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Adhesive polyester film for optical use

A technology of polyester film and adhesiveness, which is applied in the direction of optics, optical components, polyester coatings, etc., and can solve the problems of manufacturing cost and weak absorption

Inactive Publication Date: 2004-07-14
TEIJIN DUPONT FILMS JAPAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-external light reflective film must be provided with a layer containing a near-infrared ray absorbing agent in order to prevent malfunction of surrounding equipment due to near-infrared rays. layer of UV absorber
thus having problems in terms of manufacturing cost

Method used

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  • Adhesive polyester film for optical use
  • Adhesive polyester film for optical use
  • Adhesive polyester film for optical use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～6

[0269] Polyethylene terephthalate (intrinsic viscosity: 0.62) containing 1% by weight of an ultraviolet absorber represented by the following formula (A) was melt-extruded onto a rotating cooling drum maintained at 20°C to form an unstretched membrane.

[0270]

[0271] Then, after stretching 3.4 times in the longitudinal direction, an aqueous coating liquid having a concentration of 8% of the following film coating composition (Table 1) was uniformly coated on both surfaces using a roll coater.

[0272] Table 1

[0273]

[0274] Polyester A-1: ​​an acid component consisting of 2,6-naphthalene dicarboxylic acid 65 mol % / isophthalic acid 30 mol % / isophthalic acid 5-sodium sulfonate 5 mol %; and ethylene glycol 90 mol % / diethylene glycol 10 mol% of diol component composition (Tg=80 degreeC).

[0275] Polyester A-2: an acid component consisting of terephthalic acid 80 mol% / isophthalic acid 15 mol% / isophthalic acid 5-sodium sulfonate 5 mol%; and eth...

Embodiment 5、6 and comparative example 8

[0292] In addition to using the ultraviolet absorber contained in the polyester and its content, the ultraviolet absorber of the following structural formula (B) was changed to a content of 1% by weight in Example 5, and the content was changed to 1 in Example 6. A laminated film was obtained in the same manner as in Example 1, except that the ultraviolet absorber of the following structural formula (C) was changed to polyester not containing an ultraviolet absorber in Comparative Example 8. Table 2 shows the properties of the obtained laminated film.

[0293]

[0294] Table 2

[0295]

[0296] As can be seen from the results shown in Table 2, the optical adhesive laminated film of the present invention is excellent in weather resistance, adhesiveness, transparency, and scratch resistance, and is useful as an optical adhesive base film. of.

Embodiment 7～11 and comparative example 9～18

[0298] Polyethylene terephthalate (intrinsic viscosity 0.62) containing 1% by weight of the ultraviolet absorber represented by the above formula (A) was melt-extruded on a rotating cooling drum maintained at 20°C to form an unstretched membrane.

[0299] After stretching 3.4 times in the longitudinal direction, an aqueous coating solution having a concentration of 8% of the following film coating composition (Table 3) was uniformly applied to both surfaces using a roll coater.

[0300] polyester

filler

Additive D

weight%

Additive E

weight%

lubricant

weight%

type

weight%

type

weight%

Example 7

A-5

75

C-1

10

3

2

10

Example 8

A-5

65

C-1

15

8

2

10

Comparative Example 9

A-5

55

C-1

20

5

5

15

Example 9

A-6

80

...

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PUM

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Abstract

An optical adhesive polyester film comprising (A) a polyester film layer containing an aromatic polyester and an ultraviolet absorber and (B) a coating formed on at least one surface of the polyester film (A). The coating (B) contains at least one polymer selected from the group consisting of a coating polyester having a glass transition point of 40 to 100 DEG C. and an acryl polymer having a glass transition point of 20 to 80 DEG C. in an amount of 50 to 95% by weight based on the coating. The optical adhesive polyester film is disposed on the front of a plasma display so as to block externally incoming ultraviolet light.

Description

technical field [0001] The present invention relates to an adhesive polyester film for optics. More specifically, it relates to an adhesive polyester film for optics that has an adhesive coating film formed on at least one surface of the polyester film and has excellent adhesiveness, transparency, and weather resistance. Background technique [0002] Polyester films, especially biaxially stretched films of polyethylene terephthalate or polyethylene naphthalate, are widely used due to their excellent mechanical properties, heat resistance, and chemical resistance. Used as raw materials for magnetic tapes, ferromagnetic film tapes, photographic negatives, packaging films, films for electronic parts, electrical insulation films, films for metal plate lamination, films attached to the surface of glass displays, etc., films for protecting various parts, etc. . In recent years, especially various optical films have been widely used, including base films of prism lenses, touch pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/10B32B27/36C08J7/043C08J7/046C08L33/00C09D167/00C09J7/22C09J7/38G02B5/20
CPCB32B17/10018C08J2467/00C08J2367/02C08J2433/00Y10T428/31504B32B27/36C09J7/0285G02B5/208C09J7/0246C09D167/00Y10T428/24355C09J2467/006Y10T428/25Y10T428/31786C09J2467/00C08J7/047C08L33/00C09J2433/00Y10T428/31794C09J7/38C09J7/22C09J7/255C08J7/0427C08J7/043C08J7/046C08L2666/02B32B7/12B32B2250/03B32B2367/00
Inventor 东条光峰久保耕司矢野真司市桥哲夫
Owner TEIJIN DUPONT FILMS JAPAN
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