 Vacuum fluidized powder feed apparatus |
| The invention is an improved powder feed apparatus of the type having a feed cup defining an ... |
|
| Method and device for the controlled break-up of liquid jets |
| The technical problem underlying the present invention is to make available a method for the ... |
|
| Optical fiber cooling tube |
| The invention provides an optical fiber cooling tube including an internal cavity adapted to have ... |
|
| Method and apparatus for applying metal cladding on surfaces and products formed thereby |
| OF THE INVENTION As noted in our application Ser. No. 481,412, applying metallic coatings on ... |
|
| Electronic coatings using filled borosilazanes |
| OF THE INVENTION The present invention is based on the discovery that desirable protective ... |
|
| Low density, high porosity material as gate dielectric for field emission device |
| What is claimed is: 1. A method of fabricating an electron emission apparatus comprising the steps ... |
|
| Foamed polymer for use as dielectric material |
| OF THE INVENTION The present invention relates to a foamed polymer having a pore size less than ... |
|
| Gel-coated microcapsules |
| OF THE INVENTION The coated microcapsules of the invention feature microcapsules coated with a gel,... |
|
| Porous silicon dioxide insulator |
| Parasitic capacitance is reduced in a semiconductor integrated circuit (IC) by forming a porous ... |
|
| Method for forming porous silicon dioxide insulators and related structures |
| Parasitic capacitance is reduced in a semiconductor integrated circuit (IC) by forming a porous ... |
|
|
Sealable polyester film with high oxygen barrier, its use and process for its production
| Details |
Inventors: Peiffer, Herbert; Bennett, Cynthia; Hilkert, Gottfried;
Assignee: Mitsubishi Polyester Film GmbH (Wiesbaden, DE)
Primary Examiner: Thibodeau; Paul
Assistant Examiner: Zacharia; Ramsey
Attorney, Agent or Firm: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
The application discloses a sealable biaxially oriented polyester film having a base layer B at least 80% by weight of which is composed of a thermoplastic polyester, and having two outer layers A and C, wherein the outer layer A is composed of a polymer or of a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 60% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, and the opposite outer layer C is sealable and has a sealing initialization temperature of from about 100 to 200.degree. C. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items. |
|
DETAILED DESCRIPTION What is claimed is: 1.
A sealable, biaxially oriented polyester film comprising: a base layer B, at least 80% by weight of which is composed of a thermoplastic polyester; an outer layer A, composed of a polymer or of a mixture of polymers comprising: at least 40% by weight of ethylene 2,6-naphthalate units; optionally up to 40% by weight of ethylene terephthalate units; and optionally up to 60% by weight of units from aliphatic diols, cycloaliphatic diols, aromatic diols, aliphatic dicarboxylic acids, cycloaliphatic dicarboxylic acids, aromatic dicarboxylic acids, or a combination thereof; and an opposite outer layer C having a sealing initialization temperature of .
ltoreq.
130.
degree.
C.
, wherein the compositions of layers A and C are not identical, and wherein layer C is amorphous.
2.
A film as claimed in claim 1, wherein the outer layer A comprises at least 65% by weight of ethylene 2,6-naphthalate units.
3.
A film as claimed in claim 1, wherein the outer layer A comprises at least 70% by weight of ethylene 2,6-naphthalate units.
4.
A film as claimed in claim 1, wherein the film has an oxygen permeability of less than 80 cm.
sup.
3 /(m.
sup.
2 bar d).
5.
A film as claimed in claim 1, wherein the film has an oxygen permeability of less than 75 cm.
sup.
3 /(m.
sup.
2 bar d).
6.
A film as claimed in claim 1, wherein the film has an oxygen permeability of less than 70 cm.
sup.
3 /(m.
sup.
2 bar d).
7.
A film as claimed in claim 1, wherein the outer layer C is amorphous and composed of copolyesters comprising two or more monomeric building blocks selected from the group consisting of naphthalene-2,6-dicarboxylic acid, terephthalic acid, isophthalic acid, hexahydroterephthalic acid, ethylene glycol, diethylene glycol, triethylene glycol, and neopentyl glycol.
8.
A film as claimed in claim 1, wherein the outer layers A and C have a thickness of from 0.
2 to 6 .
mu.
m.
9.
A film as claimed in claim 1, wherein the outer layers A and C have a thickness of from 0.
3 to 5.
5 .
mu.
m.
10.
A film as claimed in claim 1, wherein the outer layers A and C have a thickness of from 0
|
| Related patents |
|
|
Unilaterally mat, sealable, UV-stabilized, flame resistant, co-extruded, biaxially oriented polyester film, method for the production and the use thereof
OF THE INVENTION A transparent, UV-resistant, sealable, and biaxially oriented polyester film with one matt side is therefore provided and in particular has very good ...
|
|
|
White, sealable, flame-retardant, biaxially oriented polyester film, its use and process for its production
OF THE INVENTION The non-sealable outer layer C preferably has a coefficient of friction COF smaller than 0.5, average roughness R.sub.a of from 40 to 100 nm, a value ...
|
|
|
Matt, flame-retardant, co-extruded polyester film, a method for the production thereof and the use of the same
OF THE INVENTION Flame retardancy means that in what is known as a fire protection test the film complies with the conditions of DIN 4102 Part 2 and in particular the ...
|
|
|
Article comprising a passive optical waveguide
In a broad sense, the invention is an article which comprises a polymeric waveguiding film mounted on a substantially planar surface of a base member. The film comprises ...
|
|
|
Resin laminate containing syndiotactic styrene-based polymer
What is claimed is: 1. A resin laminate comprising two biaxially stretched layers of a styrene-based polymer selected from the group consisting of polystyrene, poly(...
|
|
|
Hologram with integral printed indicia
OF THE FIGURES FIG. 1 shows a card 10, e.g., of a type similar to a common credit card, having four different kinds of viewable indicia thereon. The card includes ...
|
|
|
Modified copolyesters and improved multilayer reflective films
Generally, the present invention relates to a multilayered polymer film. One embodiment is a multilayered polymer film which includes a plurality of first layers and a ...
|
|
|
Transparent and semitransparent diffractive elements, particularly holograms and their making process
What is claimed is: 1. Diffractive elements consisting at least of two layers with a different index of refraction, whereof a first bearing layer is a transparent ...
|
|
|
Embossable thermoplastic polyester film and method for producing the film
We discovered a method to render the PET embossable via the incorporation of a unique surface coating. This coating can be applied to PET film during the film making ...
|
|
|
Blow molded plastic container and method
In accordance with the present invention, the foregoing objects and advantages may be readily obtained. The present invention includes a plastic preform for forming blow ...
|
|
|
Nonmetallic Processes 
