DE1404387A1 - Process for the production of objects from liquid synthetic resins reinforced with fiber material and hardened by the action of catalysts - Google Patents

Description

Method of making objects from with Fiber material reinforced, liquid and by Kata- ' Synthetic resins hardening in the action of a catalyst.

The production of objects in molds from liquid, synthetic resins hardened by the action of catalysts and reinforced with a suitable fiber material have always been associated with difficulty.

A considerable part of the production was faulty, because very often some of the fiber material in these objects is not was saturated or the surface had air pockets, which had to be repaired afterwards.

The uselessness of the defective products or the necessary The repair work that has become led to a significant Increase in production costs.

The previous evacuation of the forms has a reduction of defective products, but does not guarantee that the objects will be on the surface show no air in the chlüaee. ·

Since ee impossible iat in for at a mass production men a real high vacuum to achieve, so getting some air remains in the shape defined by the result of the etel-

different friction conditions with different-P Speed is included in the fiber material penetrating synthetic resin and then compressed.

After the resin has hardened, they become enclosed Air bubbles visible as cavities on the surface.

The phenomena described above occur in particular in the manufacture of hollow objects such as window frames, on. · »>

TJm objects made of liquid, by, action of catalysts

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hardening synthetic resins, which are bonded with fiber material, e.g. Glass fibers are reinforced without air pockets on the surface produce, according to the present invention, by inlaid fiber materials in the form on which the Outside of the object, side facing away from air-collecting spaces created in which the from, if necessary, under Liquid synthetic resin under pressure is displaced or separated Air accumulates.

Die3 is achieved by using fibers with a, for the resin has different permeability, such be inserted into the fora that the faster impregnable fibers, closer to the outside of the object lie.

A defect-free outside can also be achieved by using the synthetic resin that has a corresponding viscosity and applied to the outer wall of the mold in sufficient thickness is forced to penetrate from the mold wall into the excess fiber material and thereby to penetrate this in an appropriate strength, the non-soaked part of the fiber material as a collecting roughness for the displaced or exuding air is used.

In order to achieve a different penetration capacity, the faster impregnable parts of the fiber material, such as glass fiber mats, glass fiber fabrics or the like, have a lower value Density or a corresponding finish promoting penetration.

Of course, layers of different types can also be used Fibers that have a different penetrability fiie the synthetic resin can be used.

For example, one or more glass fiber mats that should be completely soaked in synthetic resin, on the side facing away from the surface of the object, air-permeable, Creped paper in one or more layers and / or felts, foams, textiles or Jutegev / ebe or the like. Applied will.

It is possible by arranging these fibers accordingly the leakage of plastic from the reinforcement material serving fiber materials, such as glass fiber mats,

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going to stop while the air is in, of the outside of more distant fibers can accumulate.

If these air nursing rooms are correspondingly large, then there is the possibility of objects with an outer surface that does not have any ventilation holes, even without the use of a vacuum, to manufacture.

Claims (6)

Patent a ns test 1. Process for the production of articles from fiber material reinforced, liquid and by means of catalytic converters hardening synthetic resins, characterized in that da.5 by inlaid fiber materials on the the side facing away from the outside of the object be created in which the synthetic resin, possibly under pressure, is displaced, or accumulates secreted air. 2. The method according to claim 1, characterized in that fiber materials with a different for the synthetic resin Penetration into the fona in such a way that that the faster diaphanous fibers are closer to the outside of the object. 3. The method according to claim 1 and 2, characterized in that daL < the synthetic resin, which has a corresponding viscosity and on the outer mold wall in sufficient Strength is applied, is forced by the mold wall ago to penetrate into the excess fiber material and this in the appropriate strength to soak, wobai the non-soaked part of the Taeermaterials as collecting roughness for the displaced or exuding air theJat. 4. The method according to claim 1, 2, '■} » \ , characterized in that two or more layers of different types of fiber, which have a different *? Penetration capacity for the synthetic resin autv-.eiseri can be used. S09809 / 0373 5. The method according to claim 1 _f 2, 3 and 4, characterized in that on the fibrous materials lying on the outer mold wall and serving as reinforcement material, one or more layers of a fibrous material that is difficult for the synthetic resin but easily permeable to the air rest, which serve as an air collector. 6. The method according to claim 5, characterized in that between a fiber material serving as a reinforcement and a fiber material or the like. With low density, one or more layers of a fiber material lie which are easily permeable to air, but difficult for synthetic resin. 809809/0973