CN114657806A - Thickened insulating cardboard and production method thereof - Google Patents

Abstract

The invention belongs to the field of paperboard production, in particular to a thickened insulating paperboard and a production method thereof, aiming at the problems that the existing insulating paperboard has weak interlayer bonding force, low tensile strength and poor waterproof and fireproof performance during use. , the following scheme is now proposed, wherein the thickened insulating paperboard includes 50-70 parts of unbleached kraft softwood pulp, 20-30 parts of water, 0.1-0.6 parts of polyethylene glycol, 1-5 parts of polyacrylamide, acrylic acid-2 parts ‑1‑6 parts of copolymer of ethylhexyl ester and styrene, 1‑10 parts of oxidized starch, 1‑3 parts of tetrasodium pyrophosphate, 0.1‑0.5 parts of formaldehyde, 0.3‑0.6 parts of p-nitrophenol, 1 part of waterproof film ‑5 servings. The thickened insulating paperboard of the present invention has stronger interlayer bonding force, higher tensile strength, lower electrical conductivity, better waterproof and fireproof performance in use, and can avoid cracking during long-term use, and has a longer service life.

Description

Thickened insulating cardboard and production method thereof

technical field

The invention relates to the technical field of paperboard production, in particular to a thickened insulating paperboard and a production method thereof.

Background technique

The general term for insulating cardboard in the electrical industry. Air insulating cardboard must also have high tightness and withstand voltage strength. It is made of unbleached kraft wood pulp as raw material and is made by viscous beating. It is used in motors, power meters, etc. Usually there are air-insulated cardboard and oil-insulated cardboard, etc. Insulating cardboard is divided into two types: flat cardboard and reel cardboard. The thickness of more than 0.5mm is flat cardboard, and the thickness of 0.5mm and below is reel cardboard. The raw material of insulating cardboard is Unbleached kraft wood pulp and cotton pulp are pulped separately. Purified water must be used for production. The pipes and pulp pumps must be cleaned and washed, and impurities containing conductive components must not be mixed. copy;

However, the interlayer bonding force of the existing insulating paperboard is weak, the tensile strength is low, and the waterproof and fireproof performance during use is poor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a thickened insulating paperboard and a production method thereof in order to solve the shortcomings existing in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions:

A thickened insulating paperboard, comprising the following raw materials by weight: 50-70 parts of unbleached sulfate softwood pulp, 20-30 parts of water, 0.1-0.6 parts of polyethylene glycol, 1-5 parts of polyacrylamide, and acrylic acid -1-6 parts of copolymer of 2-ethylhexyl ester and styrene, 1-10 parts of oxidized starch, 1-3 parts of tetrasodium pyrophosphate, 0.1-0.5 parts of formaldehyde, 0.3-0.6 parts of p-nitrophenol, waterproof 1-5 parts of film, 1-5 parts of glass fiber mesh, 1-5 parts of fireproof mud, 1-5 parts of grid carbon fiber reinforced plate, 1-5 parts of fireproof coating and 1-5 parts of UV wear-resistant coating 5 servings.

Preferably, it includes the following raw materials by weight: 50 parts of unbleached kraft softwood pulp, 20 parts of water, 0.1 part of polyethylene glycol, 1 part of polyacrylamide, copolymerization of 2-ethylhexyl acrylate and styrene 1 part of carbon fiber, 1 part of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber reinforcement 1 part of ribs, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present invention also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in order by the following parts by weight: 50-70 parts of unbleached kraft softwood pulp, 20-30 parts of water, 0.1-0.6 parts of polyethylene glycol, 1-5 parts of polyacrylamide, acrylic acid-2- 1-6 parts of copolymer of ethylhexyl ester and styrene, 1-10 parts of oxidized starch, 1-3 parts of tetrasodium pyrophosphate, 0.1-0.5 parts of formaldehyde, 0.3-0.6 parts of p-nitrophenol, waterproof film 1- 5 parts, 1-5 parts of glass fiber mesh cloth, 1-5 parts of fireproof mud, 1-5 parts of grid carbon fiber reinforced plate, 1-5 parts of fireproof coating and 1-5 parts of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

Preferably, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

Preferably, in the S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

Preferably, in the S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9 MPa.

Preferably, in the S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh is 1.5-2.5 mm.

