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Preparation method for even-orientation-degree organic glass

A technology of plexiglass and degree of orientation, applied in the field of preparation of oriented plexiglass, can solve the problems of affecting the appearance and optical quality of sheet-formed products, deterioration of optical properties, uneven mechanical properties of oriented plexiglass, etc.

Active Publication Date: 2012-02-22
锦西化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uneven orientation degree of the entire board surface will cause the uneven polymer arrangement state of the oriented plexiglass sheet, which will lead to uneven mechanical properties and poor optical properties of the oriented plexiglass sheet, which will eventually affect the appearance and optical quality of the sheet molded products

Method used

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  • Preparation method for even-orientation-degree organic glass
  • Preparation method for even-orientation-degree organic glass
  • Preparation method for even-orientation-degree organic glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Step 1: Put a 1600×1600×20mm plexiglass casting plate on the grinder with 120 # Grind with sandpaper for 30 minutes, then turn the plate over, grind the other side for 30 minutes, take it off, and measure the thickness of the plate with an ultrasonic thickness gauge, and measure no less than 81 points as evenly as possible.

[0018] Step 2: Fix the plate on the fixture of the stretching machine, and perform directional stretching at 125°C to 160°C. During the stretching process, ensure that the temperature uniformity in the insulation chamber is not greater than 3°C, and the entire plexiglass plate is stretched out. Long reach 70% stop.

[0019] Step 3: After the stretching is completed, cool down the sheet to room temperature and remove the sheet. Cut off 300mm of its edge. Attached figure 1 Take samples as shown and measure their degree of orientation.

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Abstract

Provided is a preparation method for even-orientation-degree organic glass. A grinded organic glass pouring plate is extended through an X-axis and a Y-axis in 125 DEG C to 160 DEG C. The organic glass pouring plate is methyl methacrylate homopolymerization or copolymerization plate prepared by a body pouring method and contains plasticizers, cross-linking agents or other performance addictives. The organic glass can be grinded flash through grinding equipment including grinders or lapping machines, and the height of grinded flash materials is smaller than 0.3mm. Stretching orientation can be performed through an X-Y double axis oriented stretching machine, and uniformity of the inner temperature of a thermal insulation cavity of the organic glass is smaller than 3 DEG C. The uniformity of orientation degree of prepared oriented stretched organic glass is no larger than 3%.

Description

technical field [0001] The invention relates to a method for preparing oriented plexiglass, in particular to a method for preparing oriented plexiglass with uniform orientation. Background technique [0002] The plastic sheet made of methyl methacrylate through bulk casting homopolymerization or copolymerization process is called plexiglass casting plate, commonly known as plexiglass. Plexiglass is widely used in aviation, ships, automobiles and construction fields because of its excellent optical properties, excellent formability and certain mechanical properties. [0003] Oriented plexiglass, also known as plexiglass directional stretch plate, is a polymethyl methacrylate (PMMA, commonly known as plexiglass) cast plate (generally with a thickness of more than 12mm and a length and width of more than 1200mm) at a suitable temperature. Made by X-Y biaxial stretching. The stretching process is to first fix the four sides of the plexiglass plate with clamps, then raise the t...

Claims

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Application Information

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IPC IPC(8): B29C55/12
Inventor 王宝军刘大光朱子华侯超军王大勇
Owner 锦西化工研究院有限公司
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