CN112980172A

CN112980172A - Manufacturing method of anti-infrared high-energy heat-insulation spectacle lens

Info

Publication number: CN112980172A
Application number: CN202110232504.6A
Authority: CN
Inventors: 吴建斌; 王旭静; 吴衍梅
Original assignee: Eyepol Polarizing Technology Xiamen Co Ltd
Current assignee: Eyepol Polarizing Technology Xiamen Co Ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-06-18
Anticipated expiration: 2041-03-03
Also published as: CN112980172B

Abstract

The invention discloses a method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens, which comprises the steps of drying PC or PA; uniformly mixing 8-15kg of PC or PA, 8-13g of nano metal oxide and 2-7g of dispersing agent; forming the mixed material into a strip material; forming the strip-shaped material into cylindrical anti-infrared master batches; drying the PC or PA plastic rice; mixing the prepared infrared-resistant master batch with the dried PC or PA plastic rice according to the proportion of 0.1kg-0.5kg of master batch to 1kg of plastic rice, and uniformly stirring; and (3) mixing the stirred materials to form the anti-infrared high-energy heat-insulation spectacle lens. The invention has simple manufacturing method, lower cost, more stable and uniform color and improved product quality. The product is detected that the light transmittance of an infrared region of 780-ion 2000nm reaches 8.69 percent, namely the blocking rate is 91.31 percent, the visible light transmittance reaches 78.43 percent, and the haze reaches 0.8 percent, so that the product has the advantages of preventing near infrared rays from irradiating eyes, insulating heat, protecting skin around the eyes, slowing down aging and reducing the occurrence probability of cataract.

Description

Manufacturing method of anti-infrared high-energy heat-insulation spectacle lens

Technical Field

The invention relates to the technical field of production and manufacturing of sunglass lenses, in particular to a method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens.

Background

Light is divided by wavelength, including ultraviolet, visible, and infrared. Visible light (red, orange, yellow, green, blue, violet) refers to light that is perceived by human vision, ultraviolet being light outside the violet light of the spectrum, and infrared being light outside the red light of the spectrum. The infrared ray is a kind of heat radiation, has strong penetrating power, can directly reach the eyeground, is absorbed by the retina, causes acute eye injury, and even induces cataract after long-term irradiation. Therefore, under special circumstances, it is necessary to wear protective glasses to prevent the infrared rays from damaging the eyes, and glasses products with an anti-infrared function are also produced.

There are two types of anti-infrared lenses currently on the market. One method is to adopt a film coating mode to manufacture the anti-infrared lens, the film coating method is complex, the manufacture is troublesome, the cost is high, the color of the coated film is unstable and uneven, and after the coated film is used for a period of time, the situation that the film is damaged or even stripped exists, so that the anti-infrared function is lost, and the product quality is poor. The other method is to adopt common master batches to be added and injected to prepare the infrared-resistant lens, and the common master batches are easy to carbonize due to no high temperature resistance in the mixing and injection molding process with PC/PA plastic rice, so that the lens has black spots and impurity spots, and the quality of the lens is directly influenced.

In view of the above, the present inventors have made extensive and intensive studies to develop and design the present invention in view of the problems of the existing anti-infrared lenses on the market.

Disclosure of Invention

The invention aims to provide a method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens, which has the advantages of simple manufacture, lower cost, more stable and uniform color and improved product quality.

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

a method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens comprises the following steps:

firstly, drying polycarbonate PC or polyamide PA by adopting a dryer, wherein the drying temperature is 85-115 ℃, the drying time is 3-5 hours, and the water content is controlled to be 0.03-0.15%;

step two, uniformly stirring 8-15kg of the polycarbonate or polyamide dried in the step one, 8-13g of nano metal oxide and 2-7g of dispersing agent;

the nano-scale metal oxide is one or more of nano tin antimony oxide, nano tungsten oxide and nano indium tin oxide; the grain diameter of the nano-scale metal oxide is 10nm-50 nm;

the dispersant is ethylene bis stearamide dispersant;

