JPS5865072A - Air permeable water-proof sheet and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a breathable waterproof sheet using a tetrafluoride resin sheet.

As shown in Fig. 1, a conventional waterproof sheet of this type is made by pasting a stretched film (2) of tetrafluoride resin on the back side of a breathable sheet (1) made of woven fabric, etc. with an adhesive, and then A backing sheet (3) having a coarse fiber composition was similarly attached to the surface. In this case, the stretched film of the tetrafluorocarbon resin has many cracks in the longitudinal direction due to the stretching in two directions, and the tetrafluorocarbon resin has the property of repelling water (hereinafter referred to as non-hydrophilic). It becomes a breathable waterproof sheet.

However, since the non-hydrophilic film that exhibits this waterproofing function is placed in the middle layer of a three-layer waterproof sheet, if it comes into contact with water or other liquids for a long period of time, the liquid may damage the surface layer of the fabric, etc. The breathable sheet (1) loses its breathability and becomes heavy due to water absorption by the surface layer of the breathable sheet (1).

In addition, in the conventional production of waterproof sheets mentioned above, non-hydrophilic film)
・In order to make the film breathable, it is necessary to stretch it in two directions before pasting it, and the non-wood-loving film and the breathable sheet must be pasted together using an adhesive, etc.
In addition to the complicated and troublesome manufacturing process, we also had to be very careful about how to store the cement.

The present invention has been made in consideration of the above points, and the first object of the present invention is to make the breathable sheet itself waterproof so that the waterproof sheet becomes a single layer.

The structure of the first invention is that a tetrapartite resin is welded to each component fiber of the breathable sheet. According to the above-described first invention, a tetrafluoride resin is attached to each composition fiber constituting the breathable sheet, and this tetrafluoride resin layer repels water to prevent water from passing through. It is very difficult to use as a waterproof sheet. Therefore, a waterproof sheet is formed from a single layer of an air-permeable sheet containing a tetrapartite resin.

Since this first EJLI has the above configuration, it has the following unique effects.

(1) Since the waterproof sheet has a single layer with zero air permeability rate, it is more difficult to use than the conventional three-layer structure.

(2) Composition of 0 Breathable Sheet W, K is mixed with tetrafluorocarbon resin. Like a waterproof sheet, the breathable sheet on the garment side and the stretched film of tetrafluorocarbon resin are peeled off. There is no table.

Next, the second invention of the present application is aimed at adding INI to the method of manufacturing a waterproof sheet of the first invention, and in particular, to make the consistency between the tetrapartite resin and the composition fiber of the breathable sheet unnecessary. do.

The second invention of the wooden sword is to apply an emulsion-like material of tetrafluoride paste to the opening of a breathable sheet, temporarily dry it, and then dry it in the bearish type humidity range of Shikai Kakizou. The fluorinated resin layer and the breathable sheet are both pressed together with pressure rollers to allow the tetrapartite resin to enter the breathable sheet, and in a later step, the tetrapartite resin is heated to the molten female area, and in the heated state. Pressure rollers are pressed against both sides of the index sheet to weld the tetrafluorocarbon resin to the constituent fibers of the breathable sheet.

In this second gate, as described above, the tetrapartite resin is applied to the surface of the breathable sheet in the form of an emulsion, and in the second step, the tetrapartite resin is heated and pressurized to form the part inside the breathable sheet. 1', the resin is further penetrated, and 1111, the tetrapartized resin is welded to the constituent fibers of the breathable sheet by applying pressure in the melting temperature range. Therefore, since the tetrapartite resin is dispersed and penetrated into the breathable sheet, it is heated and pressurized.
The melting of the tetrapartite resin and the constituent fibers of the breathable sheet results in a melting point.

Since the second invention has the above configuration, it has the following unique effects.

Since the tetrafluorocarbon resin is dispersed and penetrated into the breathable sheet and then heated and pressurized, the tetrafluorocarbon resin is also dispersed and penetrated into the composition fibers of the breathable sheet in this heating and pressing process. The river fat is uniformly dispersed and penetrated into the breathable sheet, and there is no inconvenience that the waterproof performance differs in each part of the breathable sheet. In other words, the waterproof performance is made uniform.

Hereinafter, embodiments of the present invention will be described based on one example.

