BE1024881B1 - Woven structure with flame retardant properties and high abrasion resistance - Google Patents

Abstract

The invention relates to a woven structure which essentially comprises a first type of yarn in warp and weft and, to a limited extent, comprises a second type of yarn in warp or weft. The first type of yarn comprises a spun yarn with inherent flame-retardant properties. The second type of yarn comprises a polyester-polyarylate liquid crystal fiber. The invention further relates to a method for making such a woven structure.

Description

(30) Priority data:

(73) Holder (s):

CONCORDIA TEXTILES NV

8790, WAREGEM

Belgium (72) Inventor (s):

BAEKELANDT Cari 8790 WAREGEM Belgium

INGHELBRECHT Kurt 8790 WAREGEM Belgium

TUYTENS Manu 8790 WAREGEM Belgium (54) Woven structure with flame-retardant properties and high abrasion resistance (57) The invention relates to a woven structure which mainly comprises a first type of yarn in warp and weft and at least in a limited extent in warp or weft comprises a second type of yarn. . The first type of yarn comprises a spun yarn with inherently flame-retardant properties. The second type of yarn comprises a polyester polyarylate liquid crystal fiber. The invention further relates to a method of making such a woven structure.

Fig. 1 «14

BELGIAN INVENTION PATENT

FPS Economy, K.M.O., Self-employed & Energy

Publication number: 1024881 Filing number: BE2017 / 5311

Intellectual Property Office

International classification: D03D 15/12 D03D 1/00 Date of issue: 01/08/2018

The Minister of Economy,

Having regard to the Paris Convention of 20 March 1883 for the Protection of Industrial Property;

Having regard to the Law of March 28, 1984 on inventive patents, Article 22, for patent applications filed before September 22, 2014;

Having regard to Title 1 Invention Patents of Book XI of the Economic Law Code, Article XI.24, for patent applications filed from September 22, 2014;

Having regard to the Royal Decree of 2 December 1986 on the filing, granting and maintenance of inventive patents, Article 28;

Having regard to the application for an invention patent received by the Intellectual Property Office on 03/05/2017.

Whereas for patent applications that fall within the scope of Title 1, Book XI, of the Code of Economic Law (hereinafter WER), in accordance with Article XI.19, § 4, second paragraph, of the WER, the granted patent will be limited. to the patent claims for which the novelty search report was prepared, when the patent application is the subject of a novelty search report indicating a lack of unity of invention as referred to in paragraph 1, and when the applicant does not limit his filing and does not file a divisional application in accordance with the search report.

Decision:

Article 1

CONCORDIA TEXTILES NV, Flanders-Fieldweg 37, 8790 WAREGEM Belgium;

represented by

EECKHAOUDT Sabine, Gloxiniastraat 28, 9940, EVERGEM;

a Belgian invention patent with a term of 20 years, subject to payment of the annual taxes as referred to in Article XI.48, § 1 of the Economic Law Code, for: Woven structure with flame-retardant properties and high abrasion resistance.

INVENTOR (S):

BAEKELANDT Carl, Concordia Textiles NV Flanders-Fieldweg 37, 8790, WAREGEM;

INGHELBRECHT Kurt, Concordia Textiles NV Flanders-Fieldweg 37, 8790, WAREGEM;

TUYTENS Manu, Concordia Textiles NV Flanders-Fieldweg 37, 8790, WAREGEM;

PRIORITY:

BREAKDOWN:

Split from basic application: Filing date of the basic application:

Article 2. - This patent is granted without prior investigation into the patentability of the invention, without warranty of the Merit of the invention, nor of the accuracy of its description and at the risk of the applicant (s).

Brussels, 01/08/2018,

With special authorization:

BE2017 / 5311

Woven structure with flame retardant properties and high abrasion resistance

Field of the invention

The invention relates to a woven structure with flame-retardant properties and a high abrasion resistance. The invention further relates to a method of making a woven structure with flame retardant properties and high abrasion resistance.

Background art

Woven structures comprising yarns with inherently flame-retardant properties are known. Such woven structures include, for example, yarns comprising modacrylic.