thirdly, heating, melting, shearing, conveying and extruding the mixed and stirred material obtained in the second step through a particle extractor, and cooling the material through a cooling water tank to form a strip-shaped material;

fourthly, cutting the strip-shaped material cooled in the third step into plastic particle samples with the particle size phi of 1.5 x 3mm by a dicing device to form cylindrical infrared-resistant master batches with the infrared-resistant function;

fifthly, drying a certain amount of PC or PA plastic rice by a dryer, setting the temperature to be 90-120 ℃, the time to be 2-4 hours, and controlling the water content to be 0.03-0.15%;

sixthly, matching the infrared-resistant master batch prepared in the fourth step with the PC or PA plastic rice dried in the fifth step according to the proportion that the master batch is 0.1kg to 0.5kg to correspond to 1kg of plastic rice, adding 0.01g to 0.1g of toner (which can be prepared into colored lenses according to the requirements of customers) for mixing, and uniformly stirring the mixture by a stirrer for 1 to 2 hours;

and seventhly, putting the mixed material stirred in the sixth step into a charging basket of a vertical injection molding machine, and performing vacuum high-temperature high-pressure injection molding, wherein the injection molding temperature is set to be 280-320 ℃, so as to form the infrared-resistant high-energy heat-insulation spectacle lens.

Further, adding an eighth step, cleaning and strengthening the anti-infrared lenses subjected to injection molding in the seventh step by an 11-tank double-row cleaning strengthening machine, wherein the cleaning tank is cleaned by ultrasonic waves and pure water, and the temperature is set to be 55-85 ℃; strengthening by using strengthening liquid, and carrying out strengthening operation in a soaking and pulling mode, wherein the pulling speed is 70-180mm/min, and the temperature of a strengthening tank is 18-25 ℃;

ninth, after strengthening, pre-drying and drying are carried out, wherein the pre-drying temperature is 68-88 ℃, the pre-drying time is 5-10 minutes, the drying temperature is 95-120 ℃, and the drying time is 2-4 hours; the hardness of the lens is enhanced, so that the lens is wear-resistant and scratch-resistant.

After the scheme is adopted, the anti-infrared ray master batch is added to prepare the anti-infrared ray lens through injection molding, compared with the anti-infrared ray lens prepared by adopting a film coating mode in the prior art, the manufacturing method is simple, the manufacturing is easy, the cost is lower, the color is more stable and uniform, the situation that the anti-infrared ray function is lost after the anti-infrared ray lens is used is avoided, compared with the anti-infrared ray lens prepared by adopting common master batch addition injection molding in the prior art, the anti-infrared ray master batch disclosed by the invention is high-temperature resistant, and cannot be carbonized in the mixed injection molding process with PC/PA plastic rice, the lens is prevented from generating black points and impurity points, the quality of the product is ensured, and the.

Compared with the lens made of the common master batch, the lens is lower in cost. The dispersing agent used in the common master batch granulation is not high temperature resistant, and the master batch and the PC material are easily carbonized during fusion injection molding, so that black spots and impurity spots are more, more defective products are caused, and the cost is increased.

The lens product of the invention has more stable and uniform color, because the dispersing agent used by the master batch of the invention has better dispersibility, the metal oxide can be dispersed more uniformly, the color of the master batch is more balanced and stable, and the color is more uniform when the lens product is injection molded again.

The product prepared by the invention is detected to have the light transmittance of an infrared region of 780-2000nm reaching 8.69 percent, namely the blocking rate is 91.31 percent, the visible light transmittance reaches 78.43 percent and the haze reaches 0.8 percent, and has the advantages of preventing near infrared rays from irradiating eyes, insulating heat, protecting skin around the eyes, slowing down aging and reducing the occurrence probability of cataract.

Drawings

FIG. 1 is a spectrum test chart of example 12.

FIG. 2 is a spectrum test chart of example 15.

FIG. 3 is a spectrum test chart of example 18.

FIG. 4 is a spectrum test chart of example 20.

FIG. 5 is a spectral test chart of comparative example 8.

Fig. 6 is a spectral test chart of comparative example 11.

