR61, 150g of impact modifier CPE135 and 25 parts of dibasic lead stearate.

[0042] The preparation method is:

[0043] Step 1: Pretreatment of fiber composition:

[0044] The graphite fibers and the glass fibers are placed in a fiber combing machine for opening to form monofilaments, and then cut; wherein the obtained graphite chopped fibers and glass chopped fibers form a short fiber structure with a length of 2-10 mm and a diameter of 0.1-0.5 mm;

[0045] The polyethersulfone fiber is placed in a high-temperature oil bath for the first stretching at a temperature of 90-110°C and a first stretching ratio of 2.0-3.0; then placed in a steam dryer for the second stretching at a temperature of 90-110°C and a second stretching ratio of 1.0-1.5;

[0046] The drawn polyethersulfone fiber is sent to a setting furnace with a setting temperature of 190-220°C and a setting time of 60-120s;

[0047] After shaping, the polyethersulfone fiber enters a crimping machine for crimping to obtain a crimped polyethersulfone fiber, wherein the crimping main pressure of the crimping machine is 0.2-0.8MPa and the crimping back pressure is 0.2-0.5MPa;

[0048] The curled polyethersulfone fiber is cut by a disc cutter, and the cutting blade temperature is 270-320°C.

[0049] The obtained spiral fiber forms a curled fiber structure with a curled length of 3-10 mm, a curl number of 1 / 1 mm, and a fiber diameter of 0.1-0.5 mm.

[0050] Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated amount of type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. and stirring evenly.

[0051] Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool;

[0052] Wherein, the first heating temperature in the step three is 100-110° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in the step three is 120-130° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; and the standing cooling time is 60-120 minutes.

[0053] Step 4: Place the material after cooling in step 3 into an extruder for plasticization and compression molding to prepare the required specimens according to the test standard.

[0054] Example 2

[0055] The raw material formula of polymer phosphogypsum cable tray shell is:

[0056] 900g of polyvinyl chloride resin, 900g of type II anhydrous gypsum, 350g of polyethersulfone curly fiber, 100g of graphite chopped fiber, 150g of glass chopped fiber, 10g of polyurethane, 10g of methyl tributylidene silane, 10g of vinyl tributylidene silane, 10g of stearic acid, 30g of titanium dioxide, 100g of impact modifier CPE135, 100g of impact modifier MBS56 and 10g of dibasic lead stearate.

[0057] The preparation method adopts the preparation method shown in Example 1.

[0058] Example 3

[0059] The raw material formula of polymer phosphogypsum cable tray is:

[0060] 1100g of polyvinyl chloride resin, 1100g of type II anhydrous gypsum, 450g of polyethersulfone curly fiber, 150g of graphite chopped fiber, 200g of glass chopped fiber, 100g of polyurethane, 100g of methyl tributylidene silane, 100g of vinyl tributylidene silane, 30g of stearic acid, 60g of titanium dioxide, 150g of impact modifier ACR61, 150g of impact modifier CPE135 and 50g of dibasic lead stearate.

[0061] The preparation method adopts the preparation method shown in Example 1.

[0062] Example 3

[0063] The raw material formula of polymer phosphogypsum cable tray shell is:

[0064] 1050g of polyvinyl chloride resin, 1050g of type II anhydrous gypsum, 380g of polyethersulfone curly fiber, 100g of graphite chopped fiber, 100g of glass chopped fiber, 100g of basalt chopped fiber, 40g of polyurethane, 65g of methyl tributylidene silane, 80g of vinyl tributylidene silane, 22g of stearic acid, 35g of titanium dioxide, 120g of impact modifier ACR61, 150g of impact modifier CPE135 and 35g of dibasic lead stearate.

[0065] The preparation method adopts the preparation method shown in Example 1; wherein the basalt chopped fibers are processed in the same manner as the graphite chopped fibers and glass chopped fibers in step 1.

[0066] Comparative Example 1

[0067] The difference from Example 1 is that no polyethersulfone curly fibers, graphite chopped fibers and glass chopped fibers are added to the raw materials.

[0068] The raw material formula of the cable tray shell is:

[0069] 1000g of polyvinyl chloride resin, 1000g of type II anhydrous gypsum, 60g of polyurethane, 50g of methyl tributylidene silane, 50g of vinyl tributylidene silane, 20g of stearic acid, 45g of titanium dioxide, 100g of impact modifier ACR61, 150g of impact modifier CPE135 and 25 parts of dibasic lead stearate.

