JP2002234959A - Compound of polyvinyl alcohol resin coating agent for oriented film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the adhesive property of polyvinyl alcohol resins to an oriented film. SOLUTION: The adhesive property to oriented films is improved by adding a silane coupling agent and alcoholic solvent such as IPA to the polyvinyl alcohol resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND ART A barrier packaging material coated with a polyvinyl alcohol resin is used as a coat film instead of a PVDC-coated barrier packaging material.

[0002]

2. Description of the Related Art When an isocyanate is added to a polyvinyl alcohol resin for coating, a stretched film of polyolefin, polyester, polystyrene or the like is subjected to an easy adhesion treatment and coated off-line.

[0003]

The stretched film of polyolefin, polyester, polystyrene or the like is coated with a polyvinyl alcohol resin by an easy adhesion treatment. .

[0004]

A silane coupling agent (for example, a vinyl group, an epoxy group, an amino group, a methacryl group,
(Having a mercapto group, a methoxy group, and an ethoxy group) to increase the adhesiveness to a stretched film such as polyolefin, polyester, and polystyrene. As a result, the adhesion is improved without performing the easy adhesion treatment, and the in-line coating can be performed. Furthermore, it is also possible to improve the adhesiveness by adding IPA as an auxiliary agent. As the antiblocking agent, an organic fine particle polymer or an inorganic filler is effective.

[0005]

EXAMPLES A polyvinyl alcohol resin and a 12% aqueous solution of the polyvinyl alcohol resin were adjusted. This was used to prepare the following formulation 1 at a solid content ratio. The above Formulations 1 to 3 and Comparative 1 were coated on polyester and polypropylene films, respectively, and the suitability for stretching was checked. Thereafter, heat treatment was performed at 150 to 200 ° C. × 10 seconds, and adhesion was observed. The results shown in Table 1 were obtained.

[0006]

Effect of the Invention By blending a silane coupling agent and IPA, the adhesiveness is improved and in-line coating is possible.

Continued on the front page F-term (reference) 4F006 AA12 AA15 AA35 AB20 AB67 BA01 CA07 4F100 AH06A AH06C AK03B AK12B AK21A AK21C AK25 AK41B AL05A AL05C AL06A AL06C BA02 BA03 BA06 BA07 BA10A BA10C DE01 EJ37J04E42J04H KA03 KA42 MA11

Claims (3)

[Claims] A silane coupling agent (for example, having a vinyl group, an epoxy group, an amino group, a methacryl group, a mercapto group, a methoxy group, and an ethoxy group) is added to polyvinyl alcohol and a modified polyvinyl alcohol resin in an amount of 0.1 to 0.1.
1.0 part and 0 to 5 parts of an alcoholic solvent such as IPA are added, and after drying, heat treatment is performed at 150 to 300 ° C. for 5 to 90 seconds to improve adhesion to a stretched film such as polyolefin, polyester, and polystyrene. 2. It is effective for both in-line coating and off-line coating. 3. An organic fine particle polymer or an inorganic filler is added as an antiblocking agent. [0001]