Custom Corrugated Plastic Divider / Knife Card Insert

Name: Custom Corrugated Plastic Divider / Knife Card Insert
Brand: Jinmai Plastic

Name: Custom Corrugated Plastic Divider / Knife Card Insert

Brand: JinMai

Place of Origin: Guangdong, China

Material: PP Hollow Sheet / Corrugated Plastic Sheet

Structure: Interlocking Cross-Slot Grid (Knife Card), Parallel Partition, Finger-Notch Insert, Custom Layout

Thickness: Custom according to part weight, cell span and container size

Color: Blue, Black, White, Grey, Custom Colors

Size: Custom Outer Dimensions, Cell Size and Compartment Count

Surface & Lining Options: Smooth PP Surface, Optional Non-Woven / Flannel Laminated Surface for Scratch-Sensitive Parts

Material Grade Options: Standard PP, Optional Anti-Static / Conductive ESD Grade per Project Requirement

Application: Internal Box Partitions, Automotive & Hardware Parts, Electronics Turnover, Glass & Bottle Separation

OEM&ODM: Accept

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Product Details
Why JinMai Plastic?
FAQs
Packing & Delivery

Custom Corrugated Plastic Dividers / Knife Card Inserts for Industrial Packaging

Corrugated plastic dividers, also known as PP hollow sheet knife cards, interlocking grid partitions or coroplast box inserts, are custom-cut internal separators made from fluted polypropylene sheet. They divide tote boxes, corrugated plastic containers and export cartons into individual cells so parts do not collide, rub or mix during factory turnover and shipping.

Jinmai manufactures custom divider sets according to your part dimensions, container internal size, cell count and handling workflow. Buyers can specify standard interlocking cross-slot grids, parallel slot partitions with finger cutouts, or surface-laminated inserts for scratch-sensitive components.

What Is a Corrugated Plastic Knife Card Divider?

A knife card divider is built from longitudinal and transverse PP hollow sheet strips that are die-cut with precision slots and assembled into a grid. Because polypropylene hollow sheet is lightweight, moisture-resistant and wipe-clean, these dividers last through repeated returnable packaging cycles where paperboard partitions quickly fray, absorb moisture or collapse.

Common Divider Configurations

Interlocking cross-slot grids (knife cards): Longitudinal and transverse strips slot together to form multi-cell compartments for small to medium industrial parts.
Parallel slot partitions: Parallel divider boards with U-shaped finger notches for long components, circuit boards or sub-assemblies.
Laminated / soft-surface dividers: PP hollow sheet partitions laminated with soft fabric or non-woven material when painted, polished or high-gloss parts require extra scratch protection.
Multi-layer divider + layer pad systems: Combining grid dividers with flat PP layer pads to stack multiple tiers of parts inside one turnover box.
Optional ESD divider inserts: Manufactured from anti-static or conductive PP hollow sheet when specified for static-sensitive electronics packaging.

Key Specifications Buyers Should Confirm

Specification	What to Confirm	Why It Matters
Container inner size	Internal length, width and usable height of the box or tote	Ensures the assembled divider grid fits without buckling or excessive play
Part size & clearance	Max length, width, height and weight of each part plus handling clearance	Determines individual cell dimensions and whether finger notches are needed
Cell layout	Row × column count (e.g., 2×3, 3×4, 4×6) and single or multi-layer stacking	Controls packing density, box weight and operator loading speed
Sheet thickness	Selected based on part weight, cell span and container size	Balances partition rigidity against usable internal space
Surface & material option	Standard PP, soft laminated surface, or optional ESD material	Matches surface-finish protection or static-control requirements

PP Hollow Sheet Dividers vs Cardboard Partitions

Comparison	PP Hollow Sheet Divider (Knife Card)	Cardboard Partition
Durability & reuse	Designed for repeated returnable logistics cycles	Prone to tearing and slot deformation after a few uses
Moisture & oil resistance	Waterproof and resistant to common workshop moisture	Weakens and warps in humid or oily environments
Cleanability & dust	Low fiber shedding; easy to wipe or wash	Generates paper dust and fibers during friction
Customization options	Die-cut slots, finger cutouts, edge sealing, fabric lamination, ESD options	Limited to basic slotted paperboard

Quotation Checklist

To request an accurate quotation for custom corrugated plastic dividers, please send your box internal dimensions (L × W × H), part dimensions and weight, required cell count (rows × columns), divider height, sheet thickness preference, color, material or surface requirement (standard PP, soft laminated or ESD option), order quantity, and whether you need dividers only or complete corrugated plastic boxes with dividers.

Short FAQ

Can I order custom divider inserts for my existing plastic totes or cartons?

Yes. Jinmai can manufacture standalone divider sets to fit your existing injection-molded totes, Euro containers, corrugated plastic boxes or export cartons. Provide the exact internal length, width and usable height of your container along with the required cell layout.

How do I prevent tight or loose fit when specifying interlocking dividers?

Provide both the maximum part dimensions and the internal bottom dimensions of the container, and let us know how operators load and unload the parts. Leaving proper clearance per cell and matching slot width to the sheet thickness prevents grid bowing and part jamming.

Can dividers be shipped flat to save export freight volume?

Yes. Custom knife card dividers can be shipped pre-assembled for immediate production-line use or packed flat in sets to reduce ocean or air freight volume, depending on your warehouse labor and shipping preferences.

Why choose Jinmai for custom corrugated plastic dividers and knife cards?

Internal partitions determine whether parts arrive scratch-free and how fast operators can pack and unpack on the line. Jinmai supports buyers from cell-layout sizing to die-cut production and matched box supply.

Custom slot & cell engineering: We match slot width, sheet thickness and cell clearance to your actual part geometry and container internal dimensions.
Multiple structure options: Interlocking cross-slot grids, parallel partitions with U-shaped finger cutouts, multi-layer pads and soft-laminated surfaces can be tailored to your parts.
Standalone inserts or complete box sets: Order divider inserts alone for your existing totes, or pair them with Jinmai's custom corrugated plastic boxes and ESD divider boxes.
Guangdong manufacturing & export support: Located in Zhongshan, Guangdong, we support sample verification before mass tooling and flexible flat or assembled export packing.

Q: What is the difference between interlocking knife card dividers and parallel partitions?

A: Interlocking knife card dividers use slotted longitudinal and transverse strips that lock together into rectangular cells, ideal for separating multiple parts per layer. Parallel partitions use slotted side walls or guides to hold flat or elongated parts such as circuit boards or panels in parallel rows.

Q: How is divider thickness selected?

A: Divider thickness is selected according to part weight, cell span and container size. Heavier metal or automotive parts may use thicker sheets or reinforced structures.

Q: Can you add soft fabric or fleece on the divider surface?

A: Yes. For painted, plated or scratch-sensitive components, PP hollow sheet dividers can be laminated with non-woven fabric, flannel or EVA foam on contact surfaces according to your sample or drawing.

Q: Can you make anti-static or conductive ESD dividers?

A: Yes. When static protection is required for PCB assemblies or electronic modules, dividers can be fabricated from anti-static or conductive PP hollow sheet, or supplied as a complete ESD safe divider box.

Flat or assembled packing: Divider sets can be bundled flat by set or pre-assembled into grids according to your freight volume and line-side handling preference.
Matched box packing: When ordered together with corrugated plastic boxes, dividers can be packed inside the boxes or palletized separately.
Sample confirmation: Physical samples can be produced to verify cell clearance, container fit and material stiffness before bulk production.
Export shipping: Protected with stretch film, export cartons or pallets for sea freight, air freight or express delivery.