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Flame Retardant for Cotton

Ionic: weakly cationic in acidic solutions

PH value: 2.5-6.5

Solubility: easily soluble in water

  • JV-939




Composition: organic phosphonate compound

Appearance: colorless to slightly yellow liquid

Ionic: weakly cationic in acidic solutions

PH value: 2.5-6.5 (10% aqueous solution)

Solubility: easily soluble in water


This product is used for durable flame retardant finishing of cellulose fibers


1. It can endow pure cotton fabric with excellent combustion performance;

2. Can withstand at least 50 home machine washes, and the flame retardant effect still meets the GB/T17591-2006 B1 standard

3. Combined use with resin finishing agent gives cellulose fabrics excellent flame retardant and non-iron effects;

4. Does not contain flame retardant substances prohibited by Oeko-Tex Standard 100;

5. The finished fabric feels soft;

6. Small influence on the strength of the fabric;

7. Use conventional equipment for finishing and processing, which is easy to use.


Padding method is recommended for this flame retardant.

Reference recipe:

Reagent name


Flame retardant


Cross-linking agent


Strong protector




Phosphoric acid(85%)


Dosage of flame retardant: The amount depends on the type of fabric, gram weight, organizational structure, and the required flame retardant standards. 350-450g/L can meet general durability requirements. Usually, the amount of heavy fabrics is less than that of light and thin fabrics, and the amount of loose fabrics should be appropriately increased.

Dissolving material: After diluting the flame retardant with cold water, add it to the material tank and stir evenly. Add crosslinking agent, strong protective agent and penetrating agent as required. Finally, add catalyst phosphoric acid, add water to the specified volume, catalyst phosphoric acid is added last before finishing, and the finishing liquid must be mixed and stirred evenly. Available now.

Reference finishing process:

Two dipping and two rolling of cotton fabric (rolling rate 75-90%)→drying (110°C×2min)→baking (170°C×2min or 165°C×3min)→alkali washing (soda ash 30g/L, room temperature)→ Alkaline washing (soda ash 15g, 50-60°C) → hot water washing (50-60°C) → cold water washing → drying (90-100°C).



The cotton fabric to be finished should have good water absorption and no impurities such as alkali and pulp rod. It is recommended to use two dipping and two rolling to ensure that the fabric is fully saturated and rolled evenly. The liquid carrying rate is controlled at 75-90%.


After the fabric is padded with the flame retardant liquid, it should be dried slowly. Prevent the migration of additives and affect the flame retardant effect. The drying temperature is recommended to be set at 100-110 ℃, not more than 120 ℃. When drying, pay attention to control the moisture content of about 10%.

If infrared ray combined with dryer is used for drying after dipping, a lot of irritating odor will be produced around the dryer, and an exhaust hood should be installed for this. When the tenter setting machine is used, the irritating gas can be directly discharged, and the operating environment is better.


The baking conditions depend on the baking equipment, the thickness of the fabric and other factors. A slightly higher baking temperature can be selected for heavy fabrics, and a slightly lower baking temperature can be selected for light and thin fabrics. The baking temperature should not exceed 170℃.

The baking equipment can be a guide roller baking machine or a setting machine. The temperature control of the roaster is relatively stable and can be controlled within ±1°C. The temperature difference of the setting machine is larger than that of the baking machine, generally within ±5℃.

The best baking condition is 150℃×5min, which can ensure the reaction is moderate, the damage to the fiber is less, and the yellowing is not easy. If considering the production and economic benefits, the 165℃×3min baking process can also be used.

If there is no baking machine, it can also be baked with a setting machine, and a good ventilation device should be installed. The baking process at 165℃×3min or 170℃×2min can be used.


The flame retardant fabric should be neutralized and washed as soon as possible after baking, otherwise the residual phosphoric acid will have a negative impact on the overall performance of the fabric.

Washing can be carried out on a flat washer, taking an ordinary 10-tank flat washer as an example;

1) 20-30g/L of soda ash can be added to the front-end rolling groove;

2) 15-20g/L soda ash can be added to the first washing tank, and the temperature should be controlled at about 45-50℃;

3) The 2nd∽7th water washing tank can be heated to 80℃ one by one;

4) The temperature of the 8th tank is 40℃ (if necessary, 1-2g/L hydrogen peroxide can be added to the tank to remove odor);

5) The last tank is cold water;

6) Washing can also be carried out on a jigger. Because woven fabrics are prone to creases when washed on a rope washing machine, it is not recommended.

The washing time on the jigger is relatively long, usually:

1) Add 20-25g/L soda ash to channel 1∽4 to neutralize at 45-50℃;

2) Wash the 5th and 6th lanes with hot running water, 80-85℃;

3) Wash the 7th and 8th lanes with hot running water, 40-45℃;

4) Add 1-2g/L hydrogen peroxide to the ninth course at 40°C to remove odor (if necessary)

5) The last two washes with cold running water

6) After neutralizing and washing, the PH value of the fabric surface should remain weakly alkaline (PH 7-7.5)


Fabrics should be dried under low tension conditions.

Pay attention:

For safety reasons, a small sample test should be carried out before adding other non-matching finishing agents.

This product has varying degrees of influence on the shades of certain dyes, and a small test is required for finishing dyed fabrics.


Please put the product in a ventilated and closed container for 12 months


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