CN111393031B

CN111393031B - Etching solution for preparing filter glass and preparation method of filter glass

Info

Publication number: CN111393031B
Application number: CN202010204006.6A
Authority: CN
Inventors: 熊国祥
Original assignee: Zhengzhou Hiho Optical Technology Co ltd
Current assignee: Zhengzhou Hiho Optical Technology Co ltd
Priority date: 2020-03-21
Filing date: 2020-03-21
Publication date: 2022-02-15
Anticipated expiration: 2040-03-21
Also published as: CN111393031A

Abstract

The invention belongs to the technical field of glass chemical etching, and particularly relates to an etching solution for preparing filter glass and a preparation method of the filter glass. The etching solution for preparing the filter glass comprises the following raw materials in percentage by mass: 5-10% of ammonium bifluoride, 4-6% of ammonium fluoride, 12-18% of sulfuric acid, 15-28% of hydrofluoric acid, 3-8% of phosphoric acid, 4-8% of copper sulfate, 0.5-0.8% of borax, 10-25% of cane sugar and 5-20% of water. The etching solution is adopted to process glass to prepare the filter glass meeting the use requirements of medical instruments.

Description

Etching solution for preparing filter glass and preparation method of filter glass

Technical Field

The invention belongs to the technical field of glass chemical etching, and particularly relates to an etching solution for preparing filter glass and a preparation method of the filter glass.

Background

At present, the filter used on domestic medical instruments generally uses resin coating filters, and the resin coating filters have the defects of poor mechanical strength, poor scratch resistance, extreme aging attenuation, dust adsorption, short service life and the like, greatly influence the stability and consistency of light source transmission, bring serious consequences of inaccurate detection data to detection equipment, lead the detection equipment to be in a rough detection level, are not beneficial to improving the precision of the detection data, and seriously restrict the clinical effect of the medical instruments.

Disclosure of Invention

The invention provides an etching solution for preparing filter glass, which can be used for preparing the filter glass meeting the use requirements of medical instruments, and further solves the problem that the resin coating filter glass in the prior art can not meet the requirements of detection equipment.

The second purpose of the invention is to provide a preparation method of the filter glass.

The third purpose of the invention is to provide a filter glass.

A fourth object of the present invention is to provide an optical filter.

The invention also aims to provide a medical device.

The etching solution for preparing the filter glass adopts the following technical scheme: an etching solution for preparing filter glass comprises the following raw materials in percentage by mass: 5-10% of ammonium bifluoride, 4-6% of ammonium fluoride, 12-18% of sulfuric acid, 15-28% of hydrofluoric acid, 3-8% of phosphoric acid, 4-8% of copper sulfate, 0.5-0.8% of borax, 10-25% of cane sugar and 5-20% of water.

The preparation method of the filter glass adopts the following technical scheme: the preparation method of the filter glass adopts the etching solution to etch the glass original sheet.

Preferably, the method comprises the following steps: (1) pretreating the glass original sheet; (2) placing the glass original sheet obtained by the treatment in the step (1) in the etching solution, and after swinging for 3-5s, standing the glass original sheet and reacting with the etching solution;

(3) and after the etching reaction is finished, taking out the glass original sheet, cleaning the glass original sheet by using an acid solution to enable attachments on the surface of the glass original sheet to fall off, and cleaning and drying by using pure water to obtain the filter glass. Wherein, the standing time of the glass original sheet in the step (2) needs to be determined by combining the environmental temperature and the technical parameter index requirements of the manufactured filter lens.

Preferably, the time for the glass original sheet to stand in the step (2) is 1-5min, and the temperature of the etching solution is 12-15 ℃.

Preferably, the pretreatment is to clean the surface of the glass original sheet by using an acid solution and pure water sequentially.

Preferably, the acid solution is a mixed solution of hydrofluoric acid and sulfuric acid.

The filter glass adopts the following technical scheme: the filter glass is prepared by adopting the preparation method of the filter glass.

