JPH0446920Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a waterproof tape for repairing waterproof heavy fabrics, and more specifically, it is a tape for repairing waterproof heavy fabrics that can be wound into a roll without release paper. The present invention relates to waterproof tape for use.

Conventional Technology Vehicle/ship hoods, covering sheets, tents, etc. made of waterproof heavy fabrics, such as waterproof canvas and tarpaulin, are exposed to sunlight (ultraviolet rays), wind and rain for long periods of time outdoors, and are exposed to sunlight (ultraviolet rays), wind and rain, and exposed to speeding vehicles and ships. They often break due to strong wind pressure. Conventionally, such tears are often repaired using plastic film, adhesive tape, cloth, paper, etc., but it is difficult to repair with sufficient durability using such repair materials.

For this purpose, a repair fabric has been developed that includes a knitted fabric as a base fabric, has at least one side waterproofed, and has an adhesive layer formed on one side.

For example, Utility Model Publication No. 55-9621 describes how to repair canvas, sheets, etc. by forming a thick adhesive layer on the back side of waterproof fabric and attaching a release paper such as Hatron paper or paraffin paper to this adhesive layer. A waterproof fabric is disclosed.

In addition, in Japanese Utility Model Application Publication No. 56-108528, a soft resin waterproof layer is formed on both the front and back sides of a synthetic fiber base fabric, an adhesive is thickly applied to the back side, and Hatron paper or paraffin paper is applied on the adhesive layer. , or a waterproof fabric for repairing canvas, sheets, etc., to which a resin separator is attached is disclosed.

When the above-mentioned conventional repair waterproof cloth is stored, it is necessary to use a separator such as release paper to prevent the adhesive layer from sticking. This release paper is originally unnecessary for repairs, and furthermore, the use of release paper increases the cost of repair waterproof fabric, increases its thickness and weight, and causes inconvenience in storage and handling. was.

Furthermore, when using the conventional repair waterproof fabric as described above, it is necessary to first peel off the release paper or separator from the repair waterproof fabric before the repair operation. This caused the inconvenience of having to discard or incinerate the waste.

Furthermore, Utility Model Application Publication No. 48-100846 discloses a fibrous base sheet, a waterproof rubber layer formed on one side of the sheet,
A heat-sensitive adhesive sheet having a heat-sensitive adhesive layer formed on the other surface is described, but when an adhesive sheet with such a configuration is used to repair waterproof heavy fabric, the cut surface of this repair sheet However, there was a problem in that rainwater and the like penetrated into the fibrous base sheet and the repair sheet eventually peeled off from the waterproof heavy fabric.

Problems to be Solved by the Invention Therefore, the present invention has solved the problem by providing a waterproof tape for repairing waterproof heavy fabrics that does not require the use of release paper or separators, and does not allow rainwater to enter through the cut surface. It is therefore an object of the present invention to provide a waterproof tape for repairing waterproof heavy fabrics which can solve the above-mentioned problems and exhibit good adhesive properties with simple work.

Means for Solving the Problems In order to solve the above problems, the waterproof tape for repairing waterproof heavy fabrics of the present invention has a base fabric made of fiber fabric, and a waterproof tape impregnated with the base fabric and made of a flexible synthetic resin. The adhesive layer is formed on one surface of the waterproof core layer and is made of a hot melt adhesive.

In the waterproof tape of the present invention, the waterproof core layer is composed of a base fabric made of fiber cloth and a waterproofing agent impregnated into this base fabric and made of a flexible synthetic resin. Such a waterproof core layer has good flexibility. An adhesive layer made of a hot melt adhesive is formed on one of the front and back surfaces of the waterproof tape for repairing waterproof heavy fabric of the present invention.

Further, this repair waterproof tape may be wound into a roll.

Function: Embodiments of the waterproof tape for repairing waterproof heavy fabrics of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a waterproof repair tape 1 is composed of a waterproof core layer 2 and a hot-melt adhesive layer 3 formed on one surface thereof. The waterproof core layer consists of a fiber fabric and a flexible synthetic resin waterproofing agent impregnated therein.

