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Preparation method and application of polyethylene film

A technology of polyethylene film and ethylene, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of additive overflow and affect the application of films, etc., achieve the improvement of space-time yield and heat removal ability , the effect of broad application prospects

Active Publication Date: 2017-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the additives will inevitably involve the problem of overflow, which may affect the application of the film

Method used

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  • Preparation method and application of polyethylene film
  • Preparation method and application of polyethylene film
  • Preparation method and application of polyethylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] This embodiment adopts the TiCl supported by magnesium chloride 3 Main catalyst (main catalyst feed rate 2.18kg / h), Ziegler-Natta catalyst with triethylaluminum as cocatalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0086] The mass flow rate of mixed liquid I is 1.8 t / h, accounting for 0.42% of the mass flow rate of stream II. In the mixed liquid I, the alkane isopentane content accounts for 50% by weight of the mixed liquid (the molar content is 49%), and the olefin content accounts for 50% by weight of the mixed liquid (the molar content is 51%). The content of 1-hexene accounts for 45.1% by weight of the mixed liquid (the molar content is 38.5%). Mixed liquid I also contained 200 ppm of triethylaluminum cocatalyst.

[0087] The superficial fluidization gas velocity in the reactor was 0.75 m / s. The pressure of the reactor was 2.1 MPa, and the temperature was 89°C.

[0088] After...

Embodiment 2

[0095] This embodiment adopts the TiCl supported by magnesium chloride 3 Main catalyst (loading capacity is 1.75kg / h), Ziegler-Natta catalyst with triethylaluminum as cocatalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0096] The mass flow rate of mixed liquid I is 1.3t / h, accounting for 0.30% of the mass flow rate of stream II. In the mixed liquid I, the alkane isopentane content accounts for 45% by weight of the mixed liquid (the molar content is 35%), and the olefin content accounts for 55% by weight of the mixed liquid (the molar content is 65%), wherein the ethylene content accounts for 45% by weight of the mixed liquid (the molar content is 65%). 8.8% by weight (mole content is 17.8%), 1-butene content accounts for 46.2% by weight of the mixed liquid) (molar content is 47.2%), also contains 180ppm triethylaluminum cocatalyst in the mixed liquid.

[0097] The superficial fluidization g...

Embodiment 3

[0106] This embodiment adopts the TiCl supported by magnesium chloride 3 It is a Ziegler-Natta catalyst (feed amount of the main catalyst is 2.03kg / h), and triethylaluminum is used as a cocatalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0107] The mass flow rate of mixed liquid I is 1.7t / h, accounting for 0.37% of the mass flow rate of stream II. In the mixed liquid I, the alkane n-hexane content accounts for 25% by weight of the mixed liquid (the molar content is 25%), and the olefin content accounts for 75% by weight of the mixed liquid (the molar content is 75%), wherein the ethylene content accounts for 7.8% by weight of the mixed liquid. % by weight (23.8% in molar content), the content of 1-octene accounts for 67.2% by weight (51.2% in molar content) of the mixed liquid, and the mixed liquid also contains 180ppm of triethylaluminum cocatalyst.

[0108] The superficial fluidization ga...

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Abstract

The invention discloses a preparation method of a polyethylene film, and the method comprises the following steps: step (1) taking a mixed liquid I as a carrier flow to convey a main catalyst in a catalyst system to a reactor, wherein the mixed liquid I comprises alkane, alkene and a co-catalyst, adding supplementing alkene feedstock into a material flow II which outflows from the reactor to obtain a material flow III and dividing the material flow III into a material flow IIIa and a material flow IIIb, wherein the material flow IIIa and the material flow IIIb separately flow back to the lateral part and the bottom of the reactor, and performing polymerization in the reactor to obtain an ethylene polymer and performing discharging from the reactor, wherein, the alkene comprises alpha-alkene and ethylene, and the molar ratio of the alpha-alkene and the ethylene is more than or equal to 1; and step (2) performing a blow molding process on the ethylene polymer prepared through the step (1) to obtain the polyethylene film. The method provided by the invention increases the self-adhesive property and decreases the haze of the obtained polyethylene film.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyethylene film, specifically, the present invention relates to a kind of preparation method of polyethylene film and its application. Background technique [0002] At present, biaxially oriented polypropylene film (BOPP) is the main product in the high-end packaging field because of its light weight, transparency, non-toxicity, moisture resistance and high mechanical strength. The new polyethylene biaxially oriented film (BOPE) shows more excellent performance than BOPP, with lighter weight, better transparency, gloss and printing effect. BOPE mainly has a 3-5 layer membrane structure, the most common is 3 layers, which are the outer base layer, the core base layer and the functional layer. The main component of the core layer is polyethylene (PE), and the addition of PE accounts for about 99% of the weight of the core layer. The tensile strength of the traditional polyethylene film ...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/14C08F4/645C08L23/08B32B27/08B32B27/32
CPCB32B27/08B32B27/32B32B27/327B32B2250/03B32B2250/242B32B2250/40B32B2307/518B32B2323/04C08F210/16C08J5/18C08J2323/08C08L23/0815C08F210/14C08F210/08C08F4/645
Inventor 管炳伟吴文清张洪波贾世敏孙洪霞崔宇辉阳永荣王靖岱陈美陈毓明胡晓波范小强韩国栋王晓丽王静魏文学张柯蒋斌波黄正梁王晓飞廖祖维
Owner CHINA PETROLEUM & CHEM CORP
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