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Manufacturing method of extrusion resin sheet

A transmissive, resin board technology, applied in the manufacture of extruded resin boards, and the field of manufacturing extruded resin boards, can solve problems such as easy deformation, and achieve the effect of not easy reflection and deformation

Inactive Publication Date: 2008-06-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Moreover, the conventionally used transparent substrates (A1, A2) made of extruded resin sheets (A) have the following problem: if the Fresnel lens layer (11a) or hard coat layer (12a) is formed by irradiating ultraviolet rays or heating ,easily transformed

Method used

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  • Manufacturing method of extrusion resin sheet
  • Manufacturing method of extrusion resin sheet
  • Manufacturing method of extrusion resin sheet

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0125] In the preparation method of the above-mentioned extruded resin sheet (A) of the present invention, thermoplastic resins other than the transparent resin (P) can also be used, and an extruded resin sheet (A) that is not easily reflected when irradiated with ultraviolet rays or infrared rays from one side can be obtained. ).

[0126] 【Example】

Embodiment 1～ Embodiment 7

[0139] 2 mass parts of 95 mass parts of methyl methacrylate and 5 mass parts Copolymer particles of ethylene glycol dimethacrylate [average particle size 10 μm, refractive index 1.49], after fully mixing with a Henschel mixer, use an extruder [screw diameter 130 mm, single screw type] (2) The thermoplastic resin (P) is obtained by melting and kneading while heating, and the obtained resin is directly extruded from the T-die (1) in a molten state.

[0140] As shown in Figure 3, the thermoplastic resin (P) extruded from the T die (1) is clamped between the first cooling roll (R1) and the second cooling roll (R2), and adheres to the second cooling roll (R2) ) for winding, sandwiched between the second cooling roll (R2) and the third cooling roll (R3), adhered to the third cooling roll (R3) for winding, while sandwiching the third cooling roll (R3) Between the fourth cooling roll (R4), it is wound to the fourth cooling roll (R4) for cooling. The first cooling roll ( R1 ), the se...

Embodiment 8～ Embodiment 11

[0151] In addition to not using copolymer particles, a copolymer of 60 parts by mass of methyl methacrylate and 40 parts by mass of styrene (refractive index 1.53, heat distortion temperature 100°C) was used alone, the peripheral speed of each roller, resin temperature, atmosphere temperature and Except that the thickness of the extruded resin sheet was shown in Table 3, the same procedure as in Example 1 was carried out, and the results are shown in Table 3.

[0152] table 3

[0153]

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Abstract

The present invention provides a transmissive screen having as a member an extruded resin sheet (A) obtained by extrusion of a transparent resin (P) in a heat melt state from a die (D) in one direction, and provides a transmissive screen, wherein in the case where the extruded resin sheet (A) is subjected to a heating test of maintaining the resin sheet at 150 DEG C. for 1 hour, the shrinkage factor (S) in the extrusion direction evaluated from Equation (1): S=(L0-L1) / L0 x100 ( 1 ) wherein S represents the shrinkage factor (%) in the extrusion direction, L0 represents the length (mm) in the extrusion direction prior to the heating test, and L1 represents the length (mm) in the extrusion direction after the heating test, satisfies Equation (2): 2 / X<=S<= 18 / X ( 2 ) wherein S means the same as S in Equation (1), and X represents the sheet thickness (mm) of the extruded resin sheet (A).

Description

technical field [0001] The present invention relates to transmissive screens. In addition, the present invention relates to a method for producing an extruded resin sheet, and specifically relates to a method for producing an extruded resin sheet by extruding a thermoplastic resin from a die in a heated and molten state, winding it on a cooling roll, and cooling it. Background technique [0002] Such as figure 1 As shown, a rear projection display device ( 5) Also known as projection television and widely used. [0003] As a transmissive screen (3) used in a rear projection display device (5), it is generally installed on the back side where the light (L) from the projector (4) is incident and the front side where the light (L) is emitted. Two-piece screen of Fresnel lens (11) and lenticular lens (12) [US2005 / 0213208A1]. In addition, as the projector ( 4 ), recently, a liquid crystal projector that forms and projects an image with a liquid crystal cell (not shown) and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/56G03B21/60B29C47/00B29L7/00G03B21/602
Inventor 前川智博赤田胜己
Owner SUMITOMO CHEM CO LTD