Preparation method of novel thermal insulation glass fiber composite fabric

Abstract

The application provides a novel glass fiber composite fabric for thermal insulation and a preparation method thereof, and belongs to the technical field of thermal insulation materials. The application first prepares a glue solution, coats one side of two glass fiber cloths with the glue solution respectively, then pastes the sides coated with the glue solution of the two glass fiber cloths and sequentially passes through pressing and heating curing to obtain the novel glass fiber composite fabric for thermal insulation. The obtained novel glass fiber composite fabric for thermal insulation has no aero-gel falling, can be curled for convenient coating, has good effects of temperature resistance, aging resistance and acid and alkali corrosion resistance, and the preparation method is simple and can realize continuous production, and the thickness is controllable and suitable for thermal insulation of various types of pipelines and containers.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of thermal insulation materials, and particularly relates to a preparation method of a novel glass fiber composite fabric for thermal insulation. BACKGROUND

[0002] With the increasing requirements of the state for energy saving and emission reduction and environmental protection and the increasing heat of building thermal insulation in China, the compulsory implementation of building energy-saving thermal insulation materials, the stable growth of the demand for energy-saving thermal insulation materials, the market prospect of building thermal insulation materials and the price will also make a great progress. In particular, some emerging technologies and materials are favored by the market and users. The prospect of the energy-saving thermal insulation material industry is unlimited. The thermal insulation of pipelines needs to be conveniently coated, has a certain tensile strength, is resistant to aging, acid and alkali corrosion.

[0003] At present, the plate made of glass fiber thermal insulation material cannot be curled, and the glass fiber thermal insulation material that can be curled will have aerogel spilling when the material is bent or folded, affecting the thermal insulation effect, and the material has poor tensile effect, is easy to be loose, has poor corrosion resistance, light resistance and aging resistance, and the container impregnation method is used in the preparation process, which is too complicated and cannot be continuously produced. Therefore, improving the mechanical properties, thermal insulation capacity and production method of the glass fiber thermal insulation material is the key to meet the market needs. SUMMARY

[0004] Therefore, the application aims to provide a preparation method of a novel glass fiber composite fabric for thermal insulation, the aerogel loaded on the obtained composite fabric does not fall off, has good flexibility and can be curled for convenient coating, has good temperature resistance, aging resistance and acid and alkali corrosion resistance, and the preparation method is simple and can be continuously produced.

[0005] In order to achieve the above-mentioned purpose, the application provides the following technical scheme:

[0006] The application provides a preparation method of a novel glass fiber composite fabric for thermal insulation, comprising the following steps:

[0007] One side of each of two glass fiber cloths is coated with a glue solution, and then the two glass fiber cloths are pasted together at the side coated with the glue solution and sequentially subjected to pressing and heating and curing to obtain a novel glass fiber composite fabric for thermal insulation.

[0008] The glue solution is composed of the following raw materials in parts by weight: aerogel powder 15-25 parts and silica gel 75-85 parts.

[0009] Preferably, the glass fiber cloth is EWR200 glass fiber cloth, EWR400 glass fiber cloth, EWR600 glass fiber cloth or EWR800 glass fiber cloth.

[0010] Preferably, the thickness of the glass fiber cloth is 0.1-1mm.

[0011] Preferably, the thickness of the coating glue solution is 0.4-5mm.

[0012] Preferably, the glass fiber cloth is attached with an isolation film below, and the isolation film is a PE bearing film or a PP bearing film.

[0013] Preferably, the temperature of the heating curing is 50-60℃, and the curing time is 3-20min.

[0014] Preferably, the silica gel is composed of the following raw materials in parts by weight: vinyl silicone oil 80-110 parts, hydrogen-containing silicone oil 1-3 parts.

[0015] Preferably, the vinyl silicone oil contains a platinum catalyst, and the content of the platinum catalyst is 3-5ppm in terms of Pt.

[0016] Preferably, the aerogel powder is a silica aerogel powder, a zirconia aerogel powder or an alumina aerogel powder.

[0017] The application also provides a new type of glass fiber composite fabric for thermal insulation.

[0018] The application also provides a new type of glass fiber composite fabric for thermal insulation.

