CN108660764B - Modification processing method of F-12 aramid fiber fabric of conveyor belt framework material - Google Patents
Modification processing method of F-12 aramid fiber fabric of conveyor belt framework material Download PDFInfo
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- 238000012986 modification Methods 0.000 title claims abstract description 23
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- 239000000463 material Substances 0.000 title claims abstract description 20
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
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- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
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- 229920000126 latex Polymers 0.000 claims description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 12
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 5
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/55—Epoxy resins
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
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- D—TEXTILES; PAPER
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- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
- D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
- D06M11/60—Ammonia as a gas or in solution
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
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- D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
- D06M2101/36—Aromatic polyamides
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Abstract
The invention discloses a modification processing method of a conveyer belt framework material F-12 aramid fiber fabric, which comprises the following steps: (1) pre-treating; (2) carrying out one-bath treatment by using a modifying solution; (3) drying the F-12 aramid fiber fabric after one bath; (4) primary high-temperature baking; (5) dipping RFL resin solution; (6) and (5) baking at high temperature for the second time to obtain a finished product. The invention has the advantages that: the bonding force between the F-12 aramid fiber fabric and rubber is obviously improved, and the peel strength and the breaking strength are higher than those of the existing industrial standard.
Description
The technical field is as follows:
the invention relates to a fiber fabric modification technology, in particular to a modification processing method of a conveyer belt framework material F-12 aramid fiber fabric.
Background art:
the F-12 fiber is the aramid fiber with the most excellent performance at present, and the heterocyclic structure of the macromolecule of the fiber ensures that the performance of the fiber in the aspects of flexibility, strength, fatigue resistance and the like is superior to that of the common para-aramid fiber; the F-12 aramid fiber has low density and light weight, and can greatly reduce energy consumption in the transportation process, so the fiber fabric is theoretically the best framework material of the conveyer belt.
However, the F-12 aramid fiber contains amide bonds inside, the amide bonds exist between two benzene rings, a large steric hindrance effect exists, and hydrogen bonds are difficult to form, so that the surface activity of the F-12 aramid fiber is poor. In order to use the fiber fabric as an optimal framework material of a conveyor belt, the adhesiveness between the F-12 aramid fiber and rubber must be improved, and therefore, the F-12 aramid fiber needs to be modified.
The invention content is as follows:
the invention aims to provide a modification processing method of a conveyor belt framework material F-12 aramid fiber fabric which is good in surface activity, strong in binding force with rubber, and higher in peel strength and breaking strength than the existing industry standard.
The purpose of the invention is implemented by the following technical scheme: a modification processing method of a conveyer belt framework material F-12 aramid fiber fabric comprises the following steps: (1) pre-treating; (2) carrying out one-bath treatment by using a modifying solution; (3) drying the F-12 aramid fiber fabric after one bath; (4) primary high-temperature baking; (5) dipping RFL resin solution; (6) baking at high temperature for the second time to obtain a finished product; wherein,
(1) pretreatment: cleaning the surface of the F-12 aramid fiber fabric by using ethanol at normal temperature to wash off the surface oiling agent of the F-12 aramid fiber fabric;
(2) carrying out one-bath treatment by using a modifying solution: soaking the pretreated F-12 aramid fiber fabric in the modification solution for 20min at normal temperature, then rolling uniformly, and adopting three-soaking and four-rolling with the pressure of 0.05 MP;
(3) drying the F-12 aramid fiber fabric after one bath: drying the F-12 aramid fiber fabric after one-bath impregnation at 80 ℃, and controlling the water content of the F-12 aramid fiber fabric to be below 5%;
(4) primary high-temperature baking: baking the dried F-12 aramid fiber fabric at the temperature of 200 ℃ for 2 min;
(5) dipping in an RFL resin solution: soaking the F-12 aramid fiber fabric subjected to primary high-temperature baking in an RFL resin solution at normal temperature for 20min, then rolling uniformly, and adopting three-soaking and four-rolling with the pressure of 0.05 MP;
(6) and (3) secondary high-temperature baking to obtain a finished product: and baking the F-12 aramid fiber fabric impregnated with the RFL resin solution at the temperature of 200 ℃ for 2min to obtain a finished product of the modified F-12 aramid fiber fabric.
