JP2864442B2 - Ring-shaped nonwoven fabric and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION An object of the present invention is to provide a new material by using a nonwoven fabric.

[0002]

2. Description of the Related Art Conventionally, a ring-shaped cushioning material has been manufactured by manufacturing a ring-shaped bag and filling the bag with cotton or the like.

[0003]

However, the cushioning material manufactured in this manner has a problem that the cushioning material packed in the cushioning material is shifted or the cotton is broken.

[0004]

Means for Solving the Problems The present invention has an internal
It has a ring-shaped linear joint, from which radially
Characterized in that it has a cross section of a shape having a stretched pleat
A three-dimensional non-woven fabric having a ring-shaped non-woven fabric , preferably a three-dimensional non-woven fabric having a radial fold and a cross-sectional shape continuous in the longitudinal direction. This ring-shaped nonwoven fabric is formed by forming a ring-shaped linear joint portion on one or a plurality of laminated nonwoven fabrics, and cutting the ring-shaped linear joint portion into a ring shape on the inner side and the outer side. To manufacture.

In the present invention, as shown in FIG. 1, a ring-shaped linear joint 2 is formed on one or a plurality of non-woven fabrics 1 to form a strong non-woven fabric having a predetermined thickness. By forming a portion and cutting the nonwoven fabric inside and outside of the ring-shaped linear joining portion 2, the thickness of the nonwoven fabric at the cut portion is recovered, and the nonwoven fabric is integrated at the fold joining portion made of nonwoven fabric pieces. Further, a ring-shaped three-dimensional nonwoven fabric having a cross section with radial folds is obtained.

[0006] The material of the nonwoven fabric is not particularly limited, but is preferably bulky and excellent in compression recovery. The nonwoven fabric and the fibrous web bonded by heat-treating the fibrous web containing the adhesive fiber under no pressure or low pressure are preferable. Non-woven fabric sprayed with adhesive, sprinkled with adhesive resin powder on fibrous web, heat-treated under no pressure or low pressure to bond non-woven fabric. A non-woven fabric or the like in which is temporarily bonded can be suitably used. If necessary, a woven fabric, a knitted fabric, a net, a film, and the like may be laminated together with the nonwoven fabric. The linear joint 2 may be linear or wavy, solid, broken, or dotted. In addition, the joining part is a sealing means such as a heat seal, an ultrasonic seal, a high frequency seal,
It can be formed by a bonding means by applying an adhesive or a sewing means by sewing such as a sewing machine. In the case of using a sealing means or an adhesive means, the width of the linear joint is preferably 1 to 5 mm. If thermoplastic fibers cannot be used as the constituent fibers of the nonwoven fabric, an adhesive means or a suturing means should be used. However, if they can be used, a joint means having a higher tensile strength can be formed by using a sealing means.

[0007] The ring-shaped linear joint is circular, elliptical,
Any closed shape such as a polygon or a shape with rounded corners may be used, but a circle or an ellipse is preferred. The cut of the nonwoven fabric on the inner side and the outer side of the nonwoven fabric on the ring-shaped joint may not be the same shape as long as the cut is a ring. However, the cut shape is preferably similar, and more preferably similar to the joining line. As shown in FIG. 1, when a concentric circle is cut on the inside and outside of the circular linear joint, a donut-shaped three-dimensional nonwoven fabric is obtained. In addition, in addition to the above-described manufacturing method, a linear joint is formed at intervals in one or a plurality of laminated nonwoven fabrics, and the nonwoven fabric is cut between the linear joints and the linear joint. This produces a cylindrical non-woven fabric having a cross section of a shape having radial folds, and a ring-shaped non-woven fabric is produced by joining both ends of the cylindrical non-woven fabric with an adhesive or a joining means such as heat fusion. May be. However, in this case, since the same length is used for the outer circumference and the inner circumference, the appearance and the like are inferior to those according to the above-described manufacturing method in that distortion occurs on the inner circumference side.

