KR-20260062309-A - Nonwoven Sheathcore composite fiber for filter using a Fiber finish

Abstract

The present invention relates to a composite fiber with a sheath core, wherein the sheath is a polyethylene (PE) resin and the core is a polypropylene (PP) resin, and the composite fiber with the sheath core is treated with an emulsion containing a lubricant, a surfactant, and an additive during the stretching process of the composite fiber. The lubricant is at least one of mineral oil, fatty acid ester, polyhydric alcohol, and EO/PO copolymer. The surfactant is any one of nonionic, anionic, cationic, or amphoteric surfactants. The nonionic surfactant is at least one of fatty acid monoglycerin ester, fatty acid polyglycol ester, fatty acid sorbitan ester, fatty acid sucrose ester, fatty acid alkanolamide, and condensed polyethylene glycol. The anionic surfactant is at least one of carboxylate, sulfonate, sulfate ester, phosphate ester, and phosphonate. The cationic surfactant is at least one of amine salt and quaternary ammonium salt. The present invention relates to a nonwoven sheet core composite fiber for filters using a stretching agent characterized in that the above-mentioned amphoteric surfactant is a substance containing a carboxyl group or a sulfonate group as an anion and a quaternary ammonium as a cation, and the above-mentioned additive is at least one of formic acid, maleic acid, citric acid, acetic acid, oxalic acid, and lactic acid.

Inventors

• 김남훈
• 권오혁
• 김동은

Assignees

• 주식회사 휴비스

Dates

Publication Date

20260507

Application Date

20241029

Claims (2)

1. In the composite fibers of the syscore part, The sheath is made of polyethylene (PE) resin, and The core is polypropylene (PP) resin, and The above-mentioned syscore part is treated with an emulsion containing a lubricant, a surfactant, and an additive during the composite fiber stretching process. The above lubricant is at least one of mineral oil, fatty acid ester, polyhydric alcohol, and EO/PO copolymer. The above surfactant is any one of a nonionic, anionic, cationic, or amphoteric surfactant, wherein The above nonionic surfactant is at least one of fatty acid monoglycerin ester, fatty acid polyglycol ester, fatty acid sorbitan ester, fatty acid sucrose ester, fatty acid alkanolamide, and condensed polyethylene glycol, and The above anionic surfactant is at least one of carboxylates, sulfonates, sulfate esters, phosphate esters, and phosphonates. The above cationic surfactant is at least one of an amine salt and a quaternary ammonium salt, and The above-mentioned amphoteric surfactant is a substance containing a carboxyl group or a sulfonate group as an anion and a quaternary ammonium group as a cation, and A nonwoven sheet core composite fiber for filters using a stretching agent characterized by having at least one of formic acid, maleic acid, citric acid, acetic acid, oxalic acid, and lactic acid as the above additive.
2. In paragraph 1, A nonwoven sheet core composite fiber for filters using a stretching agent, characterized in that the above-mentioned polyethylene (PE) is one or more mixtures selected from high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), polypropylene, and ethylene-propylene copolymer.

Description

Nonwoven Sheathcore composite fiber for filter using a fiber finish The present invention relates to a sheath-core composite fiber using a stretching agent, and more specifically, to a sheath-core composite fiber using a stretching agent containing a lubricant, a surfactant (nonionic, anionic, cationic, amphoteric), and an additive. In the manufacture of heat-bonded composite fiber nonwoven fabrics used in filter production, the use of an emulsion is unavoidable for processability purposes, such as antistatic properties, smoothness, and cohesion. The emulsions used in the textile manufacturing process generally consist of surfactants and other components. Surfactants are used in various fields of industry by activating the interfaces of the same or different phases to help them mix or adsorb. Surfactants are used in anionic, cationic, amphoteric, and nonionic forms depending on their ionic nature. The content of the lubricant in the fiber is minimized to improve filter efficiency during electrostatic charging, and additives are used to compensate for the deterioration in processability caused by the low lubricant content. The present invention relates to a method for manufacturing a heat-bondable composite fiber for a filter nonwoven fabric that is excellent in terms of antistatic properties, leveling properties, and cohesive properties. Preferred embodiments of the present invention will be described in detail below. First, in describing the present invention, specific descriptions of related known functions or configurations are omitted to avoid obscuring the essence of the invention. Terms of degree used herein, such as ‘approximately’ and ‘substantially,’ are used to mean at or near the stated value when inherent manufacturing and material tolerances are presented in the stated meaning, and are used to prevent unscrupulous infringers from unfairly exploiting the disclosed content in which precise or absolute values are mentioned to aid in understanding the invention. The present invention relates to a composite fiber of a sheath core, wherein the sheath is a polyethylene (PE) resin and the core is a polypropylene (PP) resin, and the composite fiber of the sheath core is treated with an emulsion containing a lubricant, a surfactant, and an additive during the stretching process. The use of stretching agents is for basic processability such as antistatic properties, smoothness, and cohesion, and in particular, stretching agents play an important role in expressing the characteristics of staple fibers. When manufacturing Ciscore composite fibers, the use of stretching agents imparts functionalities such as hydrophilicity and hydrophobicity. The emulsion used in the manufacturing process of syscore composite fibers consists of surfactants and other components, and surfactants are used throughout the industry to activate the interfaces of the same or different phases to help them mix or adsorb. Ciscore composite fibers consist of base oil (lubricant), surfactants (nonionic, anionic, cationic, amphoteric), and additives. The base oil acts as a lubricant and contributes to physical properties such as friction, adhesion, and heat resistance. Mineral oil, fatty acid ester, polyhydric alcohol ester, EO/PO copolymer, etc., may be used. Non-ionic surfactants contribute to physical properties such as emulsion stability and friction, and fatty acid monoglycerin esters, fatty acid polyglycol esters, fatty acid sorbitan esters, fatty acid sucrose esters, fatty acid alkanolamides, condensed polyethylene glycol, etc. may be used. Anionic surfactants contribute to physical properties such as antistatic and hydrophilicity, and carboxylates, sulfonates, sulfate esters, phosphate esters, phosphonates, etc. may be used. Cationic surfactants contribute to physical properties such as softening and antistatic properties, and amine salts, quaternary ammonium salts, etc., may be used. Amphoteric surfactants are in a form in which anions and cations are mixed, and they contribute to physical properties such as antistatic properties. They may contain carboxyl groups, sulfonate groups, etc. as anions and quaternary ammonium groups, etc. as cations. In addition, various additives can be used for functionalities such as viscosity, pH, corrosion resistance, rust prevention, and preservative properties. Hydrophilicity of short fibers can be imparted when using 0~40% nonionic surfactants, 40~90% ionic surfactants, and 0~30% functional additives. The emulsion is prepared by diluting and stirring to a suitable concentration (1–10%) and temperature (room temperature–60℃) depending on the active content and characteristics of the components of the emulsion. When formic acid, maleic acid, citric acid, acetic acid, oxalic acid, lactic acid, etc. are used as additives, there are no compatibility issues due to their high water solubility; however, when attached to the fiber surface, they exhibit weak adhesion and tend to detach or evaporate due t