DE2342149A1 - HEAT SEALING OF TEXTILES WITH POLYURETHANES - Google Patents

Description

Heat sealing of textiles with polyurethanes

The present invention relates to the use of special polyurethanes and polyurethane-ureas for short-term fixation of textile fabrics.

It is known to use thermoplastics for the heat sealing of textile fabrics. The thermoplastics are thereby in solid form as a powder with certain Grain sizes, in fiber form, as woven or fleece, as viscous aqueous suspension or dispersion or in dissolved form as viscous pastes applied to the textile surface, dried with the help of a heat source and sintered on and on another piece of tissue is ironed onto the surface prepared in this way.

The development in the field of the heat sealing of textile fabrics is moving towards the use of heat sealing compounds which can be ironed in a short time under low pressure and at low temperatures with the formation of maximum adhesive strength. There is therefore a market need for products which can be sealed in less than 10 seconds ^{at temperatures below 150 ° C.}

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For this purpose, heat seal adhesives made of polyethylene, PVC, polyamides or polyvinyl acetate-polyethylene copolymers have been used with a melting point of 100-120 ° C
is and their melt viscosity is set so that it sufficiently even at an ironing temperature above 120 ⁰ C.
Have elasticity and adhesiveness, so that a wide
Ironing plateau is reached and short cycle times can be maintained when ironing the finished textile.

The main disadvantage of these heat seal adhesives lies in their
low resistance to detergents and the solvents used in dry cleaning. Efforts were therefore made to replace these materials with polyurethanes, which are much more resistant in this regard. However, all of them own
Polyurethane hot-seal adhesives used up to now have an unfavorable melting behavior. Thus, for example, the published patent applications from the German no. 1,915,803, 1,930,340 and 1,769 known heat-sealable polyurethanes no kurzzeitfixierbaren heat seal adhesive because they have melting points of about 120 ⁰ C, so that it at temperatures above 15O ⁰ C and a pressure of 0.5 - 0.7 kg / cm and times over 10 seconds must be ironed.

So far it has been found that plasticizers are added to the heat-sealing compounds or the softening and sticking points of the polyurethanes are reduced by other additives. However, all of these tools have the disadvantage that they are used in maintenance processes, in particular dry cleaning or
Laundry, are removed and the washing liquor or the cleaning bath soiling. On the other hand, they can have an offensive odor, can migrate and, for example, when using interlining nonwovens, have a negative impact on the cohesion of the synthetic resin used to bind the nonwoven.
The migration can also have a negative visual effect on the side of the outer material facing away from the adhesive layer - i.e. the actual upper side of the article.

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From DOS 1 619 019, linear polyurethanes which have been adjusted to be soft and are characterized by low softening points and sealing temperatures are also known for the heat sealing of textiles. Although these heat-seal adhesive melts in the range of 100 to 120 ⁰ C, but they have too low melt viscosity and have an unfavorable Theological behavior in the melt. The heat seal adhesives according to DOS 1 619 019 melt sharply within a small melting interval and flow because of the low

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Melt viscosity quickly falls into the textile base. This leads to a hardening of the textile and the achieved Adhesion strengths are moderate and often inadequate. Because of this unfavorable theological behavior, the Products are technologically difficult to handle because of the slight deviations from the sintering and ironing temperatures the adhesive strength of the sealed textile fabrics affect.

It has now been found that polyurethanes and polyurethane-ureas with a melting range of 100-12O ⁰ C and a melt index at ASTM 1238-62 T, condition B of 10 + 5, condition C of 30 + 10 and condition E of 150 + 50 are particularly suitable for short-term fixing of textile fabrics.

Polymers of this type can be obtained by reacting higher molecular weight compounds, which preferably have 2, optionally also several, aliphatic hydroxyl groups, a molecular weight of 1000-2500 and a melting point between 25 and 130 ° C, with polyisocyanates and optionally aliphatic polyols and / or polyamines with a Molecular weight up to 400 can be produced. The amount of the higher molecular weight polyhydroxy compound is 55-95% by weight, preferably 75-90% by weight, based on the polyurethane solids, the amount of chain extender 0-15% by weight and the ratio NC0 / (OH + NH ₂ ) between 0.9 and 1.05, preferably between 0.95 and 0.99.

