DE2036032A1 - Process for the production of colored fiber laminates - Google Patents

Description

■ · · - ■ ■ · - - ■ · ···· ■ - ■ · ■ 2Q36032

Karl tristian lobs Xrjrfyer, Viby j., Denmark

Process for the production of colored fiber laminates

The present invention relates to a method for the production of fiber laminates, in which a fibrous mass is treated in a defibering plant, the Fibers are suspended in a gas stream and this gas stream is passed through a gas-permeable mold surface, ■ so that a fiber layer forms on this surface, and wherein the fibrous layer has a binding agent for binding the fibers are fed to one another. , ■

Attempts have been made to obtain fibrous materials produced by the aforementioned process by spraying on dye solutions; on the formed layer or by soaking it in; to color in a dye solution bath. By such Färbprozesse 15 but not evenly colored products are formed, 'and when spraying a dye solution to a fiber laminate only the surface layers of the same overall · be dyed. Such a type of dyeing is insufficient if the fiber material is subsequently exposed to a partial abrasion of its surface.

The present invention is the production of Fibrous laminates in a dry process, with all Parts of the material are evenly colored.

009885/1968

. This process according to the invention is characterized in that a dye or a dye solution is added to the fiber mass fed to the defibering plant.

The addition of the dye or the dye solution can be done in various ways, but they are common Characteristic of all such methods that the dye is evenly distributed through the entire fiber layer, after this has formed on the molding surface after treating the fiber mass in the gas defibering system.

The use of a dye solution is particularly advantageous because the dye is stronger than when an I is added dry dye is bound to the fiber material. It could be assumed that the addition of a liquid • gen color solution agent difficulties in the subsequent

T 5 Treatment of the bevel in the * Eatfaseiraigsanlage arise. Amazingly, however, it has been found that the. Presence of limited fluid levels in the b.; ent fibrous pulp SiOH in fact advantageous Removing * acts as the liquid from each other, the separation of the fibers facilitates without fiber breakage. Product A no übernäSig g ^ oSissi liquid fraction _contains also 'that in the treatment of the fiber mass in the · Satfaserungsanlage sufficient heat _s is produced to d <sa g ^ ößtesa part DA® of the introduced liquid to verdaepfeß "as was observed _(finished it. another preferred traversing © »umt color egg ©© ^ Faserstoffb & tai is € he Dnrchfiliinmg the mass dtaek © in Färb" lösungsbadi, in eiaer such Tränk "ag is DI® Faser--

009885/1968

wet thoroughly dyed through. That’s another procedure Spraying a dye solution onto the fibrous web during their movement to the defiber removal plant. the irregular color normally produced by spraying has no influence on the state of color of the finished material, as the fiber mass is then in the machine is defibrated. The application of the dye solution to the Fiber mass web can also be made by passing through a set of rollers take place, one of the rollers is constantly moistened with dye solution. This wetting is for example possible with the help of one or more additional rollers, at least one of which is partially immersed in a dye bath.

Of the. Dye or the dye solution can also be added directly to the defibering system, if desired also together with a filler, which can then also be colored when using a dye solution. It should be noted that in certain cases of using ^: a solid dye, it may resemble a filler rather than an actual dye. However, these processes also fall within the scope of the present invention because their characteristic feature, namely the uniform and continuous coloring of the fiber material, is also achieved in these cases. ;

By adding two or more dye solutions to ^; different parts of the fiber mass, fiber materials with color mixtures can be produced.

009 8 85/1968 '

Can sole & is? Pase ^ sckichtstoffe the dye solution only a part of the ⁵ fiber measure ©.

If a watery color dissolves. ve ^ / eadet ^ rirä _} so the total amount of water added to a cellulose fiber aasse should be 30% by weight. 60 % : «A fiber mass with a higher proportion of water or: Ethanol tends to stick together and stick to the walls and moving parts of the machine during treatment in the defibering system»

A particularly favorable result is achieved when the mass to be defibrated contains about 20% by weight of water and 20 % by weight of ethanol. The defibered product contains smaller amounts of fiber dust and a higher proportion of long fibers, which increases the density and strength of the finished fiber.

■ material can be improved. Apart from ethanol, other ^can: solvents are used "However, the means used measure in any case Qiae geriagere VdfdaMpfungswiPiie as ^Wassei%. haboa vm.ü with Uass <e? Miselibar s ^ in _g mm ia Lamfe the

■ Bntfasenang «ad BeföE'dlainaag sms ¹ PoKafliefe © gmssuiiaea ait dem ^: Water veMiuasten zu

Bs is, however, norsiale ^ wsisd aiekt g # astig _D wäteeiad tea treatment in Ue ^ Satfaseraiagsaalagts das gama © Hassan ams den Fasere am weite »» The ®utS & 3® ^ t% _{material should preferably contain 5} to SO Gewielats · = ^ water 5 because such

00988H / 1968

Moist fibers less likely to - formation of fiber bundles or - lumps tend to be dry. .

The use of solvents also reduces the Uniform distribution of additives in the formed fibrous laminate favors «Surfactants can can therefore be added to the dye solution to prevent the penetration of subsequently added binders, e.g. Latex binder, to make it easier.

Catalysts can also be added to the dye solution, which can trigger the polymerization of a monomer-containing binder that is added later. When using a latex binder, it may also be advisable to add a coagulating agent to the dye solution. " .. '

The tightness of the coloring can be further fine-tuned by the Use of a binding agent or fillers from: same color as the colored fibers can be improved ",

The fiber mass used according to the invention is preferably cellulose pulp, but other fiber masses, such as, for example, waste leather fibers, can also be processed. '■

It is obvious that by adding a liquid or liquid mixture to the fiber mass achieved improved defibrillation is achieved even if none Dye or no dye solution to be defibrated

009885/1968

Mass is added.

When he £ iBcfaag will aakand the following. Described in more detail at © iels below,

Bedsgiel

A bate of cellulose fiber mass of about 2. rai thickness and with siasra Femektigfeditsgeiialt wg> ra © twa 5 % vnzrde by a bath the @ ia @ three-pronged solution of blue toilia colors around S ¹ S% 'Ätl% jl & .Yk <Qäöl eatMelto Uamittelba]? according to the YvarlGBr-gia e @ s BM © s aw ^ Ghl ± ® £ di © BaMa eia _s

Q ,.;,: ■ v: l: ⁿ ^ 3ciQlit νΐ05? _ΰ that ä <s ^ Itbe ^ scteß aa dye solution ■: "·". '..: .._ .:'ϊ;[;'Γ? ίat UiS (^ o Zisaseklieflead wiasd © die Zellnloseaass® with a · .: ;; FGststoirügQlaalt ¥ © a © toa 45 % ia die ΰΐ-lfyQ gsgelb (sa _o ö ©! ³ ! © atfasert mnd zm one P - TLl -jqBqz & M ο this Suspeiasioia ^ mrde dixrcla. A gas =

™ - · " ^ Pomfläeks headed _B & n £ which sick di © Z © 1

1, ^c q: ο SB oia @ 2> dfLaaea Sckicht with about 90 ^ F @ st ~ i, Cjzb ~, lt & bl & g <3gt <3Xio The liquid components consist of ^, as C3, 3% ¥ ass @ 2? (the remaining strength of the ¹ Z © llulos @ fa =

sena) md 5 / a ethyl alcohol

Most of the exercises Hass® added ethyl alcohol was therefore exerts examples E ATF aserwig IMD of pae'uiaatisehen Be promotion of eatfaserten Erzemgaisses eatferat "

_ 6

009 885/196 8-

Claims (10)

Patent claims 1. Process for the production of colored fiber laminates by processing a fiber mass in a defibering plant, Formation of a gas flow with fibers suspended in it, passage of this gas flow through a gas-permeable one Molding surface for the purpose of forming a fibrous material layer on the molding surface and adding a binder to the fiber layer for the purpose of binding the fibers to one another, characterized by the addition of a dye or a dye solution to that of the defibering plant fed fiber mass. · 2. The method according to claim 1, characterized in that the Fiber mass is soaked with a dye solution before being fed into the defibering system. 3. The method according to claim 1, characterized in that a Dye solution is sprayed onto the fiber mass before introduction into the defibering system. 4. The method according to claim 1, characterized in that eiae Dye solution through applicator rollers, one of which is constantly is moistened with dye solution, is applied to the continuous fibrous web. 5. The method according to claim 1, characterized in that the Color or dye solution at the same time as the Paseraasse 0 0 9 8 8 5/1968 is introduced into the defibering plant. 6. The method according to claim 5, characterized in that the color or color solution used is mixed with a filler. 7. The method according to claim 1, characterized in that two or more dye solutions to different parts of the pulp verden added. ^ 8.Verfahren according to claim 1, characterized by the use a dye solution with a mixture of water and a water-miscible solvent that of the Fibers are absorbed and have a lower heat of vaporization than water. 9. The method according to claim 8, characterized in that the fiber mass to be defibrated approx. 20% by weight ethanol and Contains 20 weight X water. r 10. The method according to claim 7, characterized in that the Dye solution as an additive, surface-active substances and / or polymerization catalysts and / or coagulants » contains medium. 00988S / ^1t ? 68