JPH01223908A - Carpet made of polyamide fiber with antifouling property - Google Patents

Abstract

PURPOSE:To keep excellent yellowing resistance and light resistance by a process wherein pile yarn is made of a cation-dyable polyamide fiber, it is dyed with acid dyes, and it is treated with fluororesin. CONSTITUTION:Components of a titled carpet are necessary for satisfying a claim formula <I>. In the formula <I>, the amount of end-amino group (a) is 10eq/T and below, and the amount of sulfonate group (S) is 0.3mol.% and up. A cation-dyable polyamide fiber is made from a compound forming a polyamide and an aromatic compound containing a sulfonate group (showed in a claim structural formula <II>). The former is a copolymer such as nylon 6, nylon 66 and so on, or their blend, and, in the formula <II> of the latter, (X) is an identical or different functional grope (where R is alkylene group with one carbon to five, and R' is alkyl group with one carbon to five), (Z) is an aromatic base, (m, n) are the number of (1) or (2), and (M) is hydrogen. After that, the cation-dyable polyamid fiber is dyed with the acid dyes of metal complex (1:2 type) (where the pH of their solution is 7-8), and then water and oil repellent treatment is applied on the fiber by fluororesin.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polyamide carpet with excellent stain resistance. Specifically, the present invention relates to a method for producing a polyamide carpet that resists acidic dyes for food additives and has excellent yellowing resistance and light resistance.

<Prior art> As a method for preventing stains that occur when foods (or beverages) containing artificial coloring adhere to polyamide carpets and are left unattended, (1) ``Method of using nylon containing aromatic sulfonate groups in the polymer.'' (USP No. 4,579,762) (2) "Method of immersing in an aqueous solution of a condensed compound containing a sulfonate group" (USP No. 4,592,940), etc. are known. However, with the polymer modification method (1), the antifouling property is not satisfied in light and medium colors, probably due to the amount of terminal amino groups. The amount of terminal amino group is 10 eq/
If it is less than T, stain resistance can be obtained, but the colored hue of medium color or higher is insufficient and it cannot be used as a pile yarn. Next, when the method described in (2) is applied to pile yarns made of ordinary polymers that do not contain sulfonate groups, if treated with a treatment bath concentration that satisfies the stain resistance, yellowing and discoloration due to sunlight irradiation will occur. is remarkable. As described above, it is extremely difficult to obtain a carpet that can simultaneously satisfy stain resistance and discoloration resistance.

In view of the above circumstances, the present inventors have discovered that the present invention has good antifouling properties.
The present invention was developed as a result of studies aimed at providing a stain-resistant polyamide carpet that is less likely to change or fade.

<Configuration of the Invention> That is, the present invention provides the following features: [(1) In a carpet made of polyamide fibers,
1. A stain-resistant polyamide carpet, which is made of pile yarn or cationically dyeable polyamide fiber, dyed with a metal-containing 1:2 type acid dye, and treated with a fluorine-based resin.

(2) Terminal amino group content of cationic dyeable polyamide fiber (
A) is 10 eq/T or less, sulfonate group ffl
(S) is 0.3 mol% or more, and S and A are represented by the following formula (1
The stain-resistant polyamide carpet according to claim 1, which satisfies the following.

3>0.028×A+0.3...(1) (S is mol%, A is eq/T) J.

The cationically dyeable polyamide fiber of the present invention is formed from a polyamide-forming compound and a sulfonate group-containing aromatic compound, where the polyamide-forming compound is nylon 6, nylon 66, nylon 4. Nylon 7, Nylon 11. Nylon 610 or a copolymer or blend thereof.

On the other hand, the sulfonate group-containing aromatic compound has the general formula %RCOOR', the same or different functional groups selected from RNH2 (R is an alkylene group having 1 to 5 carbon atoms,
R' is an alkyl group having 1 to 5 carbon atoms), Z is an aromatic nucleus, m and n are numbers of 1 or 2, and M is hydrogen, an alkali metal, or an ammonium group. ]. Sulfonate group content is 0.1 to polyamide structural unit
in the range of 5.0 mol% and the terminal amino group amount is 10e
q/T or less is desirable.

Next, in order to dye the cationically dyeable polyamide fiber, a metal-containing 1:2 type acid dye is used, and the pH of the dye solution is 7 to 8. Dyeing is carried out using a normal dyeing machine using 0.2 to 1.0 g of a nonionic surfactant or anionic surfactant as a leveling aid.

Cationically dyeable polyamide fibers can be dyed with level dyeing type or milling type acid dyes other than metal-containing 1:2 type acid dyes.

Although it is possible to dye with disperse dyes, cationic dyes, etc., these dyes have weak binding strength, resulting in low fastness and dyeing rate of less than 1 hue area, making it impossible to obtain a satisfactory hue range. Cationically dyeable polyamide fibers dyed with metal-containing 1:2 type acid dyes have high color fastness and are resistant to stains caused by acid dyes for food additives. In addition, in order to prevent stains caused by Van der Waals bonds between food additive acid dyes and fibers that occur over time, as well as normal water-based and dry stains, water and oil repellency treatment is applied with a fluorine-based resin. The fluororesin treatment may be performed after dyeing or before dyeing, and the latter is more durable.

<Effect of the invention> Food additive colorants were introduced in Japan in the 4th year of the Showa era after the legal regulation.
At present, after a 47-year transition period, only the following water-soluble acid dyes are used.

Main colorants Azo dye: Sunset Yellow FCY (yellow) Tartrazine (yellow) Amaranth (red) Xanthine dye: Phloxine (red) Triphenylmethane dye: Brilliant Blue FCF (blue) F. Green FCF (green) Inagoid dye: . Indigo carmine (blue) Stains caused by these dyes are based on strong ionic bonds with polyamide fibers, making it difficult to remove stains, but the carpet of the present invention is inert to acid dyes. It is made of cationically dyeable polyamide fibers that do not form ionic bonds, and uses pile threads treated with fluororesin, so it is less susceptible to water-based and dry stains as well as stains caused by food additive colorants. Furthermore, since the dyed pile yarn is dyed with a metal-containing 1:2 type acid dye, the binding force between the fiber and the dye is strong and it has high fastness against light, moisture, and friction.

<Examples> Examples of the present invention will be described below. Evaluation of antifouling properties, etc. was performed using the following method.

Antifouling property (contamination) evaluation method FD&CRed #40. After immersing in an aqueous solution of 0.052 g/l, it is washed with water and dried. Measure the pile yarn color difference ΔF before and after treatment. 8E is 1.5 or less, passed.Fading (secondary light) evaluation method: 63℃, discoloration after 60 hours of irradiation is determined by international gray scale, 3.5 or above, passing Washing j6 fastness Marcel soap 5g /l, solution at 60'C, discoloration and fading after treatment for 30 minutes, judged by international gray scale, passed grade 3.5 or higher Examples 1 to 3. Comparative Examples 1 to 4 Cationic dyeable type polyamide crimped yarn (CB,
N-BCF terminal amino group i4.3eq/T, sulfonate group 0.46 mol%) 1ooo denier 68 filament and regular type polyamide crimped yarn for comparison (33, N-BC'F terminal amino group size 46,
1eQ/T, no sulfonate group) Double yarn processing (twist number 2507/250S, T/m) using 1ooo denier 68 filament) Heat set processing (
Spellper 32°c>b was tufted as pile yarn, and the tufted fabric was dyed (fixed) and water- and oil-repellent treated under the following conditions. The stain resistance and color change resistance of tufted carpet are as shown in Table 1, and the product of the present invention satisfies both stain resistance and color change resistance, but the comparative amount does not satisfy both performances at the same time or does not provide sufficient hue. I can't.

1) Tuft standard 178 inch gauge, 10 stitches (stitch/inch), pile height 12 mm, pile weight 1000! ;]/Trt?
) Dyeing Wince dyeing machine 9 Hue: Sax, 20 minutes in boiling state ■ Level dyeing type acid dye Te1on Red FRLL (BY) 0
．． 014%o, w, fTectilon Blue 6
G (200%) (CIBA) 0.06% o, w, f Acetic acid 2 g/l Migregal 2N (anionic) 2% o, w, f ■Metallic 1:2 type acid dye Er1onyl Blue M-RW O, 05%
o, w, f monobasic sodium phosphate 0.24 (1# 2nd 〃2.24(]/'1 Auolan 1w (nonionic) 2% o, w, f or Migre Girl 2N 2% o, w, f3) Fix treatment, 20 minutes in Wins dyeing machine 90'C E-7241
(Manufactured by Nicca Science Co., Ltd.) Treatment pH 4,0 4) Water and oil repellent finishing, spray method FC-393 (manufactured by Sumitomo 3M) 17c+/1° with i amount 4
14 g,/Trt Example 4. Comparative Examples 5 to 7 The same procedure as in Example 1 was carried out except that the terminal amino groups and the amount of sulfonate groups of the cationically dyeable type polyamide crimped yarn were changed as shown in Table 2. The evaluation results are shown in Table 2.

Dyeing recipe ■: Disperse dye Re5O1ine BltJe FBLo, 02%o,
w, f Acetic acid 1g/l Levapon 150 0.5 (J/1

Claims (2)

[Claims] (1) In a carpet made of polyamide fiber, the pile yarn is made of cationically dyeable polyamide fiber and contains metal 1
: A stain-resistant polyamide carpet that is dyed with type 2 acid dye and treated with fluorine resin. (2) Terminal amino group content of cationic dyeable polyamide fiber (
Claim (1), wherein A) is 10 eq/T or less, the sulfonate group amount (S) is 0.3 mol% or more, and S and A satisfy the following formula (1). Stain-resistant polyamide carpet. S>0.028×A+0.3...(1) (S is mol%, A is eq/T)