However, some of these woven structures have limited abrasion resistance. As a result, the applications of woven structures are limited.

There is therefore a need for woven structures, in particular woven structures comprising modacrylic, which have flame retardant properties and at the same time are characterized by good abrasion resistance.

Summary of the invention

It is an object of the invention to provide a woven structure which has flame-retardant properties and at the same time is characterized by a high abrasion resistance.

It is another object of the invention to provide a woven structure which, in addition to flame-retardant properties, is characterized by a high tensile strength and a high tear resistance.

Furthermore, it is an object of the invention to provide a method for making such a woven structure.

According to a first aspect of the invention, a woven structure is provided which mainly comprises a first type of yarn in warp and weft. This first type of yarn comprises a spun yarn with inherently flame-retardant properties. The woven

BE2017 / 5311 structure further comprises a second type of yarn in warp or weft to a limited extent. This second type of yarn comprises a liquid crystal fiber. This liquid crystal fiber preferably comprises polyester polyarylate.

Preferably, the woven structure comprises at least 85 weight percent of the first type of yarn, such as, for example, at least 90 weight percent or 95 weight percent.

The second type of yarn is limited in warp or weft or both warp and weft. By "to a limited extent" is meant that the percentage of the second type of yarn is preferably less than 15 weight percent, such as, for example, less than 10 weight percent or less than 5 weight percent.

By "flame retardant" is meant: suitable for preventing or preventing a flame from spreading. In addition, flame retardant means: Able to suppress smoke formation when the yarn or textile structure is exposed to a heat source. Textiles with limited flame spread are classified in three classes according to EN ISO 14116, ie class 1, class 2 or class 3. The test method is described in EN ISO 15025.

By "yarn with inherently flame-retardant properties" is meant yarn that at least partially comprises flame-retardant fibers.

The first type of yarn preferably comprises a mixture of synthetic fibers and cellulosic fibers.

By cellulosic fibers is meant any fiber comprising cellulose or any fiber derived from cellulose. Examples of cellulosic fibers include cotton, modified cotton, linen and derivatives or mixtures thereof.

The proportion of cellulose-containing fibers in the mixture is preferably between 25 and 45% by weight. In certain preferred embodiments, the proportion of cellulosic fibers in the first type of yarn is between 30 and 40 weight percent, such as, for example, 33 weight percent or 35 weight percent.

As a synthetic fiber of the first type of yarn, any synthetic fiber with inherently flame-retardant properties can be considered. Examples include, for example, modacrylic fibers, aramid fibers, polyester (PES) fibers such as, for example, flame-retardant polyester (PES-FR) fibers, or polyamide (PA) fibers, such as, for example

BE2017 / 5311 flame retardant polyamide (PA-FR) fibers. In a preferred embodiment, the synthetic fiber of the first type of yarn comprises modacrylic. Preferably, the synthetic fibers of the first type of yarn comprise a mixture of fibers such as, for example, a mixture of modacrylic fibers and polyamide fibers, preferably flame-retardant polyamide fibers.

The percentage of synthetic fiber in the first type of yarn preferably ranges between 55 and 75 weight percent and more preferably between 60 and 70 weight percent, such as, for example, 63 weight percent or 65 weight percent. If the synthetic fiber comprises modacryl, the percentage of modacryl in the first yarn preferably ranges between 45 and 50 weight percent and more preferably between 46 and 48 weight percent. In a preferred embodiment, the first type of yarn comprises, for example, between 45 and 50 weight percent modacrylic fibers and between 15 and 20 weight percent polyamide fibers, such as, for example, flame-retardant polyamide fibers.

As mentioned above, the second type of yarn comprises liquid crystal fiber, preferably polyester polyarylate liquid crystal fiber. Polyester polyarylate liquid crystal fibers are marketed under the brand name Vectran®.

The proportion of liquid crystal fibers in the second type of yarn preferably ranges between 20 and 40 weight percent, and more preferably between 25 and 35 weight percent.

