JP2001258717A - Rental mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rental mat which is free of reverse pollution even if solution-dyed threads and dyed threads are washed in the same bath, SOLUTION: The rental mat is tufted with nylon pile threads. The nylon pile threads are solution-dyed threads and the amino-terminal content in the nylon is in the range of (0.5×10-5 to 2.0×10-5 mol/g).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rental carpet mat to be placed at an entrance of a store or the like and to prevent reverse contamination at the time of collection and washing.

[0002]

A foot-wiping mat using a pile of nylon-dyed yarn (in many cases, a stock solution with a dispersion colorant of 3 μm or less) has excellent dyeing fastness.
On the other hand, nylon pile yarn mats dyed with an acid dye, a gold-containing dye or the like are also used.

Many rental mats are usually reused by washing and reclaiming dirty mats at rental factories and laundry specialists. At the time of this washing, a mat having a pile of nylon-dyed yarn and a pile of nylon-dyed yarn are used. And is provided for washing, and is stained by the dye which has fallen off from the mat to be washed composed of the dyed yarn, and has a spillover effect on the hue change.

[0004] The reason that the reverse contamination of the dyed yarn is larger than that of the dyed yarn at the time of washing and regenerating the foot-wiping mat described above is that the dyed seat of amino group and the like is 100% free while the dyed yarn is dyed. This is due to the difference that many of the dyed seats in yarn are already occupied by dye. Therefore, when the mat composed of the dyed yarn and the mat composed of the dyed yarn are washed and reclaimed in the same bath, the degree of contamination by the dye falling off from the dyed yarn is much larger for the dyed yarn. It is.

When the rental mat is collected and washed at the same time as described above, the dye elutes into the washing water, and this dyes the amino terminal groups on the surface of the original yarn nylon, which causes recontamination. The degree of contamination of the original yarn and the dyed yarn is much greater for the original yarn, which is a major problem for the operation of the mat. However, the present invention has been made as a method for remarkably suppressing the reverse contamination during washing.

[0006]

2. Description of the Related Art In the case of dyed yarns, in order to suppress the contamination due to the loss of the dye into the washing liquid, in the case of dyed yarn, a dye having high washing fastness is selected, and after dyeing, a fixing agent (mostly tannic acid or a synthetic fixing agent) is used. Although measures have been taken such as treating the washing liquid and setting the pH (hydrogen ion concentration) of the washing liquid to a strong alkali region where it is difficult to dye nylon, there has been no effective means.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when a laundry professional collects and cleans a large number of contaminated rental mats, it is counter-contaminated with dyes eluted from the mats using dyed yarns. The purpose is to obtain a mat that has been prevented. The present invention relates to a mat in which a nylon pile yarn is tufted, wherein the nylon pile yarn is a soaked yarn and the amino terminal group content in nylon is 0.5 * 10 ^<-5 > to 2. * ⁵ .
The gist of the present invention is a rental mat characterized by being blocked at 0 * 10 ^-5 mol / g. The pile yarn is closed with a monocarboxylic acid. In the present invention, the soaked yarn is a raw colored yarn spun by mixing a nylon resin and a pigment in advance, and is used as a nylon BCF in a carpet mat.

The gist of the present invention lies in the mechanism for dyeing nylon. In other words, the nylon fiber adsorbs some hydrogen ions in the acid bath in a form bonded to amino groups, and then carries the same amount of dye ions into the fiber to maintain electrical neutrality. Have been done. As described above, it is said that amino groups in nylon molecules play a large role in dyeing nylon. In the case where the nylon fiber is dyed with an acid or gold-containing dye, the amino terminal group of the fiber and the sulfone group of the dye are bound by ionic bonds and dyed. Therefore, by reducing the content of the amino terminal group in the nylon fiber, the number of dyeing seats of the acid dye and the gold-containing dye can be reduced, and reverse contamination at the time of washing the rental mat of the present invention can be prevented.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The nylon in the present invention may be a general-purpose nylon such as nylon 6, nylon 66 or the like, but may be other nylons. In the present invention, a monocarboxylic acid such as acetic acid is added during the condensation polymerization of nylon. Depending on the amount of monocarboxylic acid added, the amount of amino-terminated dye seat in the nylon is changed, thereby preventing recontamination.

The condensation reaction of a monomer having an amino group on one side and a carboxylic acid on the other side results in a macromolecule in the case of equimolar amounts. At this time, by appropriately adding a monocarboxylic acid, the molecular weight becomes 70,000 to 80,000 and the degree of polymerization becomes lower. 200-3
00 can be appropriately adjusted.

When producing a nylon resin by condensation polymerization of polyamide, it is preferable to add acetic acid. It is preferable to add a ^monoacid, preferably a monocarboxylic acid, in an amount of 3.0 * 10 ^<-5 > or more. Depending on the amount added, the number of dyed seats of nylon is reduced, and the reverse contamination of the original nylon yarn is reduced.