Specifically, the modifying solution comprises the following components in parts by weight: 1.46-1.54 g of epoxy resin, 2.87-3.30 g of coupling agent and 95.67-95.16 g of water.
Specifically, the modified solution is prepared by the following method:
preparing materials: weighing 1.46-1.54 g of epoxy resin, 2.87-3.30 g of coupling agent and 95.67-95.16 g of water according to the following weight parts;
preparing an epoxy resin solution: adding half of the weighed water into a stirring tank, then adding the weighed epoxy resin into the stirring tank, and stirring until the epoxy resin is completely dissolved in the water to prepare an epoxy resin solution;
preparing a coupling agent solution: adjusting the pH value of the remaining half water to 3.8-4.2, and then dissolving the weighed coupling agent into the water with the pH value adjusted to prepare a coupling agent solution;
preparing a modified solution: and mixing the epoxy resin solution and the coupling agent solution, and stirring for 30min to obtain the modified liquid.
Specifically, the epoxy resin is EXE-313 type epoxy resin.
Specifically, the coupling agent is a silane coupling agent a 187.
Specifically, in the step (2), the bath ratio of the F-12 aramid fiber fabric to the modification liquid is 1:50, and the bath ratio is the mass ratio of the F-12 aramid fiber fabric to the modification liquid.
Specifically, the RFL resin solution comprises the following components in parts by weight: 100 g of distilled water, 0.40-0.44 g of caustic soda, 3.58-3.65 g of resorcinol, 5.21-5.38 g of formaldehyde, 2.82-2.96 g of ammonia water and 82.15-85.36 g of butyl Pix latex solution.
Specifically, the RFL resin solution is prepared by the following method:
preparing an RF solution:
weighing 66.67 g of distilled water and 0.40-0.44 g of caustic soda (NaOH) into a reaction tank, and stirring until the distilled water and the caustic soda (NaOH) are completely dissolved; after reacting for 5min, adding 3.58-3.65 g of resorcinol, controlling the temperature at 22-23 ℃, stirring for 30min, then weighing 5.21-5.38 g of formaldehyde, adding the formaldehyde into a reaction tank, stirring, controlling the temperature at 22-28 ℃, waiting for 5-6 h, and preparing an RF solution for later use;
preparing an RFL resin solution:
weighing 11.11 g of distilled water, 2.82-2.96 g of ammonia water and 82.15-85.36 g of butyl Pix latex solution, and adding into a mixing tank; weighing 11.11 g of distilled water, washing the beaker with the weighed butadiene-pyridine latex, and pouring the washed water into the mixing tank; and pouring the prepared RF solution into a mixing tank, washing the RF solution reaction tank by using 11.11 g of distilled water, pouring the washed water into the mixing tank, uniformly stirring, and standing for 30min to obtain the RFL resin solution.
Specifically, in the step (5), the bath ratio of the F-12 aramid fiber fabric to the RFL resin solution is 1: 20. The bath ratio is the mass ratio of the F-12 aramid fiber fabric to the RFL resin solution.
The technical scheme of the invention also comprises the modified F-12 aramid fiber fabric prepared by the method.
The invention has the advantages that: the bonding force between the F-12 aramid fiber fabric and rubber is obviously improved, and the peel strength and the breaking strength are higher than those of the existing industrial standard.
Description of the drawings:
FIG. 1 is an SEM image of the surface of an F-12 aramid fiber fabric after one-bath treatment with a modifying solution;
FIG. 2 is an infrared spectrum of the F-12 aramid fiber fabric after one-bath treatment with the modifying liquid;
FIG. 3 is a surface peeling diagram of the molded rubber-modified F-12 aramid fiber fabric;
FIG. 4 is a side view of a belt for vulcanization molding of a single-layer modified F-12 aramid fiber fabric skeleton of example 3;
FIG. 5 is a side view of a belt for vulcanization molding a double-layer modified F-12 aramid fiber fabric skeleton of example 3;
FIG. 6 shows the shape of a standard test specimen for strength measurement after vulcanization molding in example 3.