Fig. 7 is a spectral test chart of comparative example 13.

Detailed Description

The invention discloses a method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens, which comprises the following specific steps.

Firstly, 8-15kg of polycarbonate PC or polyamide PA is dried by a drier at 85-115 ℃ for 3-5 hours, and the water content is controlled to be 0.03-0.15%.

And secondly, mixing 8-15kg of the polycarbonate or polyamide dried in the first step, 8-13g of nano metal oxide and 2-7g of dispersing agent by a vertical stirring barrel, and uniformly stirring for 1-2 hours.

The nano-scale metal oxide is one or more of nano tin antimony oxide, nano tungsten oxide and nano indium tin oxide. The particle size of the nano-scale metal oxide is 10nm-50 nm.

The dispersant is ethylene bis stearamide dispersant;

and thirdly, heating and melting the mixed and stirred material obtained in the second step by a grain extractor with a screw rod of 5 meters long, shearing, conveying and extruding the plastic grains in the screw rod from back to front by the rotation of the screw rod, setting the temperature at 235 ℃ and 280 ℃ and the power at 110kw, and cooling the plastic grains by a cooling water tank to form a strip-shaped material for 15-30 seconds.

And fourthly, cutting the strip-shaped material cooled in the third step into plastic particle samples through a granulating device, wherein the power is 5.5kw, and the particle size phi is 1.5 x 3mm, so that cylindrical infrared-resistant master batches with the infrared-resistant function are formed.

Fifthly, drying a certain amount of PC or PA plastic rice by a dryer, setting the temperature at 90-120 ℃, the time duration at 2-4 hours, and controlling the water content at 0.03-0.15%.

Sixthly, matching the infrared-resistant master batch prepared in the fourth step with the PC or PA plastic rice dried in the fifth step according to the proportion that 0.1kg-0.5kg of master batch is corresponding to 1kg of plastic rice, adding 0.01g-0.1g of toner (according to the requirements of customers) for mixing, and uniformly stirring by using a stirrer for 1-2 hours.

The present invention adds an eighth step and a ninth step after the seventh step to increase the hardness of the lens.

Eighthly, cleaning and strengthening the anti-infrared lens subjected to injection molding in the seventh step by an 11-groove double-row cleaning strengthening machine, wherein a cleaning groove is cleaned by ultrasonic waves and pure water, and the temperature is set to be 55-85 ℃; the strengthening is carried out by soaking and pulling the strengthening solution at a pulling speed of 70-180mm/min and at a strengthening tank temperature of 18-25 ℃.

Taking a polycarbonate PC lens as an example, the invention analyzes the influence of the proportion of different nanoscale metal oxides with the infrared ray resistant effect and the dispersant ethylene bis stearamide on the haze value of the granulation master batch and the transmittance of an infrared ray region of 780-plus-2000 nm, and the influence of the proportion of different dosage of the infrared ray resistant master batch and PC plastic rice on the light transmittance, visible light transmittance and other properties of the product in the infrared ray region of 780-plus-2000 nm.

The table is a list of the mixture ratio of the anti-infrared master batch prepared by selecting different nano metal oxides and the dispersing agent ethylene bis stearamide. Of these, examples 1 to 10 are examples formulated according to the present invention, and comparative examples 1 to 6 are comparative examples formulated differently from the present invention.

Watch 1

The master batch granulation study is carried out as shown in table one, and the PC material is respectively granulated with three nanoscale metal oxides (tin antimony oxide, tungsten oxide and indium tin oxide) and a dispersing agent ethylene bis stearamide according to a certain proportion to study the infrared ray resistant effect, so that the optimal formula and proportion are selected.

In the table I, 10kg of PC material is fixed for granulation, after granulation is carried out according to the ratio of the table I, the original grains are molded into a flat plate sheet with the thickness of 2mm through an injection molding machine, and then detection is carried out, and the data comparison of detection results is as follows:

examples 1-10 are suitable formulations and ratios, and example 8 is the best formulation and ratio from the assay results data analysis. Antimony tin oxide, tungsten oxide and indium tin oxide all have anti-infrared effects, and PC, tungsten oxide and dispersant ethylene bis stearamide are combined to achieve the best effect.

