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
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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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