application information :lqgrzsur¿ohzudsslqj · nin he reive oponens in he prier el - erate the...

Jowatherm-Reaktant® 604.25Jowatherm-Reaktant® 604.20Jowat® 406.78/89Jowat® 406.84

PUR hot melt for exterior applications Certified adhesive-primer systems for PVC profiles VOC-reduced primers specific products for PVC window profiles

Window profile wrapping

Application Information










PUR hot melt adhesive provides optimum adhesion on PVC and aluminium profiles for windows and doors. In addition, overlapping bonding is now for the first time possible on the acrylate surface layer of the window foil. Due to a significantly reduced open time, the speed of the laminating process can be increased without affecting the process stability.

Jowatherm-Reaktant® 604.25- suitable for PVC and aluminium profiles (with a proper surface treatment)- overlapping bonding on acrylate layer possible- increased resistance due to improved thermal stability- faster processing due to short open time and high initial strength- low processing temperatures (≥ 120 ºC)- high hydrolysis resistance- downline processing after 24 h in combination with Jowat® 406.84 The new high-performance adhesive combined with Jowat primers of the latest generation provide ex-

tremely stable processes and excellent processing characteristics. Only when the PUR adhesive comes into contact with the NEP-free primer during lami-nating, the reactive components in the primer accel-erate the crosslinking process, allowing a downline processing of the laminated window profiles already after 24 hours.

Through the new addition to the Jowat portfolio, processors have the opportunity to choose the most suitable adhesive depending on the individ-ual process requirements. The powerful adhesive system consisting of Jowat primers and adhesives represents the perfect product mix with regard to processing characteristics, process reliability, and process efficiency. By choosing the latest genera-tion of NEP-free, VOC-reduced primers from Jowat, processors additionally support a maximum of envi-ronmental protection and occupational safety.In combination with the new primer Jowat® 406.84, these adhesives do not only provide a very high initial strength, but also the advantage of using a VOC-reduced, NEP-free primer without hazardous material labelling. This is part of Jowat’s respon-sibility in the interest of sustainability in protecting employees and the environment. Apart from these aspects, the combination primer / adhesive also leads to convincing superior bonding results, and of course meets the requirement for peel strength of minimum 3 N/mm according to the new RAL-GZ 716. The standard grammages for the adhesive application usually run from 40 to 70 g/m². For the respective machines in use, the various process pa-rameters, as well as the profile and the type of foil, preliminary customer trials have to be run to define which adhesive/primer system is most suitable and tailored for the respective process.

Time in hours

0 4 8 12 16 20 24 28 32 36 40 44 48

604.15

604.20

604.25

604.17

Kleb

stof

f

Vernetzungsdauer bis es üblicherweise im Rollenschälversuch zum Folienriss kommt

Vernetzungsgeschwindigkeit

Zuna

hme

des

Adhä

sion

sspe

ktru

ms

Incr

ease

in th

e ad

hesi

on s

pect

rum

Time periods until foil tear is observed (90 degree peel test)

Adhesive

Adhesives for window profiles


Today, we expect a modern windows or entrance door to last around 25 to 40 years. Within this time, the windows and doors should operate without prob-lems and look good, which means that the laminated foil and the bonding system should not separate from the PVC or aluminium profile, even if the exposure stress due to climate conditions is extreme.

For lamination of window profiles, the PUR hot melt adhesives have proven for decades now to be high-ly suitable. Continuous further development of the foils used, the steadily increasing variety of materi-als and decors, and also the reduced storage time for the profiles after lamination – all of these factors represent more challenges for the adhesives. This is why today, we need adhesives that adhere to a multitude of different materials with fast crosslinking, which allows immediate downline processing of the laminated profiles.

The reactive hot melt 604.20 has been supplied by Jowat for several years. The extremely fast crosslink-ing of the adhesive facilitates short interim storage times before further downline processing steps.

Jowatherm-Reaktant® 604.20- fast crosslinking- can be applied at low temperatures (≥ 115 ºC)- downline processing after 6 – 8 hours

The new product Jowatherm-Reaktant® 604.25 represents a consequent improvement of this sys-tem, characterised by an improved adhesion spec-trum, shorter open time and higher initial strength.

