JP2002038318A - Bag article, method for producing the same, and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag article good in quality by adopting an ultrasonic welding method and making an overlap width (joining layer) wide when producing the bag article by using a nonwoven fabric made of a synthetic resin, and further to provide a method and apparatus for efficiently producing the bag article. SOLUTION: The apparatus 1 for producing the bag article is constituted of a pair of raw fabric rolls 2a and 2b for sending out the nonwoven fabrics S1 and S2, lapping rolls 5a and 5b for forming laminated nonwoven fabric S by laminating the sent-out nonwoven fabrics S1 and S2, an emboss roll 7 for forming the welded parts in desired shapes in the laminated nonwoven fabric S, and an ultrasonic oscillator 6 arranged at the vicinity of the embossing roll 7 and for carrying out the ultrasonic welding of the laminated nonwoven fabric s. The laminated nonwoven fabric (S) obtained by laminating the two raw fabrics S1 and S2 is drawn to the emboss roll 7 having the desired pattern formed thereon, and the ultrasonic oscillation is imparted the laminated nonwoven fabric on the emboss roll 7 to form the wide welded part along the formed pattern to provide the bag article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven bag, such as various gloves, tabi, limb supporters, hair covers, etc., a method of manufacturing the same, and a device therefor. The present invention relates to a disposable bag used in factories and medical institutions, a method for manufacturing the same, and a device therefor.

[0002]

2. Description of the Related Art For example, from the viewpoint of prevention of pathogen infection and prevention of food poisoning, in medical institutions and cooking food factories where strict hygiene management is required, all employees engaged in the work are obliged to wear gloves. The gloves are basically disposed of.

Gloves used in such applications are made of synthetic resins such as polyethylene and polyvinyl chloride, and are widely used in various industrial fields as well as at home, in addition to the fields described above. Above all, non-woven gloves
Attention has been paid to medical disposable applications from the viewpoints of convenience and simplicity of use, cost efficiency, shielding effect against pathogenic bacteria, wearing comfort, and productivity.

[0004]

SUMMARY OF THE INVENTION Including disposable products,
Strict restrictions have recently been imposed on synthetic resin-based products in terms of health and environmental health.

[0005] On the other hand, these disposable bags do not give any physical or physical damage such as stuffiness or rash to the user due to properties such as air permeability and additives used during production. However, there is a strong demand not to release endocrine disrupting chemicals (environmental hormones) such as dioxin to the environment by using additives or upon disposal.

[0006] In particular, bags made of synthetic rubber may cause health and hygiene problems due to additives used during production and their non-breathability.
In addition, the problem of generating endocrine disrupting chemicals such as dioxin has become apparent.

On the other hand, polyolefins such as polyethylene and polypropylene can substantially cope with the above-mentioned problems, but in addition to the problem of non-breathability, a simple method of preparing bag-like materials having good properties such as gloves. There is also a problem that there is no.

[0008] In particular, non-woven products, especially non-woven products made of polyolefins such as polyethylene and polypropylene, are expected to solve the above-mentioned problems. There is no proper method to perform, and the joint strength is unsatisfactory with general heat sealing or sewing, the joints are hardened, or the joints are not uniformly joined, and the parts that are not joined or easily peeled off In the case where a recently developed polyolefin having elasticity is used as a material, the solution of this problem has been greatly highlighted.

In view of the above-mentioned circumstances, the present invention employs ultrasonic welding means when manufacturing a bag-like material using a nonwoven fabric made of polyolefin such as polyethylene or polypropylene, and employs a bonding layer, so-called glue. An object of the present invention is to provide a high-quality bag-like product by providing a wide margin, a manufacturing method for efficiently manufacturing the bag-like product, and an apparatus therefor.

[0010]

According to a first aspect of the present invention, there is provided a non-woven fabric made of a synthetic resin, wherein a wide welded portion is formed by ultrasonic welding. It is a bag-like material characterized by having.

According to a second aspect of the present invention, a laminated nonwoven fabric obtained by joining two nonwoven fabrics is drawn out to an embossing roll having a required pattern, and ultrasonic vibration is applied to the embossing roll. And forming a wide welded portion along the formed pattern to form a bag-like material.

[0012] Further, the invention according to claim 5 is a wrap for forming a laminated nonwoven fabric by joining a pair of web rolls for feeding a web of nonwoven fabric and the nonwoven fabric sent from each web roll. Roll, an embossing roll for forming a welded portion of a desired shape on the laminated nonwoven fabric, and an ultrasonic oscillator for ultrasonically welding the laminated nonwoven fabric, which is disposed close to the embossing roll. This is an apparatus for manufacturing a bag-like material.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a bag-like material
Gloves, socks, hair covers, and the like manufactured using a synthetic resin nonwoven fabric as a material are not particularly limited as long as the form is a bag.

