Recyclable polyethylene single-material high-barrier film bag and processing technology thereof

A processing technology and high-barrier technology, which is applied in the field of polyethylene single-material high-barrier membrane bags and their processing technology, can solve the problem that moisture barrier properties, oxygen barrier properties and aroma retention properties cannot meet the requirements of high-quality products, multi-layer co-extrusion equipment The problems of high cost and high content of non-polyethylene components can reduce sorting costs, improve processability and transparency, and achieve good quality of recycled products.

Pending Publication Date: 2022-03-25
河北上东包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing PE single-material film bags use PE/PE material structure, and the two layers of PE are ordinary polyethylene resin, which cannot meet the requirements of high-quality products in terms of moisture resistance, oxygen resistance and fragrance retention
If a multi-layer co-extruded high-barrier PE material structure is used, because the high-barrier materials are mostly EVOH, PA, PVDC and other materials, it needs to reach a certain thickness (≥3μm) to have sufficient barrier properties, and the above materials are compatible with PE materials The property is not good, and it is necessary to add connecting res

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]This embodiment prepares a recyclable polyethylene single material high-barrier film bag, including a printing layer PE film and a heat-sealing layer PE film, and the surface of the heat-sealing layer PE film is coated with an improved PVA coating liquid, and the PVA coating liquid It is located on the surface of the PE film of the heat-sealing layer and the PE film of the printing layer. The PE film of the printing layer and the PE film of the heat-sealing layer are combined by dry compound glue and then cut into bags to obtain recyclable polyethylene single-material high-barrier film bags.

[0045] The printing layer PE film includes the outer layer of the printing layer, the middle layer of the printing layer and the inner layer of the printing layer;

[0046] Among them, the outer layer of the printing layer includes 20% LDPE, 20% LLDPE, 59% mLLDPE and 1% additives;

[0047] The middle layer of the printing layer includes 50% HDPE, 10% LLDPE, and 40% mLLDPE;

[0048...

Embodiment 2

[0067] This embodiment prepares a recyclable polyethylene single material high-barrier film bag, including a printing layer PE film and a heat-sealing layer PE film, and the surface of the heat-sealing layer PE film is coated with an improved PVA coating liquid, and the PVA coating liquid It is located on the surface of the PE film of the heat-sealing layer and the PE film of the printing layer. The PE film of the printing layer and the PE film of the heat-sealing layer are combined by dry compound glue and then cut into bags to obtain recyclable polyethylene single-material high-barrier film bags.

[0068] The printing layer PE film includes the outer layer of the printing layer, the middle layer of the printing layer and the inner layer of the printing layer;

[0069] Among them, the outer layer of the printing layer includes 29% LDPE, 30% LLDPE, 40% mLLDPE and 1% additives;

[0070] The middle layer of the printing layer includes 60% HDPE, 20% LLDPE, and 20% mLLDPE;

[007...

Embodiment 3

[0090] This embodiment prepares a recyclable polyethylene single material high-barrier film bag, including a printing layer PE film and a heat-sealing layer PE film, and the surface of the heat-sealing layer PE film is coated with an improved PVA coating liquid, and the PVA coating liquid It is located on the surface of the PE film of the heat-sealing layer and the PE film of the printing layer. The PE film of the printing layer and the PE film of the heat-sealing layer are combined by dry compound glue and then cut into bags to obtain recyclable polyethylene single-material high-barrier film bags.

[0091] The printing layer PE film includes the outer layer of the printing layer, the middle layer of the printing layer and the inner layer of the printing layer;

[0092] Among them, the outer layer of the printing layer includes 25% LDPE, 25% LLDPE, 49% mLLDPE and 1% additives;

[0093] The middle layer of the printing layer includes 55% HDPE, 15% LLDPE, and 30% mLLDPE;

[009...

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PUM

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Abstract

The invention relates to the technical field of plastic flexible packaging, in particular to a recyclable polyethylene single-material high-barrier film bag and a processing technology thereof, the high-barrier bag is easy to process, low in rejection rate, low in non-polyethylene content and good in barrier property and fragrance retention, and equipment used in the processing technology of the high-barrier bag is simple and low in cost. The high-barrier film bag is low in film manufacturing cost, easy to process and high in yield, the high-barrier film bag comprises a printing layer PE film and a heat-sealing layer PE film, the surface of the heat-sealing layer PE film is coated with improved PVA coating liquid, the PVA coating liquid is located on the surfaces of the heat-sealing layer PE film and the printing layer PE film, the printing layer PE film and the heat-sealing layer PE film are compounded through dry compound glue and then cut to manufacture the bag, and the high-barrier film bag is formed. The processing technology of the recyclable polyethylene single-material high-barrier film bag comprises the following steps: S1, preparing a film; s2, PVA (Polyvinyl Alcohol) coating; s3, printing the film cloth; s4, compounding; and S5, bag making.

Description

technical field [0001] The invention relates to the technical field of plastic flexible packaging, in particular to a recyclable polyethylene single-material high-barrier film bag and its processing technology. Background technique [0002] Existing PE single-material film bags mostly use PE / PE material structure, and the two layers of PE are ordinary polyethylene resin, which cannot meet the requirements of high-quality products in terms of moisture resistance, oxygen resistance and fragrance retention. If a multi-layer co-extruded high-barrier PE material structure is used, because the high-barrier materials are mostly EVOH, PA, PVDC and other materials, it needs to reach a certain thickness (≥3μm) to have sufficient barrier properties, and the above materials are compatible with PE materials The performance is not good, and it is necessary to add a connecting resin (≥4μm) during processing, so it is bound to cause a high content of non-polyethylene components in the multi...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/18B32B27/06B32B33/00B32B7/12B32B37/12B32B37/15B32B38/14B65D65/42B65D65/40B31B70/00B31B70/74B31B70/88B31B70/62
CPCB32B27/32B32B27/18B32B27/08B32B33/00B32B7/12B32B37/12B32B37/153B32B38/145B65D65/42B65D65/40B31B70/00B31B70/74B31B70/79B31B70/88B31B70/62B32B2307/7246B32B2307/7244B32B2307/554B32B2307/416B32B2272/00B32B2255/10B32B2255/26B32B2439/06Y02W30/80
Inventor 王灿军于生哲
Owner 河北上东包装科技有限公司
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