NZ757553A

NZ757553A - Sealing web

Info

Publication number: NZ757553A
Application number: NZ757553A
Authority: NZ
Inventors: Udo Simonis; Katarina Hevö
Original assignee: Icopal Danmark ApS
Priority date: 2017-05-15
Filing date: 2018-05-09
Publication date: 2021-07-30
Also published as: AU2018268965B2; CN110621491A; WO2018210667A1; RS64099B1; EP3625043B1; HUE061875T2; CN110621491B; PL3625043T3; SG11201909871VA; EP3625043A1; SI3625043T1; DE102017110497A1; ES2941959T3; HRP20230343T1; AU2018268965A1; PT3625043T; DE102017110497B4

Abstract

The invention relates to a multi-layer sealing web (10) for a region of a structure, said sealing web comprising: outer layers (14, 22, 24), which contain a base polymer and a plasticizer; and a combination carrier insert (16), which contains a glass nonwoven (20) and a glass reinforcement (18), the plasticizer being a low-molecular-weight plasticizer, the proportion of which in the outer layers (14, 22, 24) containing the base polymer being between 25 wt% and 40 wt%. The invention is based on developing a sealing web of a known type for cost-effective production, high dimensional stability and low shrinkage characteristics. Other advantages are discussed in the specification.

Description

Description Sealing Web The invention relates to a sealing web for a region of a structure, such as a roof, cladding, cellar or tank, the sealing web consists of outer layers which contain a base polymer such as polyvinyl chloride or a polyvinyl chloride copolymer, and a plasticiser, as well as a combination carrier insert which contains a glass nonwoven mat. As the glass rcement can consist of woven cloth, scrim, knitted cloth or combinations thereof, the combination carrier insert can ore also be referred to as a mesh-fleece-composite, fleece-composite, woven-fleece-composite.

A similar sealing web can be found under A1. To e ease of application, high impact th at low temperatures and high weather resistance, the plasticiser is to be a polymer plasticiser in the form of an adipic acid polyester with a mean molecular weight of 3,000 to 12,000. However, polymer plasticisers have considerable disadvantages in terms of application and cost.

The invention at hand is based on the task of further ping a sealing web of the type mentioned above in such a way that it can be produced cost-effectively, has high 2 (followed by page 2A) dimensional stability and low shrinkage characteristics. A problem-free mechanical attachment should be made possible.

A further aspect is that the sealing web should have an ely smooth or slightly ed surface.

Also, recycling should be better or easier compared to webs with polyester reinforcement.

In order to solve one or more of the abovementioned aspects, the invention essentially provides that the plasticiser is a low-molecular-weight ciser of which the proportion in the outer layers ning the base polymer is in each case between 25 wt.% and 45 wt.%, in particular, between wt.% and 37 wt.%, more preferably however, between 27 wt.% and 35 wt.%, respectively.

In particular, it is intended that the combination carrier insert contains at least one glass reinforcement from the group: glass cloth, glass scrim, glass mesh or any combination thereof.

A glass mesh or glass reinforcement can consist of woven cloth, scrim, knitted cloth or combinations thereof. Alternative terms for the named combination r insert can include mesh-fleece-composite, scrim-fleece-composite, woven-fleece-composite.

The difference between woven cloth and scrim is that woven cloth has a wavy fibre alignment and scrim has straight fibre alignment. Scrim can be single-layered or multi-layered. The fibres in scrim are not interwoven.

In a first aspect, the present invention provides a multi-layer sealing web for a region of a ure, such as a roof, cladding, cellar or tank, the sealing web features outer layers which contain a base polymer such as nyl chloride or a polyvinyl chloride copolymer, and a plasticiser, as well as a glass nonwoven mat and a combination carrier insert containing a glass reinforcement, the plasticiser is a lecular-weight plasticiser of which the tion in the outer layers containing the base polymer is between 25 wt.% and 40 wt.%, and in particular, the ation carrier insert has a binding agent based on at least one substance from the group styrene-butadiene, acrylate, PVC, EVA or a preferred combination thereof. 2A (followed by page 3) In a further aspect, the present invention provides a manufacturing process of the sealing web as described above in the first aspect of the invention, wherein the outer layers are ed by extrusion, aring, or by brushing, and then joined to the combination carrier insert.

