DE1619244C - - Google Patents

Description

The invention relates to the use of an additional insert. This additional film, which is also used as glue layer paper, the top layer of which is called a higher film, usually has a low one Resin absorption capacity as its lower layer, paper weight, but high resin ratio. has, as a carrier web for the production of hard- It is obvious that a process is technically then Barrier or green-containing synthetic resin 5 is more cumbersome if for the surface-diluting films. remuneration an increasing number of auxiliary films

llei the surface coating of wood-based material must be turned. If you now try each other Panels, in particular chipboard, are subject to severely contradicting requirements for a barrier-free system Resin-impregnated decorative film to meet the film by having the upper side Surfaces of the wood-based panels with increased io of a carrier web weak and the lower side of the Pressed temperature. For these decorative films, carrier webs are more resinous, so that's why as hardened synthetic resins, mostly melamine formaklehydric - not a success, because in the course of drying resins used. If you press without any further auxiliary or precondensation and the compression, the made such a decorative film on the top two resin layers in the paper of the barrier film area of a wood-based panel, by walking 15 and integrating it, one obtains too high a resin Jie Adjusts the surface structure of the plate to be tempered, d. that is, the two of them in the crowd a restless and faulty surface. With a different resin layer in the paper layer Chipboard mark themselves z. B. compensate in the surface.

Shavings of wood on the tempered surface. Surprisingly, it has now been found that

In addition, since such a disk is superficial, the conflicting requirements are not met

a uniform penetration of the resin through such a barrier or primer film

Having. To reduce areas of high penetration use a multilayer paper, the top of which

Light areas with low penetration are located, the layer has a higher resin absorption capacity than its

changes the synthetic resin during curing has uneven lower layer, as a carrier sheet for the production

in the subsurface, so that in places high levels of curable synthetic resin-containing barrier

I ^: penetration \ enable in the cured surface film or primer films.

Queuing up. Since a chipboard is also used above

The compressibility of the paper can be made up of two or more different areas in terms of weight

Depending on the orientation of the chips, the result is the same or different layers,

corresponding to the compressibility and from place to 30 A two-ply paper is /. B. as duplex paper

Place different press pressure. This leads to under-known. The different resin absorption

different gloss of the coated surface. like the one layers can be on in itself

These disadvantageous phenomena are counteracted in a known manner.

by placing between the decorative film and to The resin absorption capacity is preferably

The sliding surface of the wood-based panel depends on the following properties:

so-called Barrierel.lm inserts. Such a _{barrier- Ar} , _{and Sallgbareni} g _kci , _{dcs Zc} || _stllffc ,,

1.1m! .Lightly d, e Irregularities in the freeness to be remunerated de, pulp (decreases with increasing

Surface. f: r must on the one hand as much resin _K , 7.1 n

,, ... ....,, Mumgrad),

include that it sinks in the cured state Removing Pj _gm cntgehalt of the paper (with increasing

sufficient bond with the surface of the pigment to be applied),

good plate, on the other hand the resin, suction height and porosity (increase, with increasing

such a Barncrehlm does not belong to yj.

high scm otherwise the I lar /. of the barrier film with regard to the spatial quality of the paper (decreases with increasing

Pressing 111 penetrates the decorative film and riume weight)

hiked through this. For price reasons, 45 _(ilät ' _{tc (| cs} ,, _ie ' _{rs (smk} , ,,, " _{stcipcnilcr (} , _{Ui (tc)} .

Bamercliline the cheaper non-colorless Phcnol-

formaldehvd resin used. If this colored wanders these properties are among themselves again

Phenol-formaldehyde resin in the colorless melamine- dependent on each other. Through appropriate variation

formalduliulhar / comes in, the hue of these properties can be adjusted appropriately

DekoHilms impaired, and the Dckorlilm cr / ielcn 50 different resin absorption capacities. Out

seems spotty. However, it has been found to be technically extremely technical and economical reasons

proved difficult to use the har / gchalt of such to achieve a different hat / recording

Adjust the barrier film so that it has a different degree of grind

is enough. prefer to glue individual layers to the substrate.

to bring about, but on the other hand not through the 55. ,

Beat decorative film. Determination of the hat / admission * allowance

A paper strip is turned into an aqueous one for 15 seconds

immersed resin-coated barrier film to be used, and between 64 ° / _o strength and Phenolformaldchydharzlösung

the barrier film and the surface to be coated for 15 seconds under a pressure of 10 g / cm ¹

60 pressed an additional film between the filter paper of the wood-based panel.

