JPS5950769B2 - Automotive interior fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile interior fabric made of polyamide fibers.

Polyamide fibers not only have excellent strength, abrasion resistance, and easy care properties, but also have good dyeability and can produce deep, vivid colors, so they are used in a wide variety of applications, from clothing to interior decoration.

Recently, in addition to these uses, the fabric has been used for interior parts such as car seats and car mats, and is gaining popularity due to its breathability, soft texture, and durability.

However, although car seats and car mats are interior parts of automobiles, they are used in conditions where they are often exposed to sunlight and can reach extremely high temperatures (50 to 60°C), such as in midsummer. Compared to fabrics for clothing and interior decoration, the color of dyed products fades significantly.

These discolorations occur under unprecedentedly harsh conditions such as high temperatures and long periods of sunlight irradiation, so it cannot be solved simply by using dyes with good light fastness.

It is well known and industrialized that the reduction in strength and elongation of polyamide fibers caused by light can be prevented by adding heavy metal salts such as manganese, copper, chromium, nickel, and cobalt.

However, there is no knowledge as to whether a light-fastening agent for preventing fiber strength and elongation from decreasing due to light is effective in improving the light-fastness of dyes. Therefore, the present inventors have conducted research on improving the light-fastness of dyes. As a result of intensive research into both polyamide raw materials and dyeing processes, we have come up with an improved fabric for automotive interiors that can withstand harsh usage conditions such as car seats and car mats.

The present invention uses a copper compound of 10 to 11000 pp as Cu.
This fabric is made of polyamide fibers containing polyamide fibers, and is a fabric for automobile interiors that is dyed with a metal-containing complex dye.

That is, the present invention is characterized by containing a specific amount of a copper compound and dyeing with a metal-containing complex dye in order to improve the light color fastness of a polyamide fiber fabric for automobile interiors.

The copper compound of the present invention is contained in polyamide fibers as Cu.
If it is at least ppm, the desired improvement effect can be obtained.

If it is too small, the effect will not be achieved, but if it is too large, the polyamide will be colored and the hue of the dyed product will change when dyed, which is disadvantageous.

The appropriate amount, especially the upper limit, varies depending on the type of copper compound used and the target value.

Copper compounds generally develop a blue color when blended with polyamide, but the degree of this color varies considerably depending on the structure of the compound.

For example, when a copper salt of an inorganic or organic acid is used alone, the upper limit of its amount is low because these amine complex salts are highly colored.

Copper complex salts can be blended in large amounts because they have little coloring, but the limit is 11,000 pp due to changes in the hue of the dye.

Therefore, the proportion of CH in the copper compound is 10-11000
pp is appropriate.

Examples of copper compounds include inorganic acids or organic acid salts such as cuprous chloride, cupric chloride, cuprous bromide, cupric bromide, cuprous iodide, cupric iodide, copper sulfate, and phosphorus. Acid copper, copper borate, hydroxide steel, nitric acid steel, copper acetate, higher fatty acid steel such as lauric acid and stearic acid, aromatic carboxylic acid copper such as terephthalic acid, etc. are used, but these alone cannot be used as polyamide. Since it is unstable when melt-mixed and tends to be colored, it is not possible to mix it in a large amount.

Complex salts or combinations of copper salts and alkali rogens, organic amine complex salts such as ethylene diamino, hexylamine, benzylamine, xylylene diamine, complex salts with organic sulfur compounds such as mercaptobenzimidazole, phosphorous acid, phosphoric acid, It is desirable to use a phosphorus compound such as phosphinic acid in combination, since coloring can be significantly suppressed and the amount to be blended can be greatly increased, but the invention is not limited thereto.

The copper compound may be blended before or during the polymerization of the polyamide, or may be sprinkled onto the polyamide pellets before spinning.

Generally, dusting is carried out when polyamide pellets are drying.

