JPS59211Y2 - Flame retardant laminated sheet - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flame-retardant laminate sheet that has a surface film that has excellent color fastness, heat sealability, and adhesive strength to a base fabric, and has improved productivity.

More specifically, polyolefin 100 in the entire sheet is laminated to a woven or nonwoven fabric (base fabric) produced using a high-density polyethylene stretched tape containing chlorinated polyethylene and/or chlorinated paraffin and antimony oxide, for example, antimony trioxide. Total chlorine content per part by weight is 1
The present invention relates to a flame-retardant laminated sheet for use in construction work and other applications, in which low-density polyethylene is laminated on one or both sides of a cloth so that the content of antimony oxide is 0.01 part by weight or more.

All of the flame-retardant laminated sheets that have been used conventionally have a flame-retardant structure on their outermost layer, and although their flame-retardant effect is recognized, due to their flame-retardant structure, they may discolor when exposed to light or heat, or they may not be as durable as the P1 seal. In addition to being difficult to handle, such as poor properties and a sticky surface, resins containing flame retardants tend to generate gels due to thermal decomposition, so if this is extruded and laminated as a surface film, the product will have a poor appearance. There are also productivity problems such as easy handling, and improvement of these drawbacks is strongly desired.

The inventors of the present invention completed the present invention as a result of repeated studies aimed at improving the drawbacks of these conventional products.

That is, the product of the present invention does not have a flame-retardant structure for the outermost film layer, but is a woven or non-woven fabric (base fabric) manufactured using a stretched high-density polyethylene tape with a flame retardant added to the inner layer.
It is characterized by the use of

As described above, flame retardant sheets 1 to 1 according to the present invention have no flame retardant added to the outermost film layer, so the heat sealability of the surface layer is good and there is little discoloration due to light or heat.

In particular, since low-density polyethylene is laminated, post-processability is improved.

Furthermore, when a film is laminated on both sides of a woven or nonwoven fabric, diffusion of the flame retardant in the inner layer to the surface is suppressed.
It becomes possible to maintain the flame retardant effect for a long period of time, and it is also possible to prevent the surface from becoming sticky.

In the present invention, the flame retardants added to high-density polyethylene for the purpose of flame retardation are chlorinated polyethylene and chlorinated paraffin, and both may be used in combination.

The flame-retardant laminated sheet of the present invention is made by laminating a low-density polyethylene film on one or both sides of a high-density polyethylene stretched tape base fabric manufactured by blending these flame retardants. The content of polyethylene in the entire laminated sheet (base fabric and surface film) is 100%
It is necessary to use 1 part by weight or more per part by weight.

If the amount is less than 1 part by weight, the flame retardant effect will decrease.

The chlorine content in the base fabric is determined as appropriate so that the desired degree of flame retardant effect can be obtained as long as the chlorine content in the entire laminated sheet does not fall below the above minimum value. The amount is 3 to 20 parts by weight per 100 parts by weight of high-density polyethylene.

If it exceeds 20 parts by weight, the strength of the tape will decrease.

On the other hand, the content of antimony oxide must be 0.01 part by weight or more per 100 parts by weight of polyethylene in the entire laminated sheet h.

If the amount is less than 0.01 part by weight, the laminated sheet will not have sufficient flame retardancy.

The antimony oxide content in the base fabric is also appropriately selected within the range that the antimony oxide content in the entire laminated sheet does not become less than the above minimum, but in normal cases, per 100 parts by weight of high-density polyethylene in the base fabric, It is blended in an amount of 1 to 20 parts by weight.

If it is added in an excessive amount, the strength of the tape will decrease, which is not preferable.

The ratio of the antimony oxide content to the above-mentioned chlorine content is preferably 0.05 to 5 by weight.

Furthermore, the low-density polyethylene film laminated on one or both sides of the base fabric made of high-density polyethylene stretched tape has a thickness such that the chlorine content is at least 1 part by weight or more and the antimony oxide content is at least 0.01 part by weight in the entire laminated sheet. must be set.

If each of these contents falls below these values, the flame retardancy will be significantly reduced.

The various conditions necessary for the flame-retardant laminate sheet of the present invention have been described above, and one example of this embodiment is as follows.

100 parts by weight of high-density polyethylene, 12 parts by weight of chlorinated polyethylene containing 40% chlorine, 2.5 parts by weight of chlorinated paraffin containing 70% chlorine, 5 parts by weight of antimony trioxide
This sheet is made by laminating low-density polyethylene to a thickness of 40 μm on both sides of a woven fabric made from a stretched tape made from a composition containing 0.5 parts by weight of a stabilizer.

This sheet contains 3.3 parts by weight of chlorine and 2.5 parts by weight of antimony trioxide per 100 parts by weight of polyethylene.
Contains in parts by weight.

Next, the structure of the flame-retardant laminate sheet of the present invention will be explained with reference to the accompanying drawings.

Figure 1 shows a flame-retardant laminated sheet using a woven fabric made of high-density polyethylene stretched tape, and Figure 2 shows cross-sectional views of flame-retardant laminated sheets 1 to 1 using a non-woven fabric made of the same material. It is something.

In the figure, 1, 4 and 11.14 indicate low-density polyethylene film layers not containing a flame retardant, and 2, 3, 12, and 13 indicate stretched tapes containing a flame retardant.

As detailed above, compared to conventional flame-retardant laminated sheets, the present invention makes it possible to maintain the flame-retardant effect for a longer period of time, and also significantly improves properties such as surface stickiness and processability. In other words, it has a wide range of industrial uses, and
The present invention provides a flame-retardant laminated seal with extremely high practical value.

[Brief explanation of drawings]

FIG. 1 shows a sectional view of a flame-retardant laminate sheet using woven fabric, and FIG. 2 shows a sectional view of a flame-retardant laminate sheet using non-woven fabric. 1, 4.11.14... Film layer containing no flame retardant, 2, 3.12.13... Stretched tape containing flame retardant.

Claims (1)

[Scope of utility model registration request] A laminated sheet consisting of a woven or nonwoven fabric made from a stretched tape of high-density polyethylene and a film of low-density polyethylene laminated on one or both sides of the woven or non-woven fabric, wherein the high-density polyethylene constituting the stretched tape is chlorinated polyethylene and/or Or, it contains chlorinated paraffin and antimony oxide, and the chlorine content in the entire laminated sheet is 1 part by weight or more per 100 parts by weight of polyethylene in the entire laminated sheet, and the antimony oxide content is 0.
．． A flame-retardant laminated sheet characterized by having a content of 0.01 parts by weight or more.