JPH02502032A - Enzyme treatment of wool - Google Patents

Abstract

The invention relates to a process for the production of wool and animal hairs with a low-in felt or felt-free finish, with a soft woolly handle and special shrink-resistance and strength. In this process, the wool is treated with a protease and is then treated at a temperature of between room temperature and 140 DEG C.

Description

[Detailed description of the invention] Enzyme treatment of wool The present invention uses wool and animal hair with a low-felted or non-felted finish. This invention relates to a manufacturing method and the wool or animal hair obtained thereby.

Obtaining unfelted wool has been a long-standing challenge and many methods including enzymatic treatment has been proposed to solve this problem. Explanations of such methods are given in E, P. Textil-Praxis by Fr1eser, Volume 18 (1963) 03), pp. 236-240, and W. R. Middlebroo. J, Soc by K and H, Phllips.

Dyers and Co1orfsts, Volume 57 (1941), 137~ 144 pages, and by A. N. Davidson and R. Preston. J, Text, 1nst, vol. 47 (1956), pp. 685-707 (beta) Reference is made to the description in the German Patent No. 536.819). Yo It is not necessarily stated as clearly as in Roppa Patent Application 134,267. However, the purpose of these enzyme treatments is complete descaling of the wool, i.e. The outer surface of the fibers is completely removed so that the natural characteristics of the wool are lost. The objective is to change the characteristics of

The aim of the invention is to preserve wool and animal hair that retains its natural characteristics and still takes on scale. It is to manufacture. This objective is superficial and brief in contrast to known treatments. However, it can be washed in a normal domestic washing machine without giving inconsistent results. This is accomplished by enzymatic treatment, which is effective in obtaining a product that can be used. this A reliable method for distinguishing products from natural wool is published by the International Wool Secretariat. The IS TestMethod 31 is represented. Untreated fibers should be recorded at the latest. Although it begins to feel after 3 cycles of 7A washes, according to the present invention Enzyme-treated wool is passed through at least 5 of these cycles without felting. I can endure it.

Other ways to determine whether wool fibers can be said to be non-felted is a well-known Cubex test according to IS Te5t Method 185, This test tests the shrinkability of wool by processing it in cubic form for one hour in standard washing equipment. It is measured by

In this test, wool is less than 10% after at least 1 hour of Cubex testing. The term 0 area shrinkage should refer to the % shrinkage in the length direction and the width. This should be understood as the sum of the % shrinkage in the direction of Approximately 15 to 20 times without shrinkage or obvious changes in surface and shape. Equivalent to washing.

Additionally, the yarn strength of treated wool is reduced by 1% compared to untreated wool. Must be less than 5% Rkm, and the decrease in elongation must be less than 20%. No.

Therefore, the present invention has the following characteristics: a) After at least 1 hour Cubex test or 5 cycles according to ISTM 31 Area shrinkage smaller than 10% after cycle A (% shrinkage in length direction and % shrinkage in width direction) % shrinkage), b) 15% RkII+ compared to untreated wool or animal hair. less yarn strength loss, and c) elongation reduction of less than 20%; have a low-felted or non-felted finish as defined by Made of wool or protein-containing animal hair (having a soft texture and appearance of natural wool) A method in which wool or animal hair is brought into contact with protease and then treated with Concerning a method characterized in that the treatment is carried out at a temperature of room temperature (20°C) to 140°C .

Protease means any proteolytic enzyme.

Suitable proteases include enzymes recovered from bacteria, such as esperase, protease, etc. enzyme E2 protease P, subtilisin, thermolysin, and animal or plant Enzymes from natural sources, such as trypsin, pepsin, vancreatin or prometh It is also possible to use mixtures of different enzymes.

These proteases are commercially available and are preferred for the method according to the invention. Interesting proteases are animal and plant enzymes, especially promelain.

The effectiveness of the enzymes used is cysteine, dithioerythrol, dithiothreit by adding specific activators such as alcohol or mercaptoethanol. It can be strengthened. Other additives such as salts known to stabilize enzymes It is also possible to use, for example, calcium chloride or zinc chloride. These salts It is used in an amount equivalent to the element.

Treatment of wool or animal hair with proteases is carried out in long or short baths. place The treatment is preferably applied to padding, spraying, coating or printing. Therefore, impregnation is performed from a short bath. Proteases can be prepared in aqueous medium or in organic solvents. It can be used as a paste or foam. The bath ratio is usually , if the treatment is continuous, 1:0.7 to 1:10, preferably 1:1 to 1:5 range of 1:10 to 1:40 when the treatment is carried out from a long bath. Ru.

The application of proteases is preferably carried out at temperatures between room temperature and 60°C. It will be done. The processing solution or paste is preferably prepared using a commercially available buffer. 9, especially adjusted to a pH of 5 to 7.

Proteases are usually used in amounts of 0.1-5%, calculated on the dry weight of the wool. used in When applied by impregnation, the protease is 400-1500 It is used in an amount of 0.1-2%, corresponding to the enzymatic activity of CDU#og. preferably is used in an amount of 0.5-1%. When passed from a long bath, protease is , used in amounts of 1 to 5%, calculated on the dry weight of the wool.

Immediately after enzyme treatment, the wool or animal hair is left undisturbed and/or heat treated. attached to. Standing times can range from short interim periods to several hours, and may Target or complete drying is performed. Depending on the temperature, heat treatment can last from a few minutes to several hours as desired. This is done until the wool is dry. Saturated steam, heated steam, hot air or high Frequency (HF) is used for heat treatment.

For example, in the case of steaming with saturated steam, wool or animal hair Advantageously, it is left for 0 minutes. In an HF dryer, wool or animal hair is approximately 10 Conditions for standing or heat treatment, preferably treated at 0 to 102°C for 10 minutes to 1 hour The enzymes are preferably used at the end of the treatment so that the resulting wool has the desired properties. selected to be inactivated at the same time. Enzymes that are still active can be processed using known methods. It can also be deactivated.

The wool or animal hair is then washed, dried and further processed.

The method of the present invention is used on both wool and other protein-containing animal hairs.

The fibrous material can be processed at various stages of processing, such as flocking, top and roving, Wool can be in the form of yarn, knit, woven, non-woven or felt. It can be used in the method according to the invention in a raw or pretreated state.

to achieve a desired effect and/or to optimize the action of proteases. For wool or animal hair, it is recommended that certain pretreatments be carried out before enzymatic treatment. Pre-treatments such as hydrogen peroxide, optionally in the presence of stabilizers, can be carried out by potassium nganate, caroic acid, chlorine or chlorine gas, hypochlorite or organic chlorine Oxidation treatment with chlorine-containing compounds such as carriers or with ozone, e.g. , reductive pretreatment with hydrosulfides, sulfoxylates or sulfides; Alkaline treatment, acids, solvents or lipases, catalases, oxidases or peroxides Pretreatment with enzymes such as oxidases, or e.g. various forms of HF waves or may be a physical treatment by irradiation such as low-temperature discharge; these preliminary treatments are well known. It is used in part to modify wool.

After pre-treatment, the wool or animal hair is washed and dried.

In a preferred feature of the method according to the invention, the wool or animal hair is salted by oxidation. and then treated with proteases.

Oxidative chlorination of wool or animal hair is preferably carried out using e.g. or with active chlorine in the form of sodium hypochlorite with hydrochloric acid. this Pretreatment can be performed by a known method. Wool or animal hair is preferably , subjected to mild chlorination. Wool or animal hair is preferably wool or animal hair. Chlorinated with active chlorine in an amount of 0.1-2%, calculated on the dry weight of the hair. salt The plating is preferably carried out at a temperature of 10-30°C.

After pre-treatment, the wool or animal hair is expected to remain in order to achieve the desired enzymatic action. Advantageously, it is free of pretreatment agents and has a pH in the neutral range.

After chlorination, the textile material is treated to be free of residual chlorine and then or sometimes neutralized. Chlorine present on or within the fibers can be removed by reducing agents, e.g. Removed by treatment with reducing agents such as sodium sulfate and sodium sulfite. Ru. Neutralization is advantageously carried out with alkaline compounds, for example carbonates of alkali metals. will be held.

Depending on the conditions chosen, wool or or the scale layer of the animal hair is partially or very slightly altered or activated. Ru. As a result of the enzymatic treatment, the tendency to felting is reduced and the tendency to felting is reduced and causing problems during whitening, dyeing) and during the use and washing of products obtained from it. The result is wool or animal hair that does not

The wool treated according to the invention is a soft (which is particularly advantageous) natural wool. It has a le-like texture. chlorinated as the top and then treated with enzymes as described above. Particularly soft wool or animal hair is produced when processed according to the invention. Dyeing behavior of dyed wool or animal hair and fastness characteristics of dyed wool or animal hair Sexuality is not adversely affected; on the contrary, they are significantly improved.

The examples below are for the purpose of illustrating the invention. 0% is given by weight and temperatures are in degrees Celsius. It is.

rainbow wool) 7 lbs, buffered to p) +6, calculated to the dry weight of the top 0. 5% esperase (Bac, l1ch, obtained from Novo (Denmark)) 40' with an aqueous solution containing 50% of the impregnation rate.

The impregnated top is then left in saturated steam at 10@2 for 15 minutes. This process Afterwards, the top is washed and then dried.

A flexible wool with a low degree of felting that can be spun with almost no waste. can get.

51 The operation in Example 1 was repeated, but after padding and squeezing, the top was first left for a while. and then processed in an HF dryer at 100-102° for 30 minutes.

Five l The wool top is submerged with chlorine water containing 0.4% active chlorine. Pad for 3 seconds at a temperature of 10-20'' using a 7-topper 7-der, then woofer. 4g/! of sodium carbonate and 1g/2 of sodium bisulfite. Treat with the solution for 45 seconds and wash twice.

After drying, the chlorinated tops are enzymatically treated according to Example 1 or Example 2.

■Soil The wool top was treated with 15d of 40% hydrogen peroxide per Ij2 and 3d of water per Ij2. Contains a commercially available silicate-free hydrogen peroxide stabilizer and adjusts to a pH of 5.5-6.0. Treat for 60 minutes at 30" in a well-prepared bath. The bath ratio is 1:20. The tops are washed with water and then treated with enzymes according to the procedure of Example 1.

Another E Wool top with 15I11 40% hydrogen peroxide by volume and 4g# ! of sodium pyrophosphate in a bath adjusted to a pa of 7.5 to 8.5. Treat at 5° for 5 hours. The bath ratio is 1:20.Then the wool is washed with water and then Enzyme treatment as described in Example 1.

and The wool top was washed at 20° in a bath containing 6% peroxymonosulfuric acid (caroic acid). Process for 60 minutes. The bath ratio is 1:20. Then add 2% sulfuric acid to the bath and The samples were further treated in this bath for 30 minutes at 26°. Then, 12% sodium sulfite The wool is added to the bath and the wool is further treated at 309 for 20 minutes.

After washing with water, the wool is enzymatically treated according to Example 1.

Five l The wool top was treated with 25 papers per Ij2 of 40% hydrogen peroxide by volume and 25 g/j Bad at 30' with a solution containing 2 parts potassium pergate and adjusted to 7 parts pl'l. do. The impregnation rate is 60%.

After standing for 10 hours at room temperature, the wool was washed and then treated as described in Example 1 or Example 2. Treat with enzymes.

■ Presentation The wool top was treated with 0.5% commercially available peroxidase and 0.25 mol//! 3I! Treat with J hydrogen oxide at 40' for 6 hours.

The bath ratio is 1:25. The wool is then washed with water and then as described in Example 1 or Example 2. Treat with esperase in this way.

upper plate Wool tops were treated with a bath containing 0.5% commercial lipase at 40° for 6 hours. do. The bath ratio is 1:20. The wool is then washed with water and then prepared as described in Example 1 or Example 2. Make it sticky and treat with esperase.

ill Wool top with 0.2% commercially available catalase and 40j! l! 40 volumes /l The impregnation rate is increased to 50% with a solution containing % hydrogen peroxide. impregnated wool is then allowed to stand at room temperature for 6 hours and then washed with water.

The pretreated wool is then treated with esperase as in Example 1 or Example 2. do.

In Examples 1 to 11, a protease such as pancreatin is used instead of esperase. ze can be used. Wool with a flexible wool-like texture and shrink-proof properties is obtained.

■And false Mengdandan Example 1 and using 0.5% bromelain instead of 0.5% esperase. Repeat example 2.

A wool with a soft wool-like feel and anti-shrunk properties is obtained.

Repeat Examples 3-11 using appropriate amount of bromelain instead of esperase. be able to. A wool with a flexible wool-like texture or shrink-proof properties is obtained. .

■… Instead of esperase, 1% protein applied from a long bath in a 1:20 bath ratio. Repeat Example 1 using Lomelain.

Continue treatment at 50' for 4-6 hours. After washing with water, dry the wool top. woolt The wrap exhibits a soft wool-like feel and good anti-shrink properties.

1 length Pre-treat the wool top as in Example 3 and further process and finish after cleaning. . These finished products can be processed as in Example 14 and have excellent properties. show.

international search report m□140m-1 PCT/ΣP 88100971 International Search Report

Claims (8)

[Claims] 1. a) After at least 1 hour Cubex test or according to IWS TM31 Area shrinkage less than 10% after 5 cycles 7A (% shrinkage in length direction and % shrinkage in width direction) b) 15% Rkm compared to untreated wool or animal hair less yarn strength loss, and c) elongation reduction of less than 20%; wool with a low-felted or non-felted finish defined by or a method for producing protein-containing animal hair, in which wool or animal hair is treated with protease. and then treating it at a temperature between room temperature (20°C) and 140°C. How to make it a sign. 2. The proteases used are esperase, pronase E, protease P, saptilisin, thermolysin, trypsin, pepsin, pancreatin or blu The method according to claim 1, characterized in that it is Lomelain. 3. Wool or animal hair is impregnated with protease and, after a short period of time, at least 1 The method according to claim 1 or 2, characterized in that the heat treatment is performed for 0 minutes. 4. Protease is 0.1-5% calculated based on the dry weight of wool or animal hair. The method according to any one of claims 1 to 3, characterized in that it is used in an amount of . 5. Claims 1 to 3, characterized in that the wool or animal hair is first pretreated. 4. The method according to any one of 4. 6. wool or animal hair is first subjected to a mild treatment by oxidation or reduction 6. The method of claim 5, characterized in that: 7. Wool or animal hair treated according to any of claims 1 to 6. 8. Enzyme-treated, resin-free and with a virtually unchanged scale layer , wool or animal hair with the following properties: a) After at least 1 hour of Cubex test or according to IWS TM 315 Area shrinkage less than 10% after cycle 7A (% shrinkage in length direction and % shrinkage in width direction) b) from 15% Rkm compared to untreated wool or animal hair small yarn strength loss, and c) Elongation reduction of less than 20%.