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You are right Macgyver, This is what i first thought when i encountered with this problem. So i requested the gender list of customer complaint from customer service. Unfortunately almost half of complainers are woman only. But , what i tried in lab is that acetone , solvent , benzine and...

Hello Harry, today , i have tried to molding by using extreme holding pressure and times. I tried minimum and max. pressures and times. I didnt observe any major dimensional difference or swelling. Pat, Mold temperature is almost 23 C degree which is recommended by Bayer. I think that...

bayer desmopan document says that , contact of acetone , benzene , MEK , etit alcohol etc.. chemicals cause swelling. Today , i made a trial with these chemicals at lab. . Yes , sweeling is occured around %1-3 ratio. But it was reversible. When sweelled parts heated around 55 C degree. Parts...

Hello Pud, All parts are molded with the same injection parameters including holding pressure and time. But , Only %1-3 parts has come as customer complaint. If the reason of swelling had been high holding pressure , would swelling appear for all molded parts that has the same injection...

Hello Chris, My best guess was also contacting with chemicals because the weight of the cases had been increased after they come from customer(%1-3 weight increase , %6-10 volume increase) but i tried every chemicals i found in lab. I have even tried airplane fuel, interesting but i didnt...

We are producing cell phone cases completely made of TPU.(Bayer desmopan) Shore A 75. But we started to get some customer complaints on because cases are enlarging in all directions almost %6-10 scale ratio. We made lots of lab tests including thermal shock , chemicals etc.. but i didnt...

Hello thepooh. What is ATH? Do you know the exact formula of corian? Best Regards..

Hi all, I am looking for a bio-degradeable material that has shore A70 hardness. i want to use this material in place of shore A-70 TPU. It must be injection grade.. thank you for your helps..

Hello All, I need a coating supplier company abroad for coating satin(nickel) battery cover made of grade2 titanium and has 0.25 mm thickness. Satin on titanium part is decorative purpose. Any coating methods are acceptable. Adhering to titanium must be very strong and must not appear any...

Products are structural parts of a cell phone.Parts are formed by a progressive die. Material is ss316 and 0.3mm thickness. required minimum nickel thickness is 10microne. In fact , i really didnt understand why satin-nickel plating is required on ss316?Do you have an idea? Brightening...

Pat, there are some pvd optical anti-reflection coatings doesnt disrupt the transparency. they apply on eyeglass and good results can be achieved. But , i would rather to solve this through plastic operation.

Hello All, I have 2 questions; 1-) Sorry i am not familiar with chemical operations and i have never heard a coating process named "CHEMICAL ETCHED" In drawing it is typing " CHEMICAL ETCHED SATIN" This means satin electroplating ? 2-) Can SS316 be satin-nickel plated? thank you..

Hello suselinux, Thank you for your message. How about the transparency loss? Transparency is very important for my product. It must be like glass. I am curious about the acrylic sheet you suggested. Is there a web site refer to this pmma sheets?

Hello Chris, Thank you for your response. I agree with you. Gloss comes from the surface which is smooth like glass. but if we make microtexture on mold , Probably trancparency will also be reduced. Right? I will make microtexture on thermoform mold and i will evaluate the result.

Hello Everyone, I m looking for a kind of PET film or alternative material which is highly transparent but has nonreflective characteristic for clamshell/blister packaging. Blister package is shining under the spotlight of the shelf and the product inside the package can not seem properly. PET...

I am not adding anything , lubricant , masterbatch or any other chemicals. Raw material manufacturer can not say anything. He just told me that he couldnt gurantee anything. Thats why i intend to change the raw material. Now that , GPC , DSC testing is not working for determining the...

Hello Pat, Thanks for your helps. During my process pc/abs is not overheated , dried properly before molding and stays only max. 8 min. in barrel which is acceptable according to the raw material supplier. The mold is reverse mold and directly inject melting into the cavity and mold has cold...

Hi all, I want to ask questions regarding MFI value and degrading of pc/abs. Virgin PC/ABS's MFI value is 7 and PC/ABS molded part's value is 10. My customer insists on that increasing from 7 to 10 shows that there is a problem with my process and material was decomposed. In my opinion, MFI...

Last month , i was in china for plastic fair and was confirmed that iphone back cover is PC.

Hello cthompson, all these technics are geometry dependency production methods. Whats your product and geometry? overmold grade elastomeric materials are available for a strong bonding to abs , pc/abs etc.. If you dont have a double shot machine you can use two machines and two different...