Method, product and tool for improving impact pressure resistance of plastic bag

Abstract

The invention discloses a method for improving the impact pressure resistance of a plastic bag. A heat seal line is of a shape characterized in that an oblique line is adopted between the knuckle lines and side lines of the plastic bag; a straight line is adopted between the knuckle lines; the transition section of the oblique line and the straight line adopts a convex curve to the upper side of the plastic bag; and the position of the convex curve corresponds to that of the knuckle line. The method has the following advantages: 1, the heat seal plastic bag can be tightly sealed because of adopting the special heat seal line shape, the stressed direction of the original straight line or curve heat seal is changed, therefore the impact pressure resistance of the sealed position is improved, and the phenomenon that the plastic bag has high possibility of breaking or leaking because of being impacted by materials during loading can be avoided, thereby preventing miscellaneous bacteria from being generated or protecting from air leakage, water leakage and the like; and 2, because one knife is provided with a plurality of heat seal blades, the production efficiency can be greatly improved, materials are saved, and the requirements of energy conservation and emission reduction are conformed.

Description

technical field [0001] The invention relates to the plastic processing industry, in particular to a plastic bag, and more specifically to an edible fungus cultivation bag and a heat-sealing knife for preparing the cultivation bag. Background technique [0002] The existing edible fungus cultivation bags generally use straight line heat sealing lines. Because the culture medium is often filled with mechanical means when using the cultivation bags, the cultivation bags have to bear relatively large impact pressure. Produce leak and tear, thereby can't use; In order to solve this problem, China's invention patent application, China State Intellectual Property Office accepted on March 21, 2003, published on October 15, 2003, application number is 03113961.2, application name is " A patent application document for a plastic bag with different heat-sealing line shapes” discloses an edible fungus cultivation bag that uses “a mean curved or arc-shaped sealing line”, because the cur...

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Problems solved by technology

[0002] The existing edible fungus cultivation bags generally use straight line heat sealing lines. Because the culture medium is often filled with mechanical means when using the cultivation bags, the cultivation bags have to bear relatively large impact pressure. Produce leak and tear, thereby can't use; In order to solve this problem, China's invention patent application, China State Intellectual Property Office accepted on March 21, 2003, published on October 15, 2003, application number is 03113961.2, application name is " A patent application document for a plastic bag with different heat-sealing line shapes” discloses an edible fungus cultivation bag that uses “a mean curved or arc-shaped sealing line”, because the curve or arc-shaped sealing line can be changed The direction of the force greatly improves the impact resistance of the seal; however, it is found in use that when subjected to greater pressure, for example, when a larger size is used to carry a heavier medium, since the cultivation bag is in the If the edge is folded first and then heat-sealed, it often breaks at the junction of the heat-sealing line and the folded edge

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