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Polyethylene composition and inflaming-retarding thin film

A technology of flame-retardant film and polyethylene, which is applied in the field of polyethylene composition and flame-retardant film, and can solve the problems of easy cracking of the film, poor flame-retardant performance of polyethylene film, and poor film-forming property

Active Publication Date: 2017-04-05
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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  • Polyethylene composition and inflaming-retarding thin film
  • Polyethylene composition and inflaming-retarding thin film

Examples

Experimental program
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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. Ethylene (LLDPE), wherein, component A and component B are prepared using metallocene catalyst (the metallocene catalyst system is the loaded metallocene catalyst prepared by CN102453124A embodiment 1, the same below), and component C is prepared by A Ziegler-Natta catalyst was prepared (the Ziegler-Natta catalyst system is the Ziegler-Natta catalyst system prepared in Example 1 of CN101838351A, the same below). 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 removing water and oxygen, the same below) into the fluidized bed gas phase ...

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. Ethylene (LLDPE), wherein, components A and B are prepared using metallocene catalysts, and component C is prepared using Ziegler-Natta catalysts. Specific steps are as follows:

[0062] Add ethylene, alpha olefin, hydrogen and nitrogen into the fluidized bed gas phase reactor, then add the catalyst system, and then polymerize under the conditions of temperature 84-88°C and pressure 1.8-2.0MPa to obtain components A, Component B and Component C. Among them, the control of the melt index of component A, component B and component C is realized by adjusting the amount of hydrogen added, and the control of density is realized by adjusting the type and amou...

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Abstract

The invention provides a polyethylene composition and an inflaming-retarding thin film. The polyethylene composition comprises a component A, a component B, a component C and a fire retardant; the component A is ethylene / alpha olefin copolymerization linear low-density polyethylene with the melt index MIA being 0.01-2 g / 10min and the density rho A being 0.880-0.936 g / cm<3> at the temperature of 190 DEG C and under the load of 2.16 kg; the component B is ethylene / alpha olefin copolymerization linear low-density polyethylene with the melt index MIB being 2.1-9.9 g / 10min and the density rho B being 0.910-0.930 g / cm<3> at the temperature of 190 DEG C and under the load of 2.16 kg; and the component C is ethylene / alpha olefin copolymerization linear low-density polyethylene with the melt index MIC being 10-80 g / 10min and the density rho C being 0.880-0.930 g / cm<3> at the temperature of 190 DEG C and under the load of 2.16 kg. When the polyethylene thin film is prepared from the polyethylene composition through the flat film tensile method, the tensile ratio is large, the film forming speed is high, the film forming property is very good, and the obtained polyethylene thin film has an excellent inflaming retarding property.

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 Applications(China)
IPC IPC(8): C08F210/16C08F2/34C08K3/32C08K5/053C08L23/08B29C47/06B29C55/14
Inventor 白弈青高达利张师军权慧徐毅辉初立秋邵静波吕芸张琦侴白舸
Owner CHINA PETROLEUM & CHEM CORP
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