In examples 1 to 3, the amount of the nanoscale metal oxide added was 8g, and the amount of the ethylenebisstearamide added was 2g, and the test results showed that the infrared transmittance was high and the infrared resistance effect was poor; in examples 4 to 6, the infrared effect was tested by increasing the amount of the nanoscale metal oxide to 10g while maintaining the amount of the dispersant, and the test data shows that the infrared transmittance is significantly reduced, but the haze value is also increased, and the clarity of the lens is affected by too high haze; in order to reduce the haze, in examples 7-9, since the infrared transmittance is reduced more in examples 4-6, the amount of the nanoscale metal oxide added is kept unchanged, and the amount of the dispersant ethylene bis stearamide added is increased from 2g to 5g, so that the nanoscale metal oxide can be dispersed more uniformly, and the effects of reducing the haze value and the infrared transmittance are achieved, and experimental results show that the haze value is reduced from 3.8% -4.5% to 2.5% -3.4%, and the infrared transmittance is reduced correspondingly, wherein the optimal nanoscale metal oxide is tungsten oxide, and the optimal proportion is 10g of tungsten oxide and 5g of dispersant ethylene bis stearamide added in 10kg of PC material. Example 10 is compared with the best example 8, and in example 10, the addition amount of tungsten oxide and ethylene bis stearamide is increased at the same time, so as to reduce the infrared transmittance again and keep the haze stable, and the detection data shows that the infrared transmittance is 1.2% and the haze is 3.8%, compared with the best example 8, the infrared transmittance is reduced, the infrared ray resistant effect is better, but the haze is increased more, and the granulation and the PC material are diluted to prepare a finished lens product, so that the best example 8 is seen from the comprehensive data.

Comparative example granulation tests were also carried out with 10kg of PC material. In comparative examples 1 to 3, in comparison with the group (examples 1 to 3) in which the addition amount was the smallest in the examples, the haze value was significantly decreased, but the infrared transmittances were all 35% or more, and the anti-infrared effect was poor, as shown by the results of the tests in comparative examples 1 to 3 in which the addition amount of the nano-sized metal oxide was 5g and the addition amount of the dispersant was 1 g. Compared with the comparative examples 4-6 and the group (examples 7-9) in which the haze value and the 780-2000nm infrared transmittance are better integrated in the examples, the addition amount of the nanoscale metal oxide in the comparative examples 4-6 is 15g, and the addition amount of the dispersing agent is 9g, the detection result shows that the infrared transmittance is best up to 0.1%, the infrared ray resistant effect is good, but the haze value is also high, and the glass is not suitable for being used as a lens material.

In summary, 10kg of PC material is used for infrared-resistant master batch granulation, 8-13g of nano-scale metal oxide (tin antimony oxide or tungsten oxide or indium tin oxide) and 2-7g of ethylene bis-stearamide dispersant are added, wherein the optimal formula and ratio are 10kg of PC material, 10g of tungsten oxide and 5g of ethylene bis-stearamide for mixed granulation.

And the second table is a list of product performance tests of PC lenses with the thickness of 2.0mm prepared by selecting different infrared resistant master batches and PC plastic rice. Of these, examples 11 to 20 are examples in which PC lenses were produced using the infrared-resistant master batches of examples 1 to 10, and comparative examples 7 to 12 are comparative examples in which PC lenses were produced using the infrared-resistant master batches of comparative examples 1 to 6. Comparative example 13 is a comparative example of PC lenses made using a master batch common to the background art.

During testing, the infrared resistant master batch and the PC material are fixed and mixed and diluted according to the proportion of 1:4, and injection molding is carried out to form the infrared resistant lens. The data of the detection result are as follows:

watch two

Examples 11-20 are the results of tests performed on lenses prepared according to the method of making IR resistant lenses feasible according to the invention. From the analysis of the data of the test results, example 18 is the best preparation method, and the best infrared ray resistant effect can be achieved by combining PC with tungsten oxide and the dispersant ethylene bis stearamide.

