JPS608044A - Fitting method of doubly lapped synthetic resin handle to synthetic resin bag and synthetic resin bag - Google Patents

Abstract

PURPOSE:To obtain a strong and inexpensive synthetic resin handbag by a method in which a U-shaped thick doubly lapped synthetic resin handle is hot-bonded to the inside of the mouth of a bag in an intermittently lacked ring line teeth form in paired upper and lower teeth-shaped hot press molds. CONSTITUTION:Doubly lapped synthetic resin handles 7 and 7' are hot-bonded 8 and 8' by hot pressing to the inside of the mouth of a synthetic resin bag P in a ring line form in paired upper and lower teeth-shaped hot press molds. The handles 7 and 7' can thus be attached to the bag P in a short time without applying non-bonding treatment to the contact faces of the handles 7 and 7' because the width of the hot-bonded portions 8 and 8' can be made smaller with intermittently formed spaces 9 and 9' and also because thick filmy handle materials can be used.

Description

Detailed Description of the Invention: In a synthetic resin carrier bag with a two-ply synthetic resin handle attached, the two-ply synthetic resin handle is attached to the bag opening of the resin bag material during the manufacturing process of the bag. heat fused,
At the same time, a method for manufacturing the above-mentioned handbag bag by heat-sealing and cutting the periphery of the bag material is disclosed in Patent No. 10.
There is a prior art of No. 11067 (Japanese Patent Publication No. 54-25468).

However, in this patented invention, a U-shaped two-ply synthetic resin handle produced by folding and bending is mechanically applied to the bag opening of a long synthetic resin bag material being transported. transported to
At the same time as manufacturing bags by heat-sealing the bag material, we heat-seal a double-layered handle to the bag opening without fusing the two handles to each other (3). As a means to do this, it is possible to apply a pneumatic pretreatment such as printing or other means to form a non-fusion layer that prevents mutual fusion on all mutually contacting surfaces of the fused portions at both ends of the handle. However, the forming blade of the non-fused layer is a method of simultaneously heat-sealing the two-layered handle to the bag opening to fuse it to the side of the bag material without fusing them to each other.

Therefore, it is essential for U-shaped two-ply synthetic resin pedestals manufactured directly by automatic pedestal making equipment to be pretreated with a non-bonding layer (roe) beforehand. Processed karoe has the disadvantage that the number of steps increases and is troublesome, and that it requires a non-fusible layer material, which increases the cost of the pattern.

In addition to the above-mentioned patented device, the sashimi is manufactured using various other appropriate manufacturing devices. As a method for heat-sealing so as not to fuse, it is necessary to use the non-fusion pretreatment method 2 as described above, and the heat-sealing is performed using a mere thousand-sided hot press mold. As a result of the flat welding of the negative side, a long welding time is required, and high-temperature pressing is required to achieve short-time welding. High-heat press hardens the fused surface very much, weakening the border strength, and if tears or peeling occur at the border due to the weight of the bag containing the contents, it will easily propagate and the handle will easily come off. There is great concern about the strength of this.

The method of the present invention involves thermally fusing two-ply synthetic resin handles,
The purpose is to provide a durable and inexpensive synthetic resin carrying bag with a two-ply handle by using a heat-sealing method that has high weight-bearing strength by reliably eliminating the drawbacks of conventional planar welding, which poses concerns about its strength. It is something to do.

The attachment method of the present invention involves folding and transporting a thick U-shaped two-ply synthetic resin handle using an appropriate automatic handle manufacturing and conveying device, and applying (5) non-fusion treatment to the mutually contacting surfaces. The inner surface of the bag opening of each bag body is manufactured by heat-sealing and cutting a long synthetic resin bag material for transportation. This method is characterized by hot-pressing with a pair of upper and lower tooth-shaped heat press molds formed in a meshing arrangement, and then heat-sealing and attaching it to the intermittent tooth mold of the ring line, an example of which is shown in the drawings. To explain,
It is as follows.

First example.

, as shown in Figures 1 to 3, a hot mold is used to heat-seal the two-ply synthetic resin handle η) to the inner surface of the synthetic resin bag material (2) at the required intervals. , the incisors (4) (4) and convex teeth <5) (5) of the required size are alternately arranged in the column line, and the upper and lower tooth shapes are in mutually opposed meshing during heat transfer. Long synthetic resin bag material (2
) on the inside of the bag opening (6), the contact surfaces of which are folded and transported in a two-layered manner using an appropriate automatic pattern manufacturing and transporting device are non-fused and made into a U-shaped thick two-ply synthetic resin that does not rot. Both ends of the handles (7) (7) are brought into contact with each other, and heat press is applied simultaneously to the cut manufacturing process associated with heat sealing around the bag material (2). The completed synthetic resin bag body P
At the same time, heat fusion of the intermittent tooth type in the column line with the upper and lower opposing tooth type is applied to the front and back side shank welded parts t81 (81
This method is characterized by attaching the handle (7J (7")) to the base of the handle.

Second example.

As shown in FIGS. 4 and 5, the tooth shapes of the mold in the first embodiment are made so that the upper and lower parts are not opposed to each other and are interlocked, so that a pair of upper and lower tooth-shaped hot press molds (3) ( 3), and using the core mold (3) (3), as in the first embodiment, the intermittent lines in the column line are formed on the front and back side handle fused parts of the completed synthetic resin bag P. This method is characterized by attaching two layers of resin pedestal (7) (7) to the tooth-shaped heat fusion +8) t8).

In addition, 1. In both the second embodiment, the convex teeth (5) (5) of the mold (6) (6> and (3) t3) may be pointed teeth or claw-shaped teeth instead of flat teeth.

In addition, since it is advantageous for the heat to propagate as slowly as possible, a slightly thicker resin film is used for the thickness of the handle (7J (7)), which varies depending on conditions such as pressing force and fusion temperature. Although not limited, a thickness of about 100/''-300p is suitable.

Furthermore, the attachment of the handles (7) (7) to the bag opening is primarily intended for attachment on the inside, but can also be attached on the outside if fusion is performed using the intermittent tooth type method of the present invention.

As a dependent invention of the above method, the thick U-shaped handle (7) (7) is heat-sealed in an intermittent tooth shape to the ring line in the tank etc. to the bag opening by the above method. (8) This is a synthetic resin carrying bag attached in the form i8).

This is an intermittent space.

Since the method of the present invention is as described in the above embodiment, the thick handle (2) is
7) For the fusion installation in (7), the heat press mold for the heat fusion is used to make the concave and convex tooth shapes (41(4), (505) vertically opposed or non-opposed) on the ring line in the tank etc. By hot pressing using a pair of upper and lower molds formed in an alternating meshing arrangement, the fusion becomes intermittent tooth type heat fusion (81 (8)) using a tooth press.

This tooth-shaped thermal welding i1'l) (8) differs from conventional full-plane welding in that the welded part is finer and has intermittent voids (91) (the presence of 91 and the thicker material of the handle material). Correlating with the conditions with the film, it is possible to fuse the paper at a low temperature, and therefore, the heat propagation is slowed down. Even if it is a completely ordinary thermoplastic resin material (9) that is not processed, even if it is heat-pressed from the front and back sides simultaneously, the shims (7) (7) will not adhere to each other at all and will not melt. It will be attached to the bag body P.

The heat fusion part is a fine intermittent tooth type heat fusion (8) (8) related to the ring line, so it can be fused instantly even with a low heat press, and it will not harden unnecessarily. , the fused part is very strong and difficult to break, and due to the presence of the intermittent cavity part (91(9)), in the unlikely event that the heat fused part ()l) (
Even if damage occurs at the boundary of (8), the propagation will not stop at the adjacent welded part. , it is highly durable, and the C7J (7) does not require any non-fusion processing, making it very economical as it is just an ordinary C7J (7) strikedown. It is very convenient.

Please note that the handles (7) and (7) should be of appropriate thickness (
10) Heat propagation is slowed down by using

It should be noted that the mounting method of the second embodiment is better than the heat fusion (8.
) +8) part is not compressed by the upper and lower teeth, and each incisor (4)
) (Since it is carried out between 41 and 41, it is effective because the heat propagation (relative to the opposite side) is slow and low.

In addition, in the method of the present invention, compared to conventional flat molds, the bag surface of the tooth-shaped mold is embedded in the part where the handle is attached.
These parts are strong, and the simultaneous heat fusion of four places on the front and back sides of each left and right end allows for greater misalignment due to thermal expansion of the bag surface because the adhesive surface is thicker with a flat mold. In the case of fusion bonding for intermittent tooth molds, since the press area to be contacted is small, the thermal expansion is correspondingly small and uniform pressure bonding is achieved, so no bonding defects occur at all.Furthermore, with flat molds, there is no hardening due to heat. As a result of this change, the bonded area becomes thinner, weaker, and has defects that can easily come off, but intermittent-tooth type bonding has a notable difference in that this does not occur and the bonded surface does not become thinner, making it more durable (11).

Therefore, by the method of the present invention, a two-ply synthetic resin handle (7) (7J
The attached synthetic resin carrying bag has a strong handle attachment part, and is durable, heavy-bearing, and durable.Furthermore, the fine ring line and ridge-tooth fusion shape make it fashionable. It is beautiful and has a very attractive appearance, so it is in high demand.

[Brief explanation of the drawing]

The drawings show examples of the present invention. Figure 1 is a bottom view of the upper tooth-shaped hot press mold used in the method of the invention, and Figure 2 is a diagram showing the mold according to the first embodiment of the method of the invention. FIG. 3 is a partially enlarged cross-sectional view of the same hot press state as above, and FIG. 4 is a conceptual diagram showing the start of pressing using the press die of the second embodiment of the method of the present invention. 5 is a partially enlarged sectional view showing the heat-pressed state of the same as above; i6 is a slope view of the carrier bag of the present invention; FIG. 7 is an enlarged side sectional view of the handle attachment part; FIG. 8 is a partially enlarged front view of the handle attachment part. Tooth-shaped heat press mold s (7) L7J...Two-ply synthetic resin camphor shank, 18) ts)...Intermittent tooth-shaped heat melting layer, P fist Φ/synthetic resin bag body.

Claims (2)

[Claims] (1) Thick U-shaped two-ply synthetic resin handles are folded and transported by an appropriate automatic handle manufacturing and conveying device, without applying non-fusion treatment to the contact surfaces of each other. Upper and lower surfaces are formed by arranging concave and convex tooth shapes on the inner surface of the bag mouth of each bag body manufactured by heat-sealing and cutting synthetic resin bag material in a ring line such as in a column in a vertically opposing engagement or a non-opposing alternating engagement. A method for attaching a two-ply synthetic resin handle to a synthetic resin carrier bag, which is characterized by heat-pressing with a pair of tooth-shaped heat press molds and heat-sealing the handle to an intermittent tooth mold of a ring line. (2) Synthetic resin bag J also has a thick U-shaped two-ply synthetic resin handle (7 bar 7) against the bag opening. A synthetic resin carrier bag characterized by being attached in the form of fusion i8) t8).