CS240960B2 - Powder from lowpressure polyethylene to coat flat formations - Google Patents

Abstract

Coating, esp. by printing with a powder or paste, is carried out with polyethylene powder (I) having a different polymer (II) adhering to the surface of the particles. Pref. (I) is LDPE powder. (II) is a polyamide, polyurethane, polyester, polyacrylate, polyvinyl halide, polyvinyl acetate, polyether and/or polyalcohol. A plasticiser (bisphenol A) may be added. The amt. of (II) is 0.5-25 (1-10) wt.% w.r.t. (I). (II) is applied as a soln. or dispersion and dried. A double dot coating may be used, the coated (I) providing a barrier layer preventing the top layer flowing into the interfacing. This barrier layer consists of (I) contg. 0.5-10% (II), whilst the top coat consists of a hot melt adhesive powder of copolyamide (m.pt. 80-130 deg.C) or copolyester (m.pt. 115-140 deg.C). (I) has a particle size distribution of 0-200 (9-80) microns. The breaking load of the (II)-coated (I) at room temp. is (min. 25, pref. min. 50%) lower than that of uncoated (I). The technique is esp. useful for coating woven, knitted and nonwoven textile, real and artificial leather and foams. The surface properties of (II)-coated (I) are about the same as those of (II) powder, allowing (I) to be applied in the same way as other more costly hot melt adhesive powders, e.g. (co)polyamides and (co)polyesters.

Description

The present invention relates to the use of a polyethylene powder for the surface coating of flat materials. departments. . · And in particular inserts the top thereof, wherein deposition is. · Performs printing powders or pastes, and polyethylene powder particles of foreign polymer ·, sheet may consist ^of hair ^tissues or ^p Leten ^s fabric, fleece, ^CMD Kindred ^s and 'm ^ ^é lé'usně.neRppěnov mass. . . ,.

Polyethylene is used, inter alia, for the coating of fabrics with hot melt-forming powder adhesives because it is cost-effective and the coating has the desired wash and cleaning stability. Main. the use of polyethylene has hitherto consisted in the application of powder to liner shirts.

Application of polyethylene powder * of the insert exchange process in which finely divided polyethylene-primary ...... and then engraving the depressions fabric roll takes place mostly in powder bodo- ^of TS ⁱ n ^<dS milled for grain ^gl omerovanýc ^h of low-pressure polymerization · Ethylene - imprinted into transmits on textile belt.

In addition to this use, coating with a paste prepared from low-pressure polyethylene powder is also of some importance. However, in the field of linen fabrics for outerwear, polyethylene has not established itself, since the ironing of the fabrics has harsh conditions which could cause damage to the fabrics.

Polyethylene can only be used for the outer garment section if it is applied as a base layer in the raster coating on which the top layer, for example of copolyamide or polyester, can be easily fixed. This method is described as a method of two-layer spot coating of powders in German Patent No. 2,536,911.

Due to the favorable production price of low-pressure polyethylene powder. the cost of the overall coating is reduced to about two-thirds without the need for sharp ironing conditions. In addition, particular advantages of simultaneous spot coating of the two-layer powder can be expected, since commercial low-pressure polyethylene powder for both the melt viscosity and melting point is suitable for the desired range of conventional simultaneous spot coating of the two layers.

However, when the use of polyethylene is tested in the manner described in the above-mentioned patent specification, there is a problem at the temperature used in the sense that there is no net point transfer, or at elevated temperature, surface damage occurs.

It appears that commercially available powder copolyamide and low-pressure polyethylene differ too much in sintering in the engravings. Until now, it has not been possible in practice to achieve a satisfactory simultaneous spot application of a two-layer powder, with a low-pressure polyethylene base layer.

SUMMARY OF THE INVENTION It is an object of the present invention to provide conditions which, when polyethylene is used, allow the coating of flat materials without different behavior in the engraved depressions.

The aim is achieved by using the polyethylene powder as described above, wherein the grains of the polyethylene powder are at least partially covered with a layer containing the foreign polymer. Accordingly, the present invention provides a polyethylene powder for coating flat materials and, in particular, for topcoat inserts for application in particular by powder or paste printing, for example by two-layer dot printing, characterized in that the low-pressure polyethylene powder has a diameter up to 200 µm. 0.5 to 25% of the grains are at least partially covered with a foreign polymer with polar groups.

In the process according to the invention, the polyethylene is preferably a powder derived from the synthesis of low pressure polyethylene. The low-pressure polyethylenes preferably used according to the invention have a melt flow index determined according to DIN 53 735 at a temperature of 190 ° C and a load of 21.6 Ν, 2 to 35 ^g / 10 min. The melting point of such polyethylenes is 122-137 ° C and the specific gravity is 0.95-0.965 g / cm 2.

The foreign polymer deposited on the surface of the polyethylene powder may be of natural or preferably synthetic origin. The coating layers may be pure foreign polymers or polymer blends with plasticizers.

Polymers and / or plasticizers containing preferably polar groups such as acid amide, urethane, carboxylic acid, carboxylic acid ester, ether, nitrile, halogen, sulfonamide groups.

Thus, for example, the following polar group polymers may be advantageously used: natural or synthetic acid amide resins, polyurethanes, natural or synthetic polyalcohols, poly (acrylic acids), polyvinyl acetate, polyether, polyacrylonitrile, and polyvinyl chloride.

The polymers may also be in the form of a copolymer with other polymers. Depending on the purpose of use, mixtures of the abovementioned polymers may also be used to modify the grain surface of the powdered polyethylene. As the plasticizer with polar groups, for example, cyclohexyl phthalate, toluenesulfonic acid amide and bis-phenol A are mentioned.

The proportion of foreign polymer may vary within wide limits, and in general the proportion of foreign polymer may be 0.5 to 25% by weight based on the weight of the polyethylene. In the most common embodiment of the invention, however, a proportion of the foreign polymer of about 1 to 10% by weight, based on the weight of the polyethylene, is sufficient.

The foreign polymer can be applied to the surface of the polyethylene powder grains in different ways. For example, it is possible and customary for the foreign polymer to be applied in the form of a solution or dispersion to powdered polyethylene and then to dry.

The mixing can be carried out in a relatively simple manner, taking care to ensure a good, uniform mixing. For example, high-speed dough kneaders are suitable for mixing. In order to ensure uniform mixing, a trace of a water-dispersible pigment can be added.

When the blend no longer contains different color spots, it is perfectly homogeneous. Generally, the polyethylene grains are introduced into a mixing vessel, the other ingredients are added and then mixed. ^Width measurement processes are ^running and ^{a P} ro ^P říUa ^{d at} 100 DEG C. ^d liquors until the ^stern of N ^{and D} and the ^LSI vDikost evaporates. On conventional bars, for example, drying is completed in about one to two hours. The mixing time for high-speed dough kneaders is, for example, about 5 to 10 minutes.

Grains of powdered polyethylene with a surface partially or completely covered with a foreign polymer can be applied in a variety of ways to coat the sheet and especially the liners of the topsheet. Preferred methods of application include powder coating, optionally pasted.

The modified polyethylene powder grains used according to the invention with a foreign polymer fraction on the surface can be used as such or in combination with other polymers by so-called dot-matrix printing with two-layer particles. Thus, polyethylene at least partially coated with a foreign resin can be applied.

In this case, it is preferred that the polyethylene powder forms a sealing or backing layer which prevents the topsheet from flowing into the liner. In this case, the bottom layer applied directly to the liner preferably comprises grains of powdered polyethylene having a foreign resin content of 0.5 to 25% by weight, based on the weight of the polyethylene from the bottom layer or formed by them.

In other words, modified grains of powdered polyethylene are formed directly on a sheet-like structure, for example a ria liner lying underneath the grid, to which a second grid layer, which is composed of another polymer, can then be accurately applied.

However, the invention also relates to an embodiment in which the bottom layer of the two-layer spot coating comprises only a proportion of the modified grains of the polyethylene powder according to the invention to which polymers conventionally used for this purpose can additionally be admixed.

When using the modified powdered polyethylene grains of the present invention as the backsheet of the two-layer spot coating, the topsheet is particularly preferably a copolyamide or copolyester.

Commercially available copolyamides having a melting point of 80 to 130 ° C and a melt flow index of 5 to 75 g / 10 min, determined according to DIN 53 735 at 160 ° C and a load of 21.6 N, are suitable. If copolyester is used instead of polyamide or copolyamide especially preferred are copolyesters having a melting point of 115-140 ° C and a melt flow index of 10-25 g / min, determined according to DIN 53 735.

Preferably, according to the invention, a two-layer coating is carried out, the bottom layer of which is modified grains of powdered polyethylene having a proportion of 0.5 to 10% by weight of foreign polymer and whose top layer consists of powdered copolyamide in melting with a melting point of 80 to 130 ° C; from a melt adhesive copolyester powder at a melting point of 115-140 ° C. However, the invention also relates to the use of modified grains of powdered polyethylene for single coating, to which the second raster layer is no longer applied.

The correct choice of polymer or combinations thereof with a plasticizer can be determined by trial coating, which does not cause a problem for the person skilled in the art. However, it is also possible to take into account the measured sintering behavior data of the processed powder.

For the quantitative determination of the sintering behavior, a measuring device comprising two circular half-shells, for example iron, which together form a hollow cylinder 5 cm in height with a base area of 10 cm is suitable.

For a sufficiently accurate measurement, a powder is poured into this hollow cylinder, which is then mixed with a stabbed needle and loaded with a 0.5 kg metal cylinder with a base area 2 of 10 cm as well.

Additionally a 4.5 kg load is added. At each selected temperature to which the powder was pre-heated with the apparatus, a load of 5 minutes is performed. After removing all the load weights, the trays are opened.

The ultimate strength of the resulting pressure cylinder is determined by means of a loaded template (weight 14 g, base area also 10 cm). A commercially available powder copolyamide having a grain size of up to 160 µm and a commercially available low pressure polyethylene powder having a grain size of up to 200 µm and up to 80 µm can provide the values shown in the following table under the above measurement conditions at 25-50 ° C.

In the case of the measured values at a temperature of 50 ° C which deviates from the room temperature by 25 ° C, it is to be understood that the breaking load is also dependent on the preceding temperature course in the heating period.

In order to capture this dependence, the following table always shows two measured data. The higher measured value (а /) refers to a two-minute warm-up time and a five-minute compressed time.

The lower measured value (Ь /) refers to 50 ° C and a 5 minute compression time.

for 3 hours pre-tempering at temperature

Table

21 ° c / а / Deň: 32 ° C / ь / Copolyamide up to 160 µm 1.00 N 9,00 N 4.00 Low pressure up to 200 µm 3,00 N 7/20 N 4.70 polyethylene up to 80 µm 5,00 N 8.60 N 5.70

N

N

N

As shown in the table, it probably depends on how to change the surface of the low-pressure polyethylene through a foreign container so that the breaking load at 25 ° C drops to the copolyamide / copolyester / and also increases strongly with increasing temperature, as with copolyamide / copolyester /.

The low-pressure polyethylene treated according to the invention, however, only partially observes this idea, as is evident from the following examples. The measured data are all recorded on tempered and completely dried test specimens (Ь).

He did

000 parts by weight of low-pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm) and 150 parts by weight of polyamide sol in water were mixed intensively and then dried on bars at 100 ° C.

Ultimate load: 25 ° C 1.32 N, ° C 1.10 N.

Example 2

000 parts by weight of low-pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm), 20 parts by weight of a 30% aqueous solution of polyacrylamide in water (Texapret AM, BASF) and 60 parts by weight of water are mixed intensively and then dried temperature 100 ° C.

Ultimate load: 25 ° C 2.45 N ° c 1.32 N.

Example 3

000 parts by weight of low pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm), 25 parts by weight of a 30% dispersion of polymethacrylic acid in water (Latecoll D, BASF) 2.5 parts by weight of bisphenol A, ground and parts by weight of water mix vigorously and then dry on the skins at 100 ° C.

Ultimate load: 25 ° C 1.13 N ° C 1.84 N.

Example 4 and d 4

000 parts by weight of low-pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm) and parts by weight of 5% starch ether (Monagumm N-solution, Henkel) were vigorously mixed and then dried on slats at 100 ° C.

Ultimate load: 25 ° C 2.43 N, ° C 1.35 N.

Example 5

000 parts by weight of low-pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm), parts by weight of 40% dispersion of PVC in water (Lutofan 300 D, BASF) and parts by weight of water are mixed intensively and then dried on slats at 100 ° C.

Ultimate load: 25 ° C 3.84 N, ° C 4.53 N.

Example 6

000 parts by weight of low pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm), parts by weight of 40% dispersion of PVC in water (Lutofan 300 D, BASF), parts by weight of 30% dispersion of polymethacrylic acid in water (Latecoll D, BASF) and parts by weight of water are mixed intensively and then dried on slats at 100 ° C.

Ultimate load: 25 ° C 2.70 N, ° C 2.65 N.

Example 7

000 parts by weight of low pressure polyethylene (Abifor 1330 (6, Billeter, up to 80 µm)), parts by weight of a 50% dispersion of polyacrylate in water (Pléxtol DV 580, Rohm GmbH), parts by weight of water and parts by weight of dicyclohexylphthalate dried on strips at 100 ° C.

Ultimate load: 25 ° C 2.74 N, ° C 1.65 N.

000 parts by weight of low-pressure polyethylene / Abifor 1300/6, 80 parts by weight of a 5% gelatin solution in water are mixed intensively and then dried on slats at 100 ° C.

Billeter, up to 80 a

Strength load:

1,84 N,

1,24 N.

Example 9

000 parts by weight of low pressure polyethylene (Abifor 1300/6, Billeter, up to 80 µm) and 150 parts by weight of a 10% polyamide sol in water and parts by weight of bisphenol A ground were intensively mixed and then dried on slats at 100 ° C.

Strength load:

Low: 14 ° C

1,70 N,

7,50 N.

Example 10

000 parts by weight of low pressure polyethylene (Abifor 1300/6, Billeter, up to 80 pm), parts by weight of 30% polymethacrylic acid dispersion in water (Latecoll D, BASF), parts by weight of bisphenol A, ground, parts by weight of toluenesulfonic acid amide and parts by weight of water is vigorously mixed and then dried on skins at 100 ° C.

Ultimate load: 25 ° C 2.50 N, ° C 7.50 N.

Example 11

000 parts by weight of Abifor 1 300/6 (0 to 80 pm) / parts by weight of cellulose ether / МС 400 S Walsrode / parts by weight of Sorbit F / · 70% sorbitol solution from Merck /

400 parts by weight water parts by weight Primer VSC / ® 30% dispersion of methylated condensation product of fatty acid amide and ethylenimine with ethylene urea groups from Farbwerke Hoechst / is vigorously stirred, dried on molds at 100 ° C and then mixed with 0.05% finely dispersed magnesium stearate.

Ultimate load: 25 ° C ° C

3,60 N,

3.20 N.

Example 12

000 parts by weight of Abifori ® 1300/6 / 0 to 80 pm / parts by weight of Collacral VL / with a 30% solution of vinylpyrrolidine copolymer from BASF / parts by weight of Sorbitol F parts by weight of water by parts by weight Primenit VSC are mixed invensively and then dried at 100 ° C and converted to a fine powder.

Ultimate load: 25 ° C 2.00 N, ° C 3.10 N.

Example 13

000 parts by weight of Abifor 1 300/6 / 0 to 80 pm / parts by weight of Vinarol FV / «Hoechst polyvinyl alcohol / parts by weight of Sorbit F parts by weight of Primenit VSC

200 parts by weight of water are mixed intensively, then dried on skins at 100 ° C and converted to a fine powder.

Ultimate load: 25 ° C 3.50 N ° C 2.50 N

Example 14 and 000 parts 20 parts weight of Abifor 1 300/6 / 0 to 80 дт / weight of cellulose acetate / А 400-25 from Eastman)

parts by weight of benzyl butyl phthalate

100 parts by weight of acetone are stirred vigorously and air dried, then converted to a fine powder.

Ultimate load: 25 ° C ° C

0.85 N

1.10 N

Example

000

100 parts by weight parts by weight by weight by weight

300/6 (0 to 80 µm)

Abiforu 1

Griltex 4 P / EMoly-Chemistry copolyamide / methanol methylene chloride water is vigorously stirred and air dried

0.03% of the finest dispersed magnesium stearate is still mixed into the dry powder

Ultimate load: 25

5,00 N

7.30 N

Example 16

000 parts by weight of Abifor 1 300/6 (0 to 80 µm) / parts by weight of Grilltex 8 P / Ems-Chemie copolyester / 200 parts by weight of methylene chloride are vigorously stirred and air-dried.

Ultimate load: 25 ° C 4.90 N ° C 8.50 N

Example 17

000 parts by weight of Abifor 1300/6 / 0 to 80 µm / parts by weight of Vinnapas EP 17 / about 50% dispersion of ethylene vinyl acetate copolymer, from Wacker-Chemie / parts by weight of water

10 parts by weight of Primenit VSC are vigorously stirred, dried at 100 ° C and converted to a fine powder. 0.05% of the finest dispersed magnesium stearate is mixed into the dry powder.

