JPH03234870A - Water-repellent and stain-resistant web - Google Patents

Abstract

PURPOSE:To provide a web having both durable water repellency and stain resistance by treating a synthetic fiber web with a highly fluorine-containing water and ail-repelling agent and subsequently with a low fluorine-containing polymer. CONSTITUTION:A synthetic fiber web comprising polyester fibers, etc., is treated with an emulsion of a water and oil-repelling agent having a fluorine content of 50wt.% (preferably a poly(meth)acrylate ester containing perfluoroalkyl groups, etc.) and subsequently treated with a organic solvent solution of a polymer (e.g. tetrafluoroethylene.vinyl ether copolymer) having fluorine atoms bonded to the carbon atoms of the main chain thereof in a fluorine content of 20-50wt.% to provide a water-repelling and stain-resisting web having both durable water repellency and stain resistance. The web is suitable as a material for car seats, car mats, interiors, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a synthetic fiber fabric having water repellency and stain resistance, and more specifically to car seats, ceiling materials, door trims,
This invention relates to various vehicle interior materials including car mats and other interior materials for vehicles; durable synthetic fiber fabrics that have excellent water repellency and stain resistance and are suitable for interior materials such as carpets and upholstery. .

[Conventional technology]

As a method of imparting antifouling properties such as water repellency and oil repellency to synthetic fiber products, particularly car seats, carpets, etc., there is a method of blending or copolymerizing a fluorine-based antifouling agent compound with a fiber-forming polymer and spinning it. Treatment methods for threads have been proposed, including a method in which a fluorine-based antifouling agent compound is fixed to the yarn immediately after fiber formation, and a method in which a fluorine-based antifouling agent compound is applied together with an oil agent and heat-treated in the process after spinning until drawing. ing.

However, in either method, the number of brands of yarn increases, which poses a major management problem.

Therefore, post-processing (processing) of products is considered to be optimal in order to quickly respond to high-mix, low-volume production of products.

Generally, post-processing methods include applying a fluorine-based antifouling agent to the fabric by pad dry curing or spraying after dyeing.The fluorine-based antifouling compound used is poly( Meth)acrylic acid barfluoroalkyl ester compounds and mixtures thereof are mainly used.

However, even this method is insufficient as a technology for comprehensively stain-proofing aqueous stains such as coffee and juice stains, oil stains such as salad oil and hand grime, and the like. That is, the current level is that although it is effective against aqueous stains, it is insufficient for oily stains, and even though it is effective against oily stains, it is insufficient for aqueous stains.

[Problem to be solved by the invention]

The present invention aims to solve the above-mentioned problems and provide a durable fabric having excellent water repellency and stain resistance.

[Means to solve the problem]

In the present invention, after treating a synthetic fiber fabric with a water and oil repellent having a fluorine content of 50% by weight or more, the surface of the fabric is further bonded to carbon in the main chain with a fluorine content of more than 20% by weight and less than 50% by weight. A water-repellent and stain-proof fabric characterized by being treated with a polymer compound containing fluorine atoms.

The water and oil repellent having a fluorine content of 50% by weight or more (hereinafter sometimes referred to as "high fluorine content water and oil repellent") used in the present invention preferably has the following formula [■] [where R3 is hydrogen]. Atom or methyl group, R2 is (CHZ) CmF2
N14I or (CHz) kNSO2C,, F2F
-1, and n represents an integer from 3 to 70. Here, l is an integer from 0 to 4, m
is an integer from 4 to 16, k is an integer from 2 to 4, and p is an integer from 3 to 2.
R3 represents an integer of 0, and R3 represents a methyl group or a phenyl group.

] Water and oil repellents containing the compound represented by the following as a main component can be mentioned.

The high fluorine-containing water and oil repellent used in the present invention is one in which the fluorine content in the solid content is at least 50% by weight, more preferably 50 to 60% by weight, and includes, for example, a perfluoroalkyl group-containing agent. Poly(meth)acrylic acid ester water and oil repellents are preferred, and those having a molecular weight of 10,000 to 30,000 are used.

These high fluorine-containing water and oil repellents are generally non-ionic,
It is used as an emulsion liquid emulsified and dispersed with a cationic or anionic surfactant.

