[ Selection Data ]

Specifications & Certifications

Pore size, temperature ceiling and chemical tolerance for every sintering platform we run, plus the audited certificates behind them.

Material Selection Table

Pore range 0.5 - 120 um
MaterialPore rangeMax tempChemical toleranceTypical applications
Sintered UHMWPEUltra-High Molecular Weight Polyethylene5 - 120 um80 CBroad; weak to strong oxidisersBiocompatibleLow extractablesSelf-sealing gradesMedical devices, IVD, self-sealing vents, life scienceView
Sintered PEPolyethylene10 - 120 um70 CBroadLowest cost polymerEasy to mouldHydrophobic optionOxygen concentrators, HPLC inlets, general ventingView
Sintered PPPolypropylene5 - 100 um100 CStrong acid and alkali resistantAcid resistantHigher temp than PEFDA gradesBattery venting, chemical processing, water treatmentView
Sintered 316L Stainless316L Stainless Steel Powder0.5 - 100 umOver 400 CBroad; not for chloride-rich mediaSteam sterilisableBackflushableHigh pressureSteam filtration, decarbonisation, catalyst recoveryView
Sintered BronzeBronze Powder10 - 100 um200 CModerateBest acoustic dampingCleanable and reusablePneumatic silencers, high-pressure gas bufferingView
Scroll table horizontally

Ranges shown are standard production bands. Tighter distributions and custom geometry are available on request - send your operating conditions and we will confirm feasibility.

Choosing a Pore Band

0.5 - 1 um
Retention
Sub-micron particulate
Flow
Restricted
Typical duty
Fine liquid polishing, sterile-grade prefiltration
1 - 10 um
Retention
Fine particulate
Flow
Moderate
Typical duty
Chemical transfer, analytical inlet filtration
10 - 40 um
Retention
General particulate
Flow
Good
Typical duty
Venting, aeration, most OEM device duties
40 - 120 um
Retention
Coarse particulate
Flow
Free
Typical duty
Bulk venting, silencing, powder retention
[ Audited Credentials ]

Certifications

Certificates issued to the group and independently verified on our Alibaba.com storefront. Click any certificate to view the full document.

ISO 9001:2015

Quality Management System Certification

Verified
Certificate no.
28724Q00707R0S
Issued by
Zhongzheng Excellent Certification Group Co., Ltd.
Valid from
2024-11-25
Valid until
2027-11-24
Scope

Production of disposable humidifying nasal oxygen cannula, wall mounted oxygen inhaler, dual-purpose flowmeters, powder sintered filters, polymer microporous filters, medical metal accessories, medical rubber and plastic accessories.

Issued to Zhejiang Wenhao Medical Technology Co., Ltd.

RoHS

Restriction of Hazardous Substances - Test Report

Verified
Certificate no.
STD-250715-A006-1
Issued by
STD (Standard Group)
Valid from
2025-07-21
Valid until
2026-11-11
Scope

Restriction of lead, mercury, cadmium, hexavalent chromium and brominated flame retardants in accordance with the EU RoHS directive.

Issued to Taizhou Jinwenhao Trading Co., Ltd.

Audited Facility

Factory area5,828 m2
Total staff48
QA / QC inspectors10
Years exporting9
On-time delivery100%
Avg. response timeWithin 1 hour

Facility figures verified by SGS during an on-site audit in April 2025 as part of our Alibaba.com Verified Supplier assessment.

Need a specification we have not listed?

Tighter pore distributions, custom geometry, specific certifications for your market - tell us the requirement and we will confirm what is achievable before you commit to tooling.