Frequently asked questions
Answers to the questions asked most often by phone and WhatsApp, from price to samples, lead time to material selection. For a question not listed, write to us; if it comes up often we add it to the list.
What does Forbest Plastik sell?
Forbest Plastik sells raw materials to plastics manufacturers: engineering plastics (PA6, PA66, PBT, POM…), high-performance plastics (PPS, PEEK, PPSU…), commodity plastics (ABS, PC, PP, PE…), elastomers (TPE, TPU, TPV…), ready compounds and additives. Products are imported from overseas producers and shipped from the warehouse in Arnavutköy, İstanbul.
Is there a price list on the site?
No, there is no list price on the site; prices are given in a written quotation. Because raw-material prices depend on quantity, exchange rate, packaging and delivery terms, every quotation is dated and valid for the period stated in it. To request one, send the product code or application, the quantity and your process.
What is the minimum order quantity?
The minimum quantity depends on the product and stock; since standard packaging is 25 kg bags and 1,000 kg big-bags, quotations are usually based on these units. If you need a smaller quantity or a sample for a trial run, state it in the quote form and we will confirm availability in the quotation.
Can I get the technical data sheet (TDS) and safety data sheet (SDS)?
Yes, the supplier's TDS and SDS files are sent by e-mail with the quotation. The technical values on the site are typical ranges for the material family; the binding values are in the data sheet of the quoted grade. To see a specific grade's sheet in advance, use the 'Ask for technical support' link on the product page.
Do you send samples for trials?
Yes, trial samples are sent on request; no order is expected before you see the result in the mould or extruder. The sample quantity and shipping method are stated in the quotation. Along with the sample we share starting values for drying and processing temperature.
What is the lead time?
Lead time depends on whether the product is in stock and is confirmed in writing at order confirmation. Stock items in the Arnavutköy warehouse are palletised and dispatched after confirmation; for items not in stock or arriving by import, the lead time is stated separately in the quotation. Planned stock shortens lead times for regular purchases.
How are products packaged?
Standard packaging is 25 kg bags and 1,000 kg big-bags; shipments are palletised. Every pallet carries the product code and lot number, which is also on the delivery note. If you need different packaging (for example octabins), state it at the quotation stage.
Do you sell outside Türkiye?
Our main market is Türkiye; export requests are quoted separately according to product and quantity. You can send your request in English or Turkish; the quotation is given in writing with delivery terms (EXW, FOB etc.) and documents.
Can you find an equivalent to the commercial grade I use?
Yes, send the commercial name or data sheet of the grade you use; our technical team finds the equivalent in the same family and reinforcement level, compares the two data sheets side by side and tells you the differences. Equivalent means the same property profile, not the same code, so the comparison is always made on the TDS.
What do GF30, FR, NAT and BLACK mean in compound codes?
GF30 means 30% glass-fibre reinforcement by weight; FR, flame-retardant additive (usually targeting UL94 V-0); NAT, natural (unpigmented) colour; BLACK, black colour. For example 'PA66 GF30 BLACK' is a black, 30% glass-fibre polyamide 66. Older naming also uses GFR.
Is technical support charged?
Material selection and equivalent comparison are part of our sales process; there is no separate charge. When you describe your application, operating temperature and process, our technical team proposes the candidate family, reinforcement level and starting processing values.
Should I choose PA6 or PA66?
If the part runs continuously above 100 °C or creep resistance matters, PA66 is usually right; if surface quality and easy processing come first, PA6. PA66 melts 40 °C higher, has a narrower processing window and is usually more expensive; PA6 is tougher and fills more easily. Glass-fibre reinforcement raises stiffness and heat resistance markedly in both families.
Which materials must be dried before processing?
All moisture-absorbing polymers must be dried: polyamides (PA6, PA66, PPA), polyesters (PBT, PET, PETG), polycarbonate, PMMA, ABS, TPU and sulphones. Material processed without drying suffers chain scission by hydrolysis; parts turn brittle and show silver streaks and bubbles. Drying temperature and time are given in each product's TDS.
Which industries do you serve?
We supply raw materials to manufacturers in automotive, electrical and electronics, appliances and small domestic appliances, packaging, construction and building, furniture and consumer goods, and agriculture and irrigation. The material families each industry asks for most are listed on the industries page with product links.
Where are the warehouse and head office, and can I collect goods myself?
Our head office is in İkitelli OSB (Başakşehir, İstanbul) and our warehouse in Ömerli, Arnavutköy. Shipments leave from the warehouse; if you want to collect with your own vehicle, state it at order confirmation and we will schedule a loading day and time. Phone: 0212 671 20 91, WhatsApp: 0533 816 61 81.
Glossary: what does each term mean?
Short definitions of the terms that appear in quotations and data sheets. Ask about a term you cannot find; we add frequent ones to the list.
- TDS
- Technical data sheet: the mechanical, thermal and processing values the producer publishes for a grade. The binding values are here; site values are typical family ranges.
- SDS
- Safety data sheet: handling, storage and occupational-safety information. Sent with the quotation.
- MFR / MFI
- Melt flow rate: grams flowing in 10 minutes under a set temperature and load. Injection grades need high, extrusion grades low MFR.Example:
ISO 1133 · 230 °C / 2,16 kg - HDT
- Heat deflection temperature: the temperature at which a specimen deflects a set amount under standard load; indicates the load-bearing limit when hot.Example:
ISO 75 · 1,8 MPa - UL94
- Flammability classification of plastics. V-0 is the highest vertical-burn class; HB is horizontal burn. Flame-retardant grades are named by their target class.Example:
UL94 V-0 · V-2 · HB - Shore A / D
- Elastomer hardness scale: A for soft (rubber), D for hard plastics. TPE spans 15A–60D, TPU 60A–75D.
- GF / GFR
- Glass-fibre reinforcement; the number is the weight percentage (GF30 = 30%). Stiffness and HDT rise, impact and gloss fall.Example:
PA66 GF30 BLACK - FR
- Flame-retardant grade. Formulated with halogenated or halogen-free systems; mandatory in electrical and electronic parts.
- Compound
- Base polymer blended in an extruder with reinforcement, filler and additives and pelletised; goes straight into injection moulding.
- Masterbatch
- A concentrate with pigment or additive loaded at high level into a carrier polymer; dosed at 1–4% in production.
- NAT / BLACK
- Natural (unpigmented) and black colour. Natural grades are coloured with masterbatch; black grades usually come ready with carbon black.
- Geri kazanım (regrind)
- Grinding runners and rejects and blending them into virgin material. The ratio is limited in the TDS; lower for glass-fibre grades because fibres break.
The right raw material is one quotation away.
Send the product code or application, quantity and process; the technical team defines the candidate material and sales replies with price, lead time and the data sheet.