In another aspect, the present invention es a manufacturing process of the sealing web as described above in the first aspect of the invention, wherein the layers which run along the side of the combination carrier insert facing away from the construction area, are produced by coextrusion or the calendering or brushing process, and the coextruded layers, the combination carrier insert and the layer which was produced by extrusion and runs along the side being ed to the construction area, are all joined to together by a single stack of calenders.

Thus, the invention proposes, in particular, a multi-layer sealing web for construction areas such as roofs, cladding, cellars or tanks, the sealing web has outer layers which contain a base polymer such as polyvinyl chloride or a polyvinyl chloride copolymer as well as a low-molecular-weight plasticiser, also a glass scrim, glass cloth or glass mesh consisting of a glass nonwoven mat as well as glass scrim with fibres running in lengthwise/longitudinal ion and crosswise/transverse direction in a sheet structure consisting of one or more layers of ht fibres aligned parallel.

The fibres are usually secured at the cross points - the securing takes place either by material closure or mechanically by frictional connection and/or form closure (positive locking).

The following types of fibre orientation are possible: ● monoaxial or unidirectional, resulting from the on of a set of parallel fibres.

● Biaxial, in which two sets of parallel fibres are fixed in the direction of two axes, multiaxial, in which l sets of parallel fibres are fixed in the direction of different axes.

The ion proposes a multi-layered sealing web. An inner layer is formed by the combination r insert. As this consists of a glass nonwoven mat and glass cloth, glass scrim or glass mesh, the result is a problem-free secure mechanical attachment. At the same time, sufficient dimensional stability is achieved. Shrinkage due to ageing is reduced in comparison to known roofing webs.

The invention also envisages that in particular, the glass reinforcement, such as the glass cloth, glass scrim or glass mesh, will be joined to the glass nonwoven mat using styrene-butadiene.

Starting with the outer , which should be based on PVC-P, SB binding agents are used, which deviates from expert’s common way of thinking. The interaction or ion of volatile or liquid components from the PVC-P based outer layer, e.g. plasticisers, ESO, etc., with the SB binder used in the combination carrier , can have a negative impact on the ties of the binding agent. Even if the use of styrene-butadiene means that the fibres of the glass reinforcement separate from the adjacent layers, the advantage is that higher wind suction forces are ed to loosen the sealing web, as the attachment of the sealing web does not act as a unit made up of many fibre strands, but instead as several fibres, which means that greater wind suction forces are required to loosen the sealing web.

It is possible to join the glass reinforcement, like the glass cloth, glass scrim or glass mesh with the glass nonwoven mat using acrylate or PVC-based variants such as PVC dispersions and PVC plastisols.

In contrast to existing sealing webs, a low-molecular-weight plasticiser, i.e. a monomer plasticiser, is used in the outer layers.

This s in high dimensional stability, low shrinkage and, in particular, the desired smooth outer structure. If there is only one outer layer running along the combination carrier insert, this means that, particularly on the side not being affixed, there is an intermediate layer creating the following order: outer-layer, ation carrier insert, intermediate layer, outer layer.

The composition of the intermediate layer is very similar to that of the outer . Differences may arise as a result of different ves, particularly with regards to UV stability and colour pigments, however, the intermediate layer may contain fewer ves than the adjacent outer layer.

It is able if the low-molecular-weight plasticiser is a phthalate-based plasticiser, in particular, a plasticiser from the group DPHP (Dipropyl heptyl phthalate) DINP (Diisonyl phthalate), DIDP (Diisodecyl phthalate). The plasticiser can also be a phthalate-free plasticiser, a ed plasticiser or a partially bio-based plasticiser as described in EP3156447.

A combination of the above plasticisers may also be an option in a further development of the invention.