The production by the method of the present invention will be specifically described with reference to an example. One or a plurality of nonwoven fabrics containing heat-fusible fibers are laminated, and the lamination thickness (Tcm) is set to a slit width (Wcm). Set so that 2T ≧ 45/360 × πW. (Depending on the material of the nonwoven fabric, 2T <45
/ 360 × πW makes it difficult to obtain a three-dimensional nonwoven fabric satisfying the physical properties required for the present invention). The set product is continuously sealed (heat, ultrasonic wave, high frequency) or stitched at a constant width interval, and then cut into Wcm width. When the relationship between the lamination thickness and the slit width is 2T <πW, the sectional shape is a petal shape as shown in FIG. 2, and when 2T ≧ πW, the sectional shape is as shown in FIG. Is a mall shape (circular shape)
Becomes At least 20% (preferably 3%)
5%) or more containing heat-fusible fibers and / or heat-fusible resin (mesh and woven fabrics are also possible).
Strings and wires can be inserted into the seal portion to further increase the strength.

The relationship between the cross-sectional shape, the lamination thickness (Tcm) and the slit width (Wcm) of the ring-shaped nonwoven fabric is as follows. (1) When the linear joint is at the center of the slit width a. When 2T <πW, a gap is formed between the folds,
Open like a petal. (2T ≧ (1 / 3πW to 1 / 4πW)
In the case of, the petals open uniformly and 2T <(1 / 3πW ~
(1 / 4πW), the petals tend to open unevenly. B. When 2T ≧ πW, the gap between the folds is eliminated, and the fiber layers on the outer peripheral surface are connected to form a molding. (If the thickness Tcm further increases due to the compression at the time of sealing, it may become a molding even at 2T <πW.) (2) When the linear joint is not at the center of the slit width, as shown in FIG. distance from the cutting line to one of the joint is as long as W _1, when the distance to the other joint portion is short and W _2, when T <the πW _1, becomes petals, T
When ≧ πW _2, the shape becomes a molding.

As a joining method, when an adhesive component is contained in the nonwoven fabric itself, it is preferable to use a sealing means such as an ultrasonic seal, a high frequency seal, a heat seal or the like. Since the shape of the seal portion is continuous, the strength is improved. I do. In addition, it is also possible to seal discontinuously. The seal width may be any value, but a width of 1 to 5 mm is preferable. When strength is required, a larger width is better. In order to reinforce the strength, a string, a mesh, or a woven or knitted material may be put on the sealing portion or on the entire surface. When a thermoplastic fiber is used as the adhesive component in the nonwoven fabric, it is desirable that the nonwoven fabric be composed mainly of polyolefin, polyester, polyamide, polyvinylidene chloride, and acrylic fibers. In the case of vinylon or polyvinyl alcohol fiber, it can be sealed with wet heat and pressure. The direction of the seal may be either the vertical direction or the horizontal direction. The ratio of these thermoplastic fibers varies depending on the required tensile strength, flexibility, or the width of the seal portion and the thickness of the seal portion, and the type of fibers involved in the adhesion in the laminated nonwoven fabric. It is desirable that the proportion of the fibers involved in the heating be at least 20 wt% or more, preferably 40 wt% or more. Even if less than 20 wt%, a seal can be obtained, but it is not suitable for applications requiring high tensile strength and shape retention. However, these problems can be solved when sealing with a hot melt adhesive and when inserting a string or a mesh knitted fabric as a reinforcing material. Also,
Adhesive means using an adhesive may be used as a means for forming a linear joint, and in this case, an adhesive (for example, ethylene and an ethylene copolymer, a copolymer polyamide, a copolymer polyester, a polypropylene, a vinyl acetate copolymer, Cellulose derivative, acrylic resin, polyurethane)
What is necessary is just to press-fit (press-fit) while compressing a base material.

The material obtained by the present invention has, for example, the following uses depending on the respective functions. For scouring and brushing, scourers, loofahs, car wash brushes, household scrubbers are used.Carriers are microbe-immobilized carriers for water purification, artificial seaweed, artificial soil, and filters are liquid filters and air conditioning filters. As materials, drainage materials for drainage pipes and civil engineering, as materials for absorbing water, bees perspiration, water absorbing pads, anti-condensation materials, and as oil absorbing materials, oil catchers, oil fences,
Oil absorbing material is used as a heat insulator, ear pad, cold muffler,
The hood is used as a sound absorbing material for absorbing sound in the duct, the shock absorbing material is used for corners, protectors, gym mats, etc.The cushioning material is used for hemorrhoid patients such as cushions, wadding, cushions, pillows and backrests Used as such.

