阅读说明：本技术 一种军工用激光防护镜片的制备工艺 (Preparation process of laser protection lens for military industry ) 是由 吴天恕 吴彦廷 简志仰 于 2020-12-24 设计创作，主要内容包括：本发明涉及一种军工用激光防护镜片的制备工艺,包括以下步骤：(1)按重量份数称取各原材料；(2)低温注塑：将各原材料依次加入注塑成型机中,注塑温度控制在230-260℃,注塑时间30-40s,注塑成型；(3)脱水：将步骤(2)获得的产品加入离心式除湿干燥机中进行脱水,脱水温度控制在110-125℃,时间烘干4小时以上,获得成品。本发明低温注塑温度控制在235-255℃,确保镜片红外效果得到最佳的保证,并且,本发明通过加入除湿干燥强脱水效果,使得镜片密度均匀,避免彩虹效应。(The invention relates to a preparation process of a laser protection lens for military industry, which comprises the following steps: (1) weighing the raw materials in parts by weight; (2) low-temperature injection molding: sequentially adding the raw materials into an injection molding machine, controlling the injection molding temperature at 230-260 ℃, and performing injection molding for 30-40 s; (3) and (3) dehydrating: and (3) adding the product obtained in the step (2) into a centrifugal dehumidification dryer for dehydration, controlling the dehydration temperature at 110-125 ℃, and drying for more than 4 hours to obtain a finished product. The low-temperature injection molding temperature is controlled to be 235-255 ℃, the infrared effect of the lens is guaranteed to be best, and the lens is uniform in density and free of rainbow effect by adding dehumidification and drying to enhance the dehydration effect.)

1. A preparation process of a laser protection lens for military industry is characterized by comprising the following steps:

(1) weighing the raw materials in parts by weight;

(2) low-temperature injection molding: sequentially adding the raw materials into an injection molding machine, controlling the injection molding temperature at 230-260 ℃, and performing injection molding for 30-40 s;

(3) and (3) dehydrating: and (3) adding the product obtained in the step (2) into a centrifugal dehumidification dryer for dehydration, controlling the dehydration temperature at 110-125 ℃, and drying for more than 4 hours to obtain a finished product.

2. The preparation process of the laser protection lens for military industry as claimed in claim 1, wherein the injection molding temperature in step (2) is controlled at 235-.

3. The process for preparing the laser protection lens for military industry according to claim 1, wherein the injection molding in the step (2) adopts a multi-stage injection molding process:

the first stage is low pressure below 65bar, and 1-30% of low-speed injection is controlled;

the second stage is low pressure below 65bar, and low-speed ejection of 1-30% is controlled;

the three sections are medium-pressure or high-pressure, and are controlled to be ejected at a medium speed of 30-55% or a high speed of more than 55%;

the fourth stage is low pressure or medium pressure, and the low speed of 1-30% or the medium speed of 30-55% is controlled to eject;

the fifth section is low pressure or medium pressure, and controls 1-30% of low-speed ejection.

4. The process for preparing the laser protection lens for military industry according to claim 1, wherein the dehydration temperature in the step (3) is controlled at 120 ℃ and the drying time is more than 4 hours.

5. The process for preparing the laser protective lens for military industry according to any one of claims 1 to 4, wherein the raw materials comprise 100000 parts of PC substrate, 214 parts of infrared absorbent 1125, 85.6 parts of blue light absorbent yellow GG, 199 parts of green light absorbent 8150 and 3.35 parts of enhanced green light absorbent 8315.

6. The process for preparing laser protection lens for military industry according to claim 5, wherein the PC substrate is PC 302-4 of Sumitomo corporation of Japan.

7. The process for preparing laser protective lens for military use of claim 5, wherein said infrared absorbent 1125 is an infrared absorbent 1125 from EPOLIGHT corporation.

