Preparation method of anti-puncture high-barrier co-extrusion film
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A high-barrier, co-extruded film technology, applied in the field of packaging materials, can solve the problems of low puncture resistance, poor low temperature resistance, poor tensile resistance, etc. Effect of tear strength and impact strength
Pending Publication Date: 2020-07-17
DALIAN JUTONG PLASTIC PRODS
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[0014] The purpose of the present invention is to provide a preparation method of a puncture-resistant high-barrier functional co-extruded film, to solve the problems of low puncture resistance, poor stretch resistance, low temperature resistance and low temperature resistance of PE films and PP films in the prior art. It is prone to technical problems such as broken bags and poor sealing
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[0047] A method for preparing a puncture-resistant high-barrier co-extrusion film provided by an embodiment of the present invention includes the following steps:
[0048] Step 1: arranging the composite layer 1, the first core layer 2, the second core layer 3 and the heat-sealing layer 4 in sequence;
[0049] Step 2: Blow molding and co-extruding the composite layer 1, the first core layer 2, the second core layer 3 and the heat-sealing layer 4.
[0050] The preferred material of embodiment one of the present invention when preparing co-extruded film is as follows:
[0051] Metallocene polyethylene: melt index 0.5-1.0g / 10min, density 0.91-0.925g / cm 3 ; Metallocene polyethylene elastomer: melt index 0.75-1.25g / 10min, density 0.901-0.906g / cm 3 ;Polyamide resin: density 1.1-1.15g / cm 3; Compatible extrusion: polyethylene grafted maleic anhydride; low density polyethylene: melt index 0.25-1.0g / 10min, density 0.923-0.926g / cm 3 ;Linear low density polyethylene: melt index 1.0-2....
Embodiment 1
[0061] The process parameter description of embodiment one:
[0062] Please refer to Table 1 for the temperature setting range of the interlayer screw, such as figure 2 As shown, it mainly includes a first heating zone 5 , a second heating zone 6 , a third heating zone 7 , a fourth heating zone 8 , a fifth heating zone 9 , and a sixth heating zone 10 .
[0063] Table 1
[0064] between layers Zone 1 temperature ℃ Second zone temperature ℃ Three zone temperature ℃ Four zone temperature ℃ Five zone temperature ℃ Six zone temperature ℃ composite layer 165-170 170-180 180-200 180-200 180-185 180-185 first core layer 180-185 180-185 190-200 200-210 190-200 180-185 second core layer 195-200 220-230 230-240 230-240 200-210 200-210 heat seal layer 165-170 170-180 180-200 180-200 180-185 180-185
[0065] Please refer to Table 2 Blow Molding Machine Die Temperature Settings:
[0066] Table 2
[0067] Zon...
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Abstract
The invention provides a preparation method of a puncture-resistant high-barrier co-extrusion film, relates to the technical field of packaging materials, and solves the technical problems that a PE film and a PP film in the prior art are low in puncture resistance, poor in tensile resistance and low-temperature resistance and prone to bag breaking and poor sealing. The co-extrusion film comprisesa composite layer, a first core layer, a second core layer and a heat sealing layer, and the co-extrusion film is formed by blow molding and co-extrusion of the composite layer, the first core layer,the second core layer and the heat sealing layer which are sequentially arranged. The co-extrusion film provided by the invention integrates a series of mechanical properties such as puncture resistance, stretching resistance, impact resistance, tear resistance and the like, and in addition, on the premise of ensuring the mechanical properties, the processability of a product and the use performance of a client need to be met at the same time.
Description
technical field [0001] The invention relates to the technical field of packaging materials, in particular to a preparation method of a puncture-resistant high-barrier co-extrusion film. Background technique [0002] With the rapid rise of the soft package industry, there are higher standards for the quality of packaging materials, and traditional PE films and PP films are far from meeting the needs of special customers. [0003] The prior art has the following disadvantages: (mainly for the widely used PE film and PP film) [0004] 1. The anti-puncture performance is low, and the packaging methods such as vacuuming cause the contents to pierce the membrane material, resulting in air leakage and broken packages; [0005] 2. Low tensile performance, mainly for general heavy packaging and heavy packaging products; [0006] 3. Poor low temperature resistance. Under low temperature environment, the performance of ordinary PE film is greatly reduced, the film becomes brittle, an...
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