CN112440475A - Preparation process and preparation device of phenolic cotton cloth laminated board - Google Patents
Preparation process and preparation device of phenolic cotton cloth laminated board Download PDFInfo
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- CN112440475A CN112440475A CN202011142349.0A CN202011142349A CN112440475A CN 112440475 A CN112440475 A CN 112440475A CN 202011142349 A CN202011142349 A CN 202011142349A CN 112440475 A CN112440475 A CN 112440475A
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- cotton cloth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
- B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/10—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with phenol
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a preparation process and a preparation device of a phenolic cotton cloth laminated board, wherein the preparation process sequentially comprises cotton cloth conveying, gluing, cotton cloth superposing, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging; the glue solution during gluing comprises the following components in parts by weight: 40-50.8 parts of composite phenolic resin, 33-42.3 parts of asbestos, 2.7-3.5 parts of mica powder, 6.8-7.3 parts of polycaprolactam, 10-15 parts of graphite, 10-23 parts of chlorine-containing fiber, 10-37 parts of poly-p-hydroxybenzoate, 5-7 parts of glass fiber, 6.3-10 parts of hexamethylenetetramine, 2.5-5.6 parts of oleic acid and 8-33 parts of magnesium oxide. The invention can solve the problems of uneven thickness and low impact strength of the existing phenolic cotton cloth laminated board.
Description
Technical Field
The invention relates to a preparation process and a preparation device of a laminated board, in particular to a preparation process and a preparation device of a phenolic cotton cloth laminated board.
Background
The phenolic cotton cloth laminated board is made by soaking cotton cloth with phenolic resin, drying and hot-pressing, and is generally used for parts of insulating structures in machinery, motors and electrical equipment.
The existing preparation devices for phenolic cotton cloth laminated plates on the market are easy to cause uneven thickness of the laminated plates in the hot press forming process, the produced phenolic cotton laminated plates are low in impact strength, the laminated plates can be used in some low-power motors and electrical equipment, but cannot be used in some high-power motors or electrical equipment with high impact strength in a large scale, and the application range of the phenolic cotton laminated plates is limited to a certain extent.
Disclosure of Invention
The invention aims to provide a preparation process and a preparation device of a phenolic cotton cloth laminated board, which are used for solving the problems of uneven thickness and low impact strength of the existing phenolic cotton cloth laminated boards in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a phenolic cotton cloth laminated board is characterized by comprising the following steps: the method comprises the steps of cotton cloth conveying, gluing, cotton cloth overlapping, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging in sequence;
the glue solution during gluing comprises the following components in parts by weight:
the preparation device used in the preparation process of the phenolic cotton cloth laminated board sequentially comprises a cotton cloth conveying mechanism, a gluing mechanism, a conveying mechanism, a first heating mechanism, a first pressing mechanism, a cutting mechanism, a second heating mechanism and a second pressing mechanism from left to right;
the first pressing mechanism comprises a pressing mechanism frame, a first heating mechanism is arranged on the left side of the pressing mechanism frame, a pressing cylinder is arranged downwards at the top of the pressing mechanism frame, the piston rod end of the pressing cylinder is connected with a pressing block, a plurality of telescopic rods are symmetrically arranged on the pressing block, the piston end of each telescopic rod is connected to the corresponding pressing block, the fixed end of each telescopic rod is fixed at the top of the pressing mechanism frame, a spring frame is arranged on the periphery of the piston end of the corresponding pressing cylinder, the spring frame is connected to the pressing mechanism frame, a buffer plate is fixedly connected to the piston end of the corresponding pressing cylinder and located inside the spring frame, a plurality of buffer springs are connected between the buffer plate and the spring frame, limiting plates are respectively arranged on the front side and the rear side of the bottom of the pressing block, and limiting cylinders are, the limiting cylinder controls the movement of the limiting plate;
the first heating mechanism and the second heating mechanism have the same structure, and the first pressing mechanism and the second pressing mechanism have the same structure;
the temperature in the first heating mechanism is 150 ℃, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 6-8 Mpa;
the temperature in the second heating mechanism is 155-165 ℃, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa.
