MXPA98002938A - Textile material as a support for coagulation and the product obtained through the resin coagulation on such sopo - Google Patents

Abstract

A textile material is described as a support for coagulation which is formed of machinery comprising 8 to 10 threads per centimeter of polyester and a machinery comprising 12 to 16 threads per centimeter of cotton, it is used as a support for coagulation and the coagulated product obtainable through the coagulation of polyurethane resins on such sopor

Description

TEXTILE MATERIAL AS A SUPPORT FOR COAGULATION AND THE PRODUCT OBTAINED THROUGH THE COAGULATION ON SUCH SUPPORT DESCRIPTION OF THE INVENTION On behalf of: COATEX S.r.l. of nationality: Italian domiciled in: Burago di Molgora (Milano), Italy The present invention relates to a textile material that functions as a support for coagulation, and to the product obtainable through the polyurethane resins on said support. In the state of the art, several supports are indicated that can be subjected to a coagulation process which, by using particles of polyurethane resins, make it possible to obtain an artificial skin product. In fact, the main objective is obtain a product that can replace natural skin in all its applications, with similar aesthetic and qualitative characteristics, but at a lower cost. However, the products obtained from According to the aforementioned technique, they have precise use limitations that do not allow completely replacing the natural skin. Particular mention is not made of the textile supports that allow, through the coagulation technique, to obtain a coagulated product with a thickness greater than 16-18 / 10 mm. The above makes it clear that a product is obtained that does not have the same characteristics of softness and resistance as natural skin. The product of the present invention allows to overcome the drawbacks that characterize the existing products and in particular allows to obtain a coagulated product of more thickness. The object of the present invention is a particularly suitable textile material for the continuous preparation of the coagulation support for the resins, characterized in that it consists of a machinery comprising 8 to 10 threads per centimeter of polyester, such threads have a thickness of 12/5 and a yarn tension value TPM (torsion turns per meter) ranging from 200 to 220, and a screen comprising 12 to 16 threads per centimeter of cotton; such yarns have a thickness of 12/6 and a yarn twist value T.P.M. ranging from 130 to 160, such textile material is characterized by having a thickness between 1.38 mm and 1.53 mm. Such a textile material preferably has a yarn for making with a twist value of 5 yarn T.P.M. equal to 207 and a weft yarn with a yarn twist value T.P.M. equal to 157.48. The object of the present invention is < Also, the use of the textile material according to the present invention as a textile support for coagulation. The successive object of the present invention is the product obtainable by coagulation treatment with solutions based on polyurethane resins having a content of polyurethane between 25% to 38%. Particularly, the products obtainable through the coagulation of said polyurethane support resins for coagulation according to the present invention present a thickness between 2.1 and 2.3 mm. The main advantage of the product according to the present invention consists in the fact that the product obtained by impregnation and coagulation of the textile support with macroresins tannic polyuretics and subsequent finishes based on tannic polyurethane resins is characterized by a high degree of water and body vapor transparency, high water resistance, excellent resistance to solvents and the phenomena of accelerated aging (hydrolysis) that can cause the chemical agents, raise the characteristics of oil repellency and of ^^. antisuciedad. The characteristics and advantages of The product according to the present invention will be more comprehensible after the following detailed description and example. Particularly, with reference. to the elaboration called "double panama", the present The invention relates to a support for coagulation that has a thickness of between 1.47 mm. Y 1. 53 mm. , and is made up of machinery comprising 8 to 10 threads per centimeter with a thickness of 12/5 polyester, with torsion values of yarn T.P.I. (twist turns per inch) equal to 5.25 and yarn twist values T.P.M. (torsion turns per meter) equal to 207, with a tensile breaking load value of polyester yarn of 4100 g, and with an elongation of rupture of the 33% polyester yarn and a weft consisting of 14 to 16 yarns per centimeter, with a percentage of 12/6 cotton having a twist yarn value of T.P.I. equal to 4 and a yarn twist value T.P.M. equal to 157.48, with a tensile rupture load value of cotton yarn of 3000 g, and with 10% cotton yarn breaking elongation. Such support, as mentioned above, presents an armor design called "double panama ", which is shown in figure 1, and which has a weight of 700 g per m2 ± 5% and is constituted by cotton between 65% and 73% and from 35% to 27% of polyester, such support has the following values means of mechanical characteristics: Breakthrough traction: machinery 300kg / 5cm ± 10 frame from 140 to 180kg / 5cm ± 10% 20 elongation at breakdown machinery 30% ± 5% weft 20% ± 5% laceration (Kg.-F) machinery 110 + 5% weft 70 + 5% Furthermore, with reference to the elaboration that is correctly called "spina 3: 1", the present invention relates to a new support for coagulation, which has a thickness between 1.38 mm and 1.42 mm. and it is constituted of a machinery comprising from 8 to 10 threads per centimeter with a 12/5 polyester percentage, with yarn torsion values T.P.I (twist turns per inch) equal to 5.25, and yarn twist values T.P.M. (twist turns per meter) equal to 207 with a breaking load value and polyester spin pull of 4100 g, and with a breaking elongation of the polyester yarn of 33% and a weft comprising 12 to 14 yarns per centimeter, with a percentage of 12 / 6 of cotton having a yarn torsion value TPI equal to 4, yarn twist value T.P.M. equal 157.48, with a tensile rupture value of cotton yarn of 3000 g, and with a 10% cotton yarn breaking elongation. Such a support has a design, as mentioned above, called "spina 3: 1" which is observed in figure 2, and which has a weight of 650 g to m2 ± 5% and is constituted between 61% and the 71% cotton and between 39% and 29% polyester.

