Dai Nippon Printing Co., Ltd.

Azusa Suzuki

Yoshihiro Kishimoto

Shigeki Matsui

Kazutoshi Haraguchi

Takeshi Nishizono

Yasunari Iio

Hiroyuki Iwahashi

Shohei Itami

Kanari Aono

Provided are: a laminate film which is equipped with a vapor-deposited aluminum oxide film exhibiting high barrier performance and excellent so-called retort resistance, and also exhibits favorable adhesion between the vapor-deposited aluminum oxide film and a plastic substrate even after undergoing a hydrothermal treatment; a barrier laminate film containing the laminate film; and a barrier packaging material which uses the barrier laminate film. A laminate film exhibiting improved adhesion strength and barrier performance, wherein: a transition region prescribing adhesion strength is formed between the surface of the substrate film and the vapor-deposited film which primarily comprises the formed vapor-deposited aluminum oxide film, by subjecting the vapor-deposited aluminum oxide film of the laminate film to a time-of-flight secondary ion mass spectrometry (TOF-SIMS) method using a Cs (cesium) ion gun; the transition region contains elementally bonded AlOH, which can be modified into aluminum hydroxide which can be detected by etching using TOF-SIMS; and the rate of modification in the transition region into aluminum hydroxide, which is defined as the ratio of the modified transition region to the vapor-deposited aluminum oxide film specified by carrying out etching using TOF-SIMS, is prescribed to be 5-60%, inclusive.

Barrier laminate film, and packaging material which uses barrier laminate film

The present invention addresses the problem of providing a barrier resin film exhibiting excellent barrier properties without adopting a multilayer structure such as the structures used by the prior art. A barrier resin film obtained by forming a vapor-deposited aluminum oxide film on the surface of a resin substrate, wherein an elementally bonded structural unit represented by Alis distributed in the vapor-deposited aluminum oxide film, and the intensity ratio (Al/AlO&#xd7;100) of the maximum Alconcentration elementally bonded structure section according to Time-of-Flight secondary ion mass spectrometry (TOF-SIMS) is 1-20, inclusive.

Barrier resin film, barrier laminate and packaging material using barrier laminate

The invention provides a gas barrier film with low deterioration in the gas barrier property before and after high-temperature hot water treatment. The gas barrier film has a gas barrier coating film, formed as a composite film comprising a network structure having a mesh structure with Si&#x2014;O&#x2014;Si bonds as the basic lattice and a water-soluble polymer crystallized as microcrystals, incorporated into the mesh of the network structure, wherein a barrier coating agent, obtained by mixing a condensate solution of an alkoxysilane hydrolysate prepared as a mixed solution in which the proportion of bonded states of the silicon atoms of the condensate with Q1 and Q2 structures is at least 60% of the total silicon atoms, with a crystalline water-soluble polymer, is coated on a base material film, either after forming or without forming an aluminum oxide vapor deposition film, to form a coating layer.

Gas barrier film and method for producing it

Growing community of inventors

Tokyo, Japan

Azusa Suzuki