Production method of a broad PVA polarized light film

A technology of polarizing film and production method, which is applied to polarizing elements, optics, optical elements, etc., to achieve the effects of easy industrial production, precise heating temperature, and low scrap rate

Inactive Publication Date: 2010-03-17
SERVICE CENT OF COMMLIZATION OF RES FINDINGS HAIAN COUNTY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology and equipment are generally suitable for the production of narrow-width PVA polarizing film, while the production equipment and technology of wide-width PVA polarizing film are still blank

Method used

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  • Production method of a broad PVA polarized light film
  • Production method of a broad PVA polarized light film

Examples

Experimental program
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Embodiment Construction

[0012] like figure 1 Shown, the production equipment of PVA polarizing film comprises unwinding device 1, primary solution tank 3, primary heating roll, secondary heating roll, secondary solution tank 11, heat setting roll, traction device 16 and Curling device 17 .

[0013] The unwinding device 1 is arranged on one side of the primary solution tank 3 . At normal temperature, the primary solution tank 3 is filled with KI and I 2 Saturated solution, KI and I 2 The weight ratio is 2~8:1. The primary solution tank 3 is in communication with the primary liquid replenishment tank 2, and the primary liquid replenishment tank 2 is used to adjust and replenish KI and I in the primary solution tank 3 2 saturated solution. The secondary solution tank 11 is filled with a saturated solution of boric acid at a temperature of 55-65°C. The secondary solution tank 11 is connected to the secondary liquid replenishment tank 10, and the secondary liquid replenishment tank 10 is used to adju...

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Abstract

The invention relates to a production method of a broad PVA polarized light film. The broad PVA polarized light film can not be produced in the prior art. The broad PVA polarized light film productionmethod comprises the following steps: firstly soaking a PVA film into saturated solution of KI and KI2 with the weight ratio of 2-8:1 at the normal temperature; then heating two sides of the PVA filmtwice; putting the PVA film into a boric acid saturated solution with the temperature of 55-65 DEG C, and stretching the PVA film by 1-9 times in the boric acid saturated solution; respectively and thermally setting both sides of the PVA film through two heat setting rollers at the heat setting temperature of 65-75 DEG C; and drawing the thermal set PVA film and winding into a drum. The method has the advantages of simple process, accurate heating temperature, easy control of film thickness and low rejection rate, and realizes the industrialization production of the broad PVA polarized lightfilms.

Description

technical field [0001] The invention belongs to the field of film technology, and in particular relates to a production method of a wide-width PVA polarizing film. Background technique [0002] At present, there are few longitudinal stretching production devices and processes for producing PVA polarizing film on the market. The existing technology and equipment are generally suitable for the production of narrow-width PVA polarizing film, but the production equipment and technology of wide-width PVA polarizing film are still blank. With the popularization and application of large liquid crystal display screens (over 50 inches), the demand for wide-width PVA polarizing film is becoming more and more urgent in the market. Contents of the invention [0003] The purpose of the present invention is to provide a production method of wide-width PVA polarizing film, which is produced by longitudinal stretching equipment with dipping tank device and oil medium heating roller. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/04B29C55/02
Inventor 梁多平项秀阳董淑英周盛华胡更生赵松章徐德英
Owner SERVICE CENT OF COMMLIZATION OF RES FINDINGS HAIAN COUNTY
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