JPH03180560A - Weather-resistant woven or nonwoven fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject cloth, excellent in weather resistance and suitable as a distribution material such as container by laminating tapes with a resin layer containing a light-resisting agent as a surface layer and weaving the resultant tapes so as to cross the orientation axes. CONSTITUTION:The objective cloth obtained by extrusion molding (A) a crystalline thermoplastic resin such as high-density polyethylene and (B) the second thermoplastic resin prepared by blending (i) a low-melting thermoplastic resin such as low-melting polyethylene having the melting point of >=5 deg.C different from that of the component (A) with (ii) a light-resisting agent (2-hydroxy-4- methoxybenzophenone) in an amount of preferably 300-10000ppm based on the component (i) by, e.g. a multilayered T-die method and then unidirectionally orienting the molded product to afford multilayered tapes, subsequently weaving and laminating the resultant tapes so as to cross the orientation axes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a first thermoplastic resin layer and a second thermoplastic resin layer having a lower melting point than the first thermoplastic resin and containing an effective amount of a light stabilizer.
Alternatively, the present invention relates to a weather-resistant woven fabric/non-woven fabric in which a uniaxially oriented multilayer tape comprising a third thermoplastic resin layer is warped or weaved and heat-set, and a method for producing the same.

(Conventional technology) Conventionally, we have used thermo-0T plastic resin stretched tape (flat yarn), etc.! Woven and nonwoven fabrics obtained by weaving or laminating Q are well known.

However, these conventional woven and non-woven fabrics typically use adhesives such as hot-melt adhesives or fine fiber modified natural resins to prevent mesh misalignment, and require complicated processes. Not only that, but the mechanical strength and the like are also unsatisfactory.

Various types of nonwoven fabrics and methods for producing the same are also known.

For example, the most typical manufacturing method for nonwoven fabrics is the spunbond method.

This spunbond method involves introducing a melt-spun undrawn filament bundle into an aspirator jet, suctioning and jetting it with pressurized air, applying static electricity at the same time as stretching, and using the repulsive force to spread it into single yaa fibers. At the same time, this is a method of accumulating on a conveyor having an opposite charge to that of the filament, and many methods have been proposed so far.

(For example, Japanese Patent Publication No. 37-4993, Japanese Patent Publication No. 43-2
6599 Publication, Japanese Patent Publication No. 44-14913, Japanese Patent Publication No. 44-21817, Japanese Patent Publication No. 1941-1941, Japanese Patent Publication No. 1942-1942, Japanese Patent Publication No. 45-107
Publication No. 79, Special Publication No. 45-33876, Special Publication No. 4
Publication No. 6-3317, etc. ) Another method is to form a molten resin into a tubular film, stretch it,
A method of spreading and fixing split fibers m (split fibers) of a split network structure to a certain width, breaking the warp and weft, and bonding them (Japanese Patent Publication No. 47-2786, Japanese Patent Publication No. 47-473)
8, Special Publication No. 52-4672), etc., materials for FFI F used in

It is well known that when woven fabrics and non-woven fabrics made of these plastics are used outdoors, they deteriorate due to exposure to sunlight, rain, oxygen in the air, ozone, mold, etc.

In particular, as a measure against ultraviolet rays, heat, oxygen (including ozone), etc., methods such as adding or coating light stabilizers such as light stabilizers (UV absorbers, light stabilizers) and antioxidants to the resin are generally carried out. It is being said.

For example, one method is to knead a weathering agent directly into the resin, or in Japanese Patent Publication No. 36-2344, an organic polymer film is immersed in an ultraviolet absorber solution.
A method in which the solvent is evaporated and then heated to bond the surface layer of the film; Japanese Patent Publication No. 46-24160 discloses a method in which an ultraviolet absorber is dissolved in liquid polyhydric alcohol and applied, and JP-A No. 63-43972. JP-A No. 62-201237 and JP-A No. 62-2 disclose a method of applying weather-resistant paint.
No. 34924 discloses a laminate comprising a transparent film on the outer surface and an adhesive layer containing an ultraviolet absorber in the intermediate layer, and JP-A-62-238741 discloses a laminate comprising a transparent film on the outer surface and an adhesive layer containing an ultraviolet absorber in the intermediate layer. A film in which an acrylic resin film is provided on one or both sides of a vinyl resin film, and Utility Model Publication No. 62-37729 discloses a film in which an acrylic resin film containing ultraviolet absorption is provided on one side of a two-wheel stretched polyethylene terephthalate film. Japanese Patent Publication No. 62-59668 proposes a multilayer resin film in which a base layer made of a biaxially stretched film is laminated with a surface layer made of a uniaxially stretched film containing a weathering agent.