[0012] The use and the material and shape of the raw materials will be further described. For the purpose of purifying water and for the carrier for immobilizing microorganisms, BOC, CO such as rivers, lakes and marshes, and the sea can be used.
D, nitrogen, useful microorganism immobilizing material for the purpose of reducing phosphorus,
Since it becomes a fishing reef and artificial seagrass, the shape is desirably an open shape like a petal. This microorganism in water, dissolved O _2, is for increasing the chance of contact between nutrients and the diameter of the cross section 3~12cm is preferred. If it is larger than 3 cm, the contact area increases, and if it is smaller than 12 cm, water easily penetrates into the inside. As the fiber composition, for example, a single or composite thermoplastic fiber such as polyolefin, polyester, polyamide, polyvinyl chloride, or polyvinylidene chloride is desirable. Non-thermoplastic fibers such as viscose rayon and cotton may be included for the purpose of imparting hydrophilicity or a carbon source. The structure (fineness) of the nonwoven fabric has an average fineness of 1
It is preferably 0 denier or more, and if the fineness is too small, clogging may occur. The apparent density of the nonwoven fabric before sealing is preferably 0.2 g / cm ³ or less from the viewpoint of clogging.
The nonwoven fabric may be a nonwoven fabric by fiber bonding or a nonwoven fabric by binder bonding, and may be subjected to a polymer treatment or an ion exchange treatment for increasing the amount of immobilized microorganisms. The number of layers is suitably 3 to 6 (the number of petals is 6 to 12), and the thickness of one sheet is preferably about 3 to 15 mm. Also,
In order to reduce the thickness of one petal, reduce the number of the petals, and open the petals evenly, as shown in FIG. 5, a thin, dense, wide non-woven fabric 4 and a thick, elastic, narrow non-woven fabric 5
Can be achieved by alternately stacking and sealing the center. When used as a scourer or an abrasive, cushioning properties, rebound resilience, and abrasion resistance (especially of a slit cross section) are required, so that the end face of the fiber is preferably exposed. As the shape, a structure in which the gap between the petals is not so open or a structure in which the petals are stuck together to form a mall is good. Further, the slit may be meandered. As the fiber composition, polyamide, polyester, polyolefin, PVC, or the like is used, and a fiber having high rigidity is preferable.
As the nonwoven fabric structure, it is preferable to use an adhesive in addition to the bonding with the heat-fused fiber in order to improve the wear resistance. The adhesive component (including the adhesive fiber) is preferably 30% or more.
The fineness varies depending on rough polishing and finish polishing, but is preferably 0.1 denier to 100 denier, and an abrasive (for example, carborundum) may be applied (adhered). When used for Christmas decoration, clothing (preferably sewing the seal part, compressing and sewing), eraki maki, accessories, cushions for hemorrhoid patients, the tactile sensation is important, and the shape is folds. It is preferable that there is no gap between the folds. Fiber composition, polyamide, polyester, acrylic, polyolefin, rayon, cotton, etc. are used, as the structure of the non-woven fabric,
The fineness is as good as 0.1 to 12 deniers, and it is preferable to use a high crimp fiber or latently crimped fiber to give a soft feeling of volume and touch and heat retention.

[0013]

【Example】

Example 1 Weight 20 made of Chisso ES fiber (denier 20 denier)
0 g / m ² , thickness 8 mm, apparent density 0.025 g / c
Five heat-fused nonwoven fabrics of m ³ are laminated and ultrasonically sealed in a ring shape. Next, the inside and outside of the seal portion are each 2c.
The slit is formed in a ring shape similar to the seal portion to a width of m.
In this way, a petal having a diameter of about 4 cm and a cross section of 10 petals was formed, the inner periphery was in close contact, and the outer periphery was open.
A ring-shaped non-woven fabric is formed. This ring-shaped nonwoven fabric,
It is effective when used as a biofilm purification carrier and a useful microorganism-immobilization carrier for ponds, lakes, rivers, seas, and industrial wastewater.

