Powder dusted Spunlace Nonwoven Fabric Products
Product Description
As a dedicated player in the spunlace nonwoven fabric industry, Changshu Yongdeli Spunlace Nonwoven Fabric Co., Ltd. adheres to the core business philosophy of "Sustained Quality, Earned Trust, Benefit Customers", focusing on functional innovation based on mature spunlace technology to create "High-quality Spunlace Base Material + PVA Hot Melt Powder Directional dusting" powdered spunlace nonwoven fabric products. Through strict control of polyester and polypropylene base materials and refined upgrading of the PVA hot melt powder dusting process, we provide stable-performance and reliable-bonding solutions for the automotive and multiple other fields, helping customers break through product application boundaries and enhance their core market competitiveness.
I. Product Foundation: High-performance Spunlace Base Material, Laying a Solid Quality Foundation
The quality core of powdered spunlace nonwoven fabric begins with the meticulous creation of the spunlace base material. Our company selects polyester and polypropylene as core raw materials, through scientific proportioning and mature spunlace technology, to build a base material that combines strength, stability, and adaptability, providing an excellent carrier for the precise attachment and bonding function of PVA hot melt powder:
Polyester fibers: Endow the base material with excellent tensile strength and tear resistance, ensuring that the base material does not deform or break during powder dusting processing, cutting, and long-term use; at the same time, it has good chemical resistance and aging resistance, which can adapt to the complex environment of high and low temperatures and humidity in the automotive field, extending the overall service life of the product and ensuring the long-term stability of the bonding effect;
Polypropylene fibers: Possess excellent corrosion resistance and low moisture absorption, which can enhance the base material's moisture-proof and acid and alkali resistance capabilities, avoiding the impact of humid environments on the bonding performance of PVA hot melt powder; at the same time, its light weight and cost adaptability characteristics can balance product costs and usage requirements for customers while ensuring base material strength, suitable for cost-effective scenarios in the automotive and other fields.
After precise proportioning of the two raw materials, they are opened, carded, cross-laid, and then entangled by high-pressure water jets to form a uniform, dense, and stable spunlace base material. Each batch of base material undergoes multi-dimensional testing such as weight, thickness, and strength, with errors controlled within a very small range to ensure consistency and reliability, laying a solid foundation for the precise implementation of the subsequent PVA hot melt powder dusting process.
II. Core Process: "Spunlace Base Material + PVA Hot Melt Powder Dusting ", Endowing Products with Strong Bonding Function
Our dusted spunlace nonwoven fabric strictly follows the step-by-step process of "first preparing the spunlace base material, then performing powder dusting processing", customizing and optimizing the entire process parameters based on the characteristics of PVA hot melt powder, and achieving the triple guarantee of "stable base material + uniform powder dusting + strong bonding effect" through refined control, making the product perfectly suitable for bonding needs in the automotive and other fields:
(1) Spunlace Base Material Preparation: Customized to Match Bonding Scenarios
Relying on our automated spunlace production line, from raw material feeding to base material formation, the entire process is controllable, ensuring that the base material and PVA hot melt powder characteristics, application scenarios are highly matched:
Fiber proportioning stage: Precisely adjust the proportion of polyester and polypropylene according to customer needs - in the automotive field, where high temperature resistance and strength are required, the proportion of polyester is increased (e.g., 70% polyester + 30% polypropylene) to enhance the base material's aging resistance and tensile strength; in other general fields, the proportion of polypropylene can be appropriately increased to balance cost while ensuring basic performance;
Forming control stage: Through an online monitoring system, real-time tracking of web laying uniformity and high-pressure water jet pressure is conducted to ensure a flat base material surface and tight fiber entanglement, avoiding uneven powder dusting due to base material unevenness and ensuring the consistency of the subsequent PVA hot melt powder bonding effect from the source.
(2) PVA Hot Melt Powder Dusting Processing: Precise Control, Enhancing Bonding Performance Based on qualified spunlace base materials, customized powder dusting and fixation processes are implemented in accordance with the characteristics of PVA hot melt powder (polyvinyl alcohol hot melt powder), such as specific melting point, melt adhesion, and environmental friendliness and non-toxicity, to maximize its strong adhesive function:
Selection of powder dusting materials: High-purity PVA hot melt powder is selected to ensure no impurities remain, and it is environmentally friendly and non-toxic, meeting the environmental standards for automotive materials (such as VOC content compliance) and safety requirements in other fields. At the same time, PVA hot melt powder with a suitable melting point is chosen based on the customer's usage environment temperature (for example, models with a melting point of 120-140°C are selected for high-temperature automotive scenarios, and models with a melting point of 80-100°C are selected for normal temperature scenarios) to ensure stable adhesion effects.
Control of powder dusting accuracy: High-precision powder dusting machines are used. Considering the particle size (80-120 mesh) and fluidity of PVA hot melt powder, the powder conveying speed (adjustable from 5 to 8g/㎡), dusting width (customizable from 0.5 to 2m), and nozzle spacing are optimized. A vibration powder feeding device is also used to prevent powder accumulation. Meanwhile, an infrared detection system is equipped to monitor the powder spreading amount in real time, with an error controlled within ±2%, ensuring uniform distribution of PVA hot melt powder on the base material surface without local accumulation or missed dusting, and avoiding uneven adhesion.
Enhancement of fixation process: After powder dusting, a precisely temperature-controlled pressing production line (with a temperature matching the melting point of PVA hot melt powder, with an error of ±5°C) is used to quickly melt the powder and firmly bond it with the base material fibers. At the same time, moderate pressure (0.3-0.5MPa) is applied to ensure a strong bond. Subsequently, a cooling and shaping process is carried out to solidify the melted PVA hot melt powder into a stable adhesive layer, ensuring it does not fall off during subsequent processing (such as cutting and lamination) or long-term use, and maintaining effective adhesion performance.