A special characteristic of the invention is that each layer contains or ts of wt.%: low-molecular-weight plasticiser 25 - 45, in particular, 27 - 37 Processing additives such as lubricants 0 – 1.9, in particular, 0.1 – 1.50 Filler such as calcium carbonate 0 -20, in particular, 0 - 15 PVC 45 – 57, in ular, 46 - 56 Antioxidant 0 – 0.2, in particular, 0.1 – 0.2 UV stabiliser 0 – 0.23, in particular, 0.1 – 0.23 Other stabilisers 1.5 – 1.8 Colour pigments except TiO2 0 – 0.14, in particular, 0.005 – 0.10 Titanium dioxide 1.0 – 12, in particular, 1 – 8 Flame retardant additives 0 – 20, in particular, 0 – 12 Other stabilisers could include organic thermo-stabilisers. The use of such stabilisers has the advantage that ESO or ESBO (epoxidised soybean oil) is no longer required in the composition as a co-stabiliser.

The combination carrier insert is impregnated with the binding agent which ensures its connectivity to the nt outer-layers or rather outer and intermediate layers. It is preferable, that the binding agent is based on at least one substance from the group: styrene-butadiene, acrylate, EVA and PVC or combinations thereof. The PVC variant is particularly suitable as a dispersion or plastisol.

In particular, e-butadiene is recommended as a binding agent, which despite absorbing cisers, does not display any adverse effects on the g web, not even in the area of the nodes of the intersecting glass fibres. Also, the mineral properties make it easier to recycle compared to polyester.

The use of EVA, PVC, acrylate provides the advantage of exceptionally high ve th between the combination carrier insert and the adjacent layers.

Using the combination carrier insert as reinforcement has surprisingly ed in the sealing web having an extremely smooth surface.

In addition, by using the aforementioned combination carrier insert, tensile stresses were able to be eliminated in the end product. This leads to stable thickness tolerances of the individual layers, ng the manufacturer to e tighter thickness tolerances between the dual layers.

Exceptional high strength and easy attachment can be achieved when the glass nonwoven mat has a weight per unit area between 20 g/m² and 90 g/m² and/or the glass fibres of the glass nonwoven mat have a thickness between 10 µm and 20µm.

The strand spacing, mesh width or strand structure of the fibreglass cloth, fibreglass scrim or lass mesh should be between 2x2 and 6x6 or combinations thereof, although it would be preferable to select 3x3 - 4x4. 2x2 means that per cm, two glass strands are laid both in lengthwise and crosswise direction. Warp strand is the name given to fibres going in lengthwise direction and weft/fill strand for fibres going in the crosswise direction. The same goes for 3x3, 4x4, 5x5 and 6x6.

The structure or construction or strand spacing, or mesh width can be symmetrical, square, rectangular or asymmetrical. The following es are intended to illustrate the various structures: ● a square ure e.g. 2x2, i.e. 2 strands/cm in lengthwise and crosswise direction, 2 warp strands/cm and 2 weft strands/cm ● a rectangular structure would be for example 2x1, i.e. 1 /cm in lengthwise and 2 strands/cm in ise direction, which means 1 warp /cm and 2 weft strands/cm. ● an asymmetrical structure, for example, would be 2x2 ER (edge reinforcement), i.e. 2 strands/cm in both lengthwise and crosswise direction, whereby the edge area of the mesh in the crosswise direction has 4 instead of 2 strands/cm, which means 2 warp strands/cm and 2 weft strands/cm although in the edge area there would be 4 warp s instead of 2 warp strands/cm.

In addition, warp strands may be arranged double or in multiples, although the weft strands do not need to t the same amount.

Furthermore, different strand sizes can be used between the weft and warp strands, this includes using different diameters or different substance groups e.g. polyester and glass, however a least one of the two strands should be based on glass.

In yet another version, the glass nonwoven mat is placed in edge/margin areas or middle areas of the glass en width with reinforcing s – which are also based on glass strands or PES (polyester) strands i.e. mainly arranged in lengthwise direction of the sealing web. This type of design is preferable in areas of high wind, i.e. particularly in coastal areas where there is greater wind force or force transmission points entering into the sealing web.

