摘要:
The present invention has its object provision of polylactic acid resin expanded beads having a controlled crystalline state and exhibiting excellent fusion bonding at the time of in-mold molding. The expanded beads have such a crystal structure that gives a first time DSC curve when heated according to heat flux differential scanning calorimetry referenced in JIS K7122(1987) and a second time DSC curve when thereafter cooled and then again heated, the second time DSC curve having a fusion peak having a reference peak temperature and the first time DSC curve having a fusion peak with a peak temperature that is on a higher temperature side than the reference peak temperature and another fusion peak with a peak temperature that is on a lower temperature side than the reference peak temperature.
摘要:
Modified polystyrene-based resin particles comprising polyacrylic acid ester-based resin microparticles having an average particle diameter in the range of from 30 to 1,000 nm being dispersed in polystyrene-based resin particles, such that the polyacrylic acid ester-based resin microparticles are present (1) in the area ratio of from 0.1 to 15% in a surface area, which includes areas up to 20 µm from the surface of each resin particle, and (2) present in the area ratio of from 11 to 50% in the inner area, which includes the area between the center of each resin particle and an point 30% of the radius from the center of each particle.
摘要:
The flame retardant foam polystyrene bead according to the present invention comprises: (A) a mixed resin including (a1) about 90 wt% to about 99 wt% of a styrene resin and (a2) about 1 wt% to about 10 wt% of a char-generating thermoplastic resin; (B) inorganic foam particles dispersed in the mixed resin; and (C) a foaming agent impregnated into the mixed resin containing the dispersed inorganic foam particles. The foam produced using the flame retardant foam polystyrene bead has good flame retardancy, insulation, and mechanical strength properties.
摘要:
The present invention discloses an expandable vinyl aromatic polymer comprising: a) a matrix of a vinyl aromatic polymer, b) 1-10% by weight, calculated with respect to the polymer (a), of a blowing agent embedded in the polymeric matrix, c) 0.1 to 5% by weight, calculated with respect to the polymer (a), of talcum having a D50 particle size, measured by sedigraph (ISO 13317-3), of between 2.3 and 5 μm and a BET specific surface area, measured according to DIN 66131/2, of between 4.2 and 9.5 m2/g, d) 0.1 to 6% by weight, calculated with respect to the polymer of carbon black with a BET specific surface area, measured according to ASTM D-6556, of between 9 and 65 m2/g, e) 0.1 to 1% by weight, calculated with respect to the polymer (a), of polyethylene wax homogeneously distributed in the polymeric matrix.
摘要:
A polyethylene resin expanded particle has an expansion ratio of not less than 10 times and not more than 50 times, and in a DSC curve obtained by differential scanning calorimetry (DSC), the polyethylene resin expanded particle (i) shows two melting peaks, the two melting peaks being a low-temperature side melting peak and a high-temperature side melting peak, and (ii) further has a shoulder in a region not less than 100°C and not more than the low-temperature side melting peak temperature, the shoulder having a shoulder ratio which is not less than 0.2% and not more than 3%. This makes it possible to obtain a polyethylene resin expanded particle for producing a polyethylene resin in-mold expansion molded article in which especially an end (edge part) of the polyethylene resin in-mold expansion molded article is excellent in fusion bond level and appearance and which has neither a wrinkle nor a void on a surface thereof, is excellent in surface property (has a beautiful surface), and has a high expansion ratio.
摘要:
The invention relates to expandable polymers and/or polymer granulates of cellulose acetate butyrate (CAB) having an average molecular weight (Mn), determined as polystyrene-equivalent molecular weight by means of gel chromatography, of ≥ 20.000 g/mol and an average butyryl content of cellulose acetate butyrate of ≥ 20 wt. %, preferably ≥ 30 wt.%, and corresponding polymer foams.
摘要:
The present invention relates to a process for producing pre-expandable plastic beads adapted to be used in a injection-molding process for the manufacture of plastic components of devices or machines. The invention also refers to pre-expandable plastic beads obtainable according to said process. The pre-expandable plastic beads are particularly suitable for the production of injection molded plastic components of household appliances as washing machines, dryers, dishwashers, refrigerators. The process comprises the step of: a) providing plastic beads to be fed into an injection-mould machine for carrying out an injection-mould of a foamed plastic component; b) preparing a liquid solution comprising at least one blowing agent and a binder; c) coating said beads with a film of said liquid solution; d) letting said film to solidify onto said beads.
摘要:
The present invention provides expandable beads having an average particle size of 0.5 to 10 mm, a density of 0.033 to 0.80 g/cc, and a flame retardancy of V-0 or V-1 as measured according to the UL-94 vertical test (20 mm vertical burn test) in the UL standards.
摘要:
Verfahren zur Herstellung von expandierbaren thermoplastischen Partikeln durch Nachimprägnierung Zusammenfassung Ein Verfahren zur Herstellung von expandierbaren, thermoplastischen Polymerpartikeln durch Nachimprägnierung von thermoplastischen Polymerpartikeln, welche mindestens ein Styrolpolymer und mindestens ein Polyolefin enthalten, mit einem Treibmittel, wobei die Nachimprägnierung überwiegend in der Gasphase durchgeführt wird.