DE202004016363U1 - Transparent, translucent or covered plastic materials colored by coloring agent, useful as molded articles, semi-finished material or lacquer coatings, comprises nano particles of laser sensitive particles, which are weldable by laser - Google Patents

Abstract

Transparent, translucent or covered plastic materials (I) colored by coloring agent, comprises nano particles of laser sensitive particles, which are weldable by laser.

Description

The The present invention relates to colorants transparent, translucent or covered dyed plastic materials, by a content of nanoscale laser-sensitive particles laser welding and a process for producing such plastic materials and their use.

The welding of plastic parts by means of laser energy is known per se. The Laser weldability is by absorbing the laser energy in the plastic material either directly by interaction with the polymer or indirectly with one causes the plastic material added laser-sensitive agent. The laser-sensitive agent may be an organic dye or a Pigment, which by local absorption of the laser energy Heating the plastic causes. When laser welding is the plastic material by absorption of the laser energy in the joining area warmed up so much that the material melts and weld both parts together.

In In practice, the principle of compounding between joining partners is based during laser welding, the existence the laser source facing joint partner one for the light from the laser source, which has a specific wavelength, has sufficient transparency so that the radiation the underlying joint partner reaches where it is absorbed. As a result of this absorption will be Heat released, so that in Contact area of the joining partners not only the absorbent, but also the laser transparent Melt material locally and partially mix, thereby after cooling a compound is created. Both parts will result in this Welded together.

The laser weldability depends on the nature of the plastic materials or the polymers on which they are based, on the nature and content of any laser-sensitive additives and on the wavelength and radiation power of the laser used. In addition to CO ₂ and excimer lasers, Nd: YAG lasers (neodymium-doped yttrium-aluminum Garnet lasers) with the characteristic wavelengths 1064 nm and 532 nm as well as, more recently, diode lasers are increasingly being used in this technique.

Laser weldable plastic materials, the laser-sensitive additives in the form of dyes and / or pigments generally indicate a more or less pronounced coloring and / or intransparency. In practice, the equipment of the most frequently used as the laser-absorbing molding compound for laser welding by introducing soot.

In DE 10054859 A1 a method for laser welding of plastic moldings is described, wherein the laser beam is passed through a laser-transparent molded part I and in a laser-absorbing molded part II causes heating, whereby the welding takes place. The moldings contain such coordinated laser-transparent and laser-absorbing dyes and pigments such as carbon black in particular, that a homogeneous color impression is formed. The material is not transparent by nature. Since carbon black already causes a strong blackening in low concentration, only dark colors or shades of gray can be realized for the product. Furthermore, it is currently possible to weld transparent or laser-transparent materials on covered dyed materials.

Basically, according to the doctrine of DE 10054859 A1 the laser-transparent joining partner and the laser-absorbing joining partner are adjusted in the same color. For this purpose, however, completely different colorants are needed. The skilled person depends here on trying out.

such same color settings with different colorants have but usually a different aging behavior under environmental influence on, so that in use and over time different color changes result.

The Joining Laser welding of two plastic components with color adjustment white / white, same Color / same color, with particularly bright color settings difficult are, or transparent on white or bright color settings is only unsatisfactory, difficult or by laser welding not possible at all. There is therefore a need for plastic materials of the mentioned Combinations that can be joined by laser welding.

Out The prior art is transparent colored, translucent colored and covered colored laser-weldable Plastic materials with precisely defined, freely selectable Color, in particular those which also have weathering and resistant to aging are not known.

Of the The present invention was therefore based on the task laser-weldable, by colorant transparent, translucent or covered colored plastic materials - in particular those with light shades - provide. These should be laser-sensitive additives for plastic materials be found, with which they can be made laser weldable, without that the Transparency and / or the color of the material is impaired.

The The present invention describes plastic materials comprising contain laser-sensitive additive, which is the intrinsic color of the plastic unaffected. This applies both to the coloring and to the aging behavior. The plastic materials contain dyes in the basic equipment and / or pigments to adjust the desired color or coverage, which are laser-transparent per se. For the purpose of laser welding contains the laser-absorbing joining partner from this plastic material, the laser-sensitive additive.

Surprised was found that through Colorants transparent, translucent or covered colored plastic materials by a content of nanoscale laser-sensitive particulate fillers can be made laser markable and / or laser weldable, without that the Color and / or transparency are affected.

object The invention are thus transparent by colorant, translucent or covered colored Plastic materials, characterized in that they pass through a content of nanoscale laser-sensitive particles are laser weldable.