,. (Weight of the impregnated paper - weight of the unimpregnated paper) x 100

Resin absorption device - - ■ - - r. Weight of the unimpregnated paper

For example, the following values of unpigmented result in the case of unbleached soda kraft pulp Two-layer paper, but only those with different resin absorption capacities of the individual Layers can be used according to the invention:

table

Grind

Flttchengewicht Rmmigewichi
ami individually

Suction height
total on / on

1st layer above

Layer down

2nd layer above

Layer down

3rd layer on top

Layer down

4th layer on top

Layer down

5th layer on top

Layer down

6th layer on top

Layer down

SR = Schopper Riegler

23'SR 23 "SR

23 ° SR 40 "SR

23 "SR 40" SR

23 ¹ SR 60 ¹ SR

23 ° SR 60 "SR

23 SR 80 SR

75 g / m-75 g / m ²

75 g / m ² 75 g / m ²

¹ JO g / m ' ² 60 g / m ²

75 g / nr 75 g / m ³

90 g / m ² 60 g / m-

75 g / m ² 75 g / nr 0.64 g / cm ³
0.65 g / cm »
0.65 g / cm ¹
0.66 g / cm ¹¹
0.66 g / cm ³
0.66 g / cm ^{; 1}

0.64 g / cm ¹
0.64 g / cm ⁴

0.64 g / cm ^a 0.66 g / cnr ¹

0.64 g / cm ¹¹ 0.66 g / cm ^a

0.64 g / cm ³
0.68 g / cm ³

0.64 g / cm ¹ 0.68 g / cm ^{; 1}

0.64 g / cm x ¹
ü, i) 8 g / cm '

42/36 mm
40/32 mm
40/32 mm
37/30 mm
38/32 mm
31.'20 mm

42/36 mm 42/36 me,

42/36 mm 40/32 mm

42/36 mm 40/32 mm

42/36 mm 31/29 mm

42/36 mm 31/29 mm

42/36 mm 15/13 mm

Table (continued)

1st layer above.
Layer down

2nd layer above.
Layer down

3rd layer on top.
Layer down

4th layer on top.
Layer down

5th layer on top.
Layer down

6th layer on top.
Layer down

Total porosity individually

OOOccm / min. ¹ J (X) can / min. KKK) ecm Min. 450 ecm; M in. 5 (K) CCmZMiIi. IHOOccm / min. 18 (M) ccm / min.

lSOOecm / min.

ISOOccni / min.
12 (M) ecm / M in.

45 () cc / Miii.
SOOcem / min.

ecm / min.
200ccm / min.

llar / uiifnahineangebote
Concern a / a

150 ""
140 ",,
Π0 ""

105%

150 '",,
150%

150 "./ ,,
130%

l50 ° / " l30 "/"

150 ° ',. H 5%

150% 85%

150 "/ _n
60'V _n

The paper crfindiingsgcmäß / ti used, / .. as the pattern 5 after the table is so quickly passed through a sviilirig alcoholic I larzlösung having a solids content of 65%, Dall enters the llarz.wanne no complete impregnation. The Tränk / cit is 3 to 5 seconds. The application is dosed by a metering roller in such a way that, after drying (3 minutes at 130 ° C.) in warm air, a film weight of 240 gZm ^{3 is} achieved.

Into the upper lipid layer with the larger resin absorbing agent penetrates a dosed, upright volume of oil completely, without being sufficient for a saturation of the layer. The lower l'apicre, with the lower resin absorption capacity , now absorbs part of the dosed, rising March until it is saturated. The rest, around 15g / ni *, remains on the surface.

Hs is not to achieve the desired effect It is necessary that free markings remain on the lower surface of the films in order to make them self-adhesive close. Rather, it is sufficient that the lower layer is significantly richer in resin, that is, more saturated, than the upper layer Paper layer.

The film produced using the paper to be used in accordance with the invention is also suitable as an undercoat film, which is pressed onto a wood-based panel in a manner known per se and then covered with a layer of puckering. Compared to the conventional "Cirundierlilmen" which s ^first-hamlet not contain enough resin to be or self-adhesive, if they are to be self-adhesive, only by a Doppeltränk- or -besthichtungsprozcll, de. is naturally more complex than a one-off

y> impregnation, can be produced, the using the product to be used Laminated paper produced HIm has two main advantages:

1. The film produced with the multi-layer paper through a single impregnation allows secure gluing without the aid of an *. Wet glue or additional auxiliary glue film.

2. When using the with the inventive Multilayer paper is made of film a copy of for laminating the Cold-curing or hot-curing glue resins used on the respective substrate or the primer film impregnating resin safely avoided, so that it also to the in practice coming malfunctions, such as contamination or sticking of press plates, can't come.

The iuidifolgeiule Heispiel serves animal further l'.rlüiilcrung of ^l: .r (indungsgedankens.

example

a) Manufacture of the impregnated paper
r.in 150 g / m-heavy paper, according to paper no. 5 of the table, with the 45 ⁿ / _n solution of a commercially available urea-formaldehyde resin, which additionally contains 0.1 "/" NH ₄ CI (based on The impregnated paper produced in this way has a weight of 250 g / m ² after drying with a volatile component content of 4.5 ° / "(measured by drying for 10 minutes at 160 ° C. in a circulating air drying cabinet ).

b) Lamination of chipboard with the impregnated paper produced according to a)

The impregnated paper produced according to a) is cut to a suitable roll, placed on a commercially available 3-ikhitiUen chipboard and, with the help of matt contact plates, at a pressure of 5 kp / cm ^s , a temperature of 120 "C for 2 minutes in a heatable verprelM press. It is hei (.l taken out to obtain a refined chipboard with optically uniform, opaque surface results, which 'is good sandable us.ind paintable. the bond between the film and clamping plate (excellent than 90 ° / ₀ wood failure).

Claims (1)

Claim: Use of a multilayer paper, the top layer of which has a higher resin absorption capacity as the lower layer thereof, as a carrier web for the production of curable synthetic resin containing barrier or primer films.