FAQ
General questions
HOW LONG ARE THE DELIVERY TIMES IN THE ONLINE SHOP?
As a rule, your order leaves our production facility in maximum 7 working days. In the case of an increased number of orders, deviations in delivery times may occur. In that case each customer will be informed in front.
As soon as your order is on its way to you, you will receive a shipping confirmation and you will be able to track the whereabouts of your order using the tracking number.
IS THERE A DISCOUNT FOR LARGER ORDER VOLUMES?
We have the following sales rules:
IF ONLINE SHOPPING:
MOQ is 200 Euro + shipping EU cost 200 Euro
Order more than 3500 Euro shipping is for free
Order more than 5000 Euro shipping is for free and 5% discount
Order more than 10000 Euro shipping is for free and 8% discount
Lead time 5 working days
THROUGH EMAIL REQUEST
MOQ is 500 Euro + shipping EU cost 200 Euro
Order more than 3500 Euro shipping is for free
Order more than 5000 Euro shipping is for free and 4% discount
Order more than 10000 Euro shipping is for free and 7% discount
Lead time 5 working days
WHAT ARE EXACTLY THE SHIPPING COSTS?
Shipping within Poland costs 150 Euro. If the purchase amount is at least 3500 Euro, shipping is free
Shipping to EU countries costs 200 euros, while to non-EU countries the fee is 300 Euros. If the purchase amount is at least 3500 Euro, shipping is free.
HOW CAN I FILE A CLAIM FOR DAMAGED, MISSING OR INCORRECT GOODS?
Complaints regarding an order in the online store should be sent by e-mail (sales@chem-craft.com). Please note if any defect is caused by the courier service or by poor workmanship (manufacturing defect) then you have 5 working days to report the defect.
In the message, please include the relevant order number and a list of affected products with a detailed description. In the case of damaged goods, please send us photos that clearly show the damage to the products. For more information click here.
HOW CAN I RETURN ORDED ITEMS?
The cost of transport for returns within 14 days of the warranty is not covered by the seller. However, if a faulty or damaged product has been delivered and our customer service will positively consider the shortcoming on our part, the cost of the return shipment will be arranged by us.
HOW CAN I FIND OUT WHEN MY ONLINE ORDER WILL SHIPPED AND WHERE IS THE PACKAGE?
As soon as your order is packed in our warehouse and ready for shipment, you will receive an email. It will also contain a link that will allow you to track the package through your shipping partner. This way you can always check where your parcel is.
Technical questions
WHY IS NECESSARY TO DRY ROHACELL?
The creep compression resistance behaviour can be improved by drying Rohacell.
We recommend drying all grades at 125+5°C. The drying time depends on the thicknesss of the sheet: 5h for 24mm and less, up to 12h for 100mm and higher. Please request drying guideline documents via email.
Machining doesn’t necessarily require drying. But if Rohacell has to be dried, it should be dried pior to machining. Drying after machining can lead to a distortion of the shaped part due to internal stresses. The curing process conditions determine how long the foam can be exposed to environmental moisture before it shows excessive creep. Evonik recommend avoiding the foam absorbing moisture for more than a day. Ideally machined parts should be stored in moisture-proof bags.
As above, this depends on their curing process and also the relative surface of the part (the more surface per volume,the faster the foam will pick up moisture). The environmental conditions also play a role, with the foam picking up more moisture at higher relative humidity and temperature. Rohacell can generally be left for up to a day.
Primarily HT customers are in the aircraft industry. The main benefit is the higher creep resistance in the process, i.e. the foam can be cured at higher temperatures and pressures without collapsing. Curing it at 180°C requires HT (Manual aircraft resins have to be cured at 180°C).
For manufacturing procedures with curing temperatures between 125°C to 175°C, it is possible to heat treat IG-F. However, IG-F is intended for industrial applications that don’t require very high curing temperatures. Evonik have not heat treated this product and therefore have not produced a heat treated properties sheet.
Yes, it does. Imagine HT as an extreme drying process. If exposed to moisture from the environment, molecules will absorb moisture over time and lose the HT properties.
For many grades, Evonik use the same copolymer recipe to form different densities. In this case Evonik determine the final foam density by foaming temperature: the higher the temperature, the more the blowing agent expands and the lower the density. Foaming temperature and thermoforming temperature are related to some extent, the higher the foaming temperature, the higher the thermoforming temperature.
WHAT WOULD CAUSE A COLLAPSE IN THE ROHACELL FOAM?
If it is at room temperature: excessive mechanical loads. If the compressive strength limits are surpassed, cell walls will start crushing and the integrity of the foam will be lost. If it is at high temperatures: moisture.
The choice of adhesive depends on the required temperature resistance and the size of the area to be bonded. However, most adhesives are suited for Rohacell. The only concern is that the adhesive doesn’t bond by evapourating a solvent. Rohacell foam is nearly impermeable and it would take very long for the adhesive to cure.
– For small areas we recommend a 2 component Epoxy resin.
– For larger areas we recommend an Epoxy resin film.
OTHER MATERIALS?
Evonik recommend a 2 component Epoxy resin for small joining surfaces and a thermoplastic or thermoset film adhesive for a larger area.
Our cutting plants include a Horizontal Bandsaw, a Circular Saw and a Laser Machine.
Yes, Chem-craft technical team can deliver any 3D shape milling geometry which is feasibly to be manufactured on CNC machines.