JPS59187819A - Preparation of polarizing lens of synthetic resin - Google Patents

Abstract

PURPOSE:To obtain easily the titled lens excellent in adhesion and durability, and free from bad effects due to the adhesive agent by uniting and molding a polarizing film and a synthetic resin lens by a special method. CONSTITUTION:First of all, a top and bottom glass forces 4, 5 are inserted tightly into, respectively, the upper and the lower part of a cylindrical gasket 1 that is round and flat inside and they are fixed to the step parts 2, 3 for mounting the top and bottom glass forces equipped on the upper and lower parts of the cylinder of the gascket 1 and the clearance between the glass molds 4, 5 is equalized to the thickness of the lens. The polarizing film 9 is mounted on a polarizing film retaining projection 6 in the inner space of the gascket 1 with a clarance to the inside of the gascket 1 and then synthetic resin material solution is injected from material solution injecting port 7 fully into the space and after the material is hardened the glass molds 4, 5 and the gascket 1 are removed to obtain the desired lens 10.

Description

[Detailed Description of the Invention] Polarized eyeglass lenses that are currently on the market are made by separately making two glass lenses, sandwiching a polarizing film and pasting them together with adhesive, which has the advantage of being easy to make. However, the disadvantage is that the area around the adhesive part peels off over time. Optically, it also depends on the adhesive, causing refractive abnormalities and color unevenness. Also, since the lenses are glued together, they must be handled with care; they may peel off, and their useful life is short, around one year.

The present invention aims to provide a polarized lens free from such drawbacks.

In the present invention, the lower part of a flat gasket (1) with a spherical inner surface is provided with a stepped part (2) (81) for placing an upper glass mold and a lower glass mold on the inner periphery of the upper and lower parts of a cylinder. Fit it tightly into the mold (5) and fix it to the stepped part (3),
The upper glass mold (4) is tightly fitted onto the upper part of the gasket (1) and fixed to the stepped part (2), and the gasket (1) is adjusted so that the distance between the upper glass mold (4) and the lower glass mold (5) is the same as that of the lens. Form the gasket to correspond to the thickness (1)
Place the polarizing film (9) on the protrusions (6) for placing the polarizing film provided at several locations on the inner surface of the space so that there are gaps between the polarizing film (9) and the inner surface of the gasket (1). Raw material solution injection provided at the top 1-. 3. Inject the raw material 18 liquid into the space from (7) and fill the upper glass mold (4) and the lower glass mold (5 ) and Gaskusoto (1) to produce a polarized lens.In addition, the polarizing film is exactly in the middle as shown in the fifth factor, or t. As shown in FIG. 8, it may be provided biased to one side. (10) is polarization 1/ns.

The raw material for the synthetic resin lens of the present invention is 0R-39 (n
”: J product 8) Saturated bolyene 7 de/l/resin such as thiedene glycol bisallyl carbonate 1 to 1 to 100 liters are used as main raw materials, isopropyl bar, fgish dicarbonate I.
A peroxide such as PP (referred to as PP 19,1) is used as a catalyst, and a polyurethane resin such as thermoplastic polyurethane is used as an auxiliary raw material.

An example of the blending and treatment of this raw material is as follows.

First, 0R-39 and I kg were mixed and stirred with 35y of the workpiece P. Next (tl When OR-39 changes from a liquid to a solid, prepolymerization is carried out in order to prevent air bubbles from entering due to shrinkage due to the condensation reaction and to hasten the induction reaction period to become a solid.This prepolymerization As a method, for example, the above mixture is subjected to a heating polymerization reaction at 80°C,
When the viscosity increases [7], cool rapidly.

Filter the raw material cooled at 20°C-t using a pressure filter 1.1
Impurities of micron size or larger exist and 22I: filtered in a similar way]
The filtered raw material is injected into the space (8) from the injection port (7) of the gas tank 1- to fill it.

After the injection is completed, the thermosetting resin is placed in a heating polymerization tank with the necessary humidity conditions until it hardens from the IiJ soluble state to the insoluble and infusible state, for example, starting at 40°C and finally at 80°C.
Heat gradually until reaching 85°C to 95°C.
After stepwise reheating polymerization in between, the gasket (1
) is removed, and heat treated again at about 110° C. in an inert gas, for example, nitrogen gas polymerization tank, to form a finished product.

Polarizing film is attached using the adhesive strength of the raw materials for synthetic resin lenses. However, in order to further increase the adhesive strength, a urethane-based brimer is sometimes applied to the polarizing film in advance to make the adhesive with the synthetic resin lens stronger than ever before. A thermoplastic polyurethane solution is used as the urethane thread bummer, and if a tighter TII force is required, about 1% to 10% of a curing agent is added to the mixture. In this case, any curing agent may be used as long as it crosslinks the thermoplastic polyurethane. Examples include melamine, phenol, ebogishi, 1/zorcinol, isocyanate, and the like.

(Polarized light for cars) is pasted on the synthetic resin polarized lens of the present invention9
Since the lenses are not aligned, the lifespan of the lenses is long and the production time is 1 ton.]
It has excellent effects such as being simple.

[Brief explanation of drawings]

The drawings show embodiments of the present invention. Figure 1 is a cross-sectional view of the manufacturing equipment, Figure 2 is a plan view of the same, and Figure 3 is a diagram of a polarized lens with a polarizing film provided exactly in the middle of a synthetic resin lens. 4 is a cross-sectional view of a polarizing lens in which a polarizing film is provided on the outer surface. 1. Gasket 2. Upper part 3 of gasket 1-, lower part of gasket 4. Upper glass mold 6, protrusion 7 for placing polarizing film, raw material solution injection port 8. gasket space 9,
Polarizing film 10. polarized lenses. Patent applicant Hiko Sugi Co., Ltd. Agent Patent attorney Hashimoto Partial procedural amendment 7゜1. Display of the case 1982 Patent Application No. 62586 2
, Title of the invention Process for manufacturing synthetic resin polarized lenses 3, Relationship to the case of the person making the correction Patent applicant address 4-102 Toiya-cho, Fukui City, Fukui Prefecture Name
Sugihiko Co., Ltd. 4, Agent 5, Date of amendment order 6, Subject of amendment 1, Detailed explanation of the invention column 2, Brief explanation of drawings column Contents of amendment 1, Specification page 8 Add "5 Lower glass mold," to line 12, "Saturated polyester resin."

Claims (1)

[Claims] The lower part of a flat cylindrical gasket with a spherical inner surface, which has stepped sections for placing the upper glass mold and lower glass mold on the inner periphery of the upper and lower parts of the cylinder body, is tightly fitted into the lower glass mold to fit into the stepped sections. Then, tightly fit the upper glass mold to the top of the gasket and fix it to the stepped part so that the gap between the upper glass mold and the lower glass mold corresponds to the thickness of the lens. 1. A method for manufacturing a synthetic resin polarized lens, which comprises: injecting and filling the raw material solution, and then removing an upper glass mold, a lower glass mold, and a gasket to manufacture a polarized lens.