The invention thus relates to the use of polyurethanes and polyurethane ureas that are made from

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BATH ORIGINAL

a) 55-95% by weight, based on the total polyurethane mass, of compounds with at least 2 aliphatic hydroxyl groups, a molecular weight between 1000 and 2500 and a melting point between 25 and 130 ^° C.,

b) polyisocyanates and

c) 0 to 15% by weight, based on the total polyurethane composition aliphatic polyols and / or polyamines

with an equivalent ratio of 0.9 to 1.05

a + c

for the short-term fixation of textile fabrics.

Those to be used in the manufacture of the invention Polyurethane (urea) s used higher molecular weight compounds can be produced by polycondensation or polymerization. For example, polyesters are possible, Polyacetals, polyethers, polyamides, polyesteramides, polycarbonates and polylactones.

The polyesters, polyester amides and polyamides include those composed of polyvalent, preferably divalent, saturated and / or unsaturated carboxylic acids and polybasic, preferably dihydric, saturated and / or unsaturated alcohols, Amino alcohols, diamines, polyamines and their mixtures produced polycondensates. Suitable polyacetals are, for example the compounds that can be prepared from 1,6-hexanediol and formaldehyde,

Examples of polyethers are the polymerization products of ethylene oxide, propylene oxide, tetrahydrofuran and butylene oxide, as well as their mixed or graft polymerisation products, as well as those caused by the condensation of polyhydric alcohols,

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Polyethers obtained from amines, polyamines and amino alcohols called.

Suitable polylactones are the polyesters produced by the polymerization of lactones, in particular ^ -caprolactone. Suitable polycarbonates can be made, for example, from glycols and polyols such as hexanediol or trimethylolpropane Diphenyl carbonate can be produced by transesterification.

As polyols with aliphatically bonded hydroxyl groups, which have a molecular weight of up to 400, come for example Ethylene glycol, 1,3-propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, methyl-1,6-hexanediol, trimethyl-hexanediol, Neopentyl glycol, 1,4-bis-hydroxymethylcyclohexane, Diethylene glycol, thiodiglycol, methyldiethanolamine, xylylene glycol, hexanetriol- (1,2,6) and oxethylation products of dihydric phenols and glycols such as bis-hydroxyäthy! hydroquinone or hydroxyethyl-1,6-hexanediol in question.

Suitable aliphatic polyamines with a molecular weight of up to 400 are e.g. ethylenediamine, diethylenetriamine, 1,2-diamino-propane, 1,4-diaminobutane, 1,3-diaminobutane, hexamethylenediamine, N, N'-diethyl-1,3-propanediamine, N, N'-dibutyl-1,6-hexanediamine, Diaminocyclohexane, hydrazine, 4,4'-diamino-dicyclohexyl methane and 1-amino-3,3,5-trimethyl-5-aminomethyl-cyclohexane.

The polyols and polyamines with a molecular weight up to 400 are in an amount of 0-15 percent by weight, based on the entire polyurethane or polyurethane urea mass used.

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As further starting components for the production of the invention Polyurethanes and polyurethane-ureas to be used are aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic polyisocyanates are used. The equivalent ratio between the polyisocyanates and the the remaining components is 0.9-1.05, preferably 0.95-0.99.

(Cyclo) aliphatic polyisocyanates are particularly preferred such as 1,4-butane diisocyanate, 1,6-hexane diisocyanate, 2,2,4-trimethyl-1,6-hexane diisocyanate, xylylene diisocyanate, Methylcyclohexane diisocyanate, cyclohexane diisocyanate, diisocyanatocarboxylic acid ester, as described e.g. in British patents 1,072,956 and 965,474, 1-isocyanato ^^^ - trimethyl-S-isocyanatomethylcyclohexane, Biuret triisocyanates, which are made from aliphatic diisocyanates by reaction can be produced with water to form urea and biuret groups, such as the one from 1,6-hexane diisocyanate produced biuret triisocyanate

OCN- (CH _{2) 6} -NH-CO-N- (CH _{2) 6} -NGO

CO
NH

(CH ₂ ) ₆ NCO

as well as addition products of aliphatic diisocyanates with polyols with at least 3 hydroxyl groups and reaction products, obtained by addition of acrylonitrile to polyols and subsequent hydrogenation and phosgenation.

