--- title: "What are the key material properties of PA6 for power tool cases?" description: "A project engineer struggles with PA6 sample failures for a new tool case. The analysis provides a practical guide to material selection, processing adjustments, and design optimizations to ensure durability and cost-effective production." url: "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html" language: "en" type: "Q&A" category: "Plastic Components Q&A" datePublished: "2026-08-28" dateModified: "2026-08-28" brand: "OK TOOL" manufacturer: "OK TOOL" answerCount: 10 --- # What are the key material properties of PA6 for power tool cases? ## Question I'm the project engineer for a new cordless drill platform launch, and we're finalizing the material for the carrying case. Our design team specified PA6 for its balance of toughness and cost, but the first round of samples from a potential supplier has me concerned. The latch area cracked during our standard 1.5-meter drop test, and several cases showed noticeable warping, making them sit unevenly. The supplier insists it's a "standard PA6 formulation" and the design is too demanding. My dilemma is whether to push for a different PA6 grade, switch entirely to a material like PA66 or PP, or demand a redesign. I need to make a data-driven recommendation to my manager that balances performance, tooling cost (we've already committed to a mold base), and project timeline. What specific material characteristics should I be evaluating beyond the generic datasheet numbers, and what are the most likely root causes for the cracking and warpage in a tool case application? I need practical, manufacturing-focused insights to guide our next steps. ## Answers ### Answer 1 — Best Answer The cracking and warping you're experiencing are classic symptoms of a mismatch between the material's capabilities, the part design, and the molding process. Your supplier's "standard PA6" comment is a red flag; for power tool cases, the specific grade, additives, and processing are critical. Let's diagnose the root causes and outline actionable solutions. The primary cause of cracking in the latch area is likely insufficient impact strength at the stress concentration points. A generic, unmodified PA6 has good stiffness but can be notch-sensitive. The drop test creates a high, instantaneous load. The root cause is often the material grade itself. You need a **toughened or impact-modified PA6 grade**. These blends incorporate elastomers or other polymers to significantly increase Izod and Charpy impact strength, especially at room temperature and below, without sacrificing too much rigidity. Don't just look at tensile strength; demand data on notched impact strength at -20°C to 23°C. If the supplier cannot provide this, they are not using an appropriate grade for a protective case. Warpage stems from uneven cooling and internal stresses. PA6 has a higher moisture absorption rate and a more pronounced shrinkage profile than materials like PP. If the mold cooling is not optimized—particularly around thick ribs or bosses near the case's flat walls—differential shrinkage will pull the part out of shape. Furthermore, if the resin is not properly dried before processing (PA6 is highly hygroscopic), the residual moisture will vaporize during molding, causing splay marks and weakening the polymer, contributing to both warpage and brittleness. Your path forward involves three concurrent actions: material requalification, design for manufacturability (DFM) review, and process auditing. First, require the supplier to identify the exact PA6 grade (including manufacturer and product code) and provide certified test reports for impact strength and moisture content after drying. Evaluate switching to a toughened PA6 or, if the cost allows, a PA66 grade. PA66 offers higher heat deflection temperature and slightly better mechanicals but is more expensive and can be trickier to process. PP is far less expensive and warps less but lacks the structural rigidity and scratch resistance for a premium tool case feel; it's a compromise. Second, conduct a focused DFM review. The cracking likely occurs at a sharp corner or a sudden thickness change near the latch. Request a fillet radius of at least 1.5mm at all internal corners in high-stress areas. For warping, examine wall thickness uniformity. Aim for consistent nominal walls, and if ribs are necessary for stiffness, their thickness should be 50-60% of the adjacent wall to prevent sink marks and cooling issues. The gate location is also crucial; it should facilitate uniform flow to minimize orientation-induced stress. Third, audit the supplier's process. Confirm their drying protocol: PA6 typically requires drying at 80°C for 4-6 hours to achieve moisture content below 0.2%. Review their mold temperature settings—a