DD237334A1 - ISOLATION - Google Patents

Abstract

The invention relates to a flächchenfoermiges structure, the heat insulation and insulation against sunlight, z. B. in construction and agriculture, can be used. According to the invention, the weft thread sections consist of crimped foliate edges with the formation of air entrapments in an R / R warp knit fabric consisting of synthetic material, in particular flat foil, in which weft thread sections are arranged close to one another transversely. The wrinkled Foliebaender can have a spiral-shaped structure with air pockets. You can also have a wrinkled inner part and a spiral outer part. The insulating mat has a low Wasseraufnahmevermoegen, but a high Wasserdurchlaessigkeit, so that even when exposed to moisture existing through the formation of large Lufteinschluesse Waermedaemmvermoeegen largely maintained.

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to a sheet-like structure for thermal insulation and insulation against sunlight in many areas, eg. B. in construction and agriculture, can be used.

Characteristic of the known technical solutions

It is known to use mats made of glass fleece or mineral wool for sound and heat insulation (eg DE-OS 2719 411).

For similar purposes, numerous other nonwovens and composites are used. A major disadvantage of these products is that they have a large water absorption capacity, whereby their insulation function is severely impaired when exposed to moisture.

Furthermore, reed or straw mats are used for frost protection purposes and for shading, but they have only a limited insulation effect and a short life.

Coated tarpaulins, z. B. are used for covering concrete surfaces have due to their compact structure only a small insulating effect. In addition, a moistening of the concrete is hindered.

Object of the invention

The aim of the invention is to develop a cost-producible insulating mat with a long service life, which has a good water permeability and largely retains its insulating effect even when exposed to moisture.

Essence of the invention

The technical object of the invention is to provide a stable in use structure for an insulating mat containing water-permeable areas and voluminous areas with large air pockets.

According to the invention, this object is achieved in that in a warp knit of synthetic material weft thread sections of folded foil strips of at least 100mm width and at most 200 / zm thickness are tightly lined up predominantly transversely integrated.

Suitably, the weft thread sections can be continuous transverse shots.

The crumpled film strips may have a slight twist. Furthermore, the film edges may have a crimped inner part and a spiral outer part.

The crumpled film strips can additionally be wrapped with a narrower film strip, which can also be glued or welded.

The stitch-forming threads of the warp knitted fabric can be made of stiff material.

In the context of the invention, it is also possible that the weft thread sections are incorporated in a right / right warp knit and the distance between the two fabric sides is at least 10mm to each other.

The weft sections can also be incorporated into a sewing knit, wherein the distance of the wales is at least 25 mm.

The close juxtaposition of crumpled foil strips causes due to the voluminous nature to form large air pockets a high insulation effect. Advantageously, the crumpled foil strips are integrated as continuous cross-shots. In this way, an increased surface stability of the insulating mat is achieved. Additional air pockets occur when the film edges are slightly rotated by overhead removal of standing bobbins. By this type of withdrawal, a structure of the film strips is also produced, which is characterized by a chopped inner part and a spiral outer part. This structure causes the film edges can absorb only a little water, whereby the high thermal insulation capacity is largely maintained even when exposed to moisture. Such an effect can also be achieved if the crumpled film tapes are enveloped by a narrower film strip. The absorption of water is completely prevented if the film strips are additionally glued or welded.

In contrast to the low water absorption capacity, the water permeability of the insulating mat is very high, since the water can flow between the individual film strips.

The use of stiff synthetic material for the stitch-forming threads of the warp knitted fabric has the advantage that the structure of the insulating mat obtains a high stability. Thus, a compression and thus the reduction of important for the insulation air pockets is largely prevented. If larger compressive loads have to be absorbed, synthetic wire can also be used for the stitch-forming threads.

Since all components of the insulating mat made of rot-proof synthetic material, it has a long life.

It is particularly advantageous for the achievement of a large volume of derteoliermatte when the film edges in a right / right warp knitted fabric whose fabric sides have a distance of at least 10mni to each other, are involved.

However, a good thermal insulation effect is also achieved by integrating the film strips in a highly productive producible Nähgewirke. In order to obtain a sufficient amount of air bubbles, the distance between the wales must

at least 25mm. .

embodiment

The invention will be explained in more detail below with reference to embodiments. In the accompanying drawings show:

1: a part of an insulating mat, wherein the film strips are integrated in a right / right warp knitted fabric Fig. 2: a simplified representation of the section AA of Figure X ₁ illustrating the Foiiebänder Fig. 3: another embodiment of the Foiiebänder, also as section AA from FIG. 1 FIG. 4: a part of an insulating mat, wherein the film strips are integrated into a sewing knit

Example 1: , '

in a right / right warp knit extremely coarse structure that can be produced on a Raschel machine with appropriately sized knitting tools, as a weft thread sections 1 continuous transverse shots of film strips are involved (Fig. 1). The film strips have a width of 300 mm and a thickness of 1ΟΟμιτι.

The z. B. by means of a special nozzle creased film strips 2 are wrapped with 80 mm wide and 25μΐη thick F.OLiestreifen 3, which are fed through funnel-shaped means wrapped (Fig. 2).

The stitch-forming threads of the right / right warp knit consist of synthetic wire of about 2 mm in diameter, the distance between the two fabric sides to each other is 30 mm.

Such an insulating mat has an excellent thermal insulation effect due to its voluminous nature. It retains this structure largely under pressure, is hardly compressed.

This insulating mat is thus z. B. applicable as a thermal barrier coating in prefabricated components.

Example 2:

On a modified stitchbonding machine, a mat is produced in 1,600 mm working width. The weft sections 1 of film strips with 130mm width and 25 / mm thickness are integrated as a continuous transverse shot (Figure 4). The foil strips are lined up tightly, slightly overlapped, tied off at a distance of 50 mm by the wales 4.

The stitch forming threads of the sewing knit consist of PA-S 94 tex.

By overhead deduction of slide-Teilbobinen receive the foil strips a slight turn. The structure produced thereby has a crimped inner part and a spiral outer part (FIG. 3).

This mat can z. B. be used to cover fresh concrete. If necessary, water can be sprayed on, which passes without difficulty between the film strips through the mat.

Another application possibility is the use of the mat to cover cold frames.

Claims (9)

Invention claim: 1. Insulating mat in the form of a warp knitted fabric made of synthetic material, characterized in that weft thread sections (1) of knitted foil strips of at least 100mm width and at most 200μιη thick thickness strung together predominantly transversely in the warp knitted fabric are integrated. 2. Insulating mat according to item 1, characterized in that the weft thread sections (1) are continuous transverse shots. 3. Insulating mat according to item 1, characterized in that the crumpled foil strips have a slight rotation. 4. Insulating mat according to item 1, characterized in that the Foiiebänder have a crimped inner part and a spiral outer part. 5. Insulating mat according to item 1, characterized in that the crumpled film strips (2) are covered with a narrower film strip (3). 6. insulating mat according to item 1 and 5, characterized in that the enveloping film strip (3) is glued or welded. 7. insulating mat according to item 1, characterized in that the stitch-forming threads of the warp knitted fabric made of rigid material. 8. insulating mat according to item 1, characterized in that the weft thread sections are integrated into a right / right warp knitted fabric and the distance between the two fabric sides to each other is at least 10mm. 9. Insulating mat according to item 1, characterized in that the weft thread sections are incorporated into a knitted fabric, wherein the distance of the wales (4) is at least 25 mm.