KR100404695B1 - Fiberglass Nonwovens - Google Patents

Abstract

(purpose)

It is an object of the present invention to provide a glass fiber which is excellent in alkali resistance and acid resistance while using inexpensive E glass fiber and excellent in dispersibility in wet nonwoven fabrics.

(Configuration)

The glass fiber of the present invention is characterized by being coated with an epoxy resin, a curing agent of epoxy resin, a silane capping agent containing epoxy silane, an ethylene oxide adduct of bisphenol A or a nonionic surfactant of polyethylene glycol fatty acid ester. It is done.

Description

Fiberglass nonwoven fabric

(Industrial use)

The present invention relates to a glass fiber nonwoven fabric, and more particularly, to a glass fiber nonwoven fabric produced by a wet nonwoven fabric weaving method after cutting a glass fiber to a predetermined length.

(Conventional technology)

The glass fibers are taken out of the molten glass from a plurality of nozzles installed at the bottom of the platinum bushing, and then coated with a focusing agent through an applicator called an applicator. It manufactures by making.

In addition, the glass fiber nonwoven fabric is produced by the dry nonwoven fabric wetting method or the wet nonwoven fabric wetting method after cutting the glass fiber bundle into a predetermined length and making it into a glass chopped strand.

The wet nonwoven fabric wetting method is a method of dispersing glass chopped strands in an aqueous dispersion, and wetting (floating). To obtain a glass fiber nonwoven fabric having a uniform thickness by this method, the glass chopped strands are used in an aqueous dispersion. It is necessary to disperse | distribute uniformly in the state near to a glass short fiber (monofilament).

By the way, the fiberglass binding agent is required to reduce the original spinning, damage of the glass fiber in the processing process, improve the workability during processing and use, and improve the adhesion between the glass fiber and the resin. However, the glass fibers used in the wet nonwoven fabric weaving method are also required to loosen the glass chopped strands during dispersion and to disperse them in a monofilament or to prevent the dispersed glass fibers from agglomerating. As the focusing agent, a focusing agent comprising a water-soluble polymer such as starch, acrylamide-vinyl acetate copolymer, carboxymethyl cellulose, polyvinyl alcohol, polyethylene oxide, and a lubricant such as cationic fatty acid amide is used.

(Tasks to be solved by the invention)

Although glass fiber nonwoven fabric is used for various uses, there exists a base material of a superposition material as one. This material is formed into a sheet shape by impregnating a glass fiber nonwoven fabric with a vinyl chloride resin.

Moreover, there exists a description of a board | plate material as another use of a glass fiber nonwoven fabric. This sheet is formed by impregnating a glass fiber nonwoven fabric with a phenol resin containing an organic acid such as paratoluene sulfonic acid as a curing medium, followed by thermosetting and foam molding into a plate shape.

Usually, inexpensive E glass fiber is used as a glass fiber for these uses.

However, there is a problem that the above-mentioned material and the plate are easily eroded from the glass fiber by the alkali powder and the acid powder, the dimensional stability cannot be maintained, or the molded article of high strength is hard to be obtained.

For example, when the upper layer is affixed on the concrete floor of a building, the glass fiber nonwoven fabric may be eroded by alkali particles eluted from the concrete, and the dimensional stability of the upper layer may be impaired. As a result, the strength after shaping | molding may fall significantly.

Erosion of glass fiber nonwoven fabric by alkali or acid powder can be prevented by using AR glass fiber or C glass fiber which has excellent alkali resistance and acid resistance instead of E glass fiber, but these glass fiber can be used for glass fiber nonwoven fabric. It is disadvantageous in terms of cost because it cannot satisfy the basic characteristics of or because of high material cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a glass fiber nonwoven fabric having excellent chemical resistance such as alkali resistance and acid resistance while using inexpensive E glass fiber and excellent dispersibility of glass fiber in wet nonwoven fabrics. The purpose.

(Means to solve the task)

MEANS TO SOLVE THE PROBLEM The present inventors performed various experiments in order to achieve the said objective, As a result, the focusing which makes it possible to form the chemical-resistant film on the E glass fiber surface, and also to improve the dispersibility of the glass chopped strand at the time of wet nonwoven fabric wetting. The discovery has led to the proposal of the present invention.