higher, consistent mold temperature (e.g., 80-90°C) can reduce internal stress and warpage. Finally, the packing and cooling phases must be optimized to hold pressure adequately to compensate for shrinkage without overpacking, which creates its own stresses. Do not accept a blanket "design is too demanding" statement. A well-specified, properly processed PA6 is absolutely capable of meeting 1.5-meter drop test standards for tool cases. Your recommendation should be to pause and resolve these specifics before proceeding. The alternative—launching with a failing case—carries far higher cost in warranty returns and brand damage than a short delay for engineering validation. **status:** accepted **Author:** Linda Xu **Date:** 2026-08-28 ### Answer 2 From a machining standpoint, if your case design includes any metal inserts or requires post-molding CNC operations like drilling for custom latches, the choice of PA6 grade is critical. A glass-filled PA6, often considered for added stiffness, becomes abrasive and can rapidly wear standard tooling. For any machined features, specify an unfilled or mineral-filled toughened grade. The achievable tolerances for CNC operations on PA6 are generally good, but you must account for material relaxation after molding. It's advisable to incorporate a stress-relief step or allow the parts to condition for 24 hours before secondary machining to prevent dimensional drift. For surface finish on machined areas, a sharp, high-positive rake tool with ample coolant is needed to avoid melting or fuzzing the polymer fibers, which could affect latch engagement smoothness. **status:** suggested **Author:** Kevin Liu **Date:** 2026-08-28 ### Answer 3 The core of your issue lies in material specification. "PA6" is a family, not a single material. For tool cases, you must evaluate the trade-off between stiffness, impact, and cost. A standard, unmodified PA6 homopolymer is too brittle. You need a copolymer or an impact-modified blend. Key data points to request: notched Izod impact strength (should be >10 kJ/m² at 23°C), flexural modulus for stiffness, and melt flow rate (MFR) for processability. Consider a grade with a nucleating agent for faster cycling and reduced warpage. While PA66 offers ~15-20% higher mechanical properties, it comes at a 20-30% material cost premium and requires higher processing temperatures. A properly formulated PA6 can meet most tool case needs at a better cost-performance ratio. Always ask for the technical datasheet and, if possible, a small sample of the granulate for your own verification. **status:** suggested **Author:** Michael Wu **Date:** 2026-08-28 ### Answer 4 The mold itself is a significant factor in warpage and part strength. For a large, flat part like a tool case, mold cooling line layout is paramount. Uneven cooling is the primary driver of warp. The tooling engineer must ensure symmetrical, turbulent water flow on both mold halves to extract heat uniformly. Steel selection matters: for long-run production of abrasive or glass-filled grades, a pre-hardened steel like P20 may suffice, but for superior polish and durability, H13 is preferred. Furthermore, the mold must be designed to withstand the high clamping forces needed for PA6, which has a higher shrinkage rate than PP. Inadequate clamping can cause flash, which is often trimmed, creating stress risers that could link to your cracking issue during impact. **status:** suggested **Author:** Eric Zhao **Date:** 2026-08-28 ### Answer 5 Viewing this as a process yield issue, the cracking and warping represent critical defects that must be addressed at source. Start by mapping the process variables: drying time/temperature, barrel temperatures, injection speed, packing pressure/time, and cooling time. A factorial DOE (Design of Experiments) on these parameters can identify the optimal window that minimizes stress and maximizes impact strength. Often, increasing mold temperature and optimizing packing profile can reduce internal stress by 30-40%, directly improving drop test performance. Implement Statistical Process Control (SPC) on key dimensions prone to warping from the first sample shots to establish a control baseline. This data-driven approach moves the conversation from subjective blame to objective process capability. **status:** suggested **Author:** Daniel Yang **Date:** 2026-08-28 ### Answer 6 The gate location and part geometry dictated by the mold design directly influence your problems. Cracking at the latch suggests a weld line or high molecular orientation in that area due to poor flow path. The gate should be positioned so that flow fronts merge well away from high-stress zones. For a clamshell case, a fan gate along the spine can often provide the most uniform fill. Regarding warpage, large, flat surfaces are challenging. Incorporating