JPS61275477A - Flame-proof processing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flame-retardant processing method for polyester/cellulose fiber blended knitted and knitted products which have excellent durability against washing and dry cleaning by post-processing.

Conventional methods for imparting flame retardant properties to fibers include making the polymer itself of synthetic fibers flame retardant or flame retardant, blending flame retardants at the fiber stage, and adding flame retardants to fibers during post-processing. Although there are methods such as '', there are still problems in terms of productivity, cost, etc. with methods of making the polymer itself flame retardant and methods of blending flame retardants. The most common post-processing method is to use a flame retardant containing phosphorus and halogen, and the products obtained by this method are
Temporary flame retardant performance is good, but at present there are no polyester/cellulose fiber blended knitted or knitted products that have flame retardant performance and excellent washing durability. Furthermore, in the case of polyester/cellulose blended knitted and woven products, it is said to be more difficult to impart flame retardant properties because there is no melt drop phenomenon of the polyester fibers during combustion, and the product becomes a source of combustion with a large amount of firepower.

The inventor of the present invention has conducted intensive research to create a flame-retardant product made of polyester/cellulose fiber blended knitted fabric with excellent flame-retardant performance and washing durability.As a result, the inventor has developed a method that does not impair the texture and has a simple production process. It has been found that a polyester/cellulose fiber blended knitted or knitted product having excellent flame retardant properties, washing durability, and dry cleaning durability can be obtained.

The present invention provides excellent flame retardant performance by using one or more of bromine-containing aromatic compounds, bromine-containing alicyclic compounds, and bromine-containing triazine ring compounds, tetrakis hydroxymethylphosphonium sulfide, and aminoblast compounds. This is an invention for producing polyester/cellulose fiber blended knitted and knitted products.

Furthermore, in order to improve washing resistance and dry cleaning resistance, a fixing resin such as a melamine type, an acrylic type, or an epoxy type may be blended, but the blended resin is not limited to these. However, these blended resins must be of a type that does not reduce the flame retardant performance.

100% for polyester/Cell-A's blended knitted and woven products.
Unlike polyester fiber, it does not have flame retardant properties based on the removal of combustion sources such as melt drops and shrinkage, so brominated alkyl phosphate, which is effective for 100 pieces of polyester fiber, is used as a flame retardant for polyester fiber. Even when used, no significant effect was observed, and the flame retardant effect was better when one or more of brominated aromatic, brominated alicyclic, and brominated triazine ring compounds were used. That is, when one or more of aromatic, alicyclic, and triazine ring compounds are exhausted and deposited on the bromine-containing compound, the weight of the tetrakis hydroxymethylphosphonium sulfide and aminoblast compounds that are subsequently deposited is It has very good adhesion to the polycondensate, but with bromine-containing compounds other than the bromine-containing compound, the adhesion to the polycondensate is not as good and the durability against washing and dry cleaning is poor. come. This is probably due to the affinity of both compounds.

Furthermore, after impregnating and adsorbing one or more of the above-mentioned bromine compounds, when a tetrakis hydroxymethylphosphonium compound and an aminoblast compound are applied, halides such as tetrakis hydroxymethylphosphonium chloride and tetrakis hydroxymethylphosphonium sulfide may be added. was more effective. Although the reason for this is not certain, it is thought that halides such as tetrakishydroxymethylphosphonium chloride compounds have some kind of adverse effect on bromine-containing compounds.

When tetrakis hydroxymethylphosphonium sulfide and an aminoblast compound are blended, the solution becomes acidic, but in order to stably react these two compounds, it is preferable to make the pH at least weakly acidic or neutral, and It is preferable to add an alkaline substance as this pH regulator.

There are no limitations on the method of applying these chemicals, but the method of applying bromine-containing compounds is as follows:
Recommended methods include exhaustion with the above-mentioned immersion liquid, application layer with a pad or spray, and fixing with dry heat for 180 to 2 minutes.

