TR201815564T4 - Bielastic fabric and its production process. - Google Patents

Abstract

Disclosed herein is a bielastic fabric comprising biopolyamide yarn and elastane yarn having superior elastic properties and high dimensional stability, and a cost-effective, effective process for obtaining it.

Description

DESCRIPTION BIELASTIC FABRIC AND ITS MANUFACTURING PROCESS FIELD OF INVENTION The present invention contains biopolyamide yarn and elastane yarn, with superior elastic properties and a bielastic fabric with high dimensional stability, also relates to a cost-effective, effective process for

INFRASTRUCTURE TECHNIQUE circular knit with a coated bare elastoineric material, single jersey, French fabrics such as terry fabric and at least one of the fleece fabrics, such as elastic fabrics A method for producing it is known. The method in question is circular knitting, under temperature and pressure conditions of elastic, single jersey fabric and elastomeric a continuous phase for a sufficient time to substantially harden the material. involves contacting the aqueous solution.

Also, Misra et al. (2011) and Grancaric et alf (2013) in other words, green plastics obtained from crops, automotive, design, medical It is known that it is becoming increasingly important in many applications such as devices and textile products.

Environmental impact issues related to the textile industry, especially water and air emissions, water and energy use is known and already attracting attention.

Therefore, without compromising the technical features of the products, energy consumption and Being able to produce textile products and clothing products that reduce environmental impact is an important is the purpose. 02141-P-0001 Thus, it is possible to achieve such problems with superior features and technical performance at the same time. It is an object of the present invention to provide a solution that allows

BRIEF DESCRIPTION OF THE INVENTION The object in question is a process and a process as defined in requirements 1 to 5, respectively. It is obtained with a bielastic fabric.

In another aspect, the present invention is directed towards obtaining such a bielastic fabric. relates to a process.

On the other hand, the present invention is at least in part made from such a bielastic fabric. relates to an item of clothing or furniture.

BRIEF DESCRIPTION OF THE FIGURES The features and advantages of the present invention are from the following detailed description, from the embodiments illustrated by non-limiting examples and the attached It will become more obvious than the shapes, here: 0 Figure 1, jersey seen from the knit side on the left and the purl on the right shows the kumasin (haraso weave) pattern; 0 Figure 2 shows the bielastic jersey fabric from Example li; . Figure 3 shows the front overlapping of the front and rear seams. interlock shows the fabric pattern: the second is only the shape itself represented by finer lines to aid understanding, in fact, they are all the same length and width. 0 Figure 4 shows the overlap of the front and back seams in perspective. shows the same interlock fabric pattern as in Figure 3; and . Figure 5 shows the bielastic interlock fabric from Example 3. 02141-P-0001 DETAILED DESCRIPTION OF THE INVENTION The invention is thus combined with a bielastic fabric comprising biopolyainide yarn and elastane yarn. income. Preferably, for the purposes of the present invention, the biopolyamide is formed. biomass from which it comes, the castor referred to as "Ricinus communis" The monomers used in the polymerization process are partially or It is completely derived from castor oil.

Biopolyamides are highly resistant to chemical agents, especially hydrocarbons, exhibits dimensional stability, relatively low density and good machinability.

Preferably, said biopolyamide is biopolyamide 6, biopolyamide 6.6, it's a mix of it.

More preferably, said biopolyamide is biopolyamide 6.6. It has number one in between. fiber is expressed.

Currently, polyurethane is typically produced from raw materials. reaction two a polyol in the first step, then amines or glycols 02141-P-0001 an intermediate referred to as the prepolymer to be bound together with It is placed to react with a diisocyanate to form polyol both It has hydroxyl functional groups (-OH) at the end and the molecule is elastic. It is characterized by the fact that it will form the part; it is a polyester or a polyether or it could be a mixture of these. Diisocyanate, by contrast, at the ends has isocyanate functional groups (-NCO) and the hard part of polyurethane will be. The most commonly used isocyanate is diphenylmethane diisocyanate ("MDI", 1- isocyanate-4-[(4-phenylisocyanate)methyl]benzene).