If the liquid crystal fibers in the second type of yarn comprise polyester-polyarylate, the proportion of polyester-polyarylate fibers in the second type of yarn is preferably between 20 and 40% by weight and more preferably between 25 and 35% by weight, such as, for example, 30% by weight.

In addition to the liquid crystal fibers, the second type of yarn preferably also comprises synthetic fibers, such as, for example, polyamide fibers, polyester (PES) fibers or viscose fibers. For example, polyamide fibers include PA 66 or HT PA 66. The polyester fibers include, for example, HT PES. The proportion of synthetic fibers in the second type of yarn preferably ranges between 60 and 80 weight percent and more preferably between 65 and 75 weight percent, such as, for example, 70 weight percent.

BE2017 / 5311

By the combination of the first type of yarn and a limited amount of the second type of yarn, a woven structure is obtained which is characterized not only by good flame-retardant properties but also by good abrasion resistance, good tensile strength and good tear resistance.

In preferred embodiments, two consecutive yarns of the second type of yarn are spaced a predetermined distance from each other. The distance between two consecutive yarns of the second type of yarn is preferably at least 0.3 cm, 0.5 cm, 0.7 cm, 0.8 cm, 1 cm, 1.2 cm or 1.5 cm.

In a first group of woven structures, the yarn of the second type is only weft. For example, the distance between two consecutive yarns of the second type in weft is at least 0.3 cm, 0.5 cm, 0.7 cm, 0.8 cm, 1 cm, 1.2 cm or 1.5 cm.

In a second group of woven structures, the yarn of the second type is only in warp. For example, the distance between two consecutive yarns of the second type in warp is at least 0.3 cm, 0.5 cm, 0.7 cm, 0.8 cm, 1 cm, 1.2 cm or 1.5 cm.

In a third group of woven structures, the second type yarn is both warp and weft. The distance between two successive yarns of the second type in warp and weft is, for example, minimum 0.3 cm, 0.5 cm, 0.7 cm, 0.8 cm, 1 cm, 1.2 cm or 1.5 cm. In this way, the yarn of the second type forms, as it were, a grid structure with a mesh size of at least 0.3 x 0.3 cm, 0.5 x 0.5 cm, 0.7 x 0.7 cm, 0.8 x 0.8 cm, 1 xl cm, 1.2 x 1.2 cm or 1.5 x 1.5 cm.

To give the woven fabric anti-static properties, it may be desirable for the woven fabric to include anti-static yarn. For example, the woven structure comprises between 0.3 and 1.5 weight percent anti-static yarn. In preferred embodiments, the woven structure comprises between 0.5 and 1 weight percent, such as, for example, 1 weight percent anti-static yarn. The anti-static yarn can occur in warp, weft or both warp and weft. Preferably

BE2017 / 5311 the anti-static yarn occurs at least in weft. The anti-static yarn can be of the core conductor type or surface conductor type.

In preferred embodiments, two successive anti-static yarns are spaced a predetermined distance from each other. The distance between two successive anti-static yarns is preferably at least 0.5 cm, 0.7 cm, 0.8 cm or 1 cm.

In certain preferred embodiments, two consecutive anti-static yarns are at a predetermined distance from each other corresponding to the distance between two consecutive yarns of the second type. For example, the anti-static yarn is integrated into the woven structure in such a way that the anti-static yarn contacts the second type yarn.

In a first group of woven structures, the yarn of the second type and the antistatic yarn are only weft. The distance between two consecutive yarns of the second type and the distance between two consecutive anti-static yarns is preferably at least 0.5 cm, 0.7 cm, 0.8 cm or 1 cm. The anti-static yarn preferably contacts the second type yarn.

In a second group of woven structures, the yarn of the second type and the anti-static yarn are only in warp. The distance between two consecutive yarns of the second type and the distance between two consecutive anti-static yarns is preferably at least 0.5 cm, 0.7 cm, 0.8 cm or 1 cm. The anti-static yarn preferably contacts the second type yarn.

