Engineering plastic injection molding materials suitable for mass production of transparent structural parts, impact-resistant housings, protective covers, instrument windows, electronic and electrical structural parts, automotive lamp covers, medical device housings, and medium- and high-performance plastic functional parts.
Polycarbonate (PC) is a commonly used high-performance engineering plastic material, also known as polycarbonate, which has good impact resistance, toughness, transparency, temperature resistance, dimensional stability, and mechanical strength. Polycarbonate (PC) is commonly used for transparent housings, protective covers, lens structural parts, electronic and electrical housings, automotive light covers, medical device housings, instrument windows, structural brackets, and injection-molded parts requiring high impact resistance. Compared to ABS, Polycarbonate (PC) has better strength, temperature resistance, and impact resistance; Compared to Acrylic (PMMA), Polycarbonate (PC) is more drop-resistant and impact-resistant, but its surface hardness and transparent sheen are usually not as good as Acrylic (PMMA).
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
It has good impact resistance, toughness, and good transparency, temperature resistance better than ABS and Acrylic (PMMA), good mechanical strength, good dimensional stability, suitable for injection molding, transparent parts, and structural parts, can be flame-retardant, and can be blended with ABS to form Polycarbonate (PC)+ABS improve processing and overall performance.
Transparent housings, protective covers, observation windows, instrument viewing windows, automotive light covers, electronic and electrical housings, medical device housings, consumer electronics structural parts, impact-resistant panels, switch panels, connector housings, lighting enclosures, industrial equipment housings, structural brackets, snap-fit parts, assembly housings, transparent functional samples, and bulk plastic parts.
Highly wear-resistant moving parts, high-strength acid-strong alkali environment parts, long-term strong solvent contact parts, high-optical precision lenses, long-term outdoor exposure without UV protection, high conductivity parts, high thermal conductivity parts, long-term direct contact parts for food, medical implants, ultra-low-cost ordinary housing parts, and transparent parts with extremely high scratch resistance and no hardened coating protection.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Engineering plastic injection molding materials suitable for mass production of transparent structural parts, impact-resistant housings, protective covers, instrument windows, electronic and electrical structural parts, automotive lamp covers, medical device housings, and medium- and high-performance plastic functional parts. |
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| Precision performance | Injection molding Polycarbonate (PC) is suitable for mass production of medium- and high-performance plastic parts, offering good dimensional stability, but actual accuracy is affected by material shrinkage, wall thickness, gate position, mold temperature, cooling system, product dimensions, transparency requirements, and injection molding parameters. Transparent parts are more sensitive to flow marks and internal stress; precision assembly positions, snaps, screw posts, transparent windows, and sealing surfaces should be prioritized during the mold design phase. |
| Dimensional tolerances | Conventional dimensional tolerances for injection molding Polycarbonate (PC) can be referenced ± 0.10mm to ±0.30mm, making small sizes and simple structures easier to control; Large parts, thin-walled parts, transparent parts, long strip parts, uneven thickness parts, and multi-rib structures may have deviations of ±0.30mm-±0.80mm or more. This value is a general reference range and is not an absolute guarantee tolerance for all structures. It is recommended to define tolerances separately for transparent assembly surfaces, snaps, screw posts, hole positions, and sealing structures. |
| Minimum Wall Thickness | Injection molding Polycarbonate (PC) recommends a minimum wall thickness of no less than 1.0mm. Small localized non-stressed areas can be used around 0.8mm, but large-area use is not recommended. Transparent and protective parts should not be too thin, otherwise insufficient filling, deformation, stress bleaching, or insufficient impact strength may occur. If the wall thickness is too thick, shrinkage, bubbles, increased cooling time, and internal stress accumulation are more likely. |
| Recommended wall thickness | Standard Polycarbonate (PC) enclosures and structural components are recommended at 1.5mm-2.5mm; transparent windows, protective covers, and impact-resistant structures are recommended at 2.0mm-3.0mm; large transparent housings, screw posts, snap bases, and assembly load-bearing positions are recommended to be appropriately thickened, and the risk of stress cracking is reduced through rounded corners, reinforcement ribs, and uniform wall thickness. |
