Medical latex film and preparation method thereof

A film and latex technology, applied in the field of medical latex film and its preparation, can solve the problems of aging resistance, oil resistance, chemical resistance, temperature resistance, frost resistance, poor adhesion, etc., and achieves excellent mechanical properties and good compatibility. , the effect of easy modification

Inactive Publication Date: 2018-12-18
SUZHOU BEC BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural rubber latex is characterized by high solid content, good film-forming properties, and can adjust viscosity at will, but its aging resistance, oil resistance, chemical resistance, temperature resistance, and frost resistance are poor.
Natural rubber latex has high cohesion and high self-adhesiveness, but because of its small molecular chain polarity, it has poor adhesion to adherends, especially those with high polarity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of medical latex film, comprises the composition of following parts by weight:

[0036] Nano silver 0.01kg;

[0037] Water-soluble chitosan 0.1kg;

[0038] Antioxidant 0.1kg;

[0039] Anti-slip agent 2kg;

[0040] Water-based polyurethane 5kg;

[0041] Natural latex 80kg.

[0042] The preparation method of medical latex film comprises the following steps:

[0043] (1) Put each component into the reaction kettle, heat to 90°C in a nitrogen atmosphere, stir continuously at a speed of 100r / min, and react for 2h to obtain a pre-finished product;

[0044] (2) Send the pre-finished product prepared in step (1) into a twin-screw extruder, the extrusion temperature is 175°C, the screw speed is 40-45Hz, the twin-screw extruded strip is water-cooled, air-dried, and pelletized to obtain masterbatch ;

[0045] (3) Extrude the masterbatch obtained in step (2) into a plastic film blowing machine to blow a film to obtain a medical film.

Embodiment 2

[0047] A kind of medical latex film, comprises following composition:

[0048] Nano silver 0.05kg;

[0049] Water-soluble chitosan 1kg;

[0050] Antioxidant 1kg;

[0051] Anti-slip agent 5kg;

[0052] Waterborne polyurethane 10kg;

[0053] Natural latex 90kg.

[0054] The preparation method of medical latex film comprises the following steps:

[0055] (1) Put each component into the reaction kettle, heat to 100°C in a nitrogen atmosphere, stir continuously at a speed of 120r / min, and react for 3h to obtain a pre-finished product;

[0056] (2) Send the pre-finished product prepared in step (1) into a twin-screw extruder, the extrusion temperature is 185°C, the screw speed is 40-45Hz, the twin-screw extruded strip is water-cooled, air-dried, and pelletized to obtain masterbatch ;

[0057] (3) Extrude the masterbatch obtained in step (2) into a plastic film blowing machine to blow a film to obtain a medical film.

Embodiment 3

[0059] A kind of medical latex film, comprises following composition:

[0060] Nano silver 0.03kg;

[0061] Water-soluble chitosan 0.5kg;

[0062] Antioxidant 0.5kg;

[0063] Anti-slip agent 3kg;

[0064] Water-based polyurethane 8kg;

[0065] 85 parts of natural latex.

[0066] The preparation method of medical latex film comprises the following steps:

[0067] (1) Put each component into the reaction kettle, heat to 100°C in a nitrogen atmosphere, stir continuously at a speed of 110r / min, and react for 3h to obtain a pre-finished product;

[0068](2) Send the pre-finished product prepared in step (1) into a twin-screw extruder, the extrusion temperature is 180°C, the screw speed is 40-45Hz, the twin-screw extruded strip is water-cooled, air-dried, and pelletized to obtain masterbatch ;

[0069] (3) Extrude the masterbatch obtained in step (2) into a plastic film blowing machine to blow a film to obtain a medical film.

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PUM

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Abstract

The invention provides a medical latex film and a preparation method thereof. The medical latex film comprises 0.01-0.05 part of nano-silver, 0.1-1 part of water-soluble chitosan, 0.1-1 part of an antioxidant, 2-5 parts of an antiskid agent, 5-10 parts of water-based polyurethane and 80-90 parts of natural latex, wherein the antioxidant is tea polyphenol, and the antiskid agent is alpha hydroxy acids. The tea polyphenol has a strong elimination effect on harmful free radicals, and has a very significant anti-oxidation effect. The alpha hydroxy acids are multiple organic acids extracted from fruits, are active compounds existing in many natural fruits or yoghurts, are harmless to human bodies, and have a remarkable antiskid effect. The invention also provides the preparation method of the medical latex film. The medical latex film has anti-oxidation and antiskid effects, and has an antibacterial effect.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a medical latex film and a preparation method thereof. Background technique [0002] Natural latex is a viscous milky white liquid with an appearance like milk. It is a milky water dispersion of rubber particles in a near-neutral medium. In the air, due to the action of oxygen and microorganisms, the acidity of the latex increases, and it will be natural within 2-12 hours. Solidification, in order to prevent natural solidification, it is necessary to add a certain amount of ammonia solution as a protective agent. Natural rubber latex belongs to the thermoplastic synthetic resin of rubber, which is characterized by high elasticity, good film-forming performance during bonding, and high flexibility of the film, so that the film has excellent flex resistance, shock resistance and creep resistance. , suitable for the bonding of components under dynamic conditions and the bonding b...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08L5/08C08L75/04C08K13/02C08K3/08C08K5/1545C08K5/092C08K5/09C08J5/18
CPCC08J5/18C08J2307/02C08J2405/08C08J2475/04C08K5/09C08K5/092C08K5/1545C08K13/02C08K2003/0806C08K2201/011
Inventor 李苏杨徐勤霞成清明
Owner SUZHOU BEC BIOLOGICAL TECH
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