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Easy-bonding polyamide film and method of making the same

A technology of polyamide film and manufacturing method, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, coatings, etc., to achieve the effects of excellent productivity, excellent adhesion, and easy thickness control

Inactive Publication Date: 2011-12-28
UNITIKA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the invention described in JP-H3-55302B, there is room for improvement in the adhesion to inks and adhesives made of organic components after hot water treatment such as boiling treatment and distillation treatment.

Method used

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  • Easy-bonding polyamide film and method of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] (water-based paint)

[0092] A polyurethane emulsion "HYDRAN KU-400SF (solid content: 25% by mass)" manufactured by DIC Corporation was diluted with ion-exchanged water to prepare an aqueous paint having a resin solid content of 10% by mass.

[0093] (easy bonding polyamide film)

[0094] Nylon 6 (relative viscosity: 3.03 ) was extruded into sheet form from the die opening of the T die head under the condition of 270°C. This sheet-shaped body was closely adhered to a casting roll whose surface temperature was adjusted to 18° C., and quenched to obtain an unstretched polyamide film having a thickness of 150 μm. This unstretched film was introduced into a water tank, and the water absorption was adjusted to 4.0% by mass. After coating the water-based coating agent on the water-absorbing unstretched film by the air knife coating method, it was dried at 60° C. for 10 seconds with a drier. The coated unstretched film is introduced into a biaxial simultaneous stretching m...

Embodiment 2～7

[0100] Compared with Example 1, the polyurethane resin used as the water-based paint was changed. Other than that, the same procedure as in Examples was carried out to obtain a water-based paint having a solid content concentration of 10% by mass, and an easily-adhesive polyamide film was obtained. Table 1 shows various measurement results.

[0101] The polyurethane resin used is as described below.

Embodiment 2

[0102] Example 2: Polyurethane emulsion "HYDRAN ADS-120" manufactured by DIC Corporation (solid content: 50% by mass).

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Abstract

Disclosed is an easy adhesion polyamide film including a substrate polyamide film and a primer layer containing an anionic water-dispersible polyurethane resin, formed on at least one side of the substrate polyamide film. The thickness of the primer layer is 0.025 µm or more and 0.250 µm or less. The anionic water-dispersible polyurethane resin has a coating film elongation percentage of 250% or more and a tensile strength of 20 MPa or more. When the easy adhesion polyamide film is subjected to a heat treatment in a helium gas atmosphere at 200°C for 10 minutes, a total amount of the volatile base components evolved from the easy adhesion polyamide film is 0.50 µg / g or less.

Description

technical field [0001] The present invention relates to an easily-adhesive polyamide film and a manufacturing method thereof, and particularly relates to an easily-adhesive polyamide film and a manufacturing method thereof which are well used for packaging materials, electrical insulating materials, general industrial materials, and the like. Background technique [0002] Biaxially stretched polyamide film not only has excellent mechanical properties, optical properties, thermal properties, and barrier properties, but also has excellent abrasion resistance, impact resistance, and pinhole resistance, so it is widely used as a film for packaging food and other products. Films are used as packaging materials for articles. In these applications, various secondary processes such as coating of various paints, printing, vapor deposition, and lamination with other films are usually performed on the surface of the substrate film. Therefore, the following attempts have been made: by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B29C55/12B32B27/40B29K77/00B29L9/00
CPCB29C55/12B29C55/026B32B27/34B29K2075/00B29K2077/00B29C55/143B32B7/12B32B27/08B32B2255/10B32B2255/26B32B2262/0261B32B2262/062B32B2262/101B32B2262/106B32B2264/10B32B2264/104B32B2264/105B32B2307/31B32B2307/518B32B2307/704B32B2307/7242B32B2307/732B32B2307/734Y10T428/265Y10T428/24843B32B2038/0028B32B2377/00
Inventor 大葛贵良桑田秀树
Owner UNITIKA LTD