Multilayer coextrusion medical blister composite packaging film and preparation method thereof

A composite packaging film and multi-layer co-extrusion technology, which is applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of poor compounding of materials, great physical injury of operators, and reduction of physical and mechanical equipment. Performance and other issues, to achieve the effect of maintaining physical and mechanical properties, improving compatibility, and reducing production costs

Inactive Publication Date: 2011-10-26
FUZHOU GREEN SAIL PACKAGE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current medical blister packaging film is mostly three-layer, which is prepared by multi-layer co-extrusion, which is suitable for ethylene oxide (EO) disinfection (large investment and great harm to the operator), and its performance is not as good as steam disinfection (environmental protection) , small investment), α-ray disinfection (energy saving, environmental protection) requirements
At the same time, most of the current medical blister packaging films use polypropylene layers and linear polyethylene layers in the multi-layer co-extrusion preparation process, but the polypropylene layer and the linear polyethylene layer are high polymers that are not compatible with each other. The two materials cannot be well compounded, and separation will occur after compounding, so that the prepared multi-layer co-extruded medical blister packaging film will have two-phase separation during the process of blistering, reducing its physical and mechanical properties

Method used

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  • Multilayer coextrusion medical blister composite packaging film and preparation method thereof

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preparation example Construction

[0047] In the present invention, the preparation method of the multi-layer co-extruded medical blister composite packaging film comprises the following steps:

[0048]1) Extrusion: The raw materials of each layer are sent to three or five extruders of a three-layer or five-layer co-extrusion blown film unit to be heated and melted into a polymer melt, and then passed through each flow channel of the spiral center die. The layer components are laminated on the upper part of the die to form a co-extruded film; the three-layer or five-layer co-extrusion blown film units all use a single-screw extruder with a screw length-diameter ratio of 32:1. The body temperature of the machine is 160~240℃, the die temperature is 190~240℃, and the screw speed is 15~50 rpm;

[0049] 2) Blown film: When the polymer melt flows out of the die, it is made by one-time inflation of a three-layer or five-layer co-extrusion blowing film unit, and then stretched into a film, and the inflation ratio is 1:...

Embodiment 1

[0058] Three-layer co-extrusion machine to produce 0.10mm thick co-extruded film:

[0059] 1) Extrusion: the outer layer raw material mixes low density polyethylene with linear polyethylene (by mass ratio 1:1); the middle layer raw material mixes linear low density polyethylene with linear polyethylene metallocene polyethylene (by mass ratio 2 : 1 mixed); the inner layer raw material is polypropylene. The three raw materials are extruded into the extruder, heated, plasticized, melted and extruded, and then entered into the three-layer die head in the center of the spiral. Three-layer raw material temperature range: the body temperature of the outer extruder is 160℃~200℃, the body temperature of the middle layer extruder is 170℃~200℃, the body temperature of the inner layer extruder is 180℃~210℃, and the temperature of the die head It is 190℃~210℃. The screw speed is: 30 rpm for the outer layer, 40 rpm for the middle layer, and 45 rpm for the inner layer.

[0060] 2) Blown f...

Embodiment 2

[0064] Three-layer co-extrusion machine to produce 0.12mm thick co-extruded film:

[0065] 1) Extrusion: The outer layer raw material is mixed with low density polyethylene and linear polyethylene (mixed by mass ratio 8:1); the middle layer raw material is mixed with linear low density polyethylene and linear polyethylene metallocene polyethylene (by mass ratio of 10 : 1 mixed); the inner layer raw material is polypropylene. The three raw materials are extruded into the extruder, heated, plasticized, melted and extruded, and then entered into the three-layer die head in the center of the spiral. Three-layer raw material temperature range: the temperature of the outer extruder body is 170℃~200℃, the temperature of the middle layer extruder body is 180℃~200℃, the temperature of the inner layer extruder body is 180℃~210℃, and the temperature of the die head It is 200℃~210℃. The screw speed is: 35 rpm for the outer layer, 50 rpm for the middle layer, and 40 rpm for the inner lay...

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Abstract

The invention discloses a multilayer coextrusion medical blister composite packaging film which comprises an inner film, a middle film and an outer film; each layer from outside comprises the following components in parts by mass: 20-30 parts of outer layer made from copolymer of low-density polyethylene and linear low-density polyethylene, 20-40 parts of middle layer made from polymer of the liner low-density polyethylene and low-density metallocene polyethylene, and 30-50 parts of inner layer made from polypropylene. The product is obtained by extruding, film-blowing, air-cooling, water-cooling shaping, surface processing and winding. The multilayer coextrusion medical blister composite packaging film is safe, sanitary, transparent and airtight, has good elongation and varieties respectively suitable for three sterilizing forms, the blister forming is realized in the packaging process. The layers of the product have good compatibility, and cannot be separated from each other when performing the blister forming; and therefore, the physical mechanical property is maintained.

Description

technical field [0001] The invention relates to a multi-layer co-extruded packaging film and a preparation method thereof, in particular to a multi-layer co-extruded medical blister composite packaging film for packaging medical instruments and a preparation method thereof. Background technique [0002] Medical blister packaging film is mainly used for the packaging of paper-plastic easy-to-tear, plastic-plastic easy-to-tear medical equipment supplies in a disposable pre-formed sterile system. Its varieties are suitable for gas sterilization (ethylene oxide EO disinfection), radiation Sterilization methods such as photo sterilization (alpha ray sterilization) and steam sterilization (steam sterilization). Because medical blister packaging film is a special blister film provided for automatic blister packaging machine, it has good mechanical and physical properties, can be heat-sealed with medical dialysis paper, and does not produce paper scraps when torn; The medical blist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/34B32B7/12B29C49/04B29C47/92B29C48/92
CPCB29C48/0017B29C48/10
Inventor 黄健林友菁林柏文张海军
Owner FUZHOU GREEN SAIL PACKAGE MATERIAL
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