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Medical three-layer coextrusion polypropylene thin film and preparation method thereof

A polypropylene film and three-layer co-extrusion technology, which is applied in chemical instruments and methods, applications, household appliances, etc., can solve problems such as tearing and delamination, and achieve the effect of improving product quality

Inactive Publication Date: 2017-11-17
ANQING KANGMINGNA PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when making heat-sealed bags, ziplock bags, and roll bags, it is easy to delaminate and tear when peeling off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Outer layer: polypropylene T3OS 40 parts;

[0017] Middle layer: 20 parts of polypropylene T3OS;

[0018] Inner layer: 15 parts of polypropylene, 1 part of heat-sealable anti-sticking masterbatch, 1 part of polypropylene 0723, 6 parts of metallocene polyethylene, 7042 2-parts of low-density polyethylene, 48 parts of polypropylene 800e.

[0019] Take the above raw materials through mixing, melt extrusion, casting, longitudinal stretching, transverse stretching, traction trimming, winding, and then slitting the finished product. The extrusion temperature during extrusion is 190℃ and the die temperature is 248 ℃, the quench roll and water tank temperature during the casting process are both 32℃; the longitudinal preheating temperature is 116℃, the longitudinal stretching temperature is 126℃, the longitudinal setting temperature is 140℃, and the longitudinal stretching ratio is 4.9 times; During the stretching process, the transverse preheating temperature is 166°C, the transvers...

Embodiment 2

[0021] Outer layer: polypropylene T3OS 50 parts;

[0022] Middle layer: 25 parts of polypropylene T3OS;

[0023] Inner layer: 18 parts of polypropylene, 2 parts of heat-sealing anti-adhesive masterbatch, 12 parts of polypropylene 0723, 8 parts of metallocene polyethylene, 7042 parts of low density polyethylene, 50 parts of polypropylene 800e.

[0024] Take the above raw materials through mixing, melt extrusion, casting, longitudinal stretching, transverse stretching, traction trimming, winding, and then slitting the finished product. The extrusion temperature during extrusion is 220 ℃, and the die temperature is 248 ℃, the quench roll and water tank temperature during the casting process are both 32℃; the longitudinal preheating temperature is 120℃, the longitudinal stretching temperature is 130℃, the longitudinal setting temperature is 140℃, and the longitudinal stretching ratio is 4.9 times; During the stretching process, the transverse preheating temperature is 170°C, the transve...

Embodiment 3

[0026] Outer layer: 55 parts of polypropylene T3OS;

[0027] Middle layer composition: 30 parts of polypropylene T3OS;

[0028] Inner layer: 20 parts of polypropylene, 3 parts of heat-sealable anti-sticking masterbatch, 15 parts of polypropylene 0723, 10 parts of metallocene polyethylene, 7042 parts of low density polyethylene, 52 parts of polypropylene 800e.

[0029] Take the above raw materials through mixing, melt extrusion, casting, longitudinal stretching, transverse stretching, traction trimming, winding, and then slitting the finished product. The extrusion temperature during extrusion is 260℃, and the die temperature is 248 ℃, the quench roll and water tank temperature during the casting process are both 32℃; the longitudinal preheating temperature is 142℃, the longitudinal stretching temperature is 135℃, the longitudinal setting temperature is 140℃, and the longitudinal stretching ratio is 4.9 times; During the stretching process, the transverse preheating temperature is 17...

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Abstract

The invention discloses a medical three-layer coextrusion polypropylene thin film. The thin film comprises an inner layer, a middle layer and an outer layer, and the outer layer is prepared from 40-55 parts of polypropylene T3OS; the middle layer is prepared from 20-30 parts of polypropylene T3OS; the inner layer is prepared from 15-20 parts of polypropylene, 1-3 parts of heat-sealing anti-sticking master batches, 10-15 parts of polypropylene 0723, 6-10 parts of metallocene polyethylene, 2-5 parts of low-density polyethylene 7042 and 48-52 parts of polypropylene 800e. The invention further discloses a preparation method of the medical three-layer coextrusion polypropylene thin film. Through the reasonable design of a formula, when the thin film is subjected to a pressure steam sterilization test at 135 DEG C for 60 minutes, no adhesion phenomenon occurs; when the thin film is adopted to produce heat-sealing bags, zip-lock bags, rolling bags and three-dimensional rolling bags, no layering and tearing phenomenon occurs during stripping; meanwhile, other physical properties of the thin film are greatly improved.

Description

Technical field [0001] The invention relates to the field of film processing, in particular to a medical three-layer co-extruded polypropylene film for medical sterilization packaging products and a preparation method thereof. Background technique [0002] With the development of my country's medical industry, medical films have become increasingly demanding. At present, the medical sterilization packaging CPP produced in the domestic market is undergoing pressure steam sterilization (135 degrees). After 30 minutes, the medical sterilization packaging CPP appears to be stuck. Therefore, when making heat-sealed bags, ziplock bags, and roll bags, delamination and tearing are likely to occur during peeling. Summary of the invention [0003] The purpose of the present invention is to provide a three-layer co-extruded polypropylene film for medical use. When the film is subjected to a pressure steam sterilization test, there is no adhesion phenomenon at 60 minutes and 135 degrees; the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08B32B27/18C08L23/12C08L23/06B65D65/40
CPCB32B27/32B32B27/08B32B27/18B32B2307/738B32B2439/80B65D65/40C08L23/12C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L2207/066C08L23/06
Inventor 龙其成吴新华杨小帅许团胜
Owner ANQING KANGMINGNA PACKAGING
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