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A kind of polyethylene composition and anti-fogging film

A technology of polyethylene and composition, which is applied in the field of polyethylene composition and anti-fogging film, which can solve the problems of poor film-forming property, insufficient, easy-to-crack and anti-fogging property, etc., and achieve low haze, strength and puncture resistance The effect of good ability, excellent optical performance and mechanical performance

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 existence of poor film-forming properties and easy rupture of the film when the existing polyethylene raw materials are prepared by the flat film stretching method to prepare polyethylene films (that is, it is not suitable for preparing films by the flat film stretching method) and anti-fog Insufficient dripping property, and provide a new polyethylene composition and an anti-fogging film made of the polyethylene composition

Method used

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  • A kind of polyethylene composition and anti-fogging film
  • A kind of polyethylene composition and anti-fogging film
  • A kind of polyethylene composition and anti-fogging film

Examples

Experimental program
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Embodiment approach

[0022] According to a preferred embodiment of the present invention, the linear low density polyethylene contains component A, component B and component C; the melt index MI of the component A at a temperature of 190°C under a load of 2.16kg A 0.01-3.5g / 10min, density ρ A 0.880-0.936g / cm 3 ; The melt index MI of the component B at a temperature of 190°C and a load of 2.16kg B 3.6-14.9g / 10min, density ρ B 0.910-0.930g / cm 3 ; The melt index MI of the component C at a temperature of 190°C and a load of 2.16kg C 15-150g / 10min, density ρ C 0.880-0.930g / cm 3 .

[0023]According to the polyethylene composition provided by the present invention, preferably, the melt index MI of the component A at a temperature of 190°C and a load of 2.16kg A 0.01-3g / 10min, the melt index MI of the component B at a temperature of 190°C and a load of 2.16kg B 4-10g / 10min, the melt index MI of the component C at a temperature of 190°C and a load of 2.16kg C It is 15-100g / 10min. More preferably,...

Embodiment 1

[0054] This example is used to illustrate the polyethylene composition and anti-fogging film provided by the present invention.

[0055] The polyethylene composition provided in this embodiment is composed of component A, component B, component C, anti-dripping and anti-fogging agent and lubricant. The component A, component B and component C are linear low density polyethylene (LLDPE) of ethylene / alpha olefin copolymerization, wherein, component A and component B adopt Ziegler-Natta catalyst (the The Ziegler-Natta catalyst system is prepared from the Ziegler-Natta catalyst system prepared in Example 1 of CN101838351A, the same below), and component C adopts a metallocene catalyst (the metallocene catalyst system is implemented by CN102453124A The supported metallocene catalyst prepared by example 1, the same below) is prepared, and the specific steps are as follows:

[0056] Add ethylene, α-olefin, hydrogen and nitrogen (ethylene, α-olefin, hydrogen and nitrogen are of polym...

Embodiment 2

[0069] This example is used to illustrate the polyethylene composition and anti-fogging film provided by the present invention.

[0070] The polyethylene composition provided in this embodiment is composed of component A, component B, component C, anti-dripping and anti-fogging agent and lubricant. The component A, component B and component C are linear low density polyethylene (LLDPE) copolymerized with ethylene / alpha olefin, wherein, component A and component B are prepared by Ziegler-Natta catalyst, Component C is prepared using a metallocene catalyst, and the specific steps are as follows:

[0071] Add ethylene, α-olefin, hydrogen and nitrogen into the fluidized bed gas phase reactor, then add the catalyst system, and then polymerize at a temperature of 88°C and a pressure of 1.8MPa to obtain component A and component B respectively 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 o...

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Abstract

The invention provides a polyethylene composition and an anti-fogging film. The polyethylene composition contains linear low density polyethylene copolymerized by ethene and alpha-alkene as well as an anti-dropping and anti-fogging agent, wherein the weight average molecular weight Mw of the polyethylene composition is 0.1 million g / mol-0.2 million g / mol, the ratio of Mw / Mn is 4.5-8.5, the ratio of Mz / Mw is 4.5-6.5, and the ratio of Mz+1 / Mw is 7.5-13.0. The polyethylene composition employs a flat film stretching method for preparing the polyethylene film, stretching multiplying power is large, film forming rate is high, film forming ability is very good, and the anti-fogging performance is excellent.

Description

technical field [0001] The invention relates to a polyethylene composition and an anti-fogging 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 ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L71/02C08K5/00C08J5/18
CPCC08J5/18C08J2323/06C08J2471/02C08L23/0815C08L2203/16C08L71/02C08K5/00
Inventor 施红伟高达利魏东张师军郭梅芳乔金樑唐毓婧李汝贤盛建昉于鲁强
Owner CHINA PETROLEUM & CHEM CORP