Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
  • D06M15/03—Polysaccharides or derivatives thereof
  • D06M15/11—Starch or derivatives thereof

Definitions

• the object of the present invention is the use of amylopectin potato starch as a fiber processing agent for use in manufacturing or aftertreatment of woven and knitted fabrics, which means on the The basis of microbiologically produced potato starch and, if necessary, a mixture with additives known per se for this purpose.
• Textile fiber treatment agents therefore in the manufacture or after-treatment of fabrics and knitted fabrics used.
• Sizing agents for Textile materials as well as binding agents, finishing agents or impregnating agents for carpets, textile wallpapers and fabric mats various natural or artificial fibers, such as cellulose fibers, Hemp or linen fibers, glass fibers, plastic fibers or carbon fibers.
• the list of fibers is only exemplary and not restrictive.
• textile fiber treatment agent in the sense
• the present invention includes agents used in papermaking or used for paper aftertreatment.
• starch products in particular Products based on potato starch, corn starch, waxy corn starch and derivatives thereof, for the treatment of fiber materials during processing of the same or afterwards to use on it.
• Starch is a natural vegetable product. It essentially exists from a glucose polymer, which in the case of potato starch also a small amount of phosphoric acid in ester bond contains. Depending on the starting plant, the strength is one quantitative composition of two components , namely of amylose and amylopectin. Amylose and In turn, amylopectin are not uniform substances, but are mixtures of different polymers Molecular weights. Amylose essentially consists of unbranched polysaccharides in which the glucose is in alpha-1,4 bond is present. It lies in the natural starch grains the amylose usually in front of the grain. To this The core of amylose is the amylopectin. This is in turn a highly branched glucose polymer in which the Glucose units next to the alpha-1,4 bonds at the branching points contained in 1,6 bond.
• Natural starches usually have an amylose content of 15% to 30%, regardless of the type of plant from which it is obtained become.
• Waxy type corn varieties deliver one Starch that consists almost entirely of amylopectin.
• the Field of application of this starch the so-called waxy corn starch, is mainly in the food sector.
• this Amylose-free starch in gelatinization in much less Dimensions pulls threads and less retrogradation symptoms has an amylose-rich starch.
• the food made with waxy corn starch is an improved one Mouthfeel as well as improved texture and storage stability achieved in relation to products with normal strength.
• the waxy maize starch so far hardly enforced due to its relatively high price.
• EP-A1 0 703 314 describes the use of amylopectin potato starch in cationic form as mass starch in papermaking proposed.
• the amylopectin starch becomes preferably obtained from genetically modified potatoes.
• amylopectin starch made from gene transformed Potatoes is extracted except in this field of paper production in the non-food sector is nowhere known.
• the present invention is now concerned with a new one Area of application for amylopectin potato starch, in which the favorable properties of this starch for special product advantages to lead.
• the new textile fiber treatment agents are therefore according to the invention characterized in that for their manufacture used potato starch from an amylopectin potato starch, i.e. a potato starch with compared to usual Potato starch with a reduced amylose content.
• the new textile fiber treatment agents show not only significantly better properties compared to Means based on standard potato starch, but there are also the textile products obtained with it in many ways improved and the production of new funds offers in ecological and economically numerous advantages. It is favorable if the potato starch used has an amylose content from less than 20%, preferably from 0% to 8%, in particular from 0% to 5%.
• the use of such fiber treatment agents in textile sizing applies primarily to the sizing of warp yarns.
• the agent mostly serves as an additive in warp yarn preparation or for use as a smoothing and reinforcing agent the warp thread or to increase the abrasion resistance in the weaving process.
• starch products are based Sago, corn or potato starch, for at least 50 years common.
• the quality of these starch products was sufficient for machines.
• the evolving textile industry, the development of new Yarns and yarn types, opening up and moving new markets and the legal requirements are the breeding ground for the Development of new products.
• the requirements for sizing agents are varied. So e.g. running properties of the yarn are expected that have a thread break number less depending on substrate and weaving machine guarantee as 0.1 / 100,000 shots.
• Starch products for the textile industry need to be tight Seen in connection with the shear sensitivity of the products become.
• Conventional starch derivatives are therefore used during the Manufactured by introducing cross-linkable substances modified and made shear stable.