Examples 11-13 were prepared by mixing the master batch of examples 1-3 in Table I with PC at a ratio of 1:4, stirring, and injection molding. The best data among examples 11-13 is example 12, which was examined as in table three and fig. 1, and the results showed that the infrared transmittance (780nm-2000nm) was 22.24%, the visible transmittance was 83.92%, the haze was 1.7%, the surface quality was good, no black spot was present, and the results passed the U, European and Australian standards.

Watch III

Examples 14 to 16 were prepared by mixing the master batches of examples 4 to 6 in Table I with PC in a ratio of 1:4, stirring, and injection molding. The best data among examples 14-16 is example 15, and the results, as measured in table four and fig. 2, show that the infrared transmittance (780nm-2000nm) is 13.41%, the visible transmittance is 81.00%, the haze is 2.1%, the surface quality is good, no black spot is included, and the results pass the U, European and Australian standards.

Watch four

Examples 17 to 19 were prepared by mixing the master batches of examples 7 to 9 in Table I with PC at a ratio of 1:4, stirring, and injection molding. The best data among examples 17-19 is example 18, which was examined as shown in table five and fig. 3, and the results showed 8.69% infrared transmittance (780nm-2000nm), 78.43% visible transmittance, 0.8% haze, good surface quality, no black spot contamination, passing U.S. standard, european standard and australian standard.

Watch five

Example 18 is the preparation of the best IR resistant lens by three group comparison.

Example 20 is prepared by mixing the master batch of example 10 in Table I with PC material at a ratio of 1:4, stirring, and injection molding. The results of the measurements shown in Table six and FIG. 4 show that the infrared transmittance (780nm-2000nm) is 6.38%, the visible transmittance is 76.96%, the haze is 2%, the surface quality is good, no black spot is present, and the black spot passes American, European and Australian standards. Example 20 is superior to best example 18 in the infrared ray resistance effect, but the haze value is higher and the visible light transmittance is lower.

Watch six

Comparative examples 7 to 9 are prepared by mixing and stirring the master batch of comparative examples 1 to 3 in Table I and PC material at a ratio of 1:4, and injection molding. The best data of comparative examples 7-9 is comparative example 8, which was examined as shown in table seven and fig. 5, and the results show that the infrared transmittance (780nm-2000nm) is 42.36%, the infrared transmittance is too high, the infrared ray resistant effect of the present invention is not exhibited, the visible transmittance is 86.74%, the haze is 0.5%, the surface quality is good, and no black spot impurity spots pass the U.S. mark, European mark and Australian mark.

Watch seven

Comparative examples 10 to 12 are prepared by mixing and stirring the master batch of comparative examples 4 to 6 in Table I and PC material at a ratio of 1:4, and injection molding. The best data in comparative examples 10-12 is comparative example 11, and the results are shown in table eight and fig. 6, wherein the infrared transmittance (780nm-2000nm) is 5.23%, the infrared ray resistant effect is significant, the visible transmittance is 74.78%, the visible transmittance is low, the haze is 6.5%, the haze is too high, the lens is opaque, the surface quality is good, no black spot impurity points exist, and the requirements of American standard, European standard and Australian standard cannot be met.

Table eight

Comparative example 13 is a PC lens made of a general master batch, and as shown in Table nine and FIG. 7, the results show that the infrared transmittance (780nm to 2000nm) is 10.97%, the visible transmittance is 82.20%, the haze value is 1.5% by American, European and Australian standards, and the haze is higher than that of best example 18 due to the poor dispersibility of the dispersant. And because the used dispersing agent is not high-temperature resistant, the master batch and the PC material are easy to be carbonized when being fused and injected, so that black spots and impurity spots are more, and the surface quality of the lens is influenced.

Watch nine

The above lens products meet the three national standards of American Standard ANSI Z80.3, 2018, European Standard EN ISO12312.1:2013 (A1: 2015), and Australian Standard (AN/NZS 1067, 2016).

