阅读说明：本技术 一种煤焦油气用橡胶密封膜及制备方法 (Rubber sealing film for coal tar gas and preparation method thereof ) 是由 汪华北 李志杰 陈金琪 于 2021-01-22 设计创作，主要内容包括：本发明公开了一种煤焦油气用橡胶密封膜及制备方法,由以下重量份的原料组成：丁腈胶90-120份、聚氯乙烯30-40份、硫化剂1-5份、炭黑15-20份、石蜡5-10份、防老剂1-3份、促进剂1-5份、增塑剂5-8份。本发明提供的技术方案具有如下优异效果：首先优选的骨架材料及特殊的骨架材料组合,采用“*”字型结构,使产品实现了左、右45°角方向上的高强度要求,在垂直方向克服了拉伸形变,具有足够的强度,同时又具有优异的耐屈挠性和柔韧性,从而确保了产品的强度要求,有效解决“鱼眼”状的白色夹生颗粒的问题,并且我公司生产的单幅胶帘布宽度为3m左右,进一步保证了产品的粘接强度和产品质量。(The invention discloses a rubber sealing film for coal tar gas and a preparation method thereof, wherein the rubber sealing film comprises the following raw materials in parts by weight: 90-120 parts of nitrile rubber, 30-40 parts of polyvinyl chloride, 1-5 parts of vulcanizing agent, 15-20 parts of carbon black, 5-10 parts of paraffin, 1-3 parts of anti-aging agent, 1-5 parts of accelerator and 5-8 parts of plasticizer. The technical scheme provided by the invention has the following excellent effects: the method is characterized in that firstly, an optimal framework material and a special framework material are combined, a structure in a shape like a Chinese character 'x' is adopted, so that the product meets the requirement of high strength in the directions of 45 degrees on the left and right, the tensile deformation is overcome in the vertical direction, the product has enough strength, and meanwhile, the product has excellent flexibility and flexibility, so that the strength requirement of the product is ensured, the problem of 'fish eye' -shaped white undercooked particles is effectively solved, and the width of a single-width rubber cord fabric produced by the company is about 3m, so that the bonding strength and the product quality of the product are further ensured.)

1. The rubber sealing film for the coal tar gas is characterized by comprising the following raw materials in parts by weight:

90-120 parts of nitrile rubber, 30-40 parts of polyvinyl chloride, 1-5 parts of vulcanizing agent, 15-20 parts of carbon black, 5-10 parts of paraffin, 1-3 parts of anti-aging agent, 1-5 parts of accelerator and 5-8 parts of plasticizer.

2. The rubber sealing film for coal tar gas as claimed in claim 1, which comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer.

3. The rubber sealing film for coal tar gas of claim 1 wherein the accelerator is rubber accelerator DM.

4. The rubber sealing film for coal tar gas as claimed in claim 1, wherein the antioxidant of the rubber sealing film for coal tar gas is antioxidant 4010 NA.

5. A preparation method of a rubber sealing film for coal tar gas is characterized by comprising the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

s3, rubbing the cord fabric with glue, performing double-sided rubbing with a four-roll calender, extruding and rubbing the glue material into fabric tissue gaps by utilizing shearing force and roller pressure generated by the speed ratio of a roller of the calender so as to improve the adhesive force of the glue material and the fabric and improve the strength and the flexing resistance of the fabric, performing double-sided rubbing with the four-roll calender,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane by adopting a 3.6m wide drum type vulcanizing machine production line, wherein the length of the vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 1m-3.2m,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder.

6. The method for preparing a rubber sealing film for coal tar gas according to claim 5, wherein the cord fabric in the step of rubbing the cord fabric in the step S3 adopts an upper, middle and lower layer cord fabric in a structure of a Chinese character 'x' shape to perform a rubbing process.

7. The method for preparing a rubber sealing film for coal tar gas as claimed in claim 6, wherein the width of the cord fabric is 3.2 m.

Technical Field

The invention belongs to the technical field of floor cloth production, and particularly relates to a rubber sealing film for coal tar gas and a preparation method thereof.

Background

The coal tar gas has complex components and mainly consists of a certain amount of air mixed with gases such as hydrogen sulfide, ammonia, benzene, hydrogen, alkane gas, olefin and the like. Whether the rubber sealing membrane can meet the requirements is an important precondition for ensuring the operation safety of the gas holder.

H₂Higher in content, and H₂Has small molecular weight and is easy to permeate. It has been found that nitrile rubber is a better gas-tight rubber among the general synthetic rubbers, has a much lower gas permeability than butyl rubber, and its gas permeability decreases with increasing acrylonitrile content. The nitrile rubber with high acrylonitrile content can be selected and used together with polyvinyl chloride resin, so that the polarity of rubber molecules is enhanced, the acting force between molecules is improved, the density is increased, and H is₂Molecules are difficult to pass through, and excellent gas permeability resistance is shown. And a coupling agent is added in the matching process, so that the gaps among molecules are reduced, and the penetrability of hydrogen is greatly improved.