[0019] Beneficial technical effects: the application first prepares a glue solution, coats one side of two glass fiber cloths with the glue solution, attaches the two glass fiber cloths with the glue solution on one side, and then sequentially passes through pressing and heating curing to obtain a new type of glass fiber composite fabric for thermal insulation. The upper and lower two layers of glass fiber cloths are coated with a certain thickness of aerogel glue solution after passing through the glue tank, and the two layers are superimposed to form an aerogel sandwich structure with a certain thickness in the middle. After curing, a glass fiber composite fabric with thermal insulation and heat insulation effects is formed. The formed product is flexible, and the thickness can be designed according to needs. Therefore, the new type of glass fiber composite fabric for thermal insulation aerogel does not fall off, can be curled for convenient packaging, has good temperature resistance, aging resistance and acid and alkali corrosion resistance, and the preparation method is simple and can be continuously produced. The thickness is controllable and suitable for various types of pipe and container thermal insulation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Process flow chart for preparing a new type of glass fiber composite fabric for thermal insulation DETAILED DESCRIPTION

[0021] The application provides a preparation method of a new type of glass fiber composite fabric for thermal insulation, which comprises the following steps:

[0022] One side of two glass fiber cloths is coated with glue solution, and then the two glass fiber cloths are pasted together and sequentially pressed and heated to solidify, thereby obtaining the new type of glass fiber composite fabric for thermal insulation.

[0023] In the present application, the glue solution raw material is preferably composed of the following raw materials by weight: aerogel powder 15-25 parts, silica gel 75-85 parts, more preferably aerogel powder 18-23 parts, silica gel 77-82 parts.

[0024] In the present application, the silica gel is preferably composed of the following raw materials by weight: vinyl silicone oil 80-110 parts, hydrogen-containing silicone oil 1-3 parts, more preferably vinyl silicone oil 85-105 parts, hydrogen-containing silicone oil 1.5-2.5 parts.

[0025] In the present application, the platinum catalyst is contained in the vinyl silicone oil, and the content of the platinum catalyst is preferably 3-5 ppm, more preferably 4 ppm, in terms of Pt.

[0026] In the present application, the aerogel powder is preferably silica aerogel powder, zirconia aerogel powder or alumina aerogel powder, more preferably silica aerogel powder or alumina aerogel powder.

[0027] In the present application, one side of two glass fiber cloths is coated with glue solution.

[0028] In the present application, the glass fiber cloth is preferably EWR200 glass fiber cloth, EWR400 glass fiber cloth, EWR600 glass fiber cloth or EWR800 glass fiber cloth, more preferably EWR400 glass fiber cloth.

[0029] In the present application, the thickness of the glass fiber cloth is preferably 0.15-0.8 mm, more preferably 0.15-0.6 mm.

[0030] In the present application, the thickness of the glue solution coating is preferably 0.4-5 mm, more preferably 0.6-2 mm.

[0031] In the present application, the step of coating the glue solution is preferably as follows: the glue solution is injected into upper and lower glue grooves, and then the two glass fiber cloths are simultaneously passed through the upper and lower glue grooves to coat the glue solution.

[0032] In the present application, the glue groove is provided with a scraper, and the scraper has a gap with the bottom of the glue groove. The scraper in the glue groove can be adjusted so that the gap between the scraper and the bottom of the glue groove is controllable, thereby making the thickness of the glue solution controllable and the glue solution layer in the middle of the composite fabric meet different requirements.

[0033] In the present application, the glass fiber cloth is attached with a separation film below, which is preferably a PE bearing film or a PP bearing film, more preferably a PE bearing film.

[0034] The separation film in the present application can prevent the glass fiber cloth coated with glue solution from dripping, thus preventing waste and maintaining the cleanliness of the equipment.

[0035] After the two glass fiber cloths are coated with glue solution, the two glass fiber cloths are attached on one side coated with glue solution and then pass through the pressing and heating curing in sequence.

[0036] In the present application, the attachment is preferably completed by a guide roller, and the pressing is preferably completed by a pressing roller.

