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Glass blank for shape and producing method thereof, glass product producing method therewith

A glass blank, pre-forming technology, applied in glass forming, glass pressing, glass manufacturing equipment, etc., can solve problems such as a lot of time and cost, uneven surface layer of glass blank, etc., to prevent fusion or cloud spots. Effect

Inactive Publication Date: 2004-04-21
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the film formation of the release film requires special conditions, so there is a problem that it takes a lot of time and cost
However, when the silane coupling agent is applied by these methods, the surface layer of the glass material for molding is likely to become uneven, and it is not always possible to prevent micro-fusing, which is not a very satisfactory method.

Method used

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  • Glass blank for shape and producing method thereof, glass product producing method therewith
  • Glass blank for shape and producing method thereof, glass product producing method therewith
  • Glass blank for shape and producing method thereof, glass product producing method therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] A glass blank in which a self-assembled film is formed on the surface of a preformed core glass is prepared. That is, n-octadecyltrichlorosilane (CH 3 (CH 2 ) 17 SiCl 3 ) was diluted to 1 wt % in a coating solution prepared, and the glass blank was immersed at 20° C. for 60 seconds, then taken out from the coating solution, washed, and dried at room temperature for about 30 minutes. The optical glass used as core glass (glass blank) has a glass transition temperature of 520°C, a refractive index of 1.69350, and a linear expansion coefficient of 69×10 -7 / °C, borate-based glass containing alkali metal oxides as volatile components.

[0172] Since IR-RAS can only be used for partial analysis, the JASCO FT / IR620 device is used to analyze any 10 points on the surface of the glass blank with IR-RAS, and the results are as follows: Figure 5 As shown, peaks derived from the self-assembled film were observed at all 10 measurement points, confirming that the film formed on...

Embodiment 2～9

[0186] Except changing glass, coating solution, film-forming conditions, etc. as shown in Tables 3 to 5, others are the same as in Example 1, making a glass blank forming a self-assembled film, continuously pressing with the same mold, and observing that the number of times of pressing reaches 500. The appearance of the second-time optical element, the results are shown in Tables 3-5, there are almost no cloud spots, white turbidity and cracks, and the appearance quality is good or excellent.

Embodiment 10

[0188] Using the glass in Table 5, a preformed glass blank was immersed for 30 seconds in a coating solution prepared by diluting trichlorovinylsilane, the starting material of the self-assembled film, to 20 wt% with anhydrous benzene to form a film. , 10 points on the surface of the glass blank were analyzed by IR-RAS, and as a result, peaks were confirmed at 8 points.

[0189] The average film thickness evaluated by ESCA was 0.3 nm, 0.2 nm in the central part of the glass blank, and 0.3 to 0.4 nm in the peripheral part. from pure water and CH 2 I 2 The surface energy analyzed by the wetting angle measurement is 38~52mJ / m 2 .

[0190] As in Example 1, the same mold was used for continuous pressing, and the appearance of the optical element pressed 500 times was observed. The results are shown in Table 5. There are almost no cloud spots, white turbidity and cracks, and the appearance quality is very good.

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Abstract

A method of manufacturing a glass material for molding includes immersing a preformed glass material in an organic solution which contains an organic silicon-containing compound, an organic sulfur-containing compound, an organic fluorine-containing compound, or an organic nitrogen-containing compound to obtain the glass material which has a self-assembled film on a surface.

Description

technical field [0001] The present invention relates to a glass material for molding having a self-assembled film or a film formed by heating on its surface, a method for producing the same, and a method for producing glass products using the material. technical background [0002] As a method for forming precision optical glass elements easily and efficiently, there is the press molding method. The molding method is to melt and solidify the glass in advance or cold work, put the shaped glass blank into the mold for molding, soften it by heating and extrude it in a formable state, and hold the shaped glass element in the mold. The state makes it cool, and the method of obtaining glass components. In this method, since a precision-machined metal mold is used, the glass element does not require grinding after forming. [0003] When forming a glass element by press molding, the glass material for forming and the metal mold are adhered at a temperature higher than the softenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B40/02C03C1/02
CPCC03B2215/17C03B2215/66C03B40/02C03B2215/16C03B2215/24C03C1/028
Inventor 猪狩隆近江成明
Owner HOYA CORP
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