CN114248476B - Production method of antistatic organic glass plate substrate - Google Patents
Production method of antistatic organic glass plate substrate Download PDFInfo
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- CN114248476B CN114248476B CN202111568315.2A CN202111568315A CN114248476B CN 114248476 B CN114248476 B CN 114248476B CN 202111568315 A CN202111568315 A CN 202111568315A CN 114248476 B CN114248476 B CN 114248476B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
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Abstract
The application discloses a production method of an antistatic organic glass plate substrate, which comprises the following steps of adding 10-15g of initiator into each ton of MMA raw material, heating to 80-110 ℃ in a polymerization kettle, preserving heat for a certain time according to the purity of the MMA raw material, and naturally cooling to normal temperature after preserving heat to obtain a product A; mixing, namely adding 10-13g of initiator and 9-11Kg of plasticizer into each ton of product A, and uniformly mixing to obtain product B; vacuum filtering, namely vacuum filtering the product B to obtain a product C; pouring the mold, namely pouring the C product into a mold for forming the substrate, and then placing the mold into a warm water tank to solidify the C product to obtain the D product; heating the D product to 105-115 ℃ in case of force fixation, and preserving heat to obtain the E product; and removing the die and maintaining, namely removing the die on the E product to obtain a finished product of the substrate.
Description
Technical Field
The application belongs to the field of antistatic organic glass plate substrates, and particularly relates to a production method of an antistatic organic glass plate substrate.
Background
The antistatic organic glass plate is widely applied in industry and is prepared by spraying antistatic paint on a substrate of organic glass. At present, only one antistatic coating suitable for spraying antistatic organic glass plates is available, and only imported from abroad, and the type of the antistatic coating is U.S. ACL-2005 liquid. At present, a substrate (called imported substrate for short) suitable for manufacturing the antistatic organic glass plate can only be imported from abroad, and the production process of the imported substrate is still in a secret state, and the production capacity is not available in China. If the domestic existing substrate (called domestic substrate for short) of the non-antistatic organic glass plate is adopted to produce the antistatic organic glass plate, the domestic substrate is very cheap but is difficult to combine with the antistatic coating, and the produced antistatic organic glass plate coating is very easy to peel off, has poor antistatic effect and does not have market value. However, the price of the imported substrate is high (37 yuan per kilogram), and additional tariffs are required to be paid, so that the cost for obtaining the imported substrate by enterprises is high. Therefore, the existing antistatic organic glass plate has the defect of high acquisition cost.
Disclosure of Invention
The application aims to provide a production method of an antistatic organic glass plate substrate. The application has the advantage of low acquisition cost.
The technical scheme of the application is as follows: a method for producing an antistatic organic glass plate substrate comprises the following steps,
adding 10-15g of low-temperature initiator into each ton of MMA raw material, heating to 80-110 ℃ in a polymerization kettle, preserving heat for a period of time determined according to the purity of the MMA raw material, preserving heat for 40-45min when the purity of the MMA raw material is more than 99.9%, preserving heat for 60-80min when the purity of the MMA raw material is 95-97%, and naturally cooling to normal temperature after preserving heat to obtain a product A;
mixing, namely adding 10-13g of initiator and 9-11Kg of plasticizer into each ton of product A, and uniformly mixing to obtain product B;
vacuum filtering, wherein the vacuum degree of the product B is 0.07-0.09MPa, the vacuum time is 30-45min, the filtering material is 150-300 mesh filter cloth, and the product C is obtained by three to five times of filtering;
pouring the mold, namely pouring the C product into a mold for forming the substrate, and then placing the mold into a warm water tank to solidify the C product to obtain the D product;
in case of force fixing, heating the product D to 105-115 ℃ while maintaining the state of the die, and adjusting the heat preservation time according to the thickness of the product D to obtain the product E;
and removing the die and maintaining, namely removing the upper die of the E product, and naturally cooling the E product to obtain a finished product of the substrate.
In the production method of the antistatic organic glass plate substrate, in the step of the polymerization kettle, 12g of the low-temperature initiator is heated in the polymerization kettle at the temperature of 95 ℃; when the purity of MMA raw material is more than 99.9%, the temperature is kept for 42min, and when the purity of MMA raw material is 95-97%, the temperature is kept for 70min.