That is, the glass fiber nonwoven fabric of the present invention contains an epoxy resin, a curing agent of an epoxy resin, a silane capping agent containing an epoxy silane, and a nonionic surfactant, wherein the nonionic surfactant is an ethylene oxide adduct of bisphenol A. Or a cut of a glass fiber coated with a binding agent which is a polyethylene glycol fatty acid ester.

In the glass fiber nonwoven fabric of the present invention, the binding agent is represented by solid content, and 0.5 to 5.0% by weight of epoxy resin, 0.01 to 5.0% by weight of curing agent, 0.05 to 0.5% by weight of silane capping agent, and 0.5 to 5.0% by weight of nonionic surfactant. It is made by using, and it is characterized by using a cut of the glass fiber attached so that the loss on ignition is 0.1 to 1.0% by weight.

(Action)

The epoxy resin contained in the binding agent in the present invention is a material having excellent chemical resistance, and when it reacts with the curing agent to cure, a chemical resistant film is formed on the glass fiber surface. However, when this epoxy resin content becomes less than 0.5 weight% by solid content display, the said effect will become small, and when it exceeds 5.0 weight%, glass chopped strand dispersibility at the time of wet nonwoven fabric will worsen.

Therefore, the epoxy resin may be an emulsified epoxy resin produced industrially, such as a bisphenol A type or polyfunctional epoxy resin containing a glycidyl group.

In addition, a hydrophilic group may be introduced and hydrated in various ways.

The glass fiber of this kind is heated before or after cutting, but the curing agent of the epoxy resin is a material having a function of curing the epoxy resin by heating.

Especially, considering the adhesiveness between the epoxy resin film and the glass fiber, amino silane is suitable. However, when the content is less than 0.01% by weight, the curing effect of the epoxy resin decreases. The dispersibility of the glass chopped strands is deteriorated.

The capping agent containing an epoxy silane is a material which improves the wettability of the binding agent to the glass fiber and makes the binding agent uniformly coated on the glass fiber surface.

However, when this capping agent becomes less than 0.05 weight%, the said effect | action becomes small, and when it exceeds 0.5 weight%, the dispersibility of the glass chopped strand at the time of annealing will deteriorate.

Moreover, the nonionic surfactant of the ethylene oxide adduct of bisphenol A and the polymethylene glycol fatty acid ester is a material which makes it easy to disperse a glass chopped strand.

However, when this noionic surfactant becomes less than 0.5 weight%, the said effect | action becomes small, and when it exceeds 5.0 weight%, workability in a processing process will deteriorate.

In the present invention, in addition to the above materials, it is possible to contain other materials to the extent that the properties of the binding agent are not impaired, and for example, cationic fatty acid amides and the like may be included for the purpose of improving radioactivity.

In the present invention, the adhesion amount of the glass fiber binding agent is preferably 0.1 to 1.0% by weight loss.

That is, less than 0.1% by weight of the coating on the surface of the glass fiber is insufficient, it is not possible to give sufficient chemical resistance to the glass fiber nonwoven fabric, while more than 1.0% by weight dispersibility of the glass chopped strand at the time of wet nonwoven fabric This gets worse.

Example

Hereinafter, the glass fiber nonwoven fabric of this invention is demonstrated in detail based on an Example.

Example 1

First, a polyethylene glycol polypropylene glycol was introduced using a hydroxyl group of a side chain of a bisphenol A epoxy resin to make it water-soluble, 1.5% by weight of an epoxy resin having a molecular weight of 1200 and an epoxy equivalent of 600, and an aminosilane (A1100: Nihon Unika Co., Ltd.). Shiki Kaisha) 0.2 weight%, Epoxysilane (A187: Nippon Chemical Co., Ltd. make) 0.05 weight%, 1.0 weight% of nonionic surfactants of 30 mol equivalents of ethylene oxide of bisphenol A, and cationic fatty acid amide 0.05 A binding agent in weight percent was prepared.

This bundling agent was applied to E glass fiber (diameter 10 micrometers), adjusted so that the loss in ignition might be 0.3% by weight, and after binding them to 1600 pieces, they were cut into 13 mm lengths while heating to 130 ° C for 10 hours.

