What is the difference between polyurethane and other thermoplastic materials?
I would like to share with you the strengths and weaknesses of these “plastics”.
Polyurethane is a plastic material that I would define noble and elegant with very interesting technical characteristics, it is versatile and extraordinary for its qualities of adaptability and resistance.
By changing the formulation it can be soft and comfortable, rigid and load-bearing, elastic and very resistant to breakage and it can be fireproof (most polyurethanes also exist in self-extinguishing version in class V0).
The cost of polyurethane as a raw material is typically higher than the most common thermoplastic materials, even the cost of the piece is much higher than a plastic piece because the polyurethane molding process always requires the use of a dedicated operator even if the plant is automated. To cut down on time, a very large plant and a certain number of molds are required, which considerably reduce production times.
So far it seems that polyurethane is full of defects, but it is quite the contrary.
How many pieces can a production batch be?
In injection molding, lots with high volumes are required to amortize the costs of mold tooling, while in the case of polyurethane it is also possible to print small production batches, for example 30, 50 or 100 pieces at a time, a difference that allows you to organize your warehouse better.
Is it possible to insert elements of different kind of materials directly into the mold?
Of course, besides threaded inserts that can be inserted in an injection mold, polyurethane is a practice widely used to co-mold other elements of various materials, useful for solving coupling problems between the parts, improving the overall stiffness of the molded piece and / or to co-mold the aesthetic part in faux leather to obtain an aesthetically finished piece.
Is polyurethane a suitable outdoor material?
Yes, polyurethane is absolutely impervious to ultraviolet rays and atmospheric agents in general, it is an excellent material for outdoor exposure.
The fundamental difference is in the equipment needed for molding: in thermoplastic materials the molds are generally made of steel or of a material in any case suitable for withstanding high molding pressures with decidedly high costs.
In the case of polyurethane the molds are cheaper and we can make them in different materials, for example in aluminum or, with considerable savings in terms of costs, in epoxy resin, especially in the case of large pieces where technology without sustaining too expensive investments of polyurethane is convenient and competitive compared to other molding techniques.
Unlike other mold manufacturing companies, SD has decided to deal only with polyurethane to improve more and more and have the maximum know-how in this industry.
We are one of the few companies that can produce molds for all types of polyurethanes with all the technologies that allow it, resin, aluminum, iron, etc. … And to satisfy the various opportunities and requests in the sector, it’s placing us as a leader in the production of epoxy resin molds that can be an authentic alternative to the aluminum mold.
SD Stampi wants to be able to fully satisfy your requests, creating a relationship of trust, professionalism and collaboration.