Preferably, the preparation steps of the composite phenolic resin are as follows:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating paraxylene filled in a reaction kettle to 88-92 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 10-15 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 116-125 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
when the composite phenolic resin is prepared, the mass of p-xylene added is 5.1-5.4 times of that of phenol;
and the mass of the phenolic resin added in the step 8 is 3-4 times of that of the reactant.
Preferably, in the step 8, the phenolic resin comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol.
Preferably, the phenolic resin is prepared by the following steps:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to keep the pH value within the range of 1.9-2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, stopping heating when the temperature is 85-90 ℃, and opening a condenser after reactants are just boiled;
and 4, step 4: and (3) introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain the phenolic resin after the reaction is finished.
Preferably, cotton conveying mechanism includes the conveying frame, be provided with a plurality of cotton unreeling rollers in the conveying frame, the output of every cotton unwrapping wire roller all is provided with the cotton transfer roller, the cotton unreels the roller and all installs in the conveying frame with the cotton transfer roller.
Preferably, the rubber coating mechanism includes the spreading machine body, be provided with multiunit cotton conveying roller on the spreading machine body, be provided with glue solution rabbling mechanism between two sets of cotton conveying rollers, glue solution rabbling mechanism can be with compound phenolic resin stirring, the output side of spreading machine body is provided with the glue solution and paints the mechanism, including the multiunit in the glue solution paints the mechanism, every group paints and is provided with two rows of relative smearing brushes on the subassembly, and two rows of smearing brushes scribble the glue solution on with the cotton evenly.
Preferably, the conveying mechanism comprises a mechanism frame, a plurality of waist circular holes are arranged on the front side and the rear side of the mechanism frame in parallel, a conveying roller mounting frame is arranged in the mechanism frame, conveying roller mounting seats are symmetrically arranged on the front side and the rear side of the conveying roller mounting frame, the conveying roller mounting seat is rotatably connected with a plurality of first conveying rollers, a plurality of second conveying rollers are correspondingly arranged above the first conveying rollers, two ends of the center shafts of the second conveying rollers are respectively connected with a positioning plate, the top of the positioning plate is connected with an adjusting cylinder, the top of the positioning plate is matched with the piston rod end of the adjusting cylinder, the adjusting cylinder is fixed at the top of the mechanism frame, two ends of a center shaft of the second conveying rollers are positioned in corresponding waist circular holes on the mechanism frame, and the second conveying rollers move up and down along with the expansion and contraction of a piston rod of the cylinder to adjust the distance between the second conveying rollers and the second conveying rollers;
the right side of first transfer roller is provided with a plurality of third transfer rollers, and a plurality of first transfer rollers cooperate with a plurality of third transfer rollers through the conveyer belt, all installs driving motor in the epaxial of a plurality of third transfer rollers.
Preferably, the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism are sequentially arranged between the first conveying rollers and the third conveying rollers, and the conveying belts between the first conveying rollers and the third conveying rollers pass through the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism.
Preferably, the cutting mechanism comprises a cutting mechanism frame, a hydraulic cutting knife is arranged downwards at the top of the cutting mechanism frame, and the hydraulic cutting knife can cut the laminated board.
Preferably, the first conveying roller, the second conveying roller and the third conveying roller are identical in structure.
