Multi-component fibres
A multi-component fiber and fiber technology, applied in the direction of fiber chemical characteristics, heating equipment for treatment, cooling equipment for treatment, etc., can solve the problems of not very effective, low latent heat value, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0123] Preparation of polymer-wax mixture
[0124] The polymer particles / powder and wax are melted together in a heated oven with slow stirring. The oven was heated to about 180°C. During heating, the polymer particles gradually melt and the wax begins to enter the particles which gradually swell in size. After a period of time (5-30 minutes, depending on polymer type, polymer particle size and batch size), the swollen polymer particles coalesce into a viscous melt. The polymer-wax mixture was then cooled to room temperature. To further ensure a homogeneous mixture of wax and polymer, the solid mixture was placed in a heated Brabender kneader (180° C.) and melt homogenized at 50 rpm for 5 minutes. After melt homogenization in a Brabender kneader, the material was left to cool and then the solid material was ground into particles of approximately 2-4 mm in size. The first material can be produced and then stored prior to producing the multicomponent fibers. Therefore, all ...
Embodiment 1
[0149] Various amounts of viscosity modifier in the form of polyethylene material (high density polyethylene) and RT 27 (hydrocarbon wax manufactured and supplied by Rubitherm GmbH, Germany, see Table 2) were mixed. The melt flow rate of the polyethylene material is determined by the method disclosed under "Melt Flow Rate". The mixing of viscosity modifier and polyethylene was then carried out according to the method disclosed under "Preparation of Polymer-Wax Mixture". The viscosity of the different mixtures was then investigated according to the method of "Rheological Evaluation". An angular frequency of 10rad / s was chosen for comparison to roughly correspond to Figure 6 Wall shear rates in a cylindrical pipe with a diameter of 2.5 mm are shown.
[0150] The results are shown in the graph of Table 8, which shows the magnitude of the complex viscosity at 190°C and 10 rad / s versus the weight percent of RT 27. It can be seen that the lower the melt flow rate of polyethylene...
Embodiment 2
[0155] Table 3 discloses the PCM efficiency of PCM-containing polymers with respect to their latent heat (heat of fusion / crystallization). The PCM-containing polymer should correspond to the first material in the multicomponent fiber. Hydrocarbon wax RT 31 mixed with different polyolefins and prepared according to the method disclosed under "Preparation of polymer-wax mixtures", the heat of fusion in the range 0-50 °C is measured by means of DSC according to the DSC analysis disclosed above .
[0156] table 3
[0157]
[0158] a Obtained / provided by Borealis
[0159] b Obtained / provided by Equate
[0160] c Acquired / provided by DuPont
[0161] d Obtained / provided by Rubitherm
[0162] e g / 10 min, measured at 190°C according to ISO 1133, weighing 21.6 kg
[0163] f g / 10 min, measured at 190°C according to ISO 1133, weighing 2.16 kg
[0164] g g / 10 min, measured at 230°C according to ISO 1133, weighing 2.16 kg
[0165] h Applicant not measured, estimated leve...
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| latent heat | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More