In particular, the supports described above are made at industrial altitudes of 150 cm. and 180 cm., and in this way they are subjected to the coagulation treatment with polyurethane solutions. Such supports have the advantage that, having a natural composition in their majority, they allow a high absorption of the solutions in treatment. The polyurethane solutions that are used in the coagulation of the support, which are described later, were chosen according to the characteristics of the product to be obtained, using polyurethanes called Vithane 182, Vithane 160 and Vithane 168, which produces and commercializes the Morton SpA Company These are polyurethane solutions that have a very high viscosity and contain a dry substance (polyurethane) between 25% and 38%. This is how the three base solutions are prepared, which contain the Vithane 182, 160 and 168 polyurethane resins.

Type A solution (obtained from the base Vithane 182), dosed at 25% dry substance (polyurethane), has the following characteristics: Brookfield viscosity at 25 ° C = 100 - 150 Pa. s Flash point = 58 ° C solvent = DMF; and the following mechanical properties of the obtained polyurethane layer: 100% modulus = 260 kg / cm2; module 300% = 130 kg / cm2; Burst load = 500 to 570 kg / cm% elongation at break = 290 to 500%. and the following final properties after the evaporation of the solvents of the solution: optimum resistance to absorption, to solvents, exceptional resistance to hydrolysis and to high viscosity. Solutions B and C (obtained from the bases Vithane 160 and Vithane 168), contain 38% dry substance (polyurethane), has the following characteristics: Brookfield viscosity at 25 ° C = 30-50 Pa. s Flash point = 58 ° C; solvent = DMF and the following mechanical properties of the polyurethane layer obtained: modulus 100% = 40 kg / cm2 modulus 300% = 60 kg / cm2 rupture load = 250 kg / cm% elongation at break = 800% and the following final properties after evaporation of the solvents from the solution: excellent resistance to hydrolysis, at repeated push-ups at very low temperature and very high elasticity. The formulas of such solutions, researched and developed by the applicant and used in the coagulation production process are as follows: Formula (A ') comprises 80% by weight of DMF, 18% of Vithane 182 and, as an additive, 2% of Vithane 162 (commercial product of Morton S.p.A ..); all percentages are by weight, referred to 100 kg of total mix. The percentage of dry substance (polyurethane) contained is 6%. The formula (B ') comprises 40% by weight of DMF, 5% of H20, 50% of Vithane 168, 1% of Vithane 162 (commercial product of Morton S.p.A.), 0.5% of Vithane S-10 (commercial product # of Morton S.p.A.), 1 to 3% of Vithane 160 and 2 to 5% of microcellulose; all percentages are by weight, referred to 100 kg. of total mix. Formula (C) comprises 36% by weight of 5 DMF, 5% of H20, 1% of Vithane 162 (commercial product of Morton SpA), 0.3% of Vithané CF (commercial product of Morton SpA) , 0.6% of Vithane S-10 (commercial product of Morton SpA), from 10 to 20% of Vithane 168, 10% of Vithane 160 and 2 to 5% microcellulose; all the percentages are the weight, referred to 100 kg. of total weight. The formulas (B ') and (C') contain a percentage of dry substance (polyurethane resin) of 20%. In particular, the support for coagulation, according to the present invention, made in industrial signs and placed in suitable carts to carry out an elaboration constant, it is placed at the beginning of a coagulation installation. According to the classic coagulation process, a polyurethane solution with a formula of type (A ') passes continuously in this way, in a continuous first bucket, as previously defined, for a first phase of pre-impregnation of support. The pre-impregnated support protrudes once the solution of polyurethane resin present in the bath is absorbed, according to the established formula. The support in this first phase is coated either in the weft or in the machinery, and an exact, reproducible amount of polyurethane resin in solution (wet phase) forming a single body that has a smooth appearance. The pre-impregnated support is presented in the second stage of manufacture, in which, by means of a steel sheet, a polyurethane solution is applied to the prepreg in accordance with the formulas (B ") 0 (C). The new thickness of The wet substance is homogenized with the prepreg support and forms the sole support. Such a coagulation technology is defined as "wet on wet" and provides the coagulated product more homogeneous and compact in relation to the other coagulation techniques of conventional type. The fabric impregnated and smeared with polyurethane resins is sent to the coagulation bucket, which has a water / DMF concentration and a temperature preset and regulated constantly with electronic control devices, in order to obtain a product with constant and reproducible characteristics. The coating coagulation process of the support is carried out inside the bucket; the polyurethane resins are solidified, the DMF remains in the solution and the wet tissue, due to the presence of water in the DMF residues, is treated by a new passage in a suction station and subsequent drying oven.