Compared with the prior art, the invention provides a preparation process and a preparation device of a phenolic cotton cloth laminated board, and the preparation process and the preparation device have the following beneficial effects:
1. according to the preparation process and the preparation device of the phenolic cotton cloth laminated board, the resin used for gluing breaks the traditional limitation, and the composite phenolic resin is added into the phenolic resin, so that the impact strength of the phenolic cotton cloth laminated board is improved at the early stage without losing the viscosity of the resin;
2. according to the preparation process and the preparation device of the phenolic cotton cloth laminated board, glue solution during gluing is obtained by adding a certain amount of polycaprolactam to match with high-strength materials such as asbestos, mica powder and glass fiber after adding composite phenolic resin into phenolic resin, so that the impact strength of the phenolic cotton cloth laminated board is ensured;
3. according to the preparation process and the preparation device of the phenolic cotton cloth laminated board, a hot pressing mode that the first pressing is carried out immediately after the first heating and the second pressing is carried out immediately after the second heating is adopted, the temperature of the two times of heating is from low to high, and the pressure intensity of the two times of pressing is from small to large is adopted, so that the defect that the thickness of the phenolic cotton cloth laminated board generated by the one-time hot pressing is not uniform is avoided;
4. according to the preparation process and the preparation device of the phenolic cotton cloth laminated board, the pressing block arranged on the pressing device is matched with the limiting plate to press the laminated board when the laminated board is pressed, and the limiting plate is adjustable through the limiting cylinder, so that the uniform stress of each part of the laminated board in the pressing process is ensured, and the uniform thickness of the phenolic cotton cloth laminated board is ensured;
in conclusion, the phenolic cotton cloth laminated board prepared by the invention has uniform thickness and high impact strength, and can be used in some harsh environments requiring high strength.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:
FIG. 1 is a schematic structural view of a device for preparing a phenolic cotton cloth laminated board;
FIG. 2 is a schematic structural view of the frame of the pressing mechanism of FIG. 1 from another perspective;
in the figure: a transfer rack 100; a cotton cloth unwinding roller 101; a cotton cloth conveying roller 102; a glue spreader body 200; a cotton cloth feed roller 201; a glue solution stirring mechanism 202; a glue solution smearing mechanism 203; an application assembly 204; a daubing brush 205; a transfer mechanism 300; a mechanism frame 301; a transfer roller mounting bracket 302; a transfer roller mount 303; a first transfer roller 304; a second conveyance roller 305; positioning plate 306; an adjusting cylinder 307; a third conveyance roller 308; a hold-down mechanism frame 400; a hold-down cylinder 401; a buffer plate 401.1; a compression block 402; a telescopic rod 403; a spring frame 404; a limiting plate 405; a spacing cylinder 406; a buffer spring 404.1; a first heating mechanism 500; a cutting mechanism frame 600; a hydraulic cutting knife 601.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
The invention provides a technical scheme that: a preparation process of a phenolic cotton cloth laminated board sequentially comprises cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution during gluing comprises the following components in parts by weight:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating paraxylene filled in a reaction kettle to 88-92 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 10-15 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 116-125 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
when the composite phenolic resin is prepared, the mass of p-xylene added is 5.1-5.4 times of that of phenol;
the mass of the phenolic resin added in the step 8 is 3-4 times of that of the reactant;
the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to keep the pH value within the range of 1.9-2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, stopping heating when the temperature is 85-90 ℃, and opening a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
referring to fig. 1 and 2, a device for preparing a phenolic cotton cloth laminated board sequentially comprises a cotton cloth conveying mechanism, a glue coating mechanism, a conveying mechanism, a first heating mechanism, a first pressing mechanism, a cutting mechanism, a second heating mechanism and a second pressing mechanism from left to right;
the cotton cloth conveying mechanism is adopted during conveying of cotton cloth and comprises a conveying rack 100, a plurality of cotton cloth unwinding rollers 101 are arranged in the conveying rack 100, a cotton cloth conveying roller 102 is arranged at the output end of each cotton cloth unwinding roller 101, and the cotton cloth unwinding rollers 101 and the cotton cloth conveying rollers 102 are both mounted on the conveying rack 100;
a glue spreading mechanism is adopted during glue spreading, the glue spreading mechanism comprises a glue spreading machine body 200, composite phenolic resin is filled in the glue spreading machine body 200, a plurality of groups of cotton cloth conveying rollers 201 are arranged on the glue spreading machine body 200, a glue solution stirring mechanism 202 is arranged between the two groups of cotton cloth conveying rollers 201, the glue solution stirring mechanism 202 can uniformly stir the composite phenolic resin, a glue solution smearing mechanism 203 is arranged on the output side of the glue spreading machine body 200, a plurality of groups of smearing components 204 are arranged in the glue solution smearing mechanism 203, two opposite rows of smearing brushes 205 are arranged on each group of smearing components 204, and the glue solution on the cotton cloth is smeared uniformly by the two rows of smearing brushes 205;