The repair waterproof tape 1 of the present invention may be wound into a roll with either side facing outward, as shown in FIG. There is no problem such as stickiness of the roll. The repair waterproof tape rewound from the roll can be used for repairs as is.

After the repair is completed, the surface of the repaired area is protected by the waterproof surface of the waterproof core layer, and the repaired area exhibits good waterproofness and water repellency, as well as good abrasion resistance. Therefore, the durability of the repaired portion is high, and its weather resistance is also improved.

There are no particular limitations on the fiber fabric used as the base fabric for the waterproof repair tape of the present invention, including natural fibers,
It may be a knitted fabric, a woven fabric, or a non-woven fabric made of inorganic fibers or synthetic fibers, but it is generally preferable to use a fabric similar to the heavy fabric to be repaired.

There are no particular limitations on the waterproofing agent impregnated into the base fabric, and waterproofing agents made of flexible synthetic resins commonly used for waterproofing fabrics can be used. Flexible synthetic resins for waterproofing agents include polyvinyl chloride resin, polyamide resin (nylon 11, nylon
12), ethylene-vinyl acetate copolymer resin, chlorosulfonated polyethylene resin, polyurethane resin, and other known commercially available resins can be used. To form a waterproof core layer, the base fabric may be impregnated with a paste of these waterproofing agents. In this case, a portion of the impregnated waterproofing agent coats the surface of the base fabric, forming a waterproof surface.

In the waterproof repair tape of the present invention, a hot melt adhesive layer is formed on one surface of the waterproof core layer. Such hot melt adhesives include polyolefin polymers that have been modified with a modifier such as a carboxylic acid or a silane compound, in the presence of an organic peroxide, or by other methods to impart adhesive properties; For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, etc., polyvinyl acetal, acrylic resin, cellulose polymer, polyamide resin, polyester resin, polyfluoroethylene propylene copolymer, alkyd resin, ethylene cellulose, vinyl acetate. Resins and their derivatives, butyl methacrylic resins, polyisobutylene, hydrocarbon resins, ethylene terpolymers, plasticized phenoxy resins and transpolyisoprene,
At least one other selected from publicly known and commercially available products.
It may also include members.

The hot-melt adhesive layer must be capable of melting and exhibiting adhesive activity at a temperature lower than the temperature at which the constituent fibers and waterproofing agent of the waterproof core layer melt, decompose, or change in quality. Furthermore, from a practical standpoint, the hot melt adhesive used in the present invention generally preferably has a melting point within the range of 70°C to 200°C, more preferably within the range of 75°C to 160°C. Considering adhesive workability, the hot melt adhesive used in this invention is 75~
It is even more preferable to have a melting point within the range of 130°C.

The hot melt adhesive layer is preferably transparent, but may be colored in a desired color. Even if it is colored, it is preferable that the hot melt adhesive layer is transparent.

The above-mentioned hot melt adhesive layer is formed by applying a solution or emulsion of the above-mentioned resin by a spraying method, coating method, or brushing method, or by pasting a film-like material made of the above-mentioned resin. You can.

The thickness of the hot-melt adhesive layer is not particularly limited as long as it can be bonded. Depending on the purpose of use, it is generally preferable to form an adhesive layer with a basis weight of 30 to 300 g/m ² .

The adhesive layer made of the hot melt adhesive according to the present invention has no tackiness unlike conventional adhesive adhesive layers, so it can be used for repairs without the need to intentionally provide release paper or a separator on the waterproofing agent layer. Enables smooth and free rolling and unwinding of waterproof tape. Therefore, when the waterproof repair tape is wound into a roll, the hot melt adhesive layer may be on the inside or outside.

In addition, in order to repair waterproof heavy fabric with the repair waterproof tape of the present invention, one side of the damaged part of the waterproof heavy fabric,
Alternatively, overlap waterproof repair tape pieces cut to the required size on both sides with the hot-melt adhesive layer surface in contact with the waterproof heavy fabric, and heat this overlapping portion with appropriate heating means, such as an iron or Apply pressure while heating with a hot pressure welding machine, dryer, etc.

Therefore, it is possible to perform repairs with strong shear adhesive strength through simple work. While the shear adhesion force of the repair sheet using conventional adhesive adhesive is about 10Kg/25mm, that of the waterproof repair tape according to the present invention is 60 to 90Kg/25mm. This waterproof tape has about 6 to 10 times the shear adhesive strength of conventional products.