However, the method of directly injecting weathering agents etc. into the resin requires a large amount and uniform blending, which is not only economically expensive, but also, in the case of films,
When these are subjected to uniaxial stretching, there are problems such as uneven stretching and stretch breakage.

Furthermore, containing a large amount of additives or fillers in the base material layer to be stretched not only impairs the performance of the base material layer, but also causes stretch breaks and longitudinal cracks during the stretching process.

In addition, as seen in the prior art vR cited in Article E, there is a method in which an ultraviolet absorber solution or an acrylic resin containing an ultraviolet absorber is applied to the surface of the base material on a stretched film that has been stretched in advance, or a stretched film and an ultraviolet The method of laminating stretched films containing an absorbent involves complicated steps.

Furthermore, when considering the application of these methods to stretched tapes, when stretching a film that has been previously coated with an ultraviolet absorber solution or an acrylic resin containing an ultraviolet absorber,
Problems such as peeling of the coating film occur.

On the other hand, in the method of applying an ultraviolet absorber solution or acrylic resin containing an ultraviolet absorber to a narrow stretched tape, not only is there a large loss of the ultraviolet absorber solution or the acrylic resin containing an ultraviolet absorber. However, not only is the adhesion between the stretched substrate and the coating film low, but the light resistance is also questionable.

Furthermore, there are various problems such as environmental pollution caused by the solvent, safety, and management of the solvent.

[Problem to be solved by the invention]

As a result of extensive research to solve the above problems, the present invention has been found to have the effect by incorporating a light-resistant agent only into a thin surface layer, and to be fully applicable to the production of woven and non-woven fabrics that involve stretching. This discovery led to the completion of the present invention.

The first purpose is to provide a uniaxially oriented structure consisting of a first thermoplastic resin layer and a second or third thermoplastic resin layer that has a lower melting point than the first thermoplastic resin and contains an effective amount of a light stabilizer. An inexpensive and effective weather-resistant woven fabric/non-woven fabric made by laminating a warp-warf woven fabric or laminated multilayer tape, which contains a light-resistant agent only in the surface layer of at least two-layer structure.
A second object of the present invention is to provide a manufacturing method for manufacturing the woven and nonwoven fabrics described below at low cost.

[Means to solve the problem]

A first aspect of the present invention includes a first thermoplastic resin layer, and at least one side of the first thermoplastic resin layer has a melting point lower than that of the first thermoplastic resin.
Weaving or laminating a uniaxially oriented multilayer tape in which a second or third thermoplastic resin layer containing an effective amount of a light stabilizer is formed in a right angle or diagonal direction so that the orientation axes thereof intersect. A second aspect of the present invention is a weather-resistant woven fabric/non-woven fabric characterized by being heat-set. Before and/or after cutting a multilayer film formed by extrusion molding a second and/or third thermoplastic resin having a melting point lower than that of the thermoplastic resin and containing an effective amount of a light stabilizer into a tape shape, uniaxially oriented,
Woven or laminated in a right angle or diagonal direction so that the orientation axes of the sleeve orienting tapes intersect, the temperature is higher than the melting point of the first thermoplastic resin and higher than the melting point of the second or third thermoplastic resin. This is a method for producing weather-resistant woven fabrics and non-woven fabrics, which is characterized by heat-setting.

The first thermoplastic resin of the present invention and the second and third thermoplastic resins are not particularly limited as long as they have different melting points. It is preferable to use a crystalline thermoplastic resin.

Specifically, low, medium, and high density polyethylene, polypropylene, and polybutene with a density of 0.91 to 0.97 g/cm' are used.
1. Polyolefins such as α-olefin single polymers such as poly-4-methylpentene-1 and hexene-1, α-olefin mutual copolymers, polyamides, polyesters, borocarbonates, polyvinyl alcohol, polyvinylidene chloride, polychloride Examples include vinyl, saponified ethylene-vinyl acetate copolymer, and the like.

In terms of production, the second or third thermoplastic resin preferably has a melting point different from the first thermoplastic resin by at least 5°C or more, preferably 10°C or more, and more preferably 50°C or more.

