The thermal acrylic fiber developed and produced by Jilin Chemical Fiber Group and other companies has ignited the enthusiasm of downstream companies for light and thin thermal storage underwear. This is also a reflection of the consumer trend of upgrading clothing warmth in recent years. At the acrylic fiber series product link meeting led by Jilin Chemical Fiber Group, many downstream companies were optimistic about the prospects of this field. Thermal yarns blended with acrylic, polyester, viscose and other fibers are becoming a popular new material at home and abroad.
At the same time, some polyester and viscose manufacturers are also developing and upgrading their original products, striving to make breakthroughs in thermal performance. A wide variety of thermal insulation materials, starting from a variety of mechanisms, have a more satisfactory thermal insulation effect. Some of them not only retain warmth, but also have moisture absorption functions, making clothing an “air conditioner” for regulating temperature. These all condense fiber R&D personnel wisdom.
Traditional upgrade function is stable
The research and development space for thermal insulation materials is also very large. It not only achieves breakthroughs in new fields, but also achieves upgrades in original fields. For example, to replace down. Last year, Yizhen velvet products produced by Jiangsu Yizheng Chemical Fiber were officially launched on the market. Yizhen velvet products are proposed by downstream users, led by the synthetic fiber department of the Chemical Sales East China Branch, and jointly developed by Yizheng Chemical Fiber and Changshu Jinyu. It is mainly used for filling of high-end clothing and toys. The small pearl balls processed by special production technology have full particles, soft and smooth feel, and the quality is far better than ordinary pearl cotton products. After being filled with down, the product has good dispersion and superior thermal insulation effect, achieving the feel and replacement effect of natural down to a certain extent. The added value of this product is high, and the price per ton is several thousand yuan higher than similar hollow products of Yizheng Chemical Fiber Company.
Infrared heat storage fiber is also a good material for making warm textiles. Infrared heat storage fiber mainly uses it to absorb sunlight, light in the environment and the lifeline of the human body at any time to store heat, so as to achieve the purpose of keeping warm. Therefore, infrared heat storage and warmth are long-lasting, and there will be no hot and cold. Feels like, this is perfect for making warm clothing.
Corresponding to this is the hygroscopic and heat-generating fiber. The main principle of this fiber is to absorb water vapor in the gaseous state and turn it into a liquid state, thereby converting its kinetic energy into thermal energy to make the fabric heat. However, when the fabric is saturated with moisture, it is in a liquid state. When the water becomes gaseous and evaporates, it needs to absorb heat, which makes the fabric cool. Therefore, moisture absorption and heat generation itself is not a long-term heat generation process. In the specific spinning, weaving, dyeing and finishing process, attention should be paid to the damage of the phase change materials (microcapsules) of the hygroscopic and heat-generating fibers, and the temperature, time and frequency of dyeing and post-finishing should be reduced as much as possible, otherwise the phase change materials will be damaged. . In addition, moisture-absorbing and heating fabrics are not easy to store for a long time. During use, the number of phase changes of moisture absorption and evaporation must be reduced to reduce damage to phase-change materials.
New type of warmth and self-heating
In fact, the early thermal insulation and heating functional fibers were made by adding far-infrared emitting ceramic particles to the yarn. After post-processing, the ceramic particles were attached to the yarn to achieve the warmth-preserving effect. Unitika Fibers has newly upgraded this technology. The newly launched heat storage and moisturizing fiber material Thermotron can absorb sunlight and convert the absorbed light energy into heat energy. It also has the function of reflecting far-infrared rays emitted by the human body. Through “absorption-heat conversion” and “heat reflection mechanism”, the human body can obtain the required comfortable and warm temperature. Tiny particles of zirconium carbide are dissolved in the core of each single fiber, which emits heat under the action of solar heat and reflects far-infrared rays with longer wavelengths, warming the interior of the garment. When this fiber material came out, it was mainly used for ski clothing, and now it is attracting attention as the lining material of knitted products.
