PE blown film, PE composite film, packaging bag and preparation method of packaging bag

Abstract

The invention relates to the technical field of sealing packaging materials, in particular to a PE blown film, a PE composite film prepared from the PE blown film, a double-volume intercommunicable flexible packaging bag prepared from the PE composite film, and a method for preparing the packaging bag. The intercommunicable flexible packaging bag includes the main body of the packaging bag and a destructible partition. The main material of the packaging bag is PE composite film, and the material of the destructible partition is a piece of PE strip sandwiched between the opposite packaging main body; PB and PE are incompatible Two phases, but under the action of heating, melting and shear stress, they have good mutual dispersion. Therefore, after PB and PE are blended into a film, that is, PE strip, it can achieve a good fusion seal with PE composite film. Under this condition, the incompatible phases of PB and PE in the PE strips are completely separated, with slight peeling deformation, but not obvious tensile deformation, so that they can be separated cleanly. The destructible partition has excellent sealing performance, the heat sealing strength is controllable and stable, and the bag making operation is simple.

Description

technical field [0001] The invention relates to the technical field of sealing packaging materials, in particular to a PE blown film, a PE composite film prepared from the PE blown film, a double-volume intercommunicable flexible packaging bag prepared from the PE composite film, and a method for preparing the packaging bag. Background technique [0002] There are some mixture products with different water content, such as solid-liquid mixed products, dried fruit and nuts with different water content. In order to extend the shelf life of its mixed products or maintain their original flavors, traditional packaging adopts the method of mixed packaging plus desiccant or separate packaging; and the way of mixed packaging plus desiccant is likely to cause moisture in the contents of wet ingredients The content of the dry ingredients absorbs water, which eventually leads to the mixture being easily deteriorated and moldy, and the shelf life is reduced; the contents are packaged in...

AI Technical Summary

Problems solved by technology

At present, this double-chamber one-piece packaging technology is to bond the middle partition area with a virtual seal (reduce the heat-sealing temperature of the heat-sealing ironing strip in the partition area and reduce the heat-sealing pressure) when making the bag, but This kind of bonding will decrease with the passage of time and the movement of polymer chains, especially when the ambient temperature rises, this virtual sealed isolation area will automatically separate; this virtual sealed bag-making operation control is also It is very difficult, especially when the thickness of the composite film material is uneven, there may be insufficient virtual seal (the composite film is too thin), that is, the contents are intercommunicated when filling, or the virtual seal is too large (when the composite film is too thick) , that is, it is difficult for end consumers to uncover the separation area, and the two volumes cannot communicate with each other

Images