TPX DX231 – Transparent Heat-Resistant PMP Resin by Mitsui Chemicals

TPX DX231 is a transparent polymethylpentene (PMP) copolymer resin manufactured by Mitsui Chemicals, Inc. – the world‘s sole producer of TPX brand PMP resins. As an authorized distributor and trader, we supply genuine material with full traceability and direct access to official Mitsui Chemicals technical documentation. For more product options and company information, please visit our website at https://szrqchem.com/.

TPX is a crystalline polyolefin made from 4-methylpentene-1, produced by Mitsui Chemicals’ special technology of molecular design and catalyst. TPX DX231 is a high modulus polymethylpentene that offers an exceptional combination of properties:

• Excellent transparency equivalent to glass and acrylic

• Superior releasability – one of the lightest polymer materials among thermoplastics

• High modulus with excellent chemical, heat & steam resistance

• High durability against acid, alkali and alcohol

• Low refractive index and low dielectric properties

• High gas permeability

TPX DX231 is recommended for extrusion coating and is also applicable for injection molding and extrusion processing by fiber spinning.

The material is certified for food packaging materials by Japan Hygienic Olefin and Styrene Plastics Association (JHOSPA) , United States Code of Federal Regulations Title 21 (FDA) and EU Regulation (EU) 10/2011.

Key Features of TPX DX231

• High Modulus / Rigidity – High modulus PMP with tensile modulus of 1,862 MPa and flexural modulus of 1,551 MPa

• Lowest Specific Gravity Among Plastics – Density of only 0.833 g/cm³ – one of the lightest polymer materials among thermoplastics

• Superior Optical Clarity – Light transmittance of 93%; refractive index of 1.46

• High Heat Resistance – Vicat softening point of 180°C; DTUL @ 66 psi of 126°C

• Excellent Release Properties – Superior releasability; low surface tension prevents sticking and contamination

• Excellent Chemical & Steam Resistance – High durability against acid, alkali and alcohol

• Excellent Electrical Properties – Volume resistivity >10¹⁶ Ω·cm; dielectric strength of 66 kV/mm

• High Gas Permeability – Exhibits high gas permeability

• Low Refractive Index – Refractive index of 1.46

• FDA Compliant – Certified for food contact applications per FDA 21 CFR

• Versatile Processing – Suitable for extrusion coating, injection molding, and fiber spinning

• UL 94 HB – UL 94 flammability rating of HB

Typical Applications for TPX DX231

Typical Properties

Important Notes on Typical Data:

• Values listed are typical and sourced from Mitsui Chemicals official data sheets. They do not constitute binding product specification.

• Batch-to-batch deviations may exist. For critical applications, validate performance with batch-specific COA certificate.

• Final performance depends on processing conditions, mold design, and part geometry.

• Mitsui Chemicals official TDS shall serve as definitive technical reference. Request the latest official TDS from our sales team.

Processing Guidelines

Critical Processing Warnings:

• Drying: TPX DX231 is not hygroscopic and typically does not require drying. If moisture is a concern, dry at 80-100°C for 2-3 hours.

• Recommended Processing: DX231 is highly recommended for extrusion coating and is also applicable for injection molding and fiber spinning.

• Gate Design: Pin gate is the most suitable for TPX molds due to excellent flowability. Avoid large gates that can cause residual stress and gate cracks.

• Cooling: Sufficient and well-balanced cooling channels are essential due to TPX‘s crystalline nature and larger shrinkage compared to amorphous polymers.

• Surface Finish: Highly polished mold surface is recommended for excellent transparency.

• Shrinkage: Mold design should account for higher shrinkage. Off-center gates are recommended to prevent warpage.

• Regrind: Regrind can be used up to 20-30% with virgin material, provided it is clean and properly dried.

Related Products

• Explore TPX Transparent Resins – Browse all TPX resin options

• Explore Engineering Plastics – Browse all engineering plastic materials

• About Our Company – Learn more about our supply capabilities and quality assurance

Technical Documents

Request any document above by:

• Email: ruiqingchem@gmail.com

• Online form: Our contact page

We reply within one working business day. Please clearly state product (TPX DX231) and document type you require.

FAQ

Q1: What is TPX DX231 and what is it used for?
A: TPX DX231 is a high modulus, transparent polymethylpentene (PMP) resin manufactured by Mitsui Chemicals. It combines excellent transparency equivalent to glass and acrylic, superior releasability, and is one of the lightest polymer materials among thermoplastics. It is widely used in release films for FPC, LED molds, rubber hose mandrels, food containers, medical devices, and extrusion coating applications.

Q2: What is the difference between TPX DX231 and TPX DX845?
A: TPX DX231 has a much higher MFR (100 g/10min vs 9 g/10min at 260°C, 5kg), indicating significantly lower molecular weight and better flowability. DX231 is specifically recommended for extrusion coating and fiber spinning, while DX845 is better suited for T-Die casting extrusion and injection molding applications requiring higher modulus.

Q3: Is TPX DX231 FDA compliant?
A: Yes. TPX DX231 is certified for food packaging materials by United States Code of Federal Regulations Title 21 (FDA), Japan Hygienic Olefin and Styrene Plastics Association (JHOSPA), and EU Regulation (EU) 10/2011.

Q4: What is the density of TPX DX231?
A: The density is 0.833 g/cm³ (832 kg/m³), making it one of the lightest polymer materials among thermoplastics.

Q5: What is the light transmittance of TPX DX231?
A: The light transmittance is 93% with haze of 2.1%.

Q6: What processing methods can be used for TPX DX231?
A: DX231 is highly recommended for extrusion coating and is also applicable for injection molding and extrusion processing by fiber spinning.

Q7: What is the MFR of TPX DX231?
A: The Melt Flow Rate is 100 g/10min at 260°C, 5kg.

Q8: What are the key advantages of TPX DX231?
A: Key advantages include high modulus (tensile modulus 1,862 MPa), low density (0.833 g/cm³), high transparency (93%), superior releasability, excellent chemical & steam resistance, FDA compliance, and high gas permeability.

Q9: What is the lead time for orders?
A: Regular orders ship within 7-10 working days after payment confirmation. Large-volume or urgent orders can be negotiated separately.

CTA (Call to Action)

Ready to order TPX DX231?

To get a precise quotation and professional technical support, please share:

• Required quantity (kg)

• Destination port or delivery address

• Target application (release films, LED molds, rubber hoses, food containers, extrusion coating, etc.)

• Processing method (extrusion coating, injection molding, fiber spinning, etc.)

• Document requirement (TDS, SDS, FDA compliance, COA, etc.)

Sample Policy:

• Samples are for laboratory validation tests only, not for production use.

• Buyer bears international sample-shipping freight.

• If bulk-product performance deviates from sample reference, Mitsui Chemicals official TDS serves as the authoritative benchmark.

Take action now:

• 📧 Email Us – ruiqingchem@gmail.com

• 📝 Send Inquiry – Use our quick inquiry form

• 💬 Live Chat – Click the bottom-right chat widget to speak directly with our team

After-Sales Support

Disclaimer

DISCLAIMER: All technical data is referenced from original Mitsui Chemicals typical values for TPX DX231. Our company acts as authorized distributor/trader rather than original manufacturer. Final performance depends on processing conditions, mold design, and part geometry. Buyers shall independently validate product suitability for individual applications. Our firm bears no liability for product failure caused by improper processing or improper usage. Always reference the latest Mitsui Chemicals official TDS of TPX DX231 as the definitive specification.