The edge/margin area is fixed at 1 to 20 cm from the outer edge of the lengthwise direction of the membrane, whereby the preferred width is no more than approximately 6 cm. In on, between 4 and 20, preferably between 4 and10 reinforcing fibres can be arranged with a maximum spacing of 50 mm, however preferably between 5 to 10 mm apart. The spacing is chosen so that the ing plates, which are interspersed with screws or nails allow the membrane to be attached to the substrate or base.

At least 3 rcement fibres run along the substrate or base to ensure mechanical reinforcement.

Furthermore, it is intended that the fibre weight of the glass cloth or glass mesh is 30 tex to 80 tex, however, 50 to 80 tex is red.

The total weight per unit area of the combination carrier insert should be between 80 g/m² and 200 g/m², however, a weight of between 100 g/m² and 120 g/m² is preferred.

The sealing web itself should have a basis weight of between 1.4 kg/m² and 2.6 kg/m², however, the preferred weight is between 1.5 kg/m² and 1.9 kg/m².

The preferred thickness of the sealing web is between 1.0 mm and 2.5 mm, however of ular preference would be between 1.2 mm and 2.0 mm.

The sealing web invention is characterised among other things, however in particular by its tensile th [N/50 mm] in lengthwise direction where it es at least 1250, preferably at least 1000, but of particular preference would be 1150 to 1180 and/or in the crosswise direction at least 800, preferably a minimum of 1000, but of ular preference would be 1080 to 1110, according to EN 12311-2.

In on, the tear propagation strength [N] in the lengthwise direction shall be measured between 180 and 250 and in the crosswise direction between 210 and 300, according to EN 12310-2.

During manufacture, the sealing web is transported in lengthwise direction. Crosswise is the direction perpendicular to this.

To t the connecting points of the glass cloth, glass scrim or glass mesh from forming elevations on the edges of the sealing web, the invention stipulates that the glass nonwoven mat must run along the outside of the glass cloth, glass scrim or glass mesh which is not the attachment side of the construction area.

In the case of alternative roofing membrane products known to those in the industry containing mesh reinforcements or inserts, the ting points can come to the e of the roofing membrane causing a structural change. This is not the case with this invention as it contains a combination carrier insert consisting of glass fibres in the form of an unwoven mat as well as a glass mesh, or glass reinforcement made of cloth, scrim or a combination thereof or the glass unwoven mat of the combination carrier insert. However, the structural change in alternative roofing membranes can cause channels, sinkholes, or puddles allowing dirt, water, algae, insects, etc to accumulate. When these substances or organisms which have collected interact with the roofing membrane, or the components ned in the roofing membrane, e.g. the plasticiser, this can lead to accelerated ageing, especially around the areas where these oirs or channels have formed, which in turn results in a shorter lifespan of the roofing membrane.

This effect is avoided by the invention's use of the combination carrier insert made of glass fibres in the form of a nonwoven mat as well as a glass mesh or a glass reinforcement consisting of a cloth, scrim or combinations thereof, as this structural change in the e can no longer occur.

By using a combination r insert consisting of glass mesh or a glass reinforcement consisting of cloth, scrim or combinations thereof with a glass nonwoven mat, this s in improved fire resistance of the reinforcement or insert or the roof membrane or the complete roof structure, which can be trated in accordance with CEN/TS 1187:2012 "External fire exposure to g materials".

Another positive aspect is the improved sealing ties of the roofing membrane. This is due, in particular, to the smooth and wave-free nature of the roofing membrane. When welding with tic welding machines, this results in fewer imperfections, i.e. imperfections which have to be subsequently sealed by hand using hot air hand tools and the same materials as an additional workload. This enables better handling and faster laying time of the roofing membrane.

Furthermore, it is intended that the sealing web will contain one or more additives or additives from the group of s, pigments, colour additives, UV stabilisers, thermo-stabilisers, es, flame retardants.

Additives in the layers should differ in their tions according to the d effect. For e, in the outer layer or outer layers that run above the combination carrier insert when the roofing membrane is laid, the proportion of UV stabilisers and/or thermo-stabilisers and/or fungicides should be greater than in the layer or layers running underneath the combination carrier insert.