The product ensures a reliable bond between foils with high restoring forces and the window profile, even on units with short pressing zones and press-ing times. The increased range of adhesion of this



PUR hot melt adhesive provides optimum adhesion on PVC and aluminium profiles for windows and doors. In addition, overlapping bonding is now for the first time possible on the acrylate surface layer of the window foil. Due to a significantly reduced open time, the speed of the laminating process can be increased without affecting the process stability.

Jowatherm-Reaktant® 604.25- suitable for PVC and aluminium profiles (with a proper surface treatment)- overlapping bonding on acrylate layer possible- increased resistance due to improved thermal stability- faster processing due to short open time and high initial strength- low processing temperatures (≥ 120 ºC)- high hydrolysis resistance- downline processing after 24 h in combination with Jowat® 406.84 The new high-performance adhesive combined with Jowat primers of the latest generation provide ex-

tremely stable processes and excellent processing characteristics. Only when the PUR adhesive comes into contact with the NEP-free primer during lami-nating, the reactive components in the primer accel-erate the crosslinking process, allowing a downline processing of the laminated window profiles already after 24 hours.

Through the new addition to the Jowat portfolio, processors have the opportunity to choose the most suitable adhesive depending on the individ-ual process requirements. The powerful adhesive system consisting of Jowat primers and adhesives represents the perfect product mix with regard to processing characteristics, process reliability, and process efficiency. By choosing the latest genera-tion of NEP-free, VOC-reduced primers from Jowat, processors additionally support a maximum of envi-ronmental protection and occupational safety.In combination with the new primer Jowat® 406.84, these adhesives do not only provide a very high initial strength, but also the advantage of using a VOC-reduced, NEP-free primer without hazardous material labelling. This is part of Jowat’s respon-sibility in the interest of sustainability in protecting employees and the environment. Apart from these aspects, the combination primer / adhesive also leads to convincing superior bonding results, and of course meets the requirement for peel strength of minimum 3 N/mm according to the new RAL-GZ 716. The standard grammages for the adhesive application usually run from 40 to 70 g/m². For the respective machines in use, the various process pa-rameters, as well as the profile and the type of foil, preliminary customer trials have to be run to define which adhesive/primer system is most suitable and tailored for the respective process.

Time in hours

0 4 8 12 16 20 24 28 32 36 40 44 48

604.15

604.20

604.25

604.17

Kleb

stof

f

Vernetzungsdauer bis es üblicherweise im Rollenschälversuch zum Folienriss kommt

Vernetzungsgeschwindigkeit

Zuna

hme

des

Adhä

sion

sspe

ktru

ms

Incr

ease

in th

e ad

hesi

on s

pect

rum

Time periods until foil tear is observed (90 degree peel test)

Adhesive



Jowatherm-Reaktant® 604.15 604.17 604.20 604.25Crosslinking speed medium medium very fast fast

Adhesion spectrum medium very wide wide very wide

Foils PVC / PMMA PVC / (PMMA) PVC / (PMMA) PVC / PMMA

Substrates PVC PVC / aluminium / galvanised sheet PVC / aluminium PVC / aluminium /

PMMAAgeing resistance satisfactory medium high high

For all standard melters in the market

yes yes yes yes

Density [g/cm³] approx. 1.10 approx. 1.12 approx. 1.12 approx. 1.12

Viscosity at 140 °C [mPas] approx. 45,000 approx. 42,000 approx. 40,000 approx. 25,000

Processing temperature [°C] approx. 130 - 150 approx. 130 - 150 approx. 120 - 140 approx. 120 - 140

Tested according to RAL-GZ 716/1 RAL-GZ 716/1 RAL-GZ 716 RAL-GZ 716

High flexibility

Basic"all-rounder"

Fastcrosslinking

Shortprozess

Amount of VOC content depending on the dosing quantity

1

2

3

4

5

6 7 8 9 10 11 12 13 14 15 16 17

Application by felt Application by Vakumat

Primer 1 with 65,0 % VOC Primer 2 with 51,0 % VOC Jowat® 406.84 with 29,5 % VOC

Established primers in the market generally have a VOC content of > 50 % and therefore Primer 2 with 51.0 % VOC have a more restricted grammage and application with regard to the limit of 5 g VOC/m² of laminated profile. The effect of the primer Jowat 406.84 with 29 % VOC is comparable with if not better than products with 50 % or more VOC. At the same time, it provides a wider process window while maintaining superior quality.

