Dongguan Donghong PP Yarn: Quality is jointly forged by raw materials and craftsmanship!

In the diverse world of chemical fiber materials, PP Yarn, with its unique properties and wide range of applications, has become an important basic material in many industries. Dongguan Donghong New Materials Co., Ltd. has been deeply engaged in the production of PP yarn. With strict control over raw materials and advanced production techniques, it presents products of outstanding quality to the market.

PP yarn is mainly made of polypropylene, which is polymerized from propylene and is a thermoplastic resin. Its raw material sources are extensive, and petroleum, natural gas, etc. can all be used as basic raw materials, which endows PP yarn with a significant cost advantage. Dongguan Donghong New Materials Co., Ltd. carefully selects high-quality polypropylene raw materials to ensure their regular molecular structure and stable performance, laying a solid foundation for the production of high-quality PP yarn.

The PP yarn production of Dongguan Donghong New Materials Co., Ltd. adopts the mature melt spinning method. First, the carefully selected polypropylene raw materials are put into a high-temperature environment to make them melt rapidly. During this process, the temperature is precisely controlled, generally maintained above the melting point of polypropylene, approximately 160-170 °C, to ensure that the raw materials are fully melted without any adverse reactions such as decomposition. Subsequently, the molten polypropylene is extruded through a specially designed spinneret, forming extremely fine melt streams. The design and manufacture of the spinneret are extremely precise. The size, shape and distribution of its spinneret holes directly determine the uniformity and quality of the melt fine flow. Dongguan Donghong ensures the high precision of the spinneret through advanced processing technology, making the thickness of the melt fine flow consistent.

The fine melt stream extruded from the spinneret rapidly enters the cooling zone, and air cooling (dry spinning) is usually adopted. The temperature, flow rate and other conditions of the cooling air have a significant impact on the structure and performance of fibers. Dongguan Donghong precisely regulates the cooling parameters to rapidly cool and solidify the melt fine flow, forming solid primary fibers. At this point, the fiber structure is initially stable. The strength and performance of the nascent fibers are relatively low, and they need to undergo stretching treatment. The company uses multiple stretching rollers to stretch the nascent fibers under specific temperatures and tensions, with the stretching ratio generally controlled at 3 to 10 times. The stretching process prompts the macromolecular chains in the fibers to align along the axial direction of the fibers, significantly enhancing key properties such as fiber strength, modulus and wear resistance, and endowing PP Yarn with better mechanical properties.

To make multiple stretched fibers closely aggregate and form a yarn with a stable structure, twisting operation is required. Dongguan Donghong uses professional twisting equipment such as ring spinning frames and doubling machines to twist fiber bundles. By adjusting the twist, different uses and performance requirements can be met. Different twists endow yarns with various hand feels, strengths and appearances. After twisting, the yarn may have internal stress. To eliminate internal stress, stabilize the structure and size, and improve dimensional stability and elastic recovery, heat setting treatment is required. At a certain temperature below the melting point of polypropylene, such as 120-130 °C, and under appropriate tension conditions, the yarn is heated, and the macromolecular chains relax and rearrange, reaching a stable state.

After the above-mentioned meticulous processes, the PP yarn produced by Dongguan Donghong New Materials Co., Ltd. has outstanding performance. It is light in texture, with a density of only about 0.91g/cm³, which is much lower than that of most common fibers. However, it has good tensile strength and can withstand considerable tensile force. It is suitable for products that are sensitive to weight and require a certain strength, such as bag straps and hand straps. PP yarn has excellent wear resistance. Even in frequent friction environments, it can still maintain structural integrity and extend the service life of products. It is extremely suitable for making industrial ropes, labor protection supplies, etc. It also has excellent acid and alkali resistance, and can be stably used in corrosive environments such as acids and alkalis. It plays an important role in the production of filter materials and protective fabrics in fields such as chemical engineering and agriculture. In addition, PP yarn has extremely low moisture absorption, with a moisture regain rate close to 0%. It features quick drying and no shrinkage. The fabric made from it can dry rapidly and is less likely to deform due to moisture absorption. It is widely used in outdoor products, sports equipment and other fields.

With these excellent properties, the PP yarn of Dongguan Donghong is widely used. In the luggage industry, it is used to make various luggage straps, inner edges, etc. Due to its light weight, low cost, durability and environmental friendliness, it is highly favored. In the field of safety protection equipment, PP yarn webbing is often used for motor vehicle helmet straps, seat belts, etc., to ensure the safety of users. In terms of sports and fitness equipment, as belts, safety belts, power belts, etc., they provide reliable support for sports enthusiasts.

Dongguan Donghong New Materials Co., Ltd. provides high-performance products to the market by continuously optimizing the production process of PP yarn and strictly controlling product quality, promoting the application and development of PP yarn in multiple fields, and occupying an important position in the chemical fiber materials industry.