(Function) A nylon-dipped mat and a dyed mat to be washed in the same bath are sealed with amino-terminated groups of nylon-dyed fibers, so that the amino-terminated groups in the nylon-dyed yarn are 2. A low concentration of 0 * 10 ^-5 mol / g or less prevents acid dyes and gold-containing dyes once released from the dyeing pile and eluted in the washing bath from back-contaminating the original yarn.

[0013]

Example (Example 1)

A nylon resin having untreated nylon 66 resin, which has been subjected to acetic acid treatment and has five stages of amino terminal groups a to e in Table 1, sealed with amino groups, is used as a raw material for the nylon pile of composition A in Table 2. The yarn was spun to give a native nylon yarn.

(Table 1) Amino group content 10 ⁻⁵ mol / g a. 1.61 b. 4.57 c. 4.76 d. 2.91 e. 4.60

(Table 2) (Composition A) Nylon Blue BD-243 (Cobalt Blue) 0.900% Nylon Black BD-270 (Carbon Black) 0.056% Titanium Oxide 0.300% Nylon Resin (Nylon Pile Raw Material) 98.744% The pigment components of blue, black and titanium oxide are manufactured by Dainippon Ink and Chemicals.

The obtained nylon BCF was dyed in a separate dyeing bath of Formulation B at 80 ° C. for 20 minutes to confirm dyeing. That is, in this dyeing test, it was evaluated that the larger the degree of dyeing, the greater the contamination of the mat during washing and regeneration.

(Formulation B) 0.01% SUPRANOL B.SKY BLUE BLW 0.10% acetic acid 0.01% KAYAYNOL M.SCARLET FGW 0.10% acetic acid 0.01% POLAR YELLOW 4G (160%) 0.10% acetic acid

As a result, the dyeing properties (staining properties) of the nylon raw materials are (c)>(e)>(b)>(d)>
(a). (Based on the visual judgment of 10 people). As a result, it can be seen that the dye having the smallest amino terminal group (a) has the least dyeing, and the degree of dyeing is proportional to the concentration of the amino terminal group. Particularly in the case of (a), there was no reverse contamination.

(Example 2) Two types of the original nylon BCF obtained in Example 1 were twisted at 210 times (S direction) and 210 times (Z direction) after twisting, and heat-set. 12
A tuft was applied to a primary nonwoven fabric of 0 g / m ^{2 according} to the standard shown in Table 3.

(Table 3) Gauge: 6.4 pieces / in Stitch: 7.8 pieces / in Pile length: 12 mm Pile weight: 720 g / m ²

The obtained greige was coated with 200 g / m ² of NBR latex as a sealant in a wet state, and then rubber-backed to obtain a rental mat. A washing test was performed with the foot wiping mat prepared as described above mixed with a mat using dyed yarn in the same bath by a laundry trader. In the washing test, a neutral detergent was used, and a cycle of washing for 40 minutes at a water temperature of 60 ° C. and drying for 30 minutes at 80 ° C. was repeated 20 times. The contaminated state of the mat after the test was visually evaluated by ten persons, and the superiority was determined.

As a result, the order of (c)>(e)>(b)>(d)> (a) is also in descending order of intense contamination,
The same tendency as in Example 1 was reproduced. That is, by using the yarn of (a) in which the amount of amino terminal groups was reduced, a mat free of reverse contamination was obtained.

As described above, in the present invention, the use of the dyed yarn nylon pile having an amino terminal group content of 2.0 * 10 ⁻⁵ mol / g or less allows the conventional rental mat to have a disadvantage in washing. Reverse contamination was eliminated.

[0025]

Even if the mat of the present invention is washed in the same bath as the mat using the dyed yarn, there is no reverse contamination of the original pile yarn of the mat of the present invention by the dye eluted from the dyed yarn. Was.

[Procedure amendment]

[Submission date] March 21, 2000 (200.3.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

When producing a nylon resin by condensation polymerization of polyamide, it is preferable to add acetic acid. The monoacid, preferably monocarboxylic acid, is 3.0 * 10 ^-5 mol /
g or more is preferably added, and the amount of dyed nylon seats decreases according to the amount of addition, and the reverse contamination of nylon-dyed yarn decreases.

Claims (2)

[Claims] 1. A mat made of tufted nylon pile yarns, wherein the nylon pile yarns are soaked yarns and the amino terminal group content in nylon is 0.5 * 10 ^{-5 to} 2.0 *.
A rental mat characterized by being blocked at 10 ^-5 mol / g. 2. The rental mat according to claim 1, wherein the amino terminal group in the nylon is blocked with a monocarboxylic acid.