The reaction occurs between -NCO and -OH groups to form a urea bond. income, and due to the 2:1 molar ratio of isocyanate to polyol, the final product is a will be macrodiisocyanate, ie -NCO at the prepolymer ends It will be a macromolecule with groups.

Chain elongation is achieved by the addition of bifunctional amines (HZNR-NHz) to the prepolymer. is obtained, which reacts with -NCO groups to form a urethane bond.

The exothermic reaction increases the molecular weight and with it the Viscosity a hundredfold; In order to keep the product usable, the reaction is carried out in a suitable solvent and small amounts of monofunctional amines regulate its final length.

The most common solvents are dimethylformamide (DMF) and dimethylacetamide (DMAC).

An elastane yarn suitable for the purposes of the present invention is internationally patented. its reference is the yarn described in WO0181443.

In preferred embodiments, said elastane yarn (A) is poly(tetramethylene-ether- co-2methyltetramethylene-ether)glycol, (B) a 1-isocyanate-4- in total diisocyanate 1-isocyanate-2-[(4'-isocyanatephenyl)methyl]benzene (" is the reaction product between the mixture and (C) at least one chain extender.

More preferably, said elastane yarn (A) is poly(tetramethylene-ether- 02141-P-0001 co-2methyltetrainethylene-ether)glycol, (B) a 1-isocyanate-4- in total diisocyanate between a mixture of isocyanatphenyl1)methyl]benzene and (C) at least one chain extender. is the reaction product.

Preferably, chain extender ethylenediamine, 1,4-butanediamine, 1,6-hexanediamine, 1,2- propanediamine, 1,3-propanediamine, 2-methyl-1,5-pentanediamine, 1,4- cyclohexanediamine, 1,3-cyclohexanediamine, 1,3-diaminopentane or one of these is a mixture.

In preferred embodiments, the chain extender is ethylenediamine.

Elastane yarn is preferably obtained by dry spinning.

Preferably, at least 601%n1 of bielastic fabric biopolyamide yarn, more preferably It contains at least 70% of the biopolyamide yarn as indicated.

Preferably, the bielastic fabric comprises at least 5% of the elastane yarn, more preferably It contains at least 15% of elastane yarn. has the number. Alternatively, commercially available elastane yarns, for example Easy Set LYCRA® yarns released by Invista can be used.

Preferably, the bielastic fabric has a weight of 50-270 g/sqm (grams/square meter). has. Grams is the weight of a fabric per unit area, grams per square meter It is expressed in terms and is an indication of the total amount of fiber in the fabric. Typical The reference is rounded to ten grams for practical reasons, therefore which is different from the actual weight corresponding to the actual weight per unit area” nominal weight". For the purposes of the present invention, the specified grammage, 02141-P-0001 actual weight is a nominal weight corresponding to ±5 g/sqml. Weight measurement l Obtained by taking the circumference of a fabric having a diameter of 1 cm and measured with a precision balance.

In some embodiments, the bielastic fabric contains at least 60°1% of biopolyamide yarn and Contains at least 5% of elastane yarn.

Preferably, the bielastic fabric contains at least 70% of the biopolyamide yarn and the most of the elastane yarn. contains at least 15%.

More preferably, the bielastic fabric contains at least 75% of the biopolyamide yarn. It contains 90% of the elastane yarn and 15-25% of the elastane yarn.