Preferably the intention is that one or two layers containing the base polymer and the monomer plasticiser run above the combination carrier insert and one layer below the combination carrier insert, i.e. on the building side, whereby the proportion of additives in the individual layers can vary as ned above.

In terms of processing, the innovative roofing membrane can be produced by (co-)extrusion using one or more stacks of calenders, the calendering process, or by brushing with plastisol. The combination carrier insert can be produced in a preceding step or can be added to the process as a separate glass nonwoven mat and glass mesh insert.

Further details, ages and characteristics of the invention result not only from the requirements, the teristics to be inferred from them, for themselves and/or in combination but also from the following description of preferred examples of use.

It shows: Fig. 1 A section of the g web Fig. 2 A stack of calenders – also known as a Calender, calender unit or roll calender machine for manufacturing the sealing web as per Fig. 1 Fig. 3 A section of cloth based on a single warp Fig. 4 A section of cloth based on a double warp Fig. 5 A section of a cloth-unwoven mat-composite Fig. 6 A section of cloth with a strand spacing or mesh width of 2x2 Fig. 1 shows a section of the innovative sealing web 10, which is used in the construction sector, e.g. for sealing roofs, cladding facades, lining tanks or lining cellars.

In the example, the g web 10 runs along a roof 12 and consists of a lower layer 14, which runs along the roof side i.e. on the construction area side. On the lower layer 14, there is a combination carrier insert 16 which in turn is made of a glass reinforcement 18 and runs along the roof side, having strands such as glass cloth, glass scrim or glass mesh or combinations thereof and consisting of a glass en mat 20.

In the following, the terms glass rcement, glass cloth, glass scrim, glass mesh are used, alone or in combination, but are intended to include any design.

Two layers 22, 24 are then ed on the combination carrier insert 16, which, like the lower layer 14, contain or consist of soft PVC (polyvinyl chloride) and a r plasticiser as well as one or more additives such as filling agents, pigments, UV stabilisers, thermo-stabilisers and biocides. The proportion by weight of the monomer softener in the respective layers 14, 22, 24 is n 25 wt.% and 40 wt.%, preferably between 25 wt.% and 37 wt.%, however in particular between 27 wt.% and 35 wt.%.

The use of a monomer plasticiser based on ate-based is preferred, in particular, a plasticiser from the DPHP group (Dipropyl heptyl phthalate), DINP (diisononyl phthalate), DIDP (diisodecyl phthalate). The plasticiser can also be a phthalate-free plasticiser, a biobased ciser or a partially bio-based plasticiser.

A special characteristic of the invention is that each layer 14, 22, 24 contains wt.%: low-molecular-weight plasticiser 25 - 45, in particular, 27 - 37 Processing additives 0 – 1.9, in particular, 0.1 – 1.50 Filling agents 0 - 20, in particular, 0 - 15 PVC 45 – 57, in particular, 46 - 56 Antioxidants 0 – 0.2, in ular, 0.1 – 0.2 UV stabiliser 0 – 0.23, in ular, 0.1 – 0.23 other stabilisers 1.5 – 1.8 Colour pigments except TiO2 0 – 0.14, in ular, 0.005 – 0.10 Titanium dioxide 1.0 – 12, in particular, 1 – 8 Flame retardant additives 0 – 20, in particular, 0 – 12 In particular, it is intended that the proportion of titanium dioxide in the upper layer 24 is greater than that in the middle layer 22. The titanium dioxide content of the lower layer 12 is in turn, less than that of the middle layer 22.

In addition, both the middle layer 22 and the lower layer 12, do not need to contain antioxidants and stabilisers this includes UV stabilisers.

The proportion of calcium carbonate in the lower layer 14 can be greater than in the middle layer 22, and the latter in turn can be greater in the upper layer 24.

The glass nonwoven mat 20 of the combination carrier insert 16 has a basis weight of between 30 g/m² and 90 g/m².