Three. Product Advantages: Feature Adaptation to Demands, Empowering Multi-field Applications
With high-quality spunlace base materials and precise PVA hot melt powder dusting technology, our powder- dusting spunlace non-woven fabric has multiple core advantages, particularly in the automotive field, while also meeting the adhesion requirements of various scenarios:
Strong and stable adhesion: The adhesive layer formed by the melted PVA hot melt powder has high strength and is tightly bonded with the spunlace base material. In automotive applications, it can withstand long-term vibration and alternating high and low temperatures (-30°C to 80°C), and the adhesion points are not prone to cracking or falling off. In other fields, it also ensures long-term adhesion stability, avoiding frequent maintenance.
Excellent powder dusting uniformity: Through high-precision equipment and real-time monitoring, PVA hot melt powder is evenly distributed on the base material surface, with a consistent powder dusting amount per square centimeter, ensuring the same adhesion strength in any area of the product and no weak points, thereby enhancing the overall quality of downstream products.
Strong environmental adaptability: The spunlace base material's temperature resistance, corrosion resistance, and moisture resistance, combined with PVA hot melt powder with a suitable melting point, enable the product to adapt to high and low temperatures, humidity in the automotive field, as well as normal temperature, dry, or slightly humid conditions in other fields, without performance degradation.
Safe, environmentally friendly, and compliant: High-purity PVA hot melt powder is non-toxic, odorless, and environmentally degradable (for some models), and the spunlace base material also meets environmental standards, with no harmful component release, making it safe for use in automotive interiors, home building materials, and other scenarios where human contact or high environmental standards are required.
Four. Application Scenarios: Focusing on the Automotive Field, Radiating to Multi-industry Adhesion Demands
Our powder- dusting spunlace non-woven fabric, with the advantages of "strong base material + PVA hot melt powder's strong adhesion", focuses on the automotive field while also radiating to other industries, becoming an important support for customers' product adhesion upgrades:
Automotive field (core application): Interior component bonding: As a bonding carrier for automotive seats (fabric and foam), door panels (skin and substrate), and instrument panels (decorative layer and frame), PVA hot melt powder melts upon heating to generate strong adhesive force, achieving a tight fit between components. It has strong heat resistance and is unlikely to de-bond over long-term use. Moreover, it is environmentally friendly and non-toxic, meeting the requirements for in-car air quality.
Sound insulation material composite: By combining powder-dusted non-woven fabric with automotive sound insulation materials (such as sound-absorbing cotton and damping sheets), PVA hot melt powder can achieve a tight bond between the two, enhancing the adhesion of sound insulation materials to the vehicle body, reducing vibration noise, and improving the overall sound insulation effect of the vehicle.
Wire harness wrapping assistance: Used for the outer layer wrapping of automotive wire harnesses, PVA hot melt powder can fix the shape of the wire harness after bonding, preventing loose wires from rubbing and generating noise. Additionally, the base material has good aging resistance, suitable for high-temperature environments such as engine compartments.
Other applications (radiation applications):
Home building materials field: As a bonding substrate for wooden doors (wood veneer and substrate) and floors (decorative layer and substrate), PVA hot melt powder provides a strong and reliable bond after heating, and is environmentally friendly and non-toxic, suitable for indoor home environments.
Textile and home textiles field: Used for the composite bonding of curtains (fabric and blackout layer) and sofa covers (fabric and lining), it avoids the odor caused by using glue and provides sufficient adhesive strength for daily use. Some models can maintain a certain degree of adhesion even after washing.
Packaging field: As a bonding and fixing layer for fragile items (such as glassware and electronic components), PVA hot melt powder can fix the items to the packaging materials after heating, preventing damage from collisions during transportation. The environmentally friendly and degradable models can also reduce packaging waste pollution.
V. Brand Commitment: Perpetual Quality, Mutual Benefit and Win-Win
Since its establishment, Changshu Yongdeli Spunlaced Nonwoven Fabric Co., Ltd. has always regarded "perpetual quality" as the core of its development, integrating it throughout the entire production process of powder-dusted spunlace nonwoven fabric (polyester and polypropylene substrates, PVA hot melt powder sprinkled):
Raw material end: Strictly select suppliers of polyester and polypropylene fibers and PVA hot melt powder. Each batch of raw materials must provide quality inspection reports (such as PVA hot melt powder melting point test, purity test, substrate fiber strength test), and pass our company's re-inspection to ensure the safety and reliability of the source.
Production end: Equipped with professional quality inspection personnel and online detection equipment, real-time spot checks are conducted on key links such as substrate formation (thickness, strength), powder-dusting accuracy (powder amount, uniformity), and fixation effect (adhesive strength, heat resistance). For products in the automotive field, additional high and low temperature cycling tests and vibration tests are carried out to prevent substandard products from entering the market.
Service end: Provide customers with a full-process service from "demand communication - solution design (such as customizing substrate ratio and PVA hot melt powder melting point based on usage scenarios) - sample production - batch production - after-sales tracking". If customers have adjustment requirements for the bonding effect, the process parameters can be quickly optimized to ensure that the products always meet the actual application needs.
In the future, we will continue to be guided by "customer needs", deepen the innovation of PVA hot melt powder dusting technology in the automotive field (such as developing PVA hot melt powder solutions with higher heat resistance and stronger adhesive strength), and expand its application scenarios in new energy vehicles, high-end home furnishings, and other fields. We are committed to becoming a "reliable quality, precise customization, professional service" supplier in the powder-dusted spunlace nonwoven fabric field, and work hand in hand with customers to achieve the long-term development goal of "perpetual cooperation, mutual benefit and win-win".
