Modified hydrophilic polyurethane dressing and preparation method thereof

A hydrophilic polyurethane, polyurethane technology, applied in the fields of medical science, absorbent pads, bandages, etc., achieves the effects of good moisturizing performance, simple preparation method and low equipment requirements

Inactive Publication Date: 2017-11-10
ANHUI JIANYUAN MEDICAL APP & INSTR EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing dressings have a variety of performances, but the performance of the dressing itself needs to be improved, such as waterproof, poor ability to absorb wound exudate, and use for 2-3 hours, the number of bacteria on the dressing is more, there is an urgent need to develop a wound healing, relieve pain for people

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A modified hydrophilic polyurethane dressing, comprising the following components by weight: 20 parts of polyurethane, 25 parts of collagen, 5 parts of hyaluronic acid, 5 parts of chitosan, 1 part of egg white, and 20 parts of sodium alginate , 1 part of Cordyceps extract, 8 parts of silver nano solution, 10 parts of carboxymethyl cellulose, 12 parts of bamboo fiber, 12 parts of sodium acetyl cellulose.

[0020] The preparation method of above-mentioned modified hydrophilic polyurethane dressing comprises the following steps:

[0021] Step 1, taking each component by weight;

[0022] Step 2, melt polyurethane, collagen, hyaluronic acid, chitosan, egg white and sodium alginate in a reaction kettle, and after the temperature is lowered to 50°C, add the remaining raw materials, cool down and defoam to obtain the first mixture for later use;

[0023] In step 3, the first mixture is coated on the colloid layer, and after natural drying, the modified hydrophilic polyurethane...

Embodiment 2

[0026] A modified hydrophilic polyurethane dressing, comprising the following components by weight: 30 parts of polyurethane, 30 parts of collagen, 7 parts of hyaluronic acid, 7 parts of chitosan, 3 parts of egg white, and 28 parts of sodium alginate , 3 parts of Cordyceps extract, 11 parts of silver nano solution, 16 parts of carboxymethyl cellulose, 15 parts of bamboo fiber, 15 parts of sodium acetyl cellulose.

[0027] The preparation method of above-mentioned modified hydrophilic polyurethane dressing comprises the following steps:

[0028] Step 1, taking each component by weight;

[0029] Step 2, melt polyurethane, collagen, hyaluronic acid, chitosan, egg white and sodium alginate in a reaction kettle, and after the temperature is lowered to 55°C, add the rest of the raw materials, cool down and defoam to obtain the first mixture for later use;

[0030] In step 3, the first mixture is coated on the colloid layer, and after natural drying, the modified hydrophilic polyure...

Embodiment 3

[0033] A modified hydrophilic polyurethane dressing, comprising the following components by weight: 40 parts of polyurethane, 40 parts of collagen, 10 parts of hyaluronic acid, 8 parts of chitosan, 4 parts of egg white, and 30 parts of sodium alginate , 4 parts of Cordyceps extract, 13 parts of silver nano solution, 20 parts of carboxymethyl cellulose, 18 parts of bamboo fiber, 20 parts of sodium acetyl cellulose.

[0034] The preparation method of above-mentioned modified hydrophilic polyurethane dressing comprises the following steps:

[0035] Step 1, taking each component by weight;

[0036] Step 2, melt polyurethane, collagen, hyaluronic acid, chitosan, egg white and sodium alginate in a reaction kettle, and after cooling down to 50-60°C, add the rest of the raw materials, cool down and defoam to obtain the first mixture for later use;

[0037] In step 3, the first mixture is coated on the colloid layer, and after natural drying, the modified hydrophilic polyurethane dres...

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PUM

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Abstract

A modified hydrophilic polyurethane dressing and a preparation method thereof. The dressing comprises the following components: 20-40 parts of polyurethane, 25-40 parts of collagen, 5-10 parts of hyaluronic acid, 5-8 parts of chitosan, 1-4 parts of egg white, 20-30 parts of sodium alginate, 1-4 parts of Cordyceps extract, 8-13 parts of silver nano solution, 10-20 parts of carboxymethyl cellulose, 12-18 parts of bamboo fiber, acetyl fiber 12‑20 parts of plain sodium. Preparation method: Weigh each component by weight; melt polyurethane, collagen, hyaluronic acid, chitosan, egg white and sodium alginate in a reaction kettle, drop to 50-60°C, add other raw materials, and cool down Degassing to obtain the first mixture for later use; coating the first mixture on the colloid layer, drying naturally, and encapsulating to obtain a modified hydrophilic polyurethane dressing. Compared with the prior art, it has better moisturizing performance, no irritation to the skin, good antibacterial effect, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of biomedical dressings, in particular to a modified hydrophilic polyurethane dressing and a preparation method thereof. Background technique [0002] In recent years, the medical accessories market has great room for growth. Traditional dressings are degreased gauze, which has a limited ability to absorb physiological fluids, and it is easy to touch the wound when changing, causing secondary infection. [0003] Currently, doctors use dressings not only to cover wounds, but also to promote wound healing. Existing dressings have a variety of performances, but the performance of the dressing itself needs to be improved, such as waterproof, poor ability to absorb wound exudate, and use for 2-3 hours, the number of bacteria on the dressing is more, there is an urgent need to develop a wound healing, Pain relief for people. Contents of the invention [0004] Aiming at the deficiencies of the prior art, the object o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/40A61L15/32A61L15/28A61L15/26A61L15/18A61L15/44A61L15/46
CPCA61L15/40A61L15/18A61L15/26A61L15/28A61L15/325A61L15/44A61L15/46A61L2300/104A61L2300/30A61L2300/404C08L75/04
Inventor 吴代斌殷星
Owner ANHUI JIANYUAN MEDICAL APP & INSTR EQUIP
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