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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 field of polyethylene composition and flame retardant film, can solve the problems of poor flame retardant performance, poor film forming property, and easy film rupture of polyethylene film.

Active Publication Date: 2019-05-31
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
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Embodiment approach

[0029] According to a preferred embodiment of the present invention, the polyethylene composition is figure 1 It is prepared in the multi-reactor parallel device shown, and the multi-reactor parallel device includes a first reactor 1, a second reactor 2, a third reactor 3, a solid / liquid (gas) separator 4, a homogenization Silo 5 and 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 each, 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 components C prepared in the reactor 3 are respectively phase-separated in different solid / liquid (gas) separators 4, and then the phase-separated components A, B and C are transported to the same proportions...

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 consists of component A, component B, component C and a flame retardant, and component A, component B and component C are all linear low-density polyethylene / alpha olefin copolymers. Ethylene (LLDPE), wherein component A and component B are prepared by using Ziegler-Natta catalyst (the Ziegler-Natta catalyst system is the Ziegler-Natta catalyst system prepared in Example 1 of CN101838351A Catalyst system, the same below), component C is prepared by using a metallocene catalyst (the metallocene catalyst system is the supported metallocene catalyst prepared in Example 1 of CN102453124A, the same below). Specific steps are as follows:

[0048] Ethylene, alpha olefin, hydrogen and nitrogen (ethylene, alpha olefin, hydrogen and nitr...

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 consists of component A, component B, component C and a flame retardant, and component A, component B and component C are all linear low-density polyethylene / alpha olefin copolymers. Ethylene (LLDPE), wherein component A and component B are prepared by using Ziegler-Natta catalyst, and component C is prepared by using metallocene catalyst. Specific steps are as follows:

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

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Abstract

The invention provides a polyethylene composition and a flame retardant film. The polyethylene composition comprises a component A, a component B, a component C and a flame retardant, wherein the component A is ethylene / alpha olefin copolymerized linear low-density polyethylene which has a melt index MIA ranging from 0.01 g / 10min to 3.5g / 10min under load of 2.16 kg at a temperature of 190 DEG C, and has density rhoA ranging from 0.880 g / cm<3> to 0.936 g / cm<3>; the component B is ethylene / alpha olefin copolymerized linear low-density polyethylene which has a melt index MIB ranging from 3.16 g / 10min to 14.9 g / 10min under load of 2.16 kg at a temperature of 190 DEG C, and has density rhoB ranging from 0.910 g / cm<3> to 0.930 g / cm<3>; and the component C is ethylene / alpha olefin copolymerized linear low-density polyethylene which has a melt index MIC ranging from 15 g / 10min to 150 g / 10min under load of 2.16 kg at a temperature of 190 DEG C, and has density rhoC ranging from 0.880 g / cm<3> to 0.930 g / cm<3>. When the polyethylene composition adopts a flat film stretching method to prepare the polyethylene film, a stretching ratio is great, film forming speed is high, and film-forming property is very good; and moreover, the obtained polyethylene film has excellent flame resistance.

Description

technical field [0001] The present 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 biaxially stretching polyethylene (PE) resin with special molecular structure. In the forming process of BOPE film, after the film is stretched, the PE macromolecular chain and crystalline structure are highly oriented, which significantly improves the tensile strength of the film, reduces the tensile elongation at break, and makes the film's 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 bags, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/16C08F2/34C08K3/32C08K5/053C08L23/08B29C55/14
Inventor 白弈青高达利邹浩张师军初立秋权慧徐凯邵静波徐萌吕芸侴白舸
Owner CHINA PETROLEUM & CHEM CORP
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