Impact test of textile flame retardant

Impact test of textile flame retardant

The influence of the flame retardant of textile fabrics is reviewed.

The dissolution of zinc-base nano-cotton fabrics in different sweat fluids can be explained by the chemical properties of zinc oxide and the same ion effect. ZnO is both amphoteric oxide and is sensitive to acid and alkali. The following reaction occurs in acidic media: the more acidic, the more intense the process. ZNAC was the lowest in the acidic sweat of pH 3, which proved the occurrence of the above reaction process.

In the alkaline medium, the following response occurs: in weak alkaline (e.g., pH, 8), ZnO is in a stable state or reaction (1); Alkaline enhancement, ZnO will react (2), solubility increases. ZNAC has high stability in the medium of pH 8, indicating that the reaction (2) did not occur. ZnO has acid-base effects, Zn2 +, Zn (OH) 2, [Zn (OH) 4] 2- ZnO and other zinc related components or ions and salt effects. The salt effect is a kind of the same ion effect, the higher the concentration of cationic ions in inorganic salt, the more inhibition of zn's dissolution. ZNAC has a very small dissolution rate of zinc in unsalted sweat, which is the contribution of salt effect.

In addition, the concentration of CO32- ion in the inorganic salt sweat is relatively large, and the following reaction occurs: the ZnCO3 of the insoluble substance is generated, and the zn 2+ is deposited on the fabric, which also decreases the apparent solubility of ZnO. Because human sweat is weak and alkaline, it has little effect on the dissolution of zinc oxide. Continuous washing method ", "a bath can be conveniently used in nano functional fabrics in different durability research of sweat, but need to point out is, because" a bath continuous process "than" more bath the intermittent method "is much milder conditions, so it is little different from the results of the two.

1) "a bath continuous washing method", cooperate with the atomic absorption spectrophotometric method to determine the zinc content in the water, feet by zinc half reduction time t1/2 appraisal zinc-base nanometer antibacterial cotton fabric in the artificial sweat durability is a kind of feasible new method.

(2) zinc base nano-cotton fabric has a poor acid resistance, and is less than 450min in t1/2. But salt tolerance and alkali resistance are strong, t1/2 is over 3000min; (3) zinc dissolution is consistent with the escape of zinc oxide nanoparticles on the fabric, which can be used as a basis and method to evaluate the durability and safety of nano fabrics.



Tert Benzyl diphenyl phosphate (BPDP-71B) Packing:

Net weight 200KG galvanized iron drum (a small cabinet to play with 16 tons), 1000KGIB barrel (a small cabinet installed 18 tons) or 23 tons ISOTANK.

Shipping port: Shanghai port

Price Quotations Valid: 15 days

Jincang time: 15 days (commodity inspection declaration)

Export authority: the company import and export right

Tert Benzyl diphenyl phosphate (BPDP-71B) use

Tert-butyl phosphate diphenyl phosphate, tert-butylated triphenyl phosphate is halogen-free organophosphorus flame retardant, using a new, excellent performance of phosphorus flame retardant, with excellent thermal stability and hydrolysis Sex. Its high thermal stability makes it as an engineering plastic flame retardant at the same time, can improve the plastic melting performance. Tert-butylated triphenyl phosphate for the liquid, in the resin can make its durability and hydrolysis stability is better, and easy to produce the table and stress cracking. It is widely used in flame retardant PV (, cellulose resin, into the rubber, phenolic resin, epoxy resin, polyene unit fiber.


The influence of flame retardant on the baking temperature of the test. Choose different baking temperature, the dosage of flame retardant is 6% and 12%, and the baking time is 2min. With the increase of baking temperature, the weight gain rate, the fixation rate, the LOI value and the number of flame increases correspondingly increased.

This is because as the temperature rises, the molecular chain of the amorphous region of the fiber is intense and produces the hole, the higher the temperature, the more intense the movement of the molecular chain. At the same time, the thermal movement speed of the flame retardant is accelerated as the temperature increases, and the flame retardants are easier to enter into the fiber and are fixed. When baking temperature of 200 ℃, has reached the maximum weight gain rate, to improve the effect of temperature is not obvious, this has to do with the LOI value and number of flame test results are very consistent. So sure baking temperature is 200 ℃.

Influence of flame retardants on the baking time of the test. When the baking time is too short, the molecules of the flame retardant can not fully enter the inner fiber and show the weight gain. However, the time is too long, not only the flame retardant performance is not improved, but the treatment of the fabric is yellowed and hardened. The best baking time is 1. 5-2. 0 min.

Effect of acid alkalinity of textile flame retardant on test. The original liquid of flame retardant is acidic and the acid alkalinity of the finishing liquid will affect the flame retardant effect. To this end, a different amount of phosphoric acid and dihydrogen phosphate are added, and the flame retardant effect is tested.

The higher the amount of phosphate, the lower the pH value of the finishing solution, the worse the flame retardant effect, which indicates that the high acidity will affect the stability of the flame retardant. And you add 0. 5 % hydrogen phosphate disodium, the finishing liquid pH value has reached 6. 5. All test indexes meet the requirements. Adding disodium hydrogen phosphate dosage, the pH value will reach more than 7, when curing temperature is close to 200 ℃ is easy to cause of polyester fiber damage and some not alkali resistance of disperse dye dyeing fabric color change. Therefore, when the flame retardant finishing, choose to add sodium hydrogen phosphate, the dosage is 0. 5%.

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