In the production method of the antistatic organic glass plate substrate, in the mixing step, 12g of the initiator and 10Kg of the plasticizer are mixed.
In the production method of the antistatic organic glass plate substrate, in the vacuum filtration step, the relative vacuum degree is negative pressure of 0.08MPa, the vacuum time is 38min, and the filter material is 200-mesh filter cloth and is filtered four times.
In the production method of the antistatic organic glass plate substrate, the water temperature is 60-62 ℃ in the mold filling step.
In the production method of the antistatic organic glass plate substrate, in the step of fixing the permanent force, the D product is heated to 110 ℃, and when the thickness of the D product is 1cm, 8mm and 5mm respectively, the heat preservation time is 2.5h, 2h and 1.5h respectively.
Compared with the prior art, the application improves the production process of the domestic substrate, the obtained substrate can be firmly combined with the antistatic coating, can be well used as an antistatic organic glass plate, and has low acquisition cost. The main improvement points are that in the first mixing step, the dosage of the plasticizer is reduced, 1.2Kg of plasticizer is added in each ton of A product, namely the adding ratio of the plasticizer is 0.12 percent, the adding ratio is increased to 9-11Kg, and the adding ratio is increased to about 1 percent; secondly, in the ten thousand force fixing step, the heating temperature of the D product is reduced from the original 120 ℃ to 105-115 ℃. Thirdly, the heat preservation time of the D product is reduced, for example, the heat preservation time of the D product with the thickness of 1cm is reduced from 3.5h to 2.5h, the heat preservation time of the D product with the thickness of 8mm is reduced from 3h to 2h, and the heat preservation time of the D product with the thickness of 5mm is reduced from 2.5 to 1.5h; the hardness of the resulting substrate is suitably reduced by the above three modifications. The applicant finds through experiments and summaries that the main problem that the existing domestic substrate and the antistatic coating are difficult to combine is that the hardness of the existing domestic substrate is higher than 92 Rockwell, the hardness of the substrate is close to 88 Rockwell through the improvement of the three parts, and the applicant determines that when the hardness of the substrate exceeds 90 Rockwell, the antistatic coating is difficult to combine with the substrate, even though the antistatic coating is barely combined, the antistatic coating is easy to peel due to low bonding strength, the produced antistatic organic glass plate loses market value, the antistatic coating can be combined with the basic material better only when the hardness of the substrate is lower than 90 Rockwell, and when the hardness of the substrate reaches 88 Rockwell, the bonding strength is better, but the continuous reduction of the hardness can generate a knife sticking phenomenon in the processing process and lead to the reduction of the flatness of the substrate. Therefore, the hardness of the base plate is set to be close to Rockwell 88, the bonding strength of the base plate and the antistatic coating is considered, the phenomenon of sticking a knife in the processing process is avoided, and the reduction of the flatness of the base plate is avoided. Therefore, the application has the advantage of low acquisition cost.
Detailed Description
The application is further illustrated by the following examples, which are not intended to be limiting.
Example 1 (best mode). The production method of the antistatic organic glass plate substrate comprises the following steps,
adding 12g of low-temperature initiator into each ton of MMA raw material (liquid state), heating to 95 ℃ in a polymerization kettle, preserving heat, determining the heat preservation time according to the purity of the MMA raw material, wherein when the purity of the MMA raw material is more than 99.9%, the MMA raw material is a new material sold in the market, preserving heat for 42min, and when the purity of the MMA raw material is 95-97%, the MMA raw material is a reclaimed material sold in the market, preserving heat for 70min, and naturally cooling to normal temperature after preserving heat to obtain a product A;
mixing, namely adding 12 initiator and 10Kg plasticizer into each ton of A product, and uniformly mixing to obtain B product;
a vacuum filtering step, which is used for eliminating bubbles in the B product, carrying out vacuum filtration on the B product, wherein the relative vacuum degree is negative pressure of 0.08MPa, the vacuum time is 38min, the filtering material is 200-mesh filter cloth, and the C product is obtained by four times of filtration;
pouring the mold, namely pouring the C product into a mold for molding the substrate, and then placing the mold into a warm water tank, wherein the water temperature is 60-62 ℃, so that the C product is solidified, and a D product is obtained;
in case of force fixing, heating the D product to 110 ℃ under the state of keeping the die, and keeping the temperature, wherein the temperature keeping time is adjusted according to the thickness of the D product, for example, when the thickness of the D product is 1cm, 8mm and 5mm, the temperature keeping time is 2.5h, 2h and 1.5h respectively, so as to obtain an E product;
and removing the die and maintaining, namely removing the upper die of the E product, and naturally cooling the E product to obtain a finished product of the substrate.