subtle crowned surfaces (slight convex curves) of 0.5-1.0mm across the flat panel can make warpage imperceptible and add stiffness. Also, ensure rib patterns are symmetrical to balance shrinkage forces. A DFM review should focus on these mold-specific factors, not just the part's digital geometry. **status:** suggested **Author:** Sophia Wang **Date:** 2026-08-28 ### Answer 7 Your failure points define the new inspection criteria. For incoming quality control (IQC), mandate a certificate of analysis for each material batch, checking moisture content and melt flow rate. For in-process checks (IPQC), establish go/no-go gauges for critical flatness dimensions and use a durometer to check material hardness as a proxy for proper curing. For the final outgoing quality control (OQC), a periodic destructive test is essential. Implement a sampling plan where cases from the production line undergo a controlled drop test from 1.2 meters (a safety margin below your 1.5m spec) onto concrete at the critical corner. Documenting failure modes here provides continuous feedback to the process and design teams. **status:** suggested **Author:** Amy Li **Date:** 2026-08-28 ### Answer 8 The injection molding parameters are the final adjustment knob. For PA6, a common mistake is using too low a melt temperature, which increases viscosity and requires higher injection pressure, inducing more stress. Aim for a melt temperature in the range of 260-280°C. To combat warpage, a higher mold temperature (80-95°C) is non-negotiable; it allows the polymer chains to relax and crystallize more uniformly, reducing differential shrinkage. The packing pressure must be sufficient to pack out the part but should be tapered off to avoid over-packing the gate area, which can freeze off prematurely and leave the distant sections under-packed. A slow injection speed can sometimes help reduce molecular orientation, improving impact strength in the flow direction. **status:** suggested **Author:** Olivia Chen **Date:** 2026-08-28 ### Answer 9 Consider the case's entire lifecycle. The drop test simulates a real-world scenario, but also consider UV exposure if tools are left in trucks, chemical resistance to oils and cleaners, and the repeated stress of latches opening and closing. A toughened PA6 generally has good chemical resistance, but for UV stability, you may need an additive. The warping issue affects not just aesthetics but also the seal against dust and moisture. Does the warped lid prevent a proper gasket seal? Validate the final assembly with all internal foam inserts and tools; sometimes, the internal components can help brace the case, mitigating perceived warpage. Your functional requirements should drive the material and process specs, not the other way around. **status:** suggested **Author:** Emily Chen **Date:** 2026-08-28 ### Answer 10 For mass production consistency, cycle time and automation compatibility are key. PA6's faster crystallization than PP can lead to shorter cycle times, but the necessary higher mold temperature and potential need for longer cooling to minimize warpage can offset that gain. Evaluate the production line: can the robot consistently handle a potentially warped part? Warped cases may jam in automatic conveyors or nesting fixtures. The solution is to fix the warpage at the process level, not to work around it. Implementing automated vision inspection for critical flatness and latch integrity at the end of the molding cell can catch drifts before they become batches of scrap, ensuring every unit shipped meets the drop test standard by design. **status:** suggested **Author:** David Zhang **Date:** 2026-08-28 ## Related Resources - [Plastic Components Q&A](https://www.jaterson.com/qa/plastic-components/) - [Plastic Components](https://www.jaterson.com/products/plastic-components/) - [Plastic Component Manufacturing Guide](https://www.jaterson.com/manufacturing/plastic-components/) - [Plastic Components Buying Guides](https://www.jaterson.com/buying/plastic-components/) - [Capabilities](https://www.jaterson.com/capabilities/) - [Custom Manufacturing](https://www.jaterson.com/custom-manufacturing/) - [Manufacturing Knowledge Base](https://www.jaterson.com/knowledge/) - [Plastic Components](https://www.jaterson.com/knowledge/plastic-components/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "What are the key material properties of PA6 for power tool cases?", "text": "I'm the project engineer for a new cordless drill platform launch, and we're finalizing the material for the carrying case. Our design team specified PA6 for its balance of toughness and cost, but the first round of samples from a potential supplier has me concerned. The latch area cracked during our standard 1.5-meter drop test, and several cases showed noticeable warping, making them sit