Processing and safety instructions*
Our textiles are produced following the known and designated fields of application. Due to several processing steps during production deviation of product attributes such as width, grammage, shrinkage, color and ink acceptance as well as other technological attributes might occur. Identical product charges will show these deviations in a very tight range of tolerance. From production to production appreciable differences might happen. Hence it is recommended to produce same production charge. When use materials from different productions previously of production a processing test should be carried out.
Small faults, i.e. spots, knit or weave faults, cannot be avoided during textile production and must be accepted. Faults are identified in the final fabric and must be considered during further processing or fabrication. Therefore, it is recommended to produce same production charge. The color “rohweiß” determines that during finishing of the fabric no dyestuffs and optical brightener has been applied. It determines the color of yarns used during production of the textile which may vary depending on the provenience. Hereupon the finisher has no influence.
Depending on the type of fiber and textile construction shrink value varies. Every thermal treatment of synthetic material and/or wet treatment of cellulosic textiles with applied heat in a free from tension status will inevitably lead to a change of the length and width of the fabric which are noticed as a deviation of the original appointed square measures, grammage and shrink values. These attributes are in general identified as residual shrinkage in the textile industry and must be considered during further processing or fabrication and do not fall under any warranty of the textile manufacturer. At the end of production our fabrics set out low shrink values which are stated in the technical data sheet accordingly.
The influence of the moisture content of the goods and the room air is of particular importance in color printing of the goods intended for this purpose. An uneven moisture content can adversely affect the print quality.
It is therefore advisable to acclimatize goods wrapped in foil for approx. 24 hours before printing. The products intended for printing are designed for certain printing processes by their properties. For optimum print, product information should be considered. Regardless, printing results and color fastness are affected by various parameters that only the operator can influence.
For example, a superposition of fabric raster and print raster in the worst case can lead to a moiré effect. Also, the printing machine equipment technology, the inks, the color depth and saturation, the humidity of textile and air during printing, the drying time and the contact time at sublimation prints and the residual moisture content of the printed goods, the fixing temperature and time and other parameters of different influence on the print result and the properties of the printed textile. This is the responsibility of the operator especially for new combinations and colorits. It is therefore advisable to carry out your own examinations and tests in advance.
With polyamide products and also with optically brightened goods, nitrogen oxides (NOx) of the room air can lead to discoloration and yellowing. If such damage occurs, for example, in a processing and storage area in the vicinity of busy roads, the system for air conditioning of the room should have a special filter. The transport vehicles should be electrically operated in these cases.
For certain applications, textiles with flame retardant properties are required. Textiles made of 100% polyester can obtain these properties either through the use of flame-retardant yarns or through a flame-retardant finish. Appropriate certificates and test certificates are available for these textiles or can be produced on request. Non-permanent flame retardants can be used in the further processing of textiles, in particular if a wet treatment at a higher temperature (after-wash of printing, saturated steam treatment) or a thermal treatment at a temperature higher than 120 ° C (fixation of printing, lamination, calandering, thermal after-treatment) their effect be restricted. The impact of these treatments on the flame retardant properties of the products we supply is unpredictable due to the variety of procedures and the process conditions used and requires special testing. If necessary, a subsequent improvement of the flame retardant must be provided.
In thermal processes with a temperature higher than 180 ° C (e.g. calander, fixation of polyester prints with disperse dyes), it can lead to evaporation of gaseous and fine particulate substances. It is therefore recommended to extract the exhaust air and discharge it into the atmosphere. Here, a heat recovery and possibly also an exhaust filter should be used. This is particularly important when a process temperature greater than 200 ° C is required. Incidentally, at these temperatures, there may also be a structural change in the material. The deposited substances on the surface of the calander or calander felt should be removed by regular cleaning to prevent transmission to the textile and thus its loss of quality. In this context, attention should be paid to the information in the safety data sheets provided by the suppliers of the dyes, inks and chemical aids used for printing.
During storage and also during transport, it must be ensured that suitable shelves are available, rolled goods are placed on flat surfaces that do not allow the ends or edge areas to overhang, and rolls or tableware stored in sturdy cardboard boxes are not stored one above the other and generally damage caused by storage frame or storage parts, such as bruises or sharp edges caused by tearing and cuts, and caused by improper transport overstretching, compression and contamination are avoided.
Recommended storage and transport conditions are: Storage temperature:
|Storage temperature:||Ø 20 °C||min.: 18 °C||max.: 30 °C|
|Rel. Humidity:||Ø 60%||min.: 40%||max.: 70%|
If these conditions are under or exceeded, damage to the goods, the finishing, the coloring, and the printing may occur.
In extreme transport and storage conditions, for example in a long-haul sea transport and in extreme climatic conditions (e.g. high temperature and high humidity), especially in medium and dark shade prints or dye of polyester fabrics in particular can lead to thermal-migration of the dyes, which is expressed for example in a deterioration of rubbing fastness. This phenomenon is independent of the quality of the final product and should be investigated by sample dyeing / printing and conditional testing prior to production by the operator. We are happy to provide further advice and support from our quality laboratory.
Outdoor products are intended for outdoor use. However, different weather and environmental influences can significantly affect the durability, which is why no guarantee can be given. It can gladly be given experience reports on special conditions.
Subsequent cuts in the width of the goods, which are made at the request of the customer, can lead to wavy edges and differences in the finished product width of up to 1.5 cm. This should be taken into account when dimensioning the goods for printing and fabricating. Subsequent cut goods are excluded from a complaint.
* The following processing instructions are based on our many years of experience and are recommended for consideration. Legally binding assurances cannot be derived from this information.