In order to obtain a water-repellent and stain-proof fabric in which the fiber surface is firmly coated with a high-fluorine-containing water- and oil-repellent, for example, the high-fluorine-containing water and oil repellent containing a perfluoroalkyl group can be coated using a known method.
For example, a method can be adopted in which the coating material is applied by dipping, roller coating, spraying, or the like, and then heat-fixed by drying and curing.

Note that the heat treatment conditions at this time include a heat treatment temperature of 100
-200°C, preferably 110-180°C, heat treatment time 1-10 minutes, preferably about 3-5 minutes.

The solid content of the high fluorine-containing water and oil repellent in the present invention is usually 0.2 to 7% by weight, particularly preferably 0.5 to 4% by weight, and less than 0.2% by weight is less than 0.2% by weight. It is difficult to form a complete film on the surface, and on the other hand, if the content exceeds 7% by weight, the performance reaches its upper limit and no more is needed.

Furthermore, the polymer compound containing a fluorine atom bonded to a carbon atom in the main chain used in the present invention (hereinafter sometimes referred to as a "low fluorine-containing polymer compound") refers to a polymer compound that has a fluorine content in the solid content. It is more than 20% by weight and less than 50% by weight. As a polymer compound containing a fluorine atom bonded to a carbon atom in the main chain, for example, the following formula (n) (wherein, (wherein q is an integer of 10 to 500). An example of a polymer compound containing a fluorine atom bonded to a carbon atom in the main chain is a tetrafluoroethylene/vinyl ether copolymer.

In the present invention, the polymer compound containing a fluorine atom bonded to a carbon atom in the main chain is preferably used in a diluted state with an organic solvent such as toluene, xylene, or xylene/n-butyl alcohol. be.

In the present invention, by performing the treatment with a high fluorine-containing water and oil repellent and the treatment with a polymeric compound containing a fluorine atom bonded to a carbon atom in the main chain in two stages, the square formula (I) can be obtained. The represented compound firmly adheres to the fibers, ensuring durability and providing water and oil repellency. However, this alone does not lead to high performance because the fluorine density on the surface is insufficient. By further treating with a compound represented by formula (II) containing fluorine in the carbon atoms in the main chain, the fluorine density on the surface can be increased and high-performance water and oil repellency effects can be obtained.

In the present invention, in order to obtain a water-repellent and stain-resistant fabric in which the fiber surface of a high-fluorine-containing water- and oil-repellent-applied fabric is firmly coated with a polymer compound containing a fluorine atom bonded to a carbon atom in the main chain, For example, a method of applying a tetrafluoroethylene vinyl ether copolymer to the surface of a fabric to which a high fluorine-containing water and oil repellent is heat-fixed by a known method such as dipping, roller coating, spray coating, etc., and then heat-fixing it by drying and curing. It can be done by

Note that the heat treatment conditions at this time include a heat treatment temperature of 120
-200°C, preferably 140 to 160°C, heat treatment time of 1 to 10 minutes, preferably about 3 to 5 minutes.

In the present invention, the solid content of the polymer compound containing a fluorine atom bonded to a carbon atom in the main chain is usually 0.1
~4% by weight, particularly preferably 0.2 to 3% by weight; if it is less than 0.1% by weight, the performance will not be different from that obtained by treatment with only the compound represented by formula [I], whereas 4% by weight If it exceeds , the performance is too close to that of the compound represented by formula (II) itself, and satisfactory results cannot necessarily be obtained.

The water and oil repellent having a fluorine content of 50% or more used in the present invention is generally an emulsion, while a polymer compound containing a fluorine atom bonded to a carbon in the main chain has a fluorine content of 20 to 50%. Use one that is soluble in organic solvents. Therefore, if the treatment is carried out in the reverse order of the present invention, the water repellency of the polymer compound containing fluorine atoms bonded to carbon in the main chain with a fluorine content of more than 20% by weight and less than 50% by weight becomes an obstacle. It is difficult to process water and oil repellents with a fluorine content of 50% or more.

The synthetic fibers used in the present invention include, for example, polyethylene terephthalate, polybutylene terephthalate, polyethylene (terephthalate/isophthalate) copolymer, poly(butylene/ethylene) terephthalate copolymer, and electrostatic modification and flame retardant modification thereof. , cationically dyeable and modified polyester fibers, polyamide fibers such as nylon 6, nylon 6.6, nylon 11, nylon 12, nylon 612, nylon 4.6 and their modified nylons, but especially these It is not limited to.