Compared with the prior art, the beneficial effects of the present invention are:

The thickened insulating paperboard of the present invention has strong interlayer bonding force, high tensile strength, low electrical conductivity, good waterproof and fireproof performance during use, and can avoid cracking during long-term use, and has a longer service life.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Example 1

A thickened insulating paperboard, comprising the following raw materials by weight: 50 parts of unbleached sulfate softwood pulp, 20 parts of water, 0.1 part of polyethylene glycol, 1 part of polyacrylamide, 2-ethylhexyl acrylate and 1 part of styrene copolymer, 1 part of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, net 1 part of lattice carbon fiber reinforced plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present embodiment also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in order by the following parts by weight: 50 parts of unbleached kraft softwood pulp, 20 parts of water, 0.1 part of polyethylene glycol, 1 part of polyacrylamide, a mixture of 2-ethylhexyl acrylate and styrene 1 part of copolymer, 1 part of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber 1 part of rib plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

In this embodiment, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

In this embodiment, in S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

In this embodiment, in S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9MPa.

In this embodiment, in S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh cloth is 1.5-2.5 mm.

Table 1 Data before and after purification of production water

project Conductivity Water resistivity ordinary water 25μs/cm 16.8MΩ.cm purified water 0.8μs/cm 11.3MΩ.cm

Embodiment 2

A thickened insulating paperboard, comprising the following raw materials by weight: 55 parts of unbleached sulfate softwood pulp, 25 parts of water, 0.2 parts of polyethylene glycol, 2 parts of polyacrylamide, acrylic acid-2-ethylhexyl resin and 2 parts of styrene copolymer, 2 parts of oxidized starch, 2 parts of tetrasodium pyrophosphate, 0.2 parts of formaldehyde, 0.5 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, net 1 part of lattice carbon fiber reinforced plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present embodiment also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in order by the following parts by weight: 55 parts of unbleached kraft softwood pulp, 25 parts of water, 0.2 parts of polyethylene glycol, 2 parts of polyacrylamide, a mixture of 2-ethylhexyl acrylate and styrene 2 parts of copolymer, 2 parts of oxidized starch, 2 parts of tetrasodium pyrophosphate, 0.2 parts of formaldehyde, 0.5 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber 1 part of rib plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

In this embodiment, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

In this embodiment, in S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

In this embodiment, in S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9MPa.

In this embodiment, in S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh cloth is 1.5-2.5 mm.

Embodiment 3

A thickened insulating paperboard, comprising the following raw materials by weight: 60 parts of unbleached sulfate softwood pulp, 25 parts of water, 0.2 parts of polyethylene glycol, 3 parts of polyacrylamide, acrylic acid-2-ethylhexyl resin and 3 parts of styrene copolymer, 3 parts of oxidized starch, 3 parts of tetrasodium pyrophosphate, 0.2 parts of formaldehyde, 0.2 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, net 1 part of lattice carbon fiber reinforced plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present embodiment also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in sequence according to the following parts by weight: 60 parts of unbleached kraft softwood pulp, 25 parts of water, 0.2 part of polyethylene glycol, 3 parts of polyacrylamide, a mixture of 2-ethylhexyl acrylate and styrene 3 parts of copolymer, 3 parts of oxidized starch, 3 parts of tetrasodium pyrophosphate, 0.2 parts of formaldehyde, 0.2 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber 1 part of rib plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

In this embodiment, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

In this embodiment, in S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

In this embodiment, in S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9MPa.

In this embodiment, in S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh cloth is 1.5-2.5 mm.

Embodiment 4

A thickened insulating paperboard, comprising the following raw materials by weight: 60 parts of unbleached sulfate softwood pulp, 25 parts of water, 0.3 parts of polyethylene glycol, 4 parts of polyacrylamide, acrylic acid-2-ethylhexyl resin and 3 parts of styrene copolymer, 4 parts of oxidized starch, 3 parts of tetrasodium pyrophosphate, 0.4 parts of formaldehyde, 0.4 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, net 1 part of lattice carbon fiber reinforced plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present embodiment also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in order by the following parts by weight: 60 parts of unbleached kraft softwood pulp, 25 parts of water, 0.3 parts of polyethylene glycol, 4 parts of polyacrylamide, a mixture of 2-ethylhexyl acrylate and styrene 3 parts of copolymer, 4 parts of oxidized starch, 3 parts of tetrasodium pyrophosphate, 0.4 parts of formaldehyde, 0.4 parts of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber 1 part of rib plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

In this embodiment, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

In this embodiment, in S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

In this embodiment, in S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9MPa.

In this embodiment, in S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh cloth is 1.5-2.5 mm.

Embodiment 5

A thickened insulating paperboard, comprising the following raw materials by weight: 60 parts of unbleached sulfate softwood pulp, 30 parts of water, 0.3 parts of polyethylene glycol, 5 parts of polyacrylamide, acrylic acid-2-ethylhexyl resin and 5 parts of styrene copolymer, 10 parts of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, net 1 part of lattice carbon fiber reinforced plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating.