The glass fibres of the glass nonwoven mat or glass mesh or glass cloth, i.e. the glass reinforcement 18, should have a thickness of between 13 µm and 18 µm. The glass fibres of the glass cloth, glass scrim or glass mesh are characterised by a weight of 60 tex to 80 tex.

In addition, the strand spacing or mesh width or fibre construction of the glass cloth, glass scrim or glass mesh should be 3x3 to 4x4.

The surface weight of the sealing web 10 should be between 1.4 kg/m² and 2.6 kg/m², with a red thickness of 1.2 mm to 2.0 mm.

The layers 14, on the one hand, and 22, 24 on the other hand, will be attached to the combination carrier insert 16, in particular, by calendering, brushing or by ion.

In particular, it is intended that the layers 22, 24 will be coextruded and the layer 14 can be produced by extrusion with a single-channel nozzle.

The coextruded layers 22, 24 and the layer 14 are then attached to the combination carrier insert 16 which runs between them, using a single stack of calenders – also known as a calender unit or roll calender e. The various steps in this s are pictured with single stack of calenders.

The glass nonwoven mat 20 and the glass cloth, glass scrim or glass mesh 18 are nated with a binding agent, which consists of or contains at least one substance from the group styrenebutadiene , acrylate, PVC, EVA. This binding agent is then used to attach the combination carrier insert to the adjacent layers 14, 22.

Sealing webs produced in this manner, have a tensile strength in N/50 mm of the lengthwise direction of at least 800, ably of approximately 1150 to 1250 and in the crosswise ion of at least 800, but ably approximately 1080 to 1100, with the measurement being in accordance with EN 12311-2.

The maximum tensile elongation in the lengthwise and crosswise ion is approximately 2 - 5% also measured in accordance with EN 12311-2.

The tear resistance according to EN 12310-2 is approx. 220 N in the lengthwise direction and approx. 270 N in the crosswise direction.

The nail tear resistance according to EN 123010-1 is approx. 320 N in the lengthwise direction and approx. 375 N in the ise direction.

With regard to dimensional stability, according to EN 1107-2 the values were given in lengthwise direction -0.07% and crosswise direction -0.07%.

Fig. 2 shows a calender 100 although purely the principle behind it, with which the innovative sealing web can be ed using the extrusion or calendering process.

The calender is made up of a lower roller or drum 102, a middle roller or drum 104, and an upper roller or drum 106. In addition, two cooling rollers 108, 110 are shown in the example. rmore, the calender 100 has a co-extrusion nozzle 112 and a single l nozzle 114 which are each connected to a corresponding extruder.

To produce the roofing membrane 10, the combination carrier insert 16 is removed off a winder and guided through the rollers or drums 102, 104, 106. Following on from the lower and middle roller 102, 104 and prior to the ation carrier insert 16 being passed between the rollers 104 and 106, the middle layer 22 and outer layer 24 are applied via the extrusion nozzle. After passing between the lower and middle rollers 102, 104 heat is applied with an IR radiant heater 105. Then, on the opposite side of the combination carrier insert 16, the lower layer 14 is applied using an ion nozzle 114. The roofing membrane 10 is then passed between the middle roller 104 and the upper roller 106 before finally g around the cooling rollers 108 and 110.

By using the combination carrier insert 16, the two other already extruded layers - middle layer 22 and the outer layer 24 - are protected from very high heat input during the extrusion of the lower layer 114. This has a positive effect on the ageing of the middle layer 22 and the upper layer 24. This can be proven by the Yellowness Index.

Various atives for glass fibre orientation in the laying structure of the glass reinforcement are shown in Fig. 3 to 6.

Fig. 3 shows scrim with a single warp. The warp strands run above and below the weft strands, however, the upper and lower warp strands are offset from each other at a specified distance. At regular intervals, a warp strand below a weft/fill strand is followed by a warp strand above a weft strand. Two strands meet at the cross point.

Fig.4 shows a double warp in which the warp strands lie on top of each other, i.e. the upper and lower warp strands always lie on top of each other so that the weft strands run between the strands of the upper and lower warps. Thus, the three strands meet at the cross point.

