JP2000119961A - Flame-retarded resin composition for covering glass fiber yarn, and its product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition hardly generating a corrosive or harmful gas at the time of burning, excellent in strength and flexibility, and useful for an insect-proofing net or the like by using a polyethylene resin or the like, an ethylene-vinyl acetate copolymer resin, and ammonium polyphosphate or the like as essential ingredients. SOLUTION: This flame retarded resin composition dispersed in water, for coating a glass fiber yarn consists of a polyethylene resin or a polypropylene resin (a mixture thereof) preferably in the proportion of 40-90 wt.%, an ethylene- vinyl acetate copolymer resin preferably in the proportion of 20-55 wt.%, a (melamine-modified) ammonium polyphosphate (mixture) preferably in the proportion of 10-60 wt.%, and one or more kinds of triazine derivatives of a nitrogen- containing compound, a cyclic thioketone comprising a >=5-membered heterocycle containing two or more nitrogen atoms in the ring, or a reaction products of a cyclic ketone with formaldehyde, and (methylol)melamine, preferably in the proportion of 5-30 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass fiber yarn coated with a flame-retardant resin containing no halogen compound and used for a roll screen, an insect screen and the like.

[0002]

2. Description of the Related Art Heretofore, flame-retardant glass fiber yarn has been used as a resin coating agent because a vinyl chloride resin is used as a plasticizer because of its good flame retardancy, weather resistance, flexibility, weaving properties and low cost. A method in which various components such as a flame retardant and a pigment are blended into a material dispersed therein, and the dispersed material is used as a coating material, impregnated in a glass fiber yarn, applied, and dried by heating. Extruded around and coated.

[0003]

However, in recent years, when a vinyl chloride product or a resin molded product flame-retarded by a flame retardant containing a halogen-based element is discarded and incinerated, hydrogen chloride, chlorine gas, There is a problem that the environment is polluted by dioxin or the like or halogen-based iodine contained in the flame retardant, and development of such a flame-retardant resin coating which does not cause such pollution has been desired.
However, in a method of producing a coated yarn in which a coating liquid in which a resin composition is dispersed is applied to the yarn and heated and dried, it is necessary to incorporate a large amount of a non-halogen flame retardant into a resin other than the vinyl chloride resin. Became hard and there was a problem in the flexibility or weavability of the coated yarn. The polyethylene resin and the polypropylene resin studied by the present inventors also include ammonium polyphosphate and a nitrogen-containing compound which are usually blended as a non-halogen flame retardant, magnesium hydroxide, talc and calcium carbonate for reducing combustion calories. By simply blending these, it was not possible to obtain a coating resin having a durable and flexible coating and good weaving properties.

[0004]

Means for Solving the Problems The present inventors have proposed the use of a polyethylene resin and / or a polypropylene resin and the use of a flame retardant containing no halogen element.
Attempts were made to develop a coating material with a flexible coating and good weaving properties, and as a result of various studies, it was found that ammonium polyphosphate and a nitrogen-containing compound were used as flame retardants and a specific ethylene-vinyl acetate copolymer was blended. This solves these problems.

[0005] The compounding ratio of these components is polyethylene resin (hereinafter referred to as PE) or polypropylene resin (hereinafter referred to as P).
P) or a mixture of a mixture thereof and an ethylene-vinyl acetate copolymer resin (hereinafter, referred to as EVA) accounts for 30 to 90% by weight, preferably 40 to 90% by weight, based on the total amount of the dried coating resin. %. 90% by weight
Above. Flame retardancy is reduced, and if it is 30% by weight or less, coating properties on glass fibers are reduced. Regarding the blending ratio between EVA and either PE or PP or a mixture thereof, the amount of EVA in the mixture is 10 to 70% by weight, preferably 20 to 55% by weight. If it is less than 10% by weight, the coatability to glass fibers will be reduced, and if it is more than 70% by weight, the workability such as the weaving property of the coated yarn will be reduced due to the tackiness of EVA. The mixing ratio of PE and PP is not particularly limited, and the ratio is adjusted according to the purpose, such as adjustment of yarn quality such as softness of the coated glass fiber yarn and adjustment of heat resistance.

The amount of ammonium polyphosphate or melamine-modified ammonium polyphosphate is 10-60% by weight based on the dry coating resin.
Flame retardancy decreases, and if it exceeds 60% by weight, coatability to glass fibers decreases. The compounding amount of the nitrogen-containing compound is 5 to 30% by weight with respect to the dry coating resin. If it is less than 5% by weight, the flame retardancy is reduced. Little improvement. In addition to the above components, a dispersant for preparing a coating liquid, a thickener for adjusting viscosity,
The pigment is added, but is selected from known ones according to the components such as the resin to be blended. In addition, it is also possible to add an inorganic compound powder such as charcoal, aluminum hydroxide, magnesium hydroxide and zinc borate as a filler or a flame retardant auxiliary.

[0007] PE used in the present invention is a high pressure method, a medium pressure method,
It is manufactured by a low pressure method or the like, and any of a low molecular weight type having a molecular weight of 2-30,000 to a 200,000 to 300,000 high molecular weight type or a cross-linked type can be used. Is preferably used. PP
Is a propylene homopolymer, propylene as a main component, ethylene, 1-butene, 1-pentene, 1-hexene,
A random copolymer or a block copolymer containing at least one of 4-methyl-1-pentene, 1-heptene, 1-octene and 1-decene as a subcomponent, or a mixture of two or more of these polymers, and the like. Is mentioned. The PE,
PP processed into a powder without any change in basic physical properties is used. The particles having a particle size of 100 μm or less are preferably used, and those having a particle size of 50 μm or less are preferably used. If the particle size exceeds 100 μm, it is difficult to stably disperse the particles in a liquid, and the coatability is deteriorated.

As EVA, ethylene copolymerization ratio is 5
Use 0-90% by weight. When the copolymerization ratio is 90
If the amount exceeds 50% by weight, the coating film after drying becomes hard and the processability of the coated yarn becomes low. If the amount is less than 50% by weight, the coatability to the glass fiber yarn deteriorates. The form used is
Powders having the same particle size as PE or PP or those emulsified by emulsion polymerization may be used, but those emulsified are desirable in view of coatability to glass fiber yarns.

As the flame retardant ammonium polyphosphate and melamine-modified ammonium polyphosphate, commercially available powdered products may be used as they are, and those having improved water resistance by covering the surface of ammonium polyphosphate particles with a protective film. It is more effective if used.

The nitrogen-containing compounds include ethylene urea, ethylene thiourea, hexahydropyrimidin-2-one,
Examples thereof include piperazine-3,6-dione, barbituric acid and reaction products of these with aldehydes, nitrogen-containing heterocyclic organic compounds such as oligomers or polymers of 2-piperazinylene-4-morpholino 1,3,5-triazine, and melamine. Among them, a reaction compound of ethylene urea or ethylene thiourea with formaldehyde, or 1,3,5 triazine derivative 2
Oligomers or polymers of piperazinylene-4-morpholino 1,3,5-triazine are preferably used.

Inorganic compounds such as charcoal, aluminum hydroxide, magnesium hydroxide, and zinc borate are appropriately blended as a flame-retardant aid or as a filler as long as the particle size does not easily cause separation and precipitation in the coating solution. I can do it. Furthermore, usually P
Known additives incorporated into E and PP, for example, antioxidants, lubricants, metal stearate, and the like are also used as necessary.

As the yarn used in the present invention, glass fibers having a composition such as E glass, S glass, C glass, and T glass are usually used, but other fibers may be used as long as the yarn is in the form of yarn. Glass fiber yarn has a twist of 13
Twist / 25 mm or less, or completely non-woven, fiber diameter is 3-23 μm, yarn thickness is 10-450 g / 10
00 m, preferably 20-100 g / m.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a method for producing a flame-retardant resin-coated glass fiber yarn using these materials is as follows. The coating component and water to be blended are weighed, and the coating component is stirred and dispersed in water by a homomixer, a dispersion mill, or the like to prepare a coating liquid. After immersing the glass fiber yarn in the coating liquid, excess coating liquid is removed using a die or the like. The yarn coated with a predetermined amount of the coating liquid is dried and heated by a hot air drier or a far-infrared heater or the like to produce a flame-retardant resin-coated glass fiber yarn. The yarn is used to weave, and the roll screen and the insect net are woven. Since it is coated with a thermoplastic resin, the texture can be heat-sealed to produce a product without misalignment.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below using embodiments. <Example 1> EVA resin 28% by weight Polyethylene resin 42% by weight Ammonium polyphosphate 19.5% by weight Melamine resin 5% by weight Dispersant 1% by weight Thickener 1% by weight Pigment (light gray) 3.5% by weight To prepare a coating solution having a concentration of 50% by weight. To this coating liquid was added glass fiber yarn (ECG100 1/0 1.
After immersing and coating 0Z-count (49Tex), an excess coating liquid was removed using a predetermined die. In addition, 160 ° C
By drying for 5 minutes at a solid content of 44 g / 1
A flame retardant resin coated glass fiber yarn of 000 m was made. In order to evaluate the flame retardancy, a rapier weaving machine was used to make a woven fabric having a length of 42 yarns / 25 mm x a width of 42 yarns / 25 mm and a basis weight of 350 g / m2. The film was soft and there was no problem in weaving.

<Example 2> A woven fabric for evaluation of flame retardancy was obtained in the same manner as in Example 1 except that polypropylene resin powder was used instead of polyethylene resin powder. The film was soft and there was no problem in weaving.

<Comparative Example 1> As a product using a flame-retardant vinyl chloride resin-coated glass fiber yarn, a woven fabric for a roll screen (42 fresh / 25 mm × Horizontal 42 / 25m
The flame retardancy was evaluated using a Nanako weave of m and a basis weight of 430 g / m2).

Test method for flame retardancy A test was conducted according to JIS L1091 A-1 method.
As a result, all specimens were stipulated in Article 4-3 (JI
(Level conforming to Category 3 of SL1091).

[0018]

The glass fiber yarn is coated with the flame-retardant resin composition having the composition described in claim 1, so that the coating layer is flexible, strong, highly flame-retardant and woven. Good yarn. As a result, a product having flame retardancy equal to or superior to that of a fabric woven with a conventional flame-retardant PVC-coated yarn can be obtained. Furthermore, since a halogen-based flame retardant is not used as a flame retardant, there is an advantage that no corrosive or toxic gas is generated during combustion.

[0019]

[Table 1]

[0020]

[Table 2]

Claims (3)

[Claims] 1. A water-dispersed flame-retardant resin composition for coating a glass fiber yarn, comprising a polyethylene resin, a polypropylene resin or a mixture thereof, an ethylene-vinyl acetate copolymer resin, an ammonium polyphosphate, and a melamine-modified polyphosphate. Reactive substances of ammonium or a mixture thereof and a triazine derivative group which is a nitrogen-containing compound, a cyclic thioketone or a cyclic ketone composed of a 5- or more-membered heterocyclic ring containing two or more nitrogen atoms in the ring and formaldehyde A flame-retardant resin composition for coating glass fiber yarns, wherein a group, melamine, and at least one of methylolmelamine are essential components. 2. A glass fiber yarn coated with a flame-retardant resin, which is coated with the flame-retardant resin according to claim 1. 3. A flame-retardant resin-coated glass fiber fabric produced using the glass fiber bundle according to claim 2.