The Invention is based on the finding that the laser marking from the Prior art known laser-sensitive pigments with respect to their Particle size and their Morphology not for transparent systems are suitable because they are the critical size of a Quarter of the wavelength Of the visible light of about 80 nm usually exceed significantly. Although laser-sensitive pigments with primary particles below 80 nm particle size are known, however, these are not in the form of isolated primary particles or smaller aggregates, but are, as in the case of Soot, only as highly aggregated, partially agglomerated particles with distinct larger particle diameter available. The known laser marking pigments therefore lead to a not insignificant Scattering of the light and thus the haze of the plastic material.

The Invention is further based on the finding that the from the State of the art known laser marking pigments due to their Own color and its insufficient Dispersibility the turbidity of the Increase material, falsify the color of the material and make color corrections necessary, but the color correction is not satisfactorily succeeds and deviations from the desired Color must be accepted.

According to the invention the plastic materials, especially those that in itself a Have transparency or translucency, and which are otherwise colored, white or covered colored are nanoscale laser-sensitive particulate additives added to these laser welding close.

Under Laser-sensitive nanoscale particulate additives are all inorganic Solids such as metal oxides, mixed metal oxides, complex oxides, Metal sulfides, borides, phosphates, carbonates, sulfates, nitrides, etc. and / or mixtures of these compounds to be understood in the characteristic Wavelength range of absorb laser and are thus able to in the plastic matrix in which they are embedded, a local warming to produce, which leads to the melting of the plastic material.

Under nanoscale is to be understood that the biggest dimension the discrete laser-sensitive particles smaller than 1 micron, ie in Nanometer range is. This size definition refers to this on all possible Particle morphologies like primary particles as well as any aggregates and agglomerates.

Prefers is the particle size of the laser-sensitive Particles 1 to 500 nm and in particular 5 to 100 nm. When the Particle size below 100 nm, the particles are no longer per se visible and affect Color and transparency of the plastic matrix is not.

In the plastic material is the content of laser-sensitive particles expediently 0.0001 to 0.1 wt .-%, preferably 0.001 to 0.01 wt .-%, based on the plastic material. In this concentration range is usually and for all in Asked plastic materials sufficient laser weldability the plastic matrix causes.

at suitable choice of particle size and concentration in the specified ranges is also transparent matrix materials an impairment excluded intrinsic transparency. So it is useful for laser-sensitive Pigments with particle sizes over 100 nm to choose the lower concentration range, while particle sizes below 100 nm also higher Selected concentrations can be.

When nanoscale laser-sensitive particulate additives for the production of laser-weldable plastic materials colored transparent, translucent or covered by colorants preferably doped indium oxide, doped tin oxide, doped Antimony oxide and lanthanum hexaboride into consideration.

Especially Suitable laser-sensitive additives are indium tin oxide (ITO) or antimony tin oxide (ATO) as well as doped indium or antimony tin oxides. Especially preferred is indium-tin oxide and this in turn by a partial Reduction process available "blue" indium tin oxide. The unreduced "yellow" indium tin oxide can at higher Concentrations and / or particle sizes at the top of a visually noticeable slightly yellowish hue of the plastic material cause, while the "blue" indium tin oxide to no perceptible color change leads.

The used according to the invention Laser-sensitive particles are known per se and also in nanoscale Shape, ie as discrete particles with sizes below 1μm and in particular in the preferred here size range commercially available, typically in the form of dispersions or in the form of easily redispersible powdered agglomerates of nanoscale particles.

in the As a rule, the laser-sensitive particles are in their delivery form as agglomerated particles, such as agglomerates, whose particle size is between 1 μm to can amount to several mm. These can be by means of the method according to the invention with high shear in the plastic matrix, whereby the agglomerates are decomposed into the nanoscale primary particles.

The Determination of the degree of agglomeration takes place in the sense of DIN 53206 (from August 1972).

Nanoscale particles, in particular metal oxides, can be prepared, for example, by pyrolytic processes. Such methods are for example in EP 1 142 830 A . EP 1 270 511 A or DE 103 11 645 described. Furthermore, nanoscale metal oxides can be produced by precipitation processes, such as in DE 100 22 037 described.