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In addition to the starting components mentioned so far, small amounts of compounds, such as those described in, for example, can also be used of DOS 1,770,068 are also used, by means of which the polyurethanes are cationically or anionically modified without the property profile determining the use changing significantly.

Examples of such compounds are chain extenders with basic nitrogen atoms, for example N-methyldiethanolamine, N-ß-hydroxyethylpiperazine or 2,6-diaminopyridine, chain extenders with halogen atoms capable of quaternization or R-S0 ₂ 0 groups such as glycerol-QG-chlorohydrin or Glycerol monotosylate and compounds which contain at least one hydrogen atom that reacts with isocyanate groups and at least one salt-like group capable of anionic salt formation, for example lactic acid, uric acid, glycine, arginine, thiodiglycolic acid, nitrilotriacetic acid, 2-hydroxyethanesulphonic acid, hydroxylamine or carboxylic acid monosulphonic acid, phosphoric acid bis containing polyesters.

The compounds suitable for ionic modification are mixed with the other components before or during the polyurethane or polyurethane-urea formation. Particularly A process is preferred in which pre-adducts of the polyisocyanates and the polyhydroxy compounds, so-called NCO prepolymers, can be modified cationically or anionically by reaction with the compounds mentioned above.

The preparation of the present invention as a heat seal adhesive to be used in the polyurethanes and polyurethane-ureas of the starting components at 40, by heating - 200 ⁰ C take place in the melt. The components can also be in solution

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are reacted, using solvents which are inert to the polyisocyanates, the polyols or polyamines and the higher molecular weight polyhydroxyl compounds, such as acetone, tetrahydrofuran, dioxane, methyl ethyl ketone, benzene, toluene, xylene, methyl acetate, butyl acetate, chloroform, Carbon tetrachloride, tetrachlorethylene, trichloroethane, chlorobenzene, formamide, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, etc. The polyurethanes and polyurethane-ureas are produced, for example, in such a way that the components are dissolved in the solvent. The reaction is carried out between 40 and 200 ^° C., if appropriate under pressure and with the addition of catalysts. If the reaction product is insoluble in the solvent used, it can be filtered off with suction and dried. If, on the other hand, the polyurethane remains completely or partially in solution, it is isolated either by distilling off the solvent or by precipitation with water or other nonsolvents which are readily or at least partially miscible with the solvent and removed from solvent residues by drying, optionally in vacuo and optionally at elevated temperature, exempted. It is also possible to first react the higher molecular weight, above 25 ° C crystallizing polyhydroxyl compound with a molecular weight of 1000-2500 with the aliphatic polyisocyanates and then to complete the reaction with the polyols or polyamines with a molecular weight of up to 400 in the presence or absence of a solvent .

# It is also possible to isolate the polyurethane or the polyurethane-urea from the solutions by spray drying, wherein the solution is atomized at elevated temperature under pressure through nozzles into a drying chamber.

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The crude product can also be granulated and crushed by grinding. Fractional sieving makes the Processing on the customary application machines, the necessary grain sizes isolated.

In general, the average grain size of the powder varies between 0.001-0.5 mm. According to the intended use and the form in which the heat sealing compounds are used, for example, grain sizes between 0.001 - 0.08 mm for viscous pastes, 0.08 - 0.2 mm used for the powder point method or 0.2 - 0.5 mm for the powder scattering method.

The application of the polyurethanes to be used according to the invention and polyurethane-ureas in thread, fabric or fleece form enables simple, targeted, uniform and economical Distribution without special devices for distributing the sealant. Loss of sealing material, such as he occasionally when using powdery! material that can arise when sprinkling is excluded in these cases.

The achievable adhesive strengths and performance properties allow a wide and varied use of the heat-sealing compounds for heat sealing of fabrics, knitted fabrics, felts and nonwovens made of natural and synthetic fibers, preferably made of cotton, rayon, wool, horsehair, polyacrylonitrile, polyamide and polyester fibers.

The seal in the textile material is resistant to washing and dry cleaning .

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The execution of the heat sealing takes place in such a way that the powdery or in thread, fleece or fabric form or Polyurethane and polyurethane-ureas present as a paste applies to the textile surface and with the help of a Heat source sinters. The energy to be used depends of the structure of the insert material to be finished, of the quantity and of the application technique.

The powders with a grain size of 0.2-0.5 mm are sprinkled evenly on the surface of the carrier material , for example a woven or a non-woven fabric, e.g.

