JPH07331521A - Method for sealing seam part in dry suit - Google Patents

Abstract

PURPOSE:To improve the filling and sealing up operating efficiency for joining dry suit fabrics or waterproofing a sewn seam by coating a stretchable tape with a mixture of an application agent with a hot-melt adhesive and then bonding the coated tape to the seam part. CONSTITUTION:This method for sealing a seam part in a dry suit is to bond butt ends 27 and 29 of two cut sheets 21 and 23 with an adhesive, sew the resultant joined seam 25 with sewing yarns 39 and 41, cover the seam part with a stretchable tape 33 coated with a mixed binder of a tacky agent with a hot-melt adhesive, contact bond the stretchable tape to the seam part in the direction of an arrow (A) with a pressing iron, thereby bond the tape to the seam part, make the hot-melt adhesive flow by hot melting, pass the melt through fiber layers 35 and 37 stretched with a nylon jersey to reach a substrate 45, return the temperature of the adhesive to normal one and form a watertight seal with the formed resinified binder layer 43. Thereby, the sufficient waterproofness can simply be ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing process of a dry suit worn in diving work, scuba diving, and the like, and more specifically to a method of ensuring watertightness at a joint portion of a cloth.

[0002]

2. Description of the Related Art Suits worn for work or leisure in water are generally made of foamed polyurethane rubber with closed cells as the base material and nylon jersey cloth on the front and back surfaces. And is commonly used as a wet suit or a dry suit. Such a dry suit must be constructed so as to completely isolate the body from the water of the outside world, since one purpose is to protect the body temperature from the water temperature. Therefore, the dry suit is required to have a waterproof structure that prevents water from entering the suit through the joint portion of the cloth, and must also withstand a certain amount of water pressure. That is, in the seam, it is necessary to fill the thread passage hole by stitching and the joint between the constituent pieces with a sealing agent, and apply a seal from the back side to seal watertightly.

A conventional method for sealing a seam and a stitched portion in a dry suit is as shown in a flow chart of FIG.
Subsequent to the fabric cutting step 401, a step 402 of bringing the edges of the cut pieces of the dry suit into contact with each other, bonding them with an adhesive and sewing them together, and a step 4 of applying a sealing agent with a brush
03 and its drying step 404, a step 405 of applying a brush for applying an adhesive agent for adhering the sealing member to be brought into contact with the seam portion for sealing, and a step 406 of positioning and adhering this sealing member.

[0004]

In the conventional manufacturing process,
In order to obtain a reliable bond of the sealing member, a good adhesive surface of the sealing material must be formed on the surface of the nylon jersey. However, due to the use of a sealing agent that has a good affinity with nylon fibers, a single application of the brush will cause the sealing agent to be absorbed between the meshes of the nylon jersey fiber, and will not form an effective sealing. Moreover, a good adhesive surface for the seal cannot be obtained. Therefore, it is necessary to repeat brush coating and drying several times to fill the nylon jersey surface with the filling of the sealing agent to form an adhesive surface for sealing. However, since most of the joints have a three-dimensional curved surface, the application of the sealing agent has to be done by an extremely troublesome work such as brush painting by hand including the step of applying the adhesive. Therefore, it is difficult to perform the manufacturing process in a flow-type manner, and improvement in workability cannot be expected.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to simplify the manufacturing process, improve the workability of joining the joint portion of the cloth, and improve the production efficiency.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention employs a manufacturing process in which cut fabric pieces of a dry suit are brought into contact with each other, and the edges are joined with an adhesive to form a joint portion. A step of stitching and positioning an elastic tape coated with, for example, a rubber-based mixed binder made of an adhesive and a hot-melt adhesive so as to cover the joint portion, heat-pressing the elastic tape, Adhesive tape to the seam portion. Further, the stretchable tape used in the bonding step has a release paper laminated on the coated surface side of the mixed binder, and is formed into, for example, a continuous roll having a predetermined width. Further, it is preferable to use the same material as the base material of the cloth forming the dry suit for the elastic tape.

[0007]

In the present invention, the elastic tape to be used as the stitch is coated with, for example, a rubber-based binder prepared by mixing the adhesive and the hot-melt adhesive in advance. Only the adhesiveness of the adhesive becomes effective. Therefore, it is possible to cause the elastic tape to adhere to the joint portion of the cloth by the action of the adhesive and to easily temporarily fix the adhesive position. When the bonding surface of this elastic tape is heated and pressure bonded to the surface of the fabric of the dry suit, the adhesive has a hot-melt property, so at high temperatures it becomes a viscous fluid that penetrates well into the fiber layer on the surface by pressurization. When reaching the material surface and returning to room temperature, it can exhibit an effective sealing effect together with a good adhesive force. As a result, it is possible to omit the troublesome manual brush coating process of the sealing agent, the drying process thereof, and the adhesive brush coating process.

Since the stretchable tape to be adhered is formed into a continuous roll, for example, by laminating a release paper on the adhesive surface, it suffices to peel off the release paper only for the portion necessary for adhesion and to use it. It is possible to avoid the interference of the adhesive surface of the other with other parts, which is convenient for handling, and it is possible to easily work even on a curved seam portion or a stitched portion. Also, by making the material of the stretchable tape to be bonded the same as that of the dry suit base material, there is no difference in stretchability between the seam portion of the dry suit and other portions, so that there is no discomfort in wearing. Moreover, the motor function is not disturbed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a flow of steps based on a method of sealing a seam portion in a dry suit according to an embodiment of the present invention. The material cut in the first step 11 is spliced in a shape suitable for the human body in the second step 12. In this case, an adhesive is applied to the seams of the joints to join them to each other, and the front side and the back side are sewn together with a thread. Up to this point, there is no difference from the conventional process. On the other hand, a stretchable tape of the same material as the base material of the suit cloth is coated with a rubber-based binder in which a pressure-sensitive adhesive and a hot-melt adhesive to be described later are mixed, and a release paper is laminated on the coated surface with a predetermined width. A tension tape formed into a continuous roll is prepared.

