Hydrocolloid dressing and preparation method thereof

A hydrocolloid and hydrocolloid layer technology, applied in bandages, coatings, absorbent pads, etc., can solve the problems of two-layer detachment, air bubbles, insufficient binding force of hydrocolloid dressings, etc., and achieve the effect of reducing process costs.

Inactive Publication Date: 2014-11-05
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the polymer film needs to be recombined with the hydrocolloid layer after film formation, the hydrocolloid dressing formed by this conventional method has insufficient bonding force between the two layers, and it is easy to produce "bubbles" during use, that is, due to absorption Blistering due to detachment of the two layers after the wound exudates

Method used

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  • Hydrocolloid dressing and preparation method thereof
  • Hydrocolloid dressing and preparation method thereof
  • Hydrocolloid dressing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Based on the total weight of the raw materials used, 35% of BR9000 butadiene rubber purchased from Qilu Petrochemical, 45% of PIB 6H polyisobutylene purchased from RitChem, and 20% of HS100000 YP2 hydroxyethyl cellulose purchased from Clariant Put it into a vacuum kneader for normal kneading for 1-2 hours, and then vacuum (vacuum 0.07MPa) for 1 hour.

[0074] The above mixture was placed in a rubber extruder and extruded into a hydrocolloid sheet with an average thickness of 0.5 mm. The extrusion temperature is 80-120°C.

[0075] Use a solvent-type coater to coat the V-Coat AB5454LV polyurethane solution (solid content: 30%, viscosity: 12,000-18,000cps / 25℃) purchased from Jiaxing Puyou on the above-mentioned hydrocolloid extruded sheet, using a comma Roll, gap (gap) is set to 83 microns. Dry the solvent in an oven with a temperature gradient of 40-200°C. After drying, a polyurethane film with an average thickness of 25 microns is formed on the hydrocolloid layer.

[0076] ...

Embodiment 2

[0078] Based on the total weight of the raw materials used, 50% was purchased from Goodyear's Natsyn2210 polyisoprene, 20% was purchased from Hangzhou Shunda's SDG-8650 polyisobutylene, and 30% was purchased from Suzhou Weiyi's FH5000 carboxymethyl The sodium cellulose is put into a vacuum kneader and kneaded normally for 1-2 hours, and then vacuumed (vacuum degree is 0.05 MPa) for 1 hour.

[0079] The above mixture was placed in a rubber extruder and extruded into a hydrocolloid sheet with an average thickness of 1 mm. The extrusion temperature is 80-120°C.

[0080] The V-Coat AB5858LV polyurethane solution (solid content: 30%, viscosity: 25,000-40,000 cps / 25° C.) purchased from Jiaxing Puyou was coated on the above-mentioned hydrocolloid extruded sheet with a solvent coating machine. Dry the solvent in an oven with a temperature gradient of 40-200°C. After drying, a polyurethane film with an average thickness of 30 microns is formed on the hydrocolloid layer. Cross-link the sa...

Embodiment 3

[0082] Using the same formula and process conditions as in Example 2, a hydrocolloid sheet with an average thickness of 1 mm was prepared.

[0083] The V-Coat775 polyurethane solution (solid content: 30%, viscosity: 85,000-110,000 cps / 25° C.) purchased from Jiaxing Puyou was coated on the above-mentioned hydrocolloid extruded sheet with a solvent coating machine. Dry the solvent in an oven with a temperature gradient of 40-200°C. After drying, a polyurethane film with an average thickness of 30 microns is formed on the hydrocolloid layer. Cross-link the sample with gamma rays, and set the gamma dose to 10-50kGy.

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Abstract

The present disclosure provides a hydrocolloid dressing, comprising: a hydrocolloid layer; and a polymer film layer, disposed on the hydrocolloid layer; wherein the polymer film layer is formed by coating a polymer solution or a liquid polymer. The present disclosure also provides a method for preparing a hydrocolloid dressing, comprising: forming a hydrocolloid layer; coating a polymer solution or a liquid polymer on the hydrocolloid layer; and drying.

Description

Technical field [0001] The invention relates to a hydrocolloid dressing, in particular to a hydrocolloid dressing with a polymer film formed by in-situ coating. The invention also relates to a preparation method of the hydrocolloid dressing. Background technique [0002] Hydrocolloid dressing is a widely used wound dressing. Hydrocolloid dressings usually include a hypoallergenic hydrocolloid layer and a polymer film covering the hydrocolloid layer. At present, in the preparation of hydrocolloid dressings, the polymer film is generally extruded on release paper or other base materials in advance, and then compounded with the hydrocolloid layer when extruding, and then the release paper or other base materials are peeled off. Since the polymer film needs to be compounded with the hydrocolloid layer after the film is formed, the hydrocolloid dressing formed by this conventional method has insufficient binding force between the two layers, which is prone to "bubble" problems durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C08J3/28C08J3/24
CPCA61L2420/02A61L15/58A61L15/60
Inventor 范婷朱敦深
Owner 3M INNOVATIVE PROPERTIES CO
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