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Agricultural polyethylene resin composition

A technology of polyethylene resin and composition, which is applied in the field of modified linear low-density polyethylene resin composition, can solve the problems of affecting performance, many fish eyes in the film, and large amount of organic peroxide, so as to reduce the amount of use, The effect of reducing production costs

Active Publication Date: 2009-09-23
PETROCHINA CO LTD
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AI Technical Summary

Problems solved by technology

However, a problem with this composition is that the amount of organic peroxide used is large, which not only increases the production cost, but also tends to produce too much gel in the process of processing, resulting in more fish eyes in the film and affecting its performance.

Method used

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  • Agricultural polyethylene resin composition

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Embodiment Construction

[0007] Using the Φ34 twin-screw extruder produced by Germany Lestreiz Company as the reactor, LLDPE resin, peroxide and antioxidant are mixed evenly in a high mixer, and then extruded and granulated to obtain modified LLDPE resin. See Table 1 and Table 2 for the specific raw material formula and basic physical properties of modified LLDPE.

[0008] DFDA7042: product of Lanzhou Petrochemical Company, density 0.918g / cm 3 , melt flow rate 2.0g / 10min;

[0009] LL101AA: product of Lanzhou Petrochemical Company, density 0.918g / cm 3 , melt flow rate 1.0g / 10min;

[0010] Antioxidant: Composite antioxidant B561, product of Yingkou Fengguang Chemical Co., Ltd.;

[0011] Organic peroxides: di-tert-butyl peroxide (DTBP), tert-butyl hydroperoxide (TBHP) and benzoyl peroxide (BPO) are all products of Lanzhou Auxiliary Factory.

[0012] Table 1 raw material formula

[0013]

Numbering

base resin

DTBP+TBHP

/ ppm

DTBP to TBHP mass ratio...

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PUM

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Abstract

The invention discloses an agricultural polyethylene resin composition. The composition mainly consists of linear low-density polyethylene LLDPE and organic peroxide, wherein the organic peroxide is combined by di-tert-butyl peroxide DTBP and tert-butyl hydroperoxide TBHP according to the combination ratio of between 1:1 and 6:1, and the consumption of the organic peroxide is between 500 and 2,500ppm (based on each gram of linear low-density polyethylene). In the composition, the linear low-density polyethylene LLDPE is cross-linked by compounding the peroxide, and when the obtained modified high-bath strength LLDPE resin is used for blowing a 80 mum agricultural green house membrane, and under the condition of ensuring the membrane blowing stability and the quality of the membrane, the consumption of the peroxide is lowered, so that the production cost is also lowered.

Description

technical field [0001] The invention relates to an agricultural polyethylene resin composition, in particular to a modified linear low-density polyethylene (LLDPE) resin composition. Background technique [0002] Linear low-density polyethylene (LLDPE) is a new type of polyethylene developed in the late 1970s. Compared with high-pressure polyethylene (LDPE), it has less investment in production equipment, low production costs, and is superior in mechanical strength, elongation, and environmental resistance. Many aspects of stress cracking, puncture resistance and tear resistance are superior to the latter. Therefore, in the past 30 years, LLDPE has developed rapidly and has penetrated into almost all traditional markets of polyethylene (PE), including films, pipes, wires and cables, hollow products and large containers. However, due to the low melt strength of LLDPE itself and the high stretchability, the stability of the film bubble is poor in the blown film forming proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/14A01G9/22
CPCY02A40/25
Inventor 魏福庆许惠芳王卓妮刘义陈基堂竺栋荣邓守军李朋朋段宏义殷茜乔彤森张庆国
Owner PETROCHINA CO LTD
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