The specific implementation mode is as follows:
the specific parameters of the F-12 aramid fiber fabric selected in the following examples are as follows:
the fineness of the bundle filament is 2048 dtex; fabric parameters: plain weave, 84 warp density/10 cm, 84 weft density/10 cm, and 340 g/cm of fabric surface density3(ii) a Sample parameters: the sample size is 5cm multiplied by 25cm, and the gram weight of the sample is 6.5 g.
Example 1: a modification processing method of a conveyer belt framework material F-12 aramid fiber fabric comprises the following steps: (1) pre-treating; (2) carrying out one-bath treatment by using a modifying solution; (3) drying the F-12 aramid fiber fabric after one bath; (4) primary high-temperature baking; (5) dipping RFL resin solution; (6) baking at high temperature for the second time to obtain a finished product; wherein,
(1) pretreatment: cleaning the surface of the F-12 aramid fiber fabric by using ethanol at normal temperature to wash off the surface oiling agent of the F-12 aramid fiber fabric;
(2) carrying out one-bath treatment by using a modifying solution: soaking the pretreated F-12 aramid fiber fabric in a modification solution at normal temperature for 20min, wherein the bath ratio of the F-12 aramid fiber fabric to the modification solution is 1:50, then uniformly rolling by using a small padder, and adopting three-soaking and four-rolling with the pressure of 0.05 MP; the three-dipping four-rolling is specifically one-dipping one-rolling, one-dipping one-rolling and one-dipping two-rolling.
In this embodiment, the modifying solution comprises the following components in grams by weight: 1.46 g of epoxy resin, 2.87 g of coupling agent and 95.67 g of water.
The modified solution is prepared by the following method:
preparing materials: weighing 1.46 g of epoxy resin, 2.87 g of coupling agent and 95.67 g of water according to the following weight g of components;
preparing an epoxy resin solution: adding half of the weighed water into a stirring tank, then adding the weighed epoxy resin into the stirring tank, and stirring until the epoxy resin is completely dissolved in the water to prepare an epoxy resin solution;
preparing a coupling agent solution: adjusting the pH value of the remaining half water to 3.8, and then dissolving the weighed coupling agent into the water with the pH value adjusted to prepare a coupling agent solution;
preparing a modified solution: and mixing the epoxy resin solution and the coupling agent solution, and stirring for 30min to obtain the modified liquid.
In this embodiment, the epoxy resin is an EXE-313 type epoxy resin, which is colorless or light yellow transparent viscous liquid, and the chemical structural formula of the EXE-313 type epoxy resin is as follows:
in this example, the coupling agent is silane coupling agent A187 with the chemical name of Y-glycidoxypropyltrimethoxysilane [ C ]12H26O5Si]。
In this embodiment, the aramid fiber is an F-12 aramid fiber, and its molecular structural formula is:
(3) drying the F-12 aramid fiber fabric after one bath: drying the F-12 aramid fiber fabric after one-bath impregnation at 80 ℃, and controlling the water content of the F-12 aramid fiber fabric to be below 5%;
(4) primary high-temperature baking: baking the dried F-12 aramid fiber fabric at the temperature of 200 ℃ for 2 min;
(5) dipping in an RFL resin solution: soaking the F-12 aramid fiber fabric subjected to primary high-temperature baking in an RFL resin solution for 20min at normal temperature, wherein the bath ratio of the F-12 aramid fiber fabric to the RFL resin solution is 1: 20; then rolling uniformly by using a small padder, and adopting three-dipping and four-rolling with the pressure of 0.05 MP; the three-dipping four-rolling is specifically one-dipping one-rolling, one-dipping one-rolling and one-dipping two-rolling.
