Method and equipment for conditioning and heat-setting textile articles

Abstract

A method of conditioning and heat-setting textile products in an autoclave (21) is disclosed comprising: two or more thermal cycles (C1, C2), at least one of which comprising a transfer phase (16) of water present in the autoclave (21) to inside a recovery tank (22), a suction phase (10, 12) to put the autoclave (21) under vacuum, a water return phase (14, 15) from the recovery tank (22) to the autoclave (21), a heating phase (11, 13) of water contained in the autoclave (21) to generate saturated steam, a stay phase (35, 36) in the autoclave (21) for a predetermined time (tc, tp) of the reached conditions of temperature (t11, t13) and pressure (p11, p13), restoring in the autoclave (21) the ambient pressure (Pa) at the end of the last stay phases (36). Each phase of transfer (16) and return (14, 15) of said water occurs spontaneously by suction produced by the difference of pressure existing between autoclave (21) and recovery tank (22).

Description

technical field [0001] The present invention relates to a treatment method for moisture conditioning and heat setting of textiles, especially yarns made of natural fibers such as wool or cotton or natural and synthetic fibres. The invention also relates to an apparatus for carrying out the conditioning and heat setting methods. Background technique [0002] It is well known that yarn wound on a tapered bobbin or bobbin must be subjected to absorbing a predetermined amount of moisture before being used on a loom or circular knitting machine. [0003] In fact, having the right percentage of moisture in the yarn will stabilize its twist and avoid breakage when working on a loom or knitting machine. [0004] Moreover, the correct range of yarn stability can also increase the working speed of the machine. [0005] In particular, in synthetic hybrid yarns, treatment at high temperature of the yarns can be carried out, and synthetic fibers can also be heat-set. [0006] Yarn tre...

AI Technical Summary

Problems solved by technology

[0031] However, such a method has some admitted disadvantages, mainly that after each steam cycle, air from the outside is fed into the autoclave and re-enters the interior of the material to be treated

[0032] It is clear that the air fraction entering the material will dilute the vapor input into the material and also create the same conditions on each subsequent cycle, resulting in an inefficient increase in the number of successive process cycles

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