DE19954239B4 - Toys and toy moldings, namely dolls, toddler or baby toys with possible oral contact, basic material for such toys or toy moldings and methods for producing toys and toy moldings, which at least partially made of plastic - Google Patents

Abstract

toys and toy moldings, namely Dolls, toddler or baby toys as hollow parts with possible oral contact, at least partially made of plastic by plasticizer-free plastic, preferably polyurethane with Restelastic properties in the cured state, the hardness of the Moldings in the range between 40 and 90 Shore A hardness, preferably is at 70 shore-A.

Description

The This invention relates to toys and toy moldings, namely dolls, Toddler or baby toy with possible oral contact, at least partly made of plastic, a basic material for such Toys or toy moldings and a method of manufacture of toys and toy moldings, namely dolls or the like Toys that pose the risk or possibility of oral contact consists.

toys and toy moldings, in particular dolls made of plastic material are known.

Out establish the processability is preferred as the material to be used Polyvinyl chloride (PVC) use. In soft PVC come as a plasticizer phthalic acid, organophosphate or esters of aliphatic dicarboxylic acids are used. By the Plasticizer can be the flexibility and tensile strength of the PVC material in a wide range. Soft PVC let yourself process to extruded or injection-molded moldings, including Filling and Adjuvants can be added especially the haptic or the color properties of the later To adapt the product accordingly.

at Toys sold by toddlers or babies, e.g. in the form of teething rings, must be used by oral contact with the risk of that softener shares leak out and be absorbed by the child, reducing health damage can result.

So far However, known plasticizer-free plastics have the disadvantage on that this especially in the toy doll industry not or only extremely bad are to be processed, the properties obtained not on meet the high product requirements. In addition, arise at the Production by modified technological processes higher Costs that preclude wider use.

From the DE 37 37 553 A1 is a soft film web for the production of children's toys previously known. This film web is used to produce blanks for so-called adhesive games, for which purpose the finished film web is laminated on smooth cardboard and printed with motifs and thereafter punched out.

Softening Ingredients containing ingredients are, for example, the WO 95/26995 A1 removable.

In teaching after the DT 24 02 316 A1 it is a method of creating limbs and body parts of toy figures. Specifically, there is proposed that is applied to a polyurethane foam core, a coating of a vinyl resin foam. In this case, the outer coating is first to be produced in a rotary spin process in an outer shape of the part to be produced, which is then filled in the same form, the core-forming mixture and solidified.

It is therefore an object of the invention, toys and toy moldings, namely To indicate dolls, toddler or baby toys made of a plastic material that is safely in oral contact with the child or toddler can come, with the toys or toys moldings cost at least partially manufactured using known and established technologies can.

Farther should be a basic material for Toys and toys moldings that become one plasticizer-free end product leads. Ultimately, it is an object of the invention, based on previously introduced Technologies cost-effective process for the manufacture of toys and toy moldings, namely dolls or the like to create toys, here too the goal exists to provide a plasticizer-free end product.

The solution The object of the invention is carried out with an object after each one of the independent claims 1 and 2 or by a method as defined in claim 5, wherein the dependent claims expedient embodiments and Developments include.

Accordingly, there is the basic idea of the invention therein, the toys and toy moldings for making dolls from a plasticizer-free plastic, preferably Polyurethane with residual elastic properties in the cured state to manufacture.

The Hardness of Moldings for the production of the final product lies in the range between 40 and 90 Shore-A, preferably at 70 Shore-A.

As inventive raw material for the toys and toy moldings is a first and a second liquid reactive component.

The first component is a polyol with hydroxyl groups as functional Groups and additives. The additives are mixed in such quantities that the formulated first component has a viscosity in the range of 300 to 3000 m · Pas, being the functionality the first component is greater than 2.

The second component is an isocyanate or a prepolymer on the Base of 4,4 'diphenylmethane diisocyanate with reactive NCO groups. The NCO content is between 20 and 30, where the functionality with 2 or greater 2 is selected. The second component is also liquid medium or low molecular weight Substance before.