In this embodiment, the RFL resin solution includes the following components in parts by weight: 100 g of distilled water, 0.40 g of caustic soda, 3.58 g of resorcinol, 5.21 g of formaldehyde, 2.82 g of ammonia water and 82.15 g of butadiene-pyridine latex solution.
In this example, the RFL resin solution was prepared as follows:
preparing an RF solution:
weighing 66.67 g of distilled water and 0.40 g of caustic soda (NaOH) into a reaction tank, and stirring until the distilled water and the caustic soda (NaOH) are completely dissolved; after reacting for 5min, adding 3.58 g of resorcinol, controlling the temperature at 22 ℃, stirring for 30min, weighing 5.21 g of formaldehyde, adding the formaldehyde into a reaction tank, stirring, controlling the temperature at 22 ℃, waiting for 5h, and preparing an RF solution for later use;
preparing an RFL resin solution:
weighing 11.11 g of distilled water, 2.82 g of ammonia water and 82.15 g of butyl-picolatex solution, and adding into a mixing tank; weighing 11.11 g of distilled water, washing the beaker with the weighed butadiene-pyridine latex, and pouring the washed water into the mixing tank; and pouring the prepared RF solution into a mixing tank, washing the RF solution reaction tank by using 11.11 g of distilled water, pouring the washed water into the mixing tank, uniformly stirring, and standing for 30min to obtain the RFL resin solution.
In this example, the ammonia water and the butyl pyridine latex solution are analytically pure.
(6) And (3) secondary high-temperature baking to obtain a finished product: and baking the F-12 aramid fiber fabric impregnated with the RFL resin solution at the temperature of 200 ℃ for 2min to obtain a finished product of the modified F-12 aramid fiber fabric.
Example 2: a modification processing method of a conveyer belt framework material F-12 aramid fiber fabric comprises the following steps: (1) pre-treating; (2) carrying out one-bath treatment by using a modifying solution; (3) drying the aramid fiber fabric after one bath; (4) primary high-temperature baking; (5) dipping RFL resin solution; (6) baking at high temperature for the second time to obtain a finished product; wherein,
(1) pretreatment: cleaning the surface of the F-12 aramid fiber fabric by using ethanol at normal temperature to wash off the surface oiling agent of the F-12 aramid fiber fabric;
(2) carrying out one-bath treatment by using a modifying solution: soaking the pretreated F-12 aramid fiber fabric in a modification solution at normal temperature for 20min, wherein the bath ratio of the F-12 aramid fiber fabric to the modification solution is 1:50, then uniformly rolling by using a small padder, and adopting three-soaking and four-rolling with the pressure of 0.05 MP; the three-dipping four-rolling is specifically one-dipping one-rolling, one-dipping one-rolling and one-dipping two-rolling.
In this embodiment, the modifying solution comprises the following components in grams by weight: 1.54 g of epoxy resin, 3.30 g of coupling agent and 95.16 g of water.
The modified solution is prepared by the following method:
preparing materials: weighing 1.54 g of epoxy resin, 3.30 g of coupling agent and 95.16 g of water according to the following weight g of components;
preparing an epoxy resin solution: adding half of the weighed water into a stirring tank, then adding the weighed epoxy resin into the stirring tank, and stirring until the epoxy resin is completely dissolved in the water to prepare an epoxy resin solution;
preparing a coupling agent solution: adjusting the pH value of the remaining half water to 4.2, and then dissolving the weighed coupling agent into the water with the pH value adjusted to prepare a coupling agent solution;
preparing a modified solution: and mixing the epoxy resin solution and the coupling agent solution, and stirring for 30min to obtain the modified liquid.