For example, when using the second or third thermoplastic resin as an adhesive layer, low density polyethylene, density 0, 86
Ethylene-α less than ~0,94 g/cm3
-Olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-(meth)acrylic acid copolymer, ethylene-
It is preferable to use (meth)acrylic acid ester copolymers, ethylene-maleic acid or its ester copolymers, mixtures thereof, unsaturated carboxylic acid modified products thereof, and the like.

Specific combinations include medium-, high-density polyethylene, polybutene-1, poly-
When using polyolefins such as α-olefin homopolymers such as 4-methylpentene-1 and hexene-1, and mutual coelectrolytes of α-olefins, low-density polyethylene is used as the second or third thermoplastic resin. , density 0.8
Ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-(meth)acrylic acid copolymer, ethylene-(meth)acrylic acid ester copolymer, Examples include polyolefins modified with unsaturated carboxylic acids. For polyamides, polyesters, polycarbonates, polyvinyl alcohols, saponified ethylene-vinyl acetate copolymers, etc., polyolefins modified with unsaturated carboxylic acids or ethylene-vinyl acetate copolymers are mainly used.

The second or third thermoplastic resin may be of the same type or any of the 94 types.

FIG. 1 shows a first thermoplastic resin layer (A, A') and a second thermoplastic resin layer (B, B') according to an embodiment of the present invention.
) and a third thermoplastic resin layer (C.

FIG. 2 is a perspective view showing a nonwoven fabric obtained by warp-warp laminating multilayer stretched tapes made of C'), and FIG. 2 is a perspective view showing a woven fabric made by warp-warp weaving the resin.

Furthermore, in the above, woven fabrics/nonwoven fabrics having a three-layer structure of a first thermoplastic resin, a second thermoplastic resin, and a third thermoplastic resin are shown, but one side of the first thermoplastic resin layer A multilayer stretched tape having a two-layer structure in which a second thermoplastic resin layer is formed may be used.

The weather-resistant woven fabric/nonwoven fabric of the first aspect of the present invention comprises a first thermoplastic resin, and a second or third thermoplastic resin having a lower melting point than the first thermoplastic resin and containing at least a light stabilizer in advance. Before and/or after cutting a multilayer film of at least two or more layers produced by extrusion molding such as a multilayer inflation method or a multilayer T-die method, the film is uniaxially oriented in the longitudinal direction at a stretching ratio of 1.1 to 15 times. . If the stretching ratio during uniaxial orientation is less than 1.1 times, the mechanical strength of the woven or nonwoven fabric will not be sufficient, and if the stretching ratio exceeds 15 times, it will be difficult to further stretch it using conventional methods, and it will be expensive. There are problems such as the need for equipment.

The weather-resistant woven fabric/nonwoven fabric of the present invention can be obtained by weaving or laminating the uniaxially oriented multilayer tape as described above in a direction perpendicular or diagonal to the orientation axis and heat-setting it. .

The weather-resistant woven fabric/nonwoven fabric of the present invention has a surface layer with a low melting point.
Alternatively, at least an additive such as a light-resistant agent is blended into the second thermoplastic resin layer, and nothing is added to the preferably crystalline first thermoplastic resin layer of the base material layer, so that the stretching during stretching It is very economical and inexpensive because it does not break or reduce the stretching effect and maintains sufficient weather resistance.

The thickness ratio of the first thermoplastic resin and the second or third low melting point thermoplastic resin layer of the multilayer film is not particularly limited, but the thickness ratio of the low melting point second or third thermoplastic resin layer is not particularly limited. When used as an adhesive layer, the first heat hJff
It is preferably 50% or less, more preferably 40% or less of the l-type resin layer.

In addition, if the thickness of the second or third low melting point thermoplastic resin layer is 5 μm or more, it will have a light resistance effect, but it will also affect various physical properties such as economical efficiency, light resistance, and adhesive strength during heat fusion. In order to satisfy the requirements, the objective of the present invention can be achieved if the thickness is preferably in the range of 10 to 100 μm.

As the light stabilizer of the present invention, ultraviolet absorbers and light stabilizers such as benzotriazole type, benzophenone derivative, substituted acrylonitrile type, salicylic acid type, nickel complex salt, and hindered amine type are preferably used.

The above benzotriazole ultraviolet absorber contains 2 (2°
-hydroxy-5-methylphenyl)benzotriazole, 2(2'-hydroxy-5゜5゛-t-butylphenyl)benzotriazole, alkylated hydroxybenzotriazole, and the like.

