Medical super-tough puncture-resistant high-barrier composite film and preparation method thereof

A composite film and puncture-resistant technology, which is applied to chemical instruments and methods, applications, flat products, etc., can solve the problems of puncture resistance, high barrier, low crystallinity, easy delamination, etc., and achieve controllable thickness, low cost, and easy Forming effect

Active Publication Date: 2019-07-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core layer uses a multi-layer laminated structure of a high-melting point crystalline polyester and a crystalline polyamide resin, which solves the film properties of puncture resistance and high barrier; the inner surface layer uses a low-melting point amorphous polyester, which has good Exce

Method used

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  • Medical super-tough puncture-resistant high-barrier composite film and preparation method thereof
  • Medical super-tough puncture-resistant high-barrier composite film and preparation method thereof

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preparation example Construction

[0031] As introduced in the background technology, there is a certain difference in the adhesion between the layers of the current non-PVC multi-layer co-extrusion film, and the separation between the layers is easy to occur during the film preparation process, so it is difficult to control The preparation of this kind of multi-layer co-extrusion film and obtain the problem of the product of high film yield. Therefore, the present invention proposes a kind of preparation method of medical puncture resistance, high barrier composite film, described method comprises:

[0032] S1. Select spherical silica or calcium carbonate powder with a particle size ranging from 0.1 to 2.0 μm, and use organic wax for organic treatment for 1 to 3 hours;

[0033]S2. Combine step S1. Silica powder after organic treatment with terephthalic acid (PTA), 1,6-naphthalene dicarboxylic acid, isophthalic acid (IPA), and ethylene glycol in a weight ratio of 0.1 to 1 : 10 ~ 50: 5 ~ 15: 10 ~ 30: 30 ~ 65 ra...

Embodiment 1

[0065] Spherical silica powders with particle sizes ranging from 0.1 to 1.0 μm were respectively selected, and organically treated with hard partially saponified montan wax for 1.5 hours;

[0066] The organically treated silica powder and terephthalic acid (PTA), 1,6-naphthalene dicarboxylic acid, isophthalic acid (IPA), and ethylene glycol are in a weight ratio of 0.5:30:10.6:15: Mix at a ratio of 44, add 200ppm ethylene glycol antimony as a catalyst, and 300ppm tributyl phosphate as a stabilizer to carry out esterification reaction. The esterification temperature is 240-265°C, and the esterification time is 3h. After that, under a vacuum of 20Pa, The polycondensation reaction was carried out at 278-300°C for 3.5h to obtain a low-crystallinity copolyester with an intrinsic viscosity of 0.68dl / g and a melting point of 220°C; the outer layer of the film;

[0067] The organically treated silica powder was mixed with terephthalic acid (PTA), isophthalic acid (IPA), 2-methyl-1,3-...

Embodiment 2

[0073] Spherical silica powders with a particle size ranging from 0.5 to 1.0 μm were respectively selected, and organically treated with ultra-low molecular weight polyethylene wax for 2.5 hours;

[0074] The organically treated silica powder and terephthalic acid (PTA), 1,6-naphthalene dicarboxylic acid, isophthalic acid (IPA), and ethylene glycol are in a weight ratio of 0.5:26:9.5:19: Mix at a ratio of 45, add 250ppm antimony trioxide as a catalyst, and 350ppm trimethyl phosphate as a stabilizer for esterification reaction. The esterification temperature is 250-255°C, and the esterification time is 3.2h. , 278-290°C for 3.2h of polycondensation reaction to obtain a low-crystallinity copolyester with an intrinsic viscosity of 0.69dl / g and a melting point of 210°C; the low-crystallinity copolyester is extruded as the The outer layer of the composite film;

[0075] The organically treated silica powder was mixed with terephthalic acid (PTA), isophthalic acid (IPA), 2-methyl-1...

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Abstract

The invention relates to a medical super-tough puncture-resistant high-barrier composite film and a preparation method thereof. A multilayer laminated structure of polyester with a high-melting-pointcrystal form and crystalline polyamide resin is selected as a core layer of the composite film, so that the characteristics of puncture resistance and high barrier are achieved; an inner surface layeris prepared by adopting low-melting-point amorphous polyester, has good low-temperature heat sealing performance, and can have good binding force with the core layer, so that the problem of easy layering with the core layer is solved; and the outer surface layer is prepared by adopting low-crystallinity copolymerized polyester, has good printing and barrier performance, and has good adhesive force with the core layer. According to the invention, a multi-layer co-extrusion and lamination technology is used for carrying out processes such as die head extrusion, stretching and the like, so thatthe composite film with controllable thickness, easy molding and relatively high film yield is prepared. Meanwhile, the raw materials are cheap and are easily available, the preparation process is easy to control, and the composite film has industrial production and practical application values.

Description

technical field [0001] The invention belongs to the technical field of medical polymer materials, and in particular relates to a medical puncture-resistant high-barrier film and a preparation method thereof. Background technique [0002] China's non-PVC multi-layer co-extruded medical sterile film market is huge, and the demand for medical infusion fluid consumption is growing at a rate of 5-8% per year. Now it mainly relies on imports from Europe, the United States and Japan. [0003] At present, the mainstream non-PVC multi-layer co-extruded medical film consists of three layers. The inner layer requires good heat sealability, puncture resistance, inertness and elasticity with the liquid medicine, and generally uses PP, SEBS and other materials; the middle layer requires good flexibility, barrier properties, transparency, and mechanical strength, mainly using SEBS , PE, PP and other materials; the outer layer requires good printability, barrier properties, transparency an...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/34B32B27/18B32B27/08B29C69/02B29C48/08B29C48/21B29L7/00B29L9/00B65D65/40
CPCB29L2007/00B29L2009/00B32B27/08B32B27/18B32B27/34B32B27/36B32B2250/24B32B2307/558B32B2307/724B32B2307/7248B32B2439/70B32B2439/80B65D65/40
Inventor 杨金玲叶青袁秋环
Owner SHANDONG UNIV
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