In this embodiment, the epoxy resin is an EXE-313 type epoxy resin, which is colorless or light yellow transparent viscous liquid, and the chemical structural formula of the EXE-313 type epoxy resin is as follows:
in this example, the coupling agent is silane coupling agent A187 with the chemical name of Y-glycidoxypropyltrimethoxysilane [ C ]12H26O5Si]。
In this embodiment, the aramid fiber is an F-12 aramid fiber, and its molecular structural formula is:
(3) drying the F-12 aramid fiber fabric after one bath: drying the F-12 aramid fiber fabric after one-bath impregnation at 80 ℃, and controlling the water content of the F-12 aramid fiber fabric to be below 5%;
(4) primary high-temperature baking: baking the dried F-12 aramid fiber fabric at the temperature of 200 ℃ for 2 min;
(5) dipping in an RFL resin solution: soaking the F-12 aramid fiber fabric subjected to primary high-temperature baking in an RFL resin solution for 20min at normal temperature, wherein the bath ratio of the F-12 aramid fiber fabric to the RFL resin solution is 1: 20; then rolling uniformly by using a small padder, and adopting three-dipping and four-rolling with the pressure of 0.05 MP; the three-dipping four-rolling is specifically one-dipping one-rolling, one-dipping one-rolling and one-dipping two-rolling.
In this embodiment, the RFL resin solution includes the following components in parts by weight: 100 g of distilled water, 0.44 g of caustic soda, 3.65 g of resorcinol, 5.38 g of formaldehyde, 2.96 g of ammonia water and 85.36 g of butyl Pix latex solution.
In this example, the RFL resin solution was prepared as follows:
preparing an RF solution:
weighing 66.67 g of distilled water and 0.44 g of caustic soda (NaOH) into a reaction tank, and stirring until the distilled water and the caustic soda (NaOH) are completely dissolved; after reacting for 5min, adding 3.65 g of resorcinol, controlling the temperature at 23 ℃, stirring for 30min, weighing 5.38 g of formaldehyde, adding the formaldehyde into a reaction tank, stirring, controlling the temperature at 28 ℃, waiting for 6h, and preparing an RF solution for later use;
preparing an RFL resin solution:
weighing 11.11 g of distilled water, 2.96 g of ammonia water and 85.36 g of butyl Pivot gum emulsion solution, and adding into a mixing tank; weighing 11.11 g of distilled water, washing the beaker with the weighed butadiene-pyridine latex, and pouring the washed water into the mixing tank; and pouring the prepared RF solution into a mixing tank, washing the RF solution reaction tank by using 11.11 g of distilled water, pouring the washed water into the mixing tank, uniformly stirring, and standing for 30min to obtain the RFL resin solution.
In this example, the ammonia water and the butyl pyridine latex solution are analytically pure.
(6) And (3) secondary high-temperature baking to obtain a finished product: and baking the F-12 aramid fiber fabric impregnated with the RFL resin solution at the temperature of 200 ℃ for 2min to obtain a finished product of the modified F-12 aramid fiber fabric.
Example 3:
firstly, carrying out modification and test experiments on F-12 aramid fiber fabric, which specifically comprises the following steps:
as shown in fig. 1: the F-12 aramid fiber fabric (hereinafter referred to as a test sample 1) subjected to modification treatment by the modification solution in the steps (1) to (4) forms an obvious transparent film on the surface, and the film has a smooth surface and is free from accumulation.
As shown in fig. 2: it can be seen that the surface of the sample 1 is significantly different from that of the sample 1, and the sample 1 is 3810cm-1、2730cm-1、2420cm-1、1920cm-1、1510cm-1A new characteristic peak appears nearby and belongs to the characteristic peak on the silane coupling agent A187, and the new reaction is shown to occur on the surface of the aramid fiber. The test sample 1 is 3800-2000 cm-1、2000～1050cm-1、662cm-1、732cm-1The absorption peak intensity is obviously increased, which indicates that-OH and-NH are on the surface of the fiber2Increased content of-OH, -NH2Can react with hydroxyl, butyl-pyrryl, carboxyl and the like in RFL to increase the adhesive property between the fiber and the RFL resin.
