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Multilayer container

A container and polyethylene layer technology, applied in the field of improvement of multi-layer containers, can solve the problems of reduced bonding strength and impact resistance of polyamide and modified polyethylene layers, etc.

Inactive Publication Date: 2009-07-15
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem is the reduced bond strength of its polyamide and modified polyethylene layers
Another problem is that the impact resistance is greatly reduced during the recirculation of the flash formed during the blow molding process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A resin material for a multilayer structure of a multilayer container was prepared as described below.

[0043] [Polyamide resin mixture]

[0044] In a reactor with stirring blades, 10 kg of ε-caprolactam was stirred at 100° C. until a uniform reaction system was formed. Then, raise the temperature to 260°C, and apply 15kg / cm 2 Stirring was continued under pressure for at least one hour. Next, the pressure was no longer applied, and the reaction was continued for three hours under normal pressure while removing water by volatilization. After the reaction was terminated, the strand-shaped reaction product was collected through the bottom nozzle of the reactor, water-cooled, and cut into polyamide-6 resin pellets with an average molecular weight of 32000.

[0045] After immersing the pellets in hot water and removing unreacted monomers (approximately 10%) by extraction, they were dried in vacuum, resulting in a polyamide resin used as an adhesive layer according to the...

Embodiment 2

[0060]The procedure of Example 1 was repeated except that 5 g of titanium dioxide having an average particle diameter of 15 nm was used instead of 10 g of titanium dioxide having an average particle diameter of 15 nm in Example 1, thereby manufacturing a multilayer container. Table 1 shows the results.

Embodiment 3

[0062] The procedure of Example 1 was repeated except that 10 kg of ε-caprolactam, 0.9 kg of adipic acid and 2 kg of water were used to prepare a polyamide resin mixture, thereby manufacturing a multilayer container. Table 1 shows the results.

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Abstract

The present invention provides a fuel impermeability, impact resistance, and high recycle multilayer container.The multilayer container includes a polyamide layer, a polyethylene layer and the modified polyethylene layer.The polyethylene layer is formed of a derivative of an unsaturated carboxylic acid or unsaturated carboxylic acid-modified polyethylene is at least one.In the multilayer container, the polyamide layer, the polyethylene layer and the modified polyethylene layer are stacked to form a layered structure.The polyamide layer is formed of a polyamide resin or a mixture comprising a polyamide resin, the polyamide layer containing an average particle diameter of 150nm or less of an inorganic compound, an amount of 100 parts by weight of a polyamide resin or a resin mixture, relative to the inorganic compound not more than 0.2 parts by weight.

Description

technical field [0001] The present invention relates to improvements in multilayer containers, and in particular to containers having high impact resistance, high fuel impermeability, excellent blow molding characteristics, high adhesion of layers in contact with each other, and high resistance to flash formed during blow molding. Recyclability, while other features remain at a satisfactory size. Background technique [0002] Metal and resin products are known as multi-layer containers, and the multi-layer resin containers have the advantages of freedom of shape, light weight, improvement in fuel consumption, reduction of steps in manufacture, and improvement in recyclability. Thus, there is currently a tendency to increase the use and manufacture of multilayer resin containers. As the multi-layer container, there are generally known a multi-layer container formed of a single-layer polyethylene, and a multi-layer container formed of, for example, a multi-layer hollow molded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B1/02B32B27/20B32B1/00B32B27/08B32B27/18B32B27/34B65D90/02
CPCB32B27/34B32B27/18B65D90/022B32B27/08B32B2439/00B32B27/32
Inventor 筱田敦裕熊谷宏姬木浩明
Owner NISSAN MOTOR CO LTD