JPH02221469A - End tapering of napped fiber of napped fiber structure - Google Patents

Abstract

PURPOSE:To obtain napped structure having animal hair-like touch and appearance by providing the tip of napped fiber of napped fiber structure with a treating agent to dissolve the napped fiber and heat-treating one side of the napped fiber structure from the tip side to thin the tip of napped fiber in a tapered state. CONSTITUTION:The tip of napped fiber of napped fiber structure comprising polyester or polyamide fiber as a pile component is partially coated with a treating agent containing a compound capable of dissolving or decomposing fiber constituting the napped fiber, one side of the napped fiber structure is heat-treated (80-200 deg.C) from the tip side, the tip part is thinned in a tapered state to readily provide napped fiber structure having flexibility and animal hair-like touch.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for sharpening the napped tips of a napped fiber structure.

<Prior Art> It is well known that the tip of the fur of animals such as mink and fox has a tapered tip that contributes to the texture and appearance.

Attempts have also been made to obtain sharp edges similar to those of animal hair in synthetic fibers.

(1) Ultrafine fibers, split fibers, or sea-island type fibers are used as napped fibers, and the tips of the napped fibers are made ultra-fine by dissolving some of the components with a solvent or swelling agent, or by dividing the components. Method (2) Method of rubbing and polishing the tips of the fibers (3) Method of immersing or contacting the tips of the fibers in a solvent or decomposition agent (4) Method of pulling the fibers while heating (5) Rapping of the raised fabric (6) Method of coating the raised surface of the raised structure with a solvent or decomposing agent.However, these conventional methods have problems with productivity, cost, quality and uniformity of the tapered state Because it is difficult to obtain products that are satisfactory in terms of strength and other aspects, it is difficult to mass-produce them, and even if they are produced, they are expensive.

Many proposals have been made regarding the conventional methods (1) to (4) above, but they are limited to only a small amount of fiber being processed per process, the processing speed is slow, only batch processing is possible, or There were problems such as large variations in tapering between processes or processes. Even if good tapered fibers are obtained, when applying them to pile fabrics or sliver knits to obtain a raised structure, the pile must be cut or sheared to obtain good quality. There was a problem in that the tip of the napped hair was cut off and the non-tapered part came out on the surface, impairing the appearance and texture.

Further, as a method for tapering the tip of the napped fabric in the state of a napped fabric, Japanese Patent Publication No. 48-4910 proposes a method in which the tip of the napped fabric is immersed in a treatment liquid. However, when carried out on an industrial scale, it is extremely difficult to uniformly immerse the raised part of a large area of fabric in a treatment solution, for example for fabrics with similar pile lengths such as velour, moquette, etc. There are problems such as it is extremely difficult to uniformly taper over a wide area due to difficulties in controlling the concentration and temperature of the liquid. Furthermore, as a method for tapering a raised fabric, Japanese Patent Application Laid-Open No. 55-57069 and Japanese Patent Application Laid-Open No. 56-58
As shown in Japanese Patent Application No. 067, etc., there is a method in which a viscosity treating agent such as a solvent or a decomposing agent is applied to the raised surface by coating or printing, and then heat treatment is performed.

However, with this method, the extremely short part at the tip of the piloerection becomes thin, but the viscous treatment liquid causes treatment spots, making it difficult to obtain the soft and firm texture that is the objective of the present invention. It does not become tapered.

<Problems to be Solved by the Invention> The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks and to make it possible to easily manufacture a high-quality raised structure having a uniform taper and having the feel of animal hair. An object of the present invention is to provide a method for sharpening the tip of a nape structure.

<Means for Solving the Problems> As a result of intensive studies by the present inventors in order to solve the above-mentioned problems, the inventors of the present invention have developed a process that includes a solubilizing agent or a decomposing agent in a raised structure composed of fibers that can be dissolved or decomposed and removed. It was discovered that the tip of the nap of the nap structure can be made sharp by applying heat treatment on one side only from the tip of the nap after impregnation with the liquid, which led to the present invention.

That is, in the present invention, a treatment agent containing a compound capable of dissolving or decomposing the fibers constituting the napped fibers is applied to at least a portion of the napped fiber structure including the tip of the napped hair, and then the treatment agent is applied from the napped tip side to the napped fiber structure. This is a method for tapering the tip of a napped fiber structure, which is characterized by performing a single-sided heating treatment.

In the present invention, the raised structure is not limited to product forms obtained by pile weaving, pile knitting, sliver knitting, tufting, electro-flocking, etc., and may also include plastic structures such as brushes. The present invention can also be applied to fiber bundles themselves made by bundling objects or slivers. The napped structure of the present invention is not limited to the length of the napped hair, but it is preferable that the napped hair is erect during treatment or that the direction of the napped hair is relatively uniform.

In the present invention, as the fibers constituting the nap, for example, polyester fibers, polyamide fibers, polyolefin fibers, etc. can be used. However, the present invention is not limited to these fibers, and any napped fibers forming the surface portion of the napped structure may be used as long as they can be dissolved or decomposed and removed, and are not genuine fibers.

Examples of solubilizers and decomposers used as processing agents for tapering include the following agents.

(1) Polyester fibers: tetrachloroethane/phenol mixture, sodium hydroxide, potassium hydroxide, etc. (2) Polyamide fibers: phenol, m-cresol, formic acid, etc. (3) Polyolefin fibers: carbon tetrachloride, tetrachloride The above-mentioned solubilizers and decomposers, such as ethane and cyclohexane, are used as they are, or in the form of an aqueous solution or dispersion, and a suitable dispersant, decomposition accelerator or penetrating agent is added thereto.

These are preferably selected appropriately depending on the type of fiber used, cross-sectional shape, fineness, heat treatment method and conditions, etc.

In the present invention, a treatment agent made by adding other additives as necessary to a solution or dispersion of the above-mentioned solubilizing agent or decomposing agent is applied to a raised structure, and the raised structure is subjected to one-sided heat treatment from the tip side of the raised raised structure. Although the tip is tapered, the part of the napped portion to which the treatment agent is applied may be appropriately selected depending on the desired texture of the napped structure.

For example, if it is applied only to the tip of the nape, only the tip of the nape will be sharpened and the root portion will remain as it is, making it possible to maintain the cushioning properties of the base material and impart a soft touch feel similar to that of animal hair. . Further, as a process advantage, since processing can be performed with a reduced amount of application, the heat treatment time can be shortened and energy can be saved.

Methods for applying only to the tip of the nap include the foam coating method from the tip of the nap, spray method, gravure method, etc. However, in terms of process, the foam can be controlled from a relatively large amount to a small amount of application. The coating method is suitable.

In addition, when applying to the entire piloerection area, in addition to sharpening the tip of the piloerection, the entire pilaf is dissolved or decomposed and made finer, so the entire product becomes soft and the tapered tip creates a soft touch sensation. have

As a method of applying the treatment agent to the entire raised part, the conditions for applying only to the tip of the raised part may be tightened to apply the treatment agent to the root of the raised part.

It is also possible to apply a treatment agent to the entire raised part by a padding method in which the entire raised structure is immersed in a treatment solution, but in this case, the entire raised structure is easily dissolved or decomposed, so it is difficult to apply the treatment agent to the entire raised part. Inconvenient aspects tend to occur, such as thinning, the need for chemical resistance of the base fabric member or backing agent, which limits the materials that can be used, and the amount of pick-up, which increases the heat treatment time.

Next, the raised structure to which the treatment agent has been applied is heat-treated on one side. Heat treatment is used not only to increase the temperature and speed up the processing speed, but also to sharpen the tip of the napped structure.
It is optional, it is optional, and it is necessary to go beyond the previous □. That is, in order to create a tapered state from the tip of the pilaf to the root, it is necessary to control the dissolution or decomposition rate so that it is fast at the tip and slow at the root. To achieve this, it is necessary to maintain a high temperature at the tip of the pilaf and lower the temperature toward the root, and to control the dissolution rate. Continuous heat treatment methods that can satisfy this condition include a cylinder dryer that can heat-treat the tip of the napped structure by bringing it into close contact with the heating body, or a cylinder dryer that heats the tip of the napped structure by heat radiation from the tip side of the napped structure. Conventional techniques for so-called single-sided heat treatment, such as infrared heating, can be applied. Regarding these heat treatment conditions, it is preferable to appropriately select the heating method, heating temperature, time, etc. based on the type of napped fiber, the content of the treatment liquid, and other treatment conditions.

The present invention is capable of making the tips of the naps tapered and obtaining the appearance and feel of animal hair by heat-treating one side of the nape tips from the tip side to which a treatment agent containing a dissolving agent or a decomposing agent has been applied as described above. Next, the contents of the present invention will be described in detail with respect to the case where the napped fibers are polyester fibers.

Polyester fibers are, for example, polyethylene terephthalate, polybutylene terephthalate, or polyesters made by copolymerizing these as main components with isophthalic acid, 5-sodium sulfoisophthalate, polyalkylene glycol, etc. Modifiers may be used as necessary. It also includes those to which additives have been added, and those composited or mixed with other hot melt polymers.

When the napped fiber is polyester fiber, a tetrachloroethane/phenol mixture, 0-chlorophenol, etc. can be used as a treatment agent, but from the viewpoint of handling and safety, an aqueous solution of alkali metal hydroxide or special sodium hydroxide is recommended. Preferably, the concentration is 5 to 500 g, preferably 10 to 300 g/12? 'be.

Tapering can be promoted by adding various accelerators such as quaternary ammonium salts as polyester hydrolysis accelerators, and the concentration used is preferably 0 to 50 g/e. Furthermore, various known penetrants such as dialkyl sulfosuccinates can be used in combination to uniformly apply the alkaline solution. Furthermore, when the treatment agent is applied by a foam coating method, examples of the foaming agent include sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, alkylamine oxide, butyl sulfate sodium salt, Many known surfactants such as butyl monoethylene oxide sodium salt can be applied, and the concentration used is 5 to 50.
gIQ. In addition, glycerin etc. are added as moisture absorbing ingredients.
0~300g#! When added, the taper condition is improved and the uniformity is also improved. Therefore, these treatment agents are applied to the raised structure by a dipping method, a foam blowing method, or the like. When applying by the dipping method, conventional techniques such as padding method can be applied, and the amount applied at that time depends on the content of the napped fibers such as the content of the fiber polymer, the number of napped fibers, the single fiber denier, the cross-sectional shape of the fibers, processing conditions, etc. It varies depending on the required appearance and texture, but in the case of sodium hydroxide, it is 20 ~
240g is appropriate.

In addition, in the case of the application method using foam, the Moeki treatment agent is stirred and mixed with air or an inert gas using a homomixer, a commercially available foaming machine, etc. to form a foam. At this time, the blending ratio, concentration, etc. of each component are adjusted so that the foaming ratio is in the range of 2 to 20 times, and the half-life of the foam is 2 minutes or more, preferably 5 minutes or more.

A method such as a knife coat method, a rotary screen method, or an applicator method can be applied as a method for applying this foam treatment liquid to the raised surface of the raised structure, and the amount of application is determined by the amount applied to the raised surface of the raised structure as described above. Although it depends on the characteristics of the material, in the case of sodium hydroxide, as in the padding method,
A suitable amount is 20 to 240 g per napped fiber Is''. Foam is a means of applying to the napped structure, and the applied foam treatment agent does not need to maintain its foam state until it is heat treated.

In this wet state, one-sided heat treatment is performed in which the raised structure is heated from the tip side of the raised ends. For single-sided heat treatment, infrared heat treatment using an infrared lamp or a cylinder dryer in which the tip of the nap is directly brought into close contact with a hot plate is used, but generally a cylinder dryer is suitable. When processing with a cylinder dryer, no special measures are required, but if too much tension is applied to the fabric, the raised part will be tilted and the side of the raised part will come into contact with the hot plate, causing it to break down and become thinner before the tip. Therefore, it is sufficient to reduce the tension to such an extent that no processing spots occur so that the raised portion of the raised structure stands relatively upright on the cylinder surface. The processing temperature and time are
It is preferable to select the solubilizing agent, decomposing agent, decomposition accelerator, etc. appropriately depending on the type and concentration of the used, the structure of the napped structure to be treated, the type of napped fiber, the cross-sectional shape, the fineness, etc. The temperature range is from 80 to 200°C, preferably from 100 to tSO, and the treatment time may be appropriately selected depending on the temperature conditions.

Effect〉 The reason why a napped structure with a tapered state can be easily obtained by treating the napped side of the napped fiber structure with a treatment liquid and then heating one side from the napped side in a wet state will be described. . In order to create a tapered state from the tip of the erect hair to the root, it is necessary to control the dissolution or decomposition rate so that it is fast at the tip and slow at the root. Generally, the solvent or decomposition rate is largely dependent on temperature, and the higher the temperature, the faster the dissolution or decomposition rate. Therefore, the temperature at the tip of the erect hair is high, and the temperature should be lowered toward the root to control the rate of dissolution or decomposition. A single-sided heat treatment method is a heat treatment method that can satisfy this condition. In other words, when one side is heated from the tip side of the nap containing the treatment liquid, the tip of the nap, which is the surface in contact with the heating element or the surface from which heat is radiated, heats up faster, but the heat is due to thermal conduction between the nap I & fibers and the treatment solution. Heat is transferred from the tips of the erect hairs to the roots with a temperature gradient that depends on the temperature, so the temperature at the roots and parts is low. When this one-sided heat treatment is completed at an appropriate timing, the product ends in a melted or decomposed state depending on the increased temperature and residence time. As a result, it is presumed that the dissolution or decomposition progresses at the tip, and the dissolution or decomposition does not progress toward the root, resulting in a tapered state.

<Effects of the Invention> As explained above, according to the method of the present invention, a nap structure for animal hair in which the tip of the nap structure is tapered in a tapered manner can be produced using a method completely different from conventional methods. It can be produced in large quantities at low cost without using any special equipment. In particular, in the past, it was extremely difficult to sharpen only the tip of a pile structure with a short pile part, but according to its nature, it is easy to sharpen the pile without making it deep into the root of the pile, thus improving the cushioning properties of the structure. It is possible to sharpen only the tip of the raised hair without damaging it. Furthermore, by adjusting the amount of treatment agent applied, it is possible to thin the pile threads from the root, making the entire pile structure flexible and sharpening the tip of the pile, allowing you to freely create animal hair-like shapes as needed. It has become possible to manufacture a raised structure with the feel and appearance of

The content of the present invention will be explained in detail in Examples below.
The present invention is not limited to these in any way.

<Example> Example 1 A polyester fiber (monofilament degree 2.5 dr, fiber length 51 as) made of polyethylene terephthalate as a pile component was filamented using a disperse dye with good alkali resistance, and then spun into 20 yarn yarn by cotton spinning. A moquette fabric (pile G:
2.5 mt, pile weight: 530 g/m") was woven. After backing with acrylic resin, poly lashing was performed and shirring was performed to equalize the nap length and used for tapering.

100g of sodium hydroxide as a decomposition agent for Water IQ as a treatment liquid for tapering, 20g of Mayformer F-210 (manufactured by Senkan Kagaku) as a foaming agent, and 20 g of Marceline PES (manufactured by Senkan Kagaku) as a decomposition accelerator. 100 g of glycerin was added as a moisture absorbent and foamed for 5 minutes at 9000 rpm using a homogenizer.

Therefore, using a knife coater, a foam treatment agent was applied to the raised surface of the moquette fabric prepared earlier at a rate of 450 per liter of fabric.
g was given. Next, the raised surface was brought into close contact with a hot plate of a cylinder dryer under such tension that the raised portion was kept relatively upright without tilting, and heat treated at 120° C. for 7 minutes. Thereafter, it was washed with warm water at about 40°C and dried.

When the tip of the napped surface of the treated moquette was observed under a microscope, the tips of the napped fibers were tapered into a tapered shape. The texture of the raised surface was also softer than that of the untreated product, indicating the effect of tapering. What's more, the cushioning properties of Moquette were still intact. Furthermore, the base fabric of the treated moquette remained in its initial state without being attacked by alkali.

<Example 2> A moquette similar to that in Example 1 was used for tapering.

A processing solution for tapering processing was prepared by mixing 112 parts of water with 100 g of sodium hydroxide as a decomposition agent, 20 g of Marceline P'ES (manufactured by Senkai Kagaku) as a decomposition accelerator, and long glycerin as a moisture absorbent. did.

Therefore, the previously prepared moquette was immersed in the treatment solution and squeezed to 190% with a mangle. Next, the raised surface was brought into close contact with a hot plate of a cylinder dryer in the same manner as in Example 1, and heat treated at 120° C. for 9 minutes. Thereafter, it was washed with warm water at about 40°C and dried. The base fabric of the treated moquette was attacked by alkali and the backing agent had fallen off, so it was re-backed with acrylic resin.

When the tip of the napped surface of the treated moquette was observed under a microscope, the tips of the napped fibers were tapered into a tapered shape. In addition, the texture of the raised surface was softer and animal hair-like compared to the untreated product, indicating the effect of tapering. Moreover, compared to the early cushioning properties of Moquette, the overall cushioning was supple and soft.

Comparative Example 1> Moquettes treated using the same moquette, treatment liquid, and treatment method as in Example 1 were heated at 120°C in a hot air dryer.
for 10 minutes and at 180°C for 9 minutes.

Thereafter, it was washed with warm water of about 40°C and dried.

When we observed a moquette that had undergone such treatment, we found that 12
In the product treated with 0° C.

In addition, in the case of treatment at 100° C. for 9 minutes, the base fabric of the treated moquette was attacked by alkali and the backing agent had fallen off, so it had to be rebacked with an acrylic resin. Hydrolysis progresses throughout the raised part, but unevenness can be seen on the raised raised surface due to unevenness.Hydrolysis also progresses from the base fabric part, so pile threads are seen falling off throughout the moquette. A so-called "thinness" had occurred. When the tip of the nape was observed under a microscope, there was a slight tapered part, but it was not a uniform taper, but the surface was uneven, and it was not enough to soften the texture. There wasn't.

Patent applicant RiRashi Co., Ltd.

Claims (4)

[Claims] (1) A treatment agent containing a compound capable of dissolving or decomposing the fibers constituting the napped fibers is applied to at least a portion of the napped fiber structure, including the tip of the napped fibers, and one side heat treatment is applied from the napped tip side. A method for tapering the tip of the nap of a nap fiber structure, characterized by: (2) The method according to claim 1, characterized in that the one-sided heat treatment is carried out by bringing the tip of the nape into contact with a heating body at 80 to 200°C. (3) The method according to claim 1, wherein the one-sided heat treatment is performed by radiating heat from the tip surface of the napped hair. (4) The method according to claim 1, wherein the fibers forming the nap are polyester fibers.