JPS5920651A - Flame-retarded sheet - 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 relates to a flame-resistant sheet.

When acrylic fibers or cellulose mm are fired in an oxidizing atmosphere at 200 to 300°C for 10 to 20 hours,
Semi-incombustible flame-resistant fibers having a carbon content of about 50 to 70 can be obtained. However, this flame-resistant fiber has no crimping and is fragile with a strength of less than 4 g/d, so even if it is used as a binding, it has poor air content and is easily misaligned. You can only get unstable things. For example, when a cigarette is placed on the fabric, the heat is easily transferred to the opposite side due to its poor air content, and even if the fabric itself does not burn, the object underneath may burn. Moreover, m
? Since it is a hard fiber, there is a problem in that it easily becomes fluffy due to friction. Therefore, even if this flame-resistant fiber is made into a knitted fabric as it is, it will not be possible to obtain a sheet with sufficient heat insulation and flame resistance.

The purpose of the present invention is to eliminate the above-mentioned problems, and to provide a W4 paper towel made of flame-resistant fibers as described above, which has excellent flame resistance and heat insulation properties, and has excellent flame resistance and Ig abrasion resistance. The reason is that we do not provide seats.

The flame-resistant sheet according to the present invention, which achieves the above object (11), consists of a woven fabric or an article fabric made of bound spun yarns made of flame-resistant fibers, and a non-flammable gold film or bonding film on at least one surface of the fabric. It is characterized by being coated with a resin film.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

FIG. 1 shows a longitudinal cross-sectional view of a flame-resistant sheet according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a woven fabric, which is knitted using a flame-resistant woven binding system, which will be described in detail later, as warp yarns 1a and weft yarns 1b. The surface of this sheet-like binding material 1 is coated with an aluminum gold plate film 3 via a wetting agent 2 mixed with a noncombustible substance such as a halide.

Since the fabric 1 is made of a spinning fabric, it has an IM structure with a higher air content and bulk compared to a fabric made of filament yarn. This air layer inside the wafer works effectively to improve the heat insulation properties of the fabric. In order to provide meaningful heat insulation properties, the air content of the woven fabric is preferably 50 to 0%, and the thickness t of the woven fabric is preferably 1 mm or more.

In order to effectively satisfy these requirements, the spinning system constituting the fabric should be a bundled spinning system as shown in Figure 2.
In addition, it is preferable that the IX is made of flame-resistant fiber. That is, the second
As shown in the figure, the bundled spun yarn 100 includes an am bundle 90 in which finite length fibers at the core are bundled in a non-twisted manner, and a plurality of bundles spirally surrounding this fiber bundle 9. It is composed of 99 fibers.

The stitched fabric 1 may be replaced with a knitted fabric if necessary.

Gold 11@3 serves as a non-combustible material and also serves as # of the substrate.
It also has the role of providing RG abrasion resistance to IA1a materials. However, although the flame-resistant fiber knit itself is fragile and easily fluffs, the gold 1143 coating gives it abrasion resistance and reduces friction with other objects. Therefore, it is possible to eliminate the inconvenience that the surface of the knitted fabric becomes fluffy and its original flame resistance and heat insulation functions are deteriorated. This gold fill*3 is a synthetic resin film with excellent thermal properties and abrasion resistance, such as polytetrafluoroethylene and silicone. It may be possible to change it. Moreover, such a gold film or a coated resin film may be applied to both sides of the knitted fabric at the same time, instead of being coated only on one side of the knitted fabric as in the above-mentioned embodiments.

Now, the bound spun yarn that is effective for constructing the above-mentioned knitted fabric can be manufactured by applying the known so-called bound spinning method. However, in this case, the raw material fibers used in the present invention are non-crimped, fragile and flame-resistant fibers with a strength of less than 4g/d, so even if the conventional binding spinning method is used as is, the above-mentioned It is not possible to obtain a binding system that is compatible with such flame-resistant sheets. Therefore, it is preferable to manufacture it as follows. That is, a tow of fragile flame-resistant fibers with no crimping and a strength of 4 g/d or less,
First, the fibers are rubbed under tension to adjust the thickness, and then cut to form a fiber bundle made of finite length fibers, which are then given a draft of three times or more without being allowed to stagnate, and are then continuously false-twisted. The floating fibers at the periphery generated in the draft are tied spirally around the core striped bundle 9B at the center.
9, the yarn is wound and tied to make 10 bound spun yarns.

The above-mentioned flame-resistant sheet is made from a flame-resistant TS awl binding millet yarn, so it is not only flame-resistant and will not burn, but also has a high air content, so it can be used for cigarettes, etc. Even if a fire is placed on the sheet, heat is not easily transmitted to the opposite side of the sheet, making it possible to prevent ignition. Also,
There is a metal film or a metal film on the surface. Because it is coated with a resin film, weak flame-resistant fibers easily fluff due to friction)
The above-mentioned flame resistance and heat insulation properties can be maintained for a long period of time without any problems.

Since the sheet of the present invention has such excellent properties, it can be used in a wide range of applications requiring flame resistance and heat insulation properties. For example, underlayments under tables and carpet base fabrics where cigarettes easily fall off.

Tatami mats, firefighting uniforms, heat-resistant work clothes, curtains, and chair upholstery.

It can be effectively applied to initial fire extinguishing cloth for tempura, kotatsu blankets, disaster prevention head cloths, etc.

In addition, when the metal film is made of aluminum, it is possible to create a charcoal-like luster on the sheet surface in harmony with the fine irregularities of the knitted fabric, making it extremely effective as a reflector for camera photography.

As described above, the flame-resistant sheet of the present invention constitutes a bound or knitted fabric using a bound spinning system made of flame-resistant fibers,
At least one surface of this fabric is coated with a nonflammable metal film or composite J51! Since it has a +111 composition that covers the tree Pliii membrane, even if there is a certain amount of adhesion from the flame-resistant fibers, the sheet itself has an In addition, the metal film or synthetic resin bottle on the surface makes it possible to make a flame-resistant sheet with excellent IV abrasion resistance.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flame-resistant sheet according to an embodiment of the present invention, and FIG. 2 is a side view of bound spun yarn used in the sheet. 1. Fibers, 2. Wetting agents, 3. Metal films, 100. Binding and spinning systems. Agent: Patent Attorney Nobuo Ogawa - Patent Attorney: Sll Noguchi Patent Attorney: Kazuhiko Saishita Figure 1 Figure 2 Figure 2

Claims (1)

[Claims] 1. A flame-resistant sheet comprising a woven fabric or linear fabric made of bound spun yarn made of flame-resistant fibers, and at least one surface of the fabric is coated with a non-flammable gold film or synthetic resin film.