DE1056001B - Boots or shoes made from polyvinyl chloride mixtures, as well as processes and moldings for their manufacture - Google Patents

Description

BJPUBTHEiC

DES Dili? SCHER

V MTSSTMTES J

The invention relates to a boot or shoe made of polyvinyl chloride mixtures with reinforcements on the toe and / or heel area.

As in the case of boots. Or shoes, especially work boots, which are made from polyvinyl chloride mixtures using the immersion process are produced, a disproportionately rapid wear of the toe and heel areas soon leads to the uselessness of the whole shoes or boots, although the remaining parts are still in order is the reinforcement of these areas subject to special wear and tear by toe and Heel caps have become common, which are obtained as diving articles with consistently the same wall thickness Shoe upper can be retrofitted, which - ■ similar to the production of leather shoes - requires considerable assembly work. Certain games have also been suggested of diving articles to be reinforced in such a way that one clicks on the diving form in the one to be reinforced Apply a corresponding reinforcement tab or strip made of plasticized polyvinyl chloride to the area and then immerse the prepared mold in the usual dipping compound. Besides that the correct positioning of the reinforcement material on the dipping form an additional, the dipping process Required preceding process step is the achievement of a durable connection between the reinforcement parts and the dipping compound forming the upper of the shoe or boot always guaranteed.

These disadvantages are avoided according to the invention in that the toe and / or heel reinforcements a polyvinyl chloride content preferably 15 to 25% higher and one accordingly contain less plasticizer than the rest of the material used in the boot or shoe.

An even better protection against wear can be achieved according to a further characteristic of the invention, in particular in work boots, achieve that the reinforced heel with one above the Sole and approximately parallel to this with a bead-like bead from the area of the reinforced heel part externally protruding rib-like heel protection strip is provided. This heel guard, which is in In contrast to the well-known protective beads, no additional material reinforcement is caused, facilitated not only taking off the boot, but also offers considerable protection for the upper edge of the sole in the rear of the sole.

The invention also relates to a particularly advantageous method for producing the ones according to the invention Boots or shoes by dipping in polyvinyl chloride blends. This procedure is thereby characterized in that to generate the gain

made of polyvinyl chloride mixtures

as well as processes and moldings

for its manufacture

Applicant:
Heinrich Gruber, Salzburg (Austria)

Representative: Dipl.-Chem. Dr. phil. E. Sturm, patent attorney, Munich 23, Leopoldstr. 20th

Claimed priority:
Austria from August 29, 1955

Heinrich Gruber, Salzburg (Austria),
has been named as the inventor

cut the moldings used for dipping in two successive operations with the Toe or heel section dipped in a hard polyvinyl chloride mixture in an inclined position and only then immersed in a normal soft polyvinyl chloride mixture in a known manner to form the entire shoe will.

According to this process, the reinforced parts can be made in a particularly simple and economical manner Manufacture way. At the same time, you get footwear made of a homogeneous material.

The heel protection strip can be made using the dipping process described without any additional effort can be obtained immediately if a - also forming an object of the invention - Moldings are used, which in its heel part with a rib-like protruding Edge strip is fitted. During the diving process, the one that protrudes outwards like a bead Heel protection strip without any additional material thickening going beyond the reinforcement of the heel section.

In the drawing is an embodiment of the invention in

Fig. 1 shows a boot with a heel protection strip in one Longitudinal section shown;

FIG. 2 shows a side view of the lower part of the last, which is used for the manufacture of the one shown in FIG shown boot is required in the immersion process.

'' ■ - "90» 507/202

Claims (4)

The boot consists of the upper part 1, the shaft of which is obtained in a known manner in a dipping process as a uniform layer 6 made of soft polyvinyl chloride; According to the invention, this layer is provided with reinforcements Z, 4 made of hard polyvinyl chloride at the toe and heel. Depending on requirements, such a reinforcement can also be provided only on the tip of the footwear or on the heel. The exemplary embodiment shows the particularly advantageous design of the heel reinforcement with a heel protection strip 5. This extends slightly above the sole and approximately parallel to it and runs from the heel on both sides to roughly the area below the two ankles, with the ends of the heel protection strip on both sides in pass over the shaft of the boot. Such a heel protection strip 5 offers good protection against damage for the upper edge 11 of the heel part of the sole 2 and, moreover, makes it easier to take off the boot. In the dipping process, the reinforcements 3, 4 are obtained in such a way that the molding 7 used for dipping is introduced into a dip vessel filled with hard polyvinyl chloride paste in two inclined positions in the course of two successive operations in such a way that the toe part of the molding 7 extends up to level 9 and then the heel of the molding 7 is up to level 10 in the dipping compound. Only then is the last already covered in the toe and heel area with a layer of dipping compound made of hard polyvinyl chloride in the usual way, in the horizontal position of the foot part, completely immersed in a soft polyvinyl chloride mixture, thus forming the entire boot shaft closed at the bottom, its connection with the sole takes place in a further operation. If the molding 7 is equipped with the rib-like protruding edge strip 8 in its heel part, the rib-like heel protection strip 5 protruding outwards in the homogeneous upper part 1 is retained in the dipping process without any additional work or material expenditure. In the boot described, the material used for the normal layer 6 has a proportion of 57 parts of polyvinyl chloride and 43 parts of various plasticizers and additives. The dip paste is therefore a soft polyvinyl chloride compound. For the pre-immersion process to obtain the reinforcements 3, 4 and the heel protection strip 5, a hard polyvinyl chloride paste is used which contains, for example, 72 parts of polyvinyl chloride, while the rest consists of plasticizer and supplementary ingredients. The compound used for reinforcement 3, 4 has a polyvinyl chloride content that is 15 to 25% higher and a significantly lower amount of plasticizer than the rest of the boot material. Godparents τ λ ν s i> r ü e. π ε -. 1. Boot or shoe made of polyvinyl chloride mixtures with reinforcements on the toe and or or heel part, characterized in that the toe and / or heel reinforcementeii (3, 4) a preferably 15 to 25% higher polyvinyl chloride content and one accordingly contain less plasticizer than the rest of the material used in the boot or shoe. 2. Boot or shoe according to claim 1, characterized in that the reinforced heel section (4, 6) with one above the sole (2, 11) and approximately parallel to this with one from the surface the reinforced heel-like rib-like heel protection strip protruding outward like a bead (5) is formed. 3. A method for producing boots or shoes according to claim 1 or 2 by dipping in Polyvinyl chloride mixtures, characterized in that to produce the reinforcements (3, 4) the moldings (7) used for diving in two successive operations with the Toe or heel section dipped in a hard polyvinyl chloride mixture in an inclined position and first then to form the entire shoe in a known manner in a normal soft polyvinyl chloride mixture is immersed. 4. Moldings for carrying out the procedure according to claim 3 for the production of boots or shoes according to claim 2, characterized in that that the molded strips (7) in the heel part has a rib-like protruding edge strip (8). Considered publications:
German Patent No. 607,267;
French patent specification No. 1004472,1011 891. 1 sheet of drawings © 909 5O7 / 202 4.59