Flame retardant air textured yarn
Flame retardant air textured yarn
Air textured yarn, also known as air-jet textured yarn, is a new type of textile yarn. The morphological structure of air-variable yarn includes surface structure and yarn core structure. Air texturized yarn is used in various fields of the textile industry.
Air textured yarn is a new type of textile yarn. The filaments in the air-conditioned yarn are densely arranged and intertwined with each other, so the yarn structure is tight, and the various sizes of loops and arcs randomly distributed on the surface of the yarn give the air-conditioned yarn an appearance similar to staple fiber yarn, that is, short Fiberized yarn.
Concept: Flame-retardant fiber is spun from flame-retardant chips added with flame retardant. Nowadays, phosphorus-based flame retardants are mainly used. Flame-retardant air deformation yarn uses compressed air to cause the filaments of chemical fibers to undergo jet deformation, and the outer ring of the filament bundle will curl up locally. , and then partially break it, forming a number of ends exposed to the outside, which looks very close to being spun with short fibers according to conventional methods, and the air-textured yarn is obtained.
The morphological structure of air-variable yarn includes two parts: surface structure and yarn core structure. Many researchers have measured and analyzed the surface structure of air-variable yarn (including the size, shape and distribution of loops, etc.) and proposed various theoretical models.
In 1969, Wray proposed the surface characteristic parameters of air-variable yarns, such as the size of the loops, and then introduced the formula for loop frequency and the initial surface morphology structure model of air-variable yarns, which was proposed by Piller and Lesykova in 1982. An ideal space-changing yarn model. The proposal of this model provides a more vivid morphological structure of air-variable yarn, that is, a filament yarn composed of a compact yarn core and loose loops of various sizes, and has the characteristics of short fiber yarn in appearance. This model does not conduct a detailed analysis of the yarn core structure. It only believes that the filaments in the yarn core are basically parallel and straight.
In 1984, Hu Qiyong systematically tested and analyzed the surface structure of air variable yarn, and classified arc circles into three basic forms: intersection loop, arch loop and arc. The statistical results show that the proportions of the three types of arc circles are: intersection circles 45%, arch circles 30%, and arcs 25%. The geometric model of the space-variable yarn proposed by Hu is given, which shows that the surface of the space-variable yarn has three different forms of arc circles and their respective heights and widths.
The j-winding structure of the yarn that serves as the skeleton of the air-to-air variable yarn has not been analyzed in detail before, but it is simply considered that the single filaments in the core part of the yarn are basically parallel and straight. In fact, the yarn core structure of air variable yarn is very complex and affected by many factors.
There are significant differences between the three curves of the stretch curves of staple fiber yarn, airborne yarn and their fed raw yarns. Staple fiber yarn, air-variable yarn and its feed raw yarn are made of polyester fibers with the same linear density. Generally, the strength of untextured yarn is higher than that of air-textured yarn and staple fiber yarn. However, air deformation processing does not cause any damage to the individual filaments themselves. The decrease in yarn strength after deformation processing is the result of loop formation and entanglement between single filaments.
During the production of flame-retardant air textured yarn, the production process of cutting short chemical fiber filaments and spinning them into long yarns is omitted. Fabrics woven from it have an appearance and feel similar to fabrics woven from short fibers, and are also hygroscopic. It can be used to produce silk-like, cotton-like or wool-like fabrics.
Flame retardant fiber product characteristics
1. Good safety. The fiber does not melt when exposed to fire, and the smoke is low and does not release toxic gases.
2. Permanent flame retardant effect. Washing and rubbing will not affect the flame retardant performance.
3. Environmental protection. Using natural cellulose fiber as the carrier, the waste can be naturally degraded and meets environmental protection requirements.
4. Excellent permanent flame retardant and fireproof performance. It has good performance in preventing flame spread, smoke release, melt resistance and durability.
5. Good thermal insulation and anti-static properties. Provides comprehensive thermal protection.
6. It has natural fiber properties. The fabric has the moisture absorption and release properties of natural fibers. The fabric has the characteristics of soft feel, comfort, breathability, and bright dyeing.
Flame-retardant air textured yarn generally requires a phosphorus content of more than 6000ppm. Its main feature is that fiber products only smolder in the flame, and the smoldering extinguishes itself when leaving the flame. It is mainly used for protective clothing, home decoration materials such as sofa cloth, curtain cloth, etc. .
Application
The application range and end-use of airborne yarns are usually determined by their structure and properties. Due to the previously mentioned versatility of the air texturing process and its yarns, air texturing yarns can be used in various areas of the textile industry.
Nylon air-sprayed yarn suitable for woven fabrics
Nylon air-conditioned yarn used to make ski jackets is the first market for air-conditioned yarn used as weft yarn for woven fabrics. Since the loops adjacent to the surface of the yarn are bonded to each other, unwinding is difficult and cannot be used as warp yarn without sizing or twisting. Nowadays, these limitations no longer exist. For example, using fine denier yarn or combining different filaments can solve the above problems.
Polyester air-spun yarn suitable for automotive supplies
As far as car interiors are concerned, seat covers, seat backs, inner door panels and inner roof panels can all be made of polyester airborne yarn. Car seats are constantly exposed to heat, strong sunlight, and a lot of wear and tear. Polyester air textured yarn can meet the above requirements.
Polypropylene air-sprayed yarn suitable for decorative fabrics
Air-textured yarns used as decorative materials are mostly made by spinning-drafting process.Therefore, there is no need to go through drafting before deformation processing. Multiple yarns can be placed on the creel at the same time, such as 5 or 6 single yarns, so a single yarn break or defect detection device must be installed. The feed yarn is usually melt dyed yarn.
The monofilament linear density of polypropylene air-variable yarn used as decorative fabric is 4.4~6.7dtex. Since the overfeeding rate of skin yarn is very high, linting or snagging phenomena are prone to occur. Therefore, it is advisable to use a tapered bobbin for winding.
Polyester air-spun yarn suitable for sewing thread
Used as sewing thread, it is a very special application field of polyester air textured yarn. Air-variable yarn not only has high tensile strength, but also has excellent wear resistance. Due to the surface loop structure of the air-textured yarn, the sewing thread can be processed at a speed higher than 6,000 stitches/main without melting or breakage. 1uFwpdkUy
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