The present embodiment also proposes a method for producing thickened insulating cardboard, comprising the following steps:

S1: Weigh the raw materials in order by the following parts by weight: 60 parts of unbleached kraft softwood pulp, 30 parts of water, 0.3 parts of polyethylene glycol, 5 parts of polyacrylamide, a mixture of 2-ethylhexyl acrylate and styrene 5 parts of copolymer, 10 parts of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of waterproof film, 1 part of glass fiber mesh, 1 part of fireproof mud, mesh carbon fiber 1 part of rib plate, 1 part of fireproof coating and 1 part of UV wear-resistant coating;

S2: The water described in S1 is sent into the filter box for primary filtration, and the large-particle impurities in the water are filtered, and then the water after the primary filtration is sent to the softening water equipment for softening, and the softened water is sent to reverse osmosis. And in the water purifier, water molecules and ionic mineral elements pass through the reverse osmosis membrane, and most of the inorganic salts, organic substances, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, so that the permeated Purified water and impermeable concentrated water are strictly separated to obtain purified water. The purified water can reduce the salt content, effectively remove various impurities in the water, and reduce the conductive ions in the water, thereby reducing the conductivity and improving the effluent. resistivity;

S3: The unbleached kraft softwood pulp described in S1 is sent to a pulper for crushing to obtain crushed pulp, and then the crushed pulp is sent to a pulper for beating. Acrylamide, the copolymer of acrylic acid-2-ethylhexyl and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol are put into the beater at the same time for stirring, and then the purified water described in S2 is added Stir together in the beater, and then send the beaten pulp to the paper machine for processing into semi-finished products. During the processing of the paper machine, the air flotation machine is used to recover the fine fibers, and then sent to the pulper for further processing. , to obtain wet paper, which can increase the content of fine fibers in the pulp, which can improve the strength of insulating cardboard and improve the strength of wet paper sheets;

S4: The wet paper described in S3 is sent into the conveyor for conveying, and the conveyor sends the wet paper into the hot press for hot pressing to obtain insulating cardboard;

S5: The insulating cardboard described in S4 is sent to the processing table, and the two sides of the insulating cardboard are respectively pasted and connected to the waterproof film, and the glass fiber mesh cloth is pasted and connected on the two waterproof films. Apply fireproof mud on top, install grid-like carbon fiber reinforced rib plates on the surface of the two fire-proof mud, and finally spray the surface of the two grid-like carbon fiber reinforced rib plates with fireproof coating and UV wear-resistant coating to obtain a thickening. Insulating cardboard.

In this embodiment, in S3, the pulping time of the pulper is 30-40 minutes, and the crushing speed in the pulper is 8000-12000 r/min.

In this embodiment, in S3, the beating time of the pulper is 40-60 minutes, and the grinding speed in the pulper is 4000-6000 r/min.

In this embodiment, in S4, the working temperature of the hot press is 130°C-180°C, and the pressure is 0.2-0.9MPa.

In this embodiment, in S5, the thickness of the waterproof film is 0.3-0.6 mm, and the thickness of the glass fiber mesh cloth is 1.5-2.5 mm.

The tensile strength, electrical conductivity and electrical strength of the existing products and the products of this embodiment are tested by testing equipment, and the test results are recorded;

tensile strength Conductivity Electric strength Existing Products 105 4% 46 Products of this program 146 1.5% 49

The results show that the tensile strength, electrical conductivity and electrical strength of the thickened insulating paperboard prepared by the invention are all good.

Compared with the prior art, the technical progress obtained by the present invention is: the thickened insulating paperboard of the present invention has stronger interlayer bonding force, higher tensile strength, lower electrical conductivity, better waterproof and fireproof performance during use, and can be used for a long time. The use can also avoid cracking and have a longer service life.

Claims (8)

1. The thickened insulating paperboard is characterized by comprising the following raw materials in parts by weight: 50-70 parts of unbleached sulfate softwood pulp, 20-30 parts of water, 0.1-0.6 part of polyethylene glycol, 1-5 parts of polyacrylamide, 1-6 parts of a copolymer of acrylic acid-2-ethyl hexyl ester and styrene, 1-10 parts of oxidized starch, 1-3 parts of tetrasodium pyrophosphate, 0.1-0.5 part of formaldehyde, 0.3-0.6 part of paranitrophenol, 1-5 parts of a waterproof film, 1-5 parts of glass fiber mesh cloth, 1-5 parts of fire-proof mud, 1-5 parts of a mesh-shaped carbon fiber reinforcing rib plate, 1-5 parts of a fire-proof coating and 1-5 parts of a UV wear-resistant coating.

