ZH-TW
The Thesvin dust bag with reversible paper cap is a multi-layer PP meltblown filter bag designed to drop into the auto-empty base of robot vacuums and the bin of handheld vacuums. It captures fine dust (PM2.5), dust mites, pollen and hair, and its paper cap seals the bag when you pull it out. It is made for OEMs and brand owners who need a bag that fits their dock or bin and their customers' idea of clean.
Fitment comes before filtration. The bag's outline, spout and cap are built around the host device: the cardboard collar seats into the dock's intake, the bag body sits in the collection chamber, and the reversible paper cap slides over the opening. When you pull the bag out, the cap closes the inlet and keeps dust inside — no cloud, no contact.
Because the collar and cap are the interface, we customise them first. You can specify a rigid cardboard collar or an injection-moulded plastic collar, and choose a sliding auto-seal cap or a reversible paper cap. Bags are made 100% to your device dimensions, so the bag locks in place and seals against the dock gasket without adapters. For handheld vacuums and commercial vacuum bins, the same approach applies: match the inlet geometry, then set bag volume and airflow.
The filter medium is a multi-layer composite of polypropylene nonwoven and meltblown layers, with an optional antibacterial filter cotton layer. The structure blocks fine particulate matter (PM2.5), dust mites, pollen, hair and other common household allergens, so exhaust air from the dock does not reintroduce what was just collected.
High porosity keeps resistance low. The bag holds a large dust load while maintaining airflow, so the motor does not have to work harder as the bag fills. That matters on auto-empty docks, where a clogged bag can reduce pickup. An optional activated-carbon layer is available for odour control.
| Item | Detail |
|---|---|
| Product name | Vacuum cleaner dust bag (handheld vacuum / robot vacuum auto-empty bag) |
| Core media | Multi-layer high-precision composite PP (polypropylene nonwoven + meltblown) / antibacterial filter cotton |
| Filtration function | High-precision interception of fine dust (PM2.5), dust mites, pollen, hair and other household allergens; prevents secondary exhaust pollution |
| Physical / fluid properties | High-porosity breathable design, very low operating airflow resistance, high dust-holding capacity, does not sap motor suction |
| Main applications | Robot vacuum auto-empty docks, handheld cordless vacuums, commercial vacuum bins |
| Size and collar customisation | 100% customised to device dimensions; rigid cardboard collar or eco-friendly injection-moulded plastic collar; sliding auto-seal and activated-carbon odour-control versions available |
| Company systems | 50,000 m² modern clean production plant and a national-level CNAS testing centre; ISO 9001, ISO 14001 and IATF 16949 quality management systems |
Thesvin holds IATF 16949 (achieved in 2024), ISO 9001, ISO 14001 and ISO 45001. Dimensional consistency is controlled at three points: incoming inspection (IQC) checks media and board, in-process inspection (IPQC) checks collar seating and cap operation, and outgoing inspection (OQC) checks bag dimensions and seal function before packing. Our own laboratory is CNAS-accredited and can issue test reports on filtration efficiency, dust-holding capacity and resistance.
Production runs in a 50,000 m² facility, including six clean workshops totalling 20,000 m². Multiple automated lines support monthly output in the millions of pieces. Products meet REACH and RoHS requirements, and compliance documents are available. With more than 20 years of filter development and manufacturing, we have built over 1,000 filtration solutions for customers exporting to Europe, the US, Japan and Korea. We are located in Zhongshan, Guangdong, China.
To get a quote, send us: your device or vehicle model (robot vacuum dock, handheld vacuum or commercial bin); a size drawing or an old bag; the airflow or water flow of the host unit; operating conditions such as dust type and temperature; and your estimated quantity. If you do not have a drawing, an old part is enough — we measure it and confirm the interface. Contact our team and we will reply with fitment questions and a sample plan.
Fitment depends on the collar and cap matching your dock or bin. Thesvin makes each bag 100% to device dimensions, with a rigid cardboard or injection-moulded plastic collar. Send your device model or an old bag and we will confirm the interface before quoting.
Yes. An old bag and dock are enough for us to measure the collar, cap and bag outline. We confirm dimensions and cap operation against your sample, then produce a fit sample for your approval.
The multi-layer PP meltblown composite captures fine dust (PM2.5), dust mites, pollen and hair, and prevents secondary exhaust pollution. Efficiency, dust-holding capacity and resistance are tested in our CNAS-accredited laboratory, and reports can be issued for your evaluation.
Yes. We customise size, collar type (cardboard or plastic), cap style (sliding auto-seal or reversible paper), media grade and optional activated-carbon odour control. Logo and packaging customisation are also available under OEM/ODM.
Send your device model, a size drawing or an old part, the airflow of the host unit, operating conditions and estimated quantity. We will reply with fitment questions, a sample plan and a quote. Contact us through the inquiry form to start.
MOQ and lead time depend on the specification and order volume. Share your target quantity and customisation needs, and we will confirm the minimum order and schedule in the quotation based on our production capacity.
Replace the bag when it reaches its fill line or when dock suction drops noticeably. The high-porosity, high-capacity design maintains airflow as it fills, but a full bag should be changed to protect motor performance. The reversible paper cap seals the bag during removal.
Yes. The reversible paper cap slides over the inlet when you pull the bag out, closing it so dust stays inside. This keeps the change clean and avoids secondary dust clouds. The cap is available as a sliding auto-seal or reversible paper design.