In a third group of woven structures, the yarn of the second type and the anti-static yarn are both in warp and weft. The distance between two successive yarns of the second type and the distance between two successive anti-static yarns in warp and weft is preferably minimum 0.3 cm, 0.5 cm, 0.7 cm, 0.8 cm, 1 cm, 1.2 cm or 1.5 cm. The anti-static yarn preferably contacts the second type yarn. In this way, the yarn of the second type and the antistatic yarn form, as it were, a grid structure with a mesh size of at least 0.5 x 0.5 cm, 0.7 x 0.7 cm, 0.8 x 0.8 cm or 1 x 1 cm.

BE2017 / 5311

The woven structure according to the invention can comprise different bonds and patterns. Examples of bindings include the plain weave, the twill weave and the satin weave.

A woven structure according to the invention may further comprise one or more coatings, such as, for example, a water-repellent coating, a dirt-repellent coating, an anti-bacterial layer, an anti-mosquito layer or combinations thereof.

In addition, a woven structure according to the invention can be subjected to a post-treatment. The woven structure can, for example, be subjected to a heat treatment.

According to a second aspect of the invention, the use of a woven structure as described above is envisioned as a fire resistant textile. A woven structure according to the invention is particularly suitable as protective clothing for welding, as protective clothing against heat and flame, as protective clothing against liquid chemicals or as protective clothing against thermal hazards from electric arcs, as specified in EN ISO 11611, for example. , EN ISO 11612, EN ISO 13034, IEC 61482-1-1 and IEC 61482-1-2.

According to a third aspect of the invention, a method of making a woven structure as described above is provided. The method includes the following steps:

providing a first type of yarn; wherein the first type of yarn is a spun yarn with inherently flame retardant properties;

- providing a second type of yarn; wherein the second type of yarn comprises a liquid crystal fiber, preferably a polyester polyarylate liquid crystal fiber;

weaving the first type of yarn and the second type of yarn.

In a preferred embodiment, the method of making a woven structure comprises the following steps:

BE2017 / 5311 providing a first type of yarn; wherein the first type of yarn is a spun yarn with inherently flame retardant properties;

providing a second type of yarn; wherein the second type of yarn comprises a liquid crystal fiber, preferably a polyester polyarylate liquid crystal fiber;

providing an anti-static yarn;

weaving the first type of yarn, the second type of yarn and the anti-static yarn.

Short indication of the drawings

The invention is further elucidated with reference to the annexed drawings, in which:

Figure 1 shows a first example of a woven structure according to the invention; with the yarn of the second type in chain;

Figure 2 is a second example of a woven structure according to the invention;

with the yarn of the second type in warp and weft;

Figure 3 is a third example of a woven structure according to the invention; with the yarn of the second type in warp and weft and additionally with an anti-static yarn in warp / weft / warp and weft.

Description of embodiments

The drawings are only schematic and non-limiting. The dimensions and relative dimensions of the different elements of the drawings do not correspond to the actual dimensions and relative dimensions. The size of certain elements in the drawings may be exaggerated and not drawn to scale.

Figure 1, Figure 2 and Figure 3 show three different embodiments of a woven structure according to the invention.

Figure 1 is a schematic representation of a first embodiment of a woven structure 10 according to the invention. The woven structure 10 is included in warp 11

BE2017 / 5311 and in weft 12 mainly a first type of yarn 13. The woven structure 10 to a limited extent comprises a second type of yarn 14. The woven structure 10 preferably comprises at least 85% by weight of yarn of the first type and preferably at most 15% by weight yarn of the second type.

The first type of yarn 13 comprises a mixture of modacrylic fibers and cellulosic fibers. The proportion of cellulosic fibers, such as, for example, cotton fibers, preferably varies between 25 and 45% by weight and is, for example, 33% by weight. The proportion of modacrylic fibers is preferably between 45 and 50% by weight and is, for example, 46% by weight. Furthermore, the first type of yarn includes, for example, polyamide (PA) fibers, such as flame retardant polyamide (PA-FR) fibers.

The second type of yarn 14 preferably comprises between 20 and 40 weight percent polyester-polyarylate liquid crystal fibers, such as, for example, 30 weight percent polyester-polyarylate liquid crystal fibers. The polyester-polyarylate fibers are commercialized as Vectran® fibers.