The nanoscale laser-sensitive particles can be incorporated into virtually any plastic system to impart laser weldability. Typical are plastic materials in which the plastic matrix on poly (meth) acrylate, polyamide, polyurethane, polyolefins, styrene polymers and styrene copolymers, polycarbonate, silicones, polyimides, polysulfone, polyethersulfone, polyketones, polyether ketones, PEEK, polyphenylene sulfide, polyester (such as PET, PEN, PBT ), Polyethylene oxide, polyurethane, polyolefins, cycloolefin copolymers or fluorine-containing polymers (such as PVDF, EFEP, PTFE). It is also possible to incorporate them into blends containing the above-mentioned plastics as components, or into polymers derived from these classes which have been modified by subsequent reactions. These materials are widely known and commercially available. The advantage of the present invention the nanoscale particles is used in particular for colored transparent or translucent plastic systems such as polycarbonates, transparent polyamides (for example Grilamid ^® TR55, TR90, Trogamid ^® T5000, CX7323), polyethylene terephthalate, polysulfone, polyethersulfone, cycloolefin copolymer (Topas ^®, Zeonex ^®), polymethyl methacrylate and their copolymers, since they do not affect the transparency of the material. Furthermore, mention should be made of transparent polystyrene and polypropylene, furthermore all semicrystalline plastics which can be processed into transparent films or shaped articles by the use of nucleating agents or special processing conditions. Furthermore, colored covered plastics can be equipped with the nanoscale laser-sensitive pigments.

The Polyamides are generally made from the building blocks: branched and unbranched aliphatic (6 C to 14 C atoms), alkyl-substituted or unsubstituted cycloaliphatic (14 C to 22 C atoms), araliphatic Diamines (C14 - C22) and aliphatic and cycloaliphatic dicarboxylic acids (C6 to C44); latter can partially replaced by aromatic dicarboxylic acids. Especially can the transparent polyamides additionally consist of monomer building blocks with 6 C atoms, 11 C atoms or 12 C atoms composed of lactams or derive ω-aminocarboxylic acids.

Preferably, but not exclusively, the polyamides are prepared from the following building blocks: Laurolactam or ω-aminododecanoic acid, azelaic acid, sebacic acid, dodecanedioic acid, fatty acids (C18 - C36; example, under the trade name Pripol ^®), cyclohexane dicarboxylic acids, partial or partial replacement of these aliphatic acids by isoterephthalic acid, terephthalic acid, naphthalenedicarboxylic acid, tributylisophthalic. Furthermore, use is made of decanediamine, dodecanediamine, nonanediamine, hexamethylenediamine branched, unbranched or substituted, and also as representatives of the class of alkyl-substituted / unsubstituted cycloaliphatic diamines bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane, bis (4-aminocyclohexyl) propane, bis (aminocyclohexane), bis (aminomethyl) cyclohexane, isophoronediamine or substituted pentamethylenediamines.

Examples of corresponding transparent polyamides are approximately in EP 0 725 100 and EP 0 725 101 described.

Especially preferred are colored transparent, translucent or muted Plastic systems based on polymethyl methacrylate, bisphenol A polycarbonate, Polyamide and so-called Cycloolefincopolymere of norbornene and α-olefins with Help the nanoscale invention Particle laser weldable can be made without impairment of color and transparency of the material.

at inked transparent, translucent and covered systems neutral Inherent color of these nanoscale laser-sensitive additives advantageous, because a free choice of color in the plastic materials is made possible.

When Dyes are those considered in the field of interest have low self-absorption between 800 and 1500 nm, So are laser transparent.

to Designation of colorants is hereafter the nomenclature of the color Index (C.I.) used. All colorant names such as solvent Orange or Pigment Red 101 are C.I. Designations. (The simplicity the name component C.I. in the following table 1 omitted)

Table 1: Laser transparent colorants

Some said colorants can exist in different structures that are slightly different from each other differ. For example Pigments may be laked with different metal ions, creating different Forms of the pigment arise. These forms are prepared according to C.I. by Attach a A colon and a numeral, e.g. Pigment Red 48 for that with Sodium Laked Pigment, Pigment Red 48: 1 Laked with Calcium, Pigment Red 48: 2 laked with barium, Pigment Red 48: 3 laked with strontium, Pigment Red 48: 4 laked with magnesium. The C.I. Colorant designations are to be understood to include all forms or structures include. They are listed in the Color Index.

The Laser-weldable plastic materials according to the invention are typically in the form of shaped bodies or semi-finished products. Laser-weldable paint coatings are also possible.

The production of the laser-weldable plastic materials according to the invention is carried out in a manner known per se according to conventional and customary techniques and methods in plastics production and processing. It is possible to enter the laser-sensitive additives before or during the polymerization or polycondensation in individual reactants or Eduktgemische or even add during the reaction, the known in the art specific manufacturing process for the plastics in question are used. In the case of polycondensates such as polyamides, for example, incorporation of the additive into one of the monomer components can take place. This monomer component can then be used with the rest Reactants are subjected in a conventional manner a polycondensation reaction. Furthermore, after the formation of macromolecules, the resulting high molecular weight intermediates or end products can be mixed with the laser-sensitive additives, it also being possible in this case for all methods familiar to the person skilled in the art to be used.

ever according to the recipe of the plastic matrix material are liquid, semi-liquid and solid formulation ingredients or monomers and optionally required Additives such as polymerization initiators, stabilizers, (such as UV absorbers, heat stabilizers), optical brighteners, antistatics, plasticizers, mold release agents, lubricants, Dispersing aids, antistatic agents but also fillers and reinforcing agents or impact modifiers etc. in usual for it Devices and equipment such as reactors, stirred tanks, mixers, roller mills, extruders etc. mixed and homogenized, optionally shaped and after for curing brought. The nanoscale laser-sensitive particles are here introduced at the appropriate time in the material and homogeneous incorporated. Particularly preferred is the incorporation of nanoscale laser-sensitive particles in the form of a concentrated premix (Masterbatch) with the same or a compatible plastic material.

It is advantageous when incorporating the nanoscale laser-sensitive Particles in the plastic matrix under high shear in the plastic matrix or the liquid one monomer-containing casting recipe he follows. This can be done by adjusting the mixer, Roll mills, Extruders are made. This will cause any agglomeration or effectively prevents aggregation of the nanoscale particles to larger units; any existing larger agglomerates are crushed. Those skilled in the art are the appropriate techniques and each one to be chosen Process parameters common.

Plastic moldings and Semi-finished products are injection molded or extruding from molding materials or by casting from the Monomers and / or prepolymers available.

The Polymerization is carried out by methods known to those skilled in the art, for example by addition of one or more polymerization initiators and Induction of polymerization by heating or irradiation. For complete implementation of the monomer (s), an annealing step may follow the polymerization.

Laser weldable paint coatings are by dispersing nanoscale laser-sensitive particulate solids in conventional Paint formulations, coating and drying or curing of Lacquer coating available.

The Group of suitable paints includes, for example, powder coatings, physically drying paints, radiation-curable Paints, one- or multi-component reactive coatings such as Two-component polyurethane coatings.

To Production of plastic moldings or lacquer coatings from the nanoscale laser-sensitive particulate solids containing plastic materials can be these by irradiation weld with laser light.

The laser welding can be on a commercial Laser welding machine, e.g. a laser from the company Baasel, type StarMark SMM65, with a performance between 0.1 and 22 amps and a feed rate between 1 and 100 mm / s. In the setting of laser energy and Feed rate is to pay attention to the performance not too high and the feed rate should not be too low, around unwanted Avoid charring. Too low power and too high feed rate can the welding be inadequate. Also this can the required settings in individual cases readily determined become.

to welding of plastic moldings or semi-finished plastic is required that at least one of the parts to be joined at least in the surface area the joining surface inventive plastic material exists, whereby the joint surface with Laser light, so irradiated that the laser-transparent part is irradiated before the laser beam hits the laser absorbing part of the plastic material, causing this is so strongly heated at the phase boundary that both parts weld together. A certain contact pressure is required to a material connection to obtain.

example 1

Production of a color-transparent, colored translucent or covered colored laser-sensitive plastic molding

A colored transparent, colored translucent or covered colored plastic molding compound, containing a laser-sensitive nanoscale pigment, is in one Melted extruder and molded into plastic moldings in an injection mold Shape of platelets sprayed or extruded into sheets, films or tubes.

The Incorporation of the laser-sensitive pigment in the plastic molding compound occurs under high shear around any agglomerated particles in nanoscale primary particles disassemble.

