阅读说明：本技术 一种高硅氧网片生产工艺 (Production process of high silica mesh ) 是由 贺广东 贺新民 于 2021-08-24 设计创作，主要内容包括：一种高硅氧网片生产工艺,以高硅氧纤维作为主要原材料的网布基布作为坯布制作,包括酸洗、水洗、一次烘干、热烧结、涂胶、二次烘干、浸胶、三次烘干、碳化、切片,本发明提供了一整套生产高硅氧网片的生产工艺,提高了相关产品的生产效率,结合工艺对应的成套设备可以实现整条生产线封闭式生产,减少了生产过程对环境的污染,同时本发明通过系统优化和整体设计,提升了高硅氧网片生产的自动化水平,有利于提高生产效率和产品质量,具有较为显著的社会经济效益。(A high silica net production process, the screen cloth base cloth taking high silica fiber as main raw material is made as the grey cloth, including acid cleaning, water washing, first drying, hot sintering, gumming, second drying, gumming, third drying, carbonizing, slicing, the invention has provided a whole set of production process to produce high silica net, has raised the production efficiency of the relevant products, the complete sets of apparatus that the combination process corresponds can realize the closed production of the whole production line, has reduced the pollution to the environment of the production process, the invention passes systematic optimization and integral design at the same time, has promoted the automation level of the production of high silica net, help to raise production efficiency and product quality, have comparatively apparent social economic benefits.)

1. A high silica mesh production process, regard high silica fiber as the base cloth of screen cloth of the main raw material and make as the grey cloth, characterized by, including acid cleaning, water washing, oven drying once, hot sintering, rubberizing, oven drying twice, gumming, oven drying three times, carbonize, slicing;

pickling, washing, primary drying, hot sintering, gluing and secondary drying to prepare the high silica glass fiber mesh cloth;

gum dipping: coating phenolic resin on the surface of the high silica glass fiber mesh cloth, wherein the gel content is 20-40%; and (3) drying for the third time: heating by using steam, drying at 80-90 ℃, removing the solvent in the resin, and simultaneously curing the resin;

carbonizing: adopting electric heating, controlling the temperature to be 200-400 ℃, carbonizing the phenolic resin coated on the surface of the high silica glass fiber mesh cloth, and improving the heat-resisting temperature of the mesh;

slicing: and slicing the carbonized product according to a preset size to form the high silica mesh.

2. The process for producing a high silicone mesh according to claim 1, wherein the acid washing comprises three steps:

the first step is as follows: preliminary pre-pickling, wherein the temperature of the acid liquor is 22-26 ℃, the concentration of the acid liquor is 5-15%, and the time is controlled for 20-30 minutes;

the second step is that: performing primary hot pickling, wherein the temperature of the acid liquor is controlled to be 60-80 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes;

the third step: performing secondary hot pickling, wherein the temperature of the acid liquor is controlled to be 80-90 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes;

the fourth step: and (3) carrying out third-time hot pickling, wherein the temperature of the acid liquor is controlled to be 90-98 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes.

3. The process for producing a high silicone mesh sheet according to claim 2, wherein the washing step is carried out by washing residual acid remaining in the acid-washed raw fabric to adjust the pH to 6 to 7.

4. The process for producing a high silicone oxide web according to claim 3, wherein the once-drying, the washed raw fabric is dried by a steam ironing roll, and the raw fabric is dried by moisture and ironed.

5. The process for producing a high silicone oxide web according to claim 4, wherein the heat sintering is carried out at a temperature of 500 ℃ to 900 ℃ for 5 minutes to 15 minutes.

6. The process for producing a high silicone mesh according to claim 5, wherein said coating is carried out by coating a surface of a raw fabric with an enhanced surface treatment agent, said enhanced surface treatment agent comprising glacial acetic acid, a film-forming agent, polyurethane, and a resin as main components.

7. The process for producing a high silica web according to claim 6, wherein the secondary drying and steam heating dries and irones the fabric, and simultaneously cures the surface treatment agent to form a high silica glass fiber web.

Technical Field

The invention relates to the field of high silica production processes, and particularly relates to a high silica mesh production process.

