Package of heat-bent polarizing sheet and injection-molded polarizing lens

Patent metadata

Field	Value
Publication number	US-11760875-B2
Application number	US-201816645709-A
Country	US
Kind code	B2
Filing date	Sep 7, 2018
Priority date	Sep 12, 2017
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

A package of a heat-bent polarizing sheet for producing an injection-molded polarizing lens and an injection-molded polarizing lens that uses said sheet is provided. The heat-bent polarizing sheet is cumulatively packaged by a non-adhesive isolation film so as to withstand moisture and then stored or transported and can be used in injection molding without performing preliminary drying as a pretreatment of injection molding and without substantial protective-film removal work.

First claim

The invention claimed is:

1. A package of heat-bent polarizing sheets, each heat-bent polarizing sheet having a convex surface side and a concave surface side, in which polarizing sheets heat-bent for injection molding are cumulatively packaged by means of a non-adhesive isolation film so as to withstand moisture, and then stored or transported,
wherein the package is a three side seal bag made from a continuous peelable film with a width sufficient to put a heat-bent polarizing sheet,
wherein the convex surface side of each heat-bent polarizing sheet from which a protective film has been separated and removed, is superimposed on the non-adhesive isolation film and then the non-adhesive isolation film with a predetermined width is moved so as to form layers, and is superimposed on the concave surface side of the heat-bent polarizing sheet,
wherein the heat-bent polarizing sheets are heat-bent polarizing sheets that can be used in injection molding without performing preliminary drying as a pretreatment of injection molding and without protective-film removal work.

2. The package of the heat-bent polarizing sheets according to claim 1 , wherein the packaged heat-bent polarizing sheet has a moisture content of 0.35 wt % or less and preferably 0.3 wt % or less.

3. The package of the heat-bent polarizing sheet according to claim 1 , wherein an amount of water vapor in gas inside the package is 15 g/m 3 or less and preferably 14 g/m 3 or less.

4. The package of the heat-bent polarizing sheet according to claim 1 , wherein transparent plastic sheets bonded to a polarizing film to form the heat-bent polarizing sheet have a thickness of 0.1 to 1 mm and are transparent plastic sheets containing at least one selected from the group consisting of an aromatic polycarbonate, polyacrylate, polyamide, acetylcellulose, and a composition containing an aromatic polycarbonate and an alicyclic polyester.

5. The package of the heat-bent polarizing sheet according to claim 1 , wherein the package is a primary package in which several dozen to several hundred heat-bent polarizing sheets which separated from protective films used during heat bending are cumulatively packaged by means of a non-adhesive isolation film, and a durable secondary package in which a plurality of the primary packages are packaged.

6. The package of the heat-bent polarizing sheet according to claim 5 , wherein the primary package or the durable secondary package has a sufficient buffer layer at least around the package and the buffer layer is formed of a non- or low-dust-generating material or covered with a non- or low-dust-generating material so that the buffer layer has a non- or low-dust-generating property.

7. The package of the heat-bent polarizing sheet according to claim 5 , wherein the primary package is a package in which heat-bent polarizing sheets are accommodated in a loadable container and the container is formed of a non- or low-dust-generating material or covered with a non- or low-dust-generating material so that the container has a non- or low-dust-generating property.

8. The package of the heat-bent polarizing sheet according to claim 5 , wherein a package material used in the secondary package is at least one selected from a single-wall corrugated fiberboard, a double-wall corrugated fiberboard, a triple-wall corrugated fiberboard, a plastic, a corrugated plastic, etc.

9. The package of the heat-bent polarizing sheet according to claim 5 , wherein the dampproof package material is used in packaging of the primary package or the durable secondary package.

10. The package of the heat-bent polarizing sheet according to claim 5 , wherein air inside packaging of the primary package and/or the durable secondary package is substituted with dry air or nitrogen, or the pressure thereof is reduced inside.

11. The package of the heat-bent polarizing sheet according to claim 1 , wherein the non-adhesive isolation film is selected from polyolefin film.

12. The package of the heat-bent polarizing sheet according to claim 1 , wherein a desiccant is enclosed and the desiccant is at least one selected from silica gel, quicklime, a calcium chloride processed product, silica alumina gel, clay, and a sheet-shaped desiccant.

13. The package of the heat-bent polarizing sheet according to claim 1 , wherein a sensor that detects packaging conditions is enclosed and the sensor detects water vapor partial pressure or oxygen.

14. The package of the heat-bent polarizing sheet according to claim 1 , wherein the package is sealable or easy-sealable after the package is unsealed.

15. The injection-molded polarizing lens, in which the heat-bent polarizing sheet stored in the package according to claim 1 is a heat-bent polarizing sheet that is subjected to injection molding without performing preliminary drying as a pretreatment of injection molding and without substantial protective-film removal work.

Assignees

• Wintec Inc
• Mitsubishi Gas Chemical Co
• Mgc Filsheet Co Ltd

Inventors

• Kimura Hideaki
• Akaki Masayuki
• Fujii Takashi

Classifications

• B65D81/24 Primary

  Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants (with thermal insulation B65D81/38) · CPC title

• G02B5/30 Primary

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• B65D77/04

  Articles or materials enclosed in two or more containers disposed one within another · CPC title

• B65D81/266

  for absorbing gases, e.g. oxygen absorbers or desiccants (B65D51/244, B65D51/30 take precedence) · CPC title