Three-layer coextrusion heavy packaging membrane and fabrication method thereof

A three-layer co-extrusion, packaging film technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of difficult to popularize and use, increase production cost of heavy packaging film, and difficult production process.

Active Publication Date: 2013-04-10
GUANGDONG SUNION CHEM & PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The FFS film used for heavy packaging uses a large amount of LDPE, which affects the overall strength of the film. At the same time, HDPE has strict requirements on equipment and requires the purchase of customized special equipment, which not only increases the production cost of heavy packaging film, but also has a difficult production process. promotional use

Method used

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  • Three-layer coextrusion heavy packaging membrane and fabrication method thereof
  • Three-layer coextrusion heavy packaging membrane and fabrication method thereof
  • Three-layer coextrusion heavy packaging membrane and fabrication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] A three-layer co-extruded heavy-duty packaging film, including an inner layer, a middle layer and an outer layer that are co-extruded sequentially, and the inner layer is composed of the following components by weight percentage:

[0115] Linear low density polyethylene 20~80%

[0116] Metallocene linear low density polyethylene 20~80%,

[0117] The middle layer is composed of the following components by weight percentage:

[0118] Linear low density polyethylene 20~50%

[0119] Metallocene linear low density polyethylene 20~50%

[0120] Ethylene-vinyl acetate copolymer 3~15%

[0121] Medium density polyethylene 20~50%

[0122] Masterbatch 3~10%,

[0123] The outer layer comprises the following components by weight percentage:

[0124] Linear low density polyethylene 15~60%

[0125] Metallocene linear low density polyethylene 20~60%

[0126] Low density polyethylene 15~40%.

[0127] The above-mentioned raw materials of this embodiment were all purchased from th...

Embodiment 2

[0155] The difference between a kind of three-layer co-extruded heavy packaging film of the present embodiment and embodiment 1 is that the components of the three-layer co-extruded heavy packaging film are as follows:

[0156] The inner layer is composed of the following components by weight percentage:

[0157] Linear low density polyethylene 40~60%

[0158] Metallocene linear low density polyethylene 40~60%,

[0159] The middle layer is composed of the following components by weight percentage:

[0160] Linear low density polyethylene 25~40%

[0161] Metallocene linear low density polyethylene 25~40%

[0162] Ethylene-vinyl acetate copolymer 5~10%

[0163] Medium density polyethylene 20~40%

[0164] Masterbatch 4~6%,

[0165] The outer layer is composed of the following components by weight percentage:

[0166] Linear low density polyethylene 20~40%

[0167] Metallocene linear low density polyethylene 30~50%

[0168] Low density polyethylene 15~25%

[0169] Antist...

Embodiment 3

[0174] The difference between a kind of three-layer co-extruded heavy packaging film of the present embodiment and embodiment 1 is that the components of the three-layer co-extruded heavy packaging film are as follows:

[0175] The inner layer is composed of the following components by weight percentage:

[0176] Linear Low Density Polyethylene 50%

[0177] Metallocene LLDPE 50%,

[0178] The middle layer is composed of the following components by weight percentage:

[0179] Linear Low Density Polyethylene 30%

[0180] Metallocene LLDPE 37%

[0181] Ethylene-vinyl acetate copolymer 3%

[0182] Medium Density Polyethylene 25%

[0183] Masterbatch 5%,

[0184] The outer layer is composed of the following components by weight percentage:

[0185] Linear Low Density Polyethylene 20%

[0186] Metallocene LLDPE 50%

[0187] LDPE 29%

[0188] Antistatic agent 1%.

[0189] Among them, the metallocene linear low-density polyethylene of the inner layer is selected from the 53...

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Abstract

The invention relates to the technical field of heavy packaging membranes, in particular to a three-layer coextrusion heavy packaging membrane and a fabrication method thereof. An inner layer of the three-layer coextrusion heavy packaging membrane contains LLDPE (linear low density polyethylene) and m-LLDPE (metallocene-linear low density polyethylene); a middle layer thereof contains m-LLDPE, LLDPE, MDPE (medium density polyethylene), EVA (ethylene-vinyl acetate) and a color masterbatch; and an outer layer thereof contains LLDPE, LDPE (low density polyethylene) and m-LLDPE. The fabrication method of the three-layer coextrusion heavy packaging membrane adopts the proportioning, and a product is fabricated on a certain technological condition. Compared with the prior art, the membrane has the characteristics that the membrane is excellent in mechanical property and good in deflexion; a skin-friction coefficient of the membrane is moderate; and a heat-seal window can reach 180 minus/plus 50 DEG C. The membrane can fully meet the requirement of normal use of downstream packaging, is particularly suitable for high-speed FFS (form-fill-seal) packaging, and has a good economic benefit and a social benefit.

Description

technical field [0001] The invention relates to the technical field of heavy packaging films, in particular to a three-layer co-extruded heavy packaging film and a preparation method thereof. Background technique [0002] In recent years, the FFS three-layer co-extrusion heavy packaging film industry has developed vigorously, and various heavy packaging films have emerged. In order to ensure that the heavy packaging film has high mechanical strength and heat sealing strength, the heavy packaging film is usually made of hexene or octene. Metallocene linear low density polyethylene resin (m-LLDP), hexene or octene copolymerized linear low density polyethylene resin (LLDPE), homopolymerized low density polyethylene resin (LDPE) and butene copolymerized high density Polyethylene resin (HDPE) mixed prepared. The existing heavy packaging film formula not only has many raw materials, but also the prepared heavy packaging film has unsatisfactory strength. It is also prepared by mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/18B32B27/32B65D65/40C08L23/08C08L23/06B29C47/06B29C47/92B29C48/08B29C48/92
CPCB29C48/92B29C2948/92704B29C48/08B29C48/911B29C48/914B29C2948/92514B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 郭彪王皓谭权张海涛
Owner GUANGDONG SUNION CHEM & PLASTIC
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