Printable double-faced heat sealing film, preparation method and application thereof

A film and double-sided technology, applied in the field of film production and processing, can solve the problem that PE film cannot have both printability and double-sided heat sealability, and achieve good adhesion.

Inactive Publication Date: 2015-04-22
ZHEJIANG CHENGDE PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a printable double-sided heat-sealable film, its preparation method and its application, so as to solve the problem that the PE film used for single-layer packaging in the prior art cannot have both printability and double-sided heat-sealability. The problem

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  • Printable double-faced heat sealing film, preparation method and application thereof

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preparation example Construction

[0030] In addition, the present invention also provides a method for preparing a printable double-sided heat-sealing film, which includes the following steps: co-extruding and blow molding the raw materials of the outer layer, the middle layer and the inner layer. Specifically, the preparation process is as follows:

[0031] Step 1, mixing materials, respectively stirring the raw materials of the outer layer, the middle layer and the inner layer into a mixed material according to the consumption ratio of the raw materials of each layer;

[0032] Step 2, batching, batching according to the weight percentage between layers according to the compounding of each layer of the outer layer, the middle layer and the inner layer;

[0033] Step 3: Co-extrude the blown film, and use a blown film machine for blow molding to obtain the above-mentioned printable double-sided heat-sealable film.

[0034] The specific preparation process may include a mixing process, a feeding process, a plas...

Embodiment 1

[0038] (1) Ingredients:

[0039] Raw materials and weight percentages for the outer layer: 60% LLDPE-7042; 20% LDPE-2420H; and 20% MLLDPE-5100G;

[0040] Raw materials and weight percentages for the middle layer: 75% LLDPE-7042; 25% MDPE-2230;

[0041] Raw materials and weight percentages for the inner layer: 48% LLDPE-0220KJ; 24% LDPE-2426H; 24% MLLDPE-5100G; 2% anti-blocking agent EAZ-10; and 2% slip agent ESQ-4 ;

[0042] Among them, the raw materials for the outer layer, the raw materials for the middle layer and the raw materials for the inner layer account for 25%, 50% and 25% of the total mass of the raw materials respectively.

[0043] (2) Blow molding:

[0044] The above proportioned materials are processed in multi-layer co-extrusion blow molding equipment, including the following processes: mixing process, feeding process, plasticizing extrusion process, inflation traction process, air ring cooling process, herringbone splint process, traction Roller pulling pro...

Embodiment 2

[0046] (1) Ingredients:

[0047] Raw materials and weight percentages for the outer layer: 50% LLDPE-7042; 25% LDPE-2420H; and 25% SP1520;

[0048] Raw materials and weight percentages for the middle layer: 70% of 201XV; 30% of MDPE-2230;

[0049] Raw materials and weight percentages for the inner layer: 40% LLDPE-0220KJ; 30% 2426D; 27% SP1520; 2% anti-blocking agent EAZ-10; and 1% slip agent ESQ-4;

[0050] Among them, the raw materials for the outer layer, the raw materials for the middle layer and the raw materials for the inner layer account for 25%, 50% and 25% of the total mass of the raw materials respectively.

[0051] (2) Blow molding:

[0052] The above proportioned materials are processed in multi-layer co-extrusion blow molding equipment, including the following processes: mixing process, feeding process, plasticizing extrusion process, inflation traction process, air ring cooling process, herringbone splint process, traction Roller pulling process, corona treat...

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Abstract

The invention provides a printable double-faced heat sealing film, a preparation method and an application thereof. The film sequentially comprises an outer layer, a middle layer and an inner layer, wherein the outer layer comprises the following raw materials in percentage by weight: 50-70% of first linear low density polyethylene, 15-25% of first low density polyethylene and 15-25% of first metallocene linear low density polyethylene; the middle layer comprises the following raw materials in percentage by weight: 70-80% of second linear low density polyethylene and 20-30% of medium density polyethylene; the inner layer comprises the following raw materials in percentage by weight: 40-60% of third linear low density polyethylene, 18-30% of second low density polyethylene and 18-30% of second metallocene linear low density polyethylene. The film has good double-faced heat sealing property. Meanwhile, after the resin materials in the layers of the thin are reasonably matched, the film further has printability.

Description

technical field [0001] The invention relates to the field of film production and processing, in particular to a printable double-sided heat-sealable film, its preparation method and its application. Background technique [0002] Heat-sealing bags are widely used in daily chemical product packaging, food and drug packaging and other fields. Since leakage is most likely to occur at the heat-sealed part of the packaging bag when the product is filled, and the damage of the packaging bag also occurs in the heat-sealed part during actual use, therefore, choosing the appropriate heat-sealing film and heat-sealing parameters can reduce the scrap rate of the production line, And can effectively improve the overall barrier performance of the package. [0003] Currently commonly used heat-sealing films are polyethylene (PE) films or polypropylene (PP) films. The PP film used as a heat-sealing film is mainly a copolymerized polypropylene film formed by copolymerization of propylene a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C08L23/08C08L23/06B65D65/40B29C55/28B29L9/00
Inventor 王道德
Owner ZHEJIANG CHENGDE PACKAGING
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