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A kind of stand-up pouch and its composite film
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A composite film and stand-up pouch technology, applied in the direction of synthetic resin layered products, laminated, layered products, etc., can solve the problem of "PE melting out, etc., and achieve good stiffness, good mechanical properties, and excellent heat-sealing performance Effect
Active Publication Date: 2017-04-12
河北永新包装有限公司
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Problems solved by technology
[0005] In view of this, the present invention provides a polyethylene film, which has good heat-sealing performance, solves the problem of "PE melt-out" at the existing heat-sealing part, thereby improving the resistance of the stand-up pouch made from it. Pressure performance and drop resistance
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Embodiment 1
[0029] Example 1, preparing PE film.
[0030] Add composite layer resin raw materials, intermediate layer resin raw materials and heat-sealing layer resin raw materials to the three barrels of the co-extrusionmachine respectively. The formula of each resin raw material is as follows:
[0031] Composite layer: 70wt% m-LLDPE and 30wt% LDPE.
[0033] Heat-sealing layer: 33wt% of LDPE, 65wt% of reinforced polyethylene resin, 0.7wt% of slippery agent and 1.3wt% of opening agent.
[0034] The polymer particles in the above three barrels are melted by the extruder to form a tube blank. After the tube blank is stretched, compressed air is blown out from the center of the die head of the extruder to blow the tube blank into a bubble-like film. The shaped film is cooled and shaped by the air ring cooling air to obtain a PE film.
Embodiment 2
[0035] Example 2, preparing PE film.
[0036] The formula of each resin raw material is as follows: Composite layer: 60wt% m-LLDPE and 40wt% LDPE.
[0038] Heat-sealing layer: 34.2wt% of LDPE, 63wt% of reinforced polyethylene resin, 0.8wt% of slippery agent and 2.0wt% of opening agent. All the other are with embodiment 1.
Embodiment 3
[0039] Example 3, preparing PE film.
[0040] The formula of each resin raw material is as follows: Composite layer: 66.7wt% m-LLDPE and 33.3wt% LDPE.
[0042] Heat-sealing layer: 32.43wt% LDPE, 64.85wt% reinforced polyethylene resin, 0.78wt% slip agent and 1.94wt% anti-opening agent. All the other are with embodiment 1.
[0043] The PE films prepared in Examples 1-3 were tested for their heat-sealing properties and mechanical properties, and the test results are shown in Table 1.
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Abstract
The invention discloses a polyethylene film. The polyethylene film comprises a composite layer, a middle layer and a heat sealing layer which are sequentially overlapped. The composite layer comprises 60-70wt% of metallocenepolyethylene and 30-40wt% of low-density polyethylene; the middle layer comprises 30-35wt% of high-density polyethylene, 30-35wt% of linear low-density polyethylene and 30-35wt% of low-density polyethylene; the heat sealing layer comprises 33-35% of low-density polyethylene, 63-65% of reinforcing polyethylene resin, 0.5-0.8wt% of slipping agent and 1.3-2.0wt% of anti-blocking agent. A melting point of the composite layer is higher than that of the middle layer, and the melting point of the middle layer is higher than that of the heat sealing layer. The invention further provides a composite film and a self-supporting bag which are prepared through the polyethylene film. By the adoption of the PE film, PE melting of the heat sealing portion can be effectively avoided, the heat sealing performance of the PE film is greatly improved, and the polyethylene film has excellent adaptation, pressure resistance and falling resistance and meets the requirement of actual production.
Description
technical field [0001] The invention relates to the field of packaging of edible products, in particular to a polyethylene film, a composite film of a stand-up pouch with a welding spout and a stand-up pouch with a welding spout product. Background technique [0002] In recent years, the fast-moving consumerfood industry is gradually rising, and its demand is increasing day by day. More and more consumers have higher and higher requirements for the functional packaging of fast-moving consumer goods. As one of many fast-moving packaging bags, the stand-up pouch has always been loved by consumers due to its unique bag shape. At the same time, many flexible packaging manufacturers will complain about the complexity of the stand-up pouch product process. [0003] Compared with other packaging products, the stand-up pouch is composed of two parts: the spout and the bag body. Its production mainly includes four processes: printing, compounding, bag making, and spout ironing. Esp...
Claims
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