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

Process for continuously producing acrylic resin sheet

一种丙烯酸系树脂、甲基丙烯酸甲酯的技术，应用在涂层等方向，能够解决供给设备过大、制品板变黄、易掺入泡等问题，达到聚合设备缩小、薄板厚斑少、实现生产量的效果

Inactive Publication Date: 2013-03-27
MITSUBISHI RAYON CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, it is necessary to uniformly disperse the thermal initiator in the slurry with a very high viscosity, which requires a large number of units of the static mixer, and the pressure loss per unit also increases, so the supply equipment such as pumps and lines becomes smaller. too big
Furthermore, in the continuous plate-to-plate casting method using a pair of metal endless belts, there is a problem that the angle of the belts cannot be changed rapidly due to the high rigidity of the belts, and it is impossible to obtain a large amount of time when the raw material slurry is sandwiched. 1 pair of belt angles, if the high viscosity high polymerization rate slurry is used as raw material, it is easy to mix bubbles
However, even if these methods are simply adapted to raw materials containing a large amount of methyl methacrylate, and polymerized and solidified, there is the following problem: the heat resistance cannot be improved, and the heat resistance cannot be improved by the continuous plate-to-plate casting method. Advantages, or yellowing of product boards requiring high optical properties
However, since it is difficult to obtain adhesion to the base material, there is a problem that the production speed is restricted
In addition, there is a problem that the obtained resin laminate tends to warp due to the residual effect of the ultraviolet curable adhesive layer by ultraviolet irradiation.

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
  • Process for continuously producing acrylic resin sheet
  • Process for continuously producing acrylic resin sheet
  • Process for continuously producing acrylic resin sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] With respect to 60 parts of methyl methacrylate monomers, 0.3 parts of 1-hydroxy-cyclohexyl-phenyl ketone (Ciba Specialty Chemicals Co., Ltd., IRGACURE 184) as an ultraviolet decomposition polymerization initiator, and dihydrogen as a release agent were added. Sodium octyl sulfosuccinate (Mitsui-Cyanamid, Limited, aerosol OT-100) 0.05 part was dissolved at room temperature, and methyl methacrylate was polymerized by heating at 80°C for 30 minutes. UV polymerizable viscous liquid (polymer content ratio 39.9%) was prepared by using 40 parts of microbeads (manufactured by Mitsubishi Rayon Co., Ltd., BR-83, weight average molecular weight: 40,000). In order to remove bubbles during preparation, after standing at 50° C. for 2 hours, it was naturally cooled to normal temperature.

[0217] use with figure 1 In the same apparatus as shown, a stainless steel endless belt with a width of 500 mm was used as the endless belt 3, and a polyethylene terephthalate film (Cosmoshine A41...

Embodiment 2

[0221]With respect to 65 parts of methyl methacrylate monomers, 35 parts of methyl methacrylate polymer beads (manufactured by Mitsubishi Rayon Co., Ltd., BR-80, with a weight average molecular weight of 100,000) were set at 35 parts (polymer content ratio 34.9%) ), except that, a resin sheet was obtained in the same manner as in Example 1. In this case, the viscosity of the polymeric viscous liquid may be more than 10000 mPa·s in the more preferable range, the flow is suppressed at the edge part, and there is almost no part where the plate becomes thinner. The temperature peak in the ultraviolet irradiation section at this time was 4.8 minutes after irradiation.

Embodiment 3

[0223] As an ultraviolet irradiation device, EYE GRAPHICS Co., Ltd. (EYE GRAPHICS CO., LTD.) EGT-061-C1 was used, and 120 W / cm, 0.5 minutes, and 2 J / cm 2 The intensity of irradiation (67mW / cm 2 ), and irradiate with ultraviolet light for 6 minutes. Other conditions were the same as in Example 2, and a resin sheet was obtained. The temperature peak in the ultraviolet irradiation section at this time was shortened to 4.0 minutes from the irradiation, but the irradiation intensity of ultraviolet rays was strong, and a slight yellow smell was confirmed when viewed from the edge of the resin sheet. When observed from the surface of the resin sheet, there was no problematic change in the yellowish smell, and it was a good product.

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
linear shrinkageaaaaaaaaaa
Login to View More

Abstract

Disclosed is a method for continuously producing an acrylic resin sheet containing 50% by mass or more of methyl methacrylate units, which comprises irradiating an active energy ray-polymerizable viscous liquid 2 which contains a polymer, satisfies the following equations (1) and (2), and has a viscosity of 5,000 Pa·s or more with the active energy ray to cure the liquid while transferring the liquid in the state of being held between an endless belt 3 and a film 5 transmissive to the active energy ray or between first and second films transmissive to the active energy ray, 30 , 000 ‰¤ Mw ‰¤ 500 , 000 35 - 9 / 200 , 000 × Mw ‰¤ P ‰¤ 60 wherein, in these equations, Mw represents a weight average molecular weight [-] of the polymer contained in the liquid, and P represents a content [% by mass] of the polymer contained in the liquid.

Description

technical field [0001] The present invention relates to a method for continuously manufacturing an acrylic resin sheet. Background technique [0002] In recent years, in small displays such as mobile phones, portable game consoles, car navigation systems, portable AV equipment, etc., the fineness of images has shown great progress. Furthermore, higher transparency and less optical strain than conventional ones are also required for transparent resin sheets that protect the surfaces of these displays. [0003] Especially for mobile phones, against the background of the global trend of thinning the casing, the era of requiring the accuracy of the casing parts at the micron level has come, and the protective plate of the display part is no exception. The permissible value of variation in dimensional accuracy and warpage due to various heat histories from cutting, printing, and finishing of the transparent resin sheet that is the raw material of the protective sheet becomes str...

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): C08F2/00B29C41/28C08F265/02C08J5/18
CPCC08F2/46B29C35/10B29C2035/0827B29K2033/12C08F265/00C08F265/02C08F265/04B29C2035/0833B29C2035/0877B29C39/16B29C2035/0844B29K2033/08B29C41/28C08F2/48C08F20/14C08J5/18
Inventor 平野贵之奥津肇西田直毅舟见英太冈藤宏山泽英人高山大辅石原丰
Owner MITSUBISHI RAYON CO LTD