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Novel safety emulsion for medical and food grade spunlace nonwoven

A spunlace non-woven fabric, food-grade technology, applied in adhesive types, textiles and papermaking, monocarboxylate copolymer adhesives, etc., to improve physical properties, reduce lint and lint, and good washing resistance Effect

Inactive Publication Date: 2016-09-07
JIANGSU AIKOP NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the production process, there are still certain technical problems to be overcome. For example, 1. How to reduce the friction and entanglement between the regenerated fibers and reduce the static electricity of the fibers during the regeneration pretreatment of the leftover fibers; The fiber cohesion of recycled fibers in the subsequent processing process, 3. How to reduce the linters and dust of recycled fibers as much as possible, and reduce the neps produced in the process of opening and regeneration. 4. How to avoid or reduce the shedding produced in the use process hair, dandruff

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A novel safe emulsion of medical and food-grade spunlace nonwovens, the preparation method of which is as follows:

[0029] (a) Take deionized water, pass it through the reverse osmosis membrane under high pressure, then put it into an insulating container, perform an ion exchange by ion exchange method, purify the deionized water, and increase its resistivity to make the resistance of deionized water rate at least 8MΩ·cm;

[0030] (b) Under the protection of nitrogen gas, add 50% of the deionized water obtained in step (a) to the reactor, heat and keep it at 42°C, then add cationic emulsifier into the reactor, mix and stir Half an hour, then add 25% deionized water, then heat to 45°C and maintain, add cationic emulsifier and mix and stir for half an hour to obtain an emulsified solution;

[0031] (c) Add 35% initiator and the remaining deionized water to the emulsified solution, mix well, then add ethylene monomer and vinyl acetate monomer, carry out pressure polymeri...

Embodiment 2

[0035] A novel safe emulsion of medical and food-grade spunlace nonwovens, the preparation method of which is as follows:

[0036] (a) Take deionized water, pass it through the reverse osmosis membrane under high pressure, then put it into an insulating container, perform an ion exchange by ion exchange method, purify the deionized water, and increase its resistivity to make the resistance of deionized water rate at least 8MΩ·cm;

[0037] (b) Under the protection of nitrogen, add 55% of the deionized water obtained in step (a) to the reactor, heat and keep it at 40°C, then add cationic emulsifier into the reactor, mix and stir Half an hour, then add 22% deionized water, then heat to 45~47°C and maintain, add cationic emulsifier and mix and stir for half an hour to obtain an emulsified solution;

[0038] (c), add 34% initiator and the remaining deionized water to the emulsified solution, mix well, then add ethylene monomer and vinyl acetate monomer, carry out pressure polymeri...

Embodiment 3

[0042] A novel safe emulsion of medical and food-grade spunlace nonwovens, the preparation method of which is as follows:

[0043] (a) Take deionized water, pass it through the reverse osmosis membrane under high pressure, then put it into an insulating container, perform an ion exchange by ion exchange method, purify the deionized water, and increase its resistivity to make the resistance of deionized water rate at least 8MΩ·cm;

[0044] (b) Under the protection of nitrogen gas, add 65% of the deionized water obtained in step (a) to the reactor, heat and keep it at 45°C, then add cationic emulsifier into the reactor, mix and stir Half an hour, then add 20% deionized water, then heat to 45~47°C and maintain, add cationic emulsifier and mix and stir for half an hour to obtain an emulsified solution;

[0045](c) Add 40% initiator and the remaining deionized water to the emulsified solution, mix well, then add ethylene monomer and vinyl acetate monomer, carry out pressure polyme...

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Abstract

The invention discloses novel safety emulsion for medical and food grade spunlace nonwoven. Ethylene and vinyl acetate serve as monomers, suitable non-ionic emulsifiers and cationic emulsifiers are screened, and the emulsion is prepared by a pressurized copolymerization process, non-toxic and harmless, and stable in phase. Preservation time of the emulsion is as long as 24 months, the solid content ratio of the emulsion reaches more than 53%, the emulsion has fine hydrophilic performance and excellent washing and chemical resistance, can be blended with other strongly cationic components (such as methyl guanidine and metformin), ensures antibacterial capability and has excellent bonding strength with cellulose fibers such as cotton and viscose. The novel safety emulsion for the medical and food grade spunlace nonwoven has the advantages that cohesive force and binding force between regenerated fibers can be effectively improved, the physical performance of a product is enhanced, picking and dusting in the use process of the product are decreased, the service life or frequency of the product is prolonged, the product is durable and resistant to washing while fine water absorption capability is kept, and the emulsion can be compatibly used with the vast majority of cationic antibacterial agents.

Description

technical field [0001] The invention relates to the field of regeneration production of spunlace non-woven fabrics, in particular to a novel safe emulsion suitable for medical and food-grade spunlace non-woven fabrics. Background technique [0002] Spunlaced non-woven fabrics are sprayed onto one or more layers of fiber nets by high-pressure fine water flow, so that the fibers are entangled with each other, so that the fiber nets can be reinforced and have a certain strength, and the obtained fabric is spunlace non-woven fabrics. Its fiber raw materials come from a wide range of sources, such as polyester, nylon, polypropylene, viscose fiber, chitin fiber, microfiber, tencel, silk, bamboo fiber, wood pulp fiber, seaweed fiber, etc. [0003] Traditional spunlace nonwovens (commonly known as: spunlace nonwovens) use short fibers such as polyester, viscose or cotton as the main raw material, and the length of the fibers is between 38mm-40mm, which requires that the fibers have ...

Claims

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Application Information

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IPC IPC(8): C08F218/08C08F210/02C08F2/28C08F2/30C09J131/04C09J11/06D06M15/333D06M13/224
CPCC08F218/08C08F2/28C08F2/30C08K5/11C08K5/12C09J11/06C09J131/04D06M13/224D06M15/333
Inventor 虞夫潮
Owner JIANGSU AIKOP NEW MATERIALS CO LTD
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