CN212009195U - Multilayer polyurethane composite lens - Google Patents

Abstract

The utility model relates to a multilayer polyurethane composite lens, which is completed by adopting a mode of alternately overlapping and bonding 6-80 layers of lenses, wherein the outermost two layers are polycarbonate lenses, and the interior of the lens is provided with polyurethane lenses or alternately overlapping the polycarbonate lenses and the polyurethane lenses; the lenses are bonded using a polyurethane adhesive. The special adhesive provided by the application is used for bonding, so that the lens is not broken under the strong impact of the steel ball with the weight of 16G +0.1G and the diameter of 16mm at the emission speed of 200 m/s in 20KG of nitrogen, and the lens has the requirement of a bulletproof function.

Description

Multilayer polyurethane composite lens

Technical Field

The utility model relates to a lens technical field, specific multilayer polyurethane composite lens that says so.

Background

At present, due to the particularity of the use environment, the impact resistance of the military protective glasses eyeshade is superior to that of other common protective glasses, and the explosion-proof military protective glasses eyeshade mainly adopts the CE EN166 and ANSI Z87.1 standards and conforms to the anti-impact regulations MIL-PRF-31013 and MIL-V-43511BP-10621 of American military rules bulletproof glasses. Meets the quality impact-resistant international standard: U.S. Standard Z78.1, military STD-662F and European Standard EN 166. The lens with the thickness of 2.8MM and the weight of 5G +0.1G can be manufactured by adopting the material imported from foreign countries, and the lens does not crack under the strong impact of the launching speed of 200 feet/second of steel balls with the diameter of 6MM under the condition of 20KG nitrogen. However, the protection requirement is far from sufficient for the mine-clearing soldiers. If a better protection effect is desired, the test standard is to reach the aim that the lens is not cracked under the strong impact of a steel ball with the weight of 16G +0.1G and the diameter of 16MM and the launching speed of 200 feet/second at the nitrogen of 20 KG.

According to the literature retrieval: chinese utility model patent publication No. CN 108957760 a relates to a novel explosion-proof AR glasses. A novel explosion-proof AR glasses is disclosed. Including AR glasses body, the material of the following part of AR glasses body is copper alloy or stainless steel that have explosion-proof ability: picture frame, mirror leg and mirror foot, the embedded lens group that is equipped with of picture frame, the lens is organized and is equipped with the explosion-proof lens of PC. CN 205049825U, PC polymer bulletproof polarizing glasses. The PC polymer bulletproof polarized glasses comprise an upper lens and a lower lens, a polarizing film is arranged between the upper lens and the lower lens, the upper lens comprises an upper lens upper bend and an upper lens lower bend, the radius of an arc plate of the upper lens upper bend is millimeter, the radius of the arc plate of the upper lens lower bend is millimeter, the polarizing film comprises a polarizing film upper bend and a polarizing film lower bend, the radius of the arc plate of the polarizing film upper bend is 97.6666 millimeter, the radius of the arc plate of the polarizing film lower bend is 97.5666 millimeter, the lower lens comprises a lower lens upper bend and a lower lens lower bend, the radius of the arc plate of the lower lens upper bend is 97.5666 millimeter, and the radius of the arc plate of the lower lens lower bend is 96.5666 millimeter. The utility model discloses a bulletproof polarizing glasses of PC polymer's advantage is: the PC polymer bulletproof polarizing glasses are firm in structure, high in overall strength, not prone to abrasion of the polarizer and long in service life.

Chinese utility model patent application No. CN201921038831 relates to a multifunctional bulletproof helmet; the patent discloses a bulletproof helmet, in particular to a multifunctional bulletproof helmet, which aims at the problem that the prior device has no protective device for the illuminating lamp and the camera, when working in the field with more branches in daytime, the branches are easy to scrape and touch in the moving process to cause the damage of the camera and the illuminating lamp, and the camera and the illuminating lamp easily fall dust, and need to be cleaned again in each use, thus solving the problem of complexity, and the following proposal which comprises a helmet is provided, one side of the helmet is provided with the illuminating lamp, the camera is arranged in the illuminating lamp, one side of the helmet is fixedly provided with a T-shaped fixed column, the utility model can protect the camera and the illuminating lamp by arranging a protective cover, prevent the camera and the illuminating lamp from being damaged by impact, when the protective cover is opened by pulling an L-shaped pull rod in use, the strip-shaped cleaning brush moves upwards to clean the lens of the illuminating lamp and the camera, the use requirements of people are met.