Examples of the synthetic resin which is the material of the nonwoven fabric forming the bag-like material include olefins such as polyethylene and polypropylene, polyethylene terephthalate, polyurethane and polyamide. To do so, olefinic resins such as polyethylene and polypropylene,
Stretchable resins such as (meth) acrylic acid copolymers are preferable, and by using a nonwoven fabric made of such a resin, not only the above problem can be easily solved, but also gloves and the like having excellent wearing feeling can be obtained. It is easily prepared.

As a method for producing a nonwoven fabric made of a synthetic resin, there are various methods relating to web formation and web bonding. In the present invention, any of these methods may be used. No limitation is required, and for example, those having about 10 to 150 g / m ² are preferably used.

There are various methods for manufacturing a bag using a synthetic resin non-woven fabric as a material. Generally, if the product to be obtained is a glove, two sheets of the material are superimposed on each other. There is a method in which a heat-sealed glove having a so-called seam (joining layer) is obtained by heat-sealing the heat-sealed portion to form a so-called seam (joining layer).

However, in the present invention, the above-mentioned problems can be solved only by bonding the two material sheets by ultrasonic welding and setting the joining layer to be as wide as 2 to 5 mm. Thus, gloves and the like with excellent wearing feeling can be provided.

Hereinafter, an apparatus for manufacturing a bag-like article according to the present invention will be described in detail with reference to the accompanying drawings, and a method for continuously manufacturing a bag-like article using this apparatus will be described.

FIG. 1 is an explanatory view schematically showing an apparatus 1 for manufacturing a bag-like material according to the present invention, wherein a nonwoven fabric S ₁ made of synthetic resin is used.
Bulk roll 2a which was wound S _2, 2b and the winding one nonwoven taken, in Figure 1, a nonwoven fabric 2b
And a pair of wrap rolls 5 for joining and integrating the _two nonwoven fabrics S ₁ and S ₂ with a tension adjusting mechanism including a dancer arm 3 and a tension adjuster 4 arranged in the middle of winding.
a, 5b, an embossing roll 7 for welding a required pattern to the joined sheet S, and an embossing roll 7 provided vertically close to the circumferential direction of the embossing roll 7;
The width of the ultrasonic booster 6 is approximately the same as the width of the ultrasonic booster 6, the die-cut roll 8 for die-cutting, the alignment conveyor belt 10 for conveying the die-cut product, and the die-cut joining sheet S. Trim tension roll 9 for winding
It is composed of

A method of manufacturing disposable gloves using the manufacturing apparatus 1 having the above-described configuration will be described. First, the material rolls 2a and 2b are made of the same synthetic material having the required width, length and thickness. The nonwoven fabrics S ₁ and S ₂ made of resin are wound up and set.

At this time, one nonwoven fabric S ₁ is pulled out to a pair of wrap rolls 5 a and 5 b via a tension roll 3 a, and the other nonwoven fabric S ₂ is passed through a tension adjusting mechanism comprising a dancer arm 3 and a tension adjuster 4. It is set so as to be pulled out to the pair of wrap rolls 5a and 5b.

When the production apparatus 1 is operated in this state, the non-woven fabrics S ₁ and S wound around the material rolls 2a and 2b are formed.
₂ is sent out to a pair of wrap rolls 5a and 5b at the same speed while the winding speed is adjusted by a tension adjusting mechanism, and the wrap rolls 5a and 5b are joined and integrated to form a laminated nonwoven fabric S.

The laminated non-woven fabric S thus integrally joined.
Is wound by the embossing roll 7, and is engraved on the embossing roll 7 by passing between a horn (not shown) of the ultrasonic booster 6 arranged near the embossing roll 7 and the embossing roll 7. Only the part that contacts the hand-shaped pattern is heated and melted, and the glove is molded.

The laminated nonwoven fabric S in which gloves of a predetermined shape are formed at required portions by the embossing rolls 7 is then sent to a die cutter roll 8 and the outer periphery of a portion (welded portion) welded in a glove shape. Are cut out, and the molded gloves are individually separated from the laminated nonwoven fabric S, and the aligned conveyor 10 is separated.
It falls down and is continuously removed as a product.

