JPS62501918A - Elastic stretching mat for leather stretching equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Elastic stretching mat for leather stretching equipment This IJI relates to adhesive stretching mats for leather and part-time stretching devices. - The mat is in the shape of an endless mat droop and is suitable for vulcanization (hot vulcanization or cold vulcanization). At least two rubber layers that are separated from each other are removed.

A continuously operating stretching device using this type of stretching mat has been described in the previously published application WO It is disclosed in No. 35703309. Skin that is about to be stretched / 6 stretched mat When compressed between areas, this skin IYC has a strong ability to stretch the stretch mat within that area. resist. As a result, outside the area mentioned above, ie, in the peripheral area of the mat, Stretchable mats can stretch considerably, and there is a risk that the edges of the mats may break off.

The first objective of this IJ is to use a stretchable mat that eliminates the risk of the edge of the mat avoiding It is to provide. In order to achieve this goal, this IJ stretching mat is By placing crimped or wavy fibers between the rubber layers, the above stretch mat Even if the fiber layer stretches to a certain extent, it should not be stretched any further, and the above fiber layer should be In addition to the length of the mat, the length of the mat is covered with straight fibers or filaments. 4. Preventing the cut from stretching along its length. It will be charged as ¥.

The #a string that restricts the elongation of the pine 1~ It is constructed to form a net in which the direction of the fibers is distributed so as to limit the elongation of the fibers. can be achieved. In order to achieve the object of this invention, a fiber with limited elongation is required. The fibrous layers do not necessarily need to extend across the entire width of the mat. because, The role of this fiber is to protect the area covered by the leather that is about to stretch. The area that is not YQ will stretch disproportionately to the stretch of the area. This is because it is to prevent things from happening. However, if you do this, the skin-death arrangement How and the size of the minimum hide that can be stretched by this device is limited Put it away. Therefore, in the best embodiment of the present invention, the above fiber layer is Distracted over the area.

In the optimum case, the elongation li) allowed by the fiber layer is the maximum of the leather in question. Effectively equivalent to a large stretch.

The fiber layer is a single or multi-threaded curly filament (single fiber). Alternatively, it can be manufactured using crepe filament. For example, create a wave A net knitted from girder polyamide threads can be considered. However, the fiber used Any synthetic or natural fiber with high tensile strength can be used. It's easy.

This applies to continuously operating decompression devices such as those disclosed in WO 35/3309. When using a stretchable mat.

In addition to fibers that allow the mat to stretch a limited amount, of the mat in the longitudinal direction of the mat, i.e. in the direction of the endless loops of the mat. A straight fiber or filament that stops elongation and extends in the longitudinal direction. A standard must be established.

The invention will be further described with reference to the attached side 1g.

Is this 3 in Figure 1? ! Along the 1-■ line of the fjSz diagram of a part of the IJ stretch mat FIG. 3 is a diagram showing a cross section.

The 'fsZ diagram shows the cross section of the -1- side rubber layer l, and the lines are omitted for clarity. FIG. 4 is a cross-sectional view of a corresponding mat portion.

In this example, a section of endless pine lube is shown, and the length of the endless loop is The horizontal direction is indicated by arrow A. One eye above the center of this Matsudoroop in the length direction It is indicated by a dashed dotted line B. This mat consists of two mats bonded together by vulcanization. Consists of rubber layers 1 and 2. Vulcanization is done by cold vulcanization or hot vulcanization using adhesives. I can do it. Between the rubber layers 1 and 2, crimped fibers, waved mm[ , or a layer 3 consisting of rolled m-fibers is arranged, and this layer 3 It is characterized by the fact that once it has been stretched by a certain amount, it will not be stretched any further.

This fiber layer 3 is made into a network so that the rubber layers 1 and 2 are firmly connected through the network 11. It is desirable, however, that the fiber or filament such as curling, waving, or zigzag patterns. As a result, before starting to limit the elongation of the fibers or rubber mat forming the mesh 11 , the length becomes longer. The elongation of this m-fiber is equal to the maximum elongation of skin-1. It is desirable to choose carefully. A suitable material for the II fiber Mt of the net is, for example, It is a wavy polyamide filament. All with sufficient tensile strength It is clear that natural or synthetic fibers can be used as the fibers of the net. be.

Select the direction of the filament in the net 3 to be diagonal as shown in Figure 1. , the elongation of the mat and the elongation 1) + limit function are (II It will be done. In addition to this, the principles set out in WO 85/3309) Therefore, in order to operate such a continuous motion device, the length of the mat loop of the device must be Stretching in the horizontal direction (in the direction of the arrow) must be completely prevented. For this reason, on the other hand There is a rubber layer in the rubber layer l to prevent the mat from stretching in the length direction (direction of arrow A). one or more layers of longitudinally straight fibers or filaments 4 or +fQ I'm being kicked. The plurality of filament layers 4 are formed by vulcanizing the rubber layer l and the plurality of rubber layers. It is also possible to arrange it within this rubber layer 1 by bonding it together.

international search report 1o1. ,+,,1゜,,,Ap,□,. +,,-++-,PCT/FI861 000161mem・+1mm1＾p -＾-・PCT/FI8610001 6

Claims (1)

[Claims] (1) It forms an endless loop and is mutually bonded by vulcanization (hot vulcanization or cold vulcanization). An elastic stretch mat having at least two rubber layers (1, 2) bonded together, After this mat has stretched to a certain extent, the rubber is applied to prevent it from stretching in the width direction. Curly or wavy fibers (3) are placed between the mat layers, and in addition fibers or filaments that are straight in length to prevent longitudinal elongation An elastic stretching mat for a leather stretching device, characterized in that it is provided with (4). (2) a layer (3) of said fibers that allows limited elongation of said mat; Stretching according to claim 1, characterized in that it extends over a region. mat. (3) The elongation allowed by the fiber layer (3) is substantially equal to the maximum elongation of the leather. Stretchable mat according to claim (2). (4) The fibers should be adjusted so that the elongation limiting function described above can be obtained in all directions on the mat surface. The wavy fibers are distributed in the same direction to form a network. Stretchable mat according to claim 1, 2, or 3. (5) The fiber layer (3) that allows limited elongation is so as to cover at least a portion of the edge of the stretch mat located on the outer side of the mat; Claim (1), characterized in that it is provided at the edge of the stretchable mat. Or the stretchable mat described in item (4). (6) The fiber layer (3) is made of curled or wavy single or double yarn. Claims (1), (2), characterized in that they are made of filament; Stretchable mat according to item (3), item (4) or item (5).