Example 2. Unlike example 1, in the polymerization vessel step, 10g of the initiator was heated to 110℃in the polymerization vessel, and the incubation time was 40 minutes when the purity of the MMA raw material was more than 99.9%, and 60 minutes when the purity of the MMA raw material was 95 to 97%.
In the mixing step, 10g of the initiator and 9Kg of the plasticizer are mixed.
In the vacuum filtration step, the relative vacuum degree is negative pressure of 0.09MPa, the vacuum time is 30 min, the filter material is 150-mesh filter cloth, and the filtration is carried out for five times.
In the force fixing step, the D product is heated to 95 ℃.
Example 3. Unlike example 1, in the polymerization vessel step, 15g of the initiator was heated to 80℃in the polymerization vessel, and the incubation time was 45 minutes when the purity of the MMA raw material was more than 99.9%, and 80 minutes when the purity of the MMA raw material was 95 to 97%.
In the mixing step, 13g of the initiator and 11Kg of the plasticizer are mixed.
In the vacuum filtration step, the relative vacuum degree is negative pressure 0.07MPa, the vacuum time is 45min, the filter material is 300-mesh filter cloth, and the filtration is performed three times.
In the force fixing step, the D product is heated to 100 ℃.
Example 1 is an improvement on the production process of domestic substrates, the obtained substrates can be firmly combined with antistatic paint, antistatic organic glass plates can be well manufactured, and meanwhile, the cost is low. The main improvement points are that in the first mixing step, the dosage of the plasticizer is reduced, 1.2Kg of plasticizer is added into each ton of A product, namely the adding ratio of the plasticizer is 0.12 percent, the adding ratio is increased to 10Kg, and the adding ratio is increased to 1 percent; secondly, in the ten thousand force fixing step, the heating temperature of the D product is reduced from the original 120 ℃ to 110 ℃. Third, the heat preservation time of the D product is reduced, for example, the heat preservation time of the D product with the thickness of 1cm is reduced from 3.5h to 2.5h, the heat preservation time of the D product with the thickness of 8mm is reduced from 3h to 2h, and the heat preservation time of the D product with the thickness of 5mm is reduced from 2.5 to 1.5h. The hardness of the finished product is reduced through the three improvements, and the applicant finds through numerous experiments and summaries that the main problem that the existing domestic substrate and the antistatic coating are difficult to combine is that the hardness of the existing domestic substrate is higher and reaches more than Rockwell 92, the hardness of the substrate is reduced to be more than Rockwell 88 through the three improvements, and the applicant determines that when the hardness of the substrate exceeds Rockwell 90 after many experiments, the antistatic coating is difficult to combine with the substrate, even though the antistatic coating is barely combined, the antistatic coating is easy to peel due to low bonding strength, the produced antistatic organic glass plate loses market value, the antistatic coating can be combined with the basic better only when the hardness of the substrate is lower than Rockwell 90, when the hardness of the substrate reaches Rockwell 88, the bonding strength is better, but the cutter sticking phenomenon can be generated in the processing process and the flatness of the substrate is reduced after the hardness is continuously reduced. Therefore, in the embodiment 1, the Rockwell 88 hardness of the substrate is set, the bonding strength of the substrate and the antistatic coating is considered, the phenomenon of sticking a knife in the processing process is avoided, and the reduction of the flatness of the substrate is avoided.
