JPH03180574A - Finish processing of fiber structure - Google Patents

Abstract

PURPOSE:To simultaneously impart durability, excellent color fastness to light and abrasion resistance to a fiber structure by immersing the fiber structure in a treating agent comprising an aqueous urethane resin and a stabilizer for the urethane resin and subsequently heating the treated fiber structure. CONSTITUTION:A fiber structure is immersed in an aqueous treating bath compounded with aqueous urethane resin of blocked polyisocyanate prepolymer type and with a stabilizer for the resin, such as 6-hexanemethylene-bis-(N- dimethylsemicarbazide) in an amount of >=10wt.% based on the resin, followed by heating the immersed fiber structure to form a stable coat on the fiber structure, thereby improving the aging deterioration, touch deterioration and color-fading inclination of the fiber structure and further improving the color fastness to light and abrasion resistance of the fiber substrate itself. The method provides a good result when applied to the dry cleaning process of high grade fiber products such as silk.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a finishing method for imparting durability to a fiber structure;
In particular, the present invention relates to a finishing method for fiber structures that simultaneously imparts light resistance and abrasion resistance.

(Prior art) Textile structures such as woven fabrics, knitted fabrics, and lace are generally finished in the final process after scouring and bleaching or dyeing, to improve product performance and texture. A wide variety of finishing agents are used depending on the required product characteristics, such as sensitivity.

Recently, the pursuit of specialized processing for functionality and sensibility has become active in the clothing field, and specialized finishing using urethane resin is attracting particular attention.

Urethane resins that have -NH-CO- bonds in their molecules are generally synthesized by polyaddition reaction using polyisoanate and polyol as main raw materials, but urethane resin finishing agents with a wide variety of molecular structures and physical properties can be produced depending on the combination of raw materials. It has become commercially available. For fiber processing, mainly aqueous types are in practical use, and in particular, heat-reactive blocked incyanate prepolymer types (for example, Elastron manufactured by Daiichi Kogyo Seiyaku ■) are often used.

In this type, the blocking agent is dissociated by heat treatment to form a polymer film on the fiber, and it is said that it can also chemically react with functional side chains (eg, hydroxyl groups) within the fiber.

This type of urethane resin is generally highly evaluated because it imparts a soft and elastic feel to fibrous structures and significantly improves abrasion resistance and shrink-proofing properties. A typical example is Siloran BAP processing, which is a well-known anti-shrunk treatment for wool, but recently, wrinkle-proofing treatment for cellulose fibers (Japanese Patent Application Laid-open No. 77678/1984) and threading (fuzzing) on silk textiles have become more popular. Prevention processing (JP-A-63-81579
An attempt to use this method has also been proposed.

(Problem to be solved by the invention) As mentioned above, urethane resins are manufactured with a wide variety of performance depending on the combination of raw materials, and their applications are expanding in a wide variety of fields. However, it is said that it is susceptible to discoloration, deterioration, and decomposition due to light, heat, oxygen, water, NOx, etc.As there is still little experience in the finishing of textiles, at present there are no shrink-proof, abrasion-resistant, wind-resistant Although only the effects of processing such as improved chemical composition are emphasized, failure accidents such as coloring and deterioration due to sunlight and changes in performance after a long period of time are thought to be the weaknesses of urethane resin.

Therefore, the purpose of the present invention is to fully exhibit the effect of improving general physical properties such as shrink-proofing, wrinkle-proofing, and abrasion resistance in fiber processing using urethane resin, without deteriorating the texture of textile products, and without reducing sunlight and sunlight. An object of the present invention is to provide a finishing method that has high durability even against ultraviolet rays.

