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Double-sided laminated polyester film

A laminated polyester film, double-sided technology, applied in the direction of coating, layered products, synthetic resin layered products, etc., can solve problems such as the reduction of film surface slipperiness, and achieve high-value effects

Active Publication Date: 2012-06-13
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when a hard coat layer is applied on both sides of the film, although the oligomer precipitation prevention performance is good, when the product is wound into a roll, defects such as a decrease in the slipperiness of the film surface may occur.

Method used

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Examples

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manufacture example

[0056] As a specific production example of the polyurethane resin, for example, a method utilizing a reaction between a hydroxyl group and an isocyanate can be mentioned. As the hydroxyl group used as a raw material, polyols are preferably used, and examples thereof include polyether polyols, polyester polyols, polycarbonate polyols, polyolefin polyols, and acrylic polyols. These compounds may be used alone or in combination.

[0057] Examples of polyether polyols include polyethylene glycol, polypropylene glycol, polyethylene glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol, and the like.

[0058] Examples of polyester polyols include polycarboxylic acids (malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, fumaric acid, maleic acid, p- phthalic acid, isophthalic acid, etc.) or their anhydrides and polyols (ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripro...

Embodiment 1

[0139] Mix polyesters (I) and (II) at a ratio of 90% and 10% respectively, use the mixed raw materials obtained by mixing as raw materials for the outermost layer (surface layer), and use polyester (I) as a raw material for the middle layer, and supply to 2 sets of extruders, each melted at 285°C, co-extruded with 2 types of 2-layer (surface layer / middle layer / surface layer) layer structure on the cooling roll set at 40°C, allowed to cool and solidify, and obtained Unstretched sheet. Next, after stretching 3.4 times in the longitudinal direction at a film temperature of 85°C by using the difference in roll rotation speed, each coating layer composed of the following coating agents is coated on both sides of the film so that the coating amount (after drying) is a predetermined amount. (With respect to the film moving direction, the upper surface is called A side, and the lower surface is called B side), then it is introduced into a tenter, stretched 4.3 times at 120°C in the tr...

Embodiment 2～ Embodiment 8

[0165] In Example 1, the composition of the coating agent coated on the A side and the B side was changed to the composition shown in the following Tables 1 and 2 (units in the table are weight %), and the same as in Example 1 1 was produced in the same manner to obtain a double-sided laminated polyester film. The properties of the obtained double-sided laminated polyester film are shown in Table 3 below.

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Abstract

Provided is a double-sided laminated polyester film which comprises a layer for preventing oligomer precipitation and a highly adhesive layer showing good adhesiveness with a hard coat layer, and which is ideal as a touch panel structural member, for instance. One film surface of the double-sided laminated polyester film has a first coating layer which contains an ammonium salt group-containing polymer, a polyethylene glycol-containing acrylate polymer, and a crosslinking agent, and the other film surface has a second coating layer which contains a crosslinking agent and a polyurethane resin.

Description

technical field [0001] The present invention relates to a double-sided laminated polyester film, and more specifically, to a double-sided laminated polyester film comprising a coating layer excellent in easy adhesion to a hard coat layer and a coating layer having an oligomer precipitation preventing function membrane. Background technique [0002] Conventionally, in touch panel applications, various methods such as a resistive film method and an electrostatic capacity method have been used as position detection methods. Among these, since the structure is simple and the cost performance is excellent, the resistance film method tends to increase in popularity. Generally speaking, the structure of a touch panel using a resistive film method is that a transparent conductive laminate and a glass with a transparent conductive film are arranged opposite to each other through a spacer, and a current is passed through the transparent conductive laminate. The voltage structure of ...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/00B32B27/30B32B27/40C08J7/043C08J7/046
CPCB32B2255/10C08J7/042B32B2255/26C08J2475/04C08J2333/06B32B7/12C08J2367/02B32B27/36Y10T428/31565Y10T428/31797Y10T428/31855C08J7/043C08J7/046C09D133/14C08K5/0025C08K3/10B32B2367/00
Inventor 井崎公裕藤田真人
Owner MITSUBISHI CHEM CORP
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