Polyester Oxford cloth flame retardant finishing process flow

Polyester Oxford cloth flame retardant finishing process
The thickness of the scraper is selected to reduce the shear force of the coating and the penetration of the Oxford fabric, so boiling dyeing is selected. Temperature becomes the dominant factor in dyeing. The energy of the dye molecules in the dye solution increases, and the diffusion and dyeing ability is enhanced. At the same time, the dye has been dyed in The dye molecules on the fiber further penetrate into the interior of the fiber or migrate; after boiling for 30 minutes, the dye concentration in the dye solution and on the fiber no longer changes, the dyeing reaches a dynamic balance, and the dye uptake rate is basically constant. For dyeing with a large liquor ratio (such as the liquor ratio of 1:50 in 1), due to the relatively low dye concentration in the dye bath, the dye uptake rate will continue to increase with time, and will basically not change after 60 minutes of boiling dyeing. And the final equilibrium dye uptake rate is lower for dyeing with smaller liquor ratio.

In the experiment on the influence of color-fixing agents, the effects of PF cationic color-fixing agent and darkening and brightening agent APA series on the dyeing effect were simultaneously investigated. Since acid dyes are generally anionic dyes, when using PF, it should be added at the later stage of dyeing to avoid uneven dyeing. It is difficult to control when using PF color fixing agent, and slight color blooming may occasionally occur, especially when using anionic leveling agent PR-C, this phenomenon is more obvious. When using the APA series of darkening and brightening agents to fix the color, the leveling properties are very good and the complexion is darker and more ideal. 4 Conclusion (1) For a single type of acid dye, the optimal dyeing formula for island-type ammonia-brominated composite microfiber synthetic leather is as follows: dye/% (owf 2 ~ 4 (light color) 4 ~ 6 (dark color) leveling agent /g·L-10.5 (non-ionic) color fixing agent/g·L-12.0 (amphophilic) liquor ratio 1:15～1:20 dyeing temperature/℃98 dyeing time/min60pH value 4.0～5.0 (2) ultra-fine In fiber dyeing, because the base fabric is thick and the fibers are tightly woven, in order to ensure color fastness, it is necessary to strengthen washing to fully remove the floating color (free dye molecules) on and inside the base fabric.

(3) The island-type microfiber has two components (PA and PU) after fiber opening, so it is difficult to achieve the ideal color fastness, level dyeing, dyeing through and color depth with a single type of dye. , be sure to consider using different types of dyes for mixed dyeing in the experiment, in order to achieve the best results. A knife with a large arc is helpful in reducing silver bleed. At the same time, the amount of coating applied to the fabric can be increased.

2.5.4 Selection of flame retardants The selection of flame retardants must take into account both the flame retardant effect and the peel strength. DJ-508 has good flame retardant effect, but it is oily, and excessive dosage will affect the peel strength of the fabric surface. Therefore, it is best to mix powdery flame retardant with DJ-508, which can not only improve the flame retardant effect, but also not affect the intrinsic performance of the fabric. 2.5.5 Solvent selection Since powdered flame retardant is used, it is best to use methyl ethyl ketone (MEK) with better solubility to dissolve and soak the flame retardant, and can be combined with cheaper toluene (TOL). The temperature should reach 160°C during baking to fully evaporate the solvent and leave no residue on the fabric. 2.5.6 Quality control of the coated surface In order to prevent silver powder from falling off during the coating process of the fabric, viscoelastic substances such as polyacrylate can be appropriately added to the top coating PU material.

They can increase the resilience of the silver slurry in the direction of the knife edge, causing it to stick to the knife edge, thus preventing the silver slurry particles from falling on the cloth surface. 3 Conclusion (1) The composite finishing process of polyester Oxford fabric with UV protection, flame retardant and silver powder is not only a simple combination of several finishing processes, but also requires comprehensive consideration of the influence of various factors and various properties, including color fastness and light fastness. Excellent results are obtained in terms of fastness, washing fastness, flame retardant effect, UV protection effect, water staining and water resistance. (2) Choose the flame retardant DJ-508 and the phosphorus nitrogen flame retardant to work together to take into account the flame retardant effect and peel strength. (3) The dosage of UV-531 anti-ultraviolet finishing agent is 25%, which is economical and can achieve the desired effect. (4) In order to improve the effect of silver powder coating, comprehensive considerations need to be taken from the selection of solvent, silver powder particle size, knife edge thickness and regulator. A knife with a large arc is helpful in reducing silver bleed. At the same time, the amount of coating applied to the fabric can be increased. 2.5.4 Selection of flame retardants The selection of flame retardants must take into account both the flame retardant effect and the peel strength. DJ-508 has good flame retardant effect, but it is oily, and excessive dosage will affect the peel strength of the fabric surface. Therefore, it is best to mix powdery flame retardant with DJ-508, which can not only improve the flame retardant effect, but also not affect the intrinsic performance of the fabric.

2.5.5 Solvent selection Since powdered flame retardant is used, it is best to use methyl ethyl ketone (MEK) with better solubility to dissolve and soak the flame retardant, and can be combined with cheaper toluene (TOL). The temperature should reach 160°C during baking to fully evaporate the solvent and leave no residue on the fabric. 2.5.6 Quality control of the coated surface In order to prevent silver powder from falling off during the coating process of the fabric, viscoelastic substances such as polyacrylate can be appropriately added to the top coating PU material. They can increase the resilience of the silver slurry in the direction of the knife edge, causing it to stick to the knife edge, thus preventing the silver slurry particles from falling on the cloth surface.

Conclusion (1) The composite finishing process of polyester Oxford fabric with UV protection, flame retardant and silver powder is not only a simple combination of several finishing processes, but also requires comprehensive consideration of the influence of various factors and various properties, in terms of color fastness and light fastness. Excellent results have been obtained in terms of strength, washing fastness, flame retardant effect, UV protection effect, water resistance, and water resistance. (2) Choose the flame retardant DJ-508 and the phosphorus nitrogen flame retardant to work together to take into account the flame retardant effect and peel strength. (3) The dosage of UV-531 anti-ultraviolet finishing agent is 25%, which is economical and can achieve the desired effect. (4) In order to improve the effect of silver powder coating, it is necessary to consider the selection of solvent, silver powder particle size, knife edge thickness and regulator, etc.�Taking all things into consideration. mjeUCcTD

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