The coagulated product leaving the oven has a solid and compact surface. When the coagulated product is obtained from a coagulation support according to the present invention of the "double panama" type if is impregnated and coagulated with the wet-on-wet technique, the following final characteristics are presented: total weight of the coagulated tissue: 1000 g / m2 ± 5% thickness: between 2.10 and 2.30 mm; 20 composition on dry basis: support between 60 and 70% coagulated polyurethane resins of between 30 and 40%; such a coagulated product has an absorption capacity of solutions or water equal to twice its weight or mass per square meter, and is carried out with the formulas of type (A '), (B7) or (C'), according to the sector to which it is intended. When instead of the coagulated product being obtained from the coagulation support according to the present invention of the "spina 3: 1" type, it is impregnated and coagulated by the wet-on-wet technique, it has the following characteristics: total weight of the coagulated fabric: 950 g / m2 ± 5% thickness: between 1.90 and 2.10 mm; composition on dry basis: support between 65% and 75%; coagulated polyurethane resins of between 25 and 35%; such a coagulated product has an absorption capacity of solutions or water equal to 2.5 times its weight or mass per square meter. In particular, the coagulated product obtained in this way can be used in various industrial sectors, directly after other treatments to spread the appropriate polyurethane resins. The coagulated product is used as an absorbent / transparent instep according to the present invention, having characteristics of oleohydrorepedancy in the sector of sports footwear and of recreational activities (golf, horse riding, orthopedics, etc.). The coagulated product used for this purpose presents a thickness between 1.90 to 2.10 mm. and a weight between 900 and 1000 g / m2. Such a coagulated product can also be used as an external covering to cover chairs or similar objects, in the sector of decoration of industrial coatings (automobiles, industrial vehicles, trains, airplanes, etc.), having characteristics of transpiration, antisuciedad and resistance to hydrolysis. The coagulated product that is used for each objective has a thickness of between 2 mm ± 5% and a weight of 900 g / m2 ± 5%. All the aforementioned products can be subjected to refinement treatments that give them the desired color and appearance in relation to the final application.

J (The main advantage of the support according to the present invention, as noted above, consists of the possibility of obtaining a coagulated product of high thickness, characterized by a high degree of transparency to steam, aqueous and corporeal, a high impermeability to water, optimal resistance to solvents and accelerated aging phenomena (hydrolysis), which can be caused by chemical agents, high characteristics of oil repellency and anti - dirt.