[0070] The preparation method is:

[0071] Step 1: Pretreatment of type II anhydrous gypsum: drying the formulated type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. to uniformly stir.

[0072] Step 2, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and the first heating and stirring are performed; then polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and the second heating and stirring are performed; after hot mixing, the mixture is allowed to stand and cool;

[0073] Wherein, the first heating temperature in the step three is 100-110° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in the step three is 120-130° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; and the standing cooling time is 60-120 minutes.

[0074] Step 3: Put the material after cooling in step 3 into an extruder for plasticization and compression molding, and prepare the required specimens according to the test standard.

[0075] Comparative Example 2

[0076] The difference from Example 1 is that no polyethersulfone crimped fiber is added to the raw material.

[0077] The raw material formula of the cable tray shell is:

[0078] 1000g of polyvinyl chloride resin, 1000g of type II anhydrous gypsum, 120g of graphite chopped fibers, 180g of glass chopped fibers, 60g of polyurethane, 50g of methyl tributylidene oxime silane, 50g of vinyl tributylidene oxime silane, 20g of stearic acid, 45g of titanium dioxide, 100g of impact modifier ACR61, 150g of impact modifier CPE135 and 25 parts of dibasic lead stearate.

[0079] The preparation method is:

[0080] Step 1: Pretreatment of fiber composition:

[0081] The graphite fibers and glass fibers are placed in a fiber combing machine to be loosened and formed into monofilaments, and then cut; wherein the obtained graphite chopped fibers and glass chopped fibers form a short fiber structure with a length of 2-10 mm and a diameter of 0.1-0.5 mm.

[0082] Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated amount of type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. and stirring evenly.

[0083] Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool;

[0084] Wherein, the first heating temperature in the step three is 100-110° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in the step three is 120-130° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; and the standing cooling time is 60-120 minutes.

[0085] Step 4: Place the material after cooling in step 3 into an extruder for plasticization and compression molding to prepare the required specimens according to the test standard.

[0086] Comparative Example 3

[0087] The difference from Example 1 is that no graphite chopped fibers and glass chopped fibers are added to the raw materials.

[0088] The raw material formula of the cable tray shell is:

[0089] 1000g of polyvinyl chloride resin, 1000g of type II anhydrous gypsum, 400g of polyethersulfone curly fiber, 60g of polyurethane, 50g of methyl tributylidene oxime silane, 50g of vinyl tributylidene oxime silane, 20g of stearic acid, 45g of titanium dioxide, 100g of impact modifier ACR61, 150g of impact modifier CPE135 and 25 parts of dibasic lead stearate.

[0090] The preparation method is:

[0091] Step 1: Pretreatment of fiber composition:

[0092] The polyethersulfone fiber is placed in a high-temperature oil bath for the first stretching at a temperature of 90-110°C and a first stretching ratio of 2.0-3.0; then placed in a steam dryer for the second stretching at a temperature of 90-110°C and a second stretching ratio of 1.0-1.5;

[0093] The drawn polyethersulfone fiber is sent to a setting furnace with a setting temperature of 190-220°C and a setting time of 60-120s;

[0094] After shaping, the polyethersulfone fiber enters a crimping machine for crimping to obtain a crimped polyethersulfone fiber, wherein the crimping main pressure of the crimping machine is 0.2-0.8MPa and the crimping back pressure is 0.2-0.5MPa;

[0095] The curled polyethersulfone fiber is cut by a disc cutter, and the cutting blade temperature is 270-320°C.

[0096] The obtained spiral fiber forms a curled fiber structure with a curled length of 3-10 mm, a curl number of 1 / 1 mm, and a fiber diameter of 0.1-0.5 mm.

[0097] Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated amount of type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. and stirring evenly.

[0098] Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool;

[0099] Wherein, the first heating temperature in the step three is 100-110° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in the step three is 120-130° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; and the standing cooling time is 60-120 minutes.

[0100] Step 4: Place the material after cooling in step 3 into an extruder for plasticization and compression molding to prepare the required specimens according to the test standard.

[0101] Comparative Example 4

[0102] The difference from Example 1 is that the polyethersulfone fibers added to the raw materials are chopped fibers.