It is worth mentioning that some companies will also export��Or natural ores produced by volcanic eruptions are made into powder, and then added to the fabric fibers, which can produce far-infrared rays to keep warm. For example, Triumph’s fluffy thermal underwear adds natural mineral ingredients into the fiber. This product is characterized by its soft wearing feel and good warmth retention by absorbing far-infrared rays. In addition, the underwear uses micro-acrylic and fleece materials with fine fibers to achieve a soft and smooth wearing feel. This kind of underwear is made of fleece material, which makes people feel warm from the appearance.
Jilin Chemical Fiber Group strives for excellence in the research and development of thermal insulation materials. In cooperation with downstream companies, they creatively combine a variety of their own thermal insulation products, such as thermal storage acrylic + fine denier acrylic + modal, thermal storage acrylic + cotton + bamboo , Silkville + Tencel and other varieties, achieving a leap in thermal insulation effect.
Silkville is a phase change energy storage viscose fiber developed by Jilin Chemical Fiber. Shandong Yinying Chemical Fiber has also made a breakthrough in this technology. A company representative from Yinying Chemical Fiber believes that phase change energy storage viscose fiber transforms the traditional passive defense and heat preservation method into an active heat change and temperature regulation method, and importantly, does not consume other energy.
Generally speaking, there are two main ways to achieve thermal insulation performance requirements: one is to retain heat as much as possible, and the other is to obtain heat in some way. The warmth retention of textile clothing is affected by the following factors: fiber materials and yarns; yarn structure, fabric structure, weaving structure; post-processing, etc. When achieving the thermal insulation effect through fiber materials and yarns, the material is related to functional factors such as air content, skin touch, moisture absorption and dissipation, moisture absorption and heat generation, light absorption and heat generation, and far-infrared radiation. The more air contained in fiber materials and yarns, the better the insulation. The thickness of fabrics made from wool and cotton fiber materials is related to warmth retention. The thicker the fabric, the higher the warmth retention. Traditional thermal insulation mainly prevents the body from dissipating heat, while heating fiber is a new material that can heat and warm the body by itself, and its water absorption is far higher than other fiber types.
Globally popular health and environmental protection
In recent years, the international market has also been keen on new heating fiber products developed by Japan, Taiwan, China and other countries and regions. The important reason is that these products have a body-warming effect and water absorption far beyond other fibers. If the clothing worn in winter only focuses on thermal insulation performance and isolates the outside air, then people will feel very uncomfortable once they sweat during exercise. If the clothing you wear has good water-absorbing effect, consumers will feel more comfortable even if they sweat during exercise. This is also the fundamental reason why many consumers like cotton products, and why many chemical fiber companies strive to research and develop imitation cotton products.
From the beginning of the advent of heating fibers, most of the heating fibers such as EKS fiber and new Softwarm fiber were developed in Japan. The new Softwarm fiber processed and produced by Japanese companies combines special artificial wood pulp fiber and Toray’s ultra-fine denier fiber. Pilling acrylic fiber combines the advantages of heating, humidity control, warmth, and soft touch. The human body is breathing all the time and will emit slight moisture at any time. The new Softwarm fiber can absorb this moisture and convert it into heat energy through chemical reactions to achieve the heating function. The inherent double-layer gap between the ultra-fine denier anti-pilling heating acrylic fiber and the flat viscose cross-section in the new Softwarm fiber can prevent heat loss and achieve excellent thermal insulation effect. At the same time, due to capillary phenomenon, the new Softwarm fiber discharges excess moisture from the body, keeping the body dry and ensuring optimal wearing comfort. The new Softwarm fiber yarn can now reach count 64 and is suitable for the production of thermal underwear, scarves, sweaters, etc. in the field of warp knitting.
In addition, coffee fiber, which has become popular in recent years, has also been favored by the market. Coffee grounds are carbonized at ultra-high temperatures and turned into coffee carbon fiber. The underwear made can store heat and keep warm, and is more environmentally friendly. This kind of coffee carbon fabric is suitable for making heating underwear. Such underwear is naturally environmentally friendly and not easy to deform.
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