Example 2

First, 1.0 weight% of an epoxy resin emulsified using a nonylphenol ethylene oxide adduct, a propylene oxide ethylene oxide copolymer and a water-soluble phenol novolak type epoxy resin having a molecular weight of 600 and an epoxy equivalent of 160, and aminosilane (A1100: Nihon Unika). 0.2% by weight of Co., Ltd.), 0.05% by weight of epoxy silane (A187: manufactured by Nihon Unika Co., Ltd.), 1.2% by weight of nonionic surfactant of distearic acid ester of polyethylene glycol having a molecular weight of 2000, and cationic fatty acid A binding agent was prepared which was 0.05% by weight of amide.

This binding agent was applied to the same glass fiber as in Example 1 so as to reduce the loss of ignition to 0.3% by weight, and after binding them to 1600 pieces, the coils were wound up and heated at 130 ° C. for 10 hours to cut a length of 13 mm.

Comparative example

In the binding agent of Example 1, a binding agent except for a nonionic surfactant was prepared, and this was adjusted and applied so as to reduce the loss of ignition to 0.3% by weight with respect to the same glass fiber as in Example 1, and after binding by binding 1600 pieces It heated at 130 degreeC for 10 hours, and cut | disconnected 13 mm in length.

(Conventional example)

A concentration of 0.2% by weight of polyethylene oxide and 0.1% by weight of cationic fatty acid amide was prepared, and this was adjusted and applied so that the loss of ignition was 0.1% by weight with respect to the same glass fiber as in Example 1, and they were 1600 pieces. After winding up, it was heated at 130 ° C. for 10 hours and cut into 13 mm lengths.

The dispersibility when the glass fiber strands were prepared and the glass fiber nonwoven fabric thus obtained were immersed in an alkaline solution or an acid solution, and the tensile strength thereof was investigated.

Table 1

As is clear from the table, all of the glass chopped strands of Examples 1 and 2 had good dispersibility, and the glass fiber nonwoven fabric produced from them had a high tensile strength after immersion in an alkaline solution and an acid solution.

On the other hand, the glass chopped strand of the comparative example was poor in dispersibility, and the glass fiber nonwoven fabric made from the glass chopped strand of the conventional example had low tensile strength after immersion in the alkaline solution and the acid solution.

In addition, the dispersibility was evaluated by putting a predetermined amount of chopped strand into the aqueous dispersion (white water), stirring it for a predetermined time, and immediately irritating, and then visually observing the presence or absence of the undispersed chopped strand. The thing which made a thing good was made and what existed at least was made into defect.

In addition, the tensile strength after immersion in an alkaline solution or an acid solution is first produced by hand by fabricating a glass fiber nonwoven fabric having a weight of 50 g / m 2 cured to 20% by weight of the commonly used acrylic emulsion zone, and cutting it to a size of 5 × 20 cm. After the test piece was obtained, a plurality of the test pieces were prepared and immersed in a 3% sodium hydroxide aqueous solution which is an alkaline solution for 10 hours, 3 hours in a 3% hydrochloric acid solution which is an acid solution, and then immersed in an aqueous 20% paratoluene sulfonic acid solution for 3 hours, and then tensioned. It measured by the tester, The higher these values, the more excellent chemical-resistance is.

As described above, the glass fiber nonwoven fabric of the present invention has a chemical-resistant coating formed on the surface thereof, and also has excellent dispersibility of the glass fiber in the case of wet nonwoven fabric, so that the glass fiber nonwoven fabric is used as the base material of the upper material. When the base material which is excellent in dimensional stability is obtained and it is set as the base material of the board | plate material using a phenol resin, a phenol resin can fully be hardened and the molded object which has high strength can be obtained.

Claims (2)

Epoxy resin, curing agent of epoxy resin, silane capping agent containing epoxy silane, and a nonionic surfactant, wherein the nonionic surfactant is coated with a ethylene oxide adduct of bisphenol A or a polyethylene glycol fatty acid ester. A glass fiber nonwoven fabric, comprising the use of a cut piece of glass fiber. The solidifying agent according to claim 1, wherein the binding agent comprises 0.5 to 5.0% by weight of epoxy resin, 0.01 to 5.0% by weight of curing agent, 0.05 to 0.5% by weight of silane capping agent, and 0.5 to 5.0% by weight of nonionic surfactant. The glass fiber nonwoven fabric which uses the cut | disconnected glass fiber attached so that a loss of heat may be 0.1-1.0 weight%.