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Water-Soluble Sea-Island Fiber

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Water-Soluble Sea-Island Polyester Fiber
Water-Soluble Sea-Island Polyester Fiber
Water-Soluble Sea-Island Polyester Fiber

Water-Soluble Sea-Island Fiber

Water-Soluble Sea-Island Polyester Fiber

Water-soluble sea-island fiber is a special fiber material that combines the characteristics of water-soluble fiber and sea-island fiber. This fiber is usually composed of two different polymers, one of which (called the "island" phase) is dispersed in the fiber, while the other polymer (called the "sea" phase) is wrapped around the "island" phase as a continuous phase. The "island" phase of water-soluble sea-island fiber is usually polyester (PET) or polyamide (PA), while the "sea" phase is soluble modified polyester or other soluble polymers, such as polyvinyl alcohol (PVA). The reduction uses 95-degree hot water to dissolve the sea phase (polyvinyl alcohol) component in the fiber, leaving the island structure of the ultrafine fiber. During the entire water fiber opening (physical fiber opening, reduction) process, no chemicals are used. The water-soluble sea-island fiber reduction does not use any solvents containing chemical components. The reduction can be completed by soaking and squeezing in 95-degree hot water. Sea-island fiber is a composite fiber composed of two different polymers. One polymer (island) is distributed in another polymer (sea) in a finely dispersed state, forming a structure similar to an island in the sea. The fineness is extremely small, belonging to ultra-fine fiber. The fineness of single filament can reach 0.09D, which is a fineness that cannot be achieved by conventional spinning. Water-soluble sea-island fiber has developed some new fields, such as: high-end filtration products; leather regeneration products; wool spinning, cotton spinning and other accompanying spinning applications.

Product Details

5.0D×51mm
36 islands 30% sea phase 70% island phase
White Gray Black

 

Comparative Sheet on water,toluene&alkali reduction of sea island fiber

Production process
Parameter Water reduction sea island fiber Toluene reduction sea island fiber Alkali reduction sea island fiber
Material of the sea component Water - soluble polyvinyl alcohol (PVA) Toluene - soluble polymer (such as polystyrene PS) Alkali - soluble copolyesters (such as sulfonated polyester)
Dissolving method Disolved by soaking in hot  water at 95° C(no chemical solvents required) Dissolved with organic solvents such as toluene( a closed-loop recovery system required) Hydrolyzed with a strong alkali( NaOH)
Steps 1. Needle punching 1. Solvent soaking and dissolution 1. Soaking , hydrolysis in alkaline liquid
2. Hot water reduction treatment 2. Solvent recovery and fiber drying 2. Neutralization and washing
Fiber damage risks Low(physical dissolution,keeping the island components intact) Midium( solvents may remain, affecting the fiber surface) High(strong alkali corrodes the island components,concentration and time need to be controlled

 

Recycling process
process Water reduction sea island fiber Toluene reduction sea island fiber Alkali reduction sea island fiber
Sea component PVA can be biodegraded or extracted and reused (recovery rate 30-70%) Toluene needs to be recovered by distillation (recovery rate 85-90%) No direct recycling value
Island componet The polyester fibers are intact and can be directly reused solvents may remain in the fibers, requiring secondary cleaning The fiber surface is microporous, the mechanical properties decline
Facility required Conventional sewage treatment plants (COD control) Explosion-proof workshops+ VOCS adsorption devices Acid-base neutralization tanks, heavy-metal precipitation systems

 