When the copper compound and the third component are used together, they may be mixed together and then sprinkled, or they may be added separately.

Polyamides to which the present invention is effective include aliphatic polyamides such as nylon 6, nylon 12, nylon 66, and nylon 610, aromatic polyamides having xylylene diamine terephthalic acid in the main chain, hexahydroterephthalic acid, paraaminocyclohexylmethane, etc. Alicyclic polyamides having in the main chain, and copolymer polyamides of these polyamides,
It is a mixed polyamide.

In addition to the copper compound, additives to improve the properties of polyamide fibers, such as matting agents such as titanium oxide, light stabilizers such as manganese salts, antistatic agents, heat resistant agents, antioxidants, etc. may be added at the same time. .

In order to improve the effect, 2-hydroxybenzophenone type, benzotriazole type, phenyl salicylate type compounds, etc. can also be used in combination.

Automotive interior fabrics such as car seats or car mats are made by the following method.

The polyamide before or during polymerization or with a predetermined amount of copper compound and auxiliary compound added to the pellets is fed to a melt spinning machine such as an extruder spinning machine, and the molten polymer is passed through a spinneret pack having a predetermined number of spinning holes in a conventional manner. After being spun and solidified, it is wound up as filament yarn.

The polyamide may be pelletized once after polymerization and, if necessary, washed with water to remove unreacted monomers, etc., or may be fed to a melt spinning machine without being solidified after polymerization.

Further, the filament yarn may be drawn 3 to 4 times after cooling and then wound up, or the undrawn filament yarn may be wound up once and then drawn.

The obtained filament yarn is woven into a fabric such as tricot, round wire, or woven fabric according to a conventional method.

Alternatively, it may be a nonwoven fabric. The filament yarn used for knitting and weaving may be a textured yarn subjected to temporary twisting, pressing, fluid entangling, etc., or it may be used as a yarn-dyed yarn dyed with a dye suitable for automobile interior parts, as described below. You can.

Further, in knitting or weaving, other synthetic fibers, chemical fibers, natural fibers, etc. may be knitted or interwoven within a range that does not adversely affect the target light fastness.

Furthermore, the knitted and woven fabric may be subjected to a napping process, a special press process, or the like.

The thus obtained fabric for automobile interiors has much better light fastness when dyed with a metal-containing complex dye, compared to conventional nylon automobile interior fabrics that do not contain copper compounds.

In other words, it is possible to obtain a highly dyed and light-fast automobile interior fabric that has not been available up to now.

On the other hand, even if a light-fastening agent other than a copper compound, such as a manganese salt, is incorporated into polyamide fibers, the light-fastness to coloring does not improve.

Furthermore, in the fabric for automobile interiors of the present invention, dyes were selected from a wide range of dyes from the viewpoint of dyeing light resistance, and a group of dyes (metal-containing complex dyes) having good dyeing light resistance was selected.

Automotive interior fabrics of the present invention dyed with one or more dyes from the dye group selected herein exhibit significantly higher dyeing lightfastness than conventional nylon automotive interior fabrics.

As shown in the examples below, this effect is particularly noticeable at high temperatures.
It is noticeable over a long period of time.

The dye group (metal-containing complex dyes) that provides the highest color fastness to the automotive interior fabric of the present invention includes the following dyes.

Gold-containing complex dye Yellow series C, 1, AAcid Yellow
ow 1:16,155Orange //
Ac1d Orange 80.85,87,1
07,108Red series // Ac1d
Red 217, 251, 256, 271, 2
81Brown series // Ac1d Bro
wn 19y 226* 227,258# 29
4Blue series // Ac1d Blue
170,171 Black series // Ac1
d Black 131, 132 In addition, in dyeing the fabric of the present invention, other dyes such as acid dyes may be used in combination with the above-mentioned metal-containing complex dyes as long as they do not impede the color fastness to light.

Next, a method for evaluating light resistance will be described.

