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

Multilayered structure

A multi-layer structure, layer structure technology, applied in layered products, synthetic resin layered products, applications, etc., can solve problems such as leakage of fuel and tap water adhesion, and achieve excellent interlayer adhesion strength, excellent flexibility, Excellent oxygen barrier properties

Inactive Publication Date: 2015-11-25
MITSUBISHI GAS CHEM CO INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, fuel pipes such as kerosene pipes are also buried underground. These fuel pipes are usually mainly made of copper, and fuel may leak slightly into the soil due to deterioration of the fuel pipes.
Therefore, when fuel pipes are buried near water pipes buried underground, the fuel leaked from the fuel pipes permeates into the water in the polyethylene pipes, causing the tap water to have a fuel odor.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multilayered structure
  • Multilayered structure
  • Multilayered structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0171] The present invention will be described more specifically by the following examples, but the present invention is not limited to these examples. In addition, various evaluations in Examples and Comparative Examples were performed by the following methods.

[0172] (1) Oxygen barrier properties (oxygen transmission rate)

[0173] According to JISK7126, using OX-TRAN (registered trademark) 2 / 21 (manufactured by MOCON Co., Ltd.), under the conditions of 23°C and 60%RH, the oxygen transmission rate (unit: cc / m 2 ·atm·day) for measurement.

[0174] (2) Pinhole resistance (number of pinholes)

[0175] Cut the produced stretched film with a total thickness of 25 μm into a square of 210 mm, use a Gelbo flex tester (manufactured by Rigaku Kogyo Co., Ltd.), set the axial direction of the Gelbo flex tester as the measurement direction, and set the temperature at 23° C. and 60% RH The number of pinholes when bending 1,000 times was measured under the environment. The pinhole m...

manufacture example 1

[0196] (Manufacture example 1) Manufacture of polyether polyamide b1

[0197] Put 650.37 g of adipic acid, 0.6125 g of sodium hypophosphite monohydrate, and 0.4266 g of sodium acetate into a reaction container with a volume of about 3 L equipped with a stirrer, a nitrogen gas inlet, and a condensed water outlet, and fully replace the container with nitrogen. Thereafter, the added components were melted at 170° C. while nitrogen gas was supplied into the container at 20 ml / min. While slowly raising the temperature in the container to 260° C., 588.04 g of m-xylylenediamine (MXDA) (manufactured by Mitsubishi Gas Chemical Co., Ltd.) and polyetherdiamine (manufactured by HUNTSMAN, USA, Jeffamine (registered trademark) were added dropwise into the container. ) ED-900, based on the product catalog of the HUNTSMAN company in the United States, the -OR in the aforementioned general formula (1-2) 1 -for-OCH(CH 3 )CH 2 -or-OCH 2 CH(CH 3 )-, the approximate number of x2+z2 is 6.0, th...

manufacture example 2

[0198] (Manufacture example 2) Manufacture of polyether polyamide b2

[0199] Put 584.60 g of adipic acid, 0.5933 g of sodium hypophosphite monohydrate, and 0.4133 g of sodium acetate into a reaction container with a volume of about 3 L equipped with a stirrer, a nitrogen gas inlet, and a condensed water outlet, and fully replace the container with nitrogen. Thereafter, the added components were melted at 170° C. while nitrogen gas was supplied into the container at 20 ml / min. While slowly raising the temperature in the container to 260° C., 516.52 g of m-xylylenediamine (MXDA) (manufactured by Mitsubishi Gas Chemical Co., Ltd.) and polyether diamine (manufactured by HUNTSMAN, USA, Jeffamine (registered trademark)) were added dropwise into the container. )XTJ-542, based on the product catalog of HUNTSMAN Company in the United States, the -OR in the aforementioned general formula (1-1) 1 -for-OCH(CH 3 )CH 2 -or-OCH 2 CH(CH 3 )-, the approximate number of x1+z1 is 6.0, the ...

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
melting pointaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention comprises a multilayered structure that has a polyamide layer (A) and a polyether-polyamide layer (B). The present invention also comprises a multilayered structure that has a polyolefin layer (C) and a polyether-polyamide layer (B), wherein: the abovementioned polyamide layer (A) contains a polyamide (a) in which diamine constitutional units include constitutional units derived from a xylylenediamine (a-1) and dicarboxylic-acid constitutional units include constitutional units derived from a C4 - 20 α,ω-linear aliphatic carboxylic acid (a-2); and the abovementioned polyether-polyamide layer (B) contains a polyether-polyamide (b) in which diamine constitutional units include constitutional units derived from a polyether-diamine compound (b-1) having a specific structure and a xylylenediamine (b-2) and dicarboxylic-acid constitutional units include constitutional units derived from a C4 - 20 α,ω-linear aliphatic carboxylic acid (b-3).

Description

technical field [0001] The present invention relates to a multilayer structure excellent in pinhole resistance, oxygen barrier properties, and interlayer adhesion strength, and a multilayer structure excellent in flexibility and fuel barrier properties. Background technique [0002] In order to suppress food deterioration, rotting, oxidation, and other deterioration caused by oxygen, resins having oxygen barrier properties are being used as food packaging materials. Among them, poly-m-xylylene adipamide (MXD6) is known as a resin excellent in oxygen barrier properties, and is being used as packaging materials for a wide variety of foods. [0003] On the other hand, since MXD6 has poor flexibility and poor pinhole resistance, various studies are underway to achieve a food packaging material that improves the deterioration of pinhole resistance and exhibits high gas barrier properties. For example, Patent Document 1 proposes a laminated film in which a polyamide layer contain...

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): B32B27/32B32B1/08C08G69/40
CPCB32B27/34B32B1/08C08G69/265C08G69/40C08L77/06B32B27/08B32B27/32B32B2250/24B32B2307/7244B32B2307/7265B32B2597/00
Inventor 佐藤和哉加藤智则菊地真由美
Owner MITSUBISHI GAS CHEM CO INC