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PE stretch film material and preparation method thereof

A technology of wrapping film and raw materials, applied in the field of packaging, can solve the problems of lack of quality, low tensile strength and elongation at break of PE wrapping film, etc., to improve quality, reduce loss, improve elongation at break and tensile strength. The effect of tensile strength

Inactive Publication Date: 2015-07-22
SUZHOU DINGLI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of plastic bag made from this special polymer has better properties than traditional bags due to its high molecular weight (MW) component called polygalactone acid or galactose). It also increases flexibility without losing it over time when used with certain chemicals like acids that can damage these materials during storage.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the durability and performance of stretches films during various applications such as package wrapping materials, medical devices, electronics, building construction material, etc., while reducing costs associated with their production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) By weight, take 40 parts of PE, 6 parts of PVC, 5 parts of acetyl tri-n-butyl citrate, 9 parts of polypropylene carbonate, 2.4 parts of di-octyl phthalate, algae Propylene glycol acid ester is 7.5 parts, diisopropyl phosphite is 2.5 parts, and macrogol glyceryl laurate is 4 parts, and above-mentioned raw material is dropped in the high-speed mixer, mixes evenly;

[0045] (2) Extrude the raw materials uniformly mixed in step (1) with a twin-screw extruder at high temperature. During twin-screw extrusion, the length-to-diameter ratio of the screw is 35:1. The extrusion temperature of the twin-screw extruder is: the first zone The temperature is 176°C, the temperature in the second zone is 180°C, the temperature in the third zone is 200°C, and the temperature in the fourth zone is 224°C;

[0046] (3) After extrusion, cast the mixture into a film with a casting machine, the casting temperature is 205°C, and cool after casting;

[0047] (4) Pack after cooling, and prepa...

Embodiment 2

[0049] (1) By weight, 70 parts of PE, 14 parts of PVC, 2 parts of acetyl tri-n-butyl citrate, 5 parts of polypropylene carbonate, 3.6 parts of di-octyl phthalate, algae Propylene glycol acid ester is 3.5 parts, diisopropyl phosphite is 5 parts, and macrogol glyceryl laurate is 1.5 parts, and above-mentioned raw material is dropped in the high-speed mixer, mixes evenly;

[0050] (2) Extrude the uniformly mixed raw materials in step (1) with a twin-screw extruder at high temperature. The length-to-diameter ratio of the twin-screw extruder is 25:1, and the extrusion temperature of the twin-screw extruder is: the first zone The temperature is 170°C, the temperature in the second zone is 192°C, the temperature in the third zone is 208°C, and the temperature in the fourth zone is 210°C;

[0051] (3) After extrusion, cast the mixed material into a film with a casting machine, the casting temperature is 220°C, and cool after casting;

[0052] (4) Pack after cooling, and prepare as PE...

Embodiment 3

[0054] (1) By weight, 50 parts of PE, 13 parts of PVC, 3 parts of acetyl tri-n-butyl citrate, 8 parts of polypropylene carbonate, 2.8 parts of di-octyl phthalate, algae Propylene glycol acid ester is 4.5 parts, diisopropyl phosphite is 4.5 parts, macrogol glyceryl laurate is 2.5 parts, and above-mentioned raw material is dropped in the high-speed mixer, mixes evenly;

[0055] (2) Extrude the raw materials uniformly mixed in step (1) with a twin-screw extruder at high temperature. During twin-screw extrusion, the length-to-diameter ratio of the screw is 35:1. The extrusion temperature of the twin-screw extruder is: the first zone The temperature is 176°C, the temperature in the second zone is 180°C, the temperature in the third zone is 200°C, and the temperature in the fourth zone is 224°C;

[0056] (3) After extrusion, cast the mixture into a film with a casting machine, the casting temperature is 205°C, and cool after casting;

[0057] (4) Pack after cooling, and prepare as ...

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Abstract

The invention belongs to the field of packing materials, and relates to a PE stretch film material and a preparation method thereof. The PE stretch film material is prepared from the following constituents: 40-70 parts of PE, 6-14 parts of PVC, 2-5 parts of acetyl tri-n-butyl citrate, 5-9 parts of polypropylene carbonate, 2.4-3.6 parts of dicapryl phthalate, 3.5-7.5 parts of propylene glycol alginate, 2.5-5 parts of diisopropyl phosphite and polyethylene glycol glycerol laurate. The preparation method comprises the following steps: (1) respectively taking the raw materials and feeding the raw materials into a high-speed mixer to be mixed uniformly; (2) using a twin-screw extruder to squeeze the uniformly mixed raw materials in the step (1) at high temperature; (3) using a casting machine to cast the squeezed mixed materials to form a film, keeping the casting temperature to be 205-220 DEG C, and cooling after casting; (4) packaging after cooling, so as to obtain the PE stretch film material.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Owner SUZHOU DINGLI PACKAGING
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