The following table shows the comparative test result data of the lens manufactured in the best embodiment example 18 of the present invention, the general ir-resistant lens and the general PC lens, which are irradiated with the infrared thermal insulation tester for 1 minute with respect to the thermal insulation effect.

Example 18 the lens of example 18 was exposed to infrared radiation with minimal temperature difference between the environment below the lens and the environment above the lens, resulting in the best thermal insulation.

The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for manufacturing an anti-infrared high-energy heat-insulation spectacle lens is characterized by comprising the following steps:

firstly, drying Polycarbonate (PC) or Polyamide (PA) by adopting a dryer;

secondly, 8-15kg of the polycarbonate or polyamide dried in the first step is mixed with 8-13g of nano metal oxide and 2-7g of dispersant and stirred uniformly;

the nano-scale metal oxide is one or more of nano tin antimony oxide, nano tungsten oxide and nano indium tin oxide;

the dispersant is ethylene bis stearamide dispersant;

thirdly, heating, melting, shearing, conveying and extruding the mixed and stirred material obtained in the second step by a grain extractor, and cooling the material by a cooling water tank to form a strip-shaped material;

fourthly, cutting the strip-shaped material cooled in the third step into plastic particle samples through a granulating device to form cylindrical infrared-resistant master batches with an infrared-resistant function;

fifthly, drying the PC or PA plastic rice by a dryer;

sixthly, matching the infrared-resistant master batch prepared in the fourth step with the PC or PA plastic rice dried in the fifth step according to the proportion of 0.1kg-0.5kg of master batch to 1kg of plastic rice, and uniformly stirring by using a stirrer;

and seventhly, putting the mixed material stirred in the sixth step into a charging basket of an injection molding machine, and performing vacuum high-temperature high-pressure injection molding to form the infrared-resistant high-energy heat-insulation spectacle lens.

2. The method for manufacturing an anti-infrared high-energy thermal-insulation spectacle lens as claimed in claim 1, wherein in the first step, the drying temperature of polycarbonate PC or polyamide PA is 85-115 ℃, the drying time is 3-5 hours, and the water content is controlled to 0.03% -0.15%.

3. The method for manufacturing an anti-infrared high-energy thermal-insulating spectacle lens as claimed in claim 1, wherein the nano-scale metal oxide has a particle size of 10nm to 50 nm.

4. The method as claimed in claim 1, wherein the heating and melting temperature of the particle extractor is set at 235-280 ℃ and the power is 110 kw.

5. The method for manufacturing an anti-infrared high-energy thermal-insulation spectacle lens as claimed in claim 1, wherein in the fifth step, the drying temperature of PC or PA plastic is set to 90-120 ℃ for 2-4 hours, and the water content is controlled to 0.03% -0.15%.

6. The method for manufacturing an anti-infrared high-energy thermal-insulation spectacle lens as claimed in claim 1, wherein in the sixth step, 0.01g to 0.1g of toner is added to finally manufacture a colored spectacle lens.

7. The method as claimed in claim 1, wherein the seventh step is performed at a temperature of 280-320 ℃.

8. The method for manufacturing an anti-infrared high-energy heat-insulating spectacle lens as claimed in claim 1, wherein an eighth step is added, wherein the anti-infrared lens injection molded in the seventh step is cleaned and strengthened by a cleaning and strengthening machine;

and step nine, after strengthening, pre-drying and drying.

9. The method for manufacturing an anti-infrared high-energy thermal-insulation spectacle lens as claimed in claim 8, wherein the eighth step is that the cleaning tank is cleaned by ultrasonic waves and pure water, and the temperature of the cleaning tank is set to 55-85 ℃; strengthening by adopting strengthening liquid and carrying out strengthening operation in a soaking and pulling mode; the pulling speed is 70-180mm/min, and the temperature of the strengthening tank is 18-25 ℃.

10. The method for manufacturing an anti-infrared high-energy thermal-insulation spectacle lens as claimed in claim 8, wherein in the ninth step, the pre-drying temperature is 68-88 ℃, the pre-drying time is 5-10 minutes, the drying temperature is 95-120 ℃, and the drying time is 2-4 hours.