A kind of preparation method of PE composite packaging film and use of product thereof
A technology of composite packaging film and production method, which is applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of packaging bag product leakage, packaging bag is easy to crack, etc., and achieve the effect of avoiding loss
Active Publication Date: 2020-10-30
GOLDEN TECH PRINTING CO LTD ANHUI PROVINCE
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Problems solved by technology
[0002] In the actual production and the customer's later feedback, the company found that the soft packaging material is made of CPP. Although the hardness is good, when it is applied to some packaging that requires low-temperature freezing products, the packaging bag is easy to be brittle after low-temperature freezing, resulting in cracks in the packaging bag. product leak
Method used
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Embodiment 1
[0017] S1: Mix LLDPE and MLLDPE according to the above ratio, and heat to flow plastic;
[0018] S2: Mix LLDPE, MLLDPE and two HDPEs with different melt flow rates according to the above ratio, and heat to flow plastic;
[0019] S3: Mix LDPE, LLDPE, MLLDPE and two kinds of HDPE with different melt flow rates according to the above ratio, and heat to flow plastic, wherein the temperature is 200 degrees Celsius;
[0020] S4: Connect the flow-plastic mixture in S1, S2, and S3 with the extruder of the three-layer co-extrusion blown film machine to blow the film to form a three-in-one new material. The extrusion blown film machine can ensure that the mixture in S1, the mixture in S2 and the mixture in S3 have high heat sealing efficiency and good heat sealing effect, avoid material deformation and prolong the service life of the material.
[0021] The inspection data is as follows:
[0022] Referring to the standard QB / 10004-2008, test the low temperature resistance of two packag...
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Abstract
The invention discloses a manufacturing method for a PE composite packaging film. The PE composite packaging film comprises an outer layer, a middle layer and an inner layer, wherein the outer layer is formed by mixing LLDPE and MLLDPE in certain proportion; the middle layer is formed by mixing LLDPE, MLLDPE and two HDPEs with different melt flowing rates in certain proportion; and the inner layeris formed by mixing LDPE, LLDPE, MLLDPE and two HDPES with different melt flowing rates in certain proportion. A new material formed by upward-blowing through three-layer co-extrusion film blowing equipment keeps stiffness of CPP, also can be resistant to low-temperature freezing better in comparison with CPP, is compounded with other materials to form a composite material, so that the blocking requirements can be achieved, the new material also can be enabled to reach certain stiffness requirements, and the problem that CPP is not resistant to low temperature freezing is solved, and therefore, an application prospect is wide.
Description
technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for making a PE composite packaging film and an application of the product. Background technique [0002] In the actual production and the customer's later feedback, the company found that the soft packaging material is made of CPP. Although the hardness is good, when it is applied to some packaging that requires low-temperature freezing products, the packaging bag is easy to be brittle after low-temperature freezing, resulting in cracks in the packaging bag. Product leaks. Contents of the invention [0003] The technical problem to be solved by the invention is that the packaging bag can ensure sufficient hardness and be used in a low temperature environment. [0004] In order to solve the above technical problems, the technical solution of the present invention is a method for making a PE composite packaging film, which is characterized in that it includ...
Claims
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IPC IPC(8): B65D65/22B65D65/02B29C48/10B29C48/18
CPCB65D65/02B65D65/22B65D2565/381B29C48/10B29C48/18
Inventor 何琼叶政理
Owner GOLDEN TECH PRINTING CO LTD ANHUI PROVINCE