The woven structure 10 comprises the second type of yarn 14 only in warp 11. The distance between two neighboring yarns of the second type 14 is, for example, 1 cm.

Figure 2 is a schematic representation of a second embodiment of a woven structure 20 according to the invention. The woven structure 20 mainly comprises a first type of yarn 23 in warp 21 and in weft 22. The woven structure 20 comprises to a limited extent a second type of yarn 24. The woven structure 20 preferably comprises at least 85% by weight of yarn of the first type and preferably no more than 15 weight percent yarn of the second type.

The first type of yarn 23 comprises a mixture of modacrylic fibers and cellulosic fibers, such as, for example, cotton fibers. The proportion of cellulose-containing fibers preferably varies between 25 and 45% by weight and is, for example, 35% by weight.

The proportion of modacrylic fibers preferably varies between 45 and 50% by weight and is, for example, 48% by weight. Furthermore, the first type of yarn includes, for example, polyamide (PA) fibers, such as flame retardant polyamide (PA-FR) fibers.

BE2017 / 5311

The second type of yarn 24 preferably comprises between 20 and 40 weight percent polyester-polyarylate liquid crystal fibers, such as, for example, 30 weight percent polyester-polyarylate liquid crystal fibers.

The woven structure 20 includes the second type of yarn 24 both in warp 21 and weft 22. The distance between two adjacent yarns of the second type 24 is, for example, 1 cm.

Figure 3 is a schematic representation of a third embodiment of a woven structure 30 according to the invention. The woven structure 30 mainly comprises a first type of yarn 33 in warp 31 and weft 32. The woven structure 30 comprises to a limited extent a second type of yarn 34. The woven structure 30 preferably comprises at least 85% by weight of yarn of the first type and preferably no more than 15 weight percent yarn of the second type.

The first type of yarn 33 includes modacrylic fibers and cellulosic fibers, such as, for example, cotton fibers. The proportion of cellulose-containing fibers preferably varies between 25 and 45% by weight and is, for example, 33% by weight. The proportion of modacrylic fibers preferably varies between 45 and 50% by weight and is, for example, 47% by weight. Furthermore, the first type of yarn includes, for example, polyamide (PA) fibers, such as flame retardant polyamide (PA-FR) fibers.

The second type of yarn 34 preferably comprises between 20 and 40 weight percent polyester-polyarylate liquid crystal fibers, such as, for example, 30 weight percent polyester-polyarylate liquid crystal fibers.

The woven structure 30 includes the second type of yarn 34 in warp 31 and weft

32. The distance between two neighboring yarns of the second type 34 is, for example, 1 cm.

The woven structure 30 further comprises anti-static yarn 35. The anti-static yarn 35 occurs, for example, in weft 32. The distance between two successive anti-static yarns 35 is, for example, 1 cm. The anti-static yarn 35 preferably contacts the second type 34 yarn in weft.

BE2017 / 5311

The flame retardancy, abrasion resistance, tensile strength and tear resistance of a woven structure according to the invention as shown in

Figure 3 is compared with the flame retardant properties, the abrasion resistance, the tensile strength and the tear resistance of a woven structure having the same weight as the woven structure shown in Figure 3 but which does not include a second type yarn.

The flame retardant properties of the woven structures are determined by the method described in EN ISO 15025 and classified according to EN ISO 14116. The abrasion resistance of the woven structures is determined by the method described in EN ISO 12947-2; the tensile strength of the woven structures is determined by the method described in EN ISO 13934-1 and the tear resistance is determined by the method described in EN ISO 13937-1, EN ISO 13937-2, EN ISO 13937-3 and EN ISO 13937- 4 and ISO 4674 - 1 A.

In the comparative tests, the woven structure according to the invention as shown in Figure 3 is called "woven structure according to the invention"; the woven structure having the same weight as the woven structure shown in Figure 3 but which is not a second type yarn is called "comparative example of a woven structure".

The following conclusions can be drawn from the comparative tests:

The woven structure according to the invention and the comparative example of a woven structure have the same flame-retardant properties. Thus, the presence of the second type yarn does not adversely affect the flame retardant properties of the woven fabric of the invention.

