Routine finishing of flame retardant cloth
Classification:
flame retardant fabric
1. Fixed width
Pull the width of Flame-retardant fabric to the standard size to correct the uneven width, weft skew, aurora, etc. that occur during the printing and dyeing process of the fabric. shortcoming. The tentering process is based on the fabric containing appropriate moisture, using mechanical clamps to gradually widen the edge of the fabric, and slowly drying it to obtain a temporary shape. The width of the fabric before and after tentering should be limited, otherwise it will cause Severe shrinkage.
1. Hot air tenter
Main structure: It consists of cloth feeding frame, rolling car, weft straightening device, drying cylinder, hot air drying and cloth dropping frame.
Pad car: two-roller or three-roller, used for rolling water or padding finishing agent; some are also equipped with high-pressure water spray or jet moistening device.
Hot air drying room: including stretching mechanism and heating air supply device
Stretching mechanism: cloth clip chain, amplitude modulating screw
Heating device: cold air is sent to the heater through the blower – main air duct, branch air duct – hot air nozzle – spray cloth surface
Weft straightening device: differential gear (at the cloth outlet end of the reverse stretching mechanism) or guide roller type (after the locomotive)
Process: cloth feeding – dehumidification (padding) – whole width – drying – tenter
Advantages: wide application range, high tenter efficiency, fast vehicle speed, and good working conditions
2. Needle tenter
The basic structure is the same as 1. The difference is that a needle plate is used instead of cloth clips, and it has an overfeeding feature, which is beneficial to elongation, reduces warp shrinkage, and can be used for heat setting of synthetic fiber fabrics and baking processes for resin finishing.
3. Dual-purpose needle plate tenter
The upper part is equipped with a short-ring hanging pre-drying room, and flame-retardant cloth is placed before tenter; the warp and weft directions are pre-dried under tension-free conditions. It is suitable for tenter finishing of medium-length fabrics, knitted fabrics, and resin finishing that require loose processing. It can also be used for loose pre-drying, heat setting, and hot-melt dyeing of synthetic fiber blended fabrics. It has strong adaptability and flexibility.
2. Calendering, electro-optical and embossing
1. Calendering:
(1) Principle: Cotton fiber has a certain degree of plasticity under hot and humid conditions. After a certain temperature and moisture, under mechanical pressure, the yarn is flattened, the fluff is suppressed, and the fabric becomes smooth and bright. Improved gloss.
(2) Calender:
It consists of overlapping soft and hard rollers (2-7). The fabric passes through several rollers and acquires luster due to the action of wet and hot pressure. The calendering effect is related to the moisture content, pressure between the rolls, roll temperature, and the number of passed rolling points.
(1) Laminated calendering: Several layers of fabric pass through the same calendering point at the same time, and the fabrics are rolled against each other to produce a ripple effect, which can obtain a soft feel and clear texture, and is suitable for poplin.
(2) Friction calendering: There are three soft and hard rollers. The soft and hard rollers have different linear speeds, and the hard roller (friction roller) rotates at a high speed, causing the fabric to be rubbed when passing through and obtain a strong luster (imitation wax paper gloss).
2. Electric light
(1) Principle: similar to calendering
The surface of the fabric is pressed with many parallel slashes through a hard roller engraved with parallel slashes, which adjusts the ratio of light diffusion and directional reflection, resulting in a bright luster and a silky feel.
(2) Electro-optical machine: two rollers, one hard and one soft. The hard roller is made of steel, hollow, and heatable, with slashes engraved on the surface. The soft roller is a heat-resistant paper meal roller.
(3) During processing, the pressure, temperature, fabric moisture content and angle of the oblique line on the roller surface must be appropriately selected to avoid loss of strength and uneven color.
Henan has 15 years of mature flame-retardant fabric production experience and 10 years of European and American sales experience. It specializes in the production of flame-retardant fabrics | flame-retardant cloth | cotton flame-retardant fabrics | CVC flame-retardant fabrics | cotton brocade flame-retardant fabrics | Manufacturer of functional fabrics such as acid and alkali resistant fabrics | anti-UV fabrics | anti-mosquito fabrics, consultation phone number: E-mail:
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