Claims (22)

1. Textile material, particularly adapted for the continuous preparation of the coagulation support for the resins, characterized in that it consists of machinery comprising between 8 to 10 threads per centimeter of polyester, such machining threads have a thickness of 12. / 5 and a yarn torque value TPM (twist turns per meter) of between 200 and 220 and of a weft comprising 12 to 16 threads per centimeter of cotton; such weft yarns have a thickness of 12/6 and a yarn twist value T.P.M. between 130 and 160; Such textile material is characterized by having a thickness between 1.38 mm and 1.53 mm.

2. Textile material according to claim 1, characterized in that the yarn has a spin yarn value T.P.M. equal to 207 and a weft yarn, with a yarn twist value T.P.M. equal to 157.48.

3. Textile material according to one of the preceding claims, characterized in that the thickness comprises between 1.47 mm. and 1.53 mm. , and the plot comprises 14 to 16 cotton threads per centimeter.

4. Textile material according to one of the preceding claims, characterized by the fact that the polyester spun yarn has a tensile tensile load value of * 4100 g, and a rupture elongation of 33%, and the 10 yarn of cotton weft has a tensile rupture pattern of 3000 g, and a rupture elongation of 10%.

5. Textile material according to one of the preceding claims, characterized by having assembly designs called "double * panama ", a weight of 700g per m2 ± 5% and because it consists of cotton between 65% and 73% and between 35% and 27% polyester 20

6. Textile material according to claims 1 and / or 2, characterized in that the thickness is between 1.38 mm and 1.42 mm, and the weft comprises 12 to 14 cotton threads per 25 centíme ro.

7. Textile material according to claim 6, characterized by having a design called "spina 3: 1", with a weight of 650 g per m2 ± 5% and to be constituted between 61% 5 and 71% cotton and between 39% and 29% polyester.

8. Use of the textile material according to one of the preceding claims as a textile support for a coagulation process.

9. The coagulated product obtained by the wet-on-wet coagulation of polyurethane resins having a content of between 15 25% and 38% polyurethane in the textile support according to one of the preceding claims.

10. Coagulated product according to claim 9, characterized by having a thickness between 2.1 and 2.3 mm.

11. Coagulated product according to claim 9, characterized in that it has a total weight of coagulated tissue equal to 1000 g / m2 + 5% 25 and a thickness between 2.10 and 2.30 m.

12. Coagulated product according to claim 11, characterized by having a dry base composition constituted by a percentage of between 60 and 70% of textile support and a percentage of between 30 and 40% of coagulated single polyure resins.

13. Coagulated product according to claim 11, characterized by having an absorption capacity of solutions or water equal to twice its weight or mass per square meter.

14. Coagulated product according to claim 9, characterized in that it has a total weight of the coagulated fabric equal to 950 g / m2 ± 5% and a thickness of 1.90 to 2.10 mm.

15. Coagulated product according to claim 14, characterized by having a dry base composition constituted from a 65 to a 75% textile support and 25 to 35% coagulated polyurethane resins.

16. Coagulated product according to claim 14, characterized by having an absorption capacity of solutions or water equal to 2.5 times its weight or mass per square meter.

17. Coagulated product according to claim 9, characterized by having a thickness between 2.00 and 2.20 m. and a weight between 900 and 1000 g / m2

# 18. Coagulated product according to claim 9, characterized by having a thickness between 1.90 and 2.10 mm. and a weight between 900 and 1000 g / m2.

19. Coagulated product according to the rei indication 9, characterized by having a thickness of 2 mm. ± 5% and a weight of 900 g / m2 ± 5%.

20. Use of the coagulated product according to one of the claims from 9 to 19, 20 as instep translucen e / absorb e. with hydro-oil characteristics in the footwear industry.

21. Use of the coagulated product according to one of claims 9 to 19, as a transparent and waterproof instep with characteristics of hydro-repellency in the field of sports footwear and recreational activities.

22. Use of the coagulated product according to one of claims 9 to 19, as an external coating for the coating of chairs or the like in the decoration sector and of industrial coatings (auto-vans, industrial vehicles, trains, aircraft, etc. .) with characteristics of transpiration, antisuciedad and resistance to hydrolysis.