(Means for solving the problem) Antioxidants and ultraviolet absorbers are added as stabilizers for resins such as bottom-type urethane resins, but among these stabilizers, hydrazine derivatives with active ray-protecting groups, For example, 1,6-hexamethylene-bis-(N,N'-dimethylsemicarbazide) (trade name, HN-130, manufactured by Nippon Hydrazine ■) has long-lasting properties not only for urethane resins but also for various polymers. have a long deterioration prevention effect,
Recently, the effect of preventing yellowing of silk has also been recognized.
2-6976).

The present inventors have adopted a method in which a urethane resin stabilizer, preferably HN-130, is added in an amount of 10% by weight or more, preferably 10 to 20% by weight, based on the pure urethane resin in the finishing process of a fiber structure made of urethane resin. It has been found that this method is effective not only in preventing coloring and deterioration of fibers due to ultraviolet rays, but also in preventing photodeterioration of the urethane coating on the fibers over a long period of time.

Figure 1 shows silk 35 momme Habutae dyed with 068% Irugalan Blue FBL, then urethane resin [Elastron M
F-9 (30% solution) 1150g/R, HN
-130 was immersed in treatment baths prepared with varying amounts, squeezed, dried, and then irradiated with xenon for 100 hours using Xenon 3 SUN to measure the degree of yellowing. It is clear from FIG. 1 that the degree of yellowing (Δb) is improved when HN-130 is contained in an amount of 10% by weight or more.

Furthermore, the coating itself becomes more flexible with the addition of LLN-130, so if this method is used for finishing thin fabrics and knit fabrics where delicate tactility is important, superior sensitivity can be achieved. that you can obtain a product with
Even when used in woven fabrics for heavy clothing such as outerwear, there is no fear that the texture will be impaired even if the amount of urethane resin adhered is increased beyond the conventional limit, and the effect of improving abrasion resistance etc. can be increased accordingly. became.

Therefore, in the finishing method of a fibrous structure of the present invention, the fibrous structure is impregnated with a treatment bath consisting of an aqueous urethane resin and a stabilizer for urethane resin, and then heat-treated, preferably at 60 to 120°C.
It is characterized by heat treatment at a temperature of .

Since the urethane resin used in the present invention is fiber-finished, it is desirable to use a water-soluble block type resin, and a typical example currently on the market is Elastron MP-9 (
Examples include Elastron BAP (manufactured by Daiichi Kogyo Seiyaku ■), Syntapret BAP (manufactured by Bayer), and the like. Depending on the requirements for the desired processing effect, a reaction catalyst, base resin, polyamide, polyacrylic, etc. may also be used in combination.

Since IN-130 used in the present invention is water-soluble and does not chemically bond to fibers or urethane resins, the light resistance of the processed products of the present invention is impaired by aqueous washing. Therefore, it is particularly useful for outer clothing and interior items that require less water-based washing, and when washed, HN is used for the final rinse.
If -130 is added, the light resistance will be exhibited again. However, applying dry cleaning is the most recommended method, especially for delicate luxury items that cannot be washed with water, such as silk.

(Example) The invention is illustrated by the following examples.

Example 1 A plain woven fabric (60 g/m2 Fuji Silk) using spun silk for both the warp and weft was immersed in the following treatment bath (aqueous solution) at room temperature for 3 minutes, squeezed to about 85% with a roll mangle, and then heated at 100°C. It was heat-treated for 3 minutes and dried.

Elastron MF-9 (30% solution) 150g/
RHN-1305g/1 The performance of this processed sample, a control sample treated in the same manner with a treatment bath containing only Elastron MF-9, and an untreated sample were as shown in Table 1. Treatment with urethane resin alone (control treated sample) had the effect of improving the wrinkling properties of spun fabrics, but it caused significant yellowing and embrittlement due to ultraviolet irradiation. The sample processed according to the invention in Example 1 had excellent light resistance.

Example 2 A 14-momme silk habutae dyed with 0.8% Irugalan Blue FBL (metal complex dye) was immersed permanently in the following treatment bath for 3 minutes, squeezed to about 88%, and heated to 100°C for 3 minutes. Publicly dried.

Elastron MF-9 (30% solution) 120g/
The performance comparison results with the control treated sample and the untreated sample with the bath without IHN-1306 g/ntlN-130 are shown in Table 2.

Table 2 Bending resistance, Hartloop method It is clear that the processed box of Example 2 shows almost no discoloration or fading even if the xenon tip is irradiated for a long time, and the texture remains unchanged. On the other hand, the box treated solely with urethane resin not only showed significant discoloration and fading, but also had a considerably worse texture.

Example 3 Refined 20 momme Aba double was immersed in the following treatment bath at room temperature for 3 minutes, squeezed to 85% and dried at 110°C for 3 minutes.

Elastron 1. IF-9120g/Sumitex Resin Hachihe-1 (20% polyamide) 60g/(
! HN-1306g/NH Table 3 shows the performance comparison test results with a control treated sample that does not contain HN-130 and an untreated sample.

It can be seen that the processing box of Example 3 maintains high abrasion resistance even when irradiated with xenon light, and is quickly resistant to yellowing.

Example 4 A wool muslin dyed with 2% Mikasion Blue 2R (reactive dye) was immersed in the following treatment bath at room temperature for 5 minutes, squeezed to 72%, dried at 120°C for 4 minutes, and then treated at 140°C for 2 minutes. Cured for minutes.

Elastron BAP (20% solution) 80g
/ 1 Sodium hydrogen carbonate 3g/f Sodium hydrogen sulfite 8g #) IN-1306
The comparative test results with the control treated sample without g/I HN-130 and the untreated sample are shown in Table 4.

Resistance to felt shrinkage, Accelerotor method; Book 2 Anti-pilling, JISL1076F Example 4 processed sample and control treated sample provide similar anti-shrinkage and anti-pilling properties, but Example 4 has better light resistance. I understand that.

Example 5 Cotton kanakin (40' S) dyed with 1% Diamond Brown CB (direct dye) was thoroughly soaked in the following treatment bath (75% squeezed solution), dried at 100°C for 3 minutes, and dried at 160°C for 3 minutes.
Cured for a minute.

Elastron MF-9200g/I! Elastron Catalyst 64 5g #2 Sumitex Resin N5-1
8 1608/ j2 (45% glyoxal resin) HN-1308g/ I! Polyethylene softener 10g/RHN-13
Comparative test results are shown in Table 5 with a similar control treated sample that does not contain 0 and an untreated sample.

Table 5 The effect of improving the light resistance of the processed sample of Example 5 is also observed in the combination of cotton fiber and direct dye.

(Effects of the Invention) The present invention improves the stability of the resin coating formed on fibers by adding a hydrazine-based urethane resin stabilizer to the conventional finishing process using urethane resin, and prevents deterioration of the coating over time. It is possible to improve not only the deterioration of the composition and the tendency towards discoloration and fading, but also the light resistance of the fiber matrix itself. Furthermore, this effect is much more sustainable than when using antioxidants or ultraviolet absorbers, and it also has the advantage of increasing the flexibility of the film itself.

[Brief explanation of the drawing] Figure 1 is a curve diagram showing the change in yellowing degree depending on the amount of stabilizer when a sample of silk 35 momme Habutae is finished with urethane resin and urethane resin stabilizer after dyeing. It is.

Claims (1)

[Scope of Claims] 1. A method for finishing a fibrous structure, which comprises impregnating the fibrous structure with a treatment bath consisting of an aqueous urethane resin and a stabilizer for urethane resin, and heat-treating the fibrous structure. 2. The method according to claim 1, wherein the aqueous urethane resin is of the blocked polyisocyanate prepolymer type. 3. Stabilizer for urethane resin is 1,6-hexamethylene-
bis-(N,N'-dimethylsemicarbazide),
The method according to claim 1, characterized in that the stabilizer is contained in an amount of 10% by weight or more based on the pure content of the urethane resin.