Fig. 5 shows a section of the glass reinforcement in the form of scrim with a nonwoven mat. The scrim can, for example, have a single or double warp – however, in this example it is a single warp.

The scrim is then bonded to the glass nonwoven mat.

Fig. 6 shows single warp again like in Fig. 3. As in all the drawings, the warp s are marked with a K and the weft s are marked with an S. The length specification also indicates the strand spacing or mesh width.

The mesh width or strand spacing in the e in fig. 6 is 2x2, which means that 2 warp strands are used.

In particular, it is intended that the warp strands K run in the wise direction of the roofing membrane and the weft/fill strands K run perpendicular to the warp strands K. This results in the following advantages.

If, for example, on a building site off-cuts of the roofing membrane are required, which means pieces of membrane that do not correspond to the width produced, i.e. they need to be narrower, then the roofer needs to cut the membrane to the required size. y at least two points are ed to the membrane in order to ensure a straight edge.

Due to the innovative design of the warp strands, this task is simplified. Only a small cut at the cross margin corresponding to whichever width is required is necessary. ing this, the membrane can be torn to any desired length. Alternatively, a strip can be torn out of the middle n, in which case two cuts would have to be made.

"Tearing" is possible thanks to the warp strands running in the lengthwise direction of the roofing membrane. A straight edge is created which although frayed, does not pose any problems for the roofer as this is used as the lower seam when welding the joint. In other words, an original membrane sheet with a clean-cut edge covers the membrane sheet, which was manually torn to size on-site, thus the appearance is not negatively ed in any way. Also, this prevents a le capillarity of the reinforcement occurring as there are no exposed strands on the upper side of the roof. Therefore, the invention makes the roofer’s job easier. 1/61/6 22.24 14 n.--— '3‘53% 2% 5m L" {a :32: z»- Inf" 171m :5»- llé’ ‘ Fig. "’1‘ Fig. 2 Cooling Roller 1 1 14 Upper Roller Single Channel Einkanal Nozzle Dﬁse \2224 Cthrusion Middle Roller IR Nozzle Rad‘'a"t Heater 1 12 usion Dase / Lower Roller 1 00 Reinforcement EXTRA PAGE (RULE 26) EXTRA PAGE (RULE 26) EXTRA PAGE (RULE 26) EXTRA PAGE (RULE 26)

Claims

Patent claim Sealing Web

1. A multi-layer sealing web for a region of a structure, such as a roof, cladding, cellar or tank, the g web features outer layers which contain a base polymer such as polyvinyl chloride or a polyvinyl chloride copolymer, and a plasticiser, as well as a glass nonwoven mat and a combination r insert containing a glass reinforcement, the plasticiser is a low-molecularweight ciser of which the proportion in the outer layers containing the base polymer is between 25 wt.% and 40 wt.%, and in particular, the combination r insert has a binding agent based on at least one substance from the group styrene-butadiene, acrylate, PVC, EVA or a preferred combination thereof.

2. The sealing web according to Claim 1, wherein the combination carrier insert contains at least one glass reinforcement from the group: glass woven cloth, glass scrim, glass mesh or any combination of these.

3. The sealing web according to Claim 1 or 2, wherein the glass reinforcement is a flat structure with strands running lengthwise and crosswise in either one or more layers of parallel strands in ular stretched strands with the cross points of the lengthwise and crosswise strands preferably being fixed, the securing takes place in particular either by material closure or mechanically by frictional tion and/or form closure (positive locking).

4. The g web according to any one of the ing claims, wherein the tion of lecular-weight plasticiser is between 25 wt.% and 37 wt.%, in particular, between 27 wt.% and 35 wt.%.

5. The sealing web according to any one of the preceding claims, wherein the glass nonwoven mat has a basis weight between 30 g/m² and 90 g/m² and/or the glass fibres of the glass nonwoven mat have a thickness of between 13 µm and 18 µm.

6. The sealing web according to any one of the preceding claims, wherein the glass fibres of the fibreglass cloth, lass scrim or fibreglass mesh have a strand spacing or mesh width of 2x2 to 6x6, preferably, 3x3 to 4x4.

