Easy-open sealing film and use thereof

A sealing film and easy-opening technology, which can be used in flexible coverings, other chemical processes, transportation and packaging, etc., can solve the problems of heat-sealable finger openings, etc., and achieve excellent finger opening properties and stable tube bubbles excellent effect

Active Publication Date: 2022-05-10
PRIME POLYMER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heat sealability and finger-openability are not addressed

Method used

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  • Easy-open sealing film and use thereof
  • Easy-open sealing film and use thereof
  • Easy-open sealing film and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0219] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to these examples.

[0220]

[0221] The analysis method and evaluation method of the ethylene-based polymer (A1) are as described in the above description, and the methods not described in the above description are as follows. The same is true for the analysis and evaluation methods of ethylene-based polymers other than ethylene-based polymers (A1).

[0222] [Zero-shear viscosity (η 0 )]

[0223] Zero shear viscosity at 200°C [η 0 (P)] is obtained as follows.

[0224] Shear viscosity (η * ) The angular velocity [ω(rad / sec)] distribution was measured in the range of 0.02512≤ω≤100. For the measurement, a dynamic stress rheometer SR-5000 manufactured by Rheometrics Co., Ltd. was used. The sample holder used The parallel plate, the sample thickness is set to about 2.0mm. The measurement points were measured at 5 points for each order...

preparation example X

[0271] Based on the descriptions of "Catalyst Preparation Example XP-1", "Catalyst Preparation Example XP-2" and "Catalyst Preparation Example XP-3" of Japanese Patent Application Laid-Open No. 2017-25340, pre-polymerization catalyst components (XP-1) were produced respectively , (XP-2), (XP-3). A specific production method will be described below.

preparation example XP－

[0272] [Catalyst Preparation Example XP-1]

[0273] (Preparation of solid support (X-1))

[0274] In a reactor with a stirrer with an inner volume of 270 liters, under a nitrogen atmosphere, silica gel (manufactured by Fuji SILYSIA Co., Ltd.: average particle size 70 μm, specific surface area 340 m 2 / g, micropore volume 1.3cm 3 / g, dried at 250°C for 10 hours) 10kg was suspended in 77 liters of toluene and cooled to 0-5°C. To this suspension, 19.4 liters of a toluene solution of methylaluminoxane (3.5 mmol / mL in terms of Al atoms) was dropped over 30 minutes. At this time, the temperature in the system was maintained at 0 to 5°C. After continuing the contact at 0-5°C for 30 minutes, the temperature in the system was raised to 95°C over about 1.5 hours, and the contact was continued at 95°C for 4 hours. After cooling down to normal temperature, the supernatant was removed by decantation, and washed twice with toluene to prepare a toluene slurry with a total amount of 115 l...

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Abstract

An object of the present invention is to provide an easily-openable sealing film excellent in heat-sealability and finger-openability. The solution is an easy-to-open sealing film, which contains an ethylene polymer composition, and the ethylene polymer composition is based on a weight ratio of ethylene polymer: high-pressure low-density polyethylene = 1:99~ The ratio of 99:1 contains ethylene-based polymer and high-pressure low-density polyethylene, wherein the ethylene-based polymer is a long-chain branched type of ethylene-C that satisfies certain conditions 4－10 alpha-olefins.

Description

technical field [0001] The present invention relates to an vinyl polymer composition for an easy-open sealing film, its use, and the like. More specifically, it relates to an ethylene-based polymer composition for an easily-openable sealing film preferably used for food, beverage, medical, and other container packaging materials, its use, and the like. Background technique [0002] As we all know, generally speaking, laminated films used for packaging materials are polyethylene films manufactured by blow molding or cast molding and dry lamination or extrusion lamination with paper, cardboard, polypropylene film, polyparaphenylene, etc. It is produced by bonding substrates such as ethylene glycol diformate film, nylon film, metal foil, metal vapor-deposited film, and ceramic vapor-deposited film. Among these substrates, when used for substrates such as aluminum foil and paper, which are relatively weaker than plastic films, it is often strongly desired that packaging materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08B65D65/40C08J5/18C09K3/10
CPCB65D65/40C08J5/18C08L23/08C09K3/10
Inventor 柳下芳雄原田恭行
Owner PRIME POLYMER CO LTD
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