Polyethylene (PE) film and preparation method thereof

A polyethylene film and polyethylene technology, which is applied in the field of washing product packaging, can solve the problems of easy bag breakage, low tensile strength, easy liquid leakage, etc., to achieve good environmental protection, high tensile strength, and ensure leakage prevention. The effect of resistance and drop resistance

Active Publication Date: 2011-09-14
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing composite film for washing liquid packaging can effectively increase the capacity / volume of the packaging, it has poor adhesion and low tensile strength after being heat-sealed, which leads to easy leakage of washing liquid products after a period of use , easy to break the package after falling

Method used

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  • Polyethylene (PE) film and preparation method thereof
  • Polyethylene (PE) film and preparation method thereof
  • Polyethylene (PE) film and preparation method thereof

Examples

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preparation example Construction

[0035] Correspondingly, the present invention provides a method for preparing the aforementioned PE film, comprising: co-extruding and blow molding the raw materials of the aforementioned composite layer, intermediate layer and heat-sealing layer at 120°C to 160°C.

[0036] In the present invention, the composite layer resin, the intermediate layer resin and the heat-sealing layer resin are preferably respectively added to the three barrels of the extruder, and each barrel is heated in three stages. ℃, the heating temperature of the second stage is 130℃~140℃, the heating temperature of the third stage is 140℃~150℃, the temperature of the die head is set at 140℃~160℃, and the extrusion melt pressure is controlled to be less than 45Mpa. The polymer particles in the above three barrels are melted by the extruder to form a tube blank. After the tube blank is stretched, compressed air is blown out from the center of the die head of the extruder to blow the tube blank into a bubble-l...

Embodiment 1

[0049] Embodiment 1 prepares PE film

[0050] Add composite layer resin raw materials, intermediate layer resin raw materials and heat-sealing layer resin raw materials to the three barrels of the co-extrusion machine respectively. The formula of each resin raw material is as follows:

[0051] Composite layer: 32wt% LDPE, 32wt% LLDPE and 36wt% modified m-LLDPE;

[0052] Middle layer: 30wt% LDPE, 60wt% LLDPE and 10wt% white masterbatch;

[0053] Heat seal layer: 31wt% LDPE and 69wt% LLDPE.

[0054] The polymer particles in the above three barrels are melted by the extruder to form a tube blank. After the tube blank is stretched, compressed air is blown out from the center of the die head of the extruder to blow the tube blank into a bubble-like film. The shaped film was cooled and shaped by the air ring cooling air to obtain a PE film. The process parameters of the extruder equipment are shown in Table 1.

Embodiment 2

[0055] Embodiment 2 prepares PE film

[0056] The difference between this embodiment and Example 1 lies in the resin raw materials of the composite layer, the middle layer and the heat-sealing layer. The resin raw material formulations of each layer of this embodiment are as follows:

[0057] Composite layer: 28wt% LDPE, 29wt% LLDPE and 43wt% modified m-LLDPE;

[0058] Middle layer: 26wt% LDPE, 58wt% LLDPE and 16wt% white masterbatch;

[0059] Heat seal layer: 35wt% LDPE and 65wt% LLDPE.

[0060] Setting extruder equipment process parameter is identical with embodiment 1.

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Abstract

The invention provides a polyethylene (PE) film and a preparation method thereof. The PE film sequentially comprises a composite layer, an intermediate layer and a heat-seal layer, wherein the composite layer comprises 25 to 40 weight percent of low-density PE, 25 to 40 weight percent of linear low-density PE and 33 to 45 weight percent of modified metallocene linear low-density PE; the intermediate layer comprises 25 to 50 weight percent of the low-density PE and 50 to 75 weight percent of the linear low-density PE; and the heat-seal layer comprises 28 to 35 weight percent of the low-density PE and 65 to 72 weight percent of the linear low-density PE. The invention also provides a cleaning solution packaging composite film and a cleaning solution packaging bag, wherein the cleaning solution packaging composite film is prepared from the PE film. Correspondingly, the invention also provides a preparation method of the cleaning solution packaging composite film which is prepared from the PE film. A product is packaged by the PE film provided by the invention, so the packaging bag has certain solvent resistance and excellent heat-seal performance, the relatively high sealing property and tensile strength of a material subjected to heat sealing are guaranteed, and the leakage resistance and falling resistance of the composite film which is prepared by the material are further improved.

Description

technical field [0001] The invention relates to the field of washing product packaging, in particular to a polyethylene film and a preparation method thereof, a washing liquid packaging composite film and a preparation method thereof, and a washing liquid packaging bag. Background technique [0002] In recent years, as people pay more and more attention to health and hygiene, the types of washing liquids have not been short-changed, and the demand is also increasing. Washing supplies have become a must-have for people's lives. Compared with solid washing liquid products, washing liquid has good water solubility, does not need artificial dissolution, and is more convenient to use, especially suitable for frequent washing needs of urban people. However, due to the high fluidity and certain chemical corrosion of the washing liquid, the washing liquid must be packaged before entering the market for sale. [0003] Compared with the packaging of other products, washing liquid pac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B65D65/40
Inventor 鲍祖本潘健谢文汇江浪浪
Owner HUANGSHAN NOVEL
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