Distributed in a quantity of about 6-30 g / m. Then the sprinkled carrier materials are about Exposed to the action of an infrared heater for 10-20 seconds. The powder begins to sinter and combine permanently with the surface of the carrier material. The material is removed from the heating zone, cooled and sent to a later Point in time with a further sheet-like structure, for example with a cotton poplin or woolen outer fabric, to form a composite united. For this purpose, the carrier material and said second material are placed on top of one another in such a way that the heat-sealing adhesive is in the middle layer between the two materials. By a heat shock of about 10 seconds Duration and applying a pressure of about

The materials are 0.3 - 0.4 kp / cm e.g. in an electric ironing press combined with one another at a temperature setting of 145 ° C. The glue becomes plastic during this period and permanently glues the carrier material and the applied material to one another. The composite is made from the electric ironing press removed and can be used immediately after cooling.

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Powders with a grain size between 0.08 and 0.2 mm are used applied by processes known in the industry as the powder point process. The edition may vary depending on

p 2

Substrate 15-30 g / m 2, 20 g / m 2 is preferred. The sealing with the outer fabric takes place under the aforementioned Ironing conditions in an electrically heated ironing press.

Hot sealing with polyurethane or polyurethane-ureas in paste form is generally done in such a way that the powder is in a grain size of 0.001-0.08 mm Weight ratio 1: 1 with water to which a thickener, for example based on polymethacrylate, is added is, stirred, adjusted to pH 7.5 with ammonia and with the help of a template, sieve drum or the like on the Carrier material evenly, preferably punctiform, on

prints, with the edition about 10-30 g / m, preferably approx.

20 g / m. The printed carrier material, for example a woven fabric or a fleece, is then ^{dried up to 160 °} C. in a drying tunnel. Here, the polyurethane particles are so firmly bonded to the carrier material that the textile webs can be rolled up without difficulty. Then another textile, for example a woven fabric, knitted fabric or fleece, is applied to the surface of the carrier printed with plastic and the bond is brought about by a heat shock under pressure, for example as indicated above in an electric ironing press. The composite material is removed from the electric ironing press and can be used immediately after cooling. Laminates produced in this way have an advantageous soft textile feel due to the even distribution of the binder.

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Fibers or flat structures made from them are a further form of application of the polyurethanes and polyurethane-ureas to be used according to the invention. Drawn with air excluded from the melt fibers, stretched, and cut into staple 200 ⁰ C - For this purpose, in known manner, for example at temperatures from about the 100th Using methods known per se, these can be used to form nonwovens, spun threads and process them into woven, knitted and non-woven fabrics. The filaments drawn and drawn from the melt can also be deposited directly into spunbonded nonwovens using known methods. To heat-seal textiles, these flat structures are applied to the carrier material and either sintered for the purpose of later ironing or ironed directly with a second material, e.g. a knitted fabric, woven fabric or fleece made of materials that are not thermoplastic at the processing temperatures, by means of a heat shock under pressure. Ironing presses and calenders are suitable for this purpose. This process also produces soft composite materials that are characterized by good resistance to the action of water and solvents.

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Examples of polyurethane A )

Recipe: 86.3 parts by weight of a polyester made from adipic acid and

1,4-butanediol, OH number 50 (molecular weight 2240)

2.6 parts by weight 1,4-butanediol

11.1 parts by weight 1,6-hexane diisocyanate

a) Preparation in solution

The dehydrated for 30 minutes at 12O ⁰ C in a water jet vacuum polyester of adipic acid and 1,4-butanediol is dissolved in tetrachlorethylene. At 100 ^° C., first the 1,6-hexane diisocyanate and then the 1,4-butanediol are added. The components are allowed to react for 5 hours at the boiling point of tetrachlorethylene. When the fully reacted mixture of polyurethane and solvent cools under the action of shear forces, such as those caused, for example, by a rapidly moving laboratory stirrer, the polyurethane is obtained as a moist powder. After the solvent has been separated off, the reaction product is dried and coarse fractions are sieved. Melting range: 110-112 ⁰ C.

