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A thin packaging film with high tensile properties and its preparation method

A technology of stretchability and packaging film, which is applied in the field of thin packaging film with high stretchability and its preparation, can solve the problems of increased difference in stretchability, decrease of stretch ratio, deterioration of tensile strength, etc., and achieves a good combination Strong force, guaranteed stretching effect, simple operation effect

Active Publication Date: 2021-08-24
NINGBO HONGYAN PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as the above-mentioned packaging film is concerned, after the overall thickness is reduced according to the thickness ratio of its components, the difference in tensile properties between the layers increases, and the outer film layer deforms and breaks first during the re-stretching process, further deteriorating the tensile strength , the packaging film is broken, and the stretching ratio is greatly reduced, which cannot meet the demand. Therefore, a thinner and high-stretching packaging film that maintains the original packaging tension is needed.

Method used

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  • A thin packaging film with high tensile properties and its preparation method
  • A thin packaging film with high tensile properties and its preparation method
  • A thin packaging film with high tensile properties and its preparation method

Examples

Experimental program
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Effect test

Embodiment Embodiment 1

[0077] A thin package film having a high tensile performance is a seven-layer composite film, and the seven-layer composite film has a thickness of 10 to 12 μm, and the seven-layer composite film begins from the cross section from the cross section to the other side including the first layer, the second layer, The third layer, the fourth layer, the fifth layer, sixth and seventh layers;

[0078] The raw materials of the first layer and the seventh layer include components of the following mass:

[0079] Metal metal linear low density polyethylene 60 ~ 70 parts;

[0080] 3 to 5 copies of PP elastomers;

[0081] 10 to 15 low density polyethylene;

[0082] 0.8 ~ 1.2 parts of oleic acid amide;

[0083] The second layer and the sixth layer of raw materials include components of the following mass:

[0084] Metal metal linear low density polyethylene 65 ~ 75 parts;

[0085] PP elastomer 8 ~ 12 copies;

[0086] 10 to 15 low density polyethylene;

[0087] 1.5 ~ 3 parts of the tannolin com...

Embodiment 7

[0130] Thin packaging film of high tensile properties, based on Example 3, in the case of the second layer / sixth layer of raw material components and the first layer / seventh layer raw material component.

[0131] The surface of the package film obtained in Example 7 had a variable-resistant deformation, and the thickness was different, and the tensile breaking ratio was 140%, the tensile strength (the stretch was 120%) was 38 MPa.

[0132] Comparative Examples 7 and Example 3 can be seen that the second layer and sixth layer are mixed into the single-linthol compound, the maleic anhydride, the first layer, and the seventh layer are protected against the second layer and sixth layer. , Reduce the deformation caused by temperature difference during the cooling process after the extrusion, prevent the packaging film deformation.

Embodiment 8

[0134] A thin packaging film of high tensile properties, based on Example 3, the difference is that the amount of nanoscale tin oxide in the second layer / sixth layer is zero.

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Abstract

The invention relates to a packaging film, discloses a thin packaging film with high tensile properties and a preparation method thereof, which solves the problem that the stretching ratio of the existing packaging film is greatly reduced after being thinned. Film, the thickness of the seven-layer composite film is 10~12μm, and the seven-layer composite film includes the first layer, the second layer, the third layer, the fourth layer, the fifth layer, and the sixth layer from one side to the other side from the cross section. layer and the seventh layer, the seven-layer film layer is based on metallocene linear low-density polyethylene, and maleic anhydride and tannin phenolic compounds are mixed into the second and sixth layers to improve the performance of the second and sixth layers. The bonding force with the corresponding film layers on both sides improves the toughness of the film layers so that the first layer and the seventh layer outside the second layer and the sixth layer, the third layer and the fifth layer between the second layer and the sixth layer , The change difference during the stretching process on both sides of the sixth layer is eased, and the delamination and breakage of the packaging film is delayed, and then the original stretching ratio and tension are maintained on the basis of making a thin packaging film.

Description

Technical field [0001] The present invention relates to a packaging film, and more particularly to a thin packaging film having high tensile properties and a preparation method thereof. Background technique [0002] Plastic film soft packaging is an existing package that uses a long strip-shaped plastic packaging film to wrap the pre-packaged object. Due to its packaging film, the packaging film used is required to have good tensile properties and tensile strength to ensure that the packaged film is tightened to package the pre-packaged object. [0003] The existing packaging film includes a multi-layer extruded metallocene polyethylene pack, which has a wide range of environmentally non-toxic and toughness. For example, the company developed by the company, China's patent "a highly anti-pulling film and production method", which discloses a high-tensile film, a seven-layer composite film, from the film cross section starts from the outside to the outside include: [0004] The fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/18B32B27/06B32B27/08B32B33/00B65D65/40B29C48/18B29D7/01
CPCB29D7/01B32B27/08B32B27/18B32B27/32B32B27/327B32B33/00B32B2250/05B32B2250/242B32B2307/54B32B2307/558B32B2323/046B32B2553/00B65D65/40B29C48/18
Inventor 李辉
Owner NINGBO HONGYAN PACKING MATERIAL