The research on the bulletproof lenses is found in China by searching documents, and many of the researches are based on the application research of PC materials, and the PC materials have strong impact resistance. The impact strength of the PC material is related to the thickness of the lens, the thicker the lens is, the stronger the impact resistance is, the PC sheet with enough thickness can prevent bullets (the thickness of the PC sheet in the bulletproof glass is 2cm, which is absolute bullet-proof), the bulletproof glasses which are called at present refer to a bulletproof sheet, but not bullet-proof, because the thickness of the lens cannot be 2cm, the thickness is too thick, therefore, the optimal thickness of the PC lens is the key of the design of the goggles, and the bulletproof sheet with certain strength can be prevented from impacting and is in the allowable range of the design of the glasses. However, if the lens is made to a thickness of 2.8mm or less, the lens cannot meet the requirement of ballistic resistance. This patent is accomplished through adopting 3-100 layers lens stack bonding's mode in turn, and the outermost two-layer polycarbonate lens that uses, inside uses the polyurethane lens or the stack in turn of polycarbonate lens and polyurethane lens, and norbornane diisocyanate and the pentaerythrityl ester of tetra (3-mercaptopropionic acid) that the polyurethane lens adopted polymerize under the organic tin catalyst effect and form. The lenses are bonded using a polyurethane adhesive. The polyurethane adhesive is mainly prepared from the following components in percentage by weight: 15-25 parts of benzhydrylpropane diisocyanate, 15-25 parts of 2, 6-toluene diisocyanate, one or more dihydroxy polyether polyols, 3000, 20-50 parts of molecular weight 1000-one, 0.5-1.5 parts of chain extender, 0.5-1.5 parts of organic tin catalyst, 20-40 parts of NN dimethylformamide and 19-38 parts of xylene. Through the utility model provides a compound lens of compound polycarbonate of adhesive and polyurethane can be 16G +0.1G through weight, and the diameter is under the powerful impact of launching velocity for 200 meters/second when nitrogen gas 20KG for 16 mm's steel ball, and the lens does not break, and the lens has the requirement of shellproof function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a compound lens of multilayer polyurethane.

The purpose of the utility model is realized through the following technical scheme:

a multilayer polyurethane composite lens is completed by adopting a mode of alternately overlapping and bonding 6-80 layers of lenses, wherein the outermost two layers are polycarbonate lenses, and the interior of the lens is provided with polyurethane lenses or alternately overlapping the polycarbonate lenses and the polyurethane lenses; the lenses are bonded using a polyurethane adhesive.

The thickness of the polycarbonate lens ranges from 0.2 mm to 2 mm, and the curvature radius of the lens surface curvature ranges from 50 m to 20000 m.

The thickness range of the polyurethane lens is 0.2-2 mm, and the curvature radius range of the lens surface curvature is 50-20000 mm.

Compared with the prior art, the utility model has the positive effects that:

compared with the prior art, this application is accomplished through the mode of 6 ~ 80 layers lens stack bonding in turn, the polycarbonate lens is used to outermost two-layer, interior use polyurethane lens or the stack in turn of polycarbonate lens and polyurethane lens, bond through the specific adhesive that this application provided at last, can be 16G +0.1G through weight, the diameter is under the powerful impact that emission speed is 200 meters/second when nitrogen gas 20KG for 16 mm's steel ball, the lens does not break, the lens has bulletproof function's requirement.

Drawings

Fig. 1 is a schematic structural diagram of the present application.

The labels in the figures are:

1: a polycarbonate lens, a high-strength polycarbonate lens,

2: a polyurethane lens;

3: a polyurethane adhesive.

Detailed Description

The following provides a specific embodiment of the multi-layer polyurethane composite lens of the present invention.

Referring to the attached figure 1, the multilayer polyurethane composite lens is completed by adopting a mode of alternately overlapping and bonding 6-80 layers of lenses, wherein the outermost two layers are polycarbonate lenses 1, and polyurethane lenses or the alternating overlapping of the polycarbonate lenses and the polyurethane lenses 2 are used in the inner part; the bonding between the lenses was with a polyurethane adhesive 3. The following description will be given with reference to specific examples.

