TH61376A - Processes for the production of absorbent materials. With a special absorbent that was polymerized in it - Google Patents

Abstract

DC60 (21/10/45) A process for the production of absorbent compounds, including absorbent fibers, special absorbent polymers, and selectively thermoplastic fibers and other mixtures, is provided. The synthesis (i.e., polymerization) of special absorbents is fully integrated into the process for the creation of specific absorbent compounds. Polymerization of special absorbents is initiated from within a certain number of absorbent and/or thermoplastic fibers, which are then formed into membranes. This integration process eliminates the need for the separate production of special absorbent polymers before the fiber and membrane formation processes. Furthermore, the resulting special absorbent polymers tend to disperse better and remain more firmly attached to the absorbent and/or thermoplastic fibers, providing a stable and uniform absorbent compound for various final applications. A process for the production of absorbent compounds, including absorbent fibers, special absorbent polymers, and selectively thermoplastic fibers and other mixtures, is provided. The synthesis (i.e., polymerization) of special absorbents is fully integrated into the process for the creation of specific absorbent compounds. Specifically, for absorbent compounds, the polymerization of the special absorbent material is initiated from within a number of absorbent and/or thermoplastic fibers, which are then formed into a membrane. This integration process eliminates the need for the separate production of the special absorbent polymer before the fiber and membrane formation processes. Furthermore, the resulting special absorbent polymer tends to disperse better and remain firmly attached to the absorbent and/or thermoplastic fibers, providing a stable and uniform absorbent compound for various final applications.

Claims (26)

1. The process for manufacturing composite non-woven membranes for absorption consists of the following steps: preparation of a precursor mixture of a special absorbent polymer; preparation of at least one stream carrying a certain number of hydrophilic fibers; combination of the precursor mixture of the special absorbent polymer with the streams carrying a certain number of hydrophilic fibers to create the mixture; chemical reaction of the precursor mixture of the special absorbent polymer to create special absorbent polymers within the mixture; deposition of the mixture on the forming surface; and formation of the composite non-woven membrane for absorption from the mixture. 2. The process of claim 1, which comprises the following steps: the arrangement of an initial gas stream carrying a precursor mixture of the first superabsorbent polymer; the arrangement of a second gas stream carrying a certain number of hydrophilic fibers; and the combination of the initial and second gas streams to create a combined stream carrying the mixture. 3. The process of claim 1, which includes the following steps: the provision of at least one initial gas stream carrying a certain amount of thermoplastic fibers; the provision of a second gas stream carrying a certain amount of hydrophilic fibers; the provision of a precursor mixture of special absorbent polymers in at least one of the initial and second gas streams; and the combination of the initial and second streams to create a combined stream containing the mixture. 4. The process of claim 1, which comprises the following steps: the arrangement of a second superabsorbent polymer precursor mixture; the arrangement of an initial gas stream carrying the first superabsorbent polymer precursor mixture; the arrangement of a second gas stream carrying a certain number of hydrophilic fibers and the second superabsorbent polymer precursor mixture; the combination of the initial and second gas streams to create a combined stream carrying the mixture; and the chemical reaction of the first superabsorbent polymer precursor mixture with the second superabsorbent polymer precursor mixture within the mixture. 5. The process for producing composite nonwoven membranes for absorption consists of the following steps: formation of the first number of thermoplastic fibers using an extruder; provision of the first initial gas stream, which carries the first number of thermoplastic fibers out of the extruder; provision of the first second initial gas stream, which carries the first number of absorbent fibers; combination of the first and second initial gas streams to create a composite stream consisting of a mixture of thermoplastic and absorbent fibers; provision of the first precursor mixture of superabsorbent polymer; chemical reaction of the precursor mixture of superabsorbent polymer to create the superabsorbent polymer within the mixture; deposition of the mixture onto the fabrication surface; and formation of the composite nonwoven membrane for absorption from the mixture. 6. The process of claim number 5, which includes the following steps: ; the creation of a second batch of thermoplastic filaments using a second extruder; ; the provision of a second initial gas stream which carries the second batch of thermoplastic filaments out of the extruder; and the combination of the second initial gas stream with the first initial gas stream and the second initial gas stream to create a combined stream consisting of the mixture. 7. The process of claim number 5, which includes the following steps: the provision of a second secondary gas stream carrying a second number of absorbent fibers; and the combination of the second primary gas stream with the first primary gas stream and the first secondary gas stream to create a combined stream consisting of the mixture. 8. The process of claim number 5, which includes the following steps: the provision of a second superabsorbent polymer precursor mixture; and the chemical reaction of the second superabsorbent polymer precursor with the first superabsorbent polymer precursor mixture within the mixture to create a superabsorbent polymer. 9. The process of claim number 5, which includes the addition of a precursor polymer mixture of special adsorbent type one into the initial gas stream. 10. The process of claim number 5, which includes the addition of a precursor polymer mixture of special absorbent type one into the second gas stream. 11. The process of claim number 5, which includes the addition of a precursor mixture of special absorbent polymers to the aggregate stream. 12. The process of claim number 5, in which thermoplastic filaments are made up of blown-melt fibers. 13. The process of claim number 5, in which thermoplastic fibers are composed of spunbond fibers. 14. The process of claim number 5, in which the absorbent fibers consist of cellulose fibers. 15. The process of claim number 5, in which the absorbent fibers consist of hydrophilic fibers. 16. The process of claim number 5, in which the absorbent fibers consist of short fibers. 17. The process of claim 5, in which the special adsorbent polymers are composed of polymers selected from alkali and ammonium metal salts of (poly)acrylic acid and (poly)methacrylic acid, poly(acrylamide), poly(vinyl ether), maleic anhydride copolymer with vinyl ether, and alpha-olefin, poly(vinyl pyrrolidone), poly(vinyl morpholone), poly(vinyl alcohol), and combinations of these. 18. The process for the production of composite non-woven membranes for absorption consists of the following steps: preparation of a precursor mixture of the first absorbent polymer, consisting of monomers; preparation of a precursor mixture of the second absorbent polymer, consisting of a polymerization initiator; preparation of at least one stream carrying a certain amount of cellulose fibers; combination of the precursor mixtures of the first and second absorbent polymers with cellulose fibers to form a mixture; chemical reaction of the precursor mixtures of the first and second absorbent polymers to form the absorbent polymers; deposition of the mixture onto a substrate for fabrication; and fabrication of the composite non-woven membrane for absorption from the mixture. 19. The process of claim 18, which includes the following steps: the provision of at least one stream carrying a certain amount of thermoplastic fibers; and the combination of thermoplastic fibers with a precursor mixture of the first and second superabsorbent polymers and cellulose fibers to form a mixture. 20. The process of claim 19, in which thermoplastic filaments are composed of melt-blown fibers. 21. The process of claim number 19, in which thermoplastic fibers are made up of spunbond fibers. 22. The process of claim 18, in which the polymerization initiator comprises a portion of the bridox system. 23. The process of claim 18, in which the monomers consist of compounds chosen from the group of unsaturated aliphatic monocarboxylic acids and their salts, methacrylic acids and their salts, unsaturated dicarboxylic acids and their salts, and combinations of these. 24. The process of claim 18, in which the monomers consist of compounds chosen from the group of acrylic acid and its salts, methacrylic acid and its salts, and the combination of these. 25. The process for manufacturing composite non-woven membranes for absorption consists of the following steps: arrangement of a precursor mixture of superabsorbent polymers; arrangement of at least one stream carrying a certain amount of cellulose fibers; combination of the precursor mixture of superabsorbent polymers with the streams carrying the cellulose fibers to form the mixture, while a chemical reaction occurs between the precursor mixture of superabsorbent polymers to create the superabsorbent polymer; deposition of the mixture onto the fabrication surface; and fabrication of the composite non-woven membrane for absorption from the mixture. 26. The process of claim 25, in which a chemical reaction begins in the enclosed space before the superabsorbent polymer precursor mixture is incorporated into the current carrying the cellulose fibers, and continues thereafter.