The first and second components are in a mixing ratio of 100: 30 to 100: 70 mixed, the concrete mixing ratio depending is determined according to the type of toy molding.

When Additives for the first component are chain extenders, catalysts, stabilizers, Water binders, color pastes or dyes, brighteners, antioxidants, Perfumes, fillers or reinforcing materials as well as internal release agents are used. Aim of the additives is it among other things, one for Dolls natural To ensure appearance or a corresponding feel.

at the method of manufacturing toys and toy moldings, in particular dolls or similar toys, which at least partially made of plastic, are initially two liquid thermoreactive Components prepared by a later polyaddition to connect to a high molecular weight material.

The recycled liquid thermoreactive components are mixed without bubbles, the Mixture then in a provided with a release agent, preferably Hollow form is discharged. Subsequently, a hurling takes place the mixture in the mold, whereby heat energy, e.g. over one Industrial furnace, fed becomes. It sets hereafter the thermoreaction of the mixture, wherein as a result, a monomer-free end product, namely polyurethane with mixing ratio-related adjustable residual elastic properties by a corresponding Reaction arises.

To Removal of the parts from the mold is a further processing of this possible in a conventional manner.

When first liquid Component is analogous to the versions to the base a polyol with hydroxyl groups as a functional unit and additives used, wherein the viscosity of the first component in Range is located between substantially 300 to 3000 m · Pas.

When second liquid, Medium to low molecular weight component is an isocyanate or a prepolymer based on 4,4 'diphenylmethane diisocyanate with reactive NCO groups used.

The mixing ratio will be executed considering of the kind and later Properties of the molded part to be manufactured, where free OH groups are ligated by NCO groups.

According to the invention is next the thermal reaction in the oven, a post-curing of the moldings at room temperature provided so that the Properties, in particular the tear strength of the respective Molding can be improved.

Farther it is possible, the heat supply over the Time to control and provide thermal breakpoints.

The with the raw material according to the invention The toys produced by the method described, in particular Dolls, own the desired elasticity and a pleasant feel with optimal playing characteristics. By the plasticizer-free plastic material has no negative effects then when the doll or toy comes in oral contact.

The Invention will be explained below with reference to an embodiment.

At the embodiment is assumed by the doll production, whereas contrary to previously used PVC materials on a polyurethane-plastic material is turned off.

When Starting material are two liquid reactive components to disposal, which by a chemical reaction in the form to a corresponding Tighten new material.

The first component is a polyol which functions as functional groups Contains hydroxyl groups. Besides, they are in the first component the necessary additives, such as chain extenders, Catalysts, stabilizers, water binders and color pastes intended. As further additives, brighteners, antioxidants, Perfumes, fillers or reinforcing materials as well as additives intended to influence the feel as well as internal release agents be.

It It should be noted that the Add additives only in such amounts that the formulated first component a viscosity in the range between 300 and 3000 m · Pas and still like a liquid behave and mix accordingly.

The functionality the first component is over the value 2, so that the Requirements for a spatial Networking are given.

at the second component is isocyanate or a prepolymer based on 4,4 'diphenylmethane diisocyanate with reactive NCO groups.

Of the NCO content is between 20 and 30, with the functionality being 2 or is greater than 2. The second component is also liquid medium or low molecular weight Substance before.

To a bubble-free mixing with a predetermined mixing ratio is discharged the mixture into the mold, in particular a mold. The mixture is adjusted so that the desired degree of softness of the later play dolls after a given reaction time, e.g. in a thermal industry oven and a subsequent one postcure is reached at room temperature.

The mixing ratio from first to second component is, for example, 100: 60. An e. Doll's head without major undercuts can in a Shore A hardness be driven from 60 to 85.

To note that the mixing ratio also to vote like that is that all free OH groups are bound by an NCO group.