The RFL resin is butadiene-Pipy latex made in China and is special for rubber factories. The modified F-12 aramid fiber fabric obtained after the treatment by the method of the invention (step (1) to step (6)) is called a test sample 2.
TABLE 1F-12 parameters of aramid fiber fabrics as received (plain weave)
TABLE 2 breaking Strength of filaments as received and in test sample 2
Note: the fineness of the F-12 aramid fiber is 2048 dtex; a tester DY-25 universal strength machine; the range is 0-5000N; the standard is GB/T19975-2005 experiment method for tensile property of high-strength fiber filaments, and each sample is tested 10 times and averaged.
TABLE 3 breaking Strength of the fabrics as received and tested in sample 2
Note: the fineness of the F-12 aramid fiber is 2048 dtex. An experimental instrument: the Taiwan high-speed rail universal strength machine GT-AI7000S has a measuring range of 0-20000N; sample size 10 x 2.5 cm; standard Chinlon and Dacron dipped canvas for HG/T2820-1996 conveyer belts; test 3 times and take the average value.
Second, vulcanization molding and test experiment
TABLE 4 vulcanization conditions
After the modified F-12 aramid fiber fabric modified by the method is vulcanized and formed, the fabric needs to be placed for one hour, and then subsequent tests are carried out. The conveyer belt sample obtained by vulcanization molding is hereinafter referred to as a vulcanization sample.
(1) Peeling test
The vulcanized sample was subjected to a test of peel strength by an INSTR0N5565 tensile tester, and the average peel force required was measured by peeling the cover layer (i.e., rubber layer) and the fabric layer (i.e., modified F-12 aramid fiber fabric) of the vulcanized sample at a constant speed by using a tensile tester in accordance with FZ/T13010-1998 synthetic fiber canvas for rubber industry. The experimental result is expressed by a median method, namely the average load on the vulcanized sample per unit length, namely the peel strength, is shown as the symbol S in the formula 2-1, and the average value is obtained by testing each vulcanized sample for three times.
S-average load/width (formula 2-1)
In the formula: s-peel Strength, N/mm
In the experimental process, the size of a vulcanized sample is 10 multiplied by 2.4cm, the S value is required to reach 7.8N/mm by national standard, and the S value is required to reach more than 8N/mm by row standard.
The peel strength index enables evaluation of the adhesion performance between the F-12 aramid fiber fabric and rubber. The higher the peel strength, the better the adhesion of the F-12 aramid fiber fabric to rubber. As the mechanical performance index of the used framework material can basically meet the use requirement of the conveyer belt, a plurality of enterprises mainly test the peeling strength. The test peel strength specimens were formed in a "bar" shape.
The test adopts the standard exceeding rate of peeling to measure the peeling strength exceeding the national standard level.
The peeling out exceeding rate is (actual peeling strength-line standard lowest standard)/line standard lowest standard.
The minimum standard of the normal use peel strength of the conveyer belt specified by the national standard is 7.8N/mm, and the minimum standard of the line standard is 8.0N/mm.
Table 5 results of the test for stripping vulcanized samples.
Remarking:
the method comprises the following steps of (1) performing a gum dipping cloth stripping experiment (the stripping standard is that the average load/width reaches 7.5-8.0N/mm), wherein the lowest stripping strength standard of normal use of the conveyer belt specified by the national standard is 7.8N/mm, and the lowest stripping strength standard of the conveyer belt specified by the national standard is 8.0N/mm.
The used instruments are as follows: a plate vulcanizer, a steel knife and an INSTRON-5565 universal strength machine.
The used standard is as follows: FZ/T13010-1998 rubber industrial synthetic fiber canvas.
Vulcanization experimental conditions: at 150 deg.C for 30 min.
Three tests per sample were averaged.
The data in Table 5 show that the modified F-12 aramid fiber fabric has very good adhesive property with rubber, and can meet the use requirement of a conveyer belt.
As can be seen from FIG. 3, the coating rate of the fabric surface reaches more than 80%, and the stripping effect is good.