• amylopectin potato starch as the starting material for textile sizing now offers one option, the one above largely solve the problems mentioned. It turned out that the amylopectin starch grain is significantly more stable than is the common grain of starch. Many properties at the Processing and when using the amylopectin starch depend on this increased grain stability together. For example, surprisingly the amylopectin starch is 5 ° C higher Gelatinization temperature, which causes reactions in the slurry and thus products with a higher conversion rate (substitution) or very high purity can be produced.
• the starch in modified or derivatized form, as used as ether or ester.
• derivatization is in the present context according to usual practice esterification, etherification and possibly crosslinking, however not understood graft polymer formation.
• amylopectin starch In the derivatization of starch, the above-mentioned causes higher Grain stability of amylopectin simplifies manufacturing technology.
• the amylopectin starch is less alkaline and less sensitive to temperature than the amylose Strength.
• the conventional etherification and esterification reactions can thereby intensify with shorter reaction times and the use of gelatinization protection salts can clearly be reduced.
• the salt loads and the COD pollution of the reaction waste water is noticeably lower, on the other hand, the use of ecologically questionable Cross-linking reagents, e.g. Epichlorohydrin, partially or to be completely dispensed with.
• the starch is preferably a reaction product of an esterification with mono-, di- or tricarboxylic acids with an alkyl chain with 1 to 30 carbon atoms or as a carbamate.
• Starch ethers are also particularly favorable starch derivatives, such as methyl, ethyl, hydroxyethyl, hydroxypropyl, Hydroxybutyl, carboxymethyl, cyanoethyl, carbamoyl ethyl ether, or mixtures thereof. Excellent results have been e.g. achieved with hydroxypropyl starch.
• the starch is often also made up of acids, oxidizing agents, Shear forces or enzymatic processes are reduced.
• the starch products for textile fiber treatment agents are in granular form or they are preferred as modified, namely cold water swellable or cold soluble products used.
• Processes such as extrusion, Roller or spray drying u. ⁇ ., used, which already have been state of the art for some time.
• the gelatinization or the digestion of granular starch by means of Drum drying in a thin film is one of the most common Method.
• the influence of temperature and Shear forces either unlocked the strength or a paste that has already been digested is dried. In both In some cases, roller drying causes a more extensive process Dissolution of the native strength structures.
• the correct degree of digestion is of great importance.
• amylopectin potato starch also has properties that the previously known amylopectin starches from waxy corn do not have.
• the adhesive strength of the amylopectin potato starch paste is about 20% higher.
• the viscosity values are around 50% higher.
• the values for the maximum tractive effort are also around 40% higher.
• the improved adhesive strength in connection with the favorable viscosity behavior leads, especially in the field of textile sizing, positive changes in abrasion behavior, reduced tendency to form staples, reduced abrasion and hairiness of the finished Warp yarns.
• the clarity of the amylopectin potato starch paste is higher and there is less tendency to Retrogradation (remains for 3 h at room temperature without a tendency to gel or gel formation).
• the storage stability the paste is surprisingly high. At room temperature takes the viscosity of an amylopectin starch paste after 7 days only by a maximum of 10%.
• amylopectin potato starch extremely interesting in textile sizing.
• the invention relates in any case to that Use of the amylopectin potato starch or its depolymerized and / or derivatized forms as part of a Textile sizing agent.
• Textile sizing agents are also within the scope of the present invention itself, which is a textile fiber treatment agent mentioned above in combination with those known per se for this purpose contain organic polymers and / or size grease.
• Another area of textile fiber treatment is, as mentioned, the treatment of fabric mats, carpets, textile wallpapers and The like.
• starch-based binders In the preparation of These products are generally used in the finishing or impregnation fleets Binder added to the products mentioned to give appropriate strengths.
• Binder natural polymers can e.g. based on proteins, Polysaccharides or resins can be built up.
• binders In order to give the fiber materials the necessary properties, that ensure their quick and efficient processing, The properties of the binders are often not sufficient out. Aside from the numerous physical modifications or chemical nature of the respective polymers often for "in situ" crosslinking of the binders on the fabrics or gripped mats.
• Crosslinking agents are used different reactivity, e.g. Resins from Reaction products of nitrogen compounds with compounds from the aldehyde group, the one or more functional aldehyde groups included, exist. Most of all, products are made from Urea, melamine or nitrogen-containing heterocycles, such as e.g. Ethylene urea and formaldehyde or glyoxal are used.
• crosslinking agents are based on inorganic compounds, to react with the functional groups of the binders are qualified, e.g. Salts of polyvalent cations or Anions. Most recently, silicates have been used or zirconium salts used.
• the present invention is also in use of the above, preferably depolymerized and / or derivatized Amylopectin potato starch as part of a Textile binder, in which, if necessary, additionally known polymer dispersions, water repellents for this purpose and / or crosslinking agents are included.
• the potato starch derivatives due to their high specific adhesive strength that is not achieved by other types of starch becomes particularly important as a binder.
• the special structure of the potato starch grain ensures high adhesive strength causes, i.e. the stability of the starch grain can the effectiveness, especially the binding power of the starch products, influence. Since the amylopectin potato starch grain, as mentioned, has a very excellent stability, recommends the use of amylopectin potato starch particular measure.
• Flow behavior suitable for the finishing fleets or corresponding ones Giving rheology are the strengths or theirs Derivatives in their degree of decomposition from weakly cold swelling up to modified very well soluble in cold, since it has been shown that the Degree of disintegration of starch the rheology of the fleets essential can influence or control.
• finishing fleet also depend strongly with the rheology of the fleets. Order, machine running speed, Handle of the impregnated product, shear stability the fleet, storage stability, wet strength and The hydrophobicity of the products is therefore closely related with the type of starch used or the starch derivative.
• the finishing fleet Due to the requirements for processing properties the finishing fleet is the maximum possible degree of digestion limited because the flow behavior of highly digested starches the finishing fleets are no longer suitable for processing. Therefore, the possible degree of disintegration of the strengths is usually by pre-crosslinking with the known crosslinking reagents, such as. Epichlorohydrin, trimetaphosphate or phosphorus oxychloride, limited.
• a potato starch or derivatives of the same without pre-crosslinking enable constant degrees of digestion and thereby an important one have a larger number of hydrated hydroxyl groups, give the finishing liquors a suitable rheology and therefore represent an optimal binder for production of fiber mats or fiber wallpapers or carpets
• Amylopectin potato starch is one such beneficial one Starch raw material that eliminates the need for pre-crosslinking makes.
• the amylopectin molecules are in the hydrated form maximum open minded, but bring about excellent Flow properties of the finishing liquors.
• the properties achieved the textile fiber wallpapers or fabric mats produced with it are at the same amount used significantly above Standard values with conventional potato starches. Moreover allows a reduction in the quantities used in the finishing fleet a significant reduction in manufacturing costs. on the other hand can use the same amount of starch product Amounts of crosslinking agent used with the same properties the impregnated fabric can be significantly reduced.
• the wet strengths are the same and water repellency values a much softer Get a handle of the treated wallpaper, mats and the like.
• the textile fiber treatment agents according to the invention mostly have a 20 to 30% reduction in the amount of amylopectin starch used in relation to normal potato starch.
• finishing fleets turn out to be more than usual also stable in storage and do not tend to thicken, as is the case with conventional formulations is the case.
• the following table shows the properties of the impregnated glass fiber wallpaper depending on the recipe: binder recipe Wet strength [g] 1 Hydrophobia [cm] 2 Standard starch derivative 1 1450 g 2.5 cm Amylopectin Kart.st. derivative 2 1480 g 2 cm Amylopectin Kart.st.derivat 3 1510 g 2.5 cm
• the wet strength was determined after a swelling time of 1 minute in deionized the tensile force determined to break the Connection of warp and weft leads.
• the traction is given in grams of traction.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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• 1996
  • 1996-08-01 AT AT137796A patent/AT408996B/de not_active IP Right Cessation
• 1997
  • 1997-07-08 ES ES97890128T patent/ES2214602T3/es not_active Expired - Lifetime
  • 1997-07-08 DE DE59711287T patent/DE59711287D1/de not_active Expired - Lifetime
  • 1997-07-08 EP EP19970890128 patent/EP0822287B1/de not_active Expired - Lifetime
  • 1997-07-08 DK DK97890128T patent/DK0822287T3/da active
  • 1997-07-08 PT PT97890128T patent/PT822287E/pt unknown

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