unevenly. The supplier insists it's a "standard PA6 formulation" and the design is too demanding. My dilemma is whether to push for a different PA6 grade, switch entirely to a material like PA66 or PP, or demand a redesign. I need to make a data-driven recommendation to my manager that balances performance, tooling cost (we've already committed to a mold base), and project timeline. What specific material characteristics should I be evaluating beyond the generic datasheet numbers, and what are the most likely root causes for the cracking and warpage in a tool case application? I need practical, manufacturing-focused insights to guide our next steps.", "answerCount": 10, "upvoteCount": 11, "datePublished": "2026-08-28T00:55:49Z", "dateModified": "2026-08-28T01:02:16Z", "author": { "@type": "Person", "name": "Anonymous", "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "The cracking and warping you're experiencing are classic symptoms of a mismatch between the material's capabilities, the part design, and the molding process. Your supplier's "standard PA6" comment is a red flag; for power tool cases, the specific grade, additives, and processing are critical. Let's diagnose the root causes and outline actionable solutions. The primary cause of cracking in the latch area is likely insufficient impact strength at the stress concentration points. A generic, unmodified PA6 has good stiffness but can be notch-sensitive. The drop test creates a high, instantaneous load. The root cause is often the material grade itself. You need a toughened or impact-modified PA6 grade . These blends incorporate elastomers or other polymers to significantly increase Izod and Charpy impact strength, especially at room temperature and below, without sacrificing too much rigidity. Don't just look at tensile strength; demand data on notched impact strength at -20°C to 23°C. If the supplier cannot provide this, they are not using an appropriate grade for a protective case. Warpage stems from uneven cooling and internal stresses. PA6 has a higher moisture absorption rate and a more pronounced shrinkage profile than materials like PP. If the mold cooling is not optimized—particularly around thick ribs or bosses near the case's flat walls—differential shrinkage will pull the part out of shape. Furthermore, if the resin is not properly dried before processing (PA6 is highly hygroscopic), the residual moisture will vaporize during molding, causing splay marks and weakening the polymer, contributing to both warpage and brittleness. Your path forward involves three concurrent actions: material requalification, design for manufacturability (DFM) review, and process auditing. First, require the supplier to identify the exact PA6 grade (including manufacturer and product code) and provide certified test reports for impact strength and moisture content after drying. Evaluate switching to a toughened PA6 or, if the cost allows, a PA66 grade. PA66 offers higher heat deflection temperature and slightly better mechanicals but is more expensive and can be trickier to process. PP is far less expensive and warps less but lacks the structural rigidity and scratch resistance for a premium tool case feel; it's a compromise. Second, conduct a focused DFM review. The cracking likely occurs at a sharp corner or a sudden thickness change near the latch. Request a fillet radius of at least 1.5mm at all internal corners in high-stress areas. For warping, examine wall thickness uniformity. Aim for consistent nominal walls, and if ribs are necessary for stiffness, their thickness should be 50-60% of the adjacent wall to prevent sink marks and cooling issues. The gate location is also crucial; it should facilitate uniform flow to minimize orientation-induced stress. Third, audit the supplier's process. Confirm their drying protocol: PA6 typically requires drying at 80°C for 4-6 hours to achieve moisture content below 0.2%. Review their mold temperature settings—a higher, consistent mold temperature (e.g., 80-90°C) can reduce internal stress and warpage. Finally, the packing and cooling phases must be optimized to hold pressure adequately to compensate for shrinkage without overpacking, which creates its own stresses. Do not accept a blanket "design is too demanding" statement. A well-specified, properly processed PA6 is absolutely capable of meeting 1.5-meter drop test standards for tool cases. Your recommendation should be to pause and resolve these specifics before proceeding. The alternative—launching with a failing case—carries far higher cost in warranty returns and brand damage than a short delay for engineering validation.", "upvoteCount": 11, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#acceptedAnswer", "datePublished": "2026-08-28T01:49:37Z", "author": {"@type": "Person","name": "Linda