Modified high-blood-absorption polyurethane sponge as well as preparation method and application thereof

A polyurethane sponge, modified technology, applied in absorbent pads, bandages, medical science and other directions, can solve the problems of increased biological toxicity, poor absorption performance, poor use feeling, etc., to reduce the reduction of absorption capacity and improve blood absorption capacity , the effect of comfortable use experience

Active Publication Date: 2021-01-26
WANHUA CHEM GRP CO LTD
View PDF11 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses organotin as a catalyst and dichloromethane as a blowing agent, and the residues of the two chemicals will increase biological toxicity and affect its application in the medical and health field
[0004] Invention patent CN 110577627A discloses a method for preparing an absorbent material with high absorption capacity. The polyols used in this method are all polyether polyols. The obtained polyurethane foam will swell severely after sucking blood, and its mechanical properties will drop significantly. Affect the user experience; at the same time, the material has poor degradability, and the swelling is serious after absorbing blood, and the mechanical properties drop significantly after absorbing blood
Large porosity, poor absorption performance, unable to overcome gravity to effectively distribute fluid, resulting in poor liquid permeability of foam, low absorption utilization rate, and poor absorption effect
Secondly, excessive fluid con...

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified high-blood-absorption polyurethane sponge as well as preparation method and application thereof
  • Modified high-blood-absorption polyurethane sponge as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] A. Weigh respectively by weight: a modified high blood-absorbing polyurethane sponge, made of the following raw materials by weight: 30 parts of isocyanate, wherein the mass ratio of methyl isocyanate to hexamethylene isocyanate is 6:4 , polylactic acid glycol 18 parts, PEG-2000 42 parts, fluff pulp 15 parts, super absorbent resin WHS 300 30 parts, chitosan 5 parts, water 90 parts, hydrophilic surfactant ( PE6400: 188=1:2) 5 parts, chain extender TMP 2 parts, inorganic filler 300 mesh diatomite 20 parts, antioxidant IRGASTAB PUR 68 0.3 part;

[0080] B. React isocyanate, polyether polyol, polyester polyol, polymer polyol, chain extender, and antioxidant at 80°C for 12 hours to obtain a polyol-modified prepolymer;

[0081] C. Mix fluff pulp fiber, chitosan, hydrophilic surfactant, inorganic filler and water to obtain white material, and keep it at 20±2°C;

[0082] D. Raise the temperature of the prepolymer to 40°C, then mix the super absorbent resin and the modified ...

Embodiment 2

[0086] A. Weigh respectively by weight: a modified high blood-absorbing polyurethane sponge, made of the following raw materials by weight: 30 parts of isocyanate, wherein the ratio of methyl isocyanate to hexamethylene isocyanate is 6:4, 36 parts of polylactic acid glycol, 84 parts of PEG-2000, 15 parts of fluff pulp, 30 parts of super absorbent resin WHS 300, 5 parts of chitosan, 90 parts of water, hydrophilic surfactant ( PE6400: 188=1:2) 5 parts, chain extender TMP 2 parts, inorganic filler 300 mesh diatomite 20 parts, antioxidant IRGASTAB PUR 68 0.3 part;

[0087] B. React isocyanate, polyether polyol, polyester polyol, polymer polyol, chain extender, and antioxidant at 80°C for 12 hours to obtain a polyol-modified prepolymer;

[0088] C. Mix fluff pulp fiber, chitosan, hydrophilic surfactant, inorganic filler and water to obtain white material, and keep it at 20±2°C;

[0089] D. Raise the temperature of the prepolymer to 40°C, then mix the super absorbent resin and t...

Embodiment 3

[0093] A. Weigh respectively by weight: a modified high blood-absorbing polyurethane sponge, made of the following raw materials by weight: 30 parts of isocyanate, wherein the ratio of methyl isocyanate to hexamethylene isocyanate is 6:4, 30 parts of polylactic acid glycol, 70 parts of PEG-2000, 15 parts of fluff pulp, 30 parts of super absorbent resin WHS 300, 15 parts of chitosan, 90 parts of water, hydrophilic surfactant ( PE6400: 188=1:2) 5 parts, chain extender TMP 2 parts, inorganic filler 300 mesh diatomite 20 parts, antioxidant IRGASTAB PUR 68 0.3 part;

[0094] B. React isocyanate, polyether polyol, polyester polyol, polymer polyol, chain extender, and antioxidant at 80°C for 12 hours to obtain a polyol-modified prepolymer;

[0095] C. Mix fluff pulp fiber, chitosan, hydrophilic surfactant, inorganic filler and water to obtain white material, and keep it at 20±2°C;

[0096] D. Raise the temperature of the prepolymer to 40°C, then mix the super absorbent resin and ...

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

No PUM Login to view more

Abstract

The invention provides a modified high-blood-absorption polyurethane sponge as well as a preparation method and application thereof. The polyurethane sponge is prepared from the following raw materials: isocyanate, polyol, super absorbent resin, fluff pulp, cationic polysaccharide, water, a hydrophilic surfactant, a chain extender, an inorganic filler and an antioxidant. The prepared polyurethanesponge has the advantages of being high in liquid guiding performance, high in absorption foam utilization rate, high in blood absorption capacity, low in blood reverse osmosis rate, low in swelling rate after blood absorption and the like, high strength of the sponge can be maintained after blood absorption, and the polyurethane sponge is suitable for the field of disposable blood absorption hygienic products such as sanitary towels and medical dressings.

Description

technical field [0001] The invention relates to the field of polyurethane foam material products, in particular to a modified high blood-absorbing polyurethane sponge, a preparation method and its application in the medical and health field. Background technique [0002] With the improvement of people's living standards, people's demand for disposable sanitary products has gradually increased, and higher requirements have been put forward for the quality of disposable sanitary products. With the industrialization of acrylic-based superabsorbent resins, superabsorbent disposable sanitary products (including feminine hygiene products, baby diapers, etc.) filled with superabsorbent resins have developed rapidly, but there are many problems in the conventional carrier of superabsorbent resins, including dispersion Uneven, easy to cause problems such as gel clogging and poor comfort after absorbing liquid. At the same time, with the diversification of user experience, people's d...

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
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/62C08G18/64C08G18/32C08G18/12C08K7/26A61L15/26A61L15/42A61L15/60C08G101/00
CPCC08G18/6611C08G18/4081C08G18/4833C08G18/428C08G18/6216C08G18/6484C08G18/3206C08G18/12C08K7/26A61L15/26A61L15/42A61L15/425A61L15/60C08G2101/00C08G18/40C08L75/04
Inventor 周伟琦尹金超杨晓珂韩洋田云
Owner WANHUA CHEM GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap