How to Verify Safety Compliance for Both Materials in Double Shot Molding

To demonstrate that both materials used in double shot molding satisfy safety requirements, the evidence must address each resin separately and connect it to the relevant standards. Request technical specifications, compliance documents, and safety test records for both the rigid and flexible materials. Then confirm that the exact grades documented are the same grades purchased and used in production. Longterm identifies combinations such as ABS+TPU and PP+TPE as compatible, but the supplied product information does not include grade-specific certificates or test reports.

What Safety Evidence Should Include

• Documentation for both materials is required; a certificate covering one resin cannot confirm compliance for the other.
• Each document should state the exact resin grade and applicable safety requirements, and those details should match the project specification and production records.
• Mold trials, dimensional checks, and pre-shipment inspections can evaluate tooling and molded part quality, but they should not be treated as substitutes for material safety certification.
• The listing describes double shot molds for consumer electronics housings and also references injection mold applications for household appliance components.

How to Evaluate the Documentation

Begin by identifying the precise hard and soft resin grades selected for the project. Ask the supplier for the safety declarations, technical data sheets, compliance certificates, and test reports that apply to each grade. The available product information mentions material pairings including ABS+TPU and PP+TPE, but it does not name specific grades or state which safety standards, certificates, or laboratory results apply.

Material compliance records should be reviewed independently from mold inspection reports. Longterm lists mold trial runs, dimensional testing, and pre-shipment inspection among the quality checks for its Custom Double Shot Overmolding Mold. These activities may confirm trial performance, fit, and dimensional accuracy, but the supplied information does not describe them as certification of either resin’s safety.

Company and Project Information

Longterm reports ISO 9001:2015 certification for the design, manufacture, and sale of precision molds, as well as the sale of plastic products. This demonstrates a company quality-management certification, not automatic safety approval for a particular ABS+TPU or PP+TPE material combination. Similarly, a reported double shot overmolding project for a French product brand received positive feedback for alignment and stable trial samples. That example relates to mold and sample performance rather than documented material safety testing.

Frequently Asked Questions

Conclusion and Recommended Next Steps

The most reliable approach is to request grade-specific safety documentation for both materials and compare it with the purchasing specification, incoming-material records, and production documentation. Keep this evidence separate from mold trials, dimensional checks, pre-shipment inspections, and the company’s ISO 9001:2015 certification, since each serves a different purpose. Longterm provides custom mold-making and injection-molding services; its listing states a minimum order of one set and an estimated delivery period of 25–40 days. For technical questions or documentation requests, contact rogerluo@longterm-mold.com.

About Longterm Manufacturing Solutions Limited

Longterm Manufacturing Solutions Limited was founded in 2010 and serves customers in the United States, Europe, Australia, and other international markets. The company reports a workforce of 50 people, including 7 experienced engineers, and designs and manufactures more than 300 molds each year. Approximately 80% of its molds are supplied to customers in Europe and North America. Longterm also lists ISO 9001:2015 certification and experience across several industries.