LT3055B - Pressure sensitive contact and manually-tearable contact adhesive tape, its application - Google Patents

Abstract

Pressure-sensitive contact adhesive which is characterised in that it contains a mixture of A) from 0 to 90% by weight of acrylate-vinyl acetate-acrylic acid copolymer having 2 to 8 carbon atoms in the alcohol component of the acrylate and, based on the copolymer, from 10 to 60% by weight of vinyl acetate and from 1 to 10% by weight of acrylic acid (Fikentscher K value in the range from 50 to 110, measured in accordance with DIN 51562 in tetrahydrofuran), B) from 10 to 80% by weight of acrylate-acrylic acid-N-methylolmethacrylamide copolymer having 4 to 8 carbon atoms in the alcohol component of the acrylate and, based on the copolymer, from 1 to 10% by weight of acrylic acid and from 1 to 10% by weight of self-crosslinking N-methylolmethacrylamide (Fikentscher K value in the range from 70 to 130, measured in accordance with DIN 51562 in tetrahydrofuran), C) from 0 to 90% by weight of acrylate-ethyl acrylate-N-methylolmethacrylamide-acrylic acid copolymer having 4 to 8 carbon atoms in the alcohol component of the acrylate and, based on the copolymer, from 1 to 10% by weight of acrylic acid and from 1 to 10% by weight of self-crosslinking N-methylolmethacrylamide and from 20 to 80% by weight of ethyl acrylate (Fikentscher K value in the range from 80 to 130, measured in accordance with DIN 51562 in tetrahydrofuran), D) from 0 to 25% by weight of phthalic esters (phthalates) having 2 to 12 carbon atoms in the alcohol component of the ester, where at least one of components A) and C) is present in addition to component B). It is suitable for the production of manually tearable contact adhesive tapes for the embroidery and textile industries.

Description

The invention relates to pressure-sensitive adhesives, materials and hand-release adhesive tapes; which may be. used in the embroidery and textile industry for the purpose of capturing textiles embroidered on working machines. In the present invention · '7 /' .Λ ,; ' --7 / -: ^:: 'yj / -' · - 7 / 7-7: / - ':, -,: 7/7:' 7 · '''v,^:; / · -: ./// '* / · - ·'. ·· 7 '' 7 ·. · '' ·. '. ·. ·.'; · ', / -, - /: / - .-,. 7 // '7; /7.- '7 /-/.-: 7-, 7, / :: - ¹ term adhesive tape'. Means not only strips but also other flat products such as sheets or sheets.

Ornament stitches are embroidered on a textile material with the help of a computer that controls the embroidery machines. The machines are equipped with a certain number of embroidery heads, which can be of types and types. Each has separate needles for different colored threads for different head embroidery. The textile material to be embroidered is fixed on wool paper or other hand-tearing material.

The locking device is embedded in a bounding frame that moves in accordance with a computer program, so that the needle embroideres the desired pattern at a rate of 700 stitches per minute. °

Suitable flat materials are wool fiber, especially wool paper and long fiber special papers. Wool fiber is a textile fabric made of textile fibers the types of which are improved by the use of appropriate adhesive fibers; Wool fiber, which is produced by reinforcing the fiber yarn, is called yarn yarn.

In general, it is understood to be a woolen textile product in which the yarns are evenly distributed, whether or not they are oriented. Unlike woven textiles, these fibers are not processed into yarns and woven fabrics, but are assembled together by blending and dispersing. The joints of these fibers are made mechanically, chemically and / or physically.

Wool products can have very different structures, 'nd§> rigid to very loose. With the weakest fiber orientation, this material is easiest to cut, bearing in mind that cutting losses are very low. Decisive properties of wool fiber · depends on fiber type, fiber viscosity, fiber core. element length and density, as well as the use of bonding agents.

Wool fibers are cellulose - based fibers, animal wool fibers are based on protein, semisynthetic viscose and acetate cellulose fibers, the synthetic fibers are based on polyamides, polyacrylonitriles,. polyvinyl derivatives, polyesters and polyolefins. Wool paper is based on cellulose. It also disintegrates during the relevant period. Wool fiber is often regarded as a special class of material in the broader sense *

Y'- ·? · · <'.''K:'/.'-'.-..'/ y '/? J;.; yYy / 'y: / .y y': / '/. <· '''-' _: yy'y; Y '/ · - // ...; Υ ·' · <'' ·

Special papers or other flat materials are used as a precondition for the use of wool fibers as embroidery operations. Those materials are compact. and elastic so they lie well over the embroidered fabric and improve the plasticity of the embroidery. In addition, they must be easy to tear off the outer edge of the ornament after use, without any problem.

In the past, wool embroidery sites have been sprayed with a spray-on adhesive consisting of a polyvinyl ester copolymer, such as a polyacrylic acid copolymer, which is soluble in chlorofluorocarbon compounds. Aerosols based on chlorofluorocarbons are used as motors for such spray adhesives. materials. When spraying adhesives in gaseous form, * the environment is sprayed during the spraying and drying period. Also, the messy gas formation. The use of sprays and adhesives also causes damage. Greasy spots appear and adhesive residue sticks to the needle penis after a short time of embroidery and interferes. correctly direct the thread. Adhering to the embroidery

- The materials used to spray adhesive wool are often too weak. If the textile material moves during the embroidery process, the embroidery template, the adhesive varnishes lose their tackiness after a short time.

. · 777--7 / 7: 7/7 '7: -; y / 7 7 .////y.-7y '7' 77 · 7.'Ζ / 7 /: '7.7 ///' 77 / ·; 77 //:./. 7: 7-1 / 7- y ·. / ·? / 7- · Ί '/' 1 // ^; / 7 7 -77 '.' / 77 · 77'7 - / '7-'7 \ 77 :; 777 '7 / y /' 7 7- / 7'7 /// 77/7 7- ·· / - // z / 77 '<777' -7.,. / 7 / '/; - yy

Also the damage is due to the fact that. spray adhesive very stiff varnishes on traditional wool paper when it is impossible to accurately trace them

7: 7/777 ^ / 7 _; ';, 77; 7 ^ 7777'·;77; /: 77 ·· 7; · 7: /: /.: ^ 7 / 7.7 / 7: .7; .7 _ '; //. 7..i / : //7y/77.yVy7/'įy7/,7i; / ·; J / 7 _; 7y7? / 77 / 77-777-y: / i77y / '7y ^ -y / - // 7./y7/7:.p>^; 777yyy <//; / '; yy: 7'; 7yy-y: .- \ ./ yy'77y / y77yy7 · / in '.

material becomes very 'unstable when sprayed widely ..

Therefore, it is necessary to properly treat the woven and sewn products before embroidery, to cover the surface of the base material with a spray-on adhesive textile so that

-7 / ... / 677 /.7/-77 //: 7--1 ^: 7 // 7/7 777 // 7 7/7 - / - 77/7/7: / 7 // / ..1-7.7 / ^: - 7 /// - 7'-7 7 -. 77/7 / '' ////7/7/7··1../://.77:- · /-//1.7 ¹ 77 /: 7/7: 717 / · // '. · -yz- 7 / - / 7 7 // 7 // 7 / - 7 / -7 / <the product would be locked then ,. when it is embroidered. The term capture is understood to mean the stabilization of stitches or woven fabrics,

Spraying over wider areas and doing it manually results in an uneven coating and can therefore:

(a) the unlocking of the product being sewn,

(b) inaccurate dosing that may result; spots on thin materials (chiffon, silk, jersey and 1.1.).

In addition, if the spray is too strong, the surface is highly compressed. In this case, the product is embroidered and, as a result, has a deformed, non-uniform thread length, and the product has an unsightly «shape.

Also when spraying too hard, thread like needles .5. offers * channel. are exposed, which means that the loop formation is in an ugly shape., or thread stitches from the exposed needle result in loop formation from a double rotary machine. There is no synchronization of actions, which results in thread intertwining, stitching misses, and a loss of machine embroidery time.

The alternative would be. use thermal wool. Thermo wool is a wool yarn or wool thread that is covered with an adhesive that is heat-soluble.

Thermal wool is used to fix the fibers of the most stretchable knitwear, and this wool must also be able to be detached from certain parts of the textile after embroidery. The use of wool in knitwear is considered to be very difficult because;

(a) the colors of the embroidery materials fade at too high a temperature and, where appropriate, the wool can only be separated with great difficulty, if at all possible without deformation of the embroidered material (as indicated by residues (adhesive particles) on the embroidered product).

(b) proper use of thermal wool is only possible in the context of improvements. Its application options result in rapid wear of expensive machine mechanisms (locking press »cross-locking unit or metal parts).

, 7/5 ·; When metal parts are used, it is not possible to directly control surface heating and cooling. This results in uncontrolled release of the material as the embroidery process takes longer.

The use of thermal wool is the first step in expanding the product range. It can be used when a very smooth surface is required to remove from the captured material, but it is expensive.

The question now is whether the method of applying wool by itself is more suitable for this purpose than spray adhesive wool. Pressure-sensitive adhesive compositions or adhesives have been widely used everywhere in the form of adhesives in industry, in the arts, in the home.

There are many examples in the patent literature where organic products and aqueous dispersions are based on rubber products and polyacrylic acid ester adhesives. DE-OS 36 43 987, DE-OS 38 '43 421 and EP 0 141 504 substances consisting of copolymers of acrylic acid esters, acrylic acid and other m <© monomers.

DE-OS 30 18 131 describes adhesives consisting of polyacrylic acid esters and solvent based polyisocyanates. Emulsion adhesive polymeric material of n-butyl acrylate, 2-ethylhexyl acrylate, acrylic acid, acrylonitrile, vinyl acetate, methyl methacrylate and other monomers are disclosed in EP 0 130 080, EP 0 193 295, EP 31 25 00 75, DE 31 47 007, DE , DE 35 31 601, DE 38 29 077, DE 37.01 757 and DE 38 08 706.

When self-adhesive wool for textile embroidery, • all adhesive materials reviewed are based on a polyacrylic acid ester, showing defects that interfere or significantly reduce its use. A maintenance study has shown that adhesives very quickly block or get stuck in the needle cap or do not stick to the wool, so that when textiles are removed, they become confused about the latter. Other adhesives are well attached to the wool, but then remain on the textile. Most of the adhesive is partly deposited on wool and textiles. During sewing, washing · or cleaning, such sewn-in pieces of wool can damage textiles in the embroidered area because the low molecular weight adhesive components cause stains.

It is an object of the present invention to provide a pressure sensitive fabric for textile embroidery, the above damage and. can handle a variety of problems such as adhesive bonding of the product Only at high speeds does not cause the textile solution used.

the adhesive which is to be embroidered, the embroidery adhesive does not clog the needle ear for a relatively long time.

The object of the invention is achieved by providing a pressure-sensitive adhesive consisting of the following components and common additives:

A) up to 90% by weight, in particular 0 to 86% by weight, of acrylic acid ester-vinyl acetate-acrylic acid copolymer having from 2 to 8 carbon atoms in the alcohol components of the acrylic acid ester and from 10 to 60% by weight of the corresponding copolymer, especially 15% to 55% by weight of vinyl acetate and / or up to 10% by weight, especially 2 to 8% by weight, of acrylic acid.

Fikentscher range from 50 to 110 (measured according to DIN 51562 for tetrahydrofuran).

B) from 10 to 80% by weight, in particular from 10 to 75% by weight, preferably from 10 to 67% by weight, and in particular from 10 to 60% by weight, of an acrylic acid ester-acrylic acid rN-f methyl ol methacrylamide copolymer. containing from 4 to 8 carbon atoms in the alcohol components of the acrylic acid ester and the corresponding copolymer, from 1 to 10% by weight, in particular from 2 to 8% by weight, from 1 to 10% by weight of acrylic acid, particularly from 2 to 8% by weight % self-crosslinking N-methylol methacrylamide (K value according to Fikentscher in the range 70 to 130 (measured according to DIN 51562 for tetrahydrofuran)) C) 0 to 90% by weight, especially 0 to 85% by weight, acrylic acid -steroethyl acrylate-N-methylol methacrylamide-acrylic acid copolymer with 4-8 carbon atoms in the alcohol-acrylic acid ester components and the corresponding copolymer, from 1 to 10% by weight, in particular from 2 to 8% by weight, of acrylic acid, 1 to 10% by weight, particularly 2 to 8% by weight, acrylic acid, 1 to 10% by weight; up to 8% by weight, self-crosslinking N-methylol methacrylamide and 20 to '80% by weight, 'particularly 20 to 60% by weight, preferably 25 to 55% by weight, ethyl acrylate® (K by Fikentscher range) 80 to 130 (measured to DIN 51562 for tetrahydrofuran)).

D) from 0 to 25% by weight, in particular from 0 to 20% by weight, of the phthalic acid ester with 2 to 12 carbon atoms in the alcohol components of the ester.

The amount of components A) and / or C) which is added to component B) is:, preferably at least 0.1% by weight, more preferably at least '/ r

1.0% by weight and a particularly suitable amount of at least 5% by weight. When component A) is used, it is preferable to use it in amounts of from 5 to 86% by weight, more preferably from 13 to 86% by weight / and especially

suitable amount from 10 to 50 IU ·. %. When component C) is used, it is preferable to use from 5 to 90% by weight, more preferably from 10 to 90% by weight, and a particularly suitable amount from 2Q to 90% by weight. When Component D) is used, it is preferable to use it in amounts of from 5 to 20% by weight, more preferably from 10 to 20% by weight.

The adhesive components are prepared by conventional techniques known from the patent literature.

Preferably, component A has a size K of 60 to 100, component B has a size of K between 80 and 120, and component C has a size of K between 90 and 120.

^15th

Other small monomer sizes, such as, for example, methacrylic acid ester, methacrylic acid, methacrylonitrile and styrene, may be polymerized into a mixture of components A) and C). The monomers may comprise the following copolymer amounts: from 0.5 to 25% by weight, more preferably from 0.5 to 20% by weight and a particularly suitable amount from 1 to 15% by weight based on the weight of the copolymers. Preferred Acrylic Acid Ester • 7 '', '.. -77 --- / · /' /-.-// {(/ (7/7 -y / 7/7 / '/>.7 /./ 7 / 7 (<-, 7 / - / 7 //7(//7,.- / - / 7. (//: / 7 '// y / (' ·· '7' // '7/7 / - 7 / {· '· / - / (./, · / (/ ·' /, '· /) components in the copolymers are n-butyl acrylate and / or 225 ethylhexyl acrylate.

According to the present invention, the most suitable mixture is an aqueous dispersion having a pH range of 7 to 8, more preferably 7 to 7.5, with ammonia water.

The mixture is coated with a reinforcing agent in an amount of 5 to 50 g / m ² , a particularly suitable amount is in the range of 10 to 45 g / m ² , dried to self-adhesive film and coated with an anti-caking agent.

The aqueous dispersion of the copolymer consists of anionic emulsifiers known from the literature such as those described in Houben-Wey1, Methoden der.

Chemie, Macromolecular Stoffe, Georg-Thieme-Verlag, Stuttgart, vol. 14 / in, 1972, p. 192-208.

Additives such as thickeners, humectants, and foam inhibitors are added to the dispersion in the usual amounts (0.5 to 5.0% by weight, more preferably 0.1 to 5% by weight, for proper film coating and good film forming). 2.0 wt%).

The invention also relates to the use of a pressure sensitive adhesive according to the invention which can be used cold to coat support materials such as wool fibers, wool papers and specialty papers in the range of 15 to 100 g / m ² , more preferably from 20 to 40 g / m ² .

The area of thin and translucent insulating materials such as siliconized paper or siliconized film is coated with an aqueous dispersion. When drying the dispersion, the pressure-sensitive adhesive film on which the backing material is applied exerts a coating resistance of 5 to 50 g / m ² , more preferably 10 to 45 g / m ² . Wool fiber and cellulose-based wool papers are particularly suitable as ° support material.

By this method coated substrates which can be peeled off by hand are used as fixing tape in the textile embroidery industry.

Lightweight fabrics such as lightweight cotton, jersey and silk, and heavyweight textiles such as workwear, made from heavy cotton or wool, towels and denim, lightly pressed, adheres well to wool paper .

Textiles fixed with self-adhesive wool paper were embroidered at about 700 needle stitches per minute. After ten minutes of stitching, the needle eye and needle channel were not contaminated with sticky residue. During the quilting process, no slippage was observed. It was possible to gently tear the wool paper off the edge of the embroidered patterns and remove any sticky residue.

When embroidered textiles are sewn onto the top of a textile product, self-adhesive wool paper is usually not removed from the embroidered side of the textile, but sewn like a plastic liner. Funeral, washing and //.'ir//,/·'///;//'·?'t: ė't; · // · '/ · *' / 77 /: /, /// J // 7/7 / -7 ^7, /7//77;.7/:/;'7<// // 77 / //: /// 7 /// 7/777/7 - / -: 7 / -; 7 / '· 7 / Z · .'---. · //.'/</;.// t : '* 77 *' 7- ':''f·' // cleaning operations have shown that adhesive and wool 'paper does not degrade the quality of textiles.

Newly Created - Material is characterized as being suitable for textile and as a material which .'777.7 //; / Ή: ////////; /; // '-' //// to //: // - / '// 77 /? ///? 7 /; //; / 7: / 7/77 / - / 7-.77 // 77777 · /, /. 777 //// - 7,: - //; /; '- / // · / --- 7 // 77 // 7 // 7,7-7-77777 //// 7 ///// r // 7 // 77, // 7 // ^: .-- // easy to maintain. No. neither gas nor vapor impairs its utilization. In addition, it can be fixed on the surface of the embroidery by lightly pressing the contact (cold, lock). It goes well with knitted ,, quilted and woven fabrics .. Ever since. material made of and coated with. the surface of the base material, avoiding deformation. Use only for stitching at the edges or for individual stitches has the advantage that the embroidered material is short pressed but is considered as a coated film.

Since the adhesive according to the present invention neither shrinks nor softens, the entire mechanism and computer controlled embroidery machines, electronics, are spared. Molded contact film - can be adjusted so that neither the needle nor other parts are exposed to the adhesive. The capabilities of the machine are significantly intensified. In addition, less frequent maintenance is needed. The adhesive also does not cause contact between different yarn types. Using

I, Γ 3053 B adhesives in the embroidery industry, improved the attitude towards the embroidery industry itself.

A tape measuring 3.20 x 0.45 m is attached 5 to the embroidery frame using a mechanical clamp where the frame is restrictive. Silicone paper is. removable and secured to the embroidery by pressing at the point of contact. strip. Stabilization of the embroidered product affects its quality, as the stitches are not deformed. When . no thermal heating (burying) was used and the fiber was no longer heated or overheated during previous embroidery, it can be said that the embroidered material is conserved. Separate frames can also be used to perform this process, for example when used for completion.

The limiting or separate frame moves the auxiliary motor according to the prepared motion program. The needle stays in position and moves up and down during the quilting process. It is important that ^ΰ embroidery machine speed is set depending on the type of stitching, stitch length and stitching position. The material produced according to the present invention has the great advantage of, for example, strong bonding of surfaces.

the invention is further explained by the following examples.

· ' ₍

Examples 1 through 5.

In Table 1, the formulations of the materials are in the form of dispersions. The formulations are weighted to 100% solids, the data of the various aqueous adhesives of the invention being water, i.e. water.

proportions are not included

The variances were

¹² coated paper, formed on one side {67 after drying, forming adhesive film g / m ² adhesive. The adhesive coating was wool paper (about 30 g / m ² ) g / m ² ) _f so 'with about 10 coated on the table

123 4/5

Acrylic acid ester / vinyl acetate acrylic acid copolymer

N-Methylol methacrylamide copolymer of acrylic acid ester acrylic acid

Acrylic Acid Ester Ethyl Acrylate N-Methylol Methacrylamido Acrylic Acid Copolymer

Phthalic acid ester

The adhesive strength measurements were 10 standard 4001 (direct adhesive wool papers made from 1 to 5 adhesive formulations where wool paper is frequently torn and textiles are widely used).

The results of the measurements are shown in table 2 <7 ... /// below.f-f '' /. 13 '- 86 25

67 10 14 45

- 90-20

- 10 measurements taken according to 'AFERA')

LT 305

Table

1 / 7 -7 2 7 '7 3 7 7. 7-4 7; Adhesive strength of wool pope r with cotton N / ctfi ² 0.07 0.05 0.08 0.17 0.10 Nylon Lycra (Synthetics) N / cm ² 0.10 0.07 0.09 D., 21 0.12 Polyester wool N / cm? 0.45 0.41 0.43 0.39. 0.44 Chiffon Silk N / on ² 0.18 0.15 0.16 0.26 0.18 Flax N / cm ² 0.26 0.38 0.22 0.41 0.39 Mixed product of sin- Nectar and cotton N / cm ² 0; 18 0.24 0.14 0.37 0.27

A sample of wool paper with adhesive formulations from 1 to 5 was stored for 6 weeks at 70 ° C and the adhesive strength was measured for various textile types. No decrease in adhesive strength was observed.

DEFINITION OF INVENTION

Claims (8)

DEFINITION OF INVENTION A pressure sensitive adhesive consisting of acrylic acid ester compounds and excipients 5 me / Materials, characterized in that it consists of a mixture of:. a> 0-90% by weight, in particular 0-86% by weight, of an acrylic acid ester-vinyl acetate-acrylic acid copolymer having 210 8 carbon atoms in the alcohol components of the acrylic acid ester and in particular 10-60% by weight of the copolymer, in particular 15-55% by weight. % by weight of vinylacetate, and 1-10% by weight, especially 2-8% by weight, of acrylic acid (K value according to Fikentscherj, in the range 50-110 (measured according to DIN 15,51562 for tetrahydrofuran)); b) 10-80% by weight, in particular 10-75% by weight, preferably 10-67% by weight and particularly suitable 10-60% by weight, of an acrylic acid-N-methylol methacrylamide copolymer with 20 4-8 carbon atoms, an acrylic acid ester of the alcohol component and, accordingly copolymer 1-10 sv.%, And particularly 2-8 sv.% _F acceding itself to cross-linking of N-mėtilolmetakrilamido (K value according Fikentscherį interval 70-130 (measured according to DIN 25 51562 for tetrahydrofuran)) r c) 0-90% by weight, in particular 0-85% by weight, of an acrylic acid ester-ethyl acrylate-N-methylolmethacrylamide-acrylic acid copolymer with 4-8 carbon atoms of acrylic 30 acid ester in the alcohol components and the corresponding copolymer, 1-10% by weight, especially 2-8% by weight, - self-bonding N-methylol methacrylamide and 20-80% by weight, especially _H 20-60 '. •• R' ·. -v'R / '- R: ·' R .. R ['F:' - '/ -':. RRR ·. \ R% R • '• ..R' ··· '' R.RRRR ^: _; R ^; R RRRr'R'R '; R ^; '' RR ^? R; R ^: ''' ^: ' R. R · - R ', ^; -R '.R RR' · R; ·: '/'-'.RR'RR'R'-.R. ·% By weight, preferably 25-55% by weight of ethyl acrylic &lt; 35 Fikentscherj, in the range 80-130 (measured according to DIN 51562 for tetrahydrofuran)); d) 0-5% by weight, especially 0-20% by weight, of an ester with 2-12 carbon. atoms in the components .phthalic acid ester alcohol A pressure sensitive adhesive according to claim 1, characterized in that the acrylic acid ester components in the copolymers include n-butyl acrylate and / or 2-ethylhexyl acrylate. 3. The pressure-sensitive adhesive according to claim 1.2, wherein the manomers, preferably methacrylic acid ester, methacrylonitrile, methacrylic acid, acrylonitrile, hydroxyethyl acrylate and styrene are polymerized to 15 copolymers. 4. The pressure-sensitive adhesive according to one of claims 1 to 3, characterized in that the monomers listed are polymerized in copolymer in quantities. 2o 0.25-25% by weight. 5. The pressure-sensitive adhesive according to one of claims 1 to 4, wherein it is in the form of an aqueous dispersion. 6. The pressure-sensitive adhesive according to one of claims 1 to 5, characterized in that the aqueous dispersion with ammonia has a pH of 7-8. Use of a pressure-sensitive material according to one of claims 1 to 6 for producing a self-adhesive flat substrate coated on one or both sides. Use of pressure sensitive material according to Claim 35, characterized in that the flat base is wool fiber. 9. The pressure sensitive adhesive .medžiagos claims 6-7 for, characterized in that the flat bases is woolen paper or 'long fiber special pdpierius _r .Which weights are 15 to 100 g / jw o. A pressure-sensitive adhesive tape, characterized in that it contains at least one layer of material according to one of claims 1 to 6.