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Breathable polyurethane fixing film

A polyurethane film and polyurethane technology, which is applied in the direction of pressure-sensitive film/sheet, film/sheet release liner, film/sheet adhesive, etc., can solve the problem of poor moisture permeability and air permeability of fixed film, and poor air permeability Poor performance, skin redness and itching, etc., to reduce discomfort, reduce the area of ​​glue application, and reduce allergies

Active Publication Date: 2021-11-05
浙江敷茂生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the fixed films on the market are not very good in terms of moisture permeability and air permeability. After long-term application, the skin becomes red, itchy, and allergic due to poor air permeability.

Method used

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  • Breathable polyurethane fixing film
  • Breathable polyurethane fixing film
  • Breathable polyurethane fixing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as Figures 1 to 4 As shown, the present invention provides a breathable polyurethane fixed film, comprising a paper frame layer 1, a polyurethane layer 2, an adhesive layer 3 and a release layer 4 arranged in sequence;

[0058] The polyurethane layer 2 is a hydrophilic and highly moisture-permeable polyurethane film, the adhesive layer 3 is a pressure-sensitive adhesive 31, and the pressure-sensitive adhesive 31 is provided with a through hole 311, and the diameter of the through hole 311 is 1- 3mm;

[0059] The preparation method of the hydrophilic high moisture-permeable polyurethane film comprises the following steps:

[0060] a) Prepare polyurethane prepolymer A, prepare by following proportioning and process:

[0061] 30-60 parts of toluene diisocyanate;

[0062] 5-50 parts of polyethylene glycol;

[0063] 0.01 to 30 parts of polypropylene glycol;

[0064] 0.01 to 5 parts of glycerol;

[0065] 0.01 to 5 parts of 1,4-butanediol;

[0066] 0.01 to 5 parts...

Embodiment 2

[0076] Such as Figures 1 to 4 As shown, the present invention provides a breathable polyurethane fixed film, comprising a paper frame layer 1, a polyurethane layer 2, an adhesive layer 3 and a release layer 4 arranged in sequence;

[0077] The polyurethane layer 2 is a hydrophilic and highly moisture-permeable polyurethane film, the adhesive layer 3 is a pressure-sensitive adhesive 31, and the pressure-sensitive adhesive 31 is provided with a through hole 311, and the diameter of the through hole 311 is 1- 3mm;

[0078] The preparation method of the hydrophilic high moisture-permeable polyurethane film comprises the following steps:

[0079] a) Prepare polyurethane prepolymer A, prepare by following proportioning and process:

[0080] 40 parts of toluene diisocyanate;

[0081] 50 parts of polyethylene glycol;

[0082] 4.5 parts of polypropylene glycol;

[0083] 3 parts of glycerol;

[0084] 2 parts of 1,4-butanediol;

[0085] 0.5 part of triethanolamine;

[0086] Put ...

Embodiment 3

[0104] A breathable polyurethane fixed film, the difference from Example 2 is that the polyurethane prepolymer A is prepared in step a), prepared according to the following proportioning and process:

[0105] 40 parts of toluene diisocyanate;

[0106] 45 parts of polyethylene glycol;

[0107] 9.5 parts of polypropylene glycol;

[0108] 4.5 parts of glycerol;

[0109] 0.5 parts of 1,4-butanediol;

[0110] 0.5 part of triethanolamine;

[0111] Put the above raw materials into the reaction kettle, the reaction temperature is 60°C-90°C, the reaction time is 80-180min, and the polyurethane prepolymer A is prepared through polymerization reaction.

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Abstract

The invention discloses a breathable polyurethane fixing film. The breathable polyurethane fixing film comprises a paper frame layer, a polyurethane layer, an adhesive layer and a release layer which are sequentially arranged; the polyurethane layer is a hydrophilic high-moisture-permeability polyurethane film, the adhesive layer is a pressure-sensitive adhesive, through holes are formed in the pressure-sensitive adhesive, and the aperture of each through hole is 1-3 mm; the preparation method of the hydrophilic high-moisture-permeability polyurethane film comprises the following steps: a) preparing a polyurethane prepolymer A, b) preparing a polyurethane prepolymer B, and c) coating the release layer with the polyurethane prepolymer B, and drying the release layer in a tunnel drying oven at the drying temperature of 60-150 DEG C to prepare the hydrophilic high-moisture-permeability polyurethane film with the thickness of 15-25 microns. According to the breathable polyurethane fixing film, the paper frame layer, the polyurethane layer, the adhesive layer and the release layer are arranged in a matched mode, meanwhile, the polyurethane layer with high breathability is prepared, the higher water vapor permeability is achieved, the film is softer and more comfortable, the film is soft and breathable when being attached to the skin, and the comfort of a patient is improved.

Description

technical field [0001] The invention relates to the technical field of fixed film, in particular to a breathable polyurethane fixed film. Background technique [0002] The use of indwelling needles can reduce the pain caused by repeated venipuncture and the fear of injections, facilitate clinical medication, rescue medication for acute and critical patients, and reduce the workload of nurses. Therefore, indwelling needles are becoming more and more popular in clinical practice. widely used. Indwelling needles need to be applied and fixed in clinical applications. Generally, indwelling needles are used for 3-4 days, so there are high requirements for indwelling needle sticking (fixed film), which require breathable and comfortable sticking for a long time Not allergic. [0003] At present, most of the fixed films on the market are not very good in terms of moisture permeability and air permeability. After long-term application, the poor air permeability will cause the skin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/38C09J7/40C08G18/32C08G18/48C08G18/66
CPCC09J7/29C09J7/38C09J7/403C08G18/6688C08G18/4833C08G18/4808C08G18/4825C08G18/3206C08G18/3281C09J2301/122C09J2301/302C09J2301/16C09J2475/006
Inventor 王李锋庄昌东
Owner 浙江敷茂生物科技有限公司
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