[0103] The raw material formula of the cable tray shell is:

[0104] 1000g of polyvinyl chloride resin, 1000g of type II anhydrous gypsum, 120g of graphite chopped fibers, 180g of glass chopped fibers, 60g of polyurethane, 50g of methyl tributylidene oxime silane, 50g of vinyl tributylidene oxime silane, 20g of stearic acid, 45g of titanium dioxide, 100g of impact modifier ACR61, 150g of impact modifier CPE135 and 25 parts of dibasic lead stearate.

[0105] The preparation method is:

[0106] Step 1: Pretreatment of fiber composition:

[0107] Graphite fibers, glass fibers, and polyethersulfone fibers are placed in a fiber combing machine for loosening to form monofilaments, and then cut; wherein the obtained graphite chopped fibers, glass chopped fibers, and polyethersulfone chopped fibers form a short fiber structure with a length of 2-10 mm and a diameter of 0.1-0.5 mm.

[0108] Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated amount of type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. and stirring evenly.

[0109] Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool;

[0110] Wherein, the first heating temperature in the step three is 100-110° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in the step three is 120-130° C., the stirrer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; and the standing cooling time is 60-120 minutes.

[0111] Step 4: Place the material after cooling in step 3 into an extruder for plasticization and compression molding to prepare the required specimens according to the test standard.

[0112] Experimental example

[0113] Example 1, Control Example 1, Control Example 2, Control Example 3 and Control Example 4 were prepared according to the test standard to perform the measurement.

[0114] Inspection items include: safe working load, low temperature drop hammer impact test, aging resistance, corrosion resistance, tensile properties, and flame retardancy.

[0115] Inspection basis: GB / T 1040.1-2018 "Determination of tensile properties of plastics Part 1: General", GB / T 8814-2017 "Unplasticized polyvinyl chloride (PVC-U) profiles for doors and windows", JB / T 12147-2015 "Plastic cable tray", GB / T21762-2008 "Cable management cable tray system and cable ladder system", GB / T 2406.2-2009 "Determination of combustion behavior of plastics by oxygen index method Part 2 Room temperature test", GB / T 2423.24-2013 "Environmental testing Part 2: Test method Test Sa: Simulated solar radiation on the ground and its test guidelines".

[0116] Judgment basis: JB / T 12147-2015 "Plastic Cable Tray"; Q / CFD 001-2022 "Polymer Phosphogypsum Alloy Flame Retardant Cable Tray".

[0117] The test data of the finished product is shown in the following table:

[0118]

[0119]

[0120] It can be seen from the above table that the material prepared by the formula and method of Example 1 of the present invention has excellent tensile properties, aging resistance, corrosion resistance and flame retardancy. At the same time, it has good drop hammer impact under a safe working load of 550N / m, and other performances are also the most outstanding. Compared with the control example 1, it can be seen that the mixed short fiber material of Example 1 makes the bridge have better flame retardant and high temperature resistance. The short fiber material enhances the toughness of the bridge, and it has better tensile strength and specific stiffness, which greatly improves the mechanical properties of the bridge. Compared with Example 1, the aging resistance and tensile properties of the control example 2 are relatively poor; the flame retardant and smoke resistance properties are not good. The control example 2 is equivalent to the control example 1. It can be seen that the polyethersulfone curled fiber has good flame retardant and smoke resistance properties. Compared with Example 1, the load bearing capacity of the control example 3 is relatively poor, and the mechanical properties are slightly weak. Compared with Example 1, the tensile properties of the control example 4 are relatively poor, and the load bearing capacity is slightly poor. It can be seen that the combination of the short-cut fiber and the curly fiber mixed structure of the present invention is better than the short-cut fiber in mechanical properties.

[0121] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymer phosphogypsum cable tray, comprising a shell, characterized in that: The raw materials for preparing the shell include the following components: 90-110 parts of polyvinyl chloride resin, 90-110 parts of type II anhydrous gypsum, 60-80 parts of fiber mixture, 1-10 parts of polyurethane, 1-10 parts of methyl tributylidene oxime silane, 1-10 parts of vinyl tributylidene oxime silane, 1-3 parts of stearic acid, 3-6 parts of titanium dioxide, 20-30 parts of impact modifier and 1-5 parts of dibasic lead stearate; The fiber mixture is polyethersulfone curly fibers and chopped fibers, and the chopped fibers are at least two of graphite chopped fibers, glass chopped fibers and basalt chopped fibers.

2. The polymer phosphogypsum cable tray according to claim 1, characterized in that: The fiber mixture is prepared by mixing 35-45 parts of polyethersulfone curly fibers, 10-15 parts of graphite chopped fibers and 15-20 parts of glass chopped fibers.