Example 2 A non-woven fabric was prepared by adhering a benzyl halide 4-vinylpyridine-styrene copolymer as a microorganism-adsorbing polymer to the non-woven fabric base used in Example 1.
As described above, a laminate obtained by laminating five sheets and then sealing and slitting is excellent in the ability to adsorb microorganisms and is useful as a carrier for immobilizing microorganisms.

Example 3 An acrylic adhesive was applied to a web of polyamide fiber having a fineness of 30 denier to prepare a nonwoven fabric having a fiber / binder ratio of 60/40, a basis weight of 350 g / m ² , and a thickness of 15 mm.
After stacking eight nonwoven fabrics and sealing them in an elliptical ring shape using an ultrasonic welder in the longitudinal direction, slits are formed in an elliptical ring shape so that the inner and outer sides have a width of 5 cm around the seal portion. The cross section of the laminated non-woven fabric spreads in a circle, and has an elliptical ring shape rich in elasticity with no gap between the non-woven fabrics. This nonwoven fabric is useful as a substitute for a loofah rubbing the body, and as a scrubber for bath cleaning when wrapped around a hand.

[0016] Example 4 fineness 6 denier, basis weight 300 g / m ² to high crimp type core component polyethylene terephthalate and the sheath component is composed of core-sheath composite fibers of polybutylene terephthalate,
A non-woven fabric having a thickness of 25 mm is prepared. After laminating six non-woven fabrics, compressing and sewing with a sewing machine to form a circular seamed portion having a diameter of 16 cm, and slitting the inner and outer sides of the seamed portion into circular shapes of 12 cm and 20 cm in diameter, respectively. Thus, a molded ring-shaped three-dimensional nonwoven fabric having a cross section of about 8 cm in diameter is manufactured. This ring-shaped nonwoven fabric has a soft touch and rich cushioning properties, cushions for hemorrhoid patients, cushions for decorations such as Christmas and clothing,
It is useful for stuffing and cold weather malls.

[0017]

According to the present invention, a ring-shaped three-dimensional nonwoven fabric having a radially folded pleated cross section with high tensile strength can be easily produced. Because it is ring-shaped, it is suitable as a cushion material for hemorrhoid patients,
Materials with many uses can be provided, and development of new products in various fields can be expected.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state of a manufacturing process of a ring-shaped nonwoven fabric of the present invention.

FIG. 2 is a cross-sectional view showing an example in which the cross-sectional shape of the ring-shaped nonwoven fabric of the present invention is petal-shaped

FIG. 3 is a cross-sectional view showing an example in which the cross-sectional shape of the ring-shaped nonwoven fabric of the present invention is a molding (circular).

FIG. 4 is a cross-sectional view of the ring-shaped nonwoven fabric according to the present invention in which the distance from the joint to the cutting line is different on the left and right

FIG. 5 is a cross-sectional view of the ring-shaped nonwoven fabric of the present invention in which nonwoven fabrics having different widths are laminated.

[Brief description of reference numerals]

The distance to the cutting line from the distance W ₂ junctions from 1 nonwoven fabric 2 wide-rich ring wide nonwoven 5 thick elastic at junction 3 cutting line 4 dense of the narrower nonwoven W ₁ joint to the cutting line

Claims (3)

(57) [Claims] 1. A method according to claim 1 , wherein a ring-shaped linear joint is provided inside.
The cross section of the shape with folds extending radially from the joint
A ring-shaped nonwoven fabric characterized by having: 2. A cross-sectional shape having radial folds is longitudinal.
2. The refill according to claim 1, wherein
Non-woven fabric . 3. A non-woven fabric comprising one or a plurality of laminated non-woven fabrics,
A method for producing a ring-shaped nonwoven fabric, comprising: forming a ring-shaped linear joint, and cutting the ring-shaped linear joint between an inner side and an outer side.