Unlock instant, AI-driven research and patent intelligence for your innovation.

Low trauma wound dressing with improved moisture vapor permeability

A wound dressing and permeability technology, applied in the field of wound dressings, can solve the problems of lack of initial skin adhesion and peeling off.

Inactive Publication Date: 2003-05-21
3M CO
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such tapes have a tendency to lack sufficient initial adhesion to the skin and often fall off

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] Synthesis of microspheres

[0168] (Adhesive No. 1-19)

[0169] (1) 450 g of deionized water, (2) 6 grams of Standapol® A (an ammonium lauryl sulfate emulsifier available from Henkel AG), (3) 0.72 grams of Lucidol®-70 (a type of ammonium lauryl sulfate available from Henkel AG) Pennwalt Corporation's benzoyl peroxide), and (4) a mixture of 150 grams of monomers of isooctyl acrylate, isodecyl acrylate, acrylic acid, N-vinylpyrrolidone, and poly(ethylene oxide) acrylate was charged to the attached In a one-liter resin reactor with a mechanical stirrer, a condenser, and inlet and outlet pipes, the monomer ratios are shown in Table 2 and Table 4. Prior to polymerization into Adhesives 15 and 16, the monomer suspension was homogenized in an Omni(R) mixer (available from Omni International Inc.). Then, the mixture was stirred at 400 rpm to polymerize the residue. Vacuumize the gas in the reaction vessel, and replace the reaction vessel with argon until the polymerization i...

Embodiment 2

[0171] Adhesive Test (Adhesive No. 1-19)

[0172] Measure the initial water vapor transmission rate (vertical) MVTR of the sample according to the determination method described here up , initial skin adhesion (T 0 ) and skin adhesion after 24 hours of continuous contact with the skin (T 24 ), and the test results are shown in Table 3.

[0173] adhesive #

[0174] sample #

Embodiment 3

[0176] Synthesis of Microspheres (Adhesive No. 20-40)

[0177] Add (i) 450 grams of deionized water, (ii) 6 grams of Standapol® A (dodecyl alcohol purchased from Henkel A G) to a 1-liter resin reactor equipped with a mechanical stirrer, condenser, and inlet-outlet piping. Ammonium sulfate emulsifier, (iii) 0.72 grams of Lucidol-70 (benzoyl peroxide from Pennwalt Corporation) and (iv) 150 grams of monomeric isooctyl acrylate, N-vinylpyrrolidone, acrylic acid and poly(epoxy ethane) acrylate mixture, mixed according to the monomer ratios listed in Table 2 and Table 4. For adhesives 20, 23-26 and 32-36, before polymerization, the monomer suspension was mixed in an Omni mixer (purchased from Omni International Inc.). For the polymerization of the residue, the mixture was stirred at 400rpm. The gas in the reaction vessel was evacuated and replaced with argon until the polymerization was completed. The temperature of the reactor rose to 55- 65°C, in order to complete the polymeriz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discoveres a low trauma wound dressing including a moisture-vapor permeable backing and a contiguous particulate adhesive layer comprised of tacky, substantially solvent-insoluble, solvent-dispersible, acrylate-based, elastomeric, pressure-sensitive adhesive microspheres.

Description

field of invention [0001] The present invention relates to wound dressings and in particular to wound dressing tapes having a layer of pressure sensitive adhesive which securely covers the wound. Background of the invention [0002] Wound dressing strips used to coat exudative wounds should prevent the introduction of bacteria or other pathogens into the wound and maximize evaporation of exuded fluid. At the same time, such a tape should also develop good initial adhesion to prevent its premature peeling and a small bond so that its removal is minimally traumatic to the skin. [0003] Commercially available wound dressing tapes typically include rubber-based or acrylic-based adhesives, with acrylic-based adhesives generally being preferred for their hypoallergenic properties. [0004] Hypoallergenicity of adhesives is considered a factor in evaluating the acceptability of adhesives for use in wound dressing tapes, whereas skin reversion damage upon removal of wound dressing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61F13/00A61F13/02A61L15/58
CPCY10T428/249984Y10T428/249986A61F13/023A61L15/585Y10T428/249983A61F2013/0071Y10T428/2891A61F2013/00663A61F2013/00774Y10T428/28A61L15/58Y10T428/249981A61L15/42C08L33/06A61L15/24
Inventor J·德尔加多R·J·格茨S·F·西尔弗D·H·卢卡斯特
Owner 3M CO