Example Hereinafter, the present invention will be explained in detail with reference to examples.

A woven fabric with a plain weave structure as shown below was created using polyester single yarns as warp and warp yarns.

14S/1×14S/1/53×50 (strand/25.4mm) The basis weight of this fabric was 190g/m ² and the thickness was 0.3mm. This woven fabric was used as a fiber fabric base fabric with the following composition: PVC 100 parts by weight DOP 60 parts by weight CaCO ₃ 20 parts by weight Cd-Ba stabilizer 3 parts by weight Toluene 100 parts by weight Nituporan 3105 10 parts by weight Coronate L 2 parts by weight dipped in a waterproofing agent solution with 100% of water and squeezed with a mangle
The PVC resin was gelled and fixed by heat treatment at 190°C for 3 minutes. The amount of the waterproofing agent impregnated into the base fabric in this way was 200 g/m ² in terms of solid content. The water pressure resistance of the obtained waterproof core layer sheets is 2000
mm water column or more.

A waterproof core layer sheet having such water pressure resistance could be put to practical use as a truck top.

The above sheet is used as a waterproof core layer, and polyester SP-170 (polyester hot melt adhesive, mp=83℃, solution type,
(manufactured by Nippon Gosei Kagaku) was roll-coated and dried to form a hot-melt adhesive layer approximately 30 microns thick. The obtained repair waterproof sheet was cut into tapes with a width of 30 cm and wound into rolls.

Next, in order to repair a tear approximately 20 cm long in the truck hood sheet prepared separately, two pieces of the waterproof repair tape cut into 30 cm length were prepared, and these were used to sandwich the tear in the sheet in the center and tighten the sheet. 160
Heat and press thoroughly with an iron at ℃. As a result, the crack was firmly repaired.

The shearing strength of the repaired area was approximately 60 kg/25 mm, which was extremely excellent.

For comparison, the above repair was carried out using a comparative repair tape made by applying a conventional adhesive to a sheet, and the shear strength of the repaired area was approximately 10 kg/25 mm, which was unsatisfactory. It was hot.

Furthermore, almost the same favorable results were obtained when the above-mentioned waterproof repair tape was used to repair only one side of the above-mentioned truck top sheet.

Effects of the invention The waterproof tape for repairing waterproof heavy fabrics of the invention can be wound up without the need for release paper or separators. Therefore, the sheet has a small thickness and weight, is easy to store and handle, and is low in cost. Furthermore, there is no need to peel off the release paper or separator during use, and the roll can be rewound from the roll and immediately used for repair operations.

Furthermore, in the waterproof tape for repairing waterproof heavy fabrics according to the present invention, the adhesive layer is formed using a hot melt adhesive, which has not been considered as an adhesive for waterproof tapes for repairing waterproof heavy fabrics. It has advantages such as easy repair work, high adhesive strength of the repaired part, and no loss of beauty of the repaired part.

Moreover, the core layer of the repair waterproof tape after repair is
Since it is impregnated with a waterproofing agent made of flexible synthetic resin, not only the surface of the repaired area but also the cut side has good water repellency and waterproofness, and is also resistant to mechanical abrasion, sunlight, It is also protected from UV rays and weathering, increasing the practical durability of the repaired area.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of one embodiment of the waterproof heavy fabric repair tape of the present invention, and FIG. 2 is an explanatory view of a roll wrapped with the waterproof repair tape of the present invention. 1...Waterproof tape for repair, 2...Waterproof core layer,
3...Hot melt adhesive layer.

Claims (1)

[Claims for Utility Model Registration] 1. A waterproof core layer comprising a base fabric made of fiber fabric, a waterproofing agent impregnated into the base fabric and made of a flexible synthetic resin, and one surface of the waterproof core layer. A waterproof tape for repairing waterproof heavy fabrics, comprising: an adhesive layer formed thereon and made of a hot-melt adhesive; 2. The waterproof tape for repairing waterproof heavy fabrics, which is wound into a roll according to claim 1 of the utility model registration.