38-400 White PP Child-Resistant Closure with MRPLN04 printed Liner

38-400 White PP Child-Resistant Closure with MRPLN04 printed Liner is a 38-400 child-resistant closure for buyers who need a controlled reclosure for compatible bottles and jars. The specification combines a white polypropylene shell, 38-400 neck finish and MRPLN04 printed liner reference. HIQ Packaging supports sample review, material confirmation, decoration questions and export packing before the buyer releases a production order.

38-400 Child-Resistant Closure at a glance

The public source SKU identifies the reference item used to prepare this listing. Final HIQ quotation, samples and production documents form the controlling reference for a repeat order. The quotation confirms availability and tooling together rather than relying on assumptions from the source catalogue.

How the 38-400 child-resistant closure works

A 38-400 child-resistant closure forms a packaging system, not only a cap. The intended opening sequence must be clear to an adult while reducing the chance of a young child opening the container during ordinary handling. This reference has a 38-400 finish and a child-resistant mechanism. Buyers should verify opening and reclosure force on the finished bottle, filled to the expected weight and using the approved liner.

Thread engagement, the stop position and the amount of downward pressure required all affect repeatability on capping equipment. Buyers should ask for application torque, removal torque, strip torque and opening-force data for the exact container and closure combination. A cap that performs correctly by hand can still stick, cross-thread or seal inconsistently when the filling line changes speed.

Liner and seal considerations for MRPLN04 printed

The source specification for this 38-400 child-resistant closure identifies a MRPLN04 printed liner. Confirm its facing material, compressibility, barrier requirements and sealing method with the closure supplier. The liner code alone is not enough to approve chemical compatibility or shelf-life performance.

Test the finished pack with the intended formula at the expected fill temperature. Store samples in the planned orientation and check for seepage, liner displacement, deformation and torque loss after transport simulation.

Applications and container compatibility

This 38-400 child-resistant closure supports compatibility review with pharmaceutical, nutraceutical, supplement, personal-care and household-product containers that use the same neck finish. Neck diameter alone is not sufficient evidence of fit. Confirm thread form, finish height, root and crest dimensions, continuous-thread geometry and the container’s dimensional tolerance. Buyers should sample the closure on the actual bottle or jar mould intended for production.

Applications can involve tablets, capsules, powders, gummies, liquids or other compatible contents. Final suitability depends on the product formula, closure and liner materials, filling process, torque settings and regulatory requirements for the destination market. Buyers should review any child-resistant or poison-prevention packaging obligations with their compliance team before artwork and production approval.

For powders and capsules, check whether the closure must reduce moisture ingress or control odor. For liquids, include the filled bottle in leak and transport testing because the closure may perform differently when the container sits inverted or faces vibration. Personal-care and household products require their own compatibility review when solvents, oils, acids or fragrance components can contact the liner edge.

Quality checks before bulk production

Use the same quality checklist for every 38-400 child-resistant closure sample and production lot.

• Measure critical closure dimensions and compare them with the approved drawing or physical sample.
• Check the liner position, surface, diameter and freedom from creases or contamination.
• Confirm color, surface finish, top decoration, ribbing and visible molding defects under representative lighting.
• Run application and removal-force tests with the actual bottle and filling equipment.
• Complete leakage, vacuum or pressure checks where the product and distribution method require them.
• Review carton count, pallet pattern, labeling and export protection before the first shipment.

Keep the approved closure, container, liner, torque settings and artwork together as one controlled specification. If another supplier changes resin, liner stock, mold or decoration, repeat the fit and sealing checks rather than accepting a nominal equivalent.

Questions to resolve during sampling

Ask which bottle mould and neck-finish drawing the supplier used for the closure sample. Confirm whether the buyer will use the closure for a single-use or repeated reclosure application, because the opening-force requirement and liner wear can differ. Review the direction and sequence of the opening action so instructions, labels and line training remain consistent.

If the top carries text, pictorial instructions or a logo, approve the production artwork on the actual closure surface. Check print position, color, wear and legibility after opening and reclosure. A visually correct proof can still perform poorly when the print follows the curvature of a ribbed or textured top.

Sampling and quotation for the 38-400 child-resistant closure

Send the bottle neck finish, product description, expected fill volume, annual quantity, destination and required sample date with the inquiry. Also state whether the closure must support induction sealing, a particular opening-force range or specific artwork on the top. The reference listing shows 1,500 pieces per case; confirm the current HIQ packing quantity in the quotation.

Request a populated sample through the HIQ Packaging inquiry form when the buyer must approve appearance, child-resistant operation or sealing performance. Learn more about the applicable U.S. Poison Prevention Packaging Act requirements as part of the compliance review.

Explore related closures and sourcing support

Compare more caps and closures, review compatible plastic bottles and jars, or read the plastic packaging China sourcing checklist. For a closure and bottle reviewed as one pack, send the dimensions and application details for this 38-400 child-resistant closure to HIQ Packaging.

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