Background

The high silica fiber is a short-term high-purity silicon oxide amorphous continuous fiber, and the silicon oxide content of the high silica fiber is 96-98%, the high silica fiber can continuously resist the temperature of 1000 ℃ and can temporarily resist the temperature of 1400 ℃; the finished product mainly comprises continuous yarn, rope belt, sleeve, screen cloth and stitch-bonded product, is mainly applied to 1000-DEG superhigh temperature fire prevention and heat insulation, has single fiber diameter larger than 5 microns, does not contain any asbestos or ceramic cotton, and is completely harmless to body health. The high silica mesh is deeply processed based on a high silica fiber production technology, and no related complete process is available in the industry at present to realize continuous production of the high silica mesh.

Disclosure of Invention

The invention aims to provide a high silica mesh production process, which realizes the purpose of realizing continuous production of high silica meshes by a complete process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a production process of a high silica mesh sheet is characterized in that a mesh fabric base fabric using high silica fibers as main raw materials is used as a grey fabric, and the production process comprises acid washing, water washing, primary drying, thermal sintering, gluing, secondary drying, gum dipping, tertiary drying, carbonization and slicing.

Further, the acid washing comprises three steps: the first step is as follows: preliminary pre-pickling, and a second step: primary hot pickling, and a third step: secondary hot pickling, and the fourth step: and (5) carrying out hot acid pickling for three times.

The main purpose of acid cleaning is to remove impurities in the high silica fiber base cloth and improve the content of silicon oxide, and the content of silicon oxide after acid cleaning can reach 96-98%.

Further, the washing step is to wash residual acid in the acid-washed grey cloth and adjust the pH value to 6-7.

Further, the gray fabric is dried once, the washed gray fabric is dried through a steam ironing roller, and the moisture of the gray fabric is dried and ironed.

Further, the thermal sintering is carried out at the temperature of 500-900 ℃ for 5-15 minutes. After the pickling, impurity in the cellosilk is washed, and the cellosilk surface can form the sunken of size greatly, and the diameter of whole cellosilk is inhomogeneous, and at this moment fiber structure is loose, influences holistic intensity, and after the sintering, through the sintering of high temperature, with cellosilk heating to molten state, the cellosilk produces linear shrink, eliminates the cellosilk and goes up the uneven sunken of distribution, improves cloth cover physical properties, promotes holistic intensity.

Further, the surface of the grey fabric is coated with an enhanced surface treatment agent, and the enhanced surface treatment agent mainly comprises glacial acetic acid, a film forming agent, polyurethane and resin.

Further, the secondary drying and the steam heating are carried out, the water of the grey cloth is dried and ironed, and meanwhile, the surface treating agent is solidified into a film.

Gum dipping: coating phenolic resin on the surface of the high silica glass fiber mesh cloth, wherein the gel content is 20-40%;

and (3) drying for the third time: heating by using steam, drying at 80-90 ℃, removing the solvent in the resin, and simultaneously curing the resin;

carbonizing: adopting electric heating, controlling the temperature to be 200-400 ℃, carbonizing the phenolic resin coated on the surface of the high silica glass fiber mesh cloth, and improving the heat-resisting temperature of the mesh;

slicing: and slicing the carbonized product according to a preset size to form the high silica mesh.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a continuous production process of a whole set of mature high silica mesh, which realizes continuous production of the high silica mesh and has the production efficiency of 4-8 m/min; pickling, sintering, removing impurities to improve the physical properties of the fiber, so that the content of silicon oxide is up to 96%; the high-temperature resistance of the high silica mesh can be further improved through gum dipping and carbonization; the closed production of the whole production line can be realized by combining the complete equipment corresponding to the process, so that the pollution to the environment in the production process is reduced; meanwhile, the invention improves the automation level of the production of the high silica mesh sheet through system optimization and integral design, is beneficial to improving the production efficiency and the product quality, and has more remarkable social and economic benefits.

Drawings

FIG. 1 is a flow chart of the production process of the present invention.

Detailed Description

The invention is further described below with reference to fig. 1.

A production process of a high silica mesh sheet is characterized in that a mesh fabric base fabric using high silica fibers as main raw materials is used as a grey fabric, and the production process comprises acid washing, water washing, primary drying, thermal sintering, gluing, secondary drying, gum dipping, tertiary drying, carbonization and slicing.

And pickling, washing, primary drying, hot sintering, gluing and secondary drying to obtain the high silica glass fiber mesh cloth.

