JP2001172848A - Biodegradable and simple circular knit bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple circular knit bag not having a sewn part at all, being inexpensive and durable, and having biodegradability. SOLUTION: The following means are employed: the bottom part 2 of the circular knit bag is previously knitted in the edge part of a bag body part 1; a fusing thread with the lower melting point than a thread composing the body part 1 is fused by heating in order to perform the fusing between the composing threads to form the bag; and the threads composing the body part 1 and the fusing thread comprise a biodegradable polymer. Thus, the bag is easily biodegraded by microorganisms, and wet refuse such as garbage can be buried in the ground or thrown into a composting apparatus together with the bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biodegradable simple circular knit bag, and more particularly, to an inexpensive and durable simple circular knit bag having no sewn portions.

[0002]

2. Description of the Related Art Recently, a simple knitted bag made of a knitted fabric is frequently used as a draining garbage bag for a sink in a cooking place, a kitchen or the like. This simple knitted bag is much more excellent in drainage than a conventional garbage bag made of a synthetic resin film having a large number of open pores. Since it can be easily mounted on a triangular corner (so-called triangular corner) and can be made from recycled fibers, it is convenient for effective use of resources.

[0003] However, the conventional knitted fabric bag must be subjected to a complicated sewing process for joining the bottom or side of the bag at the time of bag making, and this sewing work increases the manufacturing cost of the knitted fabric bag. Had become.

Further, conventional knitted fabric bags are made of polyolefin resin fibers such as polyethylene, so that when they are incinerated after use, they generate a large amount of carbon dioxide gas and incinerators produced by high-temperature combustion. Inevitably, the problem of damage to the garbage is unavoidable, and even when landfilled in soil, it remains semi-permanently without being decomposed by microorganisms, etc. Was.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned disadvantages of the conventional knitted fabric bag, and has no sewn portion and has low cost and strong biodegradability. An object of the present invention is to provide a simple circular knitted bag.

[0006]

SUMMARY OF THE INVENTION In order to solve the above technical problems, the present invention relates to a bag body 1 made of a cylindrical circular knitted fabric and a fabric at the end of the bag body 1. A circular knitted bag comprising a joined bag bottom portion 2, wherein the bag bottom portion 2 has a melting point lower than that of the yarn constituting the bag body portion 1, which is knitted in advance at an end of the bag body portion 1. It is formed by welding and joining the ends of the bag body 1 by heat-welding the yarns, and the constituent yarns and welded yarns of the bag body 1 contain a biodegradable polymer. Means were adopted.

[0007] Here, the biodegradable polymer is a biodegradable polymer that is relatively easily decomposed by microorganisms and living enzymes that survive in the soil of the natural world, freshwater and seawater, and its decomposition products are harmless to ecosystems. It refers to a molecular material and is not particularly limited as long as it has water resistance enough to be used as a constituent material of a draining garbage bag, for example, polyethylene succinate, aliphatic polyester such as polyethylene adipate, Polylactic acid, polyester of oxycarboxylic acid such as polycaprolactone or lactone, poly-3-hydroxyvalerate, poly-3 produced by microorganisms in nature
-Hydroxybutyrate, microbial polyesters such as poly-3-hydroxycaprolate and the like,
These can be used alone or in combination of two or more.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. FIG. 1 is an overall perspective view of a simple biodegradable circular knitted bag according to the present invention, and FIGS.
Is a manufacturing process diagram showing a method for manufacturing a biodegradable simple circular knitted bag, and FIGS. 5 and 6 are manufacturing process diagrams showing another method for manufacturing a biodegradable simple circular knitted bag.

[0009] The simple biodegradable circular knitted bag H of this embodiment shown in Fig. 1 is embodied as a draining garbage bag that can be attached to a drain port of a sink or a basket (commonly called a triangular corner).

In FIG. 1, what is designated by reference numeral 1 is a bag body of a simple biodegradable circular knitted bag H of the present embodiment, and the bag body 1 is made of a thread made of a biodegradable polymer. It is composed of a circular knitted circular circular knitted fabric. In the present embodiment, a polyethylene succinate yarn having biodegradability ("Bionore (registered trademark) # 1000" manufactured by Showa Kogyo Co., Ltd., melting point 11)
(4 ° C) in a tubular knitted fabric with a flat knitting structure. The bag mouth portion 10 of the bag body 1 has a pre-twisted biodegradable polylactic acid fiber (Kanebo synthetic fiber). (Lactron Co., Ltd.) is circular knitted and can be scaled freely.

In FIG. 1, what is indicated by reference numeral 2 is a bag bottom of a simple biodegradable circular knitted bag H of the present embodiment, and the bag bottom 2 has a biodegradable and low melting point welding yarn. Is heated and melted, and the fabrics at the ends of the bag body 1 are welded and fixed. That is, a welded yarn M having a lower biodegradability than the polyethylene succinate yarn and having a lower melting point than the polyethylene succinate yarn is applied to the end of the bag body 1 made of the polyethylene succinate yarn in advance. Simultaneously woven (see FIG. 2), only the welding yarn M is heated and melted to weld and fix the fabrics (polyethylene succinate yarns) at the ends of the bag body 1 to fix the bag bottom 2
Is configured. In this embodiment, a polyethylene succinate adipate yarn ("Bionore (registered trademark) # 3000" manufactured by Showa Kogyo Co., Ltd., melting point: 95 [deg.] C.) having biodegradability is used as the welding yarn M.

As described above, in the simple biodegradable circular knitting bag H of the present embodiment, the cloth bottom of the circular knitted fabric F is welded and fixed with the welding yarn to form the bag bottom portion 2. Unlike the knitted garbage bag described above, the bag can be easily manufactured without any troublesome sewing processing, and an extremely inexpensive draining garbage bag can be provided.

The simple biodegradable circular knitted bag H of the present embodiment does not melt the constituent yarn itself constituting the bag body 1, but heats and melts only the welded yarn M having a low melting point. Since the bag bottom portion 2 is formed by this, it is possible to avoid quality deterioration such as a decrease in strength due to heat history of the constituent yarns constituting the bag body portion 1, and furthermore, the configuration of the bag body portion 1 Since the welded yarn M surrounding and solidifying the yarn securely fixes the end of the bag body 1, it is possible to provide an extremely durable garbage bag.

In the simple biodegradable circular knitted bag H of this embodiment, the constituent yarns forming the bag body 1 and the welding yarns M forming the bag bottom 2 are made of a biodegradable polymer. Therefore, even if garbage such as kitchen garbage is buried in the soil with a bag or put in a composting device, it is completely decomposed in the soil or the composting device, It does not hinder the composting of garbage inside. In addition, since the bag body 1 of the simple biodegradable circular knitted bag H has a knitted structure and excellent moisture permeability, it can promote decomposition by microorganisms and the like, and can be used for a relatively short time. It can be decomposed and composted in between.

In this embodiment, the bag bottom 2 is
The fabric at the end of the bag body 1 is welded and joined with the welding yarn M so that the fabrics are simply overlapped with each other with almost no fold, but the present invention is not limited to this. As shown in FIG. 6, in a state where the fabric at the end of the bag body 1 is locally converged, the bag bottom 2 is welded and joined with a welding yarn.
May be formed. In this way, if the fabric at the end of the bag body 1 is converged and fixed by welding, the bag bottom 2 becomes more robust.

[0016] The biodegradable simple circular knitting bag H of the present embodiment comprises:
It is manufactured by the following manufacturing method. This will be described with reference to FIGS.

First, as shown in FIG. 2, using a well-known circular knitting machine, a yarn having elastic ear tissues S.S at both ends and constituting another part at an intermediate part in the longitudinal direction. Circular circular knitted fabric F in which the welding yarn M having a lower melting point is woven
To organize. The constituent yarns and welded yarns M of the circular knitted fabric F contain a biodegradable polymer.

Then, as shown in FIG. 3, the intermediate portion of the circular knitted fabric F is heated to melt only the low melting point welded yarn M, and the welded yarn M forms the circular knitted fabric F. By cooling and solidifying the welded yarn M in the surrounding state, the fabrics at the intermediate portion of the circular knitted fabric F are welded and joined.

Thereafter, as indicated by reference numeral C in FIG. 3, the welded joint portion by the welded yarn M is cut to divide the circular knitted fabric F into two parts, as shown in FIG. A simple circular knitting bag H comprising a bag body 1 made of a circular knitted fabric and a bag bottom 2 obtained by welding and joining the ends of the bag body 1 with welding yarn is manufactured.

