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A kind of polyethylene composition and flame retardant film

A technology of flame-retardant film and polyethylene, which is applied in the direction of synthetic resin layered products, chemical instruments and methods, and layered products, and can solve problems such as poor film-forming properties, poor flame-retardant properties of polyethylene films, and easy cracking of films

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the poor film-forming property and easy rupture of the film when the existing polyethylene raw material is prepared by the flat film stretching method, which is not suitable for the preparation of the film by the flat film stretching method, and the obtained The defect that the flame retardant performance of polyethylene film is poor, and a kind of new polyethylene composition and the flame retardant film made by this polyethylene composition are provided

Method used

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  • A kind of polyethylene composition and flame retardant film
  • A kind of polyethylene composition and flame retardant film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] According to a preferred embodiment of the present invention, the polyethylene composition is figure 1 Prepared in the shown multi-reactor parallel device, described multi-reactor parallel device comprises first reactor 1, second reactor 2, third reactor 3, solid / liquid (gas) separator 4, homogenizer The silo 5 and the melt granulation system 6, wherein the first reactor 1, the second reactor 2 and the third reactor 3 are connected in parallel, and the number of the solid / liquid (gas) separator 4 is three One, communicated with the first reactor 1, the second reactor 2 and the third reactor 3 respectively, the component A produced by the first reactor 1, the component B produced by the second reactor 2 and the component B produced by the third reactor The component C prepared by the reactor 3 is carried out phase separation in different solid / liquid (gas) separators 4 respectively, and then the component A, component B and component C after the phase separation will be ...

Embodiment 1

[0045] This example is used to illustrate the polyethylene composition and the flame retardant film provided by the present invention.

[0046] (1) Preparation of polyethylene composition:

[0047] The polyethylene composition provided in this example is composed of Component A, Component B, Component C and a flame retardant, wherein Component A, Component B and Component C are all ethylene / α-olefin copolymerized linear low Density polyethylene (LLDPE), and all adopt identical catalyst system (Ziegler-Natta catalyst, it is prepared by the Ziegler-Natta catalyst system that CN101838351A embodiment 1 obtains, the same below) and polymerization process preparation, difference The amount of hydrogen added and the type and molar content of α-olefin comonomers are different when preparing different components. Specific steps are as follows:

[0048] Add ethylene, α-olefin, hydrogen and nitrogen (ethylene, α-olefin, hydrogen and nitrogen are of polymerization grade, used after remo...

Embodiment 2

[0059] This example is used to illustrate the polyethylene composition and the flame retardant film provided by the present invention.

[0060] (1) Preparation of polyethylene composition:

[0061] The polyethylene composition provided in this example is composed of Component A, Component B, Component C and a flame retardant, wherein Component A, Component B and Component C are all ethylene / α-olefin copolymerized linear low Density polyethylene (LLDPE), and both are prepared by the same catalyst system (Ziegler-Natta catalyst) and polymerization process, the difference lies in the amount of hydrogen added when preparing different components and the type and mole of α-olefin comonomers Content varies. Specific steps are as follows:

[0062] Add ethylene, alpha olefin, hydrogen and nitrogen into the fluidized bed gas phase reactor, then add the Ziegler-Natta catalyst system, and then polymerize under the conditions of temperature 84-88°C and pressure 1.8-2.0MPa, Component A, ...

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Abstract

The invention provides a polyethylene composition and a flame retardant film. The polyethylene composition contains a component A, a component B, a component C and a flame retardant; the component A is ethylene / alpha-olefin copolymerized linear low density polyethylene, the melt index MIA at a temperature of 190 DEG C and under a load of 2.16 kg is (0.01-3.5)g / 10min, and the density rhoA is 0.880-0.936 g / cm3; the component B is ethylene / alpha-olefin copolymerized linear low density polyethylene, the melt index MIB at a temperature of 190 DEG C and under a load of 2.16 kg is (3.6-9.9)g / 10min, and the density rhoB is 0.910-0.930 g / cm3; and the component C is ethylene / alpha-olefin copolymerized linear low density polyethylene, the melt index MIC at a temperature of 190 DEG C and under a load of 2.16 kg is (10-80)g / 10min, and the density rhoC is 0.880-0.930 g / cm3. The polyethylene composition has the advantages of large stretch rate, high film formation rate and very good film formation ability when the polyethylene composition undergoes a flat film stretching technology to produce a polyethylene film, and the obtained polyethylene film has excellent flame retardation performance.

Description

technical field [0001] The invention relates to a polyethylene composition and a flame-retardant film. Background technique [0002] Biaxially Oriented Polyethylene (BOPE) film is a film material formed by a polyethylene (PE) resin with a special molecular structure through a biaxial stretching process. In the forming process of BOPE film, after the film is stretched, the PE macromolecular chain and crystal structure are highly oriented, which significantly improves the tensile strength of the film, reduces the tensile elongation at break, and makes the film Lower haze, higher gloss and better clarity. In addition, compared with polyethylene film products prepared by extrusion blow molding process and extrusion casting process in the prior art, BOPE film has high mechanical strength, good puncture resistance and impact resistance, excellent optical properties, energy saving and environmental protection, etc. Advantage. Therefore, BOPE film can be widely used in packaging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K3/32C08K5/053B32B27/32B29C55/12
CPCB29C55/12B32B27/32B32B2250/03B32B2250/242C08J5/18C08J2323/08C08J2423/08C08L23/0815C08L2201/02C08L2203/16C08L2205/025C08L2205/03C08K2003/323C08K5/053
Inventor 白弈青高达利施红伟张师军郭梅芳张丽英郭鹏徐耀辉刘建叶解娜徐毅辉
Owner CHINA PETROLEUM & CHEM CORP
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