Examples of benzophenone derivative ultraviolet absorbers include 2-hydroxy-4-methoxybenzophenone, 2°4-dihydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 4-dobutyloxy-2-hydroxybenzophenone.

Examples of acrylonitrile-based ultraviolet absorbers include 2-ethyl-hexyl-2-cyano-3,3°-diphenylacrylate and ethyl-2-soano-3°3'-diphenylacrylate.

Examples of salicylic acid-based ultraviolet absorbers include phenyl salicylate, pt-butylphenyl salicylate, p-octylphenyl salicylate, and the like.

Nickel complex salt ultraviolet absorbers include nickel-bis-octylphenyl sulfide and [2°2°-thio-bis-(4-t-octylphenolate)]-]〇-butylamine nickel.

Hindered amine light stabilizers include [bis(2,2,6
, 6-tetramethyl-4-piperidyl) sebacate] and the like.

Among these light stabilizers, hindered amine light stabilizers are most preferred.

The amount of the light stabilizer varies depending on the use, environment, purpose, etc. of the woven fabric/nonwoven fabric, and it is sufficient to include an effective amount.
- for the second or third thermoplastic resin in the shell, three
00PPM or more, preferably 300-10. OOOPP
It is desirable to contain it within the range of M.

If the above-mentioned amount is less than 300 PPM, the light resistance life may be short or the effect may not be exhibited. Also 10. O
If the OOPPM is exceeded, the light resistance life will be longer, but the cost will increase, which is not desirable.

Further, in the present invention, other additives such as light shielding agents, ultraviolet shielding agents, pigments, dyes, etc. may be used in combination. By using the above-mentioned light stabilizer or light stabilizer together with a phenol-based, phosphorus-based, sulfur-based, etc. antioxidant, the effect of preventing the effect of promoting photodeterioration of the surface layer caused by the light-shielding agent, pigment, etc. is remarkable. It is desirable to use them together because they produce a synergistic effect on weather resistance.

The above-mentioned phenolic antioxidant is a hindered phenol compound, specifically, 2.2' methylene bis(4
-methyl-6-t-butylphenol), 4.4°-butylidenebis(3-methyl-6-t-butylphenol), 4.4°-thiobis(3-methyl-5-t-butylphenol), tetrakis[methylene 3 - (4'
-Hydroxy-3',5'-di-t-butylphenyl)propionate comethane, n-octadecyl 3-
(4°-hydroxy-3',5°-di-butylphenyl)propionate, 2,4-bisoctylthio-6
-(4°-hydroxy-3゛,5°-di-t-butylanilino)-1゜3.5-triazine, 1.3.5-tris(4゜-hydroxy-3゛,5°-di-t -butylbenzyl)-1,3,5-triazine-2,4,6(IH
,3H,5H)-trione, 1.3.5-tris(3°
-Hydroxy-2°,6°-dimethyl-4'-t-butylbenzyl)-1,3,5-triazine-2,4,6(
IH,3H,5H)-)ion, 1.3.5-trimethyl-2,4,6-tris(4'-hydroxy-3',5
Examples include di-t-butylbenzylbenzene.

Examples of phosphorus-based antioxidants include compounds such as phosphite, phosphite, and phosphophenanthrene. phenyl) phosphite,
Tris(2,4-di-t-butylphenyl) phosphite, 9.10-dihydro-9-oxa-10-phosphfugphenanthrene-10-oxide, tetrakis(2,4-di-t-butyl phenyl) 4.4°-biphenylene diphosphonite, and the like.

Examples of the sulfur-based antioxidant of the present invention include compounds such as thiol and sulfite.
Thiodipropionic acid, didodecyl 3.3°-thiopropionate, dioctadecyl 3.3°-thiopropionate, pentaerythryl tetrakis (3-dodecylthiopropionate), pentaerythrityl tetrakis (3-dodecyl thiopropionate) -octadecylthiopropionate> and the like.

The blending ratio of these antioxidants is about 300 to 5,000 PPM with respect to the second or third thermoplastic resin.

If the blending amount is less than 300 PPM, the blending effect will be poor, the resin will deteriorate, and a synergistic effect as a light stabilizer cannot be expected. Also, 5. Even if the amount exceeds OOOPPM, no further improvement in effect will be achieved, and it will be economical as well. Not only is this negative, but it is also undesirable because it may impede mechanical properties.