[0037] In the present application, the two glass fiber cloths coated with glue solution are simultaneously pulled by the guide roller to attach the glass fiber cloths coated with glue solution on one side, that is, the attachment is simultaneously performed immediately after the coating of glue solution is completed. After the attachment, the two glass fiber cloths further combine to form a sandwich structure of glass fiber cloth-glue-glass fiber cloth by entering the pressing roller, and the thickness of the composite fabric is adjusted by adjusting the gap of the pressing roller. The pressure during pressing should not be too large to prevent the glue solution from being squeezed out, and only the distance of the pressing roller needs to be adjusted according to the set thickness.

[0038] In the present application, the temperature of the heating curing is preferably 50-60℃, more preferably 55℃, and the curing time is 3-20min, more preferably 5-15min.

[0039] In the present application, the sandwich structure of glass fiber cloth-glue-glass fiber cloth is cured by heating, so that the glue layer is not only formed in the gap of the glass fiber cloth, but also formed independently. The glue layer is connected with the glue in the gap of the glass fiber cloth, and the combination is more firm and flexible, so that the glue will not spill when the shape is changed, and the whole is not loose.

[0040] The present application also provides a new type of glass fiber composite fabric for thermal insulation.

[0041] In order to better understand the present application, the content of the present application is further illustrated by the following examples, but the content of the present application is not limited to the following examples.

[0042] Example 1

[0043] Preparation of glue solution: 100 parts of vinyl silicone oil containing platinum catalyst 3.5ppm and 2 parts of hydrogen-containing silicone oil were weighed by weight parts to prepare a silica gel solution; 20 parts of aerogel powder and 80 parts of silica gel solution were weighed by weight parts, and then poured into a kneader for uniform kneading, and then vacuumized for use.

[0044] Preparation of glass fiber composite fabric:

[0045] The prepared glue solution is injected into the upper and lower glue grooves, the gap between the upper scraper and the bottom of the glue groove is set to 0.45 mm, the gap between the lower scraper and the bottom of the glue groove is set to 0.65 mm, then two EWR400 glass fiber fabrics are adhered to the PE bearing film below, and then the glue solution is coated through the upper and lower glue grooves respectively; the two EWR400 glass fiber fabrics coated with glue solution pass through the guide rollers respectively, so that one side of the glue solution is adhered, and after the adhesion is completed, the thickness is pressed to 1.0 mm by the pressing roller, and immediately sent into the curing chamber through the guide roller, and cured at 55℃ for 10 minutes, to obtain the new glass fiber composite fabric for thermal insulation.

[0046] Example 2

[0047] Preparation of glue solution: 80 parts of vinyl silicone oil containing platinum gold catalyst 3 ppm and 1 part of hydrogen-containing silicone oil are weighed by weight parts to prepare a silica gel solution; 18 parts of aerogel powder and 82 parts of silica gel solution are weighed by weight parts, and then poured into a kneader for uniform kneading, and vacuumized for standby.

[0048] Preparation of glass fiber composite fabric:

[0049] The prepared glue solution is injected into the upper and lower glue grooves, the gap between the upper scraper and the bottom of the glue groove is set to 0.60 mm, the gap between the lower scraper and the bottom of the glue groove is set to 0.85 mm, then two EWR600 glass fiber fabrics are adhered to the PP bearing film below, and then the glue solution is coated through the upper and lower glue grooves respectively; the two EWR600 glass fiber fabrics coated with glue solution pass through the guide rollers respectively, so that one side of the glue solution is adhered, and after the adhesion is completed, the thickness is pressed to 1.4 mm by the pressing roller, and immediately sent into the curing chamber through the guide roller, and cured at 50℃ for 10 minutes, to obtain the new glass fiber composite fabric for thermal insulation.

[0050] Example 3

[0051] Preparation of glue solution: 110 parts of vinyl silicone oil containing platinum gold catalyst 5 ppm and 3 parts of hydrogen-containing silicone oil are weighed by weight parts to prepare a silica gel solution; 23 parts of aerogel powder and 77 parts of silica gel solution are weighed by weight parts, and then poured into a kneader for uniform kneading, and vacuumized for standby.