(2) Aging test
And (3) putting the vulcanized sample into an oven at 105 ℃ for 72h, taking out and standing for 3h, and testing the stripping strength of the aged sample. The standard used is FZ/T13010-1998 synthetic fiber canvas for rubber industry, and the general industry requires that the stripping strength of the aged fabric reaches the minimum standard (namely 7.5-8.0N/mm) of the stripping strength of the fabric which is not aged. The test results are shown in table 6:
TABLE 6 aged Peel Strength test results for vulcanized samples
As can be seen from the data in Table 6, the peel strength of the vulcanized sample after aging treatment can meet the industrial standard, namely the peel strength after aging is within the range of 7.5-8.0N/mm.
(3) Test for testing strength of vulcanized sample
The tensile strength and the elongation of the fabric are tested by a Taiwan high-speed rail universal strength machine gram T-AI7000S, and a GB/T3690-1994 fabric core conveyor belt strength and elongation determination method is adopted. The test conditions were room temperature, the tensile speed was 100mm/min, the tensile strength and elongation of the vulcanized sample were measured, the single layer was as shown in FIG. 4, the double layer was as shown in FIG. 5, the shape of the sample was as shown in FIG. 6, and the test results were as shown in Table 7.
Table 7 strength test results of vulcanized samples
TABLE 8 flexural fatigue test results of vulcanized samples
Remarking:
the used standard is as follows: GB/T33100 & 2016 dip cord tape bending fatigue test method.
The used instruments are as follows: fatigue tester LSF-II.
Experimental conditions are as follows: and (4) room temperature.
And testing each sample for 3 times and taking an average value. Single-layer core layer fabric with sample size of 40cm multiplied by 2.5cm
The peel strength of the vulcanized sample 1 was not decreased after 10000 times of bending. According to the standard established in the industry, the reduction rate of the peel strength after 20000 times of bending is less than or equal to 30 percent, and the product is qualified. In table 8, the peel strength reduction rate of the vulcanized sample 2 after 20000 times of bending is 18.18%, which is much less than 30%, and meets the industrial standard.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A modification processing method of a conveyer belt framework material F-12 aramid fiber fabric is characterized by comprising the following steps: (1) pre-treating; (2) carrying out one-bath treatment by using a modifying solution; (3) drying the F-12 aramid fiber fabric after one bath; (4) primary high-temperature baking; (5) dipping RFL resin solution; (6) baking at high temperature for the second time to obtain a finished product; wherein,
(1) pretreatment: cleaning the surface of the F-12 aramid fiber fabric by using ethanol at normal temperature to wash off the surface oiling agent of the F-12 aramid fiber fabric;
(2) carrying out one-bath treatment by using a modifying solution: soaking the pretreated F-12 aramid fiber fabric in the modification solution for 20min at normal temperature, then rolling uniformly, and adopting three-soaking and four-rolling with the pressure of 0.05 MP; the modified liquid comprises the following components in parts by weight: 1.46-1.54 g of epoxy resin, 2.87-3.30 g of coupling agent and 95.67-95.16 g of water; the epoxy resin is EXE-313 type epoxy resin; the coupling agent is a silane coupling agent A187;
the modified solution is prepared by the following method:
preparing materials: weighing 1.46-1.54 g of epoxy resin, 2.87-3.30 g of coupling agent and 95.67-95.16 g of water according to the following weight parts;
preparing an epoxy resin solution: adding half of the weighed water into a stirring tank, then adding the weighed epoxy resin into the stirring tank, and stirring until the epoxy resin is completely dissolved in the water to prepare an epoxy resin solution;
preparing a coupling agent solution: adjusting the pH value of the remaining half water to 3.8-4.2, and then dissolving the weighed coupling agent into the water with the pH value adjusted to prepare a coupling agent solution;
preparing a modified solution: mixing the epoxy resin solution and the coupling agent solution, and stirring for 30min to obtain a modified solution;
(3) drying the F-12 aramid fiber fabric after one bath: drying the F-12 aramid fiber fabric after one-bath impregnation at 80 ℃, and controlling the water content of the F-12 aramid fiber fabric to be below 5%;
(4) primary high-temperature baking: baking the dried F-12 aramid fiber fabric at the temperature of 200 ℃ for 2 min;
(5) dipping in an RFL resin solution: soaking the F-12 aramid fiber fabric subjected to primary high-temperature baking in an RFL resin solution at normal temperature for 20min, then rolling uniformly, and adopting three-soaking and four-rolling with the pressure of 0.05 MP; the RFL resin solution comprises the following components in parts by weight: 100 g of distilled water, 0.40-0.44 g of caustic soda, 3.58-3.65 g of resorcinol, 5.21-5.38 g of formaldehyde, 2.82-2.96 g of ammonia water and 82.15-85.36 g of butyl Pix latex solution;
(6) and (3) secondary high-temperature baking to obtain a finished product: and baking the F-12 aramid fiber fabric impregnated with the RFL resin solution at the temperature of 200 ℃ for 2min to obtain a finished product of the modified F-12 aramid fiber fabric.