A typical example of a light shielding agent is aluminum powder. Although aluminum powder-added films reflect light and are effective in protecting and growing crops, it is generally known that they have the effect of accelerating photodeterioration of resins. The present invention exhibits even more remarkable effects when used in combination with such a light shielding agent.

The antioxidant or ultraviolet shielding agent can be used alone or in combination of two or more.

In particular, it is preferable to combine a phenolic antioxidant and a phosphorus antioxidant because the effect is dramatically improved.

In the present invention, when the base layer is made of a highly crystalline thermoplastic resin and the surface layer has a multilayer structure of a low crystalline thermoplastic resin, the stretching effect of the highly crystalline thermoplastic resin of the base layer is reduced. Since heat fusion can be carried out without any oxidation, not only can woven and non-woven fabrics with strong mechanical strength be produced, there is no need to recover solvents compared to conventional paints, and the process is simple and can be manufactured continuously. It has advantages such as:

The method for producing a weather-resistant woven fabric/nonwoven fabric according to the second aspect of the present invention includes a first thermoplastic resin, and one side of the first thermoplastic resin layer having a melting point lower than that of the first thermoplastic resin, and A multilayer film formed by extrusion molding a second and/or third thermoplastic resin containing an effective amount of a light stabilizer is uniaxially oriented before and/or after cutting into a tape shape, and the orientation axis of the uniaxially oriented tape is woven or laminated at right angles or diagonally so as to intersect, the temperature is below the melting point of the first thermoplastic resin, and the second
Alternatively, there is a method for producing a weather-resistant woven fabric/non-woven fabric, which is characterized by heat-setting at a temperature higher than the melting point of the third thermoplastic resin.

Specifically, a first thermoplastic resin and a second or third thermoplastic resin that has a lower melting point than the first thermoplastic resin and has been blended with at least a light stabilizer in advance are mixed using a multilayer inflation method or a multilayer T-die method. This is a method for producing a film having at least a two-layer structure formed by an extrusion molding method such as the above.

In the present invention, before orienting the extruded film, it is cut into tape shapes with a width of 3 to 50 mm, preferably 5 to 30 mm, and uniaxially oriented by rolling and/or stretching in the longitudinal direction, or uniaxially oriented by rolling and/or stretching in the longitudinal direction. After orientation, it may be cut into tape shapes.

The above-mentioned orientation magnification (stretching magnification) is 1.1 to 15 times, but it is preferable to orient in multiple stages in order to prevent uneven stretching.

For example, in the first stage, 1.1 to 8 times, preferably 5 to 7 times
Next, the stretching magnification is 5 to 15 times in the second and subsequent stages.
Preferably, it is 6 to 10 times more oriented secondary or tertiary.

The orientation method in this case may be either a rolling method or a stretching method, but among the stretching methods, a quasi-uniaxial stretching method is particularly preferred.

The above rolling method involves passing a thermoplastic resin film between two heated rolls with a gap smaller than the thickness of the thermoplastic resin film.
This is a method of compressing the resin film at a temperature lower than its melting point (softening point) and elongating the resin film by the amount that reduces its thickness.

In addition, the quasi-uniaxial stretching method involves passing a thermoplastic resin film between low-speed rolls and high-speed rolls (close rolls) with the roll gap as small as possible, and stretching the film in the width direction while minimizing shrinkage. In the present invention, quasi-uniaxial stretching refers to an unstretched film W, a uniaxially stretched film W, and a stretching ratio V, where X in the following formula is an index of the uniaxiality of the stretching. The case where the value of X is ≧0.3 is referred to as pseudo-uniaxial stretching.

The uniaxially oriented tape thus obtained is woven or laminated at right angles or diagonally so that the light distribution axes intersect, The weather-resistant woven fabric/nonwoven fabric of the present invention is obtained by heat setting at a temperature higher than the melting point of the resin.

As the above-mentioned heat-setting method, a method of continuously heat-setting a woven fabric or a laminated sheet wound around a heating cylinder drum is preferable.

The present invention includes the following embodiments.

(1) The weather-resistant woven fabric/nonwoven fabric according to claim (1) or (2), wherein the amount of the light stabilizer is 300 PPM or more.

(2) Claim characterized in that the second and/or third thermoplastic resin layer of the multilayer tape also contains a light shielding agent (
The weather-resistant woven fabric/nonwoven fabric described in 1) or (2).