To the introduction of the mixture in the provided with a release agent Hollow mold, the mold is closed and there is a rotation in at least two axes with simultaneous heat supply, i. it will be a hurling the liquid mixture performed.

The thermoreactive low or medium molecular weight starting components react by a known polyaddition reaction to a quasi monomer-free end product consisting of only one single macromolecule, wherein after the reaction no more free reactive groups present are.

Of course you can too simultaneously filled several forms with the reaction mixture and a suitable mechanical device in a rotational movement become. By varying the thermal conditions and the rotational speeds let yourself achieve optimal shaping depending on the doll part or doll size. The individual doll parts, such as arm, leg, head, trunk and more Small parts can in the manner described above as a cup-shaped hollow parts made of correspondingly solid material.

The Characteristics of the toy molding material range from soft until hard elastic, so that typical Toy dolls with properties similar to soft PVC, but without harmful plasticizer components can be produced. A preferred hardness of the material is in Range between 40 and 90 Shore-A, especially at 70 Shore-A.

Claims (9)

Toys and toy moldings, namely dolls, Toddler or baby toys as hollow parts with possible oral contact, at least partially made of plastic by plasticizer-free plastic, preferably polyurethane with Restelastic properties in the cured state, the hardness of the Moldings in the range between 40 and 90 Shore A hardness, preferably is at 70 shore-A. Basic material for Toys and toy moldings according to claim 1, marked by a first and a second liquid reactive component, wherein the first component is a polyol having hydroxyl groups as functional Groups and additives is added, adding the additives in amounts such that the formulated first component a viscosity in the range of 300 to 3000 m · Pas has and functionality the first component is greater than 2; in which furthermore, the second component is an isocyanate or a prepolymer based on 4,4 'diphenylmethane diisocyanate with reactive NCO groups and a functionality of 2 or greater, and that as Additives for the first component chain extender, Catalysts, stabilizers, water binders, color pastes or Dyes, whiteners, antioxidants, fragrances and / or fillers and reinforcements as well as internal release agents are used. Basic material according to claim 2, characterized that the NCO content of the second component substantially between 20 and 30 lies. Basic material according to one of claims 2 or 3, characterized by a mixing ratio the first to the second component in the range 100: 30 to 100: 70th Method of making toys and Molded toy parts, namely dolls, toddler or baby toys as hollow parts with possible oral contact, at least partially made of plastic, characterized by the following steps: - Preparation of two liquid thermoreactive components, which are able to crosslink by later polyaddition to a high molecular weight material ; Bubble-free mixing of the components and discharge or introduction of the mixture into a mold preferably provided with a release agent; Ejection of the mixture in the mold by multiaxial rotation with the application of heat energy, whereby the thermoreactive low or medium molecular weight starting components react to a momomerfreien end product, namely polyurethane, with adjustable rest elastic properties, and - removal of the parts from the mold and further processing of these in known manner, wherein - is used as the first liquid component, a polyol having hydroxyl groups as a functional unit and additives and the viscosity of the first component in the range between substantially 300 to 3000 m · Pas, - as the second liquid, medium to low molecular weight component an isocyanate or prepolymer based on 4,4'-diphenylmethane diisocyanate with reactive NCO groups is used and - the mixing ratio of the first to the second component at substantially 100: 30 to 100: 70 depending on the nature of the molded part to be produced, wherein fr OH groups are linked by NCO groups. Method according to claim 5, characterized in that that the Thermal energy fed through an oven being, with a post cure the moldings at room temperature. Method according to claim 5, characterized in that that the NCO content is set to between 20 and 30. Method according to one of claims 5 to 7, characterized, that when Additive is selected from at least one of the following: chain, Catalysts, stabilizers, water binders, dyes or Color pastes, whiteners, antioxidants, fragrances, fillers and / or reinforcing substances as well as fabrics for haptic improvement and internal release agents. Method according to Claim 6, characterized that the Heat supply over the Time is controlled and breakpoints are given.