| Minimum aperture | For injection molding Polycarbonate (PC) small holes, the recommended hole diameter should not be less than 1.0mm-1.5mm. Deep small holes and slender columns need to be evaluated in conjunction with mold insertion needle strength, venting, and molding stability. Screw holes, positioning holes, and assembly holes should consider shrinkage, draft angle, and subsequent assembly pressure. Holes for transparent parts should be kept away from edges and sharp corners to reduce the risk of cracking and whitening. |
| Assembly clearance | For ordinary plastic parts, it is recommended to reserve 0.10mm-0.30mm on one side; for movable parts, 0.30mm-0.50mm should be reserved on one side; for transparent parts, sprayed parts, scratch-resistant coated parts, and high-appearance parts, extra surface treatment thickness and scratch-resistant space should be reserved. The screw fixing position should not be too tight; it is recommended to reduce the risk of stress cracking by controlling the limit post, gasket, metal inserts, or torque. |
| Detailed performance | Injection molding Polycarbonate (PC) can achieve clear rib positions, column positions, snap-ons, textures, transparent windows, logos, and fine structures. Raised text, recessed text, and decorative textures are recommended to be no less than 0.3mm-0.5mm; structures that are too fine may weaken due to mold processing, injection molding flow, spraying, or transparency requirements. Details of transparent parts also need to consider optical distortion, shrinkage marks, weld lines, and internal stress. |
| Surface effect | Injection molding Polycarbonate (PC) can achieve transparent, semi-transparent, black, white, or other color appearances. Transparent Polycarbonate (PC) can achieve better light transmission, but its surface gloss and hardness are usually inferior to Acrylic (PMMA), making it prone to scratches. If necessary, a hardening coating can be added. Non-transparent Polycarbonate (PC) can be achieved with matte, fine-grained, leather-textured, or regular glossy finishes. Common treatment for appearance parts includes silkscreen printing, laser engraving, spraying, scratch-resistant coatings, anti-fog coatings, and UV-resistant coatings. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Transparent housings, protective covers, observation windows, instrument viewing windows, automotive light covers, electronic and electrical housings, medical device housings, consumer electronics structural parts, impact-resistant panels, switch panels, connector housings, lighting enclosures, industrial equipment housings, structural brackets, snap-fit parts, assembly housings, transparent functional samples, and bulk plastic parts.
Engineering plastic injection molding materials suitable for mass production of transparent structural parts, impact-resistant housings, protective covers, instrument windows, electronic and electrical structural parts, automotive lamp covers, medical device housings, and medium- and high-performance plastic functional parts.
The core feature of injection molding Polycarbonate (PC) is its excellent impact resistance, making it suitable for plastic parts that require drop resistance, protection, and structural strength. It can be made as transparent parts, as well as structural parts in black, white, or other colors. Polycarbonate (PC) has better temperature resistance and mechanical strength than common plastics such as ABS, Polypropylene (PP), Polyethylene (PE), and Acrylic (PMMA), but its material fluidity is relatively average, injection molding temperatures are higher, and there are strict requirements for mold temperature, drying, gate design, and stress control. Transparent Polycarbonate (PC) parts also require special attention to flow marks, gas marks, shrinkage, stress bleaching, and surface scratches.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for Polycarbonate (PC).
Post-processing of Polycarbonate (PC) affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds Polycarbonate (PC) material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If higher transparency and surface gloss are required, Acrylic (PMMA) can be chosen; If lower cost and better paint appearance are needed, ABS is available; If comprehensive appearance, toughness, and processability are needed, Polycarbonate (PC)+ABS can be chosen; If higher chemical resistance is required, Polybutylene Terephthalate (PBT), PPS, Polyether Ether Ketone (PEEK), or specific modified materials can be chosen; If higher wear resistance and lower friction are required, Acetal (POM) is an option; If long-term outdoor weather resistance is needed, UV-resistant Polycarbonate (PC), ASA, or Acrylic (PMMA) can be chosen; If metal rigidity and high load-bearing capacity are required, aluminum alloy, stainless steel, or zinc-aluminum die-cast parts can be chosen.
If customers require impact resistance, drop resistance, a transparent appearance, good temperature resistance, and high structural strength, injection molding Polycarbonate (PC) is an excellent choice. If the client mainly pursues high transparency and low impact requirements, Acrylic (PMMA) is more suitable; If customers mainly pursue low-cost casings and paint finishes, ABS or Polycarbonate (PC)+ABS is more economical; If customers need to use outdoors for extended periods, UV-resistant Polycarbonate (PC) or add surface hardening and UV-protective coatings.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