The following can be used as representative examples of this compound. First, as brominated aromatic compounds, B: none, HI OHI-04CH2・and HI-
Hnl is an integer of 1 to 5; m is an integer of 1 to 4; examples of the brominated alicyclic compound include; and examples of the brominated triazine ring compound.

The amount of this compound attached to the fibers varies depending on the mixing ratio of polyester/cellulose fibers, but may be 0.3 to 10% (o, w, f) in terms of bromine content. Especially 0.8
~3. A mixed solution of tetrakis hydroxymethylphosphonium sulfide and an aminoblast compound with good O% (o, w, f) is preferably applied to the fibers in a neutral bath in order to react in a stable state. After application, it is preferable to dry (100~b b ~b to form a reactive substance).

The amount of tetrakishydroxymethylphosphonium sulfide used is preferably 5 to 40% by weight, particularly 15 to 30% by weight.

As the aminoblast compound, at least one type of urea, ethylene urea, methylol urea, thiourea, or melamine can be used. The amount used is 1-2
0% by weight, preferably 5-10% by weight.

Any alkaline substance may be used as the pH regulator, but monobasic sodium phosphate, dibasic sodium phosphate, etc. are preferable from the viewpoint of flame retardant performance.

In this way, for polyester/cellulose fiber blended knitted and woven products, one or more of bromine-containing aromatic, bromine-containing alicyclic, and bromine-containing triazine ring compounds, tetrakis hydroxymethylphosphonium sulfide, and aminoblast A substance consisting of a compound, a fixing resin, and a PH regulator is applied in the same bath by a pad-cure method, or the bromine-containing compound is exhausted in an exhaustion bath at 100°C or higher, and then tetrakishydroxymethylphosphonium sulfide is added. It has been found that when a mixed solution of other additives is applied by the pad-cure method, a flame-retardant product with excellent washing resistance and dry cleaning resistance and a good texture can be obtained.

The present invention will be explained below according to Examples.

Examples and Comparative Examples Regular polyester processed yarn 65%/rayon 35%
Using a mixed woven curtain fabric, immerse and exhaust the seven types of chemicals shown below as brominated compounds at a bath ratio of 1:30 at 130°C for 60 minutes using s IP/'1, wash with water, and dry. layer, tetrakis hydroxymethylphosphonium sulfide 16 qb (o, w, f), thiourea 8%
(o, w, f), dibasic sodium phosphate 5% (o.

w-f), Sumitex Re5in M-62
Pad (o, w, f), dry (100℃ x
The following results were obtained for a flame-retardant product that was cured (150°C x 5 minutes).

The performance test was conducted using the JIS L-1091 method and A-1 microburner method. Washing method is JISL-10
The test was carried out 5 times using the medium temperature washer method of the 42 method and the F-2 method. Dry cleaning was performed five times using a wash cylinder according to JIS L-1018 method and E-2 method.

Based on the above results, one of the bromine-containing aromatic, alicyclic, and triazine ring compounds was exhausted, and a small amount of tetrakishydroxymethylphosphonium sulfide, aminoblast-based thiourea, and melamine resin as a fixing agent were added. When added, it exhibits excellent flame retardant performance and also has good durability against washing and dry cleaning. Further, when the bromine-containing alkylphosphorus compound is exhausted as in Comparative Example 9, it is difficult to obtain durable and durable flame retardant performance with the above-mentioned compound that is then attached. Furthermore, as in Comparative Example 10, when tetrakis hydroxymethylphosphonium chloride is used instead of tetrakis hydroxymethylphosphonium sulfide, Hexabromo-benzene
Performance deteriorates when used with

Claims (1)

[Claims] In the flame retardant treatment of blended, knitted and woven products of polyester fibers and cellulose fibers, use one of the following as a flame retardant: a bromine-containing aromatic compound, a bromine-containing alicyclic compound, or a bromine-containing triazine ring compound. A flameproofing method characterized by using the above, tetrakis hydroxymethylphosphonium sulfide, and an aminoblast compound.