On the other hand, the laminated nonwoven fabric S from which the gloves are separated is
It is picked up by the trim pulling roll 9 and removed from the manufacturing apparatus 1.

In the above manufacturing process, the raw roll 2
a, 2b non-woven fabric S ₁ , S
_{2, It} is preferable to use the same material, except for the case where it is necessary to make a difference in the material on the front and back of the bag to be obtained for exceptional reasons, because ultrasonic welding is easy, When different types and materials must be used, it is necessary to sufficiently consider the conditions for ultrasonic welding.

Further, the preparation of the tension is an important step as a pre-process for forming a laminated nonwoven fabric by joining and integrating.
The two nonwoven fabrics whose tension is not adjusted not only make the lamination itself difficult, but also the products obtained by joining are often distorted or shrunk, resulting in defective products, which makes production difficult. Is not preferred.

The pattern engraved on the surface of the embossing roll 7 is for joining the laminated non-woven fabric S to prepare a desired bag-like material, and a welding portion to be provided for heating and melting by ultrasonic waves. For example, if it is a glove, it is formed in the shape of a hand in the shape of a hand, and one or more pieces are formed on the surface of the embossing roll 7 according to the size of the bag-like material.

The width of the welded portion is determined by the strength of the product bag,
It has a great effect on the adhesive strength between the welded nonwoven fabrics and the wearing feeling of the bag-like material, and the width is preferably about 2 to 5 mm. The type of the nonwoven fabric to be used, the raw material, the manufacturing method, etc. The specific width is determined in consideration of the size, use, and the like.

Embossing roll 7 with convex pattern
In order to smooth the feeding of the laminated nonwoven fabric S and to ensure the formation of the welded portion, the portions other than the convex pattern,
It is desirable to embed a non-heat transfer material such as silicon rubber.

An ultrasonic oscillator used for ultrasonic welding or a special ultrasonic welding machine is not required.
Any frequency that can oscillate ultrasonic waves at a frequency of from 500 Hz to 500 KHz may be used. The gap between the horn of the ultrasonic oscillator or the ultrasonic welding machine and the embossing roll 7 is appropriately set according to the required adhesive strength, the type and material of the nonwoven fabric. It is usually about 3/100 to 11/100 mm.

The surfaces of the horn and the embossing roll 7 do not necessarily have to be parallel to each other, and the horn is slightly inclined to change the gap between the horn and the embossing roll 7 on the right and left sides of the embossing roll 7 to reduce the adhesive strength. It can be changed left and right.

The position of the horn is fixed, and the ultrasonic wave is oscillated from the fixed horn toward the surface of the embossing roll 7 under a predetermined condition and passes through the laminated nonwoven fabric S passing on the surface of the embossing roll 7. The vibration is transmitted, and only the laminated nonwoven fabric S positioned on the pattern formed in the convex shape is heated by the vibration and welded.

The laminated non-woven fabric S having a welded portion according to the pattern engraved on the embossing roll 7 is sent to a die cutter roll 8 and is cut into a bag-like material along the outer periphery of the welded portion. However, it is also possible to perform the welding and the die cutting at the same time.

In order for the die cutter roll 8 to accurately die-cut the bag-like material molded along the outer periphery of the welded portion, it is desirable to rotate the embossing roll 7 and the die cutter roll 8 synchronously. Although it depends on the size of the material itself, the material of the raw material, the capacity of the ultrasonic oscillator, etc., it is possible to continuously produce 30 to 130 bag-like materials in one minute.

In the above embodiment, two sheets are used, but a desired bag can be obtained even if one sheet is used.

That is, a synthetic resin non-woven fabric having the required width, thickness and length wound on a raw roll is drawn out, folded into two along a central portion thereof by a roll (not shown), and the fold is cut off. To form a laminated nonwoven fabric S by forming two nonwoven fabrics, superposing the back surfaces together by means such as inverting the obtained two nonwoven fabrics, and joining and integrating the wrap rolls 5a and 5b. In this case, the subsequent operation is the same as in the above embodiment.

When one sheet is folded into two and used as two sheets, it is necessary that the tension of the two sheets is the same, so that one sheet is cut and two sheets are cut. If a difference in tension occurs between the two webs in a process after the formation of the web, it is desirable to adjust the tension for the same reason as described above.

[0039]

According to the method and the apparatus for manufacturing a bag-like material of the present invention, the bonding (welding) of the nonwoven fabric of the material is performed by using an ultrasonic wave and widening the welded portion on an embossing roll having a spherical surface. Therefore, the welding state is stabilized, there is no variation in adhesive strength, there is no unbonded part, that is, pinholes, etc., a stable product can be supplied, and the resulting bag-like material has a three-dimensional appearance, wear The feeling is good.