Preferably, the filter glass has the gloss of 45-50%, the light transmittance of 52-58%, the haze of 50-55%, the roughness of 2.0-2.5 μm and the reflectivity of 3.5-4.0%.

The filter adopts the following technical scheme: an optical filter, the raw material for manufacturing the optical filter comprises the filter glass as described in any one of the above.

The medical equipment adopts the following technical scheme: a medical device, a component of which comprises a filter glass as described in any one of the preceding claims or an optical filter as described above.

The invention has the beneficial effects that: aiming at the characteristic index requirements of the filter glass, the invention refers to the experience of etching frosting of other types of glass in the past, makes adjustment and innovation on the selection and proportion of raw materials, applies proper etching raw materials into etching solution, and dopes proper surface active substances (borax) and acid and alkali resistant viscosity regulator (cane sugar), realizes the etching treatment on the surface of the soda-lime glass through proper formula proportion, can form polyhedral microcrystalline particles which are uniformly distributed in a point shape on the surface of the glass, changes the direction and angle of light penetrating through the glass material, enables the prepared glass product to meet the special requirements of various detection equipment on light source output and input, and improves the precision and accuracy of detection data of the detection equipment.

Surface active substance borax Na₂B₄O_7·10H₂O can reduce the surface tension of the liquid medicine, enhance the affinity of the liquid medicine and the glass surface, promote the formation of crystal nuclei and the refinement of crystal grains, and enable an etching layer to be more uniform and finer; the sucrose is added into the etching solution, so that the viscosity of the liquid medicine can be effectively adjusted, the insoluble filler in the etching solution is uniformly dispersed in the solution, the stability of the etching solution is improved, the etching reaction speed of the glass can be adjusted, and the glucose molecule is provided with a plurality of hydroxyl groups which are easy to form hydrogen bonds with sulfuric acid and the glass, so that the glucose can be used as a medium for the reaction between the sulfuric acid and the surface of the glass, and the reaction speed and the uniformity of the surface reaction can be controlled, thereby achieving a more ideal filtering effect.

The preparation method of the filter glass has simple and practical process, easy operation and low cost, the particles on the surface of the prepared filter glass are uniformly distributed and have consistent size, the technical indexes of roughness, glossiness, light transmittance, haze and the like meet the specific requirements of the medical instrument and equipment industry, and the prepared filter glass has excellent effect on the aspect of filter performance.

The filter glass can meet the specific requirements of medical equipment on the performance indexes of the filter, overcomes the defects of poor product strength, short service life, easy aging and the like caused by the traditional resin coating process, realizes the purpose of preparing the filter glass by using a frosting etching process, and enhances the scratch resistance, the strength and the service life of the filter product.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

1. The special etching solution (wt%) for the filter glass is prepared according to the following formula: NNH₄HF₂ 5.8％、NH₄F 4.2％、H₂SO₄ 12.6％、 HF 26.3％、H₃PO₄ 3.7％、CuSO₄ 4.5％、Na₂B₄O_7·10H₂0.5% of O, 23% of sucrose and H₂19.4 percent of O; h is to be₂SO₄Slowly adding the solution into water to prevent splashing, sequentially adding other raw materials after the solution is uniformly stirred and cooled, then fully and uniformly stirring, and starting the etching treatment work of the glass sheet after all the raw materials are fully dissolved and the solution is in a transparent state.

2. Pretreating the glass sheet in a pretreatment solution (a mixed solution of dilute sulfuric acid and hydrofluoric acid), cleaning and drying.

3. And quickly immersing the cleaned, dried and cooled glass original sheet into etching solution special for the filter glass (the temperature of the etching solution is controlled to be 12-15 ℃), swinging for 3-5 seconds, and standing for 3 minutes to allow the etching solution to fully react with the glass original sheet.

4. And taking out the etched glass, immediately cleaning the glass in an acid solution (a mixed solution of dilute sulfuric acid and hydrofluoric acid) according to a certain proportion to remove a reaction attachment layer, then cleaning the glass in pure water, and drying the glass after cleaning to obtain the finished product of the filter glass meeting the use requirements of medical equipment.

