Unlock instant, AI-driven research and patent intelligence for your innovation.

Interdraw pretreatment for polyester film

A technology of polyester film and film, applied in the field of polyester film, can solve the problems of polyester film not easily coated with gelatin, poor adhesion, etc.

Inactive Publication Date: 2002-07-31
DUPONT TEIJIN FILMS U S LLP
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unpriced mylar is not easily coated with gelatin
Poor adhesion between hydrophobic unmarked polyester film and hydrophilic gelatin

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] Polymer preparation and thin film fabrication processes are well known to those skilled in the art and have been disclosed in many works such as Encyclopedia of Polymer Science and Engineering (Encyclopedia of Polymer Science and Engineering) published by New York Wiley Press. Second Edition, Volume 12, pp. 1-313, and many patents, such as British Patent 838,708. This polymer is generally formed by polycondensation of a suitable dicarboxylic acid or its lower alkyl diester with ethylene glycol. Polyethylene terephthalate is formed from terephthalic acid; polyethylene naphthalate Esters are formed from 2,7-naphthalene dicarboxylic acid.

[0018] The thickness of the polyester film is not critical and should be suitable for the purpose of the coated polyester film. The thickness of the polyester film is generally less than about 250 μm, typically less than about 175 μm, preferably less than 50 μm, more preferably between 12 and 25 μm.

[0019] co...

Embodiment 1

[0075] This example illustrates a method of making a coating composition and coating a polyethylene terephthalate film.

[0076] Add Eastek to 55 gallon mix tank  1300 (43.6L) and start stirring. Add deionized water while stirring for thorough mixing until tank contents reach 25 gallon mark. The following materials were then added to the resulting dispersion in the order shown: 800 mL of Lupasol TM FG (neat), 40mL Lupasol TM L (neat), 40mL Tetronic  90R4, 1.46L OX-50 (32% solution in ethylene glycol) and 1.9L Renex  690 (20% aqueous solution). Deionized water was added with stirring until the contents of the tank reached the 50 gallon mark and the resulting dispersion was stirred for an additional 15 minutes. The resulting coating composition had a total solids content of 8.7%.

[0077] The resulting coating composition was used for intermediate stretch coating during the manufacture of polyethylene terephthalate films. The wet coating thickness measured with an inf...

Embodiment 2

[0079] This example illustrates a method of making a coating composition and coating a polyethylene terephthalate film. The procedure of Example 1 was repeated except that Lupasol was replaced by 800 mL of triaminononane (10% solution) TM FG with 40mL Lupasol TM SKA (1% solution) instead of Lupasol TM p. The resulting coating composition had a total solids content of 8.7%.

[0080] The coating composition was used for intermediate stretch coating during the manufacture of polyethylene terephthalate film. The wet coating thickness measured with an infrared gauge was 6.5-7.5 μm. The dry coating thickness was 0.16 μm. Dry coating weight is 0.024g / m 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

An oriented polyester film coated on at least one surface with a coating that improves its adhesion to gelatin is disclosed. The dry coating contains one or more sulfopolyesters; one or more tetrablock copolymer resins; and one or more non-volatile polyamines. Other ingredients, such as particulate materials and surfactants, may be present in the coating. The coating is preferably applied at the interdraw stage.

Description

field of invention [0001] The present invention relates to a polyester film. More particularly, the present invention relates to an oriented polyester film which is coated on at least one surface with a coating which improves the adhesion of the film to gelatin. Background of the invention [0002] Polymeric linear polyester films have excellent stretch orientation properties and have proven particularly suitable for biaxial film orientation. Such polymer films, especially polyethylene terephthalate or PET, are strong and have excellent inherent chemical and thermal properties. In addition, they have good optical clarity, toughness, and antistatic properties, making them ideal for photographic or copying applications. [0003] In such applications, the polymer film is laminated with a layer of gelatin. However, unpriced mylar is not readily coated with gelatin. Adhesion between hydrophobic unmarked polyester film and hydrophilic gelatin was poor. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/043C08J7/056C09D167/02
CPCY10S428/91C08J2467/00C08J2367/02C09D167/02C08J7/047Y10T428/2843Y10T428/269Y10T428/265Y10T428/24959Y10T428/24967Y10T428/2852Y10T428/24975Y10T428/31768Y10T428/31786Y10T428/31736C08J7/0427C08J7/043C08J7/056C08L2666/20
Inventor J·A·斯蒂奎小C·查佩尔
Owner DUPONT TEIJIN FILMS U S LLP