Xu","url": "https://www.jaterson.com/team/linda.html"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "From a machining standpoint, if your case design includes any metal inserts or requires post-molding CNC operations like drilling for custom latches, the choice of PA6 grade is critical. A glass-filled PA6, often considered for added stiffness, becomes abrasive and can rapidly wear standard tooling. For any machined features, specify an unfilled or mineral-filled toughened grade. The achievable tolerances for CNC operations on PA6 are generally good, but you must account for material relaxation after molding. It's advisable to incorporate a stress-relief step or allow the parts to condition for 24 hours before secondary machining to prevent dimensional drift. For surface finish on machined areas, a sharp, high-positive rake tool with ample coolant is needed to avoid melting or fuzzing the polymer fibers, which could affect latch engagement smoothness.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-2", "datePublished": "2026-08-28T01:48:38Z", "author": {"@type": "Person","name": "Kevin Liu","url": "https://www.jaterson.com/team/kevin.html"} } , { "@type": "Answer", "text": "The core of your issue lies in material specification. "PA6" is a family, not a single material. For tool cases, you must evaluate the trade-off between stiffness, impact, and cost. A standard, unmodified PA6 homopolymer is too brittle. You need a copolymer or an impact-modified blend. Key data points to request: notched Izod impact strength (should be >10 kJ/m² at 23°C), flexural modulus for stiffness, and melt flow rate (MFR) for processability. Consider a grade with a nucleating agent for faster cycling and reduced warpage. While PA66 offers ~15-20% higher mechanical properties, it comes at a 20-30% material cost premium and requires higher processing temperatures. A properly formulated PA6 can meet most tool case needs at a better cost-performance ratio. Always ask for the technical datasheet and, if possible, a small sample of the granulate for your own verification.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-3", "datePublished": "2026-08-28T01:33:37Z", "author": {"@type": "Person","name": "Michael Wu","url": "https://www.jaterson.com/team/michael.html"} } , { "@type": "Answer", "text": "The mold itself is a significant factor in warpage and part strength. For a large, flat part like a tool case, mold cooling line layout is paramount. Uneven cooling is the primary driver of warp. The tooling engineer must ensure symmetrical, turbulent water flow on both mold halves to extract heat uniformly. Steel selection matters: for long-run production of abrasive or glass-filled grades, a pre-hardened steel like P20 may suffice, but for superior polish and durability, H13 is preferred. Furthermore, the mold must be designed to withstand the high clamping forces needed for PA6, which has a higher shrinkage rate than PP. Inadequate clamping can cause flash, which is often trimmed, creating stress risers that could link to your cracking issue during impact.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-4", "datePublished": "2026-08-28T01:25:55Z", "author": {"@type": "Person","name": "Eric Zhao","url": "https://www.jaterson.com/team/eric.html"} } , { "@type": "Answer", "text": "Viewing this as a process yield issue, the cracking and warping represent critical defects that must be addressed at source. Start by mapping the process variables: drying time/temperature, barrel temperatures, injection speed, packing pressure/time, and cooling time. A factorial DOE (Design of Experiments) on these parameters can identify the optimal window that minimizes stress and maximizes impact strength. Often, increasing mold temperature and optimizing packing profile can reduce internal stress by 30-40%, directly improving drop test performance. Implement Statistical Process Control (SPC) on key dimensions prone to warping from the first sample shots to establish a control baseline. This data-driven approach moves the conversation from subjective blame to objective process capability.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-5", "datePublished": "2026-08-28T01:20:07Z", "author": {"@type": "Person","name": "Daniel Yang","url": "https://www.jaterson.com/team/daniel.html"} } , { "@type": "Answer", "text": "The gate location and part geometry dictated by the mold design directly influence your problems. Cracking at the latch suggests a weld line or high molecular orientation in that area due to poor flow path. The gate should be positioned so that flow fronts merge well away from high-stress zones. For a clamshell case, a fan gate along the spine can often provide the most uniform fill. Regarding warpage, large, flat surfaces are challenging. Incorporating subtle crowned surfaces (slight convex curves) of 0.5-1.0mm across the flat panel can make warpage imperceptible and add stiffness. Also, ensure rib patterns are symmetrical to balance shrinkage forces. A DFM review should focus on these mold-specific factors, not just the part's digital geometry.