H₂S is acidic and easy to corrode. The nitrile rubber has polar side nitrile groups (-CN) in a macromolecular structure, has excellent petroleum-based oil resistance and acid resistance, and compared with the nitrile rubber, the polyvinyl chloride has better ozone resistance and hydrogen sulfide resistance. The solubility and tension of nitrile rubber and polyvinyl chloride are similar, and about 30% of polyvinyl chloride is used in nitrile rubberThe product is in homogeneous phase state, and the H resistance of the nitrile rubber can be greatly improved₂S performance, and the saturated hydrogenated nitrile rubber is added in the formula, so that the product has good hydrogen sulfide corrosion resistance, the dynamic flex property, the wear resistance and the tear resistance of the product can be improved, and the product has better corrosion resistance along with the increase of the content of the hydrogenated nitrile rubber.

Methane, ethane, propane, isobutane, isopentane, n-pentane, etc., which are paraffinic and non-polar materials. Their molecules contain only single bonds, are saturated species and are chemically inert, while nitrile rubbers are polar rubbers which do not react with alkane species. The rubber sealing film can therefore withstand these alkane challenges to the full extent.

Olefins such as ethylene, propylene, butylene, isobutylene and the like have unsaturated double bonds, are active in chemical properties, are easy to react with other substances, and are macroscopically shown as corrosion aging of the adhesive film product. This requires the rubber sealing film to have good corrosion resistance. The polar side nitrile group of the nitrile rubber is known to have excellent corrosion resistance, and is combined with polyvinyl chloride resin with better ozone resistance, and preservatives such as microcrystalline wax can be added into the formula, so that the corrosion resistance of the rubber sealing film is further improved.

The tail gas also contains a certain amount of air, and the rubber sealing film needs to have weather resistance. Therefore, the anti-aging agent with various properties is used together. For products used in high-temperature and humid areas, a moisture-proof and enzyme-proof agent is added into the formula.

Whether the gas holder rubber sealing film has excellent air tightness, ozone resistance, hydrogen sulfide gas corrosion resistance, weather resistance and aromatic hydrocarbon solvent resistance or not depends on the formula of the rubber seeds and the rubber material. At present, the main materials at home and abroad are nitrile rubber and polyvinyl chloride, and the main materials of primary and secondary sealing (rubberized fabric products) for crude oil storage tanks in the petroleum and chemical industries, which are produced by our company for many years, are the blends of nitrile rubber and polyvinyl chloride. Also, different material formulations may be used depending on the different gaseous media to be bottled.

The blend of the nitrile rubber and the polyvinyl chloride has excellent air tightness, ozone resistance, hydrogen sulfide gas corrosion resistance, weather resistance and aromatic hydrocarbon solvent resistance, and meets the related requirements of dynamic flexing performance, tear resistance and wear resistance of a gas holder rubber sealing film product in the using process. In order to uniformly disperse polyvinyl chloride in nitrile rubber and ensure the uniform quality and stable performance of a mixture, PVC resin needs to be pre-swelled and plasticized at high temperature, and when technological conditions such as plasticizing temperature, plasticizing time and the like fluctuate, fish-eye-shaped white intercalated particles are easily generated, so that a rubber sealing film of a gas holder is easily subjected to flex cracking and gas exudation.

The advanced heat conduction oil heating system of our company combines with the use of an internal rubber mixing mill, and the blending process condition requirements of the nitrile rubber and the polyvinyl chloride are ensured.

Characteristics of nitrile rubber: the Nitrile Butadiene Rubber (NBR) has a polar side nitrile group (-CN) in a macromolecular structure, and has strong intermolecular force, so the nitrile butadiene rubber has excellent petroleum-based oil resistance and solvent resistance, strong intermolecular cohesion of the nitrile butadiene rubber and small molecular chain gaps, can effectively prevent gas molecules from diffusing, but has poor ozone resistance and weather resistance.

The characteristics of polyvinyl chloride: compared with nitrile rubber, polyvinyl chloride has better ozone resistance and hydrogen sulfide corrosion resistance.

Therefore, a novel rubber sealing film for coal tar and a preparation method thereof are provided according to the characteristics, so that the rubber sealing film has high service performance and can meet the long-term service life.

Disclosure of Invention

The rubber sealing film for the coal tar gas provided by the invention adopts a structure in a shape of Chinese character 'x', so that the product meets the high strength requirement in the left and right 45-degree angle directions, overcomes tensile deformation in the vertical direction, has sufficient strength, and simultaneously has excellent bending resistance and flexibility, thereby ensuring the strength requirement of the product.

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

a rubber sealing film for coal tar gas comprises the following raw materials in parts by weight:

90-120 parts of nitrile rubber, 30-40 parts of polyvinyl chloride, 1-5 parts of vulcanizing agent, 15-20 parts of carbon black, 5-10 parts of paraffin, 1-3 parts of anti-aging agent, 1-5 parts of accelerator and 5-8 parts of plasticizer.

Preferably, the rubber sealing film for the coal tar gas comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer.

Preferably, the accelerator is rubber accelerator DM.

Preferably, the anti-aging agent of the rubber sealing film for the coal tar gas is the anti-aging agent 4010 NA.

The invention also provides a preparation method of the rubber sealing film for coal tar gas, which comprises the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

and S3, rubbing the cord fabric with glue, performing double-sided rubbing by using a four-roller calender, and extruding and rubbing the glue material into fabric tissue gaps by using shearing force and roller pressure generated by the speed ratio of a roller of the calender so as to improve the adhesive force of the glue material and the fabric and improve the strength and the flexing resistance of the fabric. Adopting a four-roller calender to carry out double-sided frictioning,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane by adopting a 3.6m wide drum type vulcanizing machine production line, wherein the length of the vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 1m-3.2m,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder.

Preferably, the cord fabric in the step of rubbing the cord fabric in the step S3 adopts an "x" shaped structure of upper, middle and lower layers of cord fabric to perform a rubbing process.

Preferably, the cord fabric width is 3.2 m.

Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:

firstly, the preferable framework material and the special framework material are combined, and the structure of the shape like the Chinese character 'x' is adopted, so that the product meets the high strength requirement in the left and right 45-degree angle directions, overcomes the tensile deformation in the vertical direction, has enough strength, and simultaneously has excellent bending resistance and flexibility, thereby ensuring the strength requirement of the product.

On the other hand, the device is advanced, the process is scientific, the sealing performance of the product is outstanding, and the problem of fish eye-shaped white undercooked particles is effectively solved. The width of a single rubber cord fabric produced by enterprises at home and abroad is only 1.6m generally, while the width of a single rubber cord fabric produced by the company is about 3m, so that the number of bonding seams of the whole rubber sealing film is greatly reduced; further ensuring the bonding strength and the product quality of the product.

In conclusion, the rubber sealing film produced by our company has high service performance in complex component gases and can meet the long service life.

Drawings

FIG. 1 is a schematic view of a cord fabric according to example 1 of the present invention;

FIG. 2 is a schematic view of the structure of cord fabrics of examples 1 and 4 of the present invention;

FIG. 3 is a schematic view of the cord fabric structure of embodiments 2 and 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Raw material source list of rubber sealing film for coal tar gas

Example 1

A rubber sealing film for coal tar gas comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer. The accelerator is a rubber accelerator DM. The anti-aging agent of the rubber sealing film for the coal tar gas is the anti-aging agent 4010 NA.

The preparation method of the rubber sealing film for the coal tar gas comprises the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

s3, rubberizing the cord fabric, wherein the width of the cord fabric is 3.2m, and rubberizing is performed by adopting a structure that the cord fabric is in a shape of Chinese character 'x' at the upper layer, the middle layer and the lower layer; the adhesive is rubbed on two sides by a four-roller calender, and the adhesive is squeezed into fabric tissue gaps by utilizing the shearing force and the roller pressure generated by the roller speed ratio of the calender so as to improve the adhesive force between the adhesive and the fabric and improve the strength and the flexing resistance of the fabric. Adopting a four-roller calender to carry out double-sided frictioning,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane, adopting a 3.6m wide drum type vulcanizing machine production line, the length of the vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 3.2m, the common coal tar sealing devices have larger diameters, the large width can adapt to the transverse area of the device better, the number of abutted seams in the radial direction of the tank can be reduced in a limited way,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder.

Example 2

A rubber sealing film for coal tar gas comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer. The accelerator is a rubber accelerator DM. The anti-aging agent of the rubber sealing film for the coal tar gas is the anti-aging agent 4010 NA.

The preparation method of the rubber sealing film for the coal tar gas comprises the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

s3, rubberizing the cord fabric, wherein the width of the cord fabric is 3.2m, and rubberizing is performed by adopting a structure that the upper and lower layers of cord fabric are in a shape of a Chinese character 'jing'; the adhesive is rubbed on two sides by a four-roller calender, and the adhesive is squeezed into fabric tissue gaps by utilizing the shearing force and the roller pressure generated by the roller speed ratio of the calender so as to improve the adhesive force between the adhesive and the fabric and improve the strength and the flexing resistance of the fabric. Adopting a four-roller calender to carry out double-sided frictioning,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane, adopting a 3.6m wide drum type vulcanizing machine production line, the length of the vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 3.2m, the common coal tar sealing devices have larger diameters, the large width can adapt to the transverse area of the device better, the number of abutted seams in the radial direction of the tank can be reduced in a limited way,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder. Example 3

A rubber sealing film for coal tar gas comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer. The accelerator is a rubber accelerator DM. The anti-aging agent of the rubber sealing film for the coal tar gas is the anti-aging agent 4010 NA.

The preparation method of the rubber sealing film for the coal tar gas comprises the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

s3, rubberizing the cord fabric, wherein the width of the cord fabric is 3.2m, and rubberizing is performed by adopting a structure that the upper and lower layers of cord fabric are in a shape of a Chinese character 'jing'; the adhesive is rubbed on two sides by a four-roller calender, and the adhesive is squeezed into fabric tissue gaps by utilizing the shearing force and the roller pressure generated by the roller speed ratio of the calender so as to improve the adhesive force between the adhesive and the fabric and improve the strength and the flexing resistance of the fabric. Adopting a four-roller calender to carry out double-sided frictioning,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane by adopting a 2.0m wide drum type vulcanizing machine production line, wherein the length of a vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 1.6m,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder. Example 4

A rubber sealing film for coal tar gas comprises the following raw materials in parts by weight:

100 parts of nitrile rubber, 31 parts of polyvinyl chloride, 3 parts of vulcanizing agent, 16 parts of carbon black, 6 parts of paraffin, 2 parts of anti-aging agent, 3 parts of accelerator and 6 parts of plasticizer. The accelerator is a rubber accelerator DM. The anti-aging agent of the rubber sealing film for the coal tar gas is the anti-aging agent 4010 NA.

The preparation method of the rubber sealing film for the coal tar gas comprises the following steps:

s1, polyvinyl chloride pre-swelling: before blending, polyvinyl chloride and nitrile rubber need to be plasticized and swelled, the working procedure is finished on a high-speed kneading machine,

s2, mixing polyvinyl chloride, nitrile rubber, carbon black, paraffin, an anti-aging agent, an accelerator and a plasticizer in an internal mixer, controlling the working temperature of an internal mixing chamber to be 140-145 ℃, controlling the temperature of rubber materials to be 168-175 ℃,

s3, rubberizing the cord fabric, wherein the width of the cord fabric is 3.2m, and rubberizing is performed by adopting a structure that the cord fabric is in a shape of Chinese character 'x' at the upper layer, the middle layer and the lower layer; the adhesive is rubbed on two sides by a four-roller calender, and the adhesive is squeezed into fabric tissue gaps by utilizing the shearing force and the roller pressure generated by the roller speed ratio of the calender so as to improve the adhesive force between the adhesive and the fabric and improve the strength and the flexing resistance of the fabric. Adopting a four-roller calender to carry out double-sided frictioning,

s4, vulcanizing the semi-finished product of the gas holder rubber sealing membrane, adopting a 2.0m wide drum type vulcanizing machine production line, the length of the vulcanized product is unlimited, the single width of the produced gas holder rubber sealing membrane is 1.6m, the common coal tar sealing devices have larger diameters, the large width can adapt to the transverse area of the device better, the number of abutted seams in the radial direction of the tank can be reduced in a limited way,

s5, cutting and polishing, ensuring the consistency of the polishing depth and width of the product, creating good conditions for bonding,

s6, bonding and forming, namely, carrying out one-step forming on the whole bonding seam by adopting a large-scale flat vulcanizing machine to ensure the bonding strength and the dimensional stability of the product,

s7, punching the mounting holes by adopting subarea punching to ensure the accuracy of thousands of mounting hole distances and reduce accumulated errors,

and S8, detecting, namely detecting each bonding seam in order to ensure the air tightness of the rubber sealing film of the gas holder.

Effect evaluation test:

in order to verify the performance of the rubber sealing film for coal tar gas provided by the present invention, the floorcloths prepared in examples 1 to 4 were tested, and the test parameters and the test reference standards were as follows:

tensile strength and elongation at break: GB/T1040.1-2006, the tensile strength is more than or equal to 5;

the observation of the rubber sealing film for the coal tar gas provided by the invention can effectively solve the problem of fish-eye-shaped white undercooked particles, and the performance test results are shown in Table 1:

TABLE 1

Serial number	Tensile Strength (MPa)
		Example 1	9.5
Example 2	8.5
		Example 3	7.5
Example 4	8.6

As can be seen from the experimental data in Table 1, the tensile strength of the rubber sealant film for coal tar gas provided in example 1 of the present invention is 9.5MPa, which is far superior to the test data of the other three examples.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.