Example 2

1. The special etching solution (wt%) for the filter glass is prepared according to the following formula: NNH₄HF₂ 6.8％、NH₄F 4.0％、H₂SO₄ 14.5％、 HF 27.5％、H₃PO₄ 4.6％、CuSO₄ 4.8％、Na₂B₄O_7·10H₂0.5% of O, 25% of sucrose and H₂O 12.3 percent; h is to be₂SO₄Slowly adding the solution into water to prevent splashing, sequentially adding other raw materials after the solution is uniformly stirred and cooled, then fully and uniformly stirring, and starting the etching treatment work of the glass sheet after all the raw materials are fully dissolved and the solution is in a transparent state.

2. Pretreating the glass sheet in a pretreatment solution, cleaning and drying.

3. And quickly immersing the cleaned, dried and cooled glass original sheet into etching solution special for the filter glass (the temperature of the etching solution is controlled to be 12-15 ℃), swinging for 3-5 seconds, and standing for 4 minutes to allow the etching solution to fully react with the glass original sheet.

4. And taking out the etched glass, immediately washing the glass in an acid solution with a certain proportion to remove a reaction attachment layer, then washing the glass in pure water, and drying the glass after the glass is washed, thus obtaining the finished product of the optical filtering glass which meets the use requirements of medical equipment.

The glossiness, light transmittance, haze, roughness and reflectivity of the filter glass prepared in example 1-2 were measured, and the measurement results are shown in table 1 below:

TABLE 1

Sample (I)	Gloss (%)	Light transmittance (%)	Haze (%)	Roughness (μm)	Reflectance (%)
						Soda-lime glass original sheet	110.8	96.5	0.08	0	8.8
Example 1	48.2	55.6	52.3	2.1	3.8
						Example 2	46.5	53.8	54.5	2.2	3.6

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, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The etching solution for preparing the filter glass is characterized by comprising the following raw materials in percentage by mass: 5-10% of ammonium bifluoride, 4-6% of ammonium fluoride, 12-18% of sulfuric acid, 15-28% of hydrofluoric acid, 3-8% of phosphoric acid, 4-8% of copper sulfate, 0.5-0.8% of borax, 10-25% of cane sugar and 5-20% of water.

2. A method for producing a filter glass, characterized in that a glass original is subjected to etching treatment using the etching solution according to claim 1.

3. The method for producing a filter glass according to claim 2, comprising the steps of: (1) pretreating the glass original sheet; (2) placing the glass original sheet obtained by the treatment in the step (1) in the etching solution, and after swinging for 3-5s, standing the glass original sheet and reacting with the etching solution; (3) and after the etching reaction is finished, taking out the glass original sheet, cleaning the glass original sheet by using an acid solution to enable attachments on the surface of the glass original sheet to fall off, and cleaning and drying by using pure water to obtain the filter glass.

4. The method for preparing filter glass according to claim 3, wherein the time for which the glass original sheet is left standing in the step (2) is 1-5min, and the temperature of the etching solution is 12-15 ℃.

5. The method for producing a filter glass according to claim 3, wherein the pretreatment is carried out by cleaning the surface of the glass original with an acid solution and pure water in this order.

6. The method for producing filter glass according to claim 5, wherein the acid solution is a mixture of hydrofluoric acid and sulfuric acid.

7. A filter glass produced by the method for producing a filter glass according to any one of claims 2 to 6.

8. The filter glass of claim 7, wherein the filter glass has a gloss of 45-50%, a light transmittance of 52-58%, a haze of 50-55%, a roughness of 2.0-2.5 μm, and a reflectance of 3.5-4.0%.

9. An optical filter, characterized in that a raw material for manufacturing the optical filter comprises the filter glass according to claim 7 or 8.

10. A medical device, characterized in that the component of the medical device comprises a filter glass according to any one of claims 7-8 or a filter according to claim 9.