ASTM 1238-62 T melt index, condition B: 12.0 ASTM 1238-62 T Melt Index Condition C: 33.6 Melt index according to ASTM 1238-62 T, condition E: 168

t>) Production in the melt

The 30 minutes at 120 ⁰ C in water trahlvakuum dewatered polyester with stirring at 100 ⁰ C with 1,6-

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Hexane diisocyanate and then 1,4-butanediol. The reaction mixture is ^{kept at 110 °} C. for 20 hours. The polyurethane obtained in this way is ground and sieved after cooling.
Melting range: 110-114 ⁰ C.

Melt index according to ASTM 1238-62 T condition B: 7.3 Melt index according to ASTM 1238-62 T condition C: 49.2 Melt index according to ASTM 1238-62 T condition E: 182 polyurethane urea B.

Recipe: 85.0 parts by weight of hexanediol polycarbonate with a molecular weight of 1870

13.5 parts by weight of hexamethylene diisocyanate

0.75 part by weight of N-methyl-diethanolamine

0.75 part by weight of dimethyl sulfate

100 parts by weight of acetone

The polycarbonate is dehydrated 30 minutes at 120 ⁰ C in a water jet vacuum and added to the hexamethylene diisocyanate at 105 ⁰ C. The mixture is kept at 100 ^° C. for 1 hour and, after cooling to 60 ^° C., the N-methyl diethanolamine in 1/11 of the total acetone is added. Man holds 3 hours at 60 ⁰ C. and a further 2.11 of acetone crowd. Then quaternize with dimethyl sulfate, which is dissolved in the remaining amount (8/11) of acetone. This gives a 50% weak cationic modified acetonic NCO prepolymer solution with an NCO content of 1.20% and a viscosity ^ t ~ ^"f = 179 cP.

A continuous mixing, as is possible, for example, by the shear forces of a rapidly moving laboratory stirrer, of this prepolymer solution with equal parts of water, in which 85 % of theory, based on the NCO content, corresponding to 3.6 %, based on the total solids , 1,2-propylenediamine are dissolved, provides a sedimenting suspension. Man de-

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the aqueous acetone is canted off and the obtained is dried

Powder.

Melting range: 104-108 ⁰ C.

Melt index according to ASTM 1238-62 T condition B: 5.4 Melt index according to ASTM 1238-62 T condition C: 34.7 Melt index according to ASTM 1238-62 T, condition E: 197.3

example 1

The polyurethane powder A produced in solution according to process a) is fractionated by sieving. That in the sieve limits 0.2 - 0.3 mm insulated powder is placed on an un-

2 dyed cotton twill fabric with an m weight of 200 g sprinkled evenly through a sieve, the amount being 25 g / m 2. Then 20 seconds under one

Infrared heater with 1500 watts and a surface of

300 cm irradiated at a distance of 20 cm. The powder softens, sticks to the tissue and is firmly bonded to it after cooling. A cotton liner is placed on the prepared powder surface under a 170 ⁰ C hot ironing press (manufactured by Fa. Dückerstieg) at a pressure

of 400 p / cm pressed in 10 seconds. The laminate obtained shows the following separation strengths after cooling and air conditioning

Without treatment 0.7 - 1.0 kp / 2.5 cm after machine wash 0.6 - 0.8 kg / 2.5 cm (6O)

after dry cleaning 0.5 - 0.7 kp / 2.5 cm (in perchlorethylene)

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Example 2

The polyurethane A obtained from the melt according to process b) is ground and sieved. The grain fraction from 0.08 - 0.2 mm is isolated and applied on a powder point machine (Saladin, Sirnach / Switzerland) with an 11 mesh applicator roller

2
Inlay fabric with an m weight of 180 g is applied. After passing through a cooling zone, it is rolled up. Then according to climatic

Sieren of a circulation of 20 g / m punctiform coated fabric with a second fabric (wool top fabric) as described in Example 1 with an ironing press, pressed at 170 ⁰ C and a pressure of 400 p / m over 15 seconds. The composite material obtained shows the following separation strengths after cooling and air conditioning:

Without treatment 0.8-1.1 kg / 2.5 cm

after machine washing (60 ⁰ C) 0.7 - 0.9 kp / 2.5 cm after dry cleaning 0.6 - 0.8 kp / 2.5 cm (in perchlorethylene)

Comparative example 3

The above-described polyurethane-urea B (powder I) and a according to DOS 1 930 340 (US Pat. No. 3,684,639), Example 1, Polyurethane shown (powder II) are in paste form with a grain size of less than 0.08 mm on each one cotton fabric

