In order to make the package easy to open, most of the packages on the market are equipped with easy tear openings. The influencing factors of the tearing performance of the serrated easy-tear opening set in the hawthorn slice packaging bag
are analyzed as follows: the incision depth and angle of the serrated easy-tear opening, of which the incision depth is the main factor. On the basis of a certain cutting angle, the smaller the cutting depth, the greater the tear strength of the composite packaging bag. If the cutting depth is too small, the packaging bag will be difficult to tear, and the function of easy tearing will be lost. When setting the easy tearing opening of the package, the appropriate cutting depth should be set. Composite fastness and composite uniformity of packaging bags
. If the composite film has poor composite fastness and low peel strength, it is easy to delaminate under the action of tearing force, and each single-layer film will be stretched to different degrees under the pulling of tearing force. On the one hand, the phenomenon of stretching and tearing increases the tearing force, and at the same time, it also affects consumers to eat the hawthorn slices in the package. If the peel strength of the composite film is not uniform, such a phenomenon of delamination of the package during tearing occurs easily at a portion with a low peel strength, and extends along the tear portion.
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