The acid washing comprises three steps:

the first step is as follows: preliminary pre-pickling, wherein the temperature of the acid liquor is 22-26 ℃, the concentration of the acid liquor is 5-15%, and the time is controlled for 20-30 minutes;

the second step is that: performing primary hot pickling, wherein the temperature of the acid liquor is controlled to be 60-80 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes;

the third step: performing secondary hot pickling, wherein the temperature of the acid liquor is controlled to be 80-90 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes;

the fourth step: and (3) carrying out third-time hot pickling, wherein the temperature of the acid liquor is controlled to be 90-98 ℃, the concentration of the acid liquor is unchanged, and the time is controlled to be 60-90 minutes.

In the specific implementation process, the pickling process corresponds equipment and adopts suspension type pickling bath, and this kind of pickling bath belongs to intermittent type nature pickling, will hang grey cloth on the stores pylon promptly, then the pickling bath is put into to the heap, and grey cloth after the pickling directly washes, washing mainly takes two kinds of modes, one kind is to hoist grey cloth again, puts into the rinsing bath, and the second kind is to emit the acidizing fluid in the pickling bath originally and collect, then pours into the washing liquid in the pickling bath originally again, carries out the washing, specifically decides according to the actual production condition.

The pickling process can be optimized by using a continuous pickling tank, the pickling tank adopts a reel type, the grey cloth is directly wound on a rotating shaft, the grey cloth is driven to flow in the pickling tank through the rotation of the rotating shaft, the pickling is realized, a water washing tank can be directly added behind the pickling tank, the grey cloth is automatically fed into the washing tank after being washed by the water, and the automatic production is realized. The rinsing bath under the scheme can directly use the same type of pickling equipment, and the acid liquor is replaced by proper rinsing liquid.

By adopting the pickling equipment, the whole set of equipment of pickling, water washing, primary drying, hot sintering, gluing, secondary drying, gum dipping, tertiary drying, carbonization and slicing can be automatically connected.

The main function of the acid wash is to wash out the non-silica components of the fiber by acid leaching to a silica content of > 96% in the glass component.

The grey cloth is dried once after being washed by water, the cloth surface of the grey cloth is dried and ironed by the primary drying, and a steam ironing roller is mainly adopted to heat the grey cloth at the temperature of 80-90 ℃.

After the high silica glass fiber cloth is subjected to acid leaching, water washing and drying, the content of SiO2 in the glass is more than 96 percent, the high silica glass fiber is formed, the fiber structure is loose, linear shrinkage is generated by heat treatment at the temperature of 500-900 ℃, the time is 5-15 minutes, and the physical properties of the cloth cover are improved.

The adhesive is characterized in that the surface of the grey cloth is coated with an enhanced surface treatment agent, and the main components of the enhanced surface treatment agent comprise glacial acetic acid, a film forming agent, polyurethane and resin. The surface of the high silica glass fiber mesh cloth is coated with the enhanced surface treating agent which can be well combined with the matrix phenolic resin, and meanwhile, the high silica glass fiber mesh cloth has good mechanical strength and surface quality and is convenient to process and form. The fiber can be prevented from absorbing moisture, the formation of microcracks can be prevented, and the strength of the glass fiber can be repaired to a certain degree; meanwhile, the surface treatment has an effect of serving as a bridge (coupling) between glass and organic matters to ensure that the fibers are well combined with the organic matters.

And (3) drying for the second time, heating by steam, drying and ironing the water content of the grey cloth, and simultaneously solidifying the surface treating agent into a film to form the high silica glass fiber mesh cloth.

Gum dipping: coating phenolic resin on the surface of the high silica glass fiber mesh cloth, wherein the gel content is 20-40%.

And (3) drying for the third time: heating with steam at 80-90 deg.c to eliminate solvent from the resin while curing the resin.

Carbonizing: the electric heating is adopted, the temperature is required to be controlled to be 200-400 ℃, the phenolic resin coated on the surface of the high silica glass fiber mesh cloth is carbonized, and the heat-resistant temperature of the mesh is improved.

Slicing: and slicing the carbonized product according to a preset size to form the high silica mesh. The organic matter content of the finished mesh is 20-40%.

The utility model discloses a drying machine, including the pickling machine, the pickling machine is equipped with the winding wheel, the winding wheel is equipped with the winding wheel, and the winding wheel, the winding wheel is equipped with the winding wheel, and the winding wheel, and the winding wheel, the winding wheel.

The above description is only for the preferred embodiment of the present invention, and the shown orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, the terms "disposed", "installed", "connected", "fixed", etc. should be understood in a broad sense, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.