Table 1 below shows the rockwell hardness parameters of the substrates obtained at different plasticizer addition ratios in the compounding step based on example 1.
| Plasticizer addition ratio (%) | 0.1 | 0.12 | 0.3 | 0.7 | 0.9 | 1 | 1.2 | 1.5 | 2 |
| Hardness of substrate (Rockwell) | 94 | 93 | 92 | 91 | 89 | 88 | 86 | 83 | 81 |
TABLE 1
Table 2 shows the rockwell hardness parameters of the substrates obtained at different heating temperatures in the case of the force fixing step based on example 1.
| Temperature (. Degree. C.) | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 |
| Hardness of substrate (Rockwell) | 82 | 83 | 84 | 86 | 88 | 90 | 92 | 93 |
TABLE 2
Table 3 shows the rockwell hardness parameters of the substrates obtained in the case of different thickness D products at different holding times in the force fixing step based on example 1.
TABLE 3 Table 3
As can be seen from table 3, when the incubation time has an effect on the hardness of the substrate, the hardness of the substrate exceeds 90 degrees rockwell when the incubation time is too long, and the substrate is softer when the incubation time is shorter. Meanwhile, when the hardness of the substrate is less than 88 degrees, the obtained substrate has unbalanced thickness tolerance, small pits on the surface, low surface brightness, easy deformation and difficult application as a coating surface.
As can be seen from the above tables 1, 2 and 3, in example 1, the rockwell hardness of the substrate was 88, and three elements of the plasticizer addition ratio in the mixing step, the heating temperature in the ten-thousand-force fixing step, and the heat-retaining time in the ten-thousand-force fixing step were combined, and the combination of the three elements was achieved.
In addition, the application improves the mould filling step, under the original technology, after the C product is filled into the mould for forming the substrate, the mould is naturally cooled, and the mould is placed into a warm water pool with the temperature of 60-62 ℃ for cooling. When the water temperature of the warm water pool exceeds 62 ℃, the quality of the substrate finished product is not reduced, but the solidification speed of the C product is lower, and the solidification speed is lower and lower along with the increase of the water temperature; when the water temperature of the warm water tank is lower than 60 ℃, bubbles are generated in the solidification process of the C product, and as the water temperature is lower, the number of the bubbles is larger, the quality of the substrate finished product is reduced due to excessive bubbles, and even the substrate finished product is failed. The application cools the mould in a warm water pool with the temperature of 60-62 ℃, improves the solidification speed of the C product, shortens the process time and improves the manufacturing efficiency of the substrate on the basis of not influencing the quality of the final product and not generating bubbles inside the product.
The application has the advantage of low acquisition cost, which is similar to the acquisition cost of the original domestic substrate.
Claims (3)
1. The production method of the antistatic organic glass plate substrate is characterized by comprising the following steps of: comprises the steps of,
adding 12g of low-temperature initiator into each ton of MMA raw material, heating to 95 ℃ in a polymerization kettle, preserving heat for 42min when the purity of the MMA raw material is higher than 99.9% and 70min when the purity of the MMA raw material is 95-97% according to the purity of the MMA raw material, and naturally cooling to normal temperature after preserving heat to obtain a product A;
mixing, namely adding 12g of initiator and 10Kg of plasticizer into each ton of A product, and uniformly mixing to obtain B product;
vacuum filtering, wherein the vacuum degree of the product B is 0.07-0.09MPa, the vacuum time is 30-45min, the filtering material is 150-300 mesh filter cloth, and the product C is obtained by three to five times of filtering;
pouring the mold, namely pouring the C product into a mold for forming the substrate, and then placing the mold into a warm water tank to solidify the C product to obtain the D product;
in case of force fixing, heating the D product to 110 ℃ under the state of keeping the die, and keeping the temperature, wherein the heat-preserving time is 2.5h, 2h and 1.5h when the thickness of the D product is 1cm, 8mm and 5mm respectively, so as to obtain the E product;
and removing the die and maintaining, namely removing the upper die of the E product, and naturally cooling the E product to obtain a finished product of the substrate, wherein the hardness of the finished product is Rockwell 88.
2. The method for producing an antistatic organic glass plate substrate according to claim 1, wherein: in the vacuum filtration step, the relative vacuum degree is negative pressure of 0.08MPa, the vacuum time is 38min, the filter material is 200-mesh filter cloth, and the filtration is performed four times.
3. The method for producing an antistatic organic glass plate substrate according to claim 1, wherein: in the mold filling step, the water temperature is 60-62 ℃.
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