CN111331876A

CN111331876A - Production method of glass fiber mesh cover

Info

Publication number: CN111331876A
Application number: CN201811549022.8A
Authority: CN
Inventors: 谢果; 刘琪; 叶应松
Original assignee: Mianyang Zhongyan Grinding Tool Co ltd
Current assignee: Mianyang Zhongyan Grinding Tool Co ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-06-26

Abstract

The invention provides a production method of a glass fiber net cover, which is characterized in that a mixed solution is coated on glass fiber cloth which is soaked in synthetic resin and pre-baked to form a coating, the mixed solution comprises the synthetic resin and leftover material crushed objects which are subjected to curing and crushing treatment, and the leftover material is leftover material generated in the production process of a recycled glass fiber net cover. The glass fiber net cover produced by the invention has higher strength and does not influence the permeation between the glass fiber net cover and the adhesive. The glass fiber net cover is economical and applicable, the leftover materials are fully utilized during manufacturing, and the using amount of 1-3 layers of glass fiber cloth can be reduced according to different specifications compared with the glass fiber cloth layer used by a normal glass fiber net cover. The production cost of the glass fiber net cover is reduced, and the utilization rate of the glass fiber cloth and the synthetic resin is improved.

Description

Production method of glass fiber mesh cover

Technical Field

The invention belongs to the technical field of glass fiber, and particularly relates to a production method of a glass fiber mesh cover.

Background

The glass fiber net cover has strong plasticity, can be made into different shapes and thicknesses according to requirements, is flexible and convenient to use, and is widely applied to sand page plates and back covers of sand plates. The glass fiber net cover is produced through soaking glass fiber cloth in synthetic resin, stoving, laminating, cutting, setting, curing and polishing. The production method determines that nearly 30 percent of leftover materials are generated, the leftover materials are impregnated with synthetic resin, and the cured synthetic resin belongs to high molecular polymers, has large molecular weight, is difficult to degrade and brings great influence on the ecological environment. The treatment of the leftover materials of the glass fiber cloth impregnated with the synthetic resin is difficult, and the treatment is generally carried out by adopting a landfill mode at present, thereby bringing great harm to the ecological environment and being not beneficial to environmental protection. Part of glass fiber net cover manufacturers crush and grind the leftover materials into powder and then add the powder into resin for use, the available leftover material proportion is low, but the powder processing process is complex, the energy consumption is high, and economic benefits are not provided.

In the prior art, in the leftover material treatment technical method, the production method of the glass fiber mesh cover is carried out by utilizing the leftover materials of the glass fiber mesh sheets, the glass fibers and the leftover materials of the glass fibers, but the produced glass fiber mesh cover has unstable strength, the permeability of the adhesive on the glass fiber mesh cover is poor, the bonding strength is reduced, sand leaf discs and sand disc flying sheets are easy to cause, and the safety coefficient is low.

Therefore, it is desirable to provide a method for utilizing these scrap materials to reduce or completely avoid the need for landfill disposal. The production cost of the glass fiber net cover is reduced, and the utilization rate of the glass fiber cloth and the synthetic resin is improved.

Disclosure of Invention

In order to solve the problems, the invention provides a production method for covering edges by using a glass fiber net, which is characterized in that leftover materials are crushed and then are compounded with synthetic resin to be coated on glass fiber cloth, and then the glass fiber cloth is processed and then is packaged into a finished product. The production process is economical and applicable, the leftover materials are fully utilized during production, and the usage amount of 1-3 layers of glass fiber cloth can be reduced according to different specifications compared with the glass fiber cloth layer used for a normal glass fiber net cover. The production cost of the glass fiber net cover is reduced, and the utilization rate of the glass fiber cloth and the synthetic resin is improved.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a production method of a glass fiber mesh cover comprises the step of coating a mixed solution on glass fiber cloth which is subjected to synthetic resin impregnation and pre-baking to form a coating, wherein the mixed solution comprises synthetic resin and leftover bits and pieces which are subjected to solidification and crushing treatment, and the leftover bits and pieces are leftover bits and pieces produced in the production process of the recovered glass fiber mesh cover.

Preferably, the production method of the glass fiber net cover comprises the following steps:

step one, soaking glass fiber cloth in synthetic resin, and then pre-baking for later use;

step two, curing the leftover materials to obtain cured materials;

cutting and crushing the solidified material obtained in the step two to obtain a leftover material crushed material;

step four, compounding the leftover material crushed material obtained in the step three with synthetic resin to prepare a mixed solution;

step five, coating the mixed solution obtained in the step five on the glass fiber cloth treated in the step one to form a coating on the glass fiber cloth;

step six, pre-baking the glass fiber cloth processed in the step five, and then overlapping and pressing;

and step seven, cutting, shaping, curing and polishing the glass fiber cloth processed in the step six, and packaging the glass fiber cloth into a finished product of the glass fiber net cover.

Preferably, the coating method is any one of knife coating or spray coating.

Preferably, the crushed leftover materials comprise 0.15-1.5 mm of fiber particles coated with resin, 0.3-10 mm of chopped fibers and less than or equal to 0.5mm of synthetic resin particles.

Preferably, the mixed solution comprises the following components in percentage by weight: the leftover material crushed material: 40% -65%, the synthetic resin: 35-60 percent, and the total weight percentage sum is 100 percent.

Preferably, the synthetic resin is any one of a phenol resin and a modified phenol resin.

Preferably, a pigment, a diluent, a dispersant, etc. may be further added to the mixed solution.

Preferably, the thickness of the coating is 0.1mm to 1.0 mm.

Preferably, the method for producing the glass fiber net cover further comprises the following steps:

step eight, compounding the leftover materials obtained in the polishing and rounding process in the step seven with synthetic resin to prepare a mixed solution;

step nine, repeating the processes from the step five to the step seven on the mixed liquid obtained in the step eight to prepare a finished product of the glass fiber net cover;

and step ten, repeating the processes from the step two to the step seven on the leftover materials generated in the cutting process of the step seven to manufacture a finished product of the glass fiber net cover.

In order to achieve the purpose, the inventor develops a production method of the glass fiber net cover in the long-term theoretical and experimental research process, and leftover materials generated in the production process of the glass fiber net cover are used as a raw material of the glass fiber net cover, so that the recycling of waste materials is realized, the harm to the environment when the leftover materials are treated is reduced, and the production cost of the glass fiber net cover is reduced.

When adopting the leftover material, the leftover material is solidified and then crushed, the crushed leftover material is obtained, the crushed leftover material and the resin solution are compounded to form a mixed solution, the mixed solution is coated on the treated glass fiber cloth, and then the glass fiber cloth is processed into the glass fiber net cover. In the process, the leftover materials are required to be cured, because synthetic resin is required to be used in the production process of the glass fiber net cover, the resin crosslinking degree and the molecular weight are low when the resin is not cured, when the resin is cut, crushed or ground, the synthetic resin is easy to adhere to equipment, so that the equipment cannot normally operate or related accessories are greatly abraded, the expected treatment effect cannot be achieved, meanwhile, the leftover materials are of a multilayer structure, the leftover materials which are not cured are not easy to disperse in the grinding process, the expected grinding effect cannot be achieved, and the production of the glass fiber net cover in the later period is influenced. And crushing the solidified leftover materials, compounding the crushed leftover materials with a resin solution to form a mixed solution, coating the mixed solution on the glass fiber cloth subjected to impregnation and pre-baking treatment, and processing the glass fiber cloth into a glass fiber mesh cover. The coating width can be adjusted by adopting a coating mode, the influence of the virtual edges of the glass fiber cloth is avoided, the glass fiber net cover is a laminated product, the laminated product has an important parameter, namely a compression ratio, the compression ratio is related to the thickness of a root material, the compression ratio is directly related to the strength of the net cover, the compression ratio is too low, and the net cover is layered and has insufficient strength; the compression ratio is too high, and glue in the net cover overflows to cause the net cover to seal holes, so that the rotation strength of the sand page disc and the sand disc is reduced, and the safety risk is increased; the application adopts a coating method, so that the thickness of the root material can be adjusted, and the glass fiber net cover is controlled within a proper compression ratio range; simultaneously, the coating coated on the glass fiber mesh cloth can reduce the usage amount of 1-3 layers of glass fiber cloth according to different specifications relative to the number of layers of glass fiber cloth used by a normal glass fiber mesh cover. The production cost of the glass fiber net cover is reduced, and the utilization rate of the glass fiber cloth and the synthetic resin is improved.

The production method specifically comprises the following steps:

step two, utilizing curing equipment to cure leftover materials in the production process of the glass fiber net cover to obtain a cured material;

cutting the leftover materials obtained in the step two by using cutting equipment to obtain irregular small blocks of 1-10 cm, and crushing the cut irregular small blocks by using crushing equipment to obtain leftover material crushed materials;

step four, compounding the crushed leftover materials obtained in the step three with synthetic resin by utilizing compounding equipment to obtain a uniform mixed solution;

step five, coating the mixed solution prepared in the step four on the glass fiber cloth treated in the step one by using coating equipment to form a coating on the glass fiber cloth;

step six, pre-baking the glass fiber cloth processed in the step five by using baking equipment, stacking different layers according to the specification of the glass fiber net cover and the requirements of the strength of the sand page disc and the sand disc, and standing and pressing;

cutting the glass fiber cloth processed in the step six by using cutting equipment to obtain a glass fiber net cover blank and leftover materials, binding a grinding wheel hole insert on the glass fiber net cover blank by using a ring binding machine, shaping the glass fiber net cover blank by using a shaping spacer, curing the glass fiber net cover blank by using curing equipment, rounding the glass fiber net cover blank by using polishing rounding equipment, and packaging to obtain a glass fiber net cover finished product;

according to the invention, the mixed solution is coated on the glass fiber cloth which is impregnated with the synthetic resin and is subjected to pre-baking treatment in a blade coating or spraying manner, and when the blade coating is carried out in the blade coating manner, the leftover material crushed materials in the mixed solution can fill gaps existing in the glass fiber cloth, so that the internal structure of the glass fiber mesh cover is more uniform, the compression ratio of the glass fiber mesh cover is ensured to be consistent, the interlayer bonding force between the glass fiber cloth is increased, the layering phenomenon is reduced, the average strength of the glass fiber mesh cover is improved, the safety performance is also improved, the use of the glass fiber cloth and the synthetic resin is reduced, and the production cost is reduced. When the spraying mode is adopted for spraying, the chopped fiber part in the mixed solution is punctured on the glass fiber mesh cloth, which is equivalent to grafting the glass fiber mesh cloth, so that the bonding force between the glass fiber and the synthetic resin is increased, the interlayer bonding force between the glass fiber cloth is increased, the layering phenomenon is reduced, the average strength of the glass fiber mesh cover is improved, the safety performance is also improved, the use of the glass fiber cloth and the synthetic resin is reduced, and the production cost is reduced.

In addition, pigment can be added into the mixed solution, so as to ensure the consistent appearance of the mesh cover; the diluent can also be added to easily adjust the viscosity of the mixture; a dispersant may be added to ensure the dispersibility and uniformity of the ground scrap. Meanwhile, the thickness of the coating is controlled to be 0.1-1.0 mm, so that the thickness of the coating can be reduced by 1-3 layers of glass fiber cloth according to different specifications. The production cost of the glass fiber net cover is reduced, and the utilization rate of the glass fiber cloth and the synthetic resin is improved.

In addition, aiming at the treatment of the leftover materials obtained in the step six, directly compounding the leftover materials obtained in the step six in the polishing procedure with synthetic resin to prepare a mixed solution, and repeating the step five to the step seven on the mixed solution to prepare a finished product of the glass fiber net cover; and (5) repeating the processes from the second step to the seventh step on the leftover materials generated in the sixth cutting process to manufacture a finished product of the glass fiber net cover. The leftover material of the invention realizes cyclic utilization, saves resources and reduces the production cost of the glass fiber net cover.

The invention also comprises the following steps:

collecting leftover materials produced during rounding of the glass fiber net cover by using dust removing equipment, and compounding the leftover materials and synthetic resin by using compounding equipment to obtain uniform mixed liquid;

step nine, the mixed liquid obtained in the step eight is subjected to the processes from the step five to the step seven to be prepared into a finished product of the glass fiber net cover, the quality of the finished product prepared by utilizing the leftover materials at the polished and round-trimmed positions cannot be different, and the production cost of the used finished product can be further reduced through the recovery process of the step;

the invention also comprises the following steps:

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A production method of a glass fiber net cover comprises the following steps:

step one, soaking glass fiber cloth in phenolic resin, and then pre-baking for later use;

cutting the leftover materials obtained in the step two by using cutting equipment to obtain irregular small blocks of 1-10 cm, and crushing the cut irregular small blocks by using crushing equipment to obtain leftover material crushed materials, wherein the leftover material crushed materials comprise fiber particles of 0.15-1.5 mm wrapped with resin, chopped fibers of 0.3-10 mm and synthetic resin particles less than or equal to 0.5 mm;

compounding the crushed leftover materials obtained in the step three with phenolic resin by utilizing compounding equipment to obtain a uniform mixed solution, wherein the components and the weight ratio of the mixed solution are that the crushed leftover materials account for 40 percent, and the phenolic resin accounts for 60 percent;

step five, the mixed solution prepared in the step four is coated on the glass fiber cloth processed in the step one by a blade coating device to form a coating on the glass fiber cloth, wherein the thickness of the coating is 1.0mm later;

cutting the glass fiber cloth processed in the step six by using cutting equipment to obtain a glass fiber net cover blank and leftover materials, binding a grinding wheel hole insert on the glass fiber net cover blank by using a ring binding machine, shaping the glass fiber net cover blank by using a shaping spacer, curing the glass fiber net cover blank by using curing equipment, rounding the glass fiber net cover blank by using polishing rounding equipment, and finally packaging to obtain a finished product;

the devices and components used in this embodiment, such as the curing device, the cutting device, the pulverizing device, the compounding device, the knife coating device, the baking device, the ring binding machine, the sand wheel hole insert, the sizing spacer, and the polishing and rounding device, are devices and components known to those skilled in the art, and the working principle and process thereof will not be described in detail herein.

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.83, the content of the synthetic resin is 27 percent, and the average strength of the mesh cover is 5500N.

Example 2

A production method of a glass fiber net cover comprises the following steps:

collecting leftover materials generated in the rounding process of the glass fiber mesh cover in the embodiment 1 by using dust removing equipment, and then compounding the leftover materials and phenolic resin by using compounding equipment to obtain a uniform mixed solution, wherein the components and the weight ratio of the mixed solution are that the leftover materials account for 60 percent, and the phenolic resin accounts for 40 percent;

thirdly, the mixed solution prepared in the second step is coated on the glass fiber cloth processed in the first step in a scraping mode through a scraping device, a coating is formed on the glass fiber cloth, and the thickness of the coating is 0.1mm later;

step four, pre-baking the glass fiber cloth processed in the step three by using baking equipment, stacking different layers of cloth according to the specification of the glass fiber net cover and the requirements of the strength of the sand page disc and the sand disc, and standing and pressing;

cutting the glass fiber cloth processed in the fourth step by using cutting equipment to obtain a glass fiber mesh cover blank and leftover materials, binding a grinding wheel hole insert on the glass fiber mesh cover blank by using a ring binding machine, shaping the glass fiber mesh cover blank by using a shaping spacer, curing the glass fiber mesh cover blank by using curing equipment, rounding the glass fiber mesh cover blank by using polishing rounding equipment, and finally packaging to obtain a finished product;

the devices and components used in this embodiment, such as the curing device, the dust removing device, the cutting device, the compounding device, the knife coating device, the baking device, the ring binding machine, the sand wheel hole insert, the sizing spacer, and the polishing and rounding device, are devices and components known to those skilled in the art, and the working principle and process thereof will not be described in detail herein.

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.82, the content of the synthetic resin is 26 percent, and the average strength of the mesh cover is 5900N.

Example 3

A production method of a glass fiber net cover comprises the following steps:

step two, collecting leftover materials generated in the step seven of covering the glass fiber net in the embodiment 1 or the step five of cutting in the embodiment 2, and curing the leftover materials by using curing equipment to obtain cured materials;

cutting the leftover materials obtained in the step two by using cutting equipment to obtain irregular small blocks of 1-7 cm, and crushing the cut irregular small blocks by using crushing equipment to obtain leftover material crushed materials, wherein the leftover material crushed materials comprise fiber particles of 0.15-1.5 mm wrapped with resin, 0.3-10 mm chopped fibers and synthetic resin particles less than or equal to 0.5 mm;

compounding the crushed leftover materials obtained in the step three with phenolic resin by utilizing compounding equipment to obtain a uniform mixed solution, wherein the components and the weight ratio of the mixed solution are 65 percent of the crushed leftover materials and 35 percent of the phenolic resin;

step five, the mixed solution prepared in the step four is coated on the glass fiber cloth processed in the step one by a blade coating device, and a coating is formed on the glass fiber cloth, wherein the thickness of the coating is 0.6mm later;

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.84, the content of the synthetic resin is 25 percent, and the average strength of the mesh cover is 5700N.

Example 4

A production method of a glass fiber net cover comprises the following steps:

step one, soaking glass fiber cloth in modified phenolic resin, and then pre-baking for later use;

and step four, compounding the crushed leftover materials obtained in the step three with modified phenolic resin by utilizing compounding equipment to obtain a uniform mixed solution, wherein the mixed solution comprises 40% of the crushed leftover materials and 60% of the modified phenolic resin in parts by weight, and pigment is added into the mixed solution and accounts for 1% of the crushed leftover materials and the modified phenolic resin in parts by weight.

Step five, the mixed solution prepared in the step four is coated on the glass fiber cloth processed in the step one by a blade coating device, and a coating is formed on the glass fiber cloth, wherein the thickness of the coating is 0.3mm later;

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.83, the content of the synthetic resin is 26 percent, and the average strength of the mesh cover is 5900N.

Example 5

A production method of a glass fiber net cover comprises the following steps:

compounding the crushed leftover materials obtained in the step three with phenolic resin by utilizing compounding equipment to obtain a uniform mixed solution, wherein the mixed solution comprises 35% of the crushed leftover materials and 65% of the phenolic resin in parts by weight, and a dispersing agent is added into the mixed solution, and the weight of the dispersing agent is 1% of the weight of the crushed leftover materials and the modified phenolic resin;

step five, spraying the mixed solution prepared in the step four on the glass fiber cloth treated in the step one by using spraying equipment to form a coating on the glass fiber cloth, wherein the thickness of the coating is 1.0mm later;

the devices and components used in this embodiment, such as the curing device, the cutting device, the pulverizing device, the compounding device, the spraying device, the baking device, the ring binding machine, the sand wheel hole insert, the sizing spacer, and the polishing and rounding device, are devices and components known to those skilled in the art, and the working principle and process thereof will not be described in detail herein.

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.83, the content of the synthetic resin is 28 percent, and the average strength of the mesh cover is 5600N.

Example 6

A production method of a glass fiber net cover comprises the following steps:

collecting leftover materials generated in the rounding process of the glass fiber mesh cover in the embodiment 5 by using dust removing equipment, and then compounding the leftover materials with phenolic resin by using compounding equipment, wherein the mixed solution comprises 55% of the leftover materials and 45% of the phenolic resin in parts by weight, and is further added with a diluent and a dispersing agent, and the weight of the diluent is 4.5% of that of the leftover materials and the modified phenolic resin; the weight of the dispersing agent is 1.2 percent of that of the leftover materials and the modified phenolic resin;

step three, spraying the mixed solution prepared in the step two on the glass fiber cloth treated in the step one by using spraying equipment to form a coating on the glass fiber cloth, wherein the thickness of the coating is 0.1mm later;

the devices and components used in this embodiment, such as the curing device, the dust removing device, the cutting device, the compounding device, the spraying device, the baking device, the ring binding machine, the grinding wheel hole insert, the sizing spacer, and the polishing and rounding device, are devices and components known to those skilled in the art, and the working principle and process thereof will not be described in detail herein.

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.83, the content of the synthetic resin is 28 percent, and the average strength of the mesh cover is 6100N.

Example 7

A production method of a glass fiber net cover comprises the following steps:

step two, collecting leftover materials generated in the step seven of covering the glass fiber net in the embodiment 5 or the step five of cutting in the embodiment 6, and curing the leftover materials by using curing equipment to obtain cured materials;

compounding the crushed leftover materials obtained in the step three with phenolic resin by utilizing compounding equipment to obtain a uniform mixed solution, wherein the mixed solution comprises 60% of the crushed leftover materials and 40% of the phenolic resin by weight, and is further added with a diluent and a dispersing agent, and the weight of the diluent is 6% of the weight of the crushed leftover materials and the modified phenolic resin; the weight of the dispersing agent is 1.3 percent of the weight of the crushed leftover materials and the modified phenolic resin;

step five, spraying the mixed solution prepared in the step four on the glass fiber cloth treated in the step one by using spraying equipment to form a coating on the glass fiber cloth, wherein the thickness of the coating is 0.6mm later;

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.84, the content of the synthetic resin is 27 percent, and the average strength of the mesh cover is 5900N.

Example 8

A production method of a glass fiber net cover comprises the following steps:

compounding the crushed leftover materials obtained in the step three with modified phenolic resin by using compounding equipment to obtain a uniform mixed solution, wherein the mixed solution comprises 40% of the crushed leftover materials and 60% of the modified phenolic resin by weight, and is further added with pigment, diluent and dispersing agent, the weight of the pigment is 1% of the crushed leftover materials and the modified phenolic resin, and the weight of the diluent is 6% of the crushed leftover materials and the modified phenolic resin; the weight of the dispersing agent is 1.3 percent of the weight of the crushed leftover materials and the modified phenolic resin;

step five, spraying the mixed solution prepared in the step four on the glass fiber cloth treated in the step one by using spraying equipment to form a coating on the glass fiber cloth, wherein the thickness of the coating is 0.3mm later;

Comparative example 1

A production method of a glass fiber net cover comprises the following steps:

step two, overlapping the glass fiber cloth processed in the step one according to the specification of the glass fiber net cover and the requirements of the strength of the sand page disc and the sand disc, standing and pressing;

cutting the glass fiber cloth processed in the step two by using cutting equipment to obtain a glass fiber net cover blank and leftover materials, binding a grinding wheel hole insert on the glass fiber net cover blank by using a ring binding machine, shaping the glass fiber net cover blank by using a shaping spacer, curing the glass fiber net cover blank by using curing equipment, rounding the glass fiber net cover blank by using polishing rounding equipment, and finally packaging to obtain a finished product;

the devices and components used in the present embodiment, such as the curing device, the cutting device, the baking device, the ring binding machine, the wheel hole insert, the shaping spacer, and the polishing and rounding device, are well known to those skilled in the art, and the working principle and process thereof will not be described in detail herein.

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.88, the content of the synthetic resin is 31 percent, and the average strength of the mesh cover is 4100N.

Comparative example 2

A production method of a glass fiber net cover comprises the following steps:

The diameter of the mesh cover of the product of the embodiment is 95mm (according to the design requirement of the sand page disc), the compression ratio is 0.80, the content of the synthetic resin is 31 percent, and the average strength of the mesh cover is 4300N.

The performance parameters of the fiberglass mesh caps of examples 1-8 and comparative examples 1-2 are shown in table 1:

TABLE 1 Performance parameters of fiberglass mesh caps

Through the experimental results of the above examples 1-8 and comparative examples 1-2, as shown in table 1, the production method of the glass fiber net cover of the present invention facilitates to control the compression ratio of the glass fiber net cover in a reasonable range, the compression ratios of the examples 1-8 are controlled between 082-0.84, while the compression ratio of the comparative example 1 is 0.80, and the compression ratio of the comparative example 2 reaches 0.88, which indicates that the compression ratio of the prior art is not easy to control; the synthetic resin contents of examples 1 to 8 of the glass fiber net cover of the present invention were 25% to 28%, and the synthetic resin contents of comparative example 1 and comparative example 2 reached 31%, indicating that the amount of the synthetic resin used was reduced in the present application; the average strength of the caps of examples 1 to 8 of the glass fiber cap according to the present invention was 5500N to 6100N, whereas the average strength of the cap of comparative example 1 was only 4100N, and that of comparative example 2 was only 4300N, which shows that the method for producing the glass fiber cap according to the present invention can improve the average strength of the glass fiber cap.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A production method of a glass fiber net cover is characterized in that a mixed solution is coated on glass fiber cloth which is pre-baked by dipping synthetic resin to form a coating, the mixed solution comprises the synthetic resin and leftover material crushed objects which are subjected to solidification and crushing treatment, and the leftover material is leftover material generated in the production process of a recycled glass fiber net cover.

2. A method of producing a glass fibre web cover according to claim 1, characterised in that it comprises the following steps:

step two, curing the leftover materials to obtain cured materials;

step four, compounding the crushed leftover material obtained in the step three with synthetic resin to form a mixed solution;

step five, coating the mixed solution obtained in the step four on the glass fiber cloth treated in the step one to form a coating on the glass fiber cloth;

3. The method for producing a glass fiber net cover according to claim 2, wherein the coating is any one of knife coating or spray coating.

4. The method for producing a glass fiber net cover according to claim 3, wherein the crushed scrap comprises 0.15mm to 1.5mm resin-coated fiber particles, 0.3mm to 10mm chopped fibers and 0.5mm or less synthetic resin particles.

5. The method for producing a glass fiber net cover according to claim 4, wherein the mixed solution comprises the following components in parts by weight: the leftover material crushed material: 40% -65%, the synthetic resin: 35-60 percent, and the total weight percentage sum is 100 percent.

6. The method for producing a glass fiber net cover according to claim 5, wherein the synthetic resin is any one of phenolic resin or modified phenolic resin.

7. The method for producing a glass fiber net cover according to claim 6, wherein a pigment, a diluent, a dispersant, etc. may be further added to the mixed solution.

8. The method for producing a glass fiber net cover according to claim 7, wherein the thickness of the coating is 0.1mm to 1.0 mm.

9. A method of producing a glass fiber web cover according to claims 1-8, wherein the method of producing a glass fiber web cover further comprises:

and step nine, repeating the processes from the step five to the step seven on the mixed liquid obtained in the step eight to prepare a finished product of the glass fiber net cover.

10. A method of producing a glass fiber web cover according to claims 1-9, wherein the method of producing a glass fiber web cover further comprises: