JPS5813800A - Production of nonwoven core fabric for heat bonding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for manufacturing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding, and more specifically, a method for producing a nonwoven interlining for thermal bonding. A thin port that is below Od.

This invention relates to a method for wet-processing non-woven interlining which is extremely suitable for thermal bonding from polyester short fibers, and its purpose is to produce a non-woven interlining for thermal bonding using polyester short fibers with fine fineness. To obtain a non-woven interlining 1 having suitable performance.

As is well known, nonwoven fabrics have come to be widely used as interlining materials, and interlining materials made by thermal bonding have also come to be used. The non-woven interlining used for this adhesive is required to have various properties, such as durability, uniformity, heat resistance, and dimensional stability during washing. □ Polyester fiber is the most preferable fiber for non-woven interlining from the viewpoint of these performances, but in order to use this preferable polyester fiber as interlining for thermal bonding, it goes without saying that staple fibers must be accumulated. There are two methods for producing a non-woven interlining, a dry method and a wet method, each of which has its advantages and disadvantages. In other words, although the dry method is superior in various respects,
If the material is short fibers with a thin edge thickness of less than d, it is difficult to make cards, and its manufacture is almost impossible.
However, even with this wet method, the flexibility of the nonwoven fabric obtained could not be said to be satisfactory.

As a non-woven interlining for thermal bonding, it is desirable that it not be coarse or hard, that is, be highly flexible, and that it can always behave in the same way as the outer material. It is preferable that the fineness of the fibers constituting the woven interlining is as fine as possible, and from this point of view, it is difficult to use the dry method as described above to create a nonwoven fabric, and it is difficult to use the wet method. It had no choice but to be adopted.

Therefore, even if a nonwoven fabric is obtained using fine-grained short fibers by a wet process, the flexibility of the nonwoven fabric obtained is more flexible than a nonwoven fabric with a large fineness obtained by a dry process.
It wasn't something to be satisfied with.

This is an aggregate of short fibers: 1. l, , , = due to the binder in the wet bath that is necessary to maintain the morphology of the woven fabric. Therefore, if the concentration of binder is high, the nonwoven fabric will become rough and hard plate-like, and on the other hand, if the concentration is low, the bonding force between the constituent short fibers will be weak and the shape retention will be poor, so the concentration should be set below the binder concentration. Therefore, even if the single fibers were made thinner, there was a limit to the flexibility of the nonwoven fabric, and no greater flexibility could be expected.

As mentioned above, the inventor believes that the most effective way to obtain a flexible nonwoven fabric is to reduce the fineness of the single fibers used, and for this reason, the manufacturing method has no choice but to rely on a wet process. In order to highly improve the flexibility of the nonwoven fabric obtained by improving the rough hardening caused by the binder in the papermaking bath in this wet method, we have conducted various studies and experiments. After mixing about 70 to 30 parts, preferably about 50 parts, and making paper in a bath liquid without a binder,
When it is thermally bonded to the outer fabric, the heat ′□′: ,,,
.

By performing pinpoint heat embossing at a temperature above the bonding temperature, the nonwoven interlining obtained has extremely satisfactory flexibility, which is the result of the present invention.

The short polyester fibers used in the present invention are short polyester fibers obtained according to a conventional method, and the fineness of the single fibers is 2.0 d or less, preferably 2.0'd'l. There is no problem even if a material with a fineness exceeding that of the nonwoven fabric is used, but the fineness is such that it is preferable to manufacture the nonwoven fabric by a wet method because it is difficult to damage the card when a dry method is used to obtain a nonwoven fabric. The low melting point polyester short fibers used in the present invention are 255°C to 260°C, which is the melting point of polyester fibers obtained by conventional methods.
It is a polyester fiber obtained by having a melting point at a temperature lower than that of the polyester fiber. The fineness of the single filament is preferably about 2 to 10 times, particularly preferably about 3 to 5 times, that of polyester fiber obtained by a conventional method.

If the fineness of the low-melting point polyester fiber is less than twice that of the polyester fiber obtained by a conventional method, there will be too many points of contact between the short fibers, resulting in a hard texture of the nonwoven fabric, and Since the strength of the contact point is low, if it is used as an interlining, it will become more fluffy when washed. 'Furthermore, if it is 10 times as large, the contact point will be too large and the nonwoven fabric will feel rough and stiff.

In the present invention, short polyester fibers obtained according to a conventional method and short polyester fibers with a low melting point are mixed and supplied into a bath solution to form paper. 7 polyester fibers with low melting point
The polyester fiber with a low melting point is preferably within the range of 0 to 30 inches; if the polyester fiber has a low melting point of less than 30 inches, the strength of the resulting non-woven fabric decreases, and if it is 2 or more than 70 inches, it is undesirable. The nonwoven fabric becomes stiff, which is also undesirable. Although it depends on the single fiber fineness of the low melting point polyester fiber used, the preferred mixing ratio is around 50 inches.

Polymer obtained according to the conventional method used in the present invention
It is preferable that the devised chilled fiber be used alone, but it is permissible to mix in fibers such as rayon that do not cause shrinkage due to heat or have an unfavorable effect on the obtained nonwoven fabric, such as becoming coarse and hard. No, but it is thought to be about 20 cm of conventional polyester fiber.

Although the paper-making bath of the present invention does not contain any binder used in a normal wet method, it is not necessary that the paper-making bath does not contain any binder used in a wet method or a similar binder. A substance having an effect may be added to the papermaking bath, but it acts as a binder.

It may be added in an amount that does not have any effect.

Although the basis weight of the nonwoven fabric produced in the present invention is arbitrary, it is usually about 10 to 4097 m''.

In the present invention, the wet nonwoven fabric immediately after papermaking is dried and then passed through a heated pinpoint embossing roll, but there are no particular conditions for this drying, and the drying temperature is controlled by the constituent fibers. Naturally, consideration must be given to ensuring that there is no thermal influence on the

In the present invention, this pinpoint heat embossing is preferably performed using a heated pinpoint embossing roll, and in this case, the heating area of the pins, the density of the pins, etc. may be selected as appropriate.

In the present invention, the process from the papermaking process to the pinpoint process may be carried out continuously by drying the i-shaped product and then performing binpoint heat embossing as it is.
It is also possible to carry out a discontinuous process in which the dried material is subjected to pinpoint heat embossing in a separate process, especially in the latter case, or even if the paper is made in a papermaking bath without a binder. The nonwoven fabric can sufficiently maintain its shape due to the intertwining of the constituent fibers.

In addition, the temperature of pinpoint heat treatment and embossing must be higher than the melting point of the low-melting point polyester fiber, but when the obtained nonwoven fabric is used as an interlining for thermal bonding, Interlining and front! : Iib&t-nio, =; □]. □□Good morning.

Must be at 180'C to 220°C; usually 180'C to 220'C
It is appropriately selected within the range of °C.

During pinpoint heat embossing, the low melting point polyester fibers in the areas of the nonwoven fabric where the pins contact and pressure soften and melt and fuse with other fibers to bond the fibers together, while the areas where the pins do not contact In this case, only the low melting point polyester fibers in that part are heat set by the heat of the embossed gelol.

Since the nonwoven fabric obtained by the present invention has extremely suitable physical properties as a material for interlining for thermal bonding, the nonwoven fabric may be subjected to treatments necessary for thermal bonding, such as:
When thermal bonding powder is sprinkled on a nonwoven fabric and then fixed onto the nonwoven fabric by heating or other means to make a thermal bonding interlining, it becomes an extremely good bonding interlining. However, it is possible to use it not only as a nonwoven fabric but also as other nonwoven fabrics.

Next, the present invention will be explained in more detail with reference to Examples.
□ Single yarn fineness obtained according to the usual method is 0.5d and short fiber length is 7
50% by weight of m+ polyester staple fibers and 50% by weight of low melting point polyester staple fibers with a melting point of 140°C with a single filament fineness of 3d and a staple fiber length of 5m in the presence of an appropriate dispersant in a papermaking bath. The material was dispersed and mixed, made into paper to have a basis weight of 30II/m2, dried at a temperature of 120°C, and then pins with a diameter of 1 inch were planted at 3m intervals on both the front and back, left and right sides, and heated to 200°C. The nonwoven fabric obtained by applying bottle point heat embossing through the embossing roll exhibited the following physical properties.

Texture: Very flexible. □Tensile strength
: Length 1.5 k17 inches Width 7001Δinches
Size: Length: 40 inches Width: 84% shrinkage Iron (170℃) Length: 1% Width 1st Example Example 2 The nonwoven fabric obtained in Example 1 was coated with 120 mesh~
250 mesh nylon 12 powder 20g/m
The powder was spread to give an adhesive interlining by fixing the powder with infrared heat. This interlining was much more flexible, more uniform, and had better dimensional stability than the interlining made of dry nonwoven fabric.

As explained in detail above, the present invention is composed of polyester fibers that can maintain the most desirable performance as a nonwoven fabric and as an adhesive interlining made of nonwoven fabric, and furthermore, the monofilament fineness of the polyester short fibers that are the material is In the production of non-woven fabrics, it is necessary to adopt a wet rolling method in order to obtain non-woven fabrics with a fineness that is difficult to card, a homogeneous distribution of short fibers, and high flexibility. Despite the fact that there is no binder in the wet method, it is possible to obtain a nonwoven fabric by ensuring the bonding of the constituent short fibers and without impairing its flexibility at all. The non-woven fabric is composed of fine-grained short fibers, so its flexibility is not inhibited at all (100% utilization is achieved, and the short fibers are evenly dispersed to create a highly uniform non-woven fabric. The processed adhesive interlining also has high performance without any loss in these properties, has a high degree of symmetry, has a luxurious feel, integrates well with the outer fabric, and is sufficiently lightweight, etc. This is an excellent invention that yields an extremely good interlining material.

Patent applicant: Dynic Co., Ltd.

Procedural amendment (voluntary) 1 October 1980 2000 Commissioner of the Patent Office Shima 1) Tonoro Haruki 1, Indication of the case Patent Application No. 111549 of 1982 Method of manufacturing non-woven interlining base material for thermal bonding 3 Amendment. Relationship with the case involving the person who filed the patent application Patent applicant address 26 Nishikyogoku Daimon-cho, Ukyo-ku, Kyoto-shi, Kyoto Name
Dynic Co., Ltd. Representative Director and President: Sakabe, Miyoshibe 4, Agent: 183 Telephone: 0425-76-3062 Address: 66-4-13 Kitayama-cho, Fuchu-shi, Tokyo Details of the amendment As shown in the attached sheet (submission of amended statement) detail
Document 1. Name of the invention Method for manufacturing non-woven interlining base material for thermal bonding 2. Claims - Thin polyester short fibers with a single filament fineness of 1.0 d or less, and low softening point polyester short fibers. About 70 to 30, preferably about 50, of low softening point polyester short fibers are mixed with the polyester short fibers, and the paper is formed in a bath solution without a binder, and then thermally bonded to the outer material. A method for producing a nonwoven interlining base material for thermal bonding, characterized by performing pinpoint heat embossing at a temperature higher than the thermal bonding temperature when bonding. The manufacturing method of the woven interlining base material, more specifically, the single yarn fineness is 1. The present invention relates to a method for wet-processing a nonwoven interlining base material that is extremely suitable for thermal bonding from fine polyester short fibers having a diameter of less than Od. The object of the present invention is to obtain a nonwoven interlining base material made of fibers and having properties suitable as a nonwoven interlining base material for thermal bonding.

As is well known, nonwoven fabrics have come to be widely used as interlining materials, and interlining materials made by thermal bonding have also come to be used. The nonwoven interlining base material for thermal bonding is required to have various properties, such as durability, uniformity, heat resistance, and dimensional stability during washing.

From the viewpoint of these performances, polyester fiber is the most preferable fiber for non-woven interlining base material, but in order to use this preferable polyester fiber as interlining base material for thermal bonding, it goes without saying that short fibers must be used. They are accumulated to form a non-woven interlining base material, and there are dry and wet methods for making this non-woven fabric, both of which have advantages and disadvantages. In other words, although the dry method is superior in various respects, it is difficult to apply to cards when the material is short fibers with a fineness of 1.5 d or less, and its production is almost inefficient. Although it is possible and requires a wet method, the flexibility of the nonwoven fabric obtained by this wet method cannot be said to be satisfactory.

As a non-woven interlining base material for thermal bonding, it is desirable to have properties such as not being rough and hard, that is, being highly flexible, and being able to always behave in the same way as the surface. It is preferable that the fineness of the fibers constituting the nonwoven interlining base material be as fine as possible, and from this point of view, it is difficult to use the dry method as described above to make a nonwoven fabric. , we have no choice but to adopt the wet method.

It was something.

Therefore, even when nonwoven fabrics are obtained using fine-grained staple fibers by the wet process, the flexibility of the nonwoven fabrics obtained is not as satisfactory as that of large-fine nonwoven fabrics obtained by the dry process. Ta.

This is due to the binder in the wet bath, which is necessary to maintain the form of the nonwoven fabric, which is an aggregate of short fibers. Therefore, if the binder concentration is high, the nonwoven fabric will become rough and hard, and on the other hand, if the binder concentration is low, the bonding force between the constituent short fibers will be weak and the shape retention will be poor. Therefore, even if the fineness of the single fibers was made finer, there was a limit to the flexibility of the nonwoven fabric obtained, and it was not possible to achieve greater flexibility.

As mentioned above, the present inventor has found that in order to obtain a flexible nonwoven fabric, it is necessary to use a wet method by reducing the fineness of the single fibers used. As a result of various studies and experiments in order to highly improve the flexibility of the obtained nonwoven fabric by improving curing, low softening point polyester staple fibers account for about 70 to 30% of the polyester staple fibers, preferably 50%.
After forming the paper in a bath liquid without a binder, pinpoint heat embossing is performed at a temperature higher than the heat bonding temperature at which it is heat bonded to the outer fabric on the heel. The nonwoven interlining substrate obtained by the present invention has extremely satisfactory flexibility.

The polyester short fibers used in the present invention are short polyester fibers obtained by a conventional method, and the fineness of the single fibers is 2. Od or less, preferably 1.5d to 0
．． A material with a fineness of about 5 d is used, but there is no problem in using a material with a fineness exceeding 2.0 d. When obtaining a nonwoven fabric using a dry method, it is difficult to form a card, so it is difficult to produce a nonwoven fabric that relies on a wet method. is of a preferable degree of fineness. Further, the polyester short fibers having a low softening point are used in the present invention. 38. c~240. It is a polyester fiber obtained by having a low temperature and softening point. The fineness of the single filament is preferably about 2 to 10 times, particularly preferably about 3 to 5 times, that of polyester fiber obtained by a conventional method.

If the fineness of the low softening point polyester fibers is less than twice that of polyester fibers obtained by conventional methods, there will be too many points of contact between the staple fibers, and as a result, the texture of the nonwoven fabric will be stiff. Since the strength of each contact point of the mat is low, if it is used as an interlining, it will become more fluffy when washed. 10 more
When it is double the size, the contact point becomes too large and it feels like a non-woven fabric.
The structure is rough and stiff.

In the present invention, short polyester fibers obtained according to a conventional method and short polyester fibers with a low softening point are mixed and supplied into a bath liquid to make paper. It is preferable that the amount of polyester fiber with a low softening point is within the range of 70% to 30% of the polyester fiber, and if the content of polyester fiber with a low softening point is less than 30%, the strength of the obtained nonwoven fabric will decrease, which is not desirable. If it is 70 inches or more, the resulting nonwoven fabric becomes hard, which is also undesirable.

Although it depends on the single fiber fineness of the low softening point polyester fiber used, the preferred mixing ratio is around 50%.

The polyester fiber obtained according to the conventional method used in the present invention is preferably used alone, but does not have any undesirable effects on the obtained nonwoven fabric, such as shrinkage or roughness due to heat. Although there is no problem with the inclusion of fibers such as rayon, it is thought that the amount is about 20% of that of conventional polyester fibers.

Although the papermaking bath of the present invention does not use any binder used in the normal wet method, it is not necessary to exist in the papermaking bath at all, and the binder used in the wet method or the binder used in the wet method does not need to be present in the papermaking bath at all. A substance having a similar effect may be added to the papermaking bath, but it is important to add it in an amount that does not have any effect as a binder.The basis weight of the nonwoven fabric produced in the present invention is In the present invention, the wet nonwoven fabric immediately after papermaking is dried and then passed through a heated pinpoint embossing roll. During drying, there are no special conditions for waxing or pressing, and it goes without saying that the drying temperature should be taken into account so as not to affect the heat intensity on the constituent fibers. .

In the present invention, it is preferable to carry out pinpoint heat emporing, and in this case, the heating area of the pins, the density of the pins, etc. may be appropriately selected.

In the present invention, from the papermaking process to the pinpoint process, the papermaking process may be carried out by drying the papermaking process, and then the process may be carried out directly.Alternatively, the papermaking process may be followed by pinpoint heating of the dried product in a separate process. It may be carried out in a discontinuous process of embossing, and even in the latter case, the nonwoven fabric can sufficiently maintain its shape due to the entanglement of the constituent fibers, even if the paper is made in a papermaking bath without a binder.

In addition, the temperature of pinpoint heat embossing needs to be higher than the softening point of polyester fiber with a low softening point, but if the obtained nonwoven fabric is used as an interlining for thermal bonding, The temperature must be higher than the thermal bonding temperature of the adhesive that bonds the interlining and outer fabric.
Usually, the temperature is appropriately selected within the range of 180°C to 220°C.

During pinpoint heat embossing, the low softening point polyester fibers in the areas of the nonwoven fabric that are contacted and pressed by the pins heated to 180°C to 220°C soften to a state just before melting and fuse with other fibers. At the same time, in the areas where the pins do not contact, only the low softening point poly(1) .

In other words, the low softening point polyester fibers set by the heat of the embossing gel will no longer soften and remain thermally stable even if a temperature below the temperature applied during embossing is applied. Therefore, even if it encounters a temperature lower than the temperature during embossing, there is no dimensional deformation, and it can be said that the thermal adhesive interlining base material has extremely good dimensional stability.

The non-woven interlining base material obtained according to the present invention maintains extremely suitable physical properties as a base material for thermal bonding. For example, spraying thermal bonding powder on the non-woven interlining substrate,
Heat this with other hands.

When used as an interlining for heat bonding by fixing it on a non-woven interlining base material with steps, etc., it becomes an extremely good adhesive interlining, but it can also be used not only for this purpose but also for other non-woven fabrics. Of course, it is also possible.

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

Example 1 Polyester short fibers with a single yarn fineness of 0.5 d and a short fiber length of 7WIII+ obtained according to a conventional method were used at a weight factor of 50, and a softening start temperature at which the single yarn fineness was 1.5 d and the short fiber length was 5 m. 50 weight of low softening point polyester short fibers at 100°C are dispersed and mixed in a paper making bath in the presence of an appropriate dispersant, and 30 f.
/W? The paper is made to a basis weight of The nonwoven interlining substrate obtained by embossing exhibited the following physical properties.

Wind: Very flexible.

Tensile strength: Vertical 1.5Kf/inch Width 700f
iI inch elongation: length: 40% width: 84 inches Shrinkage rate Iron (170°C) length: 1 inch width: 1% Example 2 Nylon 12 of 120 mesh to 250 mesh was added to the nonwoven interlining base material obtained in Example 1. of powder at 20f/
-, and the powder was fixed using an infrared heater to obtain an adhesive interlining.

This material is much more flexible and more uniform than those made of dry-processed nonwoven fabric as an adhesive interlining.

The interlining also had excellent dimensional stability.

As explained in detail above, the present invention can maintain the most preferable performance as a nonwoven fabric and as an adhesive interlining made of a nonwoven fabric. It is composed of 341J ester fibers, and the monofilament fineness of the polyester staple fibers used as the material is such that it is difficult to card in dry process non-woven fabric production. In order to obtain a nonwoven fabric with uniform distribution and high flexibility, a wet manufacturing method is necessary, but the bonding of the constituent short fibers is ensured without the use of a binder in the wet method. However, because of this, a nonwoven fabric can be obtained without any inhibition on its flexibility, and since the obtained nonwoven fabric is composed of short fibers with a fineness, its flexibility is fully utilized without any inhibition at all. The short fibers are uniformly dispersed to obtain a highly uniform nonwoven fabric, and the adhesive interlining that will be processed from this has high performance without any loss of these properties, has a high degree of uniformity, and has a luxurious feel. This is an excellent invention that provides an extremely good interlining that integrates well with the outer fabric, is sufficiently lightweight, and is □.

Patent applicant: Dynic Co., Ltd. Agent: Patent attorney Echio Nagasawa

Claims (1)

[Claims] Thin polyester short fibers with a single filament fineness of 1.0 d or less and low melting point polyester short fibers are coated with 70 to 70% of the low melting point polyester short fibers to the polyester short fibers.
After mixing about 30 g, preferably about a50 g, and forming the paper in a bath solution without a binder, it is subjected to bottle point heat pre-bossing at a temperature higher than the thermal bonding temperature at which it is thermally bonded to the outer material. Characteristic manufacturing method of non-woven interlining for thermal bonding