5,1

2,36

4,08

3,9

3,06

1,77

2,95

5,2 5,01

Maximum allowed VOC value of 5 g/m2 according to European VOC guideline 1999/13/ EG, Annex 2, Item 12

Primer application [g/m2]

VOC

con

tent

in g

/m2 p

rofil

e su

rfac

e

One-component, reactive polyurethane hot melt adhesives (PUR-HM) are characterised by an addition-al crosslinking reaction with moisture after the physical setting process through cooling and solidifica-tion. This crosslinking reaction, which may continue for several days, leads to a considerable increase in cohesion. In addition, the hot melt develops its elastomeric character due to the multidimensional crosslinking of the adhesive. Among other benefits, this type of adhesive therefore has a superior ther-mal and hydrolysis stability. The degree of chemical crosslinking depends on the ambient humidity. To prevent a premature reaction, PUR hot melt adhesives must be protected from humidity in manufac-turing, storage and processing. After complete chemical crosslinking, PUR hot melts cannot be molten again and provide superior resistance to water, solvents and cleaners.

INFO: PUR hot melt adhesives



Jowatherm-Reaktant® 604.15 604.17 604.20 604.25Crosslinking speed medium medium very fast fast

Adhesion spectrum medium very wide wide very wide

Foils PVC / PMMA PVC / (PMMA) PVC / (PMMA) PVC / PMMA

Substrates PVC PVC / aluminium / galvanised sheet PVC / aluminium PVC / aluminium /

PMMAAgeing resistance satisfactory medium high high

For all standard melters in the market

yes yes yes yes

Density [g/cm³] approx. 1.10 approx. 1.12 approx. 1.12 approx. 1.12

Viscosity at 140 °C [mPas] approx. 45,000 approx. 42,000 approx. 40,000 approx. 25,000

Processing temperature [°C] approx. 130 - 150 approx. 130 - 150 approx. 120 - 140 approx. 120 - 140

Tested according to RAL-GZ 716/1 RAL-GZ 716/1 RAL-GZ 716 RAL-GZ 716

High flexibility

Basic"all-rounder"

Fastcrosslinking

Shortprozess

Amount of VOC content depending on the dosing quantity

1

2

3

4

5

6 7 8 9 10 11 12 13 14 15 16 17

Application by felt Application by Vakumat

Primer 1 with 65,0 % VOC Primer 2 with 51,0 % VOC Jowat® 406.84 with 29,5 % VOC

Established primers in the market generally have a VOC content of > 50 % and therefore Primer 2 with 51.0 % VOC have a more restricted grammage and application with regard to the limit of 5 g VOC/m² of laminated profile. The effect of the primer Jowat 406.84 with 29 % VOC is comparable with if not better than products with 50 % or more VOC. At the same time, it provides a wider process window while maintaining superior quality.

5,1

2,36

4,08

3,9

3,06

1,77

2,95

5,2 5,01

Maximum allowed VOC value of 5 g/m2 according to European VOC guideline 1999/13/ EG, Annex 2, Item 12

Primer application [g/m2]

VOC

con

tent

in g

/m2 p

rofil

e su

rfac

e


Note: The products listed only represent a limited selection of the available product portfolio. Our service and consultation team from Sales and Product Marketing will be pleased to provide specific information, to select the product suitable for your process.