Production of the laser-absorbing ( ^a ) molding compositions:

Embodiment A ^a

As the plastic molding is Trogamid ^® CX 7323, a commercial product of Degussa AG, High Performance Polymers Division, Marl, inserted and with the nanoscale indium tin oxide Nano ^® ITO IT-05 C5000 Nano gate as laser-sensitive pigment in a concentration of 0.01 wt % and with CI Pigment Red 166 (Scarlett RN, from Ciba Specialty Chemicals) as a laser-transparent colorant in a concentration of 0.01 w%, compounded on an extruder Berstorff ZE 25 33 D at 300 ° C and granulated.

Embodiment B ^a

As a plastic molding material Vestamid L1901, a commercial product of Degussa AG, High Performance Polymers, Marl, used and with the nanoscale indium tin oxide Nano ^® ITO IT-05 C5000 from Nanogate as a laser-sensitive pigment in a concentration of 0.01 wt .-% and with CI Pigment Red 166 (Scarlett RN) from Ciba Specialty Chemicals) as a laser-transparent colorant in a concentration of 0.01% by weight, compounded on a Berstorff ZE 25 33 D extruder at 260 ° C. and granulated.

Embodiment C ^a

As a plastic molding material Vestamid L1901, a commercial product of Degussa AG, High Performance Polymers, Marl, used and with the nanoscale indium tin oxide Nano ^® ITO IT-05 C5000 from Nanogate as a laser-sensitive pigment in a concentration of 0.01 wt .-% and with CI Pigment Green 7 (Irgalite Green GFNP, from Ciba Specialty Chemicals) as a laser-transparent colorant in a concentration of 0.01 w%, compounded on a Berstorff ZE 25 33 D extruder at 260 ° C and granulated.

Embodiment D ^a

The plastic molding compound used is PLEXIGLAS ^® 7N, a commercial product of Degussa AG, Methacrylate Division, Darmstadt. As a laser-sensitive pigment nanoscale indium tin oxide Nano ^® ITO IT-05 is C5000 from Nano gate in a concentration of 0.01 wt .-% and with CI Pigment Red 166 (Scarlett RN, from Ciba Specialty Chemicals) as the laser-transparent colorant in a concentration of 0 , 01% by weight, compounded on an extruder Berstorff ZE 25 33 D at 250 ° C. and granulated. In the case of extrusion, a higher molecular weight molding compound of the type PLEXIGLAS ^® 7H may be advantageously employed.

Embodiment E ^a

The plastic molding compound used is PLEXIGLAS ^® 7N, a commercial product of Degussa AG, Methacrylate Division, Darmstadt. As a laser-sensitive pigment nanoscale indium tin oxide Nano ^® ITO IT-05 C5000 Nano gate in a concentration of 0.01 wt .-% and with CI Pigment Pigment Blue 29 (ultramarine blue) as the laser-transparent colorant in a concentration of 0.01 w%, on an extruder Berstorff ZE 25 33 D compounded at 250 ° C and granulated. In the case of extrusion, a higher molecular weight molding compound of the type PLEXIGLAS ^® 7H may be advantageously employed.

Embodiment F ^a

The plastic molding compound used is PLEXIGLAS ^® 7N, a commercial product of Degussa AG, Methacrylate Division, Darmstadt. As a laser-sensitive pigment nanoscale indium tin oxide Nano ^® ITO IT-05 is C5000 from Nano gate in a concentration of 0.01 wt .-% and with CI Pigment Green 7 (Irgalite Green GFNP, from Ciba Specialty Chemicals) as the laser-transparent colorant in a concentration of 0.01 w%, compounded on an extruder Berstorff ZE 25 33 D at 250 ° C and granulated. In the case of extrusion, a higher molecular weight molding compound of the type PLEXIGLAS ^® 7H may be advantageously employed.

The preparation of the corresponding laser-transparent ( ^t ) molding compositions A ^t to F ^t is carried out according to the above embodiments A ^a to F ^a , with the only difference that no laser-sensitive pigment is added.

Example 2

Production of a color-transparent, colored translucent or muted colored laser-sensitive molded PMMA semifinished

In 1000 parts of PMMA / MMA prepolymer solution having a viscosity of 1000 cP the nanoscale indium tin oxide ITO Nano ^® IT-05 is dispersed C5000 from Nanogate as laser-sensitive pigment in a concentration of 0.01 wt .-% together with dispersants and colorants. After addition of 1 part AIBN is filled into a chamber and polymerized at 50 ° C in a water bath for 2.5 h. By subsequent annealing at 115 ° C in a drying oven remaining monomers are reacted. A laser-absorbent semi-finished product is obtained.

to Production of a laser-transparent semi-finished product is the approach without laser-sensitive pigment produced.

If a transparent semifinished product is to be produced, it is preferable to use a soluble colorant from the table (term "solvent") .White-scattering micronized dye pigments, such as, for example, ultramarine blue, can be used for almost transparent settings, and more scattering pigments are suitable for translucent or mapped variants The assignment of the colorants is known to the person skilled in the art Examples and references for the polymerization are described, inter alia, in US Pat DE 43 139 24 given.

option A

When Laser transparent colorant is C.I. Pigment Red 166 (Scarlett RN, from Ciba Specialty Chemicals) used in a concentration of 0.01 w%.

Variant B

When Laser transparent colorant is C.I. Pigment Blue 29 (ultramarine blue), from Ciba Specialty Chemicals) used in a concentration of 0.01 w%.

Variant C

When Laser transparent colorant is C.I. Pigment Green 7 (Irgalite Green GFNP, from Ciba Specialty Chemicals) in one concentration used of 0.01 w%.

Example 3

Carrying out laser welding

(Cast PMMA with 0.01 wt .-% ITO content)

A colored transparent, colored translucent or covered colored laser-sensitive plastic plate (dimensions 60mm · 60mm · 2mm) of cast PMMA with an ITO content of 0.01 wt .-% with a second plastic plate of undoped colored transparent, colored translucent or im visible area of the light covered but laser transparent colored PMMA with the to be welded Flä brought into contact. The plates are so inserted into the welding holder of the Starmark laser SMM65 Fa. Baasel laser technology, that the undoped plate is on top, that is first penetrated by the laser beam. The focus of the laser beam is adjusted to the contact surface of the two plates. At the control unit of the laser, the parameters frequency (2250 Hz), lamp current (22.0 A) and feed rate (30 mms ^-1 ) are set. After entering the size of the surface to be welded (22 x 4 mm ² ), the laser is started. At the end of the welding process, the welded plastic plates can be removed from the device.

• 0 Keine Haftung.
• 1 Geringfügige Haftung.
• 2 Etwas Haftung; mit geringem Aufwand zu trennen.
• 3 Gute Haftung; nur mit großem Aufwand und gegebenenfalls mit Hilfe von Werkzeugen zu trennen
• 4 untrennbare Haftung; Trennung nur durch Kohäsionsbruch

The liability is assessed as follows:

• 0 No liability.
• 1 Slight liability.
• 2 Slight liability; to separate with little effort.
• 3 good adhesion; only with great effort and possibly with the help of tools to separate
• 4 inseparable liability; Separation only by cohesive failure

Embodiment A

Molding compound A ^a with molding material A ^t

A standard injection-molded plastic sheet (dimensions 60mm x 60mm x 2mm) of the molding compound A ^a is brought into contact with a second standard injection-molded plastic sheet of the molding compound A ^t (dimensions 60mm x 60mm x 2mm). The plates are so inserted into the welding holder of the Starmark laser SMM65 Fa. Baasel laser technology, that the plate of the molding compound A ^{t is} above, that is, first penetrated by the laser beam. At the laser control unit, the parameters frequency (2250 Hz), lamp current (22.0 A) and feed rate (10 mms ^-1 ) are set. After entering the size of the surface to be welded (22 x 4 mm ² ), the laser is started. At the end of the welding process, the welded plastic plates can be removed from the device.

It Bonding values are achieved with the grade 4 in the hand test.

Variant A1

When Colorant becomes Pigment Blue 29 (ultramarine blue) in the plastic used.

It Bonding values are achieved with the grade 4 in the hand test.

Variant A2

When Colorant Pigment Solvent Orange 60 is used in the plastic.

It Bonding values are achieved with the grade 4 in the hand test.

embodiment B

Molding compound B ^a with molding compound B ^t

A standard injection-molded plastic sheet (dimensions 60mm x 60mm x 2mm) of the molding compound B ^a is contacted with a second standard injection-molded plastic sheet of the molding compound B ^t (dimensions 60mm x 60mm x 2mm). The plates are placed in the welding holder of the Starmark laser SMM65 Fa. Baasel laser technology, that the plate of the molding compound B ^{t is} above, that is, first penetrated by the laser beam. At the laser control unit, the parameters frequency (2250 Hz), lamp current (22.0 A) and feed rate (10 mms ^-1 ) are set. After entering the size of the surface to be welded (22 x 4 mm ² ), the laser is started. At the end of the welding process, the welded plastic plates can be removed from the device.

