LV10795B - Process for finishing of fabrics from glass filaments - Google Patents

Abstract

This invention is related to the production of glass fibre fabric through high temperature resistance, in this case to the finishing of glass fibre fabric with vermiculite dispersion.In order to prevent the displacement of glass fibre fabric treads, make glass fibre fabric firmer and more airproof, provide that heat resistance of apret becomes similar to the heat resistance of glass fibre and increase the bond between apret and glass fibre fabric, it is suggested to use microlite vermiculite dispersion in the mixture of distilled water and acrylic latex for finishing, and the proportions of distilled water and acrylic latex (mass %) must be 80 : 29.4 : 0.6, respectively.<IMAGE>

Description

LV 10795

METHOD OF FITTING GLASS FIBERS

The invention relates to the production of glass fiber fabric with high temperature resistance, in this case the glass fiber fabric is dressed with a vermiculite dispersion.

Known fiberglass fabrics with a high silica content obtained from the alumina silicate glass (glass No. 11) in the process of desiccation (KA-11 - STj) and containing, by weight, 94-95% silicon dioxide, the temperature resistance of such fabrics for a long time using 1000 ° C.

Known methods for obtaining glass fiber fabrics do not provide high quality glass fabrics, the disadvantages of these fabrics are low friction resistance, instability against the displacement of certain fabric threads. These drawbacks make it difficult to use fiberglass fabric, for example, to prevent fabrics from being cut and sewed into various products, such as gloves, covers, aprons and the like.

Glass fiber fabrics are used to improve the quality of the fabrics with a variety of dressings. Known dressings contain organic compounds (SU aut. No. 1680654, 1989), which usually decompose at high temperatures.

The object of the invention is to prevent the glass fiber fabric from slipping away, to make the fiberglass fabric more rigid and 2 less air permeable, further treating it with a finishing composition, while ensuring that the shear temperature resistance is close to the temperature resistance of the glass fabric. The targets reach the glass fiber fabric by finishing the microlite vermiculite dispersion in distilled water. To enhance dressing attachment, acrylic latex is added to the dispersion. In addition, the ratio of microlite vermiculite dispersion, distilled water, and acrylate ratio (wt%) is 80: 29.4: 0.6, respectively.

The proposed composition of the dressing ensures that 3 - 4% of the fabric is applied to the glass fiber fabric. This is necessary and sufficient to ensure that glass fiber fabric fades away, to make the fiberglass fabrics more rigid and less air-permeable, and to maintain the temperature resistance of the finished fabric.

Microlite vermiculite dispersion dressing is obtained by chemically releasing vermiculite. Vermiculite is a naturally occurring magnesium-aluminum-silicon mineral. Due to chemical release, a large amount of vermiculite is suspended in water.

Vermiculite Chemical Formula: (Mg, Ca, Fe + 2) 3 (Si.AI.Fe'V (OH) 10 4H20

Typical chemical composition (% by weight):

SiO 2 43.4

MgO 18.5

Al203 9.3

Fe2 O3 + FeO 11.3 K20 5.3

CaO 1.7

TiO2 2.1

MnO 0.15 3 EN 10795

Cr203 0.25 Nap 0.12 Li02 - Other components + water 7.88

Microlite vermiculite dispersions are chemically inert and alkali resistant, less acid resistant.

The essence of the invention is illustrated by the following finishing method and technological scheme (see Fig. 1).

Preparation of microlite vermiculite (hereinafter vermiculite) dressing: add 0,6 kg of acrylic latex (make Emukril M) to 19,4 kg of distilled water and mix. The resulting solution is then added to 80 kg of vermiculite and mixed thoroughly.

The fiberglass fabric is finished in the finishing line (see Fig. 1). The rolls of the fabric to be dressed are placed in the rewinding line of the finishing line 1. The woven fabric from the weaving unit 1 is fed through the compensator 2 to the impregnation bath 3 with a vermiculite dressing. The impregnated fabric goes further through the adventures 4 to press the excess solution. The pressure in the calender cylinders is not more than 2 kg / cm2. The compensator 2 is designed for sewing the next fabric roll to the previous fabric roll and provides a continuous rhythm of work. The impregnated fabric is dried in a drying oven at 150-175 ° C. The nominal processing speed of the fabric is 4 - 5 m / min.

From the oven, the fabric of the oven 5 enters the compensator 6 and further into the winding node 7 where the rolls are rolled.

Press rollers 4 can be made of stainless steel or hard rubber (other metals can cause microlite vermiculite dispersion flocculation). The pressure rollers can have both pressure controls (pneumatic, spring or gravity or spacing).

The most suitable fabric drying oven is one in which the applied substrate is heated by circulating hot air. In this case, the temperature of the oven (chamber) is much more even than that of drying with electric radiators, which can easily cause the burning of the fabric 4. The drying temperature of 150 to 175 ° C is sufficient to dry the organic additives. Controls can be performed after smell, i. the completely dried vermiculite products are odorless or burning in the flame, without the appearance of smoke indicating that the fabric does not contain organic compounds.

Technical Characteristics of Finished Fiberglass Fabric 1. Determination of friction resistance

For glass vermiculite dispersion, fiberglass fabric KA-11-S8 / 3-W with nominal weight of 600 g / m2 is used. The treatment was carried out according to the scheme described above.

Standard test methods are used to determine friction resistance, such as the degree of wear or loss of weight after a certain number of cycles on a fiberglass fabric. The test specimens are added to the rotating platform by means of a clamp, lowered to the specimen and rubbed by a vacuum. Samples are rubbed for 100 cycles, then removed and weighed, then re-exposed to 100 cycles and weighed again. This process continues until the sample is skinny through. The results are summarized in Fig.2. The results show that the samples of vermiculite treated glass fiber fabric are not fully wearable after 1600 cycles. FIG. The curves shown in Figure 2 also show that less weight loss is observed in samples of vermiculite coated glass fiber fabric and that the destruction process lasts longer than the untreated samples. 2. Heat and flame out

Vermiculite-coated fiberglass fabric retains its temperature resistance and increased flame resistance, thanks to its reflection of heat, - protects the shape of the base fiber by reducing shrinkage, - helps to maintain the strength of strength while retaining the physical form by heating to 1093 ° C.

The above demonstrates that glass fiber fabrics treated with vermiculite dispersion retains the thermal insulation LV 10795 5 capability as well as providing a flame barrier at 1093 ° C. This is achieved by the fact that the vermiculite dispersion dressing forms a continuous layer of vermiculite with very low air permeability.

Claims (1)

EN 10795 6 PATENT FORMULA Fiberglass fabric dressing method by treating fiberglass fabrics with a dressing, characterized in that the glass fiber fabric dressing contains a microlite vermiculite dispersion in a mixture of distilled water and acrylic latex, wherein the microlite vermiculite, distilled water and acrylic latex ratio (% by weight) ) is 80: 29.4: 0.6, respectively.