Guidelines for the use of solvent-based primers

The VOC installation directive as amended on 26.10.2015 regulates the national implementation of the European VOC directive 1999/13/EC on the limitation of emissions of volatile organic compounds due to the use of organic solvents in industrial manu-facturing facilities. The threshold for small installation is 5 tonnes per year for activities involving the bond-ing of wood or plastic for the manufacture of lami-nates (annex 1, point 12 of the VOC installation direc-tive and annex 2, point 12). If the emission threshold should be > 5 tonnes per year it has to be ensured that the VOC threshold is not higher than 5 g/m² of the laminated profile (item 2, annex 2, point 12 VOC installation directive). Once a year, the processor has to carry out a solvent management plan in which he calculates the consumption based on the amount of square metres of laminated profile. The maximum permitted limit is 5 g/m² of laminated profile. The con-sumption can be calculated based on the purchased quantities of solvents per year and the VOC content

indicated in the SDS under chapter 9.2. The VOC consumption per year is than divided by the total sur-face of laminated profiles (in m²). Should the thresh-old of 5 g/m² be exceeded, the processor has to in-form the authorities. These calculations have to be archived for a minimum period of 3 years and must be provided to the authorities upon request. Every 3 years, the emissions have to be measured by the authorities. Alternatively, the VOC emissions must be extracted and absorbed or thermally incinerated.The principle of substitution is anchored in the na-tional German directives on hazardous substances as well as in the European VOC directive 1999/13/EC. It states that all machine operators have the ob-ligation to reduce emissions and the health risk as much as possible, and to preferentially use products which have a lower VOC content and the least effect on human health and the environment, provided that they can be regarded as equivalent to products with a higher VOC content and more harmful ingredients.

Jowat® 406.78 (MEK) 406.84 406.89 (MCl)

VOC-reduced primer no yes no

VOC-share [%] 98 29 98

NEP-free yes yes yes

Hazard material labelling yes no yes

Application amount / felt [g/m²] 15 – 25 8 – 16 40 – 70

Application amount / Vakumat [g/m²] not suitable 8 – 16 not suitable

Solution effect on release agent very good very good very good

Solution effect on PVC very good good very good

Contains UV marker yes yes yes

Drying by IR radiator until a matt, dry surface is reached

by hot air blower against the profile direction until a dry, matt profile surface is

reached

by IR radiator until a matt, dry surface is reached

Quelle: Schüco International KG

In general, there are two types of primers. Classic solvent primers based on MEK or methylene chloride with a VOC content of approx. 98 %, and the so-called VOC-reduced primers (with a VOC content of 30 – 50 %) which are applied in considerably lower grammages.

The primer has two major purposes:1. Cleaning the profile surface by dissolving of usually non-polar foreign matter on the surface, resulting from the PVC formulation or developed during extrusion.2. Improving the physical adhesion on the profile surface by swelling/slight dissolving and / or by modifying the surface polarity to enhance adhesion.

INFO: Primer







Jowat® 406.78 (MEK) 406.84 406.89 (MCl)


VOC-share [%] 98 29 98










reached







Jowat® 406.78 (MEK) 406.84 406.89 (MCl)


VOC-share [%] 98 29 98










reached


Quelle: Schüco International KG

In general, there are two types of primers. Classic solvent primers based on MEK or methylene chloride with a VOC content of approx. 98 %, and the so-called VOC-reduced primers (with a VOC content of 30 – 50 %) which are applied in considerably lower grammages.

The primer has two major purposes:1. Cleaning the profile surface by dissolving of usually non-polar foreign matter on the surface, resulting from the PVC formulation or developed during extrusion.2. Improving the physical adhesion on the profile surface by swelling/slight dissolving and / or by modifying the surface polarity to enhance adhesion.

INFO: Primer


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The information given in this leaflet is based on test results from our laboratories as well as on experience gained in the field, and does in no way constitute any guarantee of properties. Due to the wide range of different applications, substrates, and processing methods beyond our control, no liability may be derived from these indications nor from the information provi-ded by our free technical advisory service. Before processing, please request the corresponding data sheet and observe the information in it! Customer trials under everyday conditions, testing for suitability at normal processing conditions, and appropriate fit-for-purpose testing are absolutely necessary. For the specifications as well as further information, please refer to the latest technical data sheets.

application information :lqgrzsur¿ohzudsslqj · nin he reive oponens in he prier el - erate the...

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