In the third step 13, the stitch tape is cut into a required length corresponding to the length of the seam, and the release paper is peeled off and temporarily fixed along the seam from the back side of the suit. At this point, the stretchable tape is only affected by the adhesive, so that the position can be corrected until the proper position is aligned. Then, using an industrial iron, the tape is heat-pressed uniformly over the entire surface from the side of the elastic tape. After confirming sufficient penetration of the flowing adhesive into the mating fabric by heating and pressure bonding, by returning the heated portion to room temperature, it is possible to obtain waterproofness that is completely watertight at the joint portion.

FIG. 2 is a plan view schematically showing the seal portion of the seam of the dry suit to which the sealing method of the seam portion according to the present invention is applied, from the back side. Reference numerals 21 and 23
Is a chopped cloth having a nylon jersey on the front and back surfaces of a base material made of foamed polyurethane rubber having closed cells. Reference numeral 25 is a seam in which the cut edges 27 and 29 of the two cut cloths 21 and 23 are brought into contact with each other and joined with an adhesive. 31 is an example of a stitching pattern. Reference numeral 33 denotes an elastic tape used as a stitch, and shows a state in which the tape is wholly pressure-bonded in the direction shown by arrow A in FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2 and is exaggerated for ease of understanding. Moreover, the same members as those in FIG. 2 are denoted by the same reference numerals.
Reference numerals 35 and 37 denote nylon jersey-tensioned fiber layers applied to the front and back sides of the fabrics 21 and 23. 39,41
Is a suture. Reference numeral 43 denotes a binder layer which is fluidized by hot melt, returned to room temperature and made into a resin, penetrates and permeates through a nylon jersey-tensioned fiber layer and reaches a base material 45, and has a sealing effect and complete adhesion to the base material 45. It fulfills its function and, despite the simplification of the process, a watertight seal is applied to ensure complete waterproofness.

A mixed binder having a solid content of 50 to 55% and a main solvent of triol and having a viscosity of 5,000 ± 1,000 cps / 25 ° C., which is composed of synthetic rubber and synthetic resin as main components, used for various adherends is used for various adherends. Table 1 shows general performance when the composition was applied at room temperature and when it was thermocompression-bonded by hot melt at 150 ° C. using an industrial iron. It has been empirically confirmed that when an adhesive having such a performance is used for adhesive bonding to a seam of a dry suit in this example, sufficient resistance to water pressure or movement in water is exhibited.

[0014]

[Table 1]

A performance test was carried out by adding this mixed binder to cotton canvas.
A test piece was prepared by applying a thickness of 5 ± 3 μ (dry) and aging it at a temperature of 20 ° C. for 7 days, and cutting it into a width of 25 mm. In the table, the values relating to the adhesive force or adhesive force are the peeling strength when the 180 degree peeling strength test is conducted at a pulling speed of 300 mm / min. It is shown in. Regarding the holding power, in the atmosphere of 60 ° C., 1 kg was applied per 25 mm × 25 mm of the adhesion area, and the movement amount after 60 minutes was measured in mm unit. The symbol NC in Table 1 indicates that the amount of movement exceeding 1 mm was not observed.

[0016]

As described above, in the method of sealing the seam portion in the dry suit according to the present invention, the seams joined or sewn in the dry suit fabric are watertight by sealing and sealing for waterproofing. In addition, since the adhesive and the hot-melt adhesive are mixed and applied to the elastic tape in advance, it is possible to omit the conventional step of filling the brush by hand and the step of applying the adhesive by brush. As a result, the manufacturing process of the dry suit is simplified without losing the waterproof effect due to the conventional sealing and sealing, and the workability is improved because it can cope with curved surfaces well. In addition, it is possible to shift to the line work, the difficulty and uncertainty of the manual work are eliminated, the process control becomes easy, and the productivity can be improved. Furthermore, since there is no manual brush painting, a beautiful finish can be obtained and the commercial value can be increased.

[Brief description of drawings]

FIG. 1 is a flow chart showing a process when a method of sealing a seam portion in a dry suit according to the present invention is applied.

FIG. 2 is a plan view schematically showing a seal portion of a seam in the dry suit according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a flow chart showing steps of a method of sealing a seam portion in a conventional dry suit.

[Explanation of symbols]

 11 First Process (Cutting Fabric) 12 Second Process (Seam Adhesive Stitching) 13 Third Process (Adhesive Elastic Tape) 21 Fabric 23 Fabric 25 Seam 27 Small Edge 29 Small Edge 31 Stitching Pattern 33 Elastic Tape 35 Fiber Layer (Front side) 37 Fiber layer (Back side) 39 Suture thread 41 Suture thread 43 Binder layer 45 Base material

Claims (3)

[Claims] 1. A step of attaching cut fabric pieces of a dry suit to each other, joining edges with an adhesive to sew seams, and applying a mixed binder of an adhesive and a hot-melt adhesive The stretchable tape is positioned so as to cover the joint portion, and the stretchable tape is heat-pressed to bond the stretchable tape to the joint portion. Sealing method. 2. The stretchable tape used in the adhering step is formed by laminating a release paper on the coated surface side of the mixed binder, and peeling off the release paper for adhesion during use. The method of claim 1, wherein 3. The method according to claim 1, wherein the elastic tape is made of the same material as the base material of the cloth forming the dry suit.