(3) The weather-resistant woven fabric/nonwoven fabric according to claim (1) or (2), which is uniaxially oriented or has an elongation magnification of 1.1 to 15 times.

(4) The first thermoplastic resin and the second and/or
The weather-resistant woven fabric/nonwoven fabric according to claim 1 or 2, wherein the weather-resistant woven fabric/nonwoven fabric has a melting point difference of at least 5° C. or more with the third thermoplastic resin.

(5) The thickness of the second and/or third thermoplastic resin layer of the multilayer tape is 50% or less of the first thermoplastic resin layer,
The weather-resistant woven fabric/nonwoven fabric according to claim 1 or 2, wherein the weather-resistant woven fabric/nonwoven fabric has a diameter of 5 μm or more.

(6) The first thermoplastic resin is at least one selected from linear low density polyethylene, medium/high density polyethylene, polypropylene, polybutene-1, poly-4-methyl-pentene-1, and the second or': The thermoplastic resin of fIJ3 is high-pressure polyethylene, ethylene-vinyl acetate copolymer, low-density ethylene-α-olefin copolymer, propylene-α-olefin copolymer, or ethylene-unsaturated carboxylic acid copolymer. Claims characterized in that at least one selected from
The weather-resistant woven fabric/nonwoven fabric described in 1) or (2).

(7) Production of the weather-resistant woven fabric/nonwoven fabric according to claim (3), wherein the uniaxially oriented tape is uniaxially oriented at a stretching ratio of 1.1 to 15 times by rolling and/or stretching. Method.

(8) Claim (3) characterized in that the uniaxial orientation satisfies at least X=≧0.3 by quasi-uniaxial stretching of the following formula.
) The method for producing weather-resistant woven fabrics and non-woven fabrics.

(However, the unstretched film W°, the uniaxially stretched film W, and the stretching ratios V and X are indices of the uniaxiality of stretching.) [Examples] The present invention will be described in more detail below with reference to Examples.

Example 1 (Resin used) First thermoplastic resin: High density polyethylene [MFR=1
．． og, /i 0min.

d=0.956 g/am3, melting point 129°C, trade name Futomegata Stafrene E710, manufactured by Shiraishi Jushi Kagaku Co., Ltd.] Second or third thermoplastic resin: low density polyethylene [VFR=3.0 g710 min.

d=0.924g/cm3. Melting point: 109°C, trade name: Nimokushi Xuron F30° (manufactured by Mega Kagaku Co., Ltd.) (manufacturing example) The above-mentioned high-density polyethylene is used as an inner layer using the multilayer water-cooled inflation method, and a hindered amine light stabilizer is added as a light stabilizer on both sides of the inner layer. (Product name: KimaSorb 944LD
(manufactured by Ciba Geigy) 1, OOOPPM, calcium stearate 0.2% by weight, a mixture of antioxidants (trade name: Nirganox 1010 = 2 parts, trade name: Irga hose 168 = 1 part, manufactured by Ciba Geigy) 0.09% by weight. The above blended low density polyethylene is arranged, and the thickness ratio is LD.
15μm/HD 100μm/LD15μm 1 width 1m
A multilayer film having a three-layer structure was produced.

While running the multilayer film, it was passed through a hot bath at 90 to 95°C, and was first stretched to a stretching ratio of 6 times using a hot plate method, and then secondarily stretched to a stretching ratio of 8 times using a quasi-uniaxial stretching method using hot air at 100°C. was cut into a tape shape with a width of 5 mm to obtain a uniaxially stretched tape.

(Thickness ratio L D 5 μm / HD 35 μm /
(L D 5 μm) Next, this was further laminated in warp and warp directions, heat-sealed at an adhesion temperature of 120°C to produce a nonwoven fabric, and a weather resistance test was conducted. The results of measuring the adhesive strength, tensile strength, and elongation at that time were 1
Shown in the table.

Example 2 The light stabilizer in Example 1 was changed to 3. A weather-resistant nonwoven fabric was produced in the same manner as in Example 1 except that OOOPPM was used, and the evaluation results are shown in Table 1.

Example 3 The light stabilizer in Example 1 was changed to 5. A weather-resistant nonwoven fabric was produced in the same manner as in Example 1 except that OOOPPM was used, and the evaluation results are shown in Table 1.

Example 4 40% by weight of low density polyethylene and aluminum powder (average particle size 4 to 5 μm) were added to the low density polyethylene of Example 2.
A nonwoven fabric was produced in the same manner as in Example 2 by blending 5% by weight of a masterbatch having a composition of 37.5% by weight and 22.5% by weight of a dispersant, and the results of evaluation are shown in Table 1.

Example 5 In addition to the low density polyethylene of Example 3, 40% by weight of low density polyethylene and aluminum powder (average particle size 4 to 5
Example 3
Nonwoven fabrics were manufactured in the same manner as above, and the results of evaluation are shown in Table 1.

Example 6 Multilayer tape of Example 3 (lightfast agent s, oo.

A woven fabric woven using a Sluzer loom (containing PPM) was subjected to a weather resistance test, and the results were evaluated after 900 hours of exposure, and the results were as follows.

Adhesive strength 8.3 g Tensile strength 22 g 75 cm Elongation
16% Comparative Example 1 A nonwoven fabric was produced in the same manner as in Example 1 by adding 0.2% by weight of calcium stearate and 0.09% by weight of an antioxidant without adding a light stabilizer to the low-density polyethylene of Example 1. The evaluation results are shown in Table 1.

Comparative Example 2 A weather-resistant nonwoven fabric was produced in the same manner as in Example 1 except that the light stabilizer in Example 1 was changed to 200 PPM, and the results of evaluation are shown in Table 1.

Comparative Example 3 40% by weight of low density polyethylene and aluminum powder (average particle size 4 to 5 μm) were added to the low density polyethylene of Comparative Example 1.
Table 1 shows the results of blending 5% by weight of a master batch consisting of 37.5% by weight and 22.5% by weight of dispersant and evaluating in the same manner as in Comparative Example 1.

The test method is as follows.

1) Weather resistance test (weather-0-meter) conditions JIS
B 7753-1977 (however, the spray time is 12 minutes out of 60 minutes).

2) Adhesive strength (g) Using Tensilon, test piece (200 mm long x 150 m wide)
A U-shaped device connected to the load cell of Tensilon is hooked from the top to the center of m), and the bottom of the test piece is fixed to Tensilon. and tensile speed 500mm/min,
It was expressed as the average value of the load indication values when the mesh of the tensile test piece was loosened at a chart speed of 50 mm/min.

3) Tensile strength (K g / 5 cm) and elongation (%) Tested using a low-speed tension type tensile tester (Shopper type) and setting the interval between the upper and lower parts of the grip of the tester to 100 mm. Both ends of a piece (length 200 mm x width 50 mm) were fixed and pulled at a pulling speed of 200 mm/min, and the load and elongation when the test piece was cut were measured.

(Effects of the Invention) As described above, the weather-resistant woven fabric/nonwoven fabric of the present invention consists of at least two layers of extrusion-molded film ~ a logistics material such as a container that contains a light-resistant agent only in the surface layer of an axially oriented tape. It is suitable for outdoor use.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of an embodiment of the nonwoven fabric of the invention, and FIG. 2 shows an embodiment of the woven fabric of the invention. A, A': first thermoplastic resin, B, B': second thermoplastic resin, c, c': third thermoplastic resin.

Claims (3)

[Claims] (1) A first thermoplastic resin layer, and a second or third layer having a melting point lower than that of the first thermoplastic resin and containing an effective amount of a light stabilizer on at least one side of the first thermoplastic resin layer. A weather-resistant fabric characterized in that a uniaxially oriented multilayer tape formed with a thermoplastic resin layer is woven or laminated at right angles or diagonally so that the orientation axes thereof intersect, and then heat-set. Cloth/non-woven fabric. (2) The multilayer tape has a three-layer structure in which a second thermoplastic resin layer and a third thermoplastic resin layer are formed on both sides of a first thermoplastic resin layer, and the second and/or third The weather-resistant woven fabric/nonwoven fabric according to claim 1, wherein the thermoplastic resin layer contains a light-resistant agent. (3) a first thermoplastic resin; a second and/or third thermoplastic resin having a melting point lower than that of the first thermoplastic resin and containing an effective amount of a light stabilizer on at least one side of the first thermoplastic resin; Before and/or after cutting a multilayer film formed by extrusion molding a thermoplastic resin into a tape shape, uniaxially orienting it,
Woven or laminated in a right angle or diagonal direction so that the orientation axes of the uniaxially oriented tape intersect, and heat-fixed at a temperature below the melting point of the first thermoplastic resin and above the melting point of the second or third thermoplastic resin. A method for producing weather-resistant woven fabrics and non-woven fabrics.