# US 2013/0156994 A1 · Low water-vapor permeable composite film and packaging structure

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- Number: US 2013/0156994 A1
- Document ID: US20130156994A1
- Status: Published application
- Kind: A1
- Application number: 13/547,568
- Filed: 2012-07-12
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Industrial Technology Research Institute
- Inventors: Jui-Hung HSU; Ming-Cheng FENG; Jhih-Meng TANG; Dan-Cheng KONG
- Web page: https://patentgrep.com/patent/US20130156994A1

## CPC

- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/36: comprising polyesters
- B32B 2250/03: 3 layers
- B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C)
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2307/518: bi-axially
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- Y10T 428/239: Complete cover or casing
- Y10T 428/24975: No layer or component greater than 5 mils thick
- Y10T 428/24992: Density or compression of components
- Y10T 428/269: including synthetic resin or polymer layer or component
- Y10T 428/31515: As intermediate layer
- Y10T 428/31544: Addition polymer is perhalogenated
- Y10T 428/31551: Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T 428/31663: As siloxane, silicone or silane
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- Y10T 428/31855: Of addition polymer from unsaturated monomers
- Y10T 428/31909: Next to second addition polymer from unsaturated monomers
- Y10T 428/31913: Monoolefin polymer
- Y10T 428/3192: Next to vinyl or vinylidene chloride polymer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided is a low water-vapor permeable composite film, which includes a 3-layered co-extruded biaxial-oriented film formed of polyester films or polypropylene films including a first layer, a second layer and a third layer stacked in sequence. The first layer further includes an anti-block agent. An alternate structure including a plurality of organic protection layers and a plurality of inorganic layers are formed on the 3-layered co-extruded biaxial-oriented film. The plurality of organic protection layers and the plurality of inorganic layers are stacked alternately. The inorganic layers are formed by atom layer deposition

## Claims

### Claim 1

A low water-vapor permeable composite film, comprising:
a 3-layered co-extruded biaxial-oriented film formed of polyester films or polypropylene films comprising a first layer, a second layer and a third layer stacked in sequence; and
an alternate structure comprising a plurality of organic protection layers and a plurality of inorganic layers are formed on the 3-layered co-extruded biaxial-oriented film, wherein the plurality of organic protection layers and the plurality of inorganic layers are stacked alternately, and the inorganic layers are formed by atom layer deposition,
wherein when the 3-layered co-extruded biaxial-oriented film is formed of polyester films, the first layer comprises polyethylene terephthalate, glycol-modified polyethylene terephthalate, acid-modified polyethylene terephthalate, glycol-modified polycyclohexanedimethylene terephthalate or combinations thereof, the second layer comprises poly(ethylene terephthalate), poly(propylene terephthalate), polybutylene terephthalate, polyethylene naphthalate or combinations thereof, and the third layer comprises polyethylene terephthalate, glycol-modified polyethylene terephthalate, acid-modified polyethylene terephthalate, glycol-modified polycyclohexanedimethylene terephthalate or combinations thereof, and the first layer further comprises an anti:block agent,
wherein when the 3-layered co-extruded biaxial-oriented film is formed of polypropylene films, the first layer comprises polypropylene, ethylene-propylene copolymer, ethylene-propylene-butylene copolymer, high density polyethylene or combinations thereof, the second layer comprises polypropylene, ethylene-propylene copolymer or combinations thereof, and the third layer comprises polypropylene, ethylene-propylene copolymer, ethylene-propylene-butylene copolymer, high density polyethylene or combinations thereof, and the first layer further comprises an anti-block agent.

### Claim 2 (depends on 1)

The composite film of claim 1, wherein the lowest layer of the plurality of the inorganic layers is directly disposed on the third layer of the co-extruded biaxial-oriented film.

### Claim 3 (depends on 1)

The composite film of claim 1, wherein the uppermost layer of the alternate structure is one of the plurality of organic protection layers.

### Claim 4 (depends on 1)

The composite film of claim 1, wherein the plurality of the inorganic layers comprises aluminum oxide, zinc oxide, zirconium oxide, silica, indium nitride, or combinations thereof.

### Claim 5 (depends on 1)

The composite film of claim 1, wherein each layer of the plurality of the inorganic layers has a thickness of between 120 atomic layers and 200 atomic layers.

### Claim 6 (depends on 1)

The composite film of claim 1, wherein the plurality of organic protection layers is a polymer layer which is cross-linked by multi-functional monomers and oligomers.

### Claim 7 (depends on 6)

The composite film of claim 6, wherein the multi-functional monomers comprise acrylate, epoxy acrylate, ureathane acrylate, or combinations thereof.

### Claim 8 (depends on 6)

The composite film of claim 6, wherein the polymer layer is polymerized by the multi-functional monomers, the oligomers and an initiator reagent through heating or UV irradiation.

### Claim 9 (depends on 8)

The composite film of claim 8, wherein the initiator reagent comprises a radical initiator selected from the group consisting of benzophenone, 1-hydroxy-cyclohexylphenyl-ketone and diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide) or a cation initiator selected form the group consisting of diarylindonium salts, triaryl sulfonium salts, ferrocinium complexes and aryl diazonium.

### Claim 10 (depends on 6)

The composite film of claim 6, wherein the plurality of organic protection layers comprises polyvinylidine chloride, polyvinylalcohol, ethylene-vinylalcohol copolymer, transparent esters or combinations thereof.

### Claim 11 (depends on 1)

The composite film of claim 1, wherein the anti-block agent comprises silica, magnesium silicate, polysiloxane, polytetrafluoroethene or combinations thereof, wherein the anti-block agent has a concentration of between about 300 ppm and about 2000 ppm.

### Claim 12 (depends on 1)

The composite film of claim 1, wherein the second layer has a thickness of between about 13 μm and about 240 μm.

### Claim 13 (depends on 1)

The composite film of claim 1, wherein the third layer does not comprise an additive or dopants therein.

### Claim 14 (depends on 1)

The composite film of claim 1, wherein the low water-vapor permeable composite film is flexible.

### Claim 15 (depends on 1)

The composite film of claim 1, wherein the low water-vapor permeable composite film has a water vapor transmission rate of less than 0.02 g/m2 per day.

### Claim 16 (depends on 1)

The composite film of claim 1, wherein the low water-vapor permeable composite film has a full spectrum optical transmittance of greater than 80%.

### Claim 17 (depends on 1)

A packaging structure comprising:
an optoelectonic device; and
the low water-vapor permeable composite film of claim 1, which is adhered to the optoelectronic device.

### Claim 18 (depends on 17)

The packaging structure of claim 17, wherein the optoelectronic device is wrapped by the low water-vapor permeable composite film.

### Claim 19 (depends on 17)

The packaging structure of claim 17, wherein the optoelectronic device comprises an OLED, thin-film solar cell, dye-sensitized solar cell, e-paper or combinations thereof.

### Claim 20 (depends on 17)

The packaging structure of claim 17, wherein the low water-vapor permeable composite film has a water vapor transmission rate of less than 0.02 g/m2 per day and a full spectrum optical transmittance of greater than 80%.