8. The preparation process of the laser protection lens for military industry according to claim 5, wherein the blue light absorber yellow GG is blue light absorber yellow-GG of BM company.

9. The process for preparing the laser protection lens for military industry according to claim 5, wherein the green light absorber 8150 is green light absorber 8150 of Saha corporation.

10. The process for preparing laser protection lens for military industry according to claim 5, wherein the enhanced green light absorber 8315 is red-8315 of Saha corporation.

Technical Field

The invention relates to the technical field of lenses, in particular to a preparation process of a laser protection lens for military industry.

Background

The laser protective glasses are simply special glasses capable of preventing or reducing the harm of laser to human eyes. The laser protective glasses are a high-efficiency safety goggles, suitable for various lasers and laser pens, and are comfortable, beautiful, safe and reliable to wear, suitable for laser operators, computer operators, drivers, gas welders, electric welders, high-temperature furnace operators, medical or industrial personnel to operate X-ray fluoroscopy and other personnel and occasions, and also suitable for ultraviolet lasers, excimer lasers, neodymium glass lasers, semiconductor lasers, CO lasers, neodymium-doped garnet lasers, ruby lasers, CO lasers₂Laser, gallium arsenide laser, and the like.

The laser protective glasses have various types, different materials, different principles and different application occasions. Military supplies are special products for military purposes, have special technical index requirements, for example, the requirements of laser protective lenses need to simultaneously protect lasers with the wavelength of 532nm and the wavelength of 1064nm, which cannot be realized by the prior art, and the laser protective lenses in the prior art cannot ensure color balance while filtering laser wavelength, and cannot achieve proper visible light transmittance.

Disclosure of Invention

In order to solve the technical problems and achieve the aim of military use of the laser protection lens, the invention provides a preparation process of the laser protection lens for military use.

The specific scheme is as follows:

a preparation process of a laser protective lens for military industry comprises the following steps:

(1) weighing the raw materials in parts by weight;

(2) low-temperature injection molding: sequentially adding the raw materials into an injection molding machine, controlling the injection molding temperature at 230-260 ℃, and performing injection molding for 30-40 s;

(3) and (3) dehydrating: and (3) adding the product obtained in the step (2) into a centrifugal dehumidification dryer for dehydration, controlling the dehydration temperature at 110-125 ℃, and drying for more than 4 hours to obtain a finished product.

Further, the injection molding temperature in the step (2) is controlled at 235-.

Further, the injection molding in the step (2) adopts a multi-section injection molding process:

the first stage is low pressure below 65bar, and 1-30% of low-speed injection is controlled;

the second stage is low pressure below 65bar, and low-speed ejection of 1-30% is controlled;

the three sections are medium-pressure or high-pressure, and are controlled to be ejected at a medium speed of 30-55% or a high speed of more than 55%;

the fourth stage is low pressure or medium pressure, and the low speed of 1-30% or the medium speed of 30-55% is controlled to eject;

the fifth section is low pressure or medium pressure, and controls 1-30% of low-speed ejection.

Further, the dehydration temperature of the step (3) is controlled at 120 ℃, and the drying time is more than 4 hours, so as to reduce the moisture and facilitate the forming.

Further, the raw material includes 100000 parts of a PC base material, 214 parts of an infrared absorber 1125, 85.6 parts of a blue light absorber yellow GG, 199 parts of a green light absorber 8150, and 3.35 parts of an enhanced green light absorber 8315.

Further, the PC substrate is PC 302-4 of Sumitomo corporation of Japan.

Further, the infrared absorber 1125 is an infrared absorber 1125 manufactured by EPOLIGHT corporation.

Further, the blue light absorber yellow GG is a blue light absorber yellow-GG of BM Co.

Further, the green light absorber 8150 is a green light absorber 8150 of sihe corporation.

Further, the enhanced green light absorber 8315 is six and company red-8315.

Wherein:

the invention creatively adopts a low-temperature injection molding process: controlling the injection molding temperature at 235-255 ℃ and the injection molding time for 35 s. The 35 second low temperature molding cycle is based on the thermal sensitivity of the infrared absorbent 1125 toner and is comprehensively set by combining the cooling effect of the multi-stage injection molding process, thereby realizing the optimal internal stress of the lens and reducing the rainbow phenomenon.

Infrared rayAbsorbent 1125 with a basic color of bright greenish-yang and a molecular formula of C₂₈H₂₂N₂O₂The super-strong green light factor has good absorption function for near infrared light with wavelength of 780-1400nm and far infrared light with wavelength of 1400-2000 nm.

The blue light absorber yellow GG has yellow basic color and molecular formula C₁₂H₁₃BrN₂O₂The yellow light factor contained in the pigment has absorption effect on the blue light with stronger wavelength of 400-450 nm.

Green light absorbent 8150 with orange color as basic color and molecular formula C₁₀H₁₀N₂O, the contained orange/yellow light factor has absorption function for cyan light with the wavelength of 450-535 nm and green visible light with the wavelength of 500-535 nm.

The enhanced green light absorber 8315 has a basic color of orange red, contains an orange red light factor, and has a chemical formula: c₁₈H₆CI₄N₂O, which mainly enhances the absorption effect of the green light with the wavelength of 510-535 nm.

The multiple optical factors act together to supplement each other, so that the light wave energy filtering effect is achieved, and the laser protection function is realized.

In addition, in the amount of the absorber, the color of the lens is determined to be necessarily amber in order to generate the filtering effect simultaneously for the wavelengths of 532nm and 1064 nm. The amber is the result of producing polychromatic light by adding green light factor as infrared filtering effect and producing color superposition after filtering blue and green visible light as infrared light. At the front end of visible light, 400-535nm is used for preventing and filtering blue light and green light, at 780-2000nm, especially for filtering 1064nm, an infrared absorbent pigment with the property of green light is added, which seems to be contradictory to each other, and finally, the balance and the unification are achieved, which is the same as the natural development law, and the final technical effect is that the lens can realize the standard of 12-22% in the transmittance of the visible light, and also can play a certain light supplement effect in a weak light environment under the night vision condition, increase the light and shade contrast, and is convenient for identifying the target in the environment.

The PC base material of the invention is selected from PC 302-4 base materials of Nippon Sumitomo company, which is known as polycarbonate resin, has good impact resistance and the characteristics of high molecular polymer, the molecular weight reaches more than 32000, the thermal stability is good, and the hydrolysis temperature can reach 425 ℃ (797 DEG F). It is preferred because the product of the invention needs to meet the ballistic fragmentation criteria of military impact: namely, the ballistic fragmentation protection tester MIL-PRF-3242-2017 is adopted to meet the standards ANSI/ISEA Z87.1+, "BS EN 166-20027.2.2", "AS/NZS 1337-2010Z 94.3-07", and the Sumitomo chemical PC 302-4 can meet the high-speed impact performance requirements specified by the standards.

The thickness of the center of the lens is 2.8mm, the thickness of the optical center of 2.8mm is designed based on human engineering by combining optical prism power and astigmatism power to meet indexes, and meanwhile, the impact resistance of the lens is considered, and the comfort level of a wearer is reviewed to realize the best effect of the invention.

Tests show that the lens can simultaneously filter laser with the wavelength of 532nm and the wavelength of 1064 nm. Wherein:

the wavelength of 532nm is the critical point position of the green light and the yellow light of the visible light, namely the boundary point of the green light and the yellow light of the visible light, and is the key point for judging the cutoff degree of the green light from the distribution of the spectrum wavelength;

and 1064nm, which is the point in the infrared spectrum where the energy of the near infrared light is the strongest.

