JPS633075B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method for modifying silk, particularly for improving the quality of silk fibers by imparting wrinkle resistance, shrink resistance, bulkiness, etc. to silk fibers. [Prior Art] This type of modification processing method for silk involves grouting polymerization of silk threads with vinyl monomers such as styrene, methyl methacrylate, (meth)acrylamide, etc., thereby increasing the weight of the silk threads and imparting wrinkle resistance and wrinkle resistance to the silk threads. It is known to impart heat-setting properties and the like. [Problems to be solved by the invention] Products using vinyl monomers have insufficient wrinkle resistance, heat setting properties, etc., but on the other hand, they do not have the inherent advantages of silk, such as hygroscopicity, dyeability, and electrical resistance. However, there were problems such as loss of texture. [Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention provides wrinkle-proofing properties, shrink-proofing properties, and easy-to-use silk fibers without impairing the inherent advantages of silk, such as texture, luster, dyeability, and hydrophilicity. It provides a silk modification processing method that improves quality by imparting care properties, bulkiness, abrasion resistance, etc., and its characteristics are as follows: (In the formula, R is hydrogen, methyl, carboxylic acid, or alcohol group) Chemically processed into silk fiber with N-methylol acrylamide or N-methylol methacrylamide using an aminoalkane carboxylic acid represented by the following as a catalyst for the condensation reaction of methylol groups. The goal is to do the following. In that case, the aminoalkane carboxylic acids include aminoacetic acid (R=H), aminopropionic acid (R=
CH ₃ ), aminosuccinic acid (R=CH ₂ COOH), aminoglutaric acid (CH ₂ CH ₂ COOH), hydroxyaminopropionic acid (CH ₂ OH), and aminohydroxybutyric acid (CH ₃ CHOH). [Operation] A silk cloth is immersed in an aqueous solution of N-methylol acrylamide or N-methylol methacrylamide (100 to 300 g/l) and 10 to 50 g/l of the above condensation reaction catalyst, and the liquid is dehydrated to 70 to 100%. , then after pre-drying at below 80℃, approximately below 125℃, 100
Curing is performed for 2 to 7 minutes at a temperature of ℃ or above, and the methylol group of N-methylol acrylamide or N-methylol methacrylamide is chemically bonded to silk fiber molecules to impart wrinkle resistance, shrink resistance, bulkiness, etc. In addition, by using aminoalkanecarboxylic acid as a catalyst for the condensation reaction of methylol groups, it does not impair silk's original texture, dyeability, hydrophilicity, etc., and since the reaction occurs at approximately 125°C or lower, it does not cause deterioration of gloss or
There is no risk of yellowing or the like. Further, in the above processing method, the same effect can be obtained even if the curing time is further shortened by further adding a small amount of MgCl ₂ . Furthermore, by adding a known radical polymerization catalyst to cause a reaction of vinyl groups, improvements in wrinkle recovery properties and easy care properties when wet can be obtained. Also,
By using a non-methylol homolog in combination with the N-methylol monomer, the effect of filling the fibers can be emphasized and bulkiness can be increased. [Example 1] 40 g of refined flat feather doublet (with 12 momme) was immersed for 1 minute in a treatment bath having the following composition, and squeezed with a two-roll mangle to a liquid removal rate of 95%. N-methylolmethacrylamide 200g aminosuccinic acid 20g water 1000g Next, preliminary drying was performed at 70°C for 3 minutes, and hot air curing was further performed at 120°C for 5 minutes. Thereafter, the Cure sample was reaped in a 2 g/l soap solution at 70°C for 15 minutes, washed with water, and dried (weight increase rate: 15.8%). The thus obtained silk fabric had excellent dry and wet wrinkle resistance, high shrink resistance, and improved easy care properties. It also exhibited a bulky texture, which is an inherent advantage of silk, and its luster and whiteness remained unchanged. Table 1 shows the main performance test results.

[Example 2]

Refined silk habutae (with 10 momme) was filled with the following treatment bath, then squeezed to 90%, pre-dried at 70°C for 3 minutes, and then cured at 110°C for 5 minutes. N-methylol acrylamide 150g Methacrylamide 50g Aminoacetic acid 15g Magnesium chloride 5g Potassium persulfate 2g Water 1000g As shown in the data in Table 2, this processed silk sample has excellent wrinkle resistance, easy care, abrasion resistance, and shape stability. The effect of improving bulkiness, etc. was significantly recognized, and the inherent advantages of silk, such as hygroscopicity, air permeability, bending resistance, etc., were hardly impaired, making it possible to improve the quality of silk fibers.

[Table] [Example 3] 16 momme Fuji silk is filled with the following treatment bath (80% squeezed liquid)
After pre-drying at 80°C for 3 minutes, it was cured at 110°C for 5 minutes. N-Methylolmethacrylamide 200g Methacrylamide 100g Hydroxyaminopropionic acid 20g Magnesium chloride 10g Ammonium persulfate 4g Water 1000g Fuji silk, which is made using silk spinning, has the disadvantage of poor morphological stability such as being extremely susceptible to shrinkage, but this processing However, the processing rate must be higher than in the case of long-fiber woven fabrics. Table 3 shows the test results.

〔Effect of the invention〕

As described above, the present invention has the general formula (In the formula, R is hydrogen, methyl, carboxylic acid, or alcohol group) Chemically processed into silk fiber with N-methylol acrylamide or N-methylol methacrylamide using an aminoalkane carboxylic acid represented by the following as a catalyst for the condensation reaction of methylol groups. The aim is not to obtain bulkiness by increasing the weight (the increase rate is about 10 to 20%), but rather the methylol groups of the monomer compound filled inside the silk fibers form silk molecules through the subsequent low-temperature curing. By chemically bonding to silk fibers, silk fibers are given remarkable anti-wrinkle, anti-shrinkage, easy-care properties, etc. that were previously unobtainable, and are free from the disadvantages that occur when curing at high temperatures. The effect is that the luster of the product is not impaired and the side effect of coloring and yellowing does not occur. Also N
- When a methylol monomer is used in combination with a non-methylol analogue, the effect of filling in the fibers is emphasized and bulkiness can also be increased. In addition, by polymerizing a portion of the vinyl group, it has great effects, such as improved wrinkle recovery properties and easy care properties when wet.

Claims (1)

[Claims] 1. General formula (In the formula, R is hydrogen, methyl, carboxylic acid, or alcohol group) Chemically processed into silk fiber with N-methylol acrylamide or N-methylol methacrylamide using an aminoalkane carboxylic acid represented by the following as a catalyst for the condensation reaction of methylol groups. A silk modification processing method characterized by applying.