The test machine was FAL-3f manufactured by Suga Test Instruments Co., Ltd. (using a type fade meter, the temperature was 83°C and the temperature was 100.16°C for 1 hour).
After 0.200 hours of irradiation, the evaluation was based on a discoloration/fading gray scale and ranked from 1st grade to 5th grade.

The larger the number, the better the light resistance.

The fabric of the present invention is used as interior parts that are exposed to harsh sunlight and heat, such as car seats, car mats, rear parcels, etc., and can significantly reduce fading of dyes and maintain fresh colors for a long period of time. Can be done.

Example 1 Nylon 6 pellets containing no matting agent obtained by polymerizing ε-caprolactam as a raw material according to a conventional method,
After drying until the moisture content is 0.05% or less, 0.08% of the 1=1 complex salt of xylylene diamine and cupric iodide is added.
% by weight (156 pI as CU) m) was added in powder form and mixed well.

This pellet is fed to an extruder type melt spinning machine,
A filament yarn with a circular cross section of 70 denier 2.4 filaments was obtained by melt spinning.

The color of this filament was only slightly bluish, and was virtually indistinguishable from the unmodified filament yarn.

This filament yarn was warped and warp-knitted according to a conventional method to obtain a half IJ yarn.

The fabrics thus obtained were dyed with various dyes as shown below, and the results of determining the color fastness to light are shown in Table 1.

For comparison, the color fastness results for ordinary nylon yarn spun in exactly the same manner as above without adding a copper compound are also shown.

■Dye group 1 beige c, 1. A Acid Orange
80 0.05%owftt Ac1d
Yellow 129 0.03% 〃(Composition) // Ac1d Black 132 0
．． 03%〃2Gray C-1, AAcid Orang
e 80 0.02%ow ftt 1cAc
id Red 217 0.01% /
/ Ac1d Black 132 0
．． 18%〃3 Black C, 1, A, Ac1d B
Lack 131 0.1% o w f Dyeing method Dye, concentration Above Levelon CR// (Level dyeing agent made by Ichisha ■); 2% o
w f Ammonium sulfate; 3%〃 Bath ratio ``1:50 Temperature increase/retention from 30°C to 98°C in 30 minutes Appearance maintained for 30 minutes As is clear from Table 1, the light stabilizer of the present invention is blended, As shown in Table 1, when dyeing with the selected dyes, even under the harsh conditions of irradiation with ultraviolet rays at 85° C. for 200 hours, good fastness of grade 4 to 5 was exhibited.

On the other hand, in the case of fabrics made of unmodified nylon that does not contain a light-fastening agent, the light-fastness of the dye itself is grade 3 or lower even if it is good, which is not sufficient for practical use.

Example 2 Nylon 66 pellets containing 0.4% titanium oxide and 20 ppm manganese ions, obtained by polymerizing hexamethylene diammonium adipate according to a conventional method as a raw material, were treated with a water content of 0.05% or less. After drying until dry, add 0.04% of copper iodide and potassium iodide each.
It was added as a fine powder by weight.

The pellets were fed into an extruder and melt spun to obtain a filament yarn of 70 denier and 24 filaments.

This filament yarn was temporarily twisted in a conventional manner to obtain a textured yarn.

The textured yarn was knitted into a tricot with a raw modified filament yarn to obtain a pile tricot.

This material is refined and dyed in the usual way (using various dyes,
Using the same dyeing method as in Example 1), a fabric for car seats with good color fastness to light was obtained. The light fastness of the fabric was evaluated for various dyes. Table 2 shows the results.

For comparison, the evaluation results (comparative example) of a fabric obtained in exactly the same manner using ordinary nylon thread without the addition of copper iodide or potassium iodide are also shown.

Claims (1)

[Claims] 1. A fabric for automobile interiors, which is made of polyamide fiber containing 10 to 11,000 pp of copper compound as Cu, and is dyed with a metal-containing complex dye.