Melamine (Type III) Plastic Abrasive Grit

MELAMINE PLASTIC BLAST MEDIA FOR DELICATE CLEANING, DEBURRING AND SURFACE PROTECTION

Melamine Plastic Blast Media is a synthetic plastic abrasive designed for applications that require a high strip rate while helping protect the underlying substrate. Melamine (Type III) is the hardest plastic media in the Kramer Industries plastic abrasive range and is suited to more demanding coating removal and cleaning applications.

Melamine Plastic Abrasive Grit provides aggressive cutting action compared with softer plastic media. Its controlled impact makes it useful for removing difficult coatings, paint, carbon, and process residues without the same level of substrate alteration that can occur with harder mineral abrasives.

Melamine Blasting Media can be used on multiple substrates, including selected metals, molds, tooling, aircraft components, fiberglass, and electronic components. The appropriate grade, pressure, nozzle, and blasting technique should be selected according to the material and coating.

What Type of Plastic Is Melamine?

Melamine plastic is a thermosetting plastic material made using melamine resin. In abrasive blasting, melamine is formulated into angular plastic particles that provide stronger cutting action than softer plastic media.

When considering what type of plastic is melamine, it is useful to distinguish the resin from the finished abrasive. Kramer Industries identifies Melamine (Type III) as having a MOHS hardness of 4.0 and Barcol hardness of 64-74 in its plastic abrasive specifications.

Is Melamine a Type of Plastic?

Yes, melamine is used as a type of thermosetting plastic resin. For blasting applications, it is processed into plastic abrasive particles. Melamine plastic is therefore different from common consumer plastics and is engineered for controlled industrial cleaning and coating removal.

When asking is melamine a type of plastic, the answer depends on the context: melamine resin is a thermosetting material, while melamine blasting media is the engineered abrasive form used for surface preparation.

Melamine Plastic for Coating Removal

Melamine Plastic Blast Media is designed for stripping difficult coatings and contaminants from selected substrates. It can remove paint, primer, carbon, hydrocarbon deposits, and other residues while providing a controlled blasting process.

Melamine blasting media is particularly useful for molds, tooling, aircraft engine components, automotive parts, steel, iron, and other durable substrates where stronger plastic-media cutting action is needed. The media can also be used where mineral abrasives may be unnecessarily aggressive. Type III Melamine is specifically positioned as a more aggressive plastic media option for tougher coatings and contaminants.

Mold and Tooling Cleaning

Melamine Plastic Abrasive Grit can be used to clean molds, dies, and tooling affected by release agents, carbon, coatings, and process residues. Its angular particles provide effective cleaning while helping maintain important surface details.

For production tooling, Melamine Blasting Media can support repeatable cleaning between production cycles. The selected particle size and operating pressure should be matched to the tooling material and contamination.

Aircraft, Automotive, and Industrial Applications

Melamine plastic can be used for selected aircraft engine components, aircraft parts, automotive bodies, wheels, tanks, gears, and other industrial components. Its stronger cutting action makes it appropriate when softer plastic media may not provide the required strip rate.

Kramer Industries supplies Melamine Plastic Abrasive Grit for applications where coating removal speed needs to be balanced with substrate protection. Melamine Plastic Blast Media can also be considered for selected fiberglass, soft-metal, and composite applications when the process is properly tested.

Selecting Melamine Blast Media

The appropriate melamine grade depends on the substrate, coating thickness, particle size, blasting pressure, nozzle configuration, and required surface condition. Testing a representative area before full production can help establish suitable operating conditions.

A melamine blast media selection should focus on achieving the required strip rate without unnecessary substrate erosion. Melamine plastic is generally selected when stronger cutting action is needed than softer plastic media can provide.

Equipment and Blasting Conditions

Melamine Blasting Media can be used in compatible pressure blasting equipment. Air pressure, nozzle size, blasting distance, media flow, angle, and exposure time all affect the final result.

Melamine Plastic Abrasive Grit should be used with operating conditions appropriate to the substrate and coating. Controlling these variables helps maintain consistent stripping performance and reduces unnecessary media consumption.

Reusability and Media Life

Melamine plastic can be reused when the particles remain suitable for the application. Actual media life depends on blasting pressure, coating type, substrate, recovery method, contamination, and particle breakdown.

Kramer Industries recommends evaluating the condition of the media during operation rather than assuming a fixed number of reuse cycles. Reusing suitable plastic abrasive can reduce media consumption and support a more consistent process.

Melamine Compared With Other Plastic Media

Melamine is harder and more aggressive than softer plastic media such as acrylic. It can therefore be selected when a higher strip rate is required. Acrylic may be more appropriate for ultra-sensitive surfaces, while melamine can be considered for tougher coatings and more durable substrates.

The choice should be based on the substrate, coating, required removal rate, acceptable surface change, and equipment. Melamine Plastic Blast Media is not automatically the right choice for every application; the media should match the process requirements.

Specifications

Melamine (Type III) Plastic Abrasive Grit Specifications
Mesh Size	Average Particle Size the smaller the mesh number, the coarser the grit	Spec Sheet
8-12 Mesh	2.36-1.70 mm
12-16 Mesh	1.70-1.20 mm
16-20 Mesh	0.85-1.20 mm
20-30 Mesh	0.56-0.85 mm
20-40 Mesh	0.42-0.85 mm
30-40 Mesh	0.42-0.56 mm
40-60 Mesh	0.25-0.42 mm
60-80 Mesh	0.16-0.25 mm