Preferably, the bielastic fabric has a jersey stitch or an interlock stitch. refers to. Since it is produced with knitting machines, the length and width It is elastic in terms of warp knitting and is anti-ejaculation. has features. An Example of the jersey fabric pattern is shown in Figure 1. it is easy; in double knitting machines, in other words, working in opposite positions. Made with two rows of needles, weft is one of the basic textures of knitting. Cylinder their needles will coincide with the dial pins, so they cannot be sewn together; therefore, with single needles of single thread cylinder needles and double ones with dial needles embroidered, thus creating a first row of rib stitching. next thread, first it is machined with non-working needles: thus a second rib is “crossed” with the first sequence is obtained. This results in a thickness and volume similar to that of the rib stitch however, it has a more reduced extensibility. Interlock fabric pattern an example is shown in Figures 3 and 4. 02141-P-0001 More preferably, the bielastic fabric has a weight of 100-250 g/sqm, For the purposes of the present invention, 10<5 cm2" fabric of stretch fabric strips of the dynamometer and their It is measured by placing the Zwick/Roell Z0.5). In the direction of the weft with “elasticity in the weft” While expressing the measure of elasticity taken, "elasticity in the warp" is taken in the warp direction. stands for flexibility.

In some embodiments, the bielastic fabric has 75-90.1n1 of biopolyamide yarn and spandex. It has 90 % elasticity and 35-80% elasticity in warp. Preferably, bielastic quinas has flexibility.

In other embodiments, the bielastic fabric consists of 75-90% of the biopolyamide yarn and bielastic fabric consists of 70-80% of biopolyamide yarn and 20-30% of elastane yarn It has 140-180% flexibility in warp.

In other embodiments, the bielastic fabric consists of 75-90%1 of the biopolyamide yarn and bielastic fabric consists of 70-80% of biopolyamide yarn and 20-307% of elastane yarn and has 60-90% flexibility in warp. 02141-P-0001 Optionally, the bielastic fabric can also be selected from wool, cotton, silk and linen. may comprise at least one yarn of natural fiber.

Optionally, the bielastic fabric can also be made of polyester, polyamide, acetate, acrylic, synthetic fiber selected from rayon and polyolefin such as polyethylene or polypropylene may contain a small amount of thread.

In some embodiments, the bielastic fabric is primarily composed of biopolyamide yarn and elastane. consists of thread. The expression “mainly consists” of the fabric also means that the final other types of yarns that do not change the technical properties of the bielastic fabric indicates that it can.

In other embodiments, the bielastic fabric is composed of biopolyamide yarn and elastane yarn. Preferred for bielastic fabric containing biopolyamide yarn and elastane yarn. and advantageously defined as all axes, mainly biopolyamide yarn and elastane. for bielastic fabric consisting of yarn and biopolyamide yarn and elastane yarn also similarly preferred and advantageous for the bielastic fabric formed will be understood as.

In another aspect, the present invention is a bielastic fabric as described above. It is related to the production process, which includes the following steps: a) biopolyamide yarn and elastane yarn to obtain a fabric planting, b) More than 160°C for no more than 100 seconds heat-curing said fabric at a temperature that is not; and request depending on, 0) thus dyeing of heat-cured fabric. 02141-P-0001 In step a) of the process, a fabric is obtained according to known procedures in the field.

Preferably, the fabric is obtained by circular knitting by sewing two threads.

More preferably, the fabric has jersey stitching or interlock stitching.

For the purposes of the present invention, knitting looms are able to use the stitches they produce. selected based on the quantity; preferably fineness E, ("Pins per English inch" number of times”) is in the range of E20 to E50. In particular, jersey fabric is produced with a single knitting machine, while interlock fabric is produced by a single knitting machine. It is obtained with a double knitting machine.

In step b) of the process, the heat setting step of the fabric obtained in step a) is performed. It is a heat treatment for the hardening of the fibres, which gives mass perpendicular stability. The heat treatment can be carried out with various heat sources: it's hot air in a stretching machine, . steam under pressure in the evaporator o Hot water in HT equipment Typical thermosetting for standard polyamide fabrics the temperatures are 190-195°C.

Biopolyamides require lowering the heat curing temperature to approximately 165 °C. 02141-P-0001 For standard elastic material fabrics, thermosetting Typical temperatures at which it is carried out are 190-195°C.

Combining biopolyamide yarn and elastane yarn as described above heat-curing step at a temperature of not more than 160°C, through b), with the realization of superior elastic properties and high dimensional It is possible to obtain a heat-hardened fabric with stability. found in a surprising way. This keeps the original and bright colors, without compromising the technical properties of the fabric such as touch softness and flexibility. Energy consumption and production efficiency due to reduced processing time provides a clear advantage.

This result is comparable to Easy Set LYCRA® yarns launched by Invista. 170-175°C at the temperature specified by the manufacturer for heat-hardening for It's even more surprising, given that it's

Therefore, the combination of the threads of the invention is the traditional Compared to yarns, single yarns already have a large amount of outweighs its advantages. Preferably, heat curing step b), 30-70 seconds, more preferably performed over a period of 40-45 seconds.

Preferably thermosetting step b), 100-160°C, more preferred carried out at a temperature of 120-160°C.

Optionally, the process also includes instructions for dyeing thermosetting fabric. a step c).

Said step may be performed according to techniques known in the art, however, Dyeing is preferably carried out on overflow dyeing machines at atmospheric pressure.

In such machines, the fabric is in a heap consisting of water, auxiliary products and dyes. 02141-P-0001 moves at varying speeds. Maximum achievable temperature from 100°C In preferred embodiments, dyeing step c) includes the following substeps: Washing at 90°C, neutralization of the wash, 24 minutes at 98°C throughout, preferably continuously for 30 minutes dyeing with dye dosage throughout, stripping, treating with a stabilizer, and vi) final cold wash.

After this step, the dyed fabric is unloaded from the machines and a specific mechanism is is opened using

After that, the fabric is dyed. Preferably, the dyeing is for minutes at a temperature of 90°C. It is carried out on a tensioning machine at a speed of about 20 meters per head.

In another aspect, the present invention is a method obtainable by the above-described process. relates to bielastic fabric, the said biastic fabric is made of biopolyamide yarn and Contains elastane yarn.

The fabric thus obtained is quite soft, comfortable and technical. Therefore especially for seawear, underwear and sportswear such as inayo. suitable. 02141-P-0001 On the other hand, therefore the present invention is also at least partially bielastic. It relates to an article of clothing or an article of furniture made of fabric. for example shirt, trousers, skirt, jacket, dress, shirt, blouse, sweater, also handbags, briefcases, Wallets, portfolios, key cases, phones and accessories such as covers for tablets. In particular, such as swimwear refers to articles of clothing such as seawear, underwear and sportswear. covers, curtains, tablecloths and pillows, benches, armchairs, sofas, It is stated to include covers for chairs, beds and ottomans.

All the preferred and advantageous pains for the bielastic fabric, also the production process and the resulting bielastic fabric, as well as clothing or similarly preferred and advantageously for furniture will be understood to be counted.

The bielastic fabric is the result of the preparation process and thus the resulting bielastic fabric, also preferred angles of the above-mentioned article of clothing or furniture and all combinations of its embodiments, as further described understandable.

The following are non-limiting examples of processing of the present invention. EXAMPLES Circular knitting on a single knitting machine (fineness E = E28) and a biopolyamide yarn and an elastane 02141-P-0001 by knitting yarn (marketed by Invista as Easy Set LYCRA®) 195 83% biopolyamide yarn (number 88 dTex) with a weight of g/sqmalik and The jersey fabric thus obtained is heated at a temperature of 160°C for a period of 40-45 seconds. It was heat-hardened in a tensile machine.

Subsequently, the dyeing step was carried out; fabric collar painting loaded on their machines and the following dyeing cycle followed; . Washing at 90°C for 15 minutes, o Neutralization of the wash at 60°C for 10 minutes, o staining continuously for 30 minutes at 98°C for 24 minutes paint dosage 1, . Stripping at 40°C for 10 minutes, . treatment with a fixative at 70°C for 20 minutes and it's the ultimate cold wash.

