Silicone tubing formulations and methods for making same

A technology of silicone and silicone polymer, which is applied in the direction of thin material processing, tubular objects, and other household appliances, and can solve problems such as short life

Inactive Publication Date: 2012-05-23
SAINT GOBAIN PERFORMANCE PLASTICS CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, silicone rubber has a shorter life as a peristaltic pump hose

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicone tubing formulations and methods for making same
  • Silicone tubing formulations and methods for making same
  • Silicone tubing formulations and methods for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Low molecular weight polar silicone fluids were tested as migratory additives in high consistency rubber (HCR) compound-based silicones. In this example, 5.0% by weight of 500 centipoise (cp) polyphenylmethylsiloxane (PMM-0025, obtained from Gilest Corporation) was added to a platinum-catalyzed HCR gum in an open mill. In base silicone. The resulting material was extruded into peristaltic pump tubing (0.250 inches x 0.380 inches). The pump hose was then post cured for about 1 hour in a box oven at about 177°C for about 2 hours.

[0032] In the peristaltic pump test, the tubing was evaluated using a MasterFlex pump drive (Cole Parmer) with a standard Master Flex 17 pump head designed for a tubing size of 0.250" x 0.0380". Install the hose in the pump head using the standard method proposed for Cole Parmer pumps. The tube performance was tested using water as the pump medium using a pump head speed of 600 rpm until the tube ruptured. Burst is defined as the time requi...

Embodiment 2

[0038] In this example, 0.5% by weight, 500 centipoise polyphenylmethylsiloxane (PMM-0025, obtained from Gilest Corporation) was added to platinum-catalyzed HCR-based silica in an open mill. in ketones. The resulting material was extruded into a peristaltic pump hose (0.250" x 0.380") at 40 ft / min on a Davis-Standard extruder. The product was cured in a 3 foot HAV IR oven at approximately 900-1200°F with a dwell time of approximately 4.5 seconds. The hose was post cured at about 177°C for about 2 hours and the hose was evaluated by a peristaltic pump test.

[0039] figure 2 Shown is the effect of polyphenylmethylsiloxane addition on platinum catalyzed HCR silicone lifetime. On average, the lifetime of the tubes was increased by about 100%.

[0040] image 3 and Figure 4 The effect of polyphenylmethylsiloxane addition on flow rate consistency and target flow rate values ​​is shown. In general, the addition of migratory components can increase the flow rate in the hose ...

Embodiment 3

[0043] A low molecular weight polar silicone fluid was tested as a mobility additive in a 50 durometer silicone rubber base. Specifically, the silicone rubber is a platinum catalyzed high consistency rubber (HCR) silicone. In this example, approximately 5.0% by weight of 500 centipoise (cp) polyphenylmethylsiloxane (PMM-0025, obtained from Gilest Corporation) was added to a platinum-catalyzed HCR rubber based silicone. The resulting material was extruded into peristaltic pump tubing (0.250" x 0.380"). The tube was then post cured for about 1 hour, about 2 hours in a box oven at about 177°C.

[0044] The materials were evaluated in unpost-cured form, post-cured form and after sterilization. Sterilization using the 60 Irradiation of γ-rays from a Co source is performed with a minimum dose of 50 kGy. The mechanical properties of the samples, such as tensile strength, flexural modulus and elongation at break, were tested on an Instron. The test procedure is in accordance wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The disclosure is directed to a flex endurant tube including a blend of a silicone polymeric matrix material and a migrating component. The disclosure is further directed to methods for making the aforementioned tube.

Description

technical field [0001] The present invention generally relates to silicone formulations for flex tubing and methods of making the flex tubing. Background technique [0002] Peristaltic pumps are increasingly used to move various substances. Its applications range from biopharmaceutical to medical fields to food processing. Essentially, a peristaltic pump moves a variety of materials, usually liquids, through tubing through a series of rollers and a fixed pump housing. Therefore, the tubes used in peristaltic pumps are flexible and resilient. [0003] Silicone rubber is a typical material used for peristaltic pump tubing due to its inherent flexibility. Unfortunately, silicone rubber has poor tear strength and poor toughness. Silicone rubber has a tendency to crack and burst after repeated flexing. Therefore, silicone rubber has a short life as a peristaltic pump hose. Silicone rubber can be modified with various additives in order to increase the lifetime of silicone r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04B29D23/00C08K5/00
CPCC08G77/70C08L83/04C08K5/0016C08G77/18C08K5/5419C08G77/24Y10T428/1352C08L83/00
Inventor M·W·西蒙W·J·德吕蒙
Owner SAINT GOBAIN PERFORMANCE PLASTICS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap