DE1594109A1 - Process for bonding absorbent materials made of textile fibers and / or plastics with dispersion adhesives - Google Patents

Description

SOLD- UWD SILVER-S.CHEIISAXST '

'' Frankfurt am Main, Weissfrauenstrasse 9

Method for gluing absorbent materials made of textile fibers and / or plastics with diapers Ionic adhesives

The invention relates to a new adhesive method, at -ecm sa Materials made of textile fibers and / or plastics r.it Using dispersion adhesives with good initial tack and good lukewarm strengths can be glued.

Absorbents are becoming increasingly common in many areas of technology Materials used which z. B. in the form of fleeces or felting of non-woven fibers with or without. binder ocier in the form of, in particular, open fabrics, sponges, foams or similar porous and absorbent structures will. -

To process such materials you need in many Cases a process which enables webs., Piece goods or other products made of such material, with themselves or with, for example, foils, leather parts, wood, stone, metal-.lischen To glue objects and the like.

For this type of bond you can use commercially available Solvent adhesives partly have satisfactory adhesive strengths, however, interfere with the processing in large series, the released solvent vapors so significantly that one in the Generally the use of dispersion adhesives is preferred.

Also prevents the use of solvent based adhesives the fire hazard, the odor nuisance, the higher price and the general physiological concern; also in terms of processing Solvent adhesives have disadvantages, as they are usually used on both ' Parts must be grounded and also always a best need immense flash-off time. In addition, the relatively expensive organic solvents evaporate considerably Losses. ; BATH 0 ^ 01 ^^ 0988 3 / -J 02 3

All of these drawbacks can be avoided by using dispersion adhesives used. So far this has been opposed by the fact that .. * "boim. Attempt to use absorbent materials with an open or porous structure, a. -3. those based on non-woven fibers, to be glued with dispersion adhesives - with each other or with other fabrics, such as foils, leather goods, products made from HoIs, stone, Xetall, plastics or the like. -, the dispersion adhesive as a result of the high. Absorbency of the materials mentioned is very high was quickly absorbed in this. The specialist.-.- awards "in front" quick agitation ". There is therefore not enough adhesive substance left on the surface of the material to create an adhesive bond when wet to obtain.

It has now been found that the bonding of absorbent materials made of textile fibers and / or plastics with the help of dispersion adhesives, even after a single one-sided coating, without surface drying, listed with high initial adhesion v / can be grounded if the absorbent material is provided with at least one electrolyte on the surface or continuously and it then or later by means of a dispersion adhesive with .einern. the same material or a different substance.

According to the invention, among the absorbent materials, cie textile fibers and / or plastics contain or consist of such substances and products, especially in web, sheet or Plattenf.form, understood that an open, porous, wide-meshed or have a similar structure and have good absorbency for water; this primarily includes textile structures and above all the so-called non-bonded structures, i.e. fleeces, felts, papers or the like, but also woven and knitted fabrics, in particular in a wide-meshed or open structure or with roughened surfaces, made of fibers of all kinds, including mixed fiber structures; when using synthetic fibers the effect is the measures according to the invention particularly striking and good because whose capillary action is relatively low compared to natural fibers. Such structures can also be used as absorbent materials. are set, which are previously prepared and or, or one-sided and / or partially coated or gummed 'are with binders

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of all kinds, in particular with plastics or plastic compounds, If the characteristic is the absorbency of the material at least • partially or unilaterally preserved.

_ ^ That absorbent material "can be in various ways." With- the Iilek- ' trolytes are equipped, preferably by wet means Impregnate with the solutions of the electrolytes with the following Remove the excess solution, for example by squeezing it off and / or suction and drying of the material; can the impregnation can be carried out through and through, so to speak, or only on the surface by spraying or by applicator. by means of mushrooms, splash rollers or anilox rollers with the solution. Man can for example 'but also the loading with the dry balances finely ground by blowing, dusting or Carry out a jet on the moistened absorbent material.

After or without intermediate storage, the electrolyte-containing materials are first provided for bonding with the dispersion adhesive, preferably by spraying on, nozzling on, brushing on, doctoring on or applying τΛχ applicator rollers or on similar V / eise; In general, a single one-sided order is sufficient, even if the two-time or multiple application is not to be ruled out according to the invention.

Electrolytes now cause the adhesive dispersion to coagulate or break, which surprisingly happens extremely quickly with a suitable selection, even with a low electrolyte concentration in the absorbent material; This means that the adhesive particles remain on the surface of the material and thus allow a smooth bond with good initial adhesion, which has hitherto been sought in vain 'by joining and ~ pressing-i-: the surfaces to be glued .;. ■ ...-.-. ■

The inventive electrolytes therefore need to be filled the kiecer.äer; Components of an Ivle.CctGiiai £ T), rsion cev; irker ».

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In this sense are v / in

serious, dissociating

good: proven suitable * · There are .aber'äuoh. die-SaI ^ e of / Ziihk ^ vNiokel ^

Cobalt and under / circumstances '-' Eiöän- and, Öhrom suitable ^^ As ^Vf Sätf # e: p # st £ S !!!

those "of the strong.inorganic · acids wiÖ'aer'ßöh ^ efBlW: *!

those "of the strong.inorganic · acids and hydrochloric acid 'are preferred, '', ^: .>■'■;.■;'· = .. /' - ':: ■ ^: v.;: ^; i ί' · ^:

Also ¹ . Salts ,. which are acidic or alkaline in the form of their solutions.! _yaw: jkommen considered ,, wherein: _the; P ^ value of the be «·. netzt ^ according to the invention equipped, absorbent material; - ^ ₁ between the values 3 - lO'liegon can. ^ ..i / _; ν. . '. / ·, ■ .- ^^%, IC

also possible ^ the formation of salt on the. ^:? absorbent _; Mat0rill; | iiiSl _w , ..-

For the:

Practice v / ird V the suitability of the?

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by crying, Reihe'von .Paktoren beeinfiußt.Öo forbid-f ^ Möhdie: - Anweridüng ^ on effective per se ": Verbindungeniunter: Ü & slähderi · durchtU ^ lffli her Bohädiiches Verhalten.-over '; subsequent to ^■: the ^ Baugfähige> |! ü = ||| il ||

eBohiohtungen, "in part ^{: due to} lack of j ^^^ ity or also 'by *' that .you. at ■ '■■■. (Y ¹ ^ i. CiM

Material to be applied BeBohiohtun ^ enι

physiological harmlessness

cause unwanted discolouration of the absorbent material.

Other active salts act as rubber poisons and bend - 4 According to this, the use of rubber or similar elastics * l * /, mers as binders in absorbent material or as subsequent / Coating, impregnation or finishing. . ·, ..; .

In addition, effective electrolytes are .gegebenenfalls less suitable because they are hygroscopic and thus give the ßaugfähigen ^j material to a height constant residual moisture. ".

Another limitation of the use of electrolytes that are effective in themselves is that they are too expensive. .

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The effectiveness of electrolyte to electrolyte depends on the concentration addicted. Of course, electrolytes ^ they are already ί high or rapid effectiveness in very low concentrations .decide, especially, suitable because they have no or only a very , little influence on the other properties of the, absorbent

! Effect materials. '' I · '

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The required concentration in one and the same electret . is still dependent on the type of application, on the conditions "the drying and the selection of the textile fibers in the absorbent material, because through all these factors the distribution in the; ·;

absorbent material is affected. . \: - ',

The dispersion adhesives which can be used according to the invention are ins, - .. '., special elastomer latices, preferably latices based on! ' Natural rubber and their blends with synthetic latices «-

rubbers and / or resins. . , j '. ".

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The absorbent material can be smooth in the described manner and. be glued very firmly to itself and also to many other materials, j or moldings, for example with products made of plastic such as e.g. B. foils or jaus leather, leather substitute, synthetic leather, wood, stone, metal, etc. The coating of the other material with adhesive can optionally be omitted, so that its quality such. B. the ability to breathe or Pofosi -; - tat. Is not significantly reduced. As an absorbent material com-; Men also sponges, foam products, such as those based on polyurethanes, polyethers, cellulose, and the like porous and absorbent substances and .Gebilde into consideration. - ■■ "; -.

The high initial adhesion of the.-Adhesive.; • To highlight connections so that, for example, immediate further processing can be carried out when the material is still wet. So far, '■ one, however, had no way of bonding absorbent' ·· l'iaterialien using Dispersioneklebstoffen, although the, -.. .. ^[A specialist was always this unresolved problem in mind. ^: 'f -;. £

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The following examples are intended to explain the subject matter of the invention, but do not limit.

example 1

A commercially available random fiber fleece made of polyamide fibers and aoryl nitrile rubber as a binding agent with a gross weight of 250 g / m 2, it is passed through with a 10 # solution of aluminum sulfate in water Immersion impregnated, then squeezed off with a pressure of 1 'kp / cm and dried at a temperature of 110 ° C. The fleece treated in this way is v / ird with a commercially available centrifuge latex (natural rubber base; stabilized with ammonia) Thinly coated on one side and then glued by hand with the same material that was not coated.

The shear strength of the bond, measured while it was still wet, is 12 kp per 5 cm with a 2 cm wide adhesive seam. After 6 hours the strength of the meanwhile dry material increases to 35 kp / 5 cm and afterwards. A strength of 48 kg / 5 cm (all V'erxe Kintelv / erte from 'y iiessungeri) is achieved for 48 hours.

The untreated fleece produces the same result in the experiment no adhesion to stick, even after prolonged pressing by hand. When one of the bonding surfaces is lifted, the second loosens Bonding area due to its own weight of around 15 g.

Example 2

In an analogous manner, a fleece is produced as described in Example 1 with a 10 5 strength solution of magnesium sulfate under the same conditions equipped and glued.

The shear strengths achieved with the same bond area are 8 kp when wet (= initial adhesion), 54 kp after 6 hours and 54 kp after 24 hours (material cracked in all at this level).

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Claims (1)

Claim Process for bonding absorbent materials, including textile fibers and / or plastics, with the aid of dispersion adhesive © ^ characterized in that carrion absorbent "Katertel" superficially or equipped with at least one electrolyte throughout and It then or later by means of a thin dispersion adhesive glued to the same material or other substance. Ot / he January 13, 1967 909883/1023 BAD OFHClNAL