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Completely recoverable barrier PE membrane material as well as preparation method and application thereof

A technology of barrier property and film material, applied in the field of organic packaging film materials, can solve the problems of poor barrier property of pure PE film material, inability to effectively protect the contents, and rapid film leakage, and achieve good transparency, good printing adaptability, and economical efficiency. The effect of resources

Pending Publication Date: 2022-08-05
GUANGDONG FORETURE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, pure PE film products can be reused after recycling, and have a wide range of applications, but the existing pure PE film materials have poor barrier properties, and the oxygen transmission rate (OTR) is between 2000 and 10000cm 3 / m 2 .day, water permeability (WVTR) in the range of 1~10g / m 2 .day; when used for cushioning packaging and other products, due to the high air permeability, the film leaks quickly after inflation, the air retention time is short, the storage time is short, the packaging is easily damaged during transportation, and the contents cannot be effectively protected

Method used

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  • Completely recoverable barrier PE membrane material as well as preparation method and application thereof
  • Completely recoverable barrier PE membrane material as well as preparation method and application thereof
  • Completely recoverable barrier PE membrane material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0070] such as figure 1 The fully recyclable barrier PE film material of the present invention as shown comprises seven superimposed film layer structures, the substrates of each film layer in the film layer structure are polyethylene polymer materials (PE), and the film layer structure It contains three-layer HDPE functional layer with high-density polyethylene polymer material as the base material.

[0071] The structure of the barrier PE film of this embodiment is shown in Table 1, and includes a seven-layer structure of mLLDPE / HDPE / mLLDPE / HDPE / mLLDPE / HDPE / mLLDPE, wherein the HDPE functional layer and the non-HDPE in the film layer structure The functional layers (ie, mLLDPE functional layers) are alternately stacked, and each non-HDPE functional layer is based on a metallocene linear low density polyethylene material as a base material. The most central film layer of the film structure is the HDPE functional layer, and the HDPE functional layers and the non-HDPE functiona...

Embodiment 2

[0091] such as Figure 7 The fully recyclable barrier PE film material of the present invention as shown comprises seven superimposed film layer structures, the substrates of each film layer in the film layer structure are polyethylene polymer materials (PE), and the film layer structure It contains three-layer HDPE functional layer with high-density polyethylene polymer material as the base material.

[0092] The structure of the barrier PE film of this embodiment is shown in Table 2, and includes a seven-layer structure of mLLDPE / HDPE / mLLDPE / HDPE / mLLDPE / HDPE / mLLDPE, wherein the HDPE functional layer and the non-HDPE in the film layer structure The functional layers (ie, mLLDPE functional layers) are alternately stacked, and each non-HDPE functional layer is based on a metallocene linear low density polyethylene material as a base material. The most central film layer of the film structure is the HDPE functional layer, and the HDPE functional layers and the non-HDPE function...

Embodiment 3

[0100] such as Figure 8 The fully recyclable barrier PE film material of the present invention as shown comprises seven superimposed film layer structures, the substrates of each film layer in the film layer structure are polyethylene polymer materials (PE), and the film layer structure It contains two layers of HDPE functional layer with high-density polyethylene polymer material as the base material.

[0101] The structure of the barrier PE film of this embodiment is specifically shown in Table 3, including a seven-layer structure of mLLDPE / HDPE / mLLDPE / LLDPE / mLLDPE / HDPE / mLLDPE (which can also be mLLDPE / mLLDPE / HDPE / LLDPE / HDPE / mLLDPE / mLLDPE), wherein the HDPE functional layer and the non-HDPE functional layer (ie mLLDPE functional layer) in the film structure are not completely alternately stacked. The most central membrane layer of the membrane structure is the LLDPE functional layer, which is arranged symmetrically on both sides of the most central membrane layer in an al...

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Abstract

The invention discloses a completely recoverable barrier PE (polyethylene) membrane material, which comprises three or more than five layers of mutually overlapped membrane layer structures, the base material of each membrane layer is a PE material, and the membrane layer structure at least comprises one HDPE (high-density polyethylene) functional layer taking a high-density polyethylene polymer material as a base material. The preparation method of the membrane material comprises the following steps: feeding, heating and melting, co-extruding, blowing, cooling and shaping, drawing, rolling and the like. In the film blowing cooling shaping stage, all film layers are obtained through one-time film blowing forming, and a film material stretching and extending operation is additionally carried out in the traction process; the number of the extruders is more than five, and the number of the extruders is correspondingly consistent with the number of layers of a membrane material to be prepared; the number of the runners in the die head of the film blowing machine is more than five, and the number of the runners is consistent with the number of layers of a film material to be prepared. The membrane material can be applied to packaging materials or buffer bag materials for various industries. The product provided by the invention has the advantages of environmental protection, good mechanical property, good barrier property, low cost, excellent comprehensive performance and the like.

Description

technical field [0001] The invention relates to an organic packaging film material and its application, and belongs to the technical field of polymer materials. Background technique [0002] In the existing nylon co-extruded film, the recycling grade of the film product will be reduced due to the nylon content, and the cost of the nylon co-extruded film is high. [0003] Existing HDPE films have low dart impact strength, high haze, easy tearing, and low film barrier properties, which limit the application range of HDPE films. [0004] The existing EVOH co-extruded film will also reduce the recycling grade of the film product due to the EVOH content, and the EVOH co-extruded film cost is higher. [0005] At present, there are also a small amount of all-plastic composite packaging materials using the more advanced blow molding EVOH (ethylene-vinyl alcohol copolymer) co-extrusion film technology route. There are two main processes in this technical route. In addition, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B65D65/40B29D7/01
CPCB32B27/32B32B27/327B32B27/08B65D65/40B29D7/01B32B2307/7265B32B2307/406B32B2307/412B32B2307/558B32B2307/7242
Inventor 汤亮胡翔宇
Owner GUANGDONG FORETURE NEW MATERIAL CO LTD
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