As described above, in the method for manufacturing the simple biodegradable circular knitted bag H of the present embodiment, the circular knitted fabrics F are welded to each other with the welding yarn M and then cut. Is simple, and two simple biodegradable circular knitted bags H can be simultaneously manufactured from the circular knitted fabric F having the ear tissue S at both ends, so that the biodegradable simple circular knitted bags can be efficiently mass-produced. Therefore, productivity can be improved and a simple biodegradable circular knitted bag can be provided at low cost.

In the manufacturing method of the above-described embodiment, the welded yarn M is formed by simply overlapping the fabrics at the intermediate portion of the circular knitted fabric F without forming many folds.
However, the present invention is not limited to this, and the intermediate portion of the circular knitted fabric F may be locally converged as shown in FIG. . As a result, as shown in FIG. 6, it is possible to mass-produce a durable biodegradable simple circular knitted bag H having a bag bottom 2 to which the fabric at the end of the bag body 1 is converged and fixed by welding. Become.

[0022]

As described above in the embodiment, in the simple biodegradable circular knitted bag according to the present invention, the circular knitted fabric is welded and fixed to each other with the welding yarn to form the bag bottom. Therefore, the bag can be easily made without any troublesome sewing processing as in the conventional knitted fabric garbage bag, and an extremely inexpensive draining garbage bag can be provided.

Further, the simple biodegradable circular knitted bag of the present invention comprises:
Because the bottom of the bag is formed by heating and melting the low-melting welded yarn instead of melting the yarn itself that constitutes the bag body, it depends on the thermal history of the yarn that constitutes the bag body. It is possible to avoid quality deterioration such as a decrease in strength and the like, and since the welded yarn solidifying around the constituent yarns of the bag body securely fixes the end of the bag body, an extremely strong draining garbage bag Can be provided.

Further, the biodegradable simple circular knitted bag of the present invention comprises:
Since the constituent yarns forming the bag body and the welding yarns forming the bag bottom contain biodegradable polymers, they can be easily decomposed by microorganisms and the like, and garbage such as kitchen garbage can be removed from the bag. Even if the whole is buried in the soil or put in a composting device, it is completely decomposed in the soil and in the composting device and does not hinder the composting of garbage in the bag. In addition, since the bag body of this simple biodegradable circular knitted bag has a knitted structure and has excellent moisture permeability, it can promote decomposition by microorganisms and the like, and can be decomposed in a relatively short time. Can be composted.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a simple biodegradable circular knitted bag according to the present invention.

FIG. 2 is a manufacturing process diagram showing a method for manufacturing a biodegradable simple circular knitted bag.

FIG. 3 is a manufacturing process diagram showing a method for manufacturing a biodegradable simple circular knitted bag.

FIG. 4 is a production process diagram showing a method for producing a biodegradable simple circular knitted bag.

FIG. 5 is a manufacturing process diagram showing another method for manufacturing a biodegradable simple circular knitted bag.

FIG. 6 is a manufacturing process diagram showing another method for manufacturing a biodegradable simple circular knitted bag.

[Explanation of symbols]

 1 Bag body 2 Bag bottom F Circular knitted fabric M Welding yarn

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65F 1/00 102 B65F 1/00 102D D04B 1/22 D04B 1/22 F-term (Reference) 3E023 FA03 FA10 3E064 AD03 BA21 BB01 BC18 BC20 EA22 FA01 GA06 HM01 3E086 AA23 AB03 AD01 BA04 BA42 BB44 BB51 BB71 BB90 CA40 4L002 AA07 AC00 AC05 BA01 DA00 DA01 EA00 EA02 FA00 FA10

Claims (3)

[Claims] 1. A circular knitted bag comprising: a bag body 1 made of a cylindrical circular knitted fabric; and a bag bottom 2 in which the fabrics at the ends of the bag body 1 are joined to each other. Is a welded yarn M having a lower melting point than the yarn forming the bag body 1, which is knitted in advance at the end of the bag body 1.
Are formed by welding and joining the ends of the bag body 1 by heat-welding, and the constituent yarns and the welding yarn M of the bag body 1 contain a biodegradable polymer. Biodegradable simple circular knit bag. 2. The simple biodegradable circular knit bag according to claim 1, wherein the constituent yarns and the welding yarns M of the bag body 1 are biodegradable aliphatic polyester yarns. 3. The bag bottom portion 2 is formed by welding and joining with a welding yarn M in a state where the fabric at the end of the bag body 1 is locally converged. The described simple biodegradable circular knitted bag.