It Bonding values are achieved with the grade 4 in the hand test.

embodiment C

Molding compound C ^a with molding compound C ^t

A standard injection-molded plastic sheet (dimensions 60mm x 60mm x 2mm) of the molding compound C ^a is contacted with a second standard injection-molded plastic sheet of the molding compound C ^t (dimensions 60mm x 60mm x 2mm). The plates are placed in the welding holder of the Starmark laser SMM65 Fa. Baasel laser technology, that the plate of the molding compound C ^{a is} on top, that is, first penetrated by the laser beam. At the laser control unit, the parameters frequency (2250 Hz), lamp current (22.0 A) and feed rate (10 mms ^-1 ) are set. After entering the size of the surface to be welded (22 x 4 mm ² ), the laser is started. At the end of the welding process, the welded plastic plates can be removed from the device.

It Bonding values are achieved with the grade 4 in the hand test.

embodiment D

Molding compound D ^a with molding compound D ^t

A standard injection-molded plastic sheet (dimensions 60mm x 60mm x 2mm) of the molding compound D ^a is contacted with a second standard injection molded plastic sheet of the molding compound D ^t (dimensions 60mm x 60mm x 2mm). The plates are placed in the welding holder of the Starmark laser SMM65 Fa. Baasel laser technology, that the plate of the molding compound D ^{a is} on top, that is first penetrated by the laser beam. At the laser control unit, the parameters frequency (2250 Hz), lamp current (22.0 A) and feed rate (10 mms ^-1 ) are set. After entering the size of the surface to be welded (22 x 4 mm ² ), the laser is started. At the end of the welding process, the welded plastic plates can be removed from the device.

It Bonding values are achieved with the grade 4 in the hand test.

embodiment e

Molding compound E ^a with molding compound E ^t

The welding is carried out analogously to the fusion of molding compound D ^a with molding compound D ^t .

It Bonding values are achieved with the grade 4 in the hand test.

embodiment F

Molding compound D ^a with molding compound D ^t

The welding is carried out analogously to the fusion of molding compound D ^a with molding compound D ^t .

It Bonding values are achieved with the grade 4 in the hand test.

Claims (13)

By colorant transparent, translucent or covered colored plastic materials, characterized in that they are laser-weldable by a content of nanoscale laser-sensitive particles. Plastic materials according to claim 1, characterized that the Particle size of the contained laser-sensitive Particle 1 to 500 nm. Plastic materials according to claim 1 or 2, characterized characterized in that Particle size of the contained laser-sensitive particles is 5 to 100 nm. Plastic materials according to claims 1 to 3, characterized in that the Content of laser-sensitive particles 0.0001 to 0.1 wt .-%, preferably 0.001 to 0.01 wt .-%, based on the plastic material. Plastic materials according to claims 1 to 4, characterized in that as nanoscale laser-sensitive particles metal oxides, mixed metal oxides, complex oxides, metal sulphides, borides, phosphates, carbonates, sulphates, Nitrides, etc. and / or mixtures of these compounds. Plastic materials according to claims 1 to 5, characterized in that Indium oxide, doped, doped as nanoscale laser-sensitive particles Tin oxide, doped antimony oxide, indium zinc oxide or lanthanum hexaboride contain. Plastic materials according to claim 6, characterized that she as nanoscale laser-sensitive particles indium tin oxide or antimony tin oxide contain. Plastic materials according to claim 7, characterized that she as nanoscale laser-sensitive particles contain blue indium tin oxide. Plastic materials according to claims 1 to 8, characterized in that the Plastic matrix on poly (meth) acrylate, polyamide, polyurethane, polyolefins, Styrene polymers and styrene copolymers, polycarbonate, silicones, Polyimides, polysulfone, polyethersulfone, polyketones, polyetherketones, Polyphenylene sulfide, polyester, polyethylene oxide, polyurethane, polyolefins, Cycloolefin copolymers or fluorine-containing polymers based. Plastic materials according to claim 9, characterized that she based on polymethylmethacrylate. Plastic materials according to claim 9, characterized that she based on bisphenol A polycarbonate. Plastic materials according to claim 9, characterized that she based on polyamide. Plastic materials according to claims 1 to 12, characterized in that as a shaped body, semi-finished products or lacquer coatings are present.