7. The sealing web according to any one of the preceding claims, wherein the low-molecular-weight plasticiser is a phthalate-based plasticiser, in particular, a plasticiser from the group DPHP (dipropyl heptyl phthalate) DINP (diisononyl phthalate), DIDP (diisodecyl phthalate) or a plasticiser which is phthalate-free, or at least partially bio-based.

8. The sealing web according to any one of the preceding claims, wherein the weight of the fibres of the glass cloth, glass scrim or glass mesh are 30 tex to 80 tex.

9. The sealing web according to any one of the preceding claims, wherein the g web has a basis weight of 1.4 kg/m² and 2.6 kg/m², in particular, between 1.5 kg/m² and 1.9 kg/m².

10. The g web according to any one of the preceding claims, wherein the thickness of the sealing web measures between 1.0 mm and 2.5 mm, in particular, between 1.2 mm and 2.0 mm.

11. The sealing web according to any one of the preceding claims, wherein the tensile th in N/50 mm in the lengthwise direction measures at least 800, preferably at least 1000, in ular 1150 to 1250, and/or in the crosswise direction at least 800, preferably 1080 to 1110.

12. The sealing web ing to any one of the preceding claims, wherein the sealing web has a tear ance in N in its lengthwise direction of between 180 and 250 and/or in the crosswise direction of between 210 and 300.

13. The sealing web according to any one of the preceding claims, wherein the glass nonwoven mat runs along the outer side of the glass cloth, glass scrim or glass mesh which is not the side being attached to the construction area.

14. The sealing web according to any one of the preceding claims, the sealing web contains one or more of the additives from the group: filling agents, pigments, colour additives, UV stabilisers, thermo-stabilisers, biocide.

15. The sealing web according to any one of the preceding claims, wherein the sealing web consists of a first outer layer which runs along the side to be attached to the uction area, a combination carrier insert, as well as at least one outer layer which runs along the side of the combination carrier insert which is not being attached to the construction area.

16. The sealing web according to any one of the preceding claims, wherein the side of the combination r insert which is not being attached to the construction area has two layers, one middle layer and an outer layer.

17. The g web according to any one of the ing claims, wherein in particular, each layer contains or consists of wt.%: lecular-weight plasticiser 25 - 45, in particular, 27 - 37 Processing additives like lubricants 0 – 1.9, in particular, 0.1 – 1.50 Filling agents like calcium carbonate 0 -20, in particular, 0 - 15 PVC 45 – 57, in particular, 46 - 56 Antioxidant 0 – 0.2, in particular, 0.1 – 0.2 UV stabiliser 0 – 0.23, in particular, 0.1 – 0.23 other stabilisers 1.5 – 1.8 Colour pigments except TiO2 0 – 0.14, in particular, 0.005 – 0.10 Titanium dioxide 1.0 – 12, in particular, 1 – 8 Flame retardant additives 0 – 20, in particular, 0 – 12

18. The sealing web according to any one of the preceding claims, wherein the glass reinforcement has intersecting warp and weft strands.

19. The sealing web according to any one of the preceding , wherein the glass reinforcement has a single or double warp structure.

20. The manufacturing s of the sealing web according to any one of the preceding claims, wherein the outer layers are produced by extrusion, calendaring, or by brushing, and then joined to the combination carrier insert.

21. The manufacturing process of the sealing web according to any one of the Claims 1 to 19, wherein the layers which run along the side of the combination carrier insert facing away from the construction area, are produced by coextrusion or the calendering or brushing process, and the uded layers, the combination carrier insert and the layer which was produced by extrusion and runs along the side being attached to the construction area, are all joined to together by a single stack of calenders.

22. A sealing web according to claim 1, substantially as herein described or ified with reference to the accompanying drawings.

23. A manufacturing process ing to claim 20, substantially as herein described or exemplified with reference to the accompanying drawings.

24. A manufacturing process according to claim 21, substantially as herein described or exemplified with reference to the anying drawings.