Ultimate load: 25 ° C 5.00 N ° C 5.00 N

Example 18

000 parts by weight of Abifor 1 300/6 / 0 to 80 µm / parts by weight of Acronal 295 D / about 50% dispersion of BASF mixed acrylic ester polymer / parts by weight of water by parts by weight Primenit VSC is vigorously stirred, dried at 100 ° C and converted to a fine powder.

Ultimate load: 25 ° C 7.00 N ° C 13.00 N

Příla

000

300 Parts Parts Parts Parts Parts

Abiforu 1 300/6 / 0 to 80 / µm /

Natrosol HR 250 (hydroxyethylcellulose from Hercules)

Sorbitol F water by weight weight weight weight weight Primenitu VSC is intensively ^F ine ^{Cha Si} su te ^{when p} lot ^of 100 ° C and ^BC eve ^d e on fine ^p r ^as E ^. To Suc ^hé him powder were mixed 0.03% of finely dispersing magnesium stearate.

ZAT ^Iz en ^I on ^p evnosti between 25 ° C ° C

7 ^. 50 N

5 ^. 50 N

Example

000 parts parts parts with intensive ^{and in some} weight by weight by weight of the BASF / pbw ^stirred, dried

Load

Example

000

300/6 / 0 to 80 (im)

Abiforu 1 water

Collacral PU 85 / »28% polyurethane ether solution from the company

Primenitu VSC

^EXAMPLE te ^pl OTE between evnosti ^p .: 25 ° C C parts parts parts parts parts by weight Abiforu 1 wt. Texapretu BASF / water weight by weight by weight of sorbitol f Primenitu VSC int.enzivn the MIC ^{of H} and ^{are, with} the d ^at te ^p lot ^{of 100} ° ^C and converted to ^{a straight} fine race ^{to p.}

2.45 N

1,80 N

300/6 / 0 to 80 µm /

AM / 30% solution of polyacrylic acid amide in water

100 ° C and ^BC eve ^d e to ^p Rašek fine ,.

Ultimate ^load : 25 ° C ° C

2 ^. 15 N

1.16 N

Only examples 9 and 10, wherein bisphenol A is included as a plasticizer, have roughly a load ha between the strengths of the copolyamide. For all other Examples 1-8 decreased ^from en ^also on driven onto the ^p evnost ^and SBRO to ^h tillering ^t u ^k o ^p o ^ly am ^id for ^at te ^p lot ^of 25 ° ^C and ^with A ^to strong between 'strength the rise in temperature has disappeared.

While approaching s zatívzr ZAT ^{growth and} most of the examples were actually shows a decrease in the breaking load. In spite of this powder according to the invention, these examples are satisfactory for two-layer spot coating

In deviation powder.

however, a powder treatment similar to that of A as a plasticizer is preferred. Experimental testing shows

In practice with bisphenol, it can be coated at a particularly high speed.

in Examples 9 and 10, such coating compositions for coating fastnesses

Powder density polyethylene of Example 10 may be used in principle example bilayer point coating powders of high and without any failure in the process of coating in conjunction with a commercial copolyamide zrnění.až on Jun 80, o te ^p ture T ^and the 110-120 ° C. this index ^to melt at about 14 g / 10 min.

^p determined by ^{y l} e norm DIN 73 ⁵ 3 1 ^{5 at 60} ° C and under ^{these same} en 1 ^{s 2, 6,} N ^{at. pl} te of ^you present on the gravure ^s c ^h <1

roller temperature 45 ° C _f hot roller temperature 250 ° C, arrangement of raster with sieve aperture 1,530 to

741 pm and a total applied weight of both polyamide and polyester layers of 10 to 20 g / m. The speed of the coating depends on the dimensions of the hot and gravure cylinder and the type of machine used.

By coating with a polymer-containing foreign layer, the low-pressure polyethylene powder obtains surface properties similar to that of copolyamide, especially when it contains certain plasticizers, such as bisphenol A.

As a result, they can be used in single coatings as well as in two-layer spot coatings at the same temperature of the gravure and hot rollers as. in the usual polyamide coating, but also in the polyester coating. .

In particular, it is possible to take advantage of the cost advantages of low-pressure polyethylene over other melt adhesive powders used. Because powdered polyester is about that. expensive as powder polyamide, it can also be chosen for a favorable price.

Based on the above tests and examples, it is apparent that, according to the invention, the foreign polymer is applied to the polyethylene grains surface in such an amount as to reduce the ultimate stress of the polyethylene powder cylinder at room temperature relative to the starting material. value without addition of foreign polymer.

Particularly favorable results are obtained when the ultimate strength of the polyethylene powder cylinder, which can be measured, for example, from above. The method described, based on the starting value without addition of the foreign polymer at room temperature, is. reduced by at least 25%, but preferably by at least 50 '^; %.

In the context of the invention, an advantageous value is obtained when the breaking load, determined at room temperature each time, is controlled by the addition of foreign resin so that it lies approximately in the region of the powdered copolyamide or copolyester usually used in a double layer spot coating of inserts. \

As such, the hot melt adhesive copolyamide powder may be mentioned. . such a powder,. having te ^p lot t <80 in ^I and ^from 130 ° C and co olyes ^{p t p} Er r ^and that ^the adhesive in the melt temperature .. counting and ^{I 115 1 4} 0 ° C. · .. ····. .

Although the invention is not based on certain theories, it is shown accordingly. The present knowledge is optimal when the breaking load of the polyester powder with said foreign resin is controlled such that at room temperature it corresponds to about the value of the commonly used powder copolyamide or copolyesether and increases strongly with increasing temperature as with said powder copolyamide or copolyester.

With the method according to the invention, the properties which are exhibited by the breaking load of the polyester powder applied can be surprisingly avoided in the coating process. at a high production rate.

At the same time, it is possible to treat such modified polyethylene powder under gentle conditions. For example, a modified powdered polyethylene utilized in the process such that either alone or together with powder copolyamide having a melting point of 80 to 130%, preferably 110 to 120 ° ≤ ^P s te ^pl OTE ^g ravurovac ^I C ^h rollers 35-60 C and ^{T H T} E EPLO ° rkých the LCU ^plated between 200 and ²⁷⁰ ° C nan ^about themselves ^Zn my way with ^those of ^h memory ^to a method for pr ^and SEC, as the coating forming the grid. In this case, the temperature of the engraving rollers can be particularly advantageously 40 to 40 ° C. High: 55 ° C.

Examples of polar groups of foreign polymers are given in the following table:

.Polar groups ^; : esterové Polymeric products cellulose acetate, mixed polymer of acrylic acid ester, ethylene vinyl acetate copolymer, copolyester · »Ether ... starch ether, cellulose ether, hydroxyethyl cellulose, polyurethane ether Hydrox hydroxyl polyvinyl alcohol, starch ether (partially etherified), cellulose ether (partially etherified), hydroxyethyl cellulose of an acid amide copolyamide, polyamide, acrylic amide, gelatin carboxylic acids. urethane. . pyrrolidone halogen atoms.  poly (meth) acrylic acid polyurethane ether vinylpyrrolidone copolymer , a polyvinyl chloride copolymer

SUBJECT OF THE INVENTION

Claims (6)

SUBJECT OF THE INVENTION - v ' A powder of low-pressure polyethylene for the coating of sheets and in particular for liners of coatings for application in particular by powder or paste printing, for example by two-layer dot printing, characterized in that it has a grain diameter / up to 200 µm and a surface weight of 0.5 to 25 % of the grains is at least partially covered with a foreign polymer with polar groups. • 2. The low-pressure polyethylene powder according to. The composition of claim 1, wherein the foreign polar group polymer is selected from the group consisting of polyamide, polyurethane, polyester, polyacrylate, polycrylamide, polyvinyl halide, polyvinyl acetate, polyether, polyalcohol, and mixtures thereof. ' 3. Powder from low pressure valve. , of polyethylene according to point 1, characterized in that it comprises a softener 4. Powder of low pressure hujepolar group. of polyethylene according to point 1, characterized in that the emollient comprises 5. The low-pressure polyethylene polymer powder is 1 to 10% by weight, based on the point 1, indicated by weight of polyethylene. that foreign share 6. The low-pressure polyethylene powder of claim 1, wherein the polar group is an ester group, an ether group, a hydroxyl group, an acid amide group, a carboxylic acid residue, urettonic acid. , ³ RRO ^{py l} idonic SKU i.na ^{p, t} and h ^ om gene or n ^ ⁱ and troskupii.