Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing diagonally stretched film

A manufacturing method and a stretching film technology, which are applied in the manufacturing field of oblique stretched films and can solve the problems of poor productivity and the like

Active Publication Date: 2020-01-21
KONICA MINOLTA INC
View PDF24 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to incline the light transmission axis of the polarizer and the slow axis of the stretched film at a desired angle as described above, it is necessary to cut out the long polarizing film and / or the stretched film at a specific angle and Batch type in which sheets are bonded one by one, resulting in poor productivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing diagonally stretched film
  • Method for producing diagonally stretched film
  • Method for producing diagonally stretched film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] One embodiment of the present invention will be as follows if described based on the drawings. In addition, in this specification, when a numerical range is shown as A-B, the value of the lower limit A and the upper limit B is included in this numerical range.

[0046] The method for producing a long diagonally stretched film according to this embodiment is to stretch a long raw film containing a thermoplastic resin in a diagonal direction with respect to the width direction and the long side direction to produce a long diagonal stretch film. A method for producing a stretched film and a long obliquely stretched film.

[0047] The orientation direction of the elongated obliquely stretched film, that is, the direction of the slow axis is a direction that forms an angle greater than 0° and less than 90° with respect to the broadside direction of the film in the film plane (in the plane perpendicular to the thickness direction) (It automatically becomes a direction which ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
acid valueaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

A method for manufacturing a diagonally stretched film, comprising the following steps of diagonally stretching: using a pair of grippers to grip both ends of the film in the widthwise direction, so that the grippers on one side move forward relative to each other, and the grippers on the other side The film is conveyed with a relative delay, and the conveyance path of the film is curved in an arc shape, thereby stretching the film obliquely with respect to the widthwise direction. In the oblique stretching step, the temperature of the film at the end of the arc-shaped bending of the transport path used for oblique stretching is lower than that at the beginning of the bending.

Description

technical field [0001] The present invention relates to a method for producing a diagonally stretched film in which a film is stretched obliquely with respect to a widthwise direction. Background technique [0002] Conventionally, a self-luminous display device such as an organic EL (Electro-Luminescence) display device called an OLED (Organic light-Emitting Diode) has attracted attention. In OLEDs, a reflector such as an aluminum plate is provided on the rear side of the display in order to improve light extraction efficiency. Therefore, external light incident on the display is reflected by the reflector, thereby reducing image contrast. [0003] Therefore, in order to improve the light-dark contrast by preventing reflection of external light, it is known to bond a stretched film and a polarizer to form a circular polarizing plate, and arrange the circular polarizing plate on the front side of a display. At this time, the above-mentioned circularly polarizing plate is for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29C55/04
CPCB29C55/04B29C55/20
Inventor 畠山晋平
Owner KONICA MINOLTA INC