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Flame-retardant film

A flame-retardant film and flame-retardant layer technology, applied in the field of flame-retardant polyester film, can solve the problems of film softening by heat, flammability, and unsuitability for graphic applications

Pending Publication Date: 2022-05-06
AGFA GEVAERT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems in that polyester-containing films soften or melt when heated, and are flammable
However, a silicone binder will impart very hydrophobic and thus highly repellent properties to e.g. printing inks on the formed flame retardant body or layer, thus making the material unsuitable for graphic applications, e.g. printable synthetic paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0081] Example 2 shows the minimum amount of compounds constituting the flame retardant layer required to obtain sufficient flame retardancy of the film.

[0082] The coating composition of INV-1 was coated on polyester-containing film 2 at the different dry coat weights listed in Table 4 according to §C.2.1. The results of the flame test according to §C.2.2 are also listed in Table 4.

[0083] Table 4

[0084] compound COMP-2 INV-2 INV-3 INV-4 INV-5 COMP-3 Kieselsol 100F 4.5 10.7 12.7 15.3 24.0 - Exolit AP420 7.2 17.1 20.4 24.6 40.0 20.0 Laponite RDS 1.5 3.6 4.2 5.1 10.0 5.0 Trividasol 0.03 0.03 0.06 0.09 0.12 0.05 Micral 9400 4.0 9.5 11.3 13.6 24.0 12.0 flame retardant 2 1 1 1 1 2

[0085] The results in Table 4 show that colloidal silica is a necessary compound in the flame retardant layer in order to achieve sufficient flame retardancy, and that the amount of the compound in the fl...

Embodiment 3

[0087] Example 3 shows that an inorganic binder (eg, synthetic clay) is required to provide sufficient film-forming properties for the flame retardant layer.

[0088] From the coating composition of INV-1, the Laponite RDS was omitted, and the resulting coating composition was coated on polyester-containing film 2 according to §C.2.1. However, uniform film formation was not obtained.

[0089] From Example 3 it can be concluded that an inorganic binder is necessary to achieve a uniform flame retardant layer.

Embodiment 4

[0091] Example 4 shows that the addition of an organic binder to a flame-retardant layer according to the invention, for example to improve printability, does not reduce the flame retardancy of the flame-retardant layer according to the invention.

[0092] In order for a layer to be printable, ink absorption of the layer and adhesion of the electrophotographic toner should be achieved. This can be achieved by adding an acrylate binder and Versa TL77 to the flame retardant layer of the present invention. To test the effect of adding these organic binders on flame retardancy, the flame retardant layers from Table 5 were coated on polyester-containing film 2 (=INV-6) and tested for flame retardancy.

[0093] table 5

[0094] compound g / m² Kieselsol 100F 9.0 Exolit AP420 14.4 Laponite RDS 3.0 Trividasol 0.05 Micral 9400 8.0 Versa TL77 1.68 Neocryl XK151 6.3

[0095] A flame test according to §C.2.2 reveals a class of 1 (=...

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Abstract

A flame retardant film comprising a polyester-containing film, the polyester-containing film comprising a flame retardant layer on a side thereof. The flame retardant layer includes a colloidal metal oxide in an amount of 6 g / m or more, an inorganic binder in an amount of 2 g / m or more, the first flame retardant being a phosphorus-containing compound in an amount of 10 g / m or more, and the second flame retardant being a phosphorus-containing compound in an amount of 10 g / m or more. And the second flame retardant is an inorganic compound selected from the group consisting of aluminum hydroxide, aluminum trihydrate, magnesium hydroxide, calcium magnesium carbonate, magnesium carbonate hydrate, alumina hydroxide, a boron compound, antimony trioxide, and combinations thereof in an amount of 6 g / m or more.

Description

technical field [0001] This invention relates to flame retardant polyester films and, more particularly, to flame retardant synthetic papers. Background technique [0002] Polyester films are used as magnetic recording materials, electrical insulating materials, capacitor materials, packaging materials, and building materials due to their mechanical properties, electrical properties, and the like. In addition, polyester films are used as various industrial materials for photographic applications, graphic applications (eg, synthetic paper), thermal transfer applications, and the like. However, there are problems in that the polyester-containing film is softened or melted by heat, and is flammable. In particular, when polyester films are used as electrical insulation for applications related to adhesive tapes, flexible printed circuits, membrane switches, membrane heaters or flat cables, or as printable substrates in sign and display applications in construction , It is requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08J7/05C09D1/00C09D5/18C09D7/61C09D7/65C08L67/02
CPCC08J7/06C08J7/05C09D1/00C09D5/18C09D7/61C09D7/65C08J2367/02C08J5/18C08J2323/08
Inventor G·韦尔克吕斯H·范阿尔特D·昆腾斯S·理查森S·斯梅特
Owner AGFA GEVAERT AG
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