2. The method for modifying and processing the F-12 aramid fiber fabric serving as the framework material of the conveyor belt according to claim 1, wherein in the step (2), the bath ratio of the F-12 aramid fiber fabric to the modifying liquid is 1: 50.
3. The method for modifying and processing the F-12 aramid fiber fabric as the conveying belt framework material according to claim 1, wherein the RFL resin solution is prepared by the following steps:
preparing an RF solution:
weighing 66.67 g of distilled water and 0.40-0.44 g of caustic soda, adding into a reaction tank, and stirring until the distilled water and the caustic soda are completely dissolved; after reacting for 5min, adding 3.58-3.65 g of resorcinol, controlling the temperature at 22-23 ℃, stirring for 30min, then weighing 5.21-5.38 g of formaldehyde, adding the formaldehyde into a reaction tank, stirring, controlling the temperature at 22-28 ℃, waiting for 5-6 h, and preparing an RF solution for later use;
preparing an RFL resin solution:
weighing 11.11 g of distilled water, 2.82-2.96 g of ammonia water and 82.15-85.36 g of butyl Pix latex solution, and adding into a mixing tank; weighing 11.11 g of distilled water, washing the beaker with the weighed butadiene-pyridine latex, and pouring the washed water into the mixing tank; and pouring the prepared RF solution into a mixing tank, washing the RF solution reaction tank by using 11.11 g of distilled water, pouring the washed water into the mixing tank, uniformly stirring, and standing for 30min to obtain the RFL resin solution.
4. The method for modifying and processing the F-12 aramid fiber fabric of the conveyor belt framework material as claimed in claim 1 or 3, wherein in the step (5), the bath ratio of the F-12 aramid fiber fabric to the RFL resin solution is 1: 20.
5. The modified F-12 aramid fiber fabric prepared by using the modification processing method of the F-12 aramid fiber fabric as the conveyor belt framework material in any one of claims 1 to 4.
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| CN109878974A (en) * | 2019-03-20 | 2019-06-14 | 青岛中维新材料有限公司 | A kind of aramid fiber conveyer belt |
| CN110904691A (en) * | 2019-10-18 | 2020-03-24 | 安徽华烨特种材料有限公司 | Preparation process of organic silicon modified aramid fiber coated fabric |
| CN113981682B (en) * | 2021-10-26 | 2023-09-05 | 泰和新材集团股份有限公司 | Preactivated para-aramid fiber and preparation method thereof |
| CN115613348B (en) * | 2022-10-17 | 2024-01-30 | 太原理工大学 | Surface modification method of polyester fiber fabric, preparation method and application of modified polyester fiber fabric and rubber canvas composite material |
| CN115785359A (en) * | 2022-11-23 | 2023-03-14 | 聚实(上海)新材料有限公司 | Novel modified RF resin emulsion for fiber framework material impregnation liquid RFL and preparation method thereof |
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