A pipe has multiple cavities. How can we ensure that the cavities do not "interact" with each other? 

ThePTFE multi-chamber tube is a precision pipe materialized through the combination of polytetrafluoroethylene material properties and the multi-channel integrated molding process. Its interior can be divided into multiple independent chambers, enabling simultaneous transmission of multiple media, cable storage, or functional zoning within a single tube. In scenarios such as medical interventional catheters and industrial precise fluid transmission, the independence and dimensional accuracy between the chambers directly determine the product performance. Below, from the production perspective, we will introduce how we control these two key aspects. 

1. One-piece molding: How to ensure that the cavities do not "interconnect" with each other? 

The core value of PTFE multi-chamber tubes lies in "multi-chamber integration", but this is only possible if each chamber is strictly isolated from one another and does not interconnect. 

Mold accuracy is fundamental: The molding of multi-chamber tubes requires highly precise分流 molds to ensure that the molten PTFE is evenly distributed to each chamber channel during extrusion. If the mold flow channels are poorly designed or the processing accuracy is insufficient， it may result in uneven wall thickness of each chamber， or even贯通 (i.e.， "cavity connection") at the weak points between adjacent chambers. Our mold workshop is equipped with precise processing equipment to ensure the accuracy of chamber分流 from the very beginning. 

Stability of extrusion process: The sintering and extrusion processes of PTFE are highly sensitive to fluctuations in temperature and pressure. Even a slight fluctuation in pressure or temperature can cause deviations in the wall thickness between different cavities, and in severe cases, may lead to cavity deformation or intercommunication. During the production process, we continuously track key parameters through an online monitoring system to ensure the long-term stability of the process. 

Wall thickness uniformity inspection: For each batch of products, a sample will be taken for cross-sectional microscopic analysis to precisely measure the wall thickness and cavity spacing of each cavity, ensuring that the wall thickness is uniform, the separation is reliable, and it meets the dimensional tolerance requirements specified in the design. 

II. Full-process Inspection and Quality Traceability 

As a key component used in medical or precision industries, the inspection of PTFE multi-chamber tubes cannot rely solely on final inspection. A complete quality control system throughout the entire process is even more crucial. 

Material and mold verification: The batch stability of PTFE material directly affects extrusion molding. We conduct critical indicator sampling for each incoming batch to ensure consistency between batches. For new molds or those after major repairs, strict mold testing is required to confirm that the cavity dimensions and distribution are qualified before they are put into mass production. 

Process monitoring and product inspection: During the production process, operators conduct regular sampling for appearance checks and size measurements. Before the products are shipped out, a comprehensive size inspection and pressure resistance test are carried out on each batch to ensure that there is no leakage or deformation in each cavity under the rated pressure. 

Batch traceability: Each batch of PTFE multi-chamber tube has an independent batch number. All information from raw materials, molds, process parameters to test results is recorded, facilitating quality traceability. Jiangsu Mingfu New Materials Technology Co., Ltd. has obtained ISO9001 and ISO13485 medical device quality management system certifications, ensuring the safety and stability of the products throughout the entire process. 

Summary and Selection Suggestions 

When purchasing PTFE multi-chamber tubes, the following steps are recommended for confirmation: 

Specify usage and size requirements: Provide key size specifications such as the bore diameters, wall thicknesses, center distances, etc., as well as the pressure resistance level and operating temperature. 

Evaluate the supplier's mold and testing capabilities: Determine whether the supplier has the ability to produce high-precision molds and conduct microscopic section testing. This directly affects the independence of the cavity and the dimensional accuracy. 

Conduct cross-sectional testing: Before the batch production, request samples. Conduct cross-sectional microscopic analysis either by yourself or through a third party to verify the uniformity of the cavity wall thickness and the reliability of the separation. 

Jiangsu Mingfu New Materials Technology Co., Ltd. specializes in the field of fluorine material extrusion tubes. It has obtained ISO9001 and ISO13485 certifications for medical device quality management systems. The company offers precision tubes such as PTFE multi-chamber tubes, FEP heat shrink tubes, and Pebax tubes. Please feel free to communicate your specific requirements and request sample tests. 

Official website: http://www.minfluo.com 

Su Sidedong 

0510-81814868 

0515-8272699 

0515-8259666 

Email:

Alan.su@minfluo.com

Address:

No. 30, Chunhui Road, Hedie Town, Shaoyang County, Jiangsu Province