3. The polymer phosphogypsum cable tray according to claim 1, characterized in that: The fiber length of the chopped fibers is 5-20 mm, and the fiber diameter of the chopped fibers is 0.1-0.5 mm; the curled length of the polyethersulfone curled fibers is 3-10 mm, the number of curls is 1 / 1 mm, and the fiber diameter is 0.1-0.5 mm.

4. The polymer phosphogypsum cable tray according to claim 1, characterized in that: The type II anhydrous gypsum has a fineness of 800 to 1000 meshes.

5. The polymer phosphogypsum cable tray according to claim 1, characterized in that: The impact modifier is at least one of impact modifier ACR61, impact modifier CPE135 and impact modifier MBS56.

6. The polymer phosphogypsum cable tray according to claim 1, characterized in that: The raw materials for preparing the bridge frame include the following components: 100 parts of polyvinyl chloride resin, 100 parts of type II anhydrous gypsum, 40 parts of polyethersulfone curly fiber, 12 parts of graphite chopped fiber, 18 parts of glass chopped fiber, 6 parts of polyurethane, 5 parts of methyl tributylidene oxime silane, 5 parts of vinyl tributylidene oxime silane, 2 parts of stearic acid, 4.5 parts of titanium dioxide, 10 parts of impact modifier ACR61, 15 parts of impact modifier CPE135 and 2.5 parts of dibasic lead stearate.

7. A method for preparing the polymer phosphogypsum cable bridge according to claim 6, comprising the following steps: Step 1: Pretreatment of fiber composition: The graphite fiber and the glass fiber are placed in a fiber combing machine to be opened to form a single filament, and then cut; wherein, The obtained graphite chopped fibers and glass chopped fibers form a short fiber structure with a length of 2-10 mm and a diameter of 0.1-0.5 mm; The polyethersulfone fiber is subjected to the processes of drawing, shaping and preheating, and then enters a crimping machine for crimping, and then is cut; a crimped fiber structure having a crimp length of 3-10 mm, a crimp number of 1 / 1 mm, and a fiber diameter of 0.1-0.5 mm is obtained; Step 2: Pretreatment of type II anhydrous gypsum: drying the formulated type II anhydrous gypsum, and then mixing the dried type II anhydrous gypsum and stearic acid at 80° C. Step 3, batch mixing treatment: the formula amount of polyvinyl chloride resin, type II anhydrous gypsum treated in step 2, methyl tributylidene oxime silane, vinyl tributylidene oxime silane, stearic acid and titanium dioxide are placed in a mixer and mixed, and heated and stirred for the first time; then the formula amount of fiber mixture treated in step 1, polyurethane, impact modifier ACR61, impact modifier CPE135 and dibasic lead stearate are added, and heated and stirred for the second time; after hot mixing, the mixture is allowed to stand and cool; Step 4: Put the material after standing and cooling in step 3 into an extruder for plasticization and molding at the same time to obtain the bridge frame.

8. The preparation method according to claim 7, characterized in that: The first heating temperature in step three is 100-110° C., the mixer speed is 1500-1600 revolutions per minute, and the mixing time is 10-20 minutes; the second heating temperature in step three is 120-130° C., the mixer speed is 1500-1600 revolutions per minute, and the mixing time is 20-30 minutes; the standing cooling time is 60-120 minutes.

9. The preparation method according to claim 7, characterized in that: The polyethersulfone fiber enters the crimping machine after the drafting, shaping and preheating processes for crimping treatment as follows: The polyethersulfone fiber is placed in a high-temperature oil bath for the first stretching at a temperature of 90-110°C and a first stretching ratio of 2.0-3.0; then placed in a steam dryer for the second stretching at a temperature of 90-110°C and a second stretching ratio of 1.0-1.5; The drawn polyethersulfone fiber is sent to a setting furnace with a setting temperature of 190-220°C and a setting time of 60-120s; After shaping, the polyethersulfone fiber enters a crimping machine for crimping to obtain a crimped polyethersulfone fiber, wherein the crimping main pressure of the crimping machine is 0.2-0.8 MPa and the crimping back pressure is 0.2-0.5 MPa.

10. The preparation method according to claim 7, characterized in that: The cutting process is specifically as follows: the curled polyethersulfone fiber is cut by a disc cutter, and the cutting blade temperature is 270-320°C.

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