Melt processable thermoplastic polymer composition
A melt processing, polymer technology, applied in the field of melt processable thermoplastic polymer composition, can solve the problems of high back pressure, weak cell wall, affecting film orientation, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0073] Resin A, a syndiotactic polystyrene (Questra MA406 from Dow Chemical Company), was extruded at a target melt temperature of 300°C.
[0074] Table 3 below shows the measured viscosities of resins with and without additives. The addition amount of auxiliary agent is 1000ppm. In each case, the first shear rate at which melt fracture is observed (melt fracture occurs) is indicated. The shear rate of melt fracture onset of resin without additives was about 100 / sec, while the shear rate of melt fracture of resins with all additives was greater than 1000 / sec.
[0075] Table 4 summarizes the performance of PPA. The addition of PPA to Resin A delayed the onset of melt fracture, resulting in higher shear rates and lower pressures.
[0076] Resin A Baseline
[0077] * Melt fracture starts
[0078] sample
[0079] *Interpolated value
Embodiment 2
[0081] Resin C, polyamide 6,6 (Celanese 1100), was extruded at a target melt temperature of 300°C. Additives are added via concentrate to a final concentration of 1000ppm. For extrusion of nylon, replace CaCO with a purge compound containing silica (Polybatch KC-15, A. Schulman) 3 Masterbatch. Two experiments were repeated, one with CaCO 3 The masterbatch washes the extruder and the second washes the extruder with the silica masterbatch.
[0082] Table 5 gives the shear stress versus shear rate for the base resin and the PPA-containing resin. Samples of PPA-5 were tested in duplicate. In each case, lower shear stress was observed with PPA. Shear stress was interpolated at a fixed shear rate of 600 / sec for comparison. This is shown in Table 6 together with the calculated pressure drop achieved due to PPA. Table 5 clearly shows the benefits provided by PPA. Among them, the multi-peak sample (PPA-5) has better performance than the single-peak sample (PPA-3).
[0083] ...
Embodiment 4
[0088] Resin D, polyethylene terephthalate (Eastapak 9663 from Eastman) was extruded at a target melt temperature of 305°C.
[0089] Table 8 shows the shear stress versus shear rate for the resin and the resin containing PPA. It can be clearly seen that the stress decreases at higher shear rates. Here, lower Mw (ie higher MFI) provides better performance. This shows that the PPA is preferably matched to the resin used. Table 9 summarizes the pressure drop achieved for Resin D.
[0090] resin
[0091] sample
[0092] *Interpolated value
PUM
Property | Measurement | Unit |
---|---|---|
aspect ratio | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com