[0052] Preparation of glass fiber composite fabric:

[0053] The prepared glue solution is injected into the upper and lower glue grooves, the gap between the upper scraper and the bottom of the glue groove is set to 0.80 mm, the gap between the lower scraper and the bottom of the glue groove is set to 1.15 mm, then two EWR200 glass fiber fabrics are adhered to the PP bearing film below, and then the glue solution is coated through the upper and lower glue grooves respectively; the two EWR200 glass fiber fabrics coated with glue solution are adhered to each other through the guide rollers, and then the thickness is pressed to 1.8 mm through the pressing roller, immediately sent into the curing chamber through the guide roller, and cured at 60℃ for 12 min, to obtain the new glass fiber composite fabric for thermal insulation.

[0054] Example 4

[0055] Preparation of glue solution: 98 parts of vinyl silicone oil containing 4 ppm of platinum gold catalyst and 2 parts of hydrogen-containing silicone oil are weighed by weight parts to prepare a silica gel solution; 15 parts of aerogel powder and 75 parts of silica gel solution are weighed by weight parts, and then poured into a kneader for uniform kneading, and then vacuumized for use.

[0056] Preparation of glass fiber composite fabric:

[0057] The prepared glue solution is injected into the upper and lower glue grooves, the gap between the upper scraper and the bottom of the glue groove is set to 1.0 mm, the gap between the lower scraper and the bottom of the glue groove is set to 1.6 mm, then two EWR800 glass fiber fabrics are adhered to the PE bearing film below, and then the glue solution is coated through the upper and lower glue grooves respectively; the two EWR800 glass fiber fabrics coated with glue solution are adhered to each other through the guide rollers, and then the thickness is pressed to 2.5 mm through the pressing roller, immediately sent into the curing chamber through the guide roller, and cured at 55℃ for 15 min, to obtain the new glass fiber composite fabric for thermal insulation.

[0058] Experimental example 1

[0059] The commercial glass fiber thermal insulation material and the new glass fiber composite fabric for thermal insulation prepared in examples 1-4 are tested for performance.

[0060]

[0061] Experimental example 2

[0062] The commercially available glass fiber thermal insulation material and the new thermal insulation glass fiber composite fabric prepared in Examples 1-4 were wound on a cylindrical rod with a diameter of 10 cm to calculate the amount of fiber dropped, specifically, a commercially available glass fiber thermal insulation material with a length of 100 cm and a width of 40 cm and the new thermal insulation glass fiber composite fabric prepared in Examples 1-4 were completely wound on a cylindrical rod, then unwound and wound in the opposite direction, and this was repeated 5 times, then the dropped fibers and glue were weighed.

[0063]

[0064]

[0065] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for producing a glass fiber composite fabric for thermal insulation, characterized by, The method comprises the following steps: One side of two glass fiber cloths is coated with glue solution, and then the two glass fiber cloths are pasted together and sequentially pressed and heated to solidify, thereby obtaining the glass fiber composite fabric for thermal insulation; The glue solution is composed of the following raw materials in parts by weight: aerogel powder 15-25 parts, silica gel 75-85 parts; The glass fiber cloth is EWR200 glass fiber cloth, EWR400 glass fiber cloth, EWR600 glass fiber cloth or EWR800 glass fiber cloth; The thickness of the glass fiber cloth is 0.1-1mm; The thickness of the glue solution is 0.4-5mm.

2. The method according to any one of claim 1, characterized in that, The glass fiber cloth is pasted with a separation film below, and the separation film is a PE bearing film or a PP bearing film.

3. The method of claim 1, wherein, The temperature of the heating solidification is 50-60℃, and the solidification time is 3-20min.

4. The method of claim 1, wherein, The silica gel is composed of the following raw materials in parts by weight: vinyl silicone oil 80-110 parts, hydrogen-containing silicone oil 1-3 parts.

5. The method of claim 4, wherein, The vinyl silicone oil contains platinum catalyst, and the content of the platinum catalyst is 3-5ppm in terms of Pt.

6. The method of claim 1, wherein, The aerogel powder is silica aerogel powder, zirconia aerogel powder or alumina aerogel powder.

7. The glass fiber composite fabric for thermal insulation prepared by the method of any one of claims 1-6.

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