The fabrics used in the present invention are those that can be used for automobile interior materials such as car seats, ceiling materials, and car mats, as well as interior materials such as carpets and upholstery, and include warp knitted fabrics such as tricot and double raschel, Circular knitted fabrics such as sinker pile, napped fabrics such as moquette, woven and non-woven fabrics such as plain weave, twill weave, and satin weave.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.

In addition, in the examples, % is weight %.

In addition, in the examples, coffee stains and artificial contamination were measured by the following methods.

Coffee' 51 20c of coffee mixed with the following ingredients heated to 50°C
c was dropped onto the test piece from a funnel with a height of 30 cm all at once, and the coffee floating on the surface of the fabric was gently sucked up completely with a cloth and then wiped vigorously with a white lined cloth.

Coffee ingredients Instant coffee (powder) 1.5g Creamy powder 4.0g Granulated sugar 6.0g Boiling water
100.0 ccThen, the degree of dirt on the surface and the spread of the dirt were visually judged.

The judgment criteria are shown below.

Grade: Judgment Criteria Grade 5; No stains observed at all Grade 4; Dirt spread to a diameter of less than 30 mm Grade 3; Dirt spread to a diameter of 30 mm or more and less than 60 mm Grade 2; Dirt has a diameter of 60 mm 1st class with a spread of less than 9 o's diameter; 1st class with a spread of 90 mm or more in diameter; A 7.5 x 10 cm piece of fabric was placed in a round-o-meter pot, rotated at 42 rpm for 60 minutes, and then cured for 1 minute at 1°C to adhere to the surface with air. In the second stage treatment, the raised tricot after the first stage treatment was immersed in a low fluorine-containing polymer compound solution, reduced to 60 to 65%, and then cured at 160°C for 1 minute.

Note) - The high fluorine-containing water and oil repellent used in step 1 and the low fluorine-containing polymer compound used in step 2 are all manufactured by Asahi Glass.
Made in Japan.

3 Contaminants were removed.

The degree of contamination was calculated by measuring L8 and using the following formula [■].

(In the formula, L"+01 is the reflectance of the uncontaminated fabric, and L" (6o) is the reflectance of the uncontaminated fabric.
Figure 2 shows the reflectance of a fabric contaminated for minutes. ) Examples 1 to 4 and Comparative Examples 1 to 5 Polyethylene terephthalate semidull 75 denier/3
The fabric was knitted using a 28-gauge 3-bar tricot knitting machine using 6-filament yarn, and dyed, brushed, and finished in a process similar to a boat fishing process to obtain a beige-colored raised tricot with a basis weight of 335 g/bore.

The raised trichomes were treated under the conditions shown in Table 1, and the antifouling properties of the treated raised trichomes were examined. The results are shown in Table 1.

In the first stage of treatment, the raised tricot was soaked in a water and oil repellent emulsion, reduced to 60-65%, and
1602 Examples 5-6, Comparative Examples 6-8 BCF nylon Brl, 600 denier (800 denier double thread) was used to form a polyester nonwoven fabric (fabric weight: 3.5
oz/square yard) to create a carpet (tufting standard 1/10" x 10.8"° x'8.
0FH 1st dimension near 00g/rrf).

This carpet was treated under the conditions shown in Table 2 to make it water repellent and
The stain resistance was evaluated.

4 The results are shown in Table 2.

Table 2 [Effects of the Invention] The present invention is a durable fabric with excellent water repellency and stain resistance, which can be used for various vehicle interior materials such as car seats, ceiling materials, and car mats. Interior material: Can be widely used for interior materials such as carpets and upholstery.

Claims (2)

[Claims] (1) After treating a synthetic fiber fabric with a water and oil repellent having a fluorine content of 50% by weight or more, the surface is further coated with fluorine atoms bonded to carbon in the main chain with a fluorine content of more than 20% by weight and less than 50% by weight. A water-repellent and stain-resistant fabric characterized by being treated with a polymer compound containing. (2) The water-repellent and stain-resistant fabric according to claim 1, wherein the synthetic fiber is a polyamide fiber or a polyester fiber.