The abrasion resistance of the woven structure according to the invention is 100% higher than the abrasion resistance of the comparative example of a woven structure. Thus, the presence of the second type yarn greatly enhances the abrasion resistance of a woven fabric.

The tear resistance of the woven structure according to the invention is 50% higher than the tear resistance of the comparative example of a woven structure. Thus, the presence of the second type yarn significantly increases the tear resistance of a woven fabric.

BE2017 / 5311

The tensile strength of the woven structure according to the invention as shown in Figure 3 is similar to the tensile strength of the woven structure with the same weight.

In summary, we can say that the woven structure according to the invention has good flame-retardant properties in combination with good abrasion resistance, good tear resistance and good tensile strength.

BE2017 / 5311

Claims (18)

Conclusions A woven structure (10) mainly comprising a first type of yarn (13) in warp (11) and weft (12), wherein the first type of yarn (13) comprises a spun yarn with inherently flame-retardant properties and wherein the woven Structure (10) at least in warp (11) or weft (12) to a limited extent comprises a second type of yarn (14), the second type of yarn (14) comprising a liquid crystal fiber, the liquid crystal fiber comprising polyester polyarylate . A woven structure (10) according to claim 1, wherein the amount of fiber 10 of the first type of yarn (13) comprises at least 85 weight percent of the woven structure (10). A woven structure (10) according to claim 1 or claim 2, wherein the amount of fibers of the second type of yarn (14) is at most 15 weight percent 15 of the woven structure (10). A woven structure (10) according to any preceding claim, wherein the first type of yarn (13) comprises a blend of synthetic fibers and cellulosic fibers. A woven structure (10) according to claim 4, wherein the proportion of cellulosic fibers in the first type of yarn (13) varies between 25 and 45 weight percent. 25 A woven structure (10) according to claim 4 and claim 5, wherein the proportion of synthetic fibers in the first type of yarn (13) varies between 55 and 75 weight percent. A woven structure (10) according to any one of claims 4 to 6, wherein the Synthetic fibers of the first type of yarn (13) comprise modacrylic. A woven structure (10) according to claim 7, wherein the proportion of modacrylic fibers in the first type of yarn (13) varies between 45 and 50 weight percent. BE2017 / 5311 A woven structure (10) according to any of the preceding claims, wherein the proportion of polyester-polyarylate liquid crystal fiber in the second type of yarn (14) ranges between 20 and 40 percent by weight. A woven structure (10) according to claim 9 wherein the second type of yarn (14) further comprises polyamide fibers. A woven structure (10) according to any of the preceding claims, wherein The distance between two consecutive yarns of the second type of yarn (14) is at least 0.5 cm. A woven structure (10) according to any preceding claim, wherein the woven structure (10) is the second type of yarn (14) in warp (11) and weft 15 (12). A woven structure (10) according to any preceding claim, wherein the woven structure (10) further comprises anti-static yarn (35). 20 A woven structure (10) according to claim 13, wherein the distance between two successive anti-static yarns (35) is at least 0.5 cm. A woven structure (10) according to claim 14, wherein the anti-static yarn (35) contacts the second type of yarn (14). Use of a woven structure (10) as defined in any one of claims 1 to 15 as a fire resistant textile. A method of making a woven structure (10) as defined in any one of claims 1 to 15, wherein the method comprises the following steps - providing a first type of yarn (13), the first type of yarn (13) being a spun yarn with inherently flame-retardant properties; BE2017 / 5311 - providing a second type of yarn (14), the second type of yarn (14) comprising a liquid crystal fiber, preferably a polyester-polyarylate liquid crystal fiber; - weaving the first type of yarn (13) and the second type of yarn (14). The method of making a woven structure (10) according to claim 17, wherein the method further comprises the following steps - providing an anti-static yarn (35); weaving the first type of yarn (13), the second type of yarn (14) and the 1 o anti-static yarn (35). BE2017 / 5311 BE2017 / 5311 BE2017 / 5311 BE2017 / 5311