the cotton cloth coincide is carried out to the multi-disc cotton cloth behind the rubber coating, and the multi-disc cotton cloth is in the same place by the coincide according to the order, passes through transport mechanism 300 behind the cotton coincide, transport mechanism 300 includes mechanism frame 301, a plurality of waist round holes have all been seted up to both sides in parallel mutually around mechanism frame 301, be provided with transfer roller mounting bracket 302 in the mechanism frame 301, bilateral symmetry is provided with transfer roller mount pad 303 around the transfer roller mounting bracket 302, the last swivelling joint of transfer roller mount pad 303 has a plurality of first transfer rollers 304, and the top of a plurality of first transfer rollers 304 corresponds and is provided with a plurality of second transfer rollers 305, and the both ends of a plurality of second transfer rollers axis 305 are connected with locating plate 306 respectively, the top of locating plate 306 is connected with adjusting cylinder 307, and the top cooperation of locating plate 306 is at the tailpiece of the piston, two ends of the center shaft of the plurality of second conveying rollers 305 are located in corresponding kidney-round holes on the mechanism frame 301, and along with the extension and contraction of the piston rod of the air cylinder, the plurality of second conveying rollers 305 move up and down to adjust the distance between the plurality of second conveying rollers 305;
a plurality of third conveying rollers 308 are arranged on the right side of the first conveying roller 304, the first conveying rollers 304 are matched with the third conveying rollers 308 through conveying belts, and driving motors are arranged on the center shafts of the third conveying rollers 308;
the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism are sequentially arranged between the plurality of first conveying rollers 304 and the plurality of third conveying rollers 308, and the conveying belts between the plurality of first conveying rollers 304 and the plurality of third conveying rollers 308 pass through the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism;
the first-time pressing mechanism comprises a pressing mechanism frame 400, a first-time heating mechanism 500 is arranged on the left side of the pressing mechanism frame 400, a pressing cylinder 401 is downwards arranged at the top of the pressing mechanism frame 400, a piston rod end of the pressing cylinder 401 is connected with a pressing block 402, a plurality of telescopic rods 403 are symmetrically arranged on the pressing block 402, a piston end of each telescopic rod 403 is connected to the corresponding pressing block 402, a fixed end of each telescopic rod 403 is fixed at the top of the pressing mechanism frame 400, a spring frame 404 is arranged on the periphery of the piston end of the corresponding pressing cylinder 401, the spring frames 404 are connected to the pressing mechanism frame 400, a buffer plate 401.1 is fixedly connected to the piston end of the corresponding pressing cylinder 401, the buffer plate 401.1 is located inside the spring frame 404, a plurality of buffer springs 404.1 are connected between the buffer plate 401.1 and the spring frame 404, and limiting plates 405 are respectively arranged on the front side, a limiting air cylinder 406 is arranged outside the limiting plate 405, and the limiting air cylinder 406 controls the movement of the limiting plate 405;
the cutting mechanism comprises a cutting mechanism frame 600, a hydraulic cutting knife 601 is arranged downwards at the top of the cutting mechanism frame 600, and the hydraulic cutting knife 601 can cut the laminated board;
the first conveying roller 304, the second conveying roller 305 and the third conveying roller 308 have the same structure;
the first heating mechanism and the second heating mechanism have the same structure, and the first pressing mechanism and the second pressing mechanism have the same structure;
the temperature in the first heating mechanism is 150 ℃, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 6-8 Mpa;
the temperature in the second heating mechanism is 155-165 ℃, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa;
example 1
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution during gluing comprises the following components in parts by weight:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating p-xylene filled in a reaction kettle to 92 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 12 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 120 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
the mass of p-xylene added in the preparation of the composite phenolic resin is 5.1 times of that of phenol;
the mass of the phenolic resin added in the step 8 is 3 times of that of the reactant;
the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 85 ℃, stopping heating, and starting a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
the first heating adopts a first heating mechanism, the temperature in the first heating mechanism is 150 ℃, the first pressing adopts a first pressing mechanism, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 6 Mpa;
the second heating adopts a second heating mechanism, the temperature in the second heating mechanism is 155 ℃, the second pressing adopts a second pressing mechanism, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa;
example 2
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution during gluing comprises the following components in parts by weight:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating p-xylene filled in a reaction kettle to 90 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 15 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 125 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
