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Water-Soluble Sea-Island Polyester Fiber Wholesale

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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.

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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)

The products we offer

Water-Soluble Sea-Island Polyester Fiber

Water-Soluble Sea-Island Polyester Fiber
Water-Soluble Island-In-Sea Nylon Fiber

Water-Soluble Island-In-Sea Nylon Fiber
Ningbo Hengqide Chemical Fiber Technology Co., Ltd.

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.
As China Water-Soluble Sea-Island Polyester Fiber Manufacturers and Water-Soluble Sea-Island Polyester Fiber Factory, 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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Industry Knowledge

Understanding the Unique Structure and Properties of Water-Soluble Sea-Island Polyester Fiber

Introduction to Water-Soluble Sea-Island Polyester Fiber: Key Characteristics and Benefits

Water-Soluble Sea-Island Polyester Fiber (WSSIPF) represents a groundbreaking material in the field of polymer science and textile manufacturing. As industries move towards more sustainable and innovative materials, WSSIPF has garnered attention due to its unique properties, especially its ability to dissolve in water under controlled conditions. This article explores the key characteristics, underlying mechanisms, and benefits of WSSIPF, shedding light on why it has become such an essential component in eco-friendly product development across various industries.

The Basic Structure of Water-Soluble Sea-Island Polyester Fiber

At its core, Water-Soluble Sea-Island Polyester Fiber is a type of fiber that consists of a sea-island structure. In this structure, the "sea" refers to the polymer matrix, which is generally a hydrophobic polymer such as polyester, while the "island" refers to the water-soluble material embedded within the matrix. The sea and island components are typically arranged in a way that allows the fiber to maintain mechanical strength until exposure to water. When exposed to water, the water-soluble "island" component begins to dissolve, leaving behind a skeletal structure composed of the hydrophobic polyester "sea." This dissolution process is carefully engineered to allow the fiber to break down at a controlled rate, ensuring it meets the specific needs of applications such as biodegradable textiles or dissolvable packaging materials. The polymer matrix and soluble island are typically engineered to balance the fiber’s strength, flexibility, and water solubility. The key to the success of WSSIPF lies in the ability to control the dissolution rate of the island, which allows for tailored functionality in different applications. The water-soluble part of the fiber can be made from various materials, including polyvinyl alcohol (PVA) or cellulose derivatives, which are chosen based on their compatibility with the polyester matrix and the intended use of the fiber.

The Key Properties of Water-Soluble Sea-Island Polyester Fiber

1. Water-Solubility

The most defining characteristic of Water-Soluble Sea-Island Polyester Fiber is its ability to dissolve in water. The water-soluble component of the fiber is engineered to react with water at a specific temperature, pH, and time period. This controlled solubility is beneficial in various applications where temporary support or structural integrity is needed, but where the material must eventually break down in the presence of water. The solubility of the island component can be adjusted through the polymer composition and the ratio of water-soluble to hydrophobic materials. For example, fibers designed for use in medical textiles or water-based filtration materials will have an island that dissolves at a specific rate when exposed to liquid, leaving behind a residue-free, eco-friendly material.

2. Durability Before Dissolution

Before dissolving in water, Water-Soluble Sea-Island Polyester Fiber is remarkably durable and robust. The polyester matrix provides strength and resistance to mechanical stress, enabling the fiber to withstand various manufacturing processes, including weaving, knitting, and dyeing, without compromising its structural integrity. This durability ensures that the fiber can maintain its functionality for the duration of its intended use before breaking down. For textiles, this durability allows the fiber to maintain its appearance and performance under normal wear and tear. Whether used in clothing, upholstery, or industrial materials, WSSIPF exhibits excellent strength and flexibility, offering a balance between the flexibility typical of polyester and the specialized properties provided by the water-soluble component.

3. Biodegradability

One of the most appealing features of Water-Soluble Sea-Island Polyester Fiber is its inherent biodegradability. As the island portion of the fiber dissolves in water, it breaks down into harmless byproducts that can be safely absorbed by the environment. This characteristic makes WSSIPF an excellent choice for applications where end-of-life environmental impact is a concern, such as in medical products, single-use packaging, or disposable textiles. The biodegradability of WSSIPF depends on the solubility of the island component, which can be further modified by adjusting the chemical composition of the fiber. This means that WSSIPF can be tailored for use in a variety of end-products, ensuring that they break down in an environmentally responsible way after use, contributing to the reduction of plastic waste in landfills and oceans.

4. Water Resistance of the Polyester Matrix

While the island component of the fiber is designed to dissolve in water, the polyester matrix that makes up the "sea" portion remains highly resistant to water. This means that WSSIPF can maintain its structural integrity in wet environments, making it suitable for a wide range of applications where exposure to moisture is expected, such as in outdoor fabrics, marine textiles, or hygiene products. This water resistance is particularly important in maintaining the longevity of the fiber’s use during the initial phase of its life cycle. It prevents premature dissolution of the island component, ensuring that the material remains intact and performs as required until it is exposed to the right conditions for breakdown.

5. Customizability of Dissolution Rate

Another notable property of Water-Soluble Sea-Island Polyester Fiber is the ability to adjust the dissolution rate of the island component. Through careful control of the polymer blend and the processing conditions, manufacturers can customize how quickly the fiber dissolves in water. This control is vital for tailoring WSSIPF to specific applications that require gradual or rapid dissolution. For example, in medical applications such as dissolvable sutures or wound dressings, the dissolution rate must be carefully controlled to match the healing process. Similarly, in packaging, the fiber’s dissolution rate can be adjusted to ensure that the material breaks down at a pace that aligns with environmental conditions or consumer needs.

The Benefits of Water-Soluble Sea-Island Polyester Fiber

1. Sustainability

WSSIPF presents a significant advancement in the push for more sustainable materials in the textile and packaging industries. Its water-solubility allows for complete breakdown without leaving harmful residues, reducing the environmental impact of products made with this material. This is especially important in a world grappling with the growing issue of plastic pollution, as WSSIPF offers a viable alternative to traditional non-biodegradable plastics. By using WSSIPF in products that are designed to be single-use or temporary, companies can contribute to a circular economy model where materials are consumed, then safely disposed of or recycled in a sustainable manner. This makes WSSIPF an excellent material for industries seeking to meet stricter environmental regulations and sustainability goals.

2. Functional Versatility

Water-Soluble Sea-Island Polyester Fiber’s ability to dissolve under controlled conditions means it can be used in a variety of specialized applications. For instance, it can be incorporated into medical products like bandages or sutures that need to dissolve naturally after performing their function. Similarly, it can be used in agricultural applications where it decomposes after a set period, leaving no harmful residue in the soil. The fiber's ability to resist water while maintaining strength makes it suitable for use in environments exposed to moisture without the risk of premature dissolution. The adaptability of WSSIPF allows it to be utilized in a wide range of industries, from textiles and healthcare to packaging and agriculture.

3. Enhanced Comfort in Textiles

In the textile industry, the unique properties of Water-Soluble Sea-Island Polyester Fiber can enhance the comfort and wearability of fabrics. The polyester matrix provides flexibility and smoothness, contributing to a soft handfeel, while the dissolution of the island component can also contribute to lighter weight and breathability in the fabric. These characteristics are particularly valued in applications such as performance wear, sportswear, and other comfort-oriented textiles. The dissolvable component can even be engineered to enhance the overall texture of fabrics by improving softness or drapability. This makes WSSIPF an ideal candidate for advanced textile designs where both performance and comfort are key priorities.

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