[0040]

The present invention will be described more specifically below with reference to examples. Ethylene-methacrylic acid copolymer (Nucrel N110) manufactured by Mitsui / Dupont Polychemical Co., Ltd.
H) as a raw material to obtain a nonwoven fabric having a basis weight of 40 g / m ² , and using this nonwoven fabric as a material, a wrist width of 12 cm, a distance from the wrist to the tip of the middle finger of 30 cm, a finger width of 4 cm, and a finger length of 6 to 9 cm;
Gloves having a welding portion (glue margin) having a width of 4 mm were continuously manufactured using the manufacturing apparatus 1 shown in FIG. The ultrasonic oscillator used was 920BCA manufactured by Emerson Japan
When welding was performed under the conditions of an output of 2 KW and a frequency of 20 KHz, gloves could be manufactured at a speed of 30 sheets per minute.

[0041]

The bag-like material made of nonwoven fabric according to the present invention is suitable for disposable use, yet has a rich three-dimensional effect and good wearing feeling. In particular, if polyolefin is selected as the material, the bag for disposable use can be used. Although it is a state-of-the-art product, it is an environmentally friendly product, and is an excellent product that can be widely used in medical, food, cosmetics, high-tech products, nursing care, horticulture, pets, etc.

The method and the apparatus for manufacturing a bag-like material according to the present invention use a non-woven fabric as a material, guide the material to an embossing roll engraved with a desired pattern, and apply ultrasonic vibration on the embossing roll. Since the required portions of the two nonwoven fabrics can be heated and welded, an excellent effect that a desired bag-like material can be manufactured with high efficiency and high productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing an example of an apparatus for manufacturing a bag-like material according to the present invention.

FIG. 2 is a partially cutaway plan view of a glove which is an example of the bag-like material of the present invention.

[Explanation of symbols]

Manufacturing apparatus 2a of a bag-like material, 2b bulk roll 3 dancer arm 4 tension adjuster 5a, the roll 10 aligned conveyor S ₁ Tensile 5b lap roll 6 ultrasonic booster 7 embossing roll 8 die cutter roller 9 trim, S ₂ nonwoven S Laminated non-woven fabric

Claims (7)

[Claims] 1. A bag made of a synthetic resin nonwoven fabric and having a wide welded portion formed by ultrasonic welding. 2. A laminated nonwoven fabric obtained by joining two nonwoven fabrics,
By drawing out the embossing roll on which the required pattern is formed and applying ultrasonic vibration on the embossing roll, a wide welded portion is formed along the formed pattern to form a bag. A method for producing bags. 3. A laminated non-woven fabric is formed by adjusting the tension of at least one of the long webs unwound from two raw rolls, and then laminating the laminated non-woven fabric to form a required pattern. A method for producing a bag-like material which is drawn out to an embossing roll and subjected to ultrasonic vibration on the embossing roll to form a wide welded portion along the formed pattern to form a bag-like material. 4. A single nonwoven fabric is divided into two nonwoven fabrics by appropriate means to form two nonwoven fabrics, and one of the nonwoven fabrics is inverted and laminated on another nonwoven fabric to form a laminated nonwoven fabric. Pulling out the embossing roll on which the required pattern is formed and applying ultrasonic vibration on the embossing roll to form a wide welded portion along the formed pattern to produce a bag-like material Law. 5. A pair of web rolls for sending out a web of non-woven fabric, a wrap roll for joining the non-woven fabrics sent from each web roll to form a laminated non-woven fabric, An embossing roll for forming a welded portion, and disposed in close proximity to the embossing roll,
An apparatus for manufacturing a bag-like material, comprising an ultrasonic oscillator for ultrasonically welding a laminated nonwoven fabric. 6. The bag according to claim 5, further comprising a tension adjusting mechanism for adjusting the tension of one of the nonwoven fabrics drawn from each of the web rolls when forming the laminated nonwoven fabric. Equipment for manufacturing objects. 7. A dividing mechanism for folding a web fed from a web roll into two and then dividing the web into two, a wrap roll for joining the two split webs to form a laminated nonwoven fabric, A bag comprising: an embossing roll for forming a welded portion having a desired shape on a nonwoven fabric; and an ultrasonic oscillator disposed in close proximity to the embossing roll and for ultrasonically welding the laminated nonwoven fabric. Equipment for manufacturing objects.