FIG. 2 shows a schematic diagram of an embodiment of the inventive method,
The breathable sheet U+, which is the base sheet of the waterproof sheet, is run and rolled from the starting roll (A) to the product roll CB).

(4) is a coating device, which emulsifies the four-part paste and stores it in a container (5), and from a discharge port (7) connected to this container, a breathable sheet l is applied. ) A tetrapartized resin in the form of an emulsion is applied. Here, the discharge port +71 is the breathable sheet (1)
The air permeable sheet (1) is opened over the entire width direction, and at the same time that the air permeable sheet (1) passes through the coating device, an emulsion-like tetrafluorocarbon resin is applied over the entire upper surface of the air permeable sheet.

In order to make the tetrafluorocarbon resin into an emulsion form, the tetrafluorocarbon resin may be mixed into a solution of a surfactant and water in a suitable proportion.

A first dry blood supply (8) is provided following the application device,
By this device, the tetrafluorinated resin layer (F), water, and surfactant applied to the breathable sheet (1) is vaporized. In this state, 1. It appears that a certain amount of fat has penetrated into the breathable sheet (1).

Next, heat the semi-finished product at C (, +91, +9) with one pressure roll to a temperature of 1°C (for example, 1°C ~ 250°C). This first pressure roll +91, f9+
(!-'H is allowed to penetrate into the air-filled sheet (1).

+III The first pressurizing roll +9+, +91 rinsing device and the second drying device are arranged in sequence, and the excess tetrafluorocarbon resin is washed and removed by the sieve #cleaning device 00). be done.

+121, 1I2ifd% 2 Pressure rolls are used to contact the semi-finished sheet (G) with the same pressure from the front and back sides, and the humidity of each roll is set at the melting temperature of the tetrafluoride resin (280°C to 300°C).
The semi-finished sheets are pressed together under heating conditions, and the tetrapartite resin is transferred to the air-permeable sheet (1).
1 anti-#Ik, weld and diffuse on the shaft.

Following the second pressure roll 03't 1121, a plurality of finishing pressure rolls (131, (13+) are installed in series, ftJ second pressure rolls t121, (12)
The portion of the tetrapartized resin protruding from the sheet passing through the sheet is pushed into the sheet, the surface of the sheet is finished and formed, and then the product roll (B) is rolled into K rolls.

After going through each of the above steps, a waterproof sheet is completed as described above, and the cut structure of this waterproof sheet is as shown in Fig. 3, and the composition of the breathable sheet is made of fibers.

(2)) It has a structure in which the tetrafluorocarbon resin 21+ is dispersed and adhered to the entire area, and the tetrafluorocarbon resin 21+ remains in a space between each other to ensure air permeability on the front and back sides.

Furthermore, since the tetrapartite pastes L211 and I21+ are welded to the composition fibers (5)j and Oj, the bond between them is strong, and there is no fear that they will easily peel off during washing or the like.

Furthermore, since the breathable sheet of the first invention produced by the method of the second invention has the tetrafluorocarbon resin QI) dispersed and welded over the entire area, the tetrafluorocarbon resin has excellent heat resistance and flame retardancy. Due to its properties, it does not burn easily even when exposed to flames, that is, it has excellent flame retardant properties.

4. A simple diagram between 141 and 1 town Figure 1 is a sectional view of a conventional breathable tarpaulin sheet, Figure 2 is a schematic diagram of an embodiment of the second invention method, Figure 3 is an embodiment of the first invention method. FIG. 2 is a cross-sectional view of the finished product obtained by the second firing method. In the figure (1)...Breathable sheet (9)...10th rule (10)...Cleaning device till...
...Second drying table 1μ (121...Second pressure roll agent Patent attorney Yoshihiro Itakami

Claims (1)

[Claims] l) Tetrafluorocarbon resin is welded to each of the constituent fibers of the 8 breathable sheets.
2) Apply an emulsion-like material of tetrafluoride resin to the surface of the 9 breathable sheet, dry it, and then apply tetrafluoride resin in the heat deformation temperature range of the tetrafluoride resin. The resin layer and the breathable sheet are pressed together with a pressure roller to infiltrate the tetrafluoride resin into the breathable sheet, and in a subsequent step, the sheet is heated to a melting temperature range of the tetrafluoride resin. A method for manufacturing a breathable waterproof sheet, in which a pressure roller is applied from both sides to weld a tetrafluoride resin to the composition fibers of a breathable sheet.