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Xiamen Better Silicone Rubber Co., Ltd · Xiamen, China rubber@better-silicone.com +86 17700081836
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Frequently asked questions

The questions buyers ask us most, answered straight.

What is the minimum order quantity?

It depends on the process and the part. Compression moulded parts can run in the low thousands, and LSR injection parts usually need higher volumes to justify the tool. Tell us your annual quantity and we will tell you which process gives you the lowest total cost, tooling included.

Do you build the moulds yourselves?

Yes. Every tool we run is designed and cut in our own mould shop on imported automated mould making equipment, for liquid silicone injection, compression and plastic injection alike. Nothing is subcontracted to a separate tool room, so a dimensional correction takes days rather than weeks.

What do you need from me to quote?

A 2D drawing, a 3D model (STEP or IGES) or a physical sample, plus the material, hardness, colour, annual quantity and the application. If you are not sure about material or hardness, describe the service conditions and we will propose something.

How long does tooling take?

Tooling lead time depends on cavitation and complexity. We give a firm tooling schedule with the quote, along with a design for manufacture review that flags any geometry that will cost you money in production before the tool is cut.

Can you produce medical parts?

Yes. We hold ISO 13485:2016 alongside ISO 9001:2015, and medical product runs in the clean room with a dedicated post curing oven so that it never shares equipment with food grade or industrial product.

Which certifications do you hold?

ISO 13485:2016, ISO 9001:2015 and BSCI at company level, plus FDA, LFGB, RoHS, PAHs, CE, FCC and CPC documentation at product and material level. Certificates are on the quality page and copies are available on request.

What is the difference between compression and injection moulding?

Compression puts a preform into an open cavity and closes the press on it: cheap tooling, no runner waste, best for flat and shallow parts. Injection fills a closed tool through a runner or cold runner system: faster cycles, finer detail, tighter tolerances, more expensive tooling. Volume and geometry decide which one is cheaper per part.

Should I use solid silicone or liquid silicone rubber?

Solid silicone (HTV) is milled, weighed and compression moulded, which keeps tooling cost down and suits large or flat parts. LSR is dosed and injected automatically, which suits thin walls, fine detail, high volume and any part where manual handling would cause cosmetic rejects. Medical valves, membranes and baby nipples are almost always LSR.

Can you print or coat the parts?

Yes. We run silk screen printing, pad transfer printing, laser etching, epoxy doming, PU protective coating and oil or matte spray coating, all in clean rooms, with a UV activation system for repeatable adhesion and an automatic paint line for batch consistency.

Do you supply finished, packed products?

Yes. Our assembly plant handles product and part assembly, die cutting, adhesive backing and packaging, so we can ship a packed retail unit with your artwork rather than a bag of loose mouldings.

Can you match a colour?

Yes. Rubber is mixed and colour matched in a dedicated clean mixing room. Send a Pantone reference or a physical sample.

Why do my compression moulded silicone parts bloom?

Blooming is usually incomplete cure or an additive migrating to the surface. Post curing normally clears it. We cover the causes in detail in our technical articles.

Can you make parts without a visible parting line?

Yes. Where the parting line cannot be tolerated on the visible or sealing face, we add a surface grinding operation rather than leaving the witness mark on the part.

Where are you located and can I visit?

Our office is in Huli District, Xiamen, and the factory is in the Si'ming Park industry cluster zone in Tong'an District, Xiamen. Customers visit regularly and we are happy to arrange a factory tour.

Question not answered here?

Ask us directly. We answer quickly and we do not pad it out.