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High-intensity low-gramweight embossing casting film and manufacture method thereof

A high-strength, cast film technology, applied in chemical instruments and methods, flexible coverings, packaging, etc., can solve the problems of easy generation of wrinkles and poor mechanical strength of low-gram weight cast films, and achieve mechanical strength. Poor, good feel, good strength effect

Active Publication Date: 2009-04-29
SHANGHAI ZIHUA FILM TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength and low-grammage embossed cast film. The high-strength and low-grammage embossed cast film should solve the problem of poor mechanical strength of the low-grammage cast film in the prior art, Technical problems that are prone to wrinkles

Method used

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  • High-intensity low-gramweight embossing casting film and manufacture method thereof

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Embodiment Construction

[0015] Such as figure 1 As shown, the high-strength low-grammage embossed cast film of the present invention is composed of a first flexible outer layer 1 and a second flexible outer layer 2, wherein the first flexible outer layer 1 and the second flexible outer layer A rigid supporting layer 3 is arranged between the layers 2, and the first flexible outer layer 1 and the second flexible outer layer 2 are attached and connected to the rigid supporting layer 3 respectively.

[0016] Further, the thickness of the rigid support layer 3 is equal to 1.3 to 18 times the thickness of the first flexible outer layer 1 or the second flexible outer layer 2 .

[0017] Further, the thickness of the first flexible outer layer 1 is equal to the thickness of the second flexible outer layer 2 .

[0018] Further, the first flexible outer layer 1 and the second flexible outer layer 2 are made of low-density polyethylene fusion film, or linear low-density polyethylene fusion film, or metallocene...

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Abstract

An embossing and casting film with high intensity and low gram weight consists of a first flexible outer layer and a second flexible outer layer; wherein, a rigid bracing layer is arranged between the first flexible outer layer and the second flexible outer layer, and is respectively connected with the first flexible outer layer and the second flexible outer layer in an attaching way. The thickness of the rigid bracing layer is 1.3-1.8 times of that of the first flexible outer layer or the second flexible outer layer. The method for manufacturing the embossing and casting film with high intensity and low gram weight comprises the steps that a three-layer co-extrusion casting machine is used for extruding polyethylene material according to the structure of the first flexible outer layer-the rigid bracing layer-the second flexible outer layer. The invention promotes the intensity and the tenacity of the casting film with low gram weight by utilizing the flexible outer layers, provides good hand feeling, enhances the effects of heat seal and printing with other materials, and improves the stiffness and the rigidity of the casting film with low gram weight by utilizing the rigid bracing layer. Therefore, the technical problems of poor mechanical intensity and easiness producing of crease of the casting film with low gram weight in the prior art are solved.

Description

Technical field: [0001] The invention relates to packaging technology, in particular to a packaging film, in particular to a film for packaging and carrying sanitary napkins or panty liners, in particular to a high-strength, low-gram-weight embossed cast film and a manufacturing method thereof. Background technique: [0002] Sanitary napkins or panty liners use cast film as the packaging layer. In the prior art, in order to reduce the cost of materials, cast films with low grammage are widely used, so as to greatly increase the unit use area of ​​materials. However, there are defects in the cast film with low grammage. After the grammage is reduced, the mechanical properties and modulus will decrease, especially in the production process, holes will easily occur. When used as a base film for hygiene materials, it has poor temperature resistance, low stiffness, and is prone to wrinkles. Invention content: [0003] The purpose of the present invention is to provide a high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/00B32B27/32B65D65/40B29C47/06B29C47/40B29K23/00
Inventor 郭长华董仁金冯炳耀
Owner SHANGHAI ZIHUA FILM TECH CO LTD
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