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-6", "datePublished": "2026-08-28T01:18:52Z", "author": {"@type": "Person","name": "Sophia Wang","url": "https://www.jaterson.com/team/sophia.html"} } , { "@type": "Answer", "text": "Your failure points define the new inspection criteria. For incoming quality control (IQC), mandate a certificate of analysis for each material batch, checking moisture content and melt flow rate. For in-process checks (IPQC), establish go/no-go gauges for critical flatness dimensions and use a durometer to check material hardness as a proxy for proper curing. For the final outgoing quality control (OQC), a periodic destructive test is essential. Implement a sampling plan where cases from the production line undergo a controlled drop test from 1.2 meters (a safety margin below your 1.5m spec) onto concrete at the critical corner. Documenting failure modes here provides continuous feedback to the process and design teams.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-7", "datePublished": "2026-08-28T01:13:56Z", "author": {"@type": "Person","name": "Amy Li","url": "https://www.jaterson.com/team/amy.html"} } , { "@type": "Answer", "text": "The injection molding parameters are the final adjustment knob. For PA6, a common mistake is using too low a melt temperature, which increases viscosity and requires higher injection pressure, inducing more stress. Aim for a melt temperature in the range of 260-280°C. To combat warpage, a higher mold temperature (80-95°C) is non-negotiable; it allows the polymer chains to relax and crystallize more uniformly, reducing differential shrinkage. The packing pressure must be sufficient to pack out the part but should be tapered off to avoid over-packing the gate area, which can freeze off prematurely and leave the distant sections under-packed. A slow injection speed can sometimes help reduce molecular orientation, improving impact strength in the flow direction.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-8", "datePublished": "2026-08-28T01:11:28Z", "author": {"@type": "Person","name": "Olivia Chen","url": "https://www.jaterson.com/team/olivia.html"} } , { "@type": "Answer", "text": "Consider the case's entire lifecycle. The drop test simulates a real-world scenario, but also consider UV exposure if tools are left in trucks, chemical resistance to oils and cleaners, and the repeated stress of latches opening and closing. A toughened PA6 generally has good chemical resistance, but for UV stability, you may need an additive. The warping issue affects not just aesthetics but also the seal against dust and moisture. Does the warped lid prevent a proper gasket seal? Validate the final assembly with all internal foam inserts and tools; sometimes, the internal components can help brace the case, mitigating perceived warpage. Your functional requirements should drive the material and process specs, not the other way around.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-9", "datePublished": "2026-08-28T01:09:22Z", "author": {"@type": "Person","name": "Emily Chen","url": "https://www.jaterson.com/team/emily.html"} } , { "@type": "Answer", "text": "For mass production consistency, cycle time and automation compatibility are key. PA6's faster crystallization than PP can lead to shorter cycle times, but the necessary higher mold temperature and potential need for longer cooling to minimize warpage can offset that gain. Evaluate the production line: can the robot consistently handle a potentially warped part? Warped cases may jam in automatic conveyors or nesting fixtures. The solution is to fix the warpage at the process level, not to work around it. Implementing automated vision inspection for critical flatness and latch integrity at the end of the molding cell can catch drifts before they become batches of scrap, ensuring every unit shipped meets the drop test standard by design.", "upvoteCount": 0, "url": "https://www.jaterson.com/qa/pa6-material-properties-power-tool-cases.html#suggestedAnswer-10", "datePublished": "2026-08-28T01:02:16Z", "author": {"@type": "Person","name": "David Zhang","url": "https://www.jaterson.com/team/david.html"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.jaterson.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.jaterson.com/qa/"},{"@type": "ListItem", "position": 3, "name": "Plastic Components Q&A", "item": "https://www.jaterson.com/qa/plastic-components/"} ,{"@type": "ListItem", "position": 4, "name": "What are the key material properties of PA6 for power tool cases?"} ] } ] ```