2
with a m weight of 80 g applied evenly in dot form using a screen printing stencil and dried. The paste contains the following ingredients:

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500 g polyurethane powder 750 g water

40 g of glycerin

65 g emulsifier ' 2 g silicone defoamer

After air conditioning, the cotton fabrics pretreated in this way are placed on a laboratory press (from Kannegießer) under the in the Conditions given in table ironed with cotton tricot. The temperature acting on the polyurethane in the gap was measured with the help of a thermocouple. For those skilled in the art it can be seen from the table that the powder I) is already at Gap temperatures from 125 ° C, 10 seconds sealing time and

300 p / cm has clear sealing properties and at

400 p / cm already in 5 seconds with a sufficient level of adhesion is sealable. If longer sealing times are used at a pressure of 400 p / cm, over-fixing occurs. Powder II), on the other hand, hardly gives adequate fixation values under the specified conditions. For perfect ironing are higher pressure, higher temperature and longer fixing times necessary, as can also be seen from Example 1 of DOS 1 930 340.

¹ reaction product of polyethylene oxide and stearyl isocyanate

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(D

VJI

Tabel

Adhesion values of the laminates in Kp / 2.5 cm

VO σ »

Roller temperature

Roller temperature

Press Tsp. Powder I) 180 ⁰ C Tsp. Powder I) 17O ⁰ C Press duration ⁰ C Powder II) ⁰ C Powder II) pressure lake p / cm 5 120 0.25-0.35 105 0.1 200 10 130 0.3-0.5 0.2-0.35 120 0.15-0.25 0 15th 143 0.35-0.7 0.3-0.5 130 0.25-0.4 0.05-0.15 5 125 0.25-0.35 0.2-0.35 110 0.2-0.3 0.25-0.4 300 10 135 0.4-0.6 0.2-0.35 125 0.4-0.6 0.05-0.1 15th 143 0.6-0.9 0.2-0.35 115 0.55-0.75 0.25-0.4 5 125 0.6-0.9 0.3-0.45 115 0.55-0.75 0.2-0.3 400 10 135 0.55-0.75 0.3-0.45 130 0.5-0.8 0.2-0.3 15th 143 0.4-0.6 0.4-0.6 142 0.75-1.0 0.15-0.3 0.5-0.7 0.3-0.55

Ca) K)

(Continuation)

to

Tabel

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Rolling temperature 160 ⁰ C

Press pressure Pressing time Tsp. Powder I) Powder II) ρ
p / cm sec ⁰ C 200 5 100 0.05 0 10 115 0.15 0.1 15th 120 0.15-0.2 0.15 300 5 100 0.05-0.15 0 10 120 0.4-0.65 0.2-0.4 15th 125 0.4-0.7 0.2-0.4 400 5 110 0.5-0.7 0.05-0.1 10 125 0.7-1.0 0.25-0.4 15th 135 0.8-1.1 0.25-0.45

Tsp .: temperature in the gap (measured on the fabric)

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Claims (2)

Patent claims : ) Use of polyurethanes and polyurethane ureas, from a) 55-95% by weight, based on the total polyurethane mass, of compounds with at least 2 aliphatic hydroxyl groups, a molecular weight between 1000 and 2500 and a melting point between 25 and 130 ^° C., b) polyisocyanates and c) 0 to 15 wt .- ^, based on the total polyurethane mass, on aliphatic polyols and / or polyamines at an equivalent ratio of 0.9 to 1.05 for the short-term fixing of textlien Flat structures. 2) Use of polyurethanes and polyurethane ureas made from a) 55 - 95% by weight, based on the total polyurethane mass, of compounds with at least 2 aliphatic hydroxyl groups, a molecular weight between 1000 and 2500 and a melting point between 25 and 130 ° C, b) polyisocyanates and c) 0 to 15% by weight , based on the total polyurethane composition, of aliphatic polyols and / or polyamines at an equivalent ratio - ^ were prepared from 0.9 to 1.05, a melting range of 100 - 120 have ⁰ C and a melt index according to ASTM 1238-62 condition B T of 10 i 5, condition C 30-10 and condition E from 150 - 50, for short-term fixation of textile fabrics. Le A 15 196 - 20 - 509817/1 102