Environmental Protection Facility Requirements
Indictors Water reduction sea island fiber Toluene reduction sea island fiber Alkali reduction sea island fiber
Pollutant types biodegradable PVA wastewater (COD 500 - 800mg/L) Toluene volatilization (VOCs emission limit ≤ 50mg/m³) Strong alkali waste liquid (pH > 12, containing Na⁺/SO₄²⁻, etc.)
Treatment difficulties Medium (requiring combined anaerobic - aerobic treatment) High (requiring activated carbon adsorption + catalytic combustion) High (requiring multi - stage neutralization + precipitation)
Carbon emissions  Low (no toxic gas emissions) High (carbon emissions during solvent production and recovery processes) Medium (carbon emissions during alkali solution production)
Regulatory compliance Complies with GB 4287 - 2012 "Discharge of Water Pollutants from Textile Dyeing and Finishing Industries" Needs to meet GB 31571 - 2015 "Pollutant Standards for the Petrochemical Industry" Needs to comply with GB 8978 - 1996 "Integrated Wastewater Discharge Standard"

 

Cost
Cost Water reduction sea island fiber Toluene reduction sea island fiber Alkali reduction sea island fiber
Equipment investment Low investment,conventional hot - water treatment equipment  High investment,  requires an explosion - proof solvent recovery system Medium - high investment, corrosion - resistant reactors 
Energy consumption High(energy consumption for hot water heating acounts for 40-50%)  Medium (high energy consumption for solvent distillation and recovery) Low (normal - temperature or low - temperature treatment)
Wastewater treatment Medium (needing to treat PVA - containing wastewater),PVA is recyclable and provide recyclable equipment High (VOCs treatment and solvent residue control) High (neutralization of strong alkali wastewater and heavy - metal treatment)

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ABOUT Hengqide

Ningbo Hengqide Chemical Fiber Technology Co., Ltd. is located in Qianwan New District, is specialized in the production of water-soluble island fiber science and technology innovation company. The company focuses on combining with the major strategic needs of the country, taking green production as its responsibility, aiming at the safety hazards and environmentally unfriendly pain points such as large emission of waste gas and waste in the follow-up production process of the current island fiber microfiber benzene reduction and alkali reduction, after nearly ten years of dedicated research and development, the company has remodeled the synthesis of microfiber materials and innovated the production process of microfiber leather. Successfully invented fully water-soluble island fiber. Water-soluble island fiber is currently the only technology in the world that uses pure water reduction to open the fiber, the production of fiber non-woven fabric uses water-based resin immersed in water coagulation process, with 95℃ hot water to complete the reduction process, which can effectively separate the island (polyvinyl alcohol) components in the fiber, from the fiber production to the bass process, without the use of any harmful chemicals. It does not produce substances that pollute the environment such as toluene, DMF, phthalic acid, etc., so as to recycle water resources and recycle PVA (Marine materials). At the same time, ensure that the physical properties of microfiber are intact after water reduction, and the color silk is more bright and bright, and the color fastness is better. This revolutionary technology truly realizes the full range of green coverage from raw materials to finished products, fully demonstrating the excellent practical quality and efficient environmental protection value of water-soluble island fiber. Ningbo Hengqide Chemical Fiber Technology Co., Ltd. has all the independent intellectual property rights of the invention, obtained five national invention patents and three utility model patents; At the same time, it won the "13th Five-Year" excellent science and technology Achievement Award of China Plastics Processing Association, and was included in the "14th five-year" frontier technology research, key common technology research and industrialization development and promotion of one of the important projects; To this end, the All-China Environmental Protection Federation and the Committee of Energy and Environment issued opinions on the promotion of green environmental protection products "Replacing chemical solvent island fiber with water-soluble island fiber". Ningbo Hengqide Chemical Fiber Technology Co., LTD., with a vigorous trend, brave to stand at the forefront, dare to be the first. Adhering to the concept of enterprise service to society, innovation and development, natural harmony, drawing cutting-edge wisdom, and gathering scientific and technological strength, we sincerely look forward to cooperating with the world's outstanding enterprises, pragmatically promote the wider application of water-soluble island microfiber in production, textile, leather, fashion and other fields, and create a better future of green environmental protection in the industry. To achieve a harmonious coexistence between man and nature through industrial upgrading and scientific and technological innovation. Look at the bay winds and clouds, hand in hand, strive ahead. Ningbo Hengqide Chemical Fiber Technology Co., Ltd. looks forward to working with you to create a green tomorrow and create a better future!

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