Example 1

Preparation of polyurethane adhesive: accurately weighing dihydroxy polyether polyol with the molecular weight of 2000, 20 g; NN dimethylformamide, 12 g; xylene, 12.5 grams; 0.5 g of chain extender; 0.5 g of catalyst is put into a reaction kettle in sequence, after being stirred evenly for 30 minutes, 10.5 g of benzhydrylpropane diisocyanate and 10.5 g of 2, 6-toluene diisocyanate are added. After the addition, the mixture was heated to 70 ℃ with stirring, and reacted at 70 ℃ for 5 hours. The remaining 4.5 g of benzhydrylpropane diisocyanate and 4.5 g of 2, 6-tolylene diisocyanate were added in four portions with 10 minute intervals, and then the viscosity of the reaction solution was monitored, and when the viscosity reached 100CPS (25 degrees), NN dimethylformamide was added in 12 g; xylene, 12.5 g. And (5) continuously reacting until the viscosity reaches 100CPS (25 degrees). 6 polycarbonate lenses are prepared by injection molding, the thickness of the lens is 0.2 mm, and the curvature radius range of the lens surface curve is 10000 mm. The polyurethane lens is prepared by polymerizing norbornane diisocyanate and pentaerythritol tetra (3-mercaptopropionate) under the action of dibutyltin dichloride, and 5 polymerized lenses are provided, the thickness of the lens is 0.2 mm, and the curvature radius range of the lens surface curvature is 10000 mm. And finally, gluing, tabletting and curing by adopting a tabletting machine, wherein the polycarbonate lens is arranged on the outermost layer, and the middle layer is subjected to surface mounting in a mode of alternately overlapping the polycarbonate lens and the polyurethane lens. Finally, the multilayer polyurethane composite lens with 11-layer structure is obtained. The lens is impacted by a strong force with the weight of 16G +0.1G and the launching speed of a steel ball with the diameter of 16mm at the nitrogen of 20KG, the impact is first intact, and the lens has a good bulletproof function.

Example 2

Preparation of polyurethane adhesive: accurately weighing dihydroxy polyether polyol with the molecular weight of 2000, 20 g; NN dimethylformamide, 12 g; xylene, 12.5 grams; 0.5 g of chain extender; 0.5 g of catalyst is put into a reaction kettle in sequence, after being stirred evenly for 30 minutes, 10.5 g of benzhydrylpropane diisocyanate and 10.5 g of 2, 6-toluene diisocyanate are added. After the addition, the mixture was heated to 70 ℃ with stirring, and reacted at 70 ℃ for 5 hours. The remaining 4.5 g of benzhydrylpropane diisocyanate and 4.5 g of 2, 6-tolylene diisocyanate were added in four portions with 10 minute intervals, and then the viscosity of the reaction solution was monitored, and when the viscosity reached 100CPS (25 degrees), NN dimethylformamide was added in 12 g; xylene, 12.5 g. And (5) continuously reacting until the viscosity reaches 100CPS (25 degrees). 12 polycarbonate lenses are prepared by injection molding, the thickness of the lens is 0.1 mm, and the curvature radius range of the lens surface curve is 10000 mm. The polyurethane lens is prepared by polymerizing norbornane diisocyanate and pentaerythritol tetra (3-mercaptopropionate) under the action of dibutyltin dichloride, wherein the thickness of the polymerized lens is 0.1 mm, and the curvature radius range of the surface curvature of the lens is 10000 mm. And finally, gluing, tabletting and curing by adopting a tabletting machine, wherein the polycarbonate lens is arranged on the outermost layer, and the middle layer is subjected to surface mounting in a mode of alternately overlapping the polycarbonate lens and the polyurethane lens. Finally, the multilayer polyurethane composite lens with 11-layer structure is obtained. The lens is impacted by a strong force with the weight of 16G +0.1G and the launching speed of a steel ball with the diameter of 16mm at the nitrogen of 20KG, the impact is first intact, and the lens has a good bulletproof function.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as within the protection scope of the present invention.

Claims (4)

1. A multilayer polyurethane composite lens is characterized in that the multilayer polyurethane composite lens is formed by alternately overlapping and bonding 6-80 layers of lenses, the two outermost layers are polycarbonate lenses, and the interior of the multilayer polyurethane composite lens is provided with polyurethane lenses or the alternating overlapping of the polycarbonate lenses and the polyurethane lenses; the lenses are bonded using a polyurethane adhesive.

2. The multi-layer polyurethane composite lens of claim 1, wherein the thickness of the polycarbonate lens is in the range of 0.2 mm to 2 mm, and the radius of curvature of the lens surface curvature is in the range of 50 m to 20000 m.

3. The multi-layer polyurethane composite lens of claim 1, wherein the polyurethane lens has a thickness in the range of 0.2 mm to 2 mm and a radius of curvature of the lens surface curvature in the range of 50 mm to 20000 mm.

4. The multi-layer polyurethane composite lens of claim 1, wherein 11 layers of lenses are alternately laminated and bonded together.

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