the mass of p-xylene added in the preparation of the composite phenolic resin is 5.4 times of that of phenol;
the mass of the phenolic resin added in the step 8 is 4 times of that of the reactant;
the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 1.9;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 90 ℃, stopping heating, and opening a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
the first heating adopts a first heating mechanism, the temperature in the first heating mechanism is 150 ℃, the first pressing adopts a first pressing mechanism, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 8 Mpa;
the second heating adopts a second heating mechanism, the temperature in the second heating mechanism is 165 ℃, the second pressing adopts a second pressing mechanism, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa;
example 3
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution during gluing comprises the following components in parts by weight:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating p-xylene filled in a reaction kettle to 88 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 14 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 116 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
the mass of p-xylene added in the preparation of the composite phenolic resin is 5.2 times of that of phenol;
the mass of the phenolic resin added in the step 8 is 3.4 times of that of the reactant;
the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 2.2;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 88 ℃, stopping heating, and starting a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
the first heating adopts a first heating mechanism, the temperature in the first heating mechanism is 150 ℃, the first pressing adopts a first pressing mechanism, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 6.4 Mpa;
the second heating adopts a second heating mechanism, the temperature in the second heating mechanism is 160 ℃, the second pressing adopts a second pressing mechanism, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa;
example 4
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution during gluing comprises the following components in parts by weight:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating p-xylene filled in a reaction kettle to 90 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 10 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 120 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
the mass of p-xylene added in the preparation of the composite phenolic resin is 5.3 times of that of phenol;
the mass of the phenolic resin added in the step 8 is 3.6 times of that of the reactant;
the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 2.1;
and step 3: introducing water vapor into the reaction kettle, heating to carry out the reaction, stopping heating when the temperature is 86 ℃, and opening a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
the temperature in the first heating mechanism is 150 ℃, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 7.6 Mpa;
the temperature in the second heating mechanism is 158 ℃, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa;
comparative example 1
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth overlapping, hot pressing, cutting, cooling and packaging;
the glue solution used for gluing comprises the following components in parts by weight:
the phenolic resin in the glue solution component comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 85 ℃, stopping heating, and starting a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
comparative example 2
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth overlapping, hot pressing, cutting, cooling and packaging;
the glue solution used for gluing comprises the following components in parts by weight:
the phenolic resin in the glue solution component comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 1.9;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 90 ℃, stopping heating, and opening a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
comparative example 3
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution used for gluing comprises the following components in parts by weight:
the phenolic resin in the glue solution component comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 85 ℃, stopping heating, and starting a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
comparative example 4
The preparation method of the phenolic cotton cloth laminated board sequentially comprises the steps of cotton cloth conveying, gluing, cotton cloth laminating, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging;
the glue solution used for gluing comprises the following components in parts by weight:
the phenolic resin in the glue solution component comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol;
the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to 1.9;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, heating to 90 ℃, stopping heating, and opening a condenser after reactants are just boiled;
and 4, step 4: introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain phenolic resin after the reaction is finished;
some of the mechanical properties of the phenolic cotton cloth laminates prepared using the processes of examples 1-4 and comparative examples 1-4 are as follows:
from the data in the above table it can be seen that: in the embodiments 1 to 4, the preparation process of the laminated board, including cotton cloth conveying, gluing, cotton cloth superposing, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging, is adopted, and the glue solution is prepared by adding polycaprolactam to the composite phenolic resin and matching with high-strength materials such as asbestos, mica powder, glass fiber and the like, so that the mechanical strength of the laminated board is improved on the premise of ensuring the resin performance; the prior preparation processes of the laminated board of the comparative examples 1 and 2, including cotton cloth conveying, gluing, cotton cloth overlapping, hot pressing, cutting, cooling and packaging, are adopted, the glue solution is prepared by synthesizing phenolic resin by using the prior formula in the preparation process and then compounding epoxy resin, toluene and ethanol to prepare the glue solution for gluing, so that the produced laminated board has low mechanical strength and poor impact resistance; comparative example 3 and comparative example 4 both used cotton cloth transfer, gluing, cotton cloth folding, first heating, first pressing, cutting, second heating, second pressing, cooling, laminate preparation processes of packaging, the formula and formulation process of the glue solution of comparative example 3 was the same as comparative example 1, the formula and formulation process of the glue solution of comparative example 4 was the same as comparative example 2, and it can be seen that: comparative example 3 is improved in mechanical strength as compared with comparative example 1, and comparative example 4 is improved in mechanical strength as compared with comparative example 2, but the effect of improving the mechanical properties of the laminated board of comparative example 3 and comparative example 4 is less significant than those of examples 1 to 4 as a whole, so that it can be found that the mechanical strength of the phenolic cotton laminated board produced by using the processes of examples 1 to 4 is higher than that of the phenolic cotton laminated board produced by using the processes of comparative examples 1 to 4 from the difference in mechanical properties of the phenolic cotton laminated board produced by using the above examples and comparative examples.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A preparation process of a phenolic cotton cloth laminated board is characterized by comprising the following steps: the method comprises the steps of cotton cloth conveying, gluing, cotton cloth overlapping, first heating, first pressing, cutting, second heating, second pressing, cooling and packaging in sequence;
the glue solution during gluing comprises the following components in parts by weight:
the preparation device used in the preparation process of the phenolic cotton cloth laminated board sequentially comprises a cotton cloth conveying mechanism, a gluing mechanism, a conveying mechanism, a first heating mechanism, a first pressing mechanism, a cutting mechanism, a second heating mechanism and a second pressing mechanism from left to right;
the first-time pressing mechanism comprises a pressing mechanism frame (400), a first-time heating mechanism (500) is arranged on the left side of the pressing mechanism frame (400), a pressing cylinder (401) is arranged downwards on the top of the pressing mechanism frame (400), a pressing block (402) is connected to the piston rod end of the pressing cylinder (401), a plurality of telescopic rods (403) are symmetrically arranged on the pressing block (402), the piston end of each telescopic rod (403) is connected to the pressing block (402), the fixed end of each telescopic rod (403) is fixed to the top of the pressing mechanism frame (400), a spring frame (404) is arranged on the periphery of the piston end of the pressing cylinder (401), the spring frame (404) is connected to the pressing mechanism frame (400), a buffer plate (401.1) is fixedly connected to the piston end of the pressing cylinder (401), and the buffer plate (401.1) is located inside the spring frame (404), a plurality of buffer springs (404.1) are connected between the buffer plate (401.1) and the spring frame (404), limiting plates (405) are respectively arranged on the front side and the rear side of the bottom of the pressing block (402), a limiting cylinder (406) is arranged on the outer side of each limiting plate (405), and the limiting cylinder (406) controls the movement of each limiting plate (405);
the first heating mechanism and the second heating mechanism have the same structure, and the first pressing mechanism and the second pressing mechanism have the same structure;
the temperature in the first heating mechanism is 150 ℃, and the pressure of the first pressing mechanism acting on the phenolic cotton cloth laminated board is 6-8 Mpa;
the temperature in the second heating mechanism is 155-165 ℃, and the pressure of the second pressing mechanism acting on the phenolic cotton cloth laminated board is 10 Mpa.
2. The process for preparing a phenolic cotton cloth laminate according to claim 1, wherein:
the preparation method of the composite phenolic resin comprises the following steps:
step 1: weighing p-xylene and putting the p-xylene and the p-xylene into a reaction kettle according to needs;
step 2: heating paraxylene filled in a reaction kettle to 88-92 ℃;
and step 3: introducing dry chlorine into the reaction kettle at the speed of 600 ml per minute, starting an ultraviolet lamp for irradiation, and stopping introducing the chlorine after continuously reacting for 10-15 hours;
and 4, step 4: introducing dry air into the reaction kettle, and flushing hydrogen chloride and chlorine in the reaction kettle;
and 5: cooling the reactants in the reaction kettle and filtering;
step 6: washing the filtered reactant with cold water until no acidity exists, and then washing with cold ethanol to obtain dichloro-p-toluene;
and 7: adding phenol into the obtained dichloro-p-toluene, heating to 116-125 ℃, stirring, gradually heating to 140 ℃, keeping for 2 hours, and cooling to obtain a reactant;
and 8: adding phenolic resin into the reactant obtained in the step 7 to obtain composite phenolic resin;
when the composite phenolic resin is prepared, the mass of p-xylene added is 5.1-5.4 times of that of phenol;
and the mass of the phenolic resin added in the step 8 is 3-4 times of that of the reactant.
3. The process for preparing a phenolic cotton cloth laminate according to claim 2, wherein: the phenolic resin in the step 8 comprises the following synthetic components in parts by weight:
the purity of each component of the phenolic resin is as follows: 100% of phenol, 36% of formaldehyde, 25% of hydrochloric acid and 95% of ethanol.