After this step, the dyed fabric is unloaded from the machines and a specific mechanism is is opened using

Subsequently, the fabric is produced at a temperature of 90°C, approximately 20 meters per minute. It is dyed on a stretching machine at one speed.

The bielastic fabric thus obtained is shown in Figure 2 and has a 195 g/sqm weight, 60% flexibility in weft and 50% flexibility in warp. Weight Measurement circumference of a fabric with a diameter of 11 cm and a precision balance obtained by measuring. Instead, the flexibility is the 12 cm long taking strips of fabric and using them with a dynamometer Zwick/Roell Z0,5,e measured by placement. 02141-P-0001 A biopolyamide with circular knitting in a single knit machine (fineness E = E44) yarn and an elastane 115 by knitting yarn (marketed by Invista as Easy Set LYCRA®) 76% biopolyamide yarn (number 28 dTex) with a weight of g/sqm and The jersey fabric thus obtained is heated to a temperature of 160°C for a period of 40-45 seconds. It was heat-hardened in a tensile machine.

Subsequently, the dyeing step was carried out; fabric collar painting loaded on the machines and the following dyeing cycle was followed: . Washing at 90°C for 15 minutes, . Neutralization of washing at 60°C for 10 minutes, o staining continuously for 30 minutes at 98°C for 24 minutes paint dosage 1, . Scrape at 40°C for 10 minutes, o Treating with a fixative at 70°C for 20 minutes and it's the ultimate cold wash.

After this step, the dyed fabric is unloaded from the machines and a specific mechanism is is opened using

Subsequently, the fabric is heated to approximately 20 meters per minute at a temperature of 90°C. It is painted on a generator machine at one speed.

The bielastic fabric thus obtained is 115 g/sqm in weight, 160% in weft. It has 160% flexibility in flexibility and warp. Weight measurement is a diameter of 11 cm. by taking the circumference of a fabric that has 02141-P-0001 has been obtained. Instead, the flexibility is the result of 12 cm long strips of fabric. by taking them and placing them on a Zwick/Roell Z0.5” dynamometer has been measured.

A biopolyamide with circular knitting on a double knitting machine (fineness E = E40) yarn and an elastane by knitting yarn (marketed by Invista as Easy Set LYCRA®) 175 77% biopolyamide yarn (number 28 dTex) with a weight of g/sqm and The Interlock fabric thus obtained is at a temperature of 160°C for a period of 40-45 seconds. It has been heat-hardened in a tensile machine to one degree.

Subsequently, the dyeing step was carried out; fabric collar painting loaded on their machines and the following dyeing cycle followed; . Washing at 90°C for 15 minutes, . Neutralization of the wash at 60°C for 10 minutes, o staining continuously for 30 minutes at 98°C for 24 minutes paint dosage 1, o Stripping at 40°C* for 10 minutes, . Treating with a fixative at 70°C for 20 minutes and . ultimate cold wash.

After this step, the dyed fabric is unloaded from the machines and a specific mechanism is is opened using

Subsequently, the fabric is heated to approximately 20 meters per minute at a temperature of 90°C. It is dyed on a stretching machine at one speed. 02141-P-0001 Thus, the obtained bielastic fabric is shown in Figure 5% and a 175 g/sqm”1 weight, 150% in weft, elasticity and 70% in warp. Weight taking the circumference of a fabric whose measurement has a diameter of 11 cm and It was obtained by measuring with a precision balance. Instead, the flexibility is 12 cm length of fabric strips and a dynamometer of them Measured by placing it on the Zwick/Roell Z0.5.

A biopolyamide with circular knitting on a double knitting machine (fineness E = E28) yarn and an elastane by knitting yarn (marketed by Invista as Easy Set LYCRA®) 195 83% biopolyamide yarn (number 88 dTex) with a weight of g/sqmj and The jersey fabric thus obtained is heated to a temperature of 150°C for a period of 50-55 seconds. It was heat-hardened in a tensile machine.