2. The thickened insulating paperboard according to claim 1, comprising the following raw materials in parts by weight: 50 parts of unbleached sulfate softwood pulp, 20 parts of water, 0.1 part of polyethylene glycol, 1 part of polyacrylamide, 1 part of a copolymer of acrylic acid-2-ethylhexyl ester and styrene, 1 part of oxidized starch, 1 part of tetrasodium pyrophosphate, 0.1 part of formaldehyde, 0.3 part of p-nitrophenol, 1 part of a waterproof film, 1 part of glass fiber mesh cloth, 1 part of fire-proof mud, 1 part of a latticed carbon fiber reinforced rib plate, 1 part of a fire-proof coating and 1 part of a UV wear-resistant coating.

3. The production method of the thickened insulating paperboard is characterized by comprising the following steps:

s1: weighing the following raw materials in parts by weight: 50-70 parts of unbleached sulfate softwood pulp, 20-30 parts of water, 0.1-0.6 part of polyethylene glycol, 1-5 parts of polyacrylamide, 1-6 parts of a copolymer of acrylic acid-2-ethyl hexyl ester and styrene, 1-10 parts of oxidized starch, 1-3 parts of tetrasodium pyrophosphate, 0.1-0.5 part of formaldehyde, 0.3-0.6 part of paranitrophenol, 1-5 parts of a waterproof film, 1-5 parts of glass fiber mesh cloth, 1-5 parts of fire-proof mud, 1-5 parts of a mesh-shaped carbon fiber reinforcing rib plate, 1-5 parts of a fire-proof coating and 1-5 parts of a UV wear-resistant coating;

s2: the water described in S1 is sent into a filter box for primary filtration, large-particle impurities in the water are filtered, the primarily filtered water is conveyed into water softening equipment for softening, the softened water is sent into a reverse osmosis and water purifying machine again, water molecules and ionic mineral elements pass through the reverse osmosis membrane, most inorganic salts, organic matters, bacteria, viruses and the like dissolved in the water cannot permeate through the reverse osmosis membrane, so that the permeated pure water and the concentrated water which cannot permeate through the reverse osmosis membrane are strictly separated, purified water is obtained, the salt content of the purified water can be reduced, various impurities in the water are effectively removed, conductive ions in the water are reduced, the conductivity is reduced, and the resistivity of the effluent water is also improved;

s3: sending the unbleached sulfate softwood pulp described in S1 into a pulper for smashing to obtain smashed pulp, sending the smashed pulp into the pulper for pulping, simultaneously adding polyethylene glycol, polyacrylamide, a copolymer of acrylic acid-2-ethyl hexyl ester and styrene, oxidized starch, tetrasodium pyrophosphate, formaldehyde and p-nitrophenol into the pulper for stirring, adding the purified water described in S2 into the pulper for stirring, then sending the pulped pulp into a paper machine for processing into a semi-finished product, recovering fine fibers by using an air flotation machine in the paper machine processing process, sending the fine fibers into the pulper for continuous processing to obtain wet paper, increasing the content of the fine fibers in the pulp, improving the strength of an insulating paperboard and improving the strength of a high-humidity paper sheet;

s4: conveying the wet paper of the S3 into a conveyor for conveying, and conveying the wet paper into a hot press by the conveyor for hot pressing to obtain an insulating paperboard;

s5: and S4, feeding the insulating paperboard into a processing table, respectively sticking the two sides of the insulating paperboard with connection waterproof films, sticking connection glass fiber gridding cloth on the two waterproof films, coating fireproof mud on the two glass fiber gridding cloths, installing latticed carbon fiber reinforcing rib plates on the surfaces of the two fireproof mud, and finally spraying fireproof coatings and UV (ultraviolet) wear-resistant coatings on the surfaces of the two latticed carbon fiber reinforcing rib plates to obtain the thickened insulating paperboard.

4. The method as claimed in claim 3, wherein in S3, the pulping time of the pulper is 30-40 min, and the crushing speed in the pulper is 8000-.

5. The method as claimed in claim 3, wherein in S3, the beating time of the beater is 40-60 minutes, and the crushing speed in the pulper is 4000-6000 r/min.

6. The method for producing the thickened insulating paperboard as claimed in claim 3, wherein in S4, the working temperature of the hot press is 130-180 ℃, and the pressure is 0.2-0.9 MPa.

7. The method for producing a thickened insulating paperboard as claimed in claim 3, wherein in S5, the waterproof film has a thickness of 0.3-0.6mm, and the fiberglass mesh fabric has a thickness of 1.5-2.5 mm.

8. The method for producing the thickened insulating paperboard according to claim 3, wherein the thickness of the grid-shaped carbon fiber reinforcing rib is 3.5-4.5mm, and the thickness of the UV wear-resistant coating is 0.4-0.8 mm.