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Green recyclable co-extruded packaging film and preparation method thereof

A packaging film, green technology, applied in the field of packaging film, can solve problems such as difficult to recycle and reuse, achieve good barrier effect and reduce cost

Inactive Publication Date: 2015-07-29
JINHU COUNTY HENGXIANG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Furthermore, the cost of five-layer and seven-layer co-extruded films is several times that of ordinary composite films, so many packaging materials are rejected; and five-layer and seven-layer co-extruded films are generally difficult to recycle and reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1. The present invention includes the following layered structure, the inner layer is: LDPE / MLLDPE, the middle layer is: MLLDPE / PP, and the outer layer is: PP.

[0031] The inner layer of the present invention is LDPE / MLDPE blending structure as the heat-sealing layer. The preferred solution is: 20% LDPE, 80% MLLDPE blending, and the middle layer is MLLDPE / PP blending structure as the barrier layer. The preferred solution is: 20% MLLDPE, 80% %PP, the outer layer is PP, and the preferred solution is 100% PP, wherein: the PP in the middle layer is preferably a copolymerized polypropylene resin; the PP in the outer layer is preferably a block copolymerized polypropylene resin. The thickness of each layer of the cross-section of the packaging film of the present invention is: 15 μm, 30 μm-90 μm and 30 μm-90 μm from outside to inside.

[0032] Preparation technical parameter of the present invention is as follows:

[0033] The equipment model is: M3B-2300QA, manu...

Embodiment 2

[0058] The present invention includes the following layered structure, the inner layer is: LDPE / LLDPE / MLLDPE, the middle layer is: MLLDPE / LLDPE / PP, and the outer layer is: PP.

[0059] The inner layer of the present invention is LDPE / LLDPE / MLLDPE blending structure as the heat-sealing layer. The preferred solution is: 15% LDPE, 15% LLDPE, 70% MLLDPE blending; the middle layer is MLLDPE / LLDPE / PP blending structure as the barrier layer, preferably The scheme is:

[0060] 10% MLLDPE, 10% LLDPE, 80% PP, the outer layer is PP, the preferred solution is 100% PP. The thickness of each layer of the packaging film section of the present invention is from outside to inside:

[0061] 10μm, 55μm, 20μm.

[0062] The technical parameter of preparation of the present invention is with reference to example 1.

Embodiment 3

[0064] The present invention includes the following layered structure, the inner layer is: LDPE / MLLDPE, the middle layer is MLLDPE / PP, and the outer layer is: PP.

[0065] The inner layer of the present invention is LDPE / MLDPE blending structure as the heat-sealing layer. The preferred solution is: 40% LDPE, 60% MLLDPE blending; the middle layer is MLLDPE / PP blending structure as the barrier layer, the preferred solution is: 20% MLLDPE, 80% %PP, the outer layer is PP, and the preferred solution is 100%PP. The thickness of each layer of the packaging film section of the present invention is from the outside to the inside:

[0066] 15μm / 30μm-90μm / 20μm-90μm.

[0067] The technical parameter of preparation of the present invention is with reference to example 1.

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Abstract

The invention provides a green recyclable co-extruded packaging film and a preparation method thereof. The green recyclable co-extruded packaging film adopts the layered structure that an inner layer serves as a heat-seal layer consisting of LDPE and MLLDPE which are co-mixed, an intermediate layer serves as an obstructing layer consisting of MLLDPE and PP which are co-mixed, and a printing layer is arranged outside the intermediate layer and made from PP. As a nontoxic environment-friendly material serves as the raw material, MLLDPE replaces a toxic adhesive, and the compatibility of MLLDPE and LDPE, as well as MLLDPE and PP, is fully utilized, the packaging film has no residual solvent and has relatively good effects in obstructing oxygen and water vapor. The packaging film is recyclable and regenerative, and the recovery rate can reach 95% or above. The green recyclable co-extruded packaging film is environment-friendly, energy-saving and emission-reducing, lowers the cost, is safe and sanitary and is a green packaging film product which can protect the human mental and physical health.

Description

technical field [0001] The invention relates to a packaging film manufactured by using PE and PP as raw materials and a preparation method thereof, and is especially suitable for being used as a packaging film for food, daily necessities and clothing. Background technique [0002] The invention provides a non-toxic and environment-friendly packaging film technology, which is suitable for the packaging of general daily necessities and is also suitable for the field of food packaging with high requirements. The cost of the film is low; the main index of the packaging film is to have a low oxygen transmission rate and water vapor transmission rate. At present, the food packaging barrier film on the market is mainly manufactured by the following two technologies. One is made of nylon film, BOPP, PET and PE, CPP composite film; the second is five-layer, seven-layer co-extrusion film. [0003] Nylon, BOPP, PET and PE, CPP composite films must first be bonded and composited. The p...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B37/00B32B27/30B65D65/40
CPCY02W30/80
Inventor 张金祥
Owner JINHU COUNTY HENGXIANG PLASTIC
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