4. The process of making a phenolic cotton cloth laminate according to claim 3, wherein: the preparation steps of the phenolic resin are as follows:
step 1: pouring the measured phenol and formaldehyde aqueous solution into a reaction kettle, and continuously stirring for 5 minutes to uniformly mix the phenol and formaldehyde aqueous solution;
step 2: adjusting the pH value of the mixture in the reaction kettle to keep the pH value within the range of 1.9-2.3;
and step 3: introducing water vapor into the reaction kettle, heating to enable the reaction to be carried out, stopping heating when the temperature is 85-90 ℃, and opening a condenser after reactants are just boiled;
and 4, step 4: and (3) introducing cooling water into the reaction kettle, stirring after 20 minutes, adding hydrochloric acid, and continuing to react to obtain the phenolic resin after the reaction is finished.
5. The process for preparing a phenolic cotton cloth laminate according to claim 1, wherein: cotton cloth transport mechanism is including conveying frame (100), be provided with a plurality of cotton and unreel roller (101) in conveying frame (100), the output of every cotton unwrapping wire roller (101) all is provided with cotton transfer roller (102), cotton unreels roller (101) and all installs on conveying frame (100) with cotton transfer roller (102).
6. The process for preparing a phenolic cotton cloth laminate according to claim 1, wherein: the rubber coating mechanism includes spreading machine body (200), be provided with multiunit cotton conveying roller (201) on spreading machine body (200), be provided with glue solution rabbling mechanism (202) between two sets of cotton conveying roller (201), glue solution rabbling mechanism (202) can be with compound phenolic resin stirring, the output side of spreading machine body (200) is provided with the glue solution and paints mechanism (203), subassembly (204) is paintd including the multiunit in glue solution paints mechanism (203), and every group paints and is provided with two relative rows of paintings (205) on subassembly (204), and two rows of paintings (205) paint the glue solution on the cotton evenly.
7. The process for preparing a phenolic cotton cloth laminate according to claim 1, wherein: the conveying mechanism comprises a mechanism frame (301), a plurality of waist round holes are formed in the front side and the rear side of the mechanism frame (301) in a mutually parallel mode, conveying roller mounting frames (302) are arranged in the mechanism frame (301), conveying roller mounting seats (303) are symmetrically arranged on the front side and the rear side of the conveying roller mounting frames (302), a plurality of first conveying rollers (304) are connected to the conveying roller mounting seats (303) in a rotating mode, a plurality of second conveying rollers (305) are correspondingly arranged above the plurality of first conveying rollers (304), positioning plates (306) are connected to the two ends of the center shafts of the plurality of second conveying rollers (305) respectively, adjusting cylinders (307) are connected to the tops of the positioning plates (306), the tops of the positioning plates (306) are matched with the ends of piston rods of the adjusting cylinders (307), the adjusting cylinders (307) are fixed to the tops of the mechanism frame (301), the two ends of the center shafts of the plurality of the second conveying rollers (305) are located in, the plurality of second conveying rollers (305) move up and down along with the expansion and contraction of the piston rod of the air cylinder to adjust the distance between the plurality of second conveying rollers (305);
the right side of first transfer roller (304) is provided with a plurality of third transfer rollers (308), and a plurality of first transfer rollers (304) cooperate through the conveyer belt with a plurality of third transfer rollers (308), all installs driving motor in the epaxial of a plurality of third transfer rollers (308).
8. The process of making a phenolic cotton cloth laminate according to claim 7, wherein: the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism are sequentially arranged between the plurality of first conveying rollers (304) and the plurality of third conveying rollers (308), and the conveying belts between the plurality of first conveying rollers (304) and the plurality of third conveying rollers (308) penetrate through the first heating mechanism, the first pressing mechanism, the cutting mechanism, the second heating mechanism and the second pressing mechanism.
9. The process for preparing a phenolic cotton cloth laminate according to claim 1, wherein: the cutting mechanism comprises a cutting mechanism frame (600), a hydraulic cutting knife (601) is arranged on the top of the cutting mechanism frame (600) downwards, and the hydraulic cutting knife (601) can cut the laminated board.
10. The process of making a phenolic cotton cloth laminate according to claim 7, wherein: the first conveying roller (304), the second conveying roller (305) and the third conveying roller (308) are identical in structure.
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