Manufacturing process of high-barrier high-strength four-layer compound packing bag

Abstract

A manufacturing process of a high-barrier high-strength four-layer compound packing bag comprises the steps of printing, compounding, curing, slitting and bag-making, and particularly comprises the following steps: (1) on the basis of a traditional compound technology, a compound configuration glue is adjusted, dual-component polyurethane glue is used, and 20% of a curing agent is additionally added during glue mixing to enhance the compounding strength; and stirring is performed for 20 min by a stirrer, and standing is performed for 30 min to bring convenience for air foam in the glue to overflow, local pinholes or bubbles, which influence the strength of the packing bag, are avoided; (2) glue injection, feeding, inside and outside examination of raw material corona parts are performed according to normal operation programs in the compounding process, BOP is more than or equal to 50 dyne, PE is more than or equal to 42 dyne, the control tensions of all parts are adjusted, a 110 line gluing rail is used, and the gluing quantity is controlled to be 3.5 g / m<2> to ensure sufficient stripping strength; and (3) the PET / AL speed during compounding of a first layer is smaller than 60 m / min, and the temperatures of four areas of a drying oven is controlled to be 60 DEG C, 70 DEG C, 80 DEG C and 85 DEG C.

Description

technical field [0001] The invention relates to a manufacturing process of a packaging bag, in particular to a manufacturing process of a high-barrier and high-strength four-layer composite packaging bag. Background technique [0002] In production, many products need to be packaged in packaging bags to facilitate storage, moving and transportation, etc., especially for granular and powdery materials, packaging bags are needed for packaging. However, in the actual storage, moving or transportation, sometimes due to carelessness, the packaging bag will drop and break the packaging bag, or due to the limited strength of the packaging bag, the number of stacked layers is limited, it should not be too high, even in the When filling materials into the packaging bag, because the filling speed is too fast, the packaging bag will be broken directly, which affects the safe and smooth production. Contents of the invention [0003] The purpose of the present invention is to provide ...

AI Technical Summary

Problems solved by technology

However, in actual storage, moving or transportation, sometimes due to carelessness, the packaging bag will drop and break the packaging bag, or due to the limited strength of the packaging bag, the number of stacked layers is limited and should not be too high, even in When filling materials into the packaging bag, because the filling speed is too fast, the packaging bag will be directly broken, which affects the safe and smooth production