JPS59214807A - Cutting method of polarizing plate - Google Patents

Abstract

PURPOSE:To use a small cutter and to perform efficient cutting without waste by forming a rectangular plate in consideration of the maximum cutting width of the cutter previously, and then cutting the plate into small polarizing plate strips. CONSTITUTION:The long-sized beltlike polarizing blank plate 1 which has an absorption axis lengthwise is cut on the bias at a specific angle to the absorption axis and at specific intervals in consideration of the maximum cutting width. Bias-cut plates 2 are joined together while cut edges form an upper and a lower parallel edge. The joined plate 3 is cut at right angles to the upper and lower parallel edges and at width intervals of size (l) equal to the maximum cutting width of the cutter to form rectangular plates 4 of DLMN and NMPQ. This rectangular plate 4 is cut in parallel to manufacture a small polarizing plate strip 5 having the absorption axis slantingly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting a polarizing plate that can be cut even if the blade length of a cutting machine is short. be.

1st step As shown in Figure 1, a polarizing original plate (1) in the form of a long strip with its absorption axis in the longitudinal direction is cut at a predetermined angle with respect to the absorption axis and biased at arbitrary intervals considering the length of the absorption axis. Cut into.

The drawing shows the case where AB, DC, and FE wires are cut with a width of □.

The method for manufacturing the original polarizing plate (1) will be omitted.

When making a polarizing plate, the length direction when the film is continuously stretched in one direction is called the absorption axis direction.

Second step: As shown in FIG. 2, this bias-cut #jl plate (2) is placed and spliced so that the cut edges become upper and lower parallel edges.

This joint board (3J) can be transferred to the third process as is, or it can be treated with adhesive, or it can be pasted with reflective material such as aluminum foil and processed with adhesive. Move.

As the adhesive, acrylic adhesive, silicone thread, or other adhesive is used.

Third step: The connecting plate (3) joined in the second step is cut by a cutting machine.

Fourth step: A strip-shaped polarizing plate (5) whose absorption axis is diagonally parallel to the rectangular plate (4) is prepared.

Conventional polarizing plates are cut parallel to and perpendicular to the upper and lower parallel edges while leaving the parallelogram ABCD shown in Figure 3 to form short IiH-shaped polarizing plates with absorption fine or oblique directions. If the cutting operation is carried out in the parallelogram state, the length of the cutting machine's blade will need to be as long as L, as shown in FIG. 3, and a correspondingly larger cutting machine will be required.

The present invention is intended to solve such drawbacks, and as mentioned above, the cutting machine is designed to cut the cutting machine as shown in FIG.
After forming the 1-dimensional rectangular plate (4) D L M N, the cutting operation of the small piece of short-sided polarizing plate (5) is necessary when cutting a conventional parallelogram-shaped polarizing plate from the row. L
A cutting machine with a blade length of 1 minute is now fine with a blade length of 1 minute.
Since it can be cut with a small cutting machine with a short blade length, the polarizing plate can be cut efficiently without waste.

In other words, it is a cutting method that has excellent features such as being able to cut out small pieces of polarizing plate efficiently even with a cutting machine with a small blade.

[Brief explanation of the drawing]

Figure 1 is a front view of the original polarizing plate, Figure 2 is a front view with the bias cutting plate placed in place, and the third cause is a front view of the connecting plate.
I411 is a front view of a square plate. (1)...Polarizing original plate, (2)...Bias cutting plate, (3
)...Connecting board, (4)...Square board. May 20, 1985 Applicant: Arisawa Seisakusho Co., Ltd. Inventor: Sakae Ogino Same as Yuroku Furukawa//Iki04Hagi2/Kokoro? )t

Claims (1)

[Scope of Claims] 1. A polarizing original plate in the form of a long strip whose absorption axis is in the longitudinal direction is cut into bias shapes at arbitrary intervals so that the absorption axis is at a predetermined angle with respect to the absorption axis, and the cut edges of the bias cut plate are The connecting plates are joined together with parallel edges, and cut at right angles to the upper and lower parallel edges at a specified width. A blade is inserted parallel to the sides to make the absorption axis oblique. A method for cutting a polarizing plate, the method comprising forming a short n+1 polarizing plate having a uniform direction. 2. A polarizing original plate in the form of a long strip with its absorption axis in the longitudinal direction is cut into two pieces at arbitrary intervals so that the absorption axis is at a predetermined angle with respect to the absorption axis. Temporary attachment with adhesive, in which one side of the joint board is treated with adhesive or a reflector is pasted on one side of the joint board, is a patent that includes a joint board with a reflector. A method for cutting a polarizing plate according to claim 1.