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High-barrier tape stretch film and production method thereof

A production method and high-barrier technology, applied in the field of food packaging materials, can solve problems such as damage, air leakage, tear resistance, and poor puncture resistance

Pending Publication Date: 2021-07-06
FOSHAN NANHAI LIDA PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing food packaging materials are mainly made of polyethylene, polyester and other materials, which have poor tear resistance and puncture resistance. In the case of food with sharp edges and corners (such as chicken wings, chicken feet, etc.), and In a high or low temperature environment, the above food packaging materials will be damaged and leak air, so a packaging with the advantages of easy processing, good biocompatibility, high / low temperature resistance, good barrier properties, good ductility, and high puncture resistance is required Material

Method used

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  • High-barrier tape stretch film and production method thereof
  • High-barrier tape stretch film and production method thereof
  • High-barrier tape stretch film and production method thereof

Examples

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Embodiment 1

[0071] see Figure 1 to Figure 2 , a high-barrier stretched film of the present embodiment, comprising stacked A material layer 1, B material layer 2, H material layer 3, F material layer 7 and G material layer 8; the high-barrier stretched film is generally The thickness is 10-200μm;

[0072] A material layer 1 contains at least PA or modified PA;

[0073] The B material layer 2 includes at least an adhesive;

[0074] The H material layer 3 contains at least EVOH;

[0075] The F material layer 7 at least includes an adhesive;

[0076] The G material layer 8 contains at least one material among LDPE, LLDE and mPE.

[0077] When the high-barrier stretch film of the present invention is applied to food packaging, the G material layer 8 is in direct contact with the food, and the G material layer 8 has good low-temperature heat-sealing performance, and can wrap and seal the food at a relatively low temperature.

[0078] Preferably, the H material layer 3 includes a stacked C...

Embodiment 2

[0123] Another object of the present invention is to provide a method for producing the above-mentioned stretched film with high barrier tape, comprising the following steps;

[0124] (1) Add the raw materials required for A material layer, B material layer, C material layer, D material layer, E material layer, F material layer and G material layer into No. 1 to No. 7 smooth barrel extrusion mechanisms;

[0125] (2) No. 1 to No. 7 smooth barrel extrusion mechanisms are respectively extruded to form seven single-layer bodies;

[0126](3) The seven single-layer bodies share a low-mode spiral mandrel seven-layer co-extrusion die head, and the seven single-layer bodies of the die head are formed into one body through the die head.

[0127] Preferably, in step (2), the following steps are included:

[0128] (2.1) Use an automatic weighing and precise quantitative device to put different raw materials into different hoppers in proportion to fully mix and stir;

[0129] (2.2) The r...

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Abstract

The invention provides a high-barrier tape stretch film. The high-barrier tape stretch film comprises an A material layer, a B material layer, a C material layer, a D material layer, an E material layer, an F material layer and a G material layer which are stacked, the total thickness of the high-barrier tape stretch film is 10-200 microns; the A material layer at least comprises PA or modified PA; the material layer B at least comprises an adhesive; the C material layer at least comprises PA or modified PA; the D material layer at least comprises EVOH; the E material layer at least comprises PA or modified PA; the F material layer at least comprises an adhesive; the G material layer comprises at least one material of LDPE (Low-Density Polyethylene), LLDE (Linear Low-Density Polyethylene) and mPE; and the seven layers of materials are integrally formed. The invention also provides a production method of the high-barrier tape stretch film. The high-barrier tape stretch film disclosed by the invention is low in cost, good in barrier property, high in tensile strength and good in puncture resistance; and according to the production method disclosed by the invention, multiple layers of materials are integrated into a whole by utilizing the co-extrusion die head, so that a well-layered multi-layer structure is formed.

Description

technical field [0001] The invention relates to the field of food packaging materials, in particular to a high-barrier stretch film and a production method thereof. Background technique [0002] With the development of society, food safety has become a topic that people pay more and more attention to, and packaging materials play an extremely important role in ensuring the quality of food. , Shelf life of foods such as nuts. However, different foods have different requirements for the barrier properties of packaging materials, and in order to adapt to different packaging situations and different shapes of food materials, packaging materials must also have good mechanical properties, including tensile strength, tear resistance, impact strength etc. Existing food packaging materials are mainly made of polyethylene, polyester and other materials, which have poor tear resistance and puncture resistance. In the case of food with sharp edges and corners (such as chicken wings, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B32B7/12B32B27/08B32B27/30B32B27/32B65D65/40B29C48/08B29C48/21B29C48/49
CPCB32B27/34B32B7/12B32B27/08B32B27/306B32B27/32B32B27/06B65D65/40B29C48/08B29C48/21B29C48/49B32B2307/31B32B2307/554B32B2307/54B32B2307/558B32B2307/50B32B2553/00
Inventor 钟健常
Owner FOSHAN NANHAI LIDA PACKAGING