Subsequently, the dyeing step was carried out; fabric collar painting was loaded onto their machines and the following staining cycle was followed: . Washing at 90°C for 15 minutes, o Neutralization of the wash at 60°C for 10 minutes, . staining continuously for 30 minutes at 98°C for 24 minutes dye dosage, . Stripping at 40°C for 10 minutes, . Treating with a fixative at 70°C for 20 minutes and it's the ultimate cold wash.

After this step, the dyed fabric is unloaded from the machines and a specific mechanism is is opened using 02141-P-0001 Subsequently, the fabric is heated at a temperature of 90°C to approximately 20 meters per minute. It is dyed on a stretching machine at one speed.

The bielastic fabric thus obtained has a weight of 195 g/sqml, 60% in the weft. It has 50% flexibility in flexibility and warp. Weight measurement is a diameter of 11 cm. by taking the circumference of a fabric that has has been obtained. Instead, the flexibility is the result of 12 cm long strips of fabric. by taking them and placing them on a Zwick/Roell Z0.5 dynamometer. has been measured.

Claims (1)

REQUESTS It is a process of producing a bielastic fabric containing biopolyamide yarn and elastic yarn, said fabric weighing 100-250 g/sqms, the weft comprising the following steps: a) knitting the biopolyamide yarn and elastane yarn to obtain a fabric, and b) in less than 100 seconds heat-curing the fabric in question in hot air at a temperature of not more than 160°C for a period of not longer. The process of claim 1, wherein heat curing step b) is performed over a period of 30-70 seconds. . The process of claim 1 or 2, wherein the thermosetting step b) is carried out at a temperature of 100-160°C, more preferably 120-160°C. The process of any one of claims 1-3, further comprising a step c) of dyeing the heat-cured fabric, wherein the dyeing step c) comprises the following sub-steps: wash at 90°C, neutralization of the wash throughout, preferably for 30 minutes continuous dyeing at 98°C for 24 minutes with dye dosage, stripping, treatment with a fixative and vi) final cold wash. It is a heat cured knitted fabric containing polyamide yarn and elastane yarn, the fabric in question has a weight of 100-250 g/sqm, 40-200% elasticity in the weft and 30-200% elasticity in the warp, the fabric in question has a resilience of not more than 100 seconds. It is characterized in that it can be heat-cured in hot air at a temperature of not more than 160°C for a period of time and that the said polyamide yarn is a biopolyamide yarn. The bielastic fabric of claim 5, comprising at least 5% of spandex thread, preferably at least 151% of elastane thread. The bielastic fabric of claim 5 or 6 comprising at least 60° of biopolyamide thread, more preferably at least 70% of biopolyamide thread. . Bielastic fabric of any one of claims 5-7, wherein said has. Bielastic fabric of any one of claims 5-8, wherein said has. Bielastic fabric of any of claims 5-9, comprising at least 60% of biopolyamide yarn and at least 51% of elastane yarn. Bielastic fabric of any of Claims 5-10, with jersey knit or interlock knit. Bielastic fabric of any of claims 5-11, containing at least 70% of biopolyamide thread and 15% of elastane thread and jersey stitch, 180- stretch or at least 70% of biopolyamide thread and 15% of elastane thread and the jersey stitch, a weight of 100-140 g/sqmSII, contains at least 70% of the biopolyamide yarn in the weft and 15% of the elastane yarn, and has 50-100% elasticity in the warp. Bielastic fabric of any of claims 5-129, containing at least 80-90% of biopolyamide yarn and 10-20% of elastane yarn, and jersey containing 70-80% of biopolyamide yarn and 20-30% of elastane yarn and has 60-90% flexibility in warp. It is an article of clothing or furniture made at least partially from the bielastic fabric of any one of claims 5-13.