VINNAPAS® eco EN 1020
VINNAPAS® eco EN 1020 is a self-crosslinking, aqueous polymer dispersion based on the monomers vinyl acetate and ethylene. VINNAPAS® eco EN 1020 is produced without the use of plasticizer. VINNAPAS® eco EN 1020 is a fossil resources saving product. With the purchase of this product, 100% of the fossil-based raw materials required for manufacturing of this product are replaced by sustainably certified biomass. The Substitution is based on the REDcert² biomass balance approach audited by TÜV Nord.
• VINNAPAS® eco EN 1020 is particularly suitable as binder for soft hydrophilic nonwovens. The binder can be applied by spray, impregnation or foam
• VINNAPAS® eco EN 1020 provides good wet strength while the free formaldehyde content on the nonwoven remains low.
VINNAPAS® eco EN 1020 can be mixed with most of the VINNAPAS® dispersions and with many other aqueous polymer dispersions. However, the compatibility of the mixture should be tested by undertaking a storage test. Temperatures above 150 °C are necessary to achieve proper crosslinking.
Suitable defoaming agents include 1) SILFOAM® SE1662, 2) FOAMASTER® WO 2310, 3) Agitan® 352 and 4) SURFYNOL® DF58. Their compatibility and efficiency in the formulation chosen should always be tested.
1) SILFOAM® is a trademark of Wacker Chemie AG
2) FOAMASTER® is a trademark of BASF SE
3) AGITAN® is a trademark of MÜNZING Chemie GmbH
4) SURFNOL® is a trademark of Evonik Resource Efficiency GmbH
Werecommend, in particular, products with a neutral pH, e.g. those based on cellulose derivatives, polyvinyl alcohol or polyurethane, like e.g. 5) ACRYSOLTM RM8-W. Should alcali-swellable polyacrylic acid derivatives be used those need to be chosen that are effective with ammonia, in order not to interfere with the acid catalyzed cross-linking of VINNAPAS® eco EN 1020.
Typical alkali-swellable thickening agents are, for example, 5) ACRYSOLTM ASE60, 6) ROHAGIT® SD15, 7) RHEOLATE® 420 or 425 8) RHEOVIS® AS1130. The efficacy and compatibility of the formulation chosen should always be checked.
5) ACRYSOLTM is a trademark of Dow Chemical Company
6) ROHAGIT® is a trademark of Synthomer PLC
7) RHEOLATE® is a trademark of Elementis Specialties, Inc
8) RHEOVIS® is a trademark of BASF SE
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Wacker Chemie AG
When the dispersion is stored in tanks, proper storage conditions must be maintained. The product has a shelf life of 6 months starting from the date of receipt if stored in the original, unopened containers at temperatures between 5 and 30 °C. Any longer periods for the maximum storage period that may be described in the Certificate of Analysis which accompanies each shipment of the product, take preference over this suggestion in which case the time period stated in the Certificate of Analysis shall be solely authoritative. Iron or galvanized iron containers and equipment are not recommended. Corrosion could result in discoloration of the dispersion or blends made from it in further processing. We therefore recommend the use of containers and equipment made of ceramic, rubberized or enameled materials, appropriately finished stainless steel, or plastic (rigid PVC, polyethylene or polyester resin). As polymer dispersions may tend to superficial film formation, skins or lumps may be formed during storage or transportation. A filtration process is thus recommended prior to utilization of the product.
Preservation for Transport, Storage and further Processing
The product is adequately preserved during transportation and storage if kept in the original, unopened containers. However, if it is transferred to storage tanks, the dispersion should be protected against microbial attack by adding a suitable preservative package.
Measures should also be taken to ensure cleanliness of the tanks and pipes. In unstirred tanks, a layer of preservative-containing water should be sprayed onto the surface of the dispersion to prevent the formation of unwanted skin and possible attack by microorganisms. The thickness of this water layer should be < 5 mm for low viscosity dispersions and up to 10–20 mm for high viscosity products. Proper procedures – periodic tank cleaning and sanitization – must be set up in order to prevent microbial attack. Contact your biocide representative/supplier for further plant hygiene recommendations. Measures should be taken to ensure that only clean air enters the tank when the dispersion is removed.
Finished products manufactured from polymer dispersions usually also require preservation. The type and scope of preservation will depend on the raw materials used and the anticipated sources of contamination. The compatibility with other components and the efficacy of the preservative should always be tested in the respective formulation. Preservative manufacturers will be able to advise you about the type and dosage of preservative required.