The two wavelength points are selected as indexes and are verified based on the characteristics of laser and a test of a light emitting principle, the laser is based on a monochromatic light principle, the energy is strong, the protection degree reaches over 99.9 percent, the light transmittance of a measured value corresponding to the index point of the index is less than or equal to 0.1 percent, and the color of the laser is determined by an excited material so as to meet the protection requirement of military standard.

Has the advantages that:

1. the temperature adopted in the traditional process during injection molding is 280-310 ℃, and the infrared factors can be damaged when the infrared factors cannot resist high temperature, so that the lens is yellow, and the color effect and the filtering effect are lost; the low-temperature injection molding temperature is controlled to be 235-255 ℃, so that the infrared effect of the lens is ensured to be best guaranteed.

2. The lens has uniform density by adding the dehumidifying and drying strong dewatering effect, and avoids rainbow effect (if the lens has high humidity, the lens has non-uniform density, and the internal stress of the lens is inconsistent, so that the optical rainbow effect is caused, the impact resistance of the lens is reduced, the strength is reduced, and no buffer effect is generated).

3. The lens can simultaneously filter laser with two special wavelengths of 532nm and 1064nm, the light transmittance is less than or equal to 0.1 percent, and the military standard protection requirement is met.

4.532nm laser and visible light (the wavelength is between 780 and 400 nm) are overlapped, in order to effectively avoid the influence of filter distortion on adaptability of a wearer, the product can realize the standard of 12 to 22 percent in the aspect of visible light transmittance (the international eyeglass standard stipulates that the transmittance is lower than 8 percent and the product is not suitable for walking).

Drawings

Fig. 1 shows the laser protection light transmittance and visible light transmittance of the inventive lens.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The invention will now be further described with reference to the accompanying drawings and detailed description.

Example 1:

a preparation process of a laser protective lens for military industry comprises the following steps:

(1) weighing the following raw materials in parts by weight: 100000 parts of a PC base material, 214 parts of an infrared absorbent 1125, 85.6 parts of a blue light absorbent yellow GG, 199 parts of a green light absorbent 8150, and 3.35 parts of an enhanced green light absorbent 8315;

(2) low-temperature injection molding: sequentially adding the raw materials into an injection molding machine, controlling the injection molding temperature at 235-255 ℃ and the injection molding time at 35s, and performing injection molding by adopting a multi-section injection molding process:

the first stage is low pressure below 65bar, and 1-30% of low-speed injection is controlled;

the second stage is low pressure below 65bar, and low-speed ejection of 1-30% is controlled;

the three sections are medium-pressure or high-pressure, and are controlled to be ejected at a medium speed of 30-55% or a high speed of more than 55%;

the fourth stage is low pressure or medium pressure, and the low speed of 1-30% or the medium speed of 30-55% is controlled to eject;

the fifth section is low pressure or medium pressure, and 1-30% of low-speed injection is controlled;

(3) and (3) dehydrating: and (3) adding the product obtained in the step (2) into a centrifugal dehumidification dryer for dehydration, controlling the dehydration temperature at 120 ℃, and drying for more than 4 hours to obtain a finished product so as to reduce the moisture and facilitate molding.

And (4) analyzing results:

referring to FIG. 1, the low-temperature injection temperature of the invention is controlled at 235-255 ℃, and the key requirement that the index coefficients are less than or equal to 0.1% at the corresponding points of 532nm and 1064nm wavelength can be simultaneously achieved.

In addition, the lens has uniform density and avoids rainbow effect by adding dehumidification and drying strong dehydration effect, and is applied to welding helmets, glasses, goggles and mask products for military industry and the like, and the ballistic breakage standard of military rule impact is adopted: the performance of the product of the invention is tested by a ballistic fragmentation protection tester MIL-PRF-3242-2017 with the standard number ANSI/ISEA Z87.1+, "BS EN 166-20027.2.2," AS/NZS 1337-2010Z94.3-07 ", and the test results are AS follows: the product of the invention meets the ballistic breakage standard of military standard impact.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.