Abstract:
Provided are non-crosslinked foamed polyethylene resin particles that have a bulk density BD of 10 g/L or more and 100 g/L or less and are obtained by foaming polyethylene resin particles containing an antistatic agent in an amount of 0.1 part by weight or more and 3 parts by weight or less with respect to 100 parts by weight of a polyethylene resin and having a density of 0.920 g/cm3 or more and less than 0.940 g/cm3 and the non-crosslinked foamed polyethylene resin particles have a shrinkage ,ratio of 3% or more and 30% or less determined in accordance with Formula (1). The non-crosslinked foamed polyethylene resin particles can simply afford an antistatic molded non-crosslinked foamed polyethylene resin body that has a small shrinkage ratio with respect to mold dimension, is deformed in a small degree, and has good surface stretch.
Abstract:
AN IN-MOLD EXPANDED MOLDED PRODUCT OF THE PRESENT INVENTION INCLUDES EXPANDED POLYPROPYLENE RESIN PARTICLES COMPRISING A POLYPROPYLENE RESIN COMPOSITION CONTAINING AN ALIPHATIC DIETHANOLAMINE FATTY ACID ESTER AND AN ALIPHATIC DIETHANOLAMINE IN A TOTAL CONTENT OF NOT LESS THAN 0.1 PART BY WEIGHT BUT NOT GREATER THAN 5 PARTS BY WEIGHT WITH RESPECT TO 100 PARTS BY WEIGHT OF POLYPROPYLENE RESIN AND THE EXPANDED POLYPROPYLENE RESIN PARTICLES.
Abstract:
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.
Abstract:
Provided are non-crosslinked foamed polyethylene resin particles that have a bulk density BD of 10 g/L or more and 100 g/L or less and are obtained by foaming polyethylene resin particles containing an antistatic agent in an amount of 0.1 part by weight or more and 3 parts by weight or less with respect to 100 parts by weight of a polyethylene resin and having a density of 0.920 g/cm 3 or more and less than 0.940 g/cm 3 , and the non-crosslinked foamed polyethylene resin particles have a shrinkage ratio of 3% or more and 30% or less determined in accordance with Formula (1). The non-crosslinked foamed polyethylene resin particles can simply afford an antistatic molded non-crosslinked foamed polyethylene resin body that has a small shrinkage ratio with respect to mold dimension, is deformed in a small degree, and has good surface stretch. Shrinkage ratio = (BD-VBD) x 100/VBD (1) In the formula, BD is a bulk density of the non-crosslinked foamed polyethylene resin particles at 23°C and 0.1 MPa (under standard atmospheric pressure), and VBD is a bulk density of the non-crosslinked foamed polyethylene resin particles at 23°C under a reduced pressure of 0.002 MPa or less.
Abstract translation:本发明提供了非交联发泡聚乙烯系树脂粒子thathave的堆积密度为10g / L以上,100克/升或更少的BD和由(重量)或使含有抗静电剂的聚乙烯系树脂粒子在0.1份的量得到 以上且3重量份或更少,相对于100重量份的聚乙烯树脂的并具有密度为0.920g / cm 3以上且小于0.940克/ cm 3,且该非交联发泡聚乙烯系树脂粒子具有 在雅舞蹈开采与式3%以上且30%以下的确定性的收缩率(1)。 非交联发泡聚乙烯系树脂粒子可以简单地得到抗静电模制非交联发泡聚乙烯树脂体确实具有相对于模具尺寸的收缩率小,变形在一个小的程度,并且具有良好的表面伸展。 收缩率=(BD-VBD)×100 / VBD(1)在式中,BD是在23℃和0.1MPa下的非交联发泡聚乙烯系树脂粒子的体积密度(在标准大气压下),和VBD是 非交联发泡聚乙烯系树脂粒子在23℃的0002兆帕或更低的减压下的堆积密度。
Abstract:
PROBLEM TO BE SOLVED: To provide polypropylene-based resin particles capable of producing polypropylene-based resin preliminary foaming particles having a high foaming magnification and no fluctuation of cell. SOLUTION: This method of producing polypropylene-based resin preliminary foaming particles uses as a base material resin, a polypropylene-based resin composition containing: 100 pts.wt. of a polypropylene-based resin comprising 80 wt.% or more and 99 wt.% or less of a polypropylene-based resin having a comonomer content of less than 4.0 wt.%, and 1 wt.% or more and 20 wt.% or less of a polypropylene-based resin having a comonomer content of 4.0 wt.% or more; and 0.01 pt.wt. or more and 10 pts.wt. or less of a hydrophilic compound. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide polyolefin-based resin preliminarily foamed particles with little variation of the foaming ratio in the case of using carbon dioxide, which is regarded as being likely to bring about significant variation of the foaming ratio, as the foaming agent. SOLUTION: The polyolefin-based resin preliminarily foamed particles are composed of a polyolefin-based resin composition including 0.01 to 10 pts.wt. of hydrophilic organic compound with respect to 100 pts.wt. of the polyolefin-based resin, and is obtained by using gaseous carbon dioxide as the foaming agent, wherein the variation of the foaming ratio represented by formula (1): Variation of the foaming ratio (%)=(σ m /K av )×100 is 10% or less. (wherein K av is the average foaming ratio calculated with the weight fraction W i of each of sieved retention foamed particles after sieving and the foaming ratio K i obtained by using equation K av =Σ(K i ×W i ), and σ m is a standard deviation calculated with the weight fraction W i of each of sieved retention foamed particles after sieving and the foaming ratio K i obtained by using equation σ m =√Σ{W i ×(K av -K i ) 2 }). COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation:待解决的问题:为了提供在使用被认为可能引起发泡率的显着变化的二氧化碳的情况下,几乎不发生发泡率变化的聚烯烃系树脂预发泡粒子,作为 发泡剂。 解决方案:聚烯烃类树脂预发泡颗粒由包含0.01至10重量份的聚烯烃基树脂组合物组成。 的亲水性有机化合物相对于100重量份 通过使用气态二氧化碳作为发泡剂获得,其中由式(1)表示的发泡率的变化:发泡率的变化(%)=(σ m < / SB> / K SB>)×100为10%以下。 (其中K S av SB>是在筛分后的每个筛分的保留发泡颗粒的重量分数W SB i i / SBB计算的平均发泡比,并且发泡比K < SB>通过使用方程式K S获得,并且σ m SB>是 用筛分后的每个筛分保留发泡颗粒的重量分数W SB i i / SB计算的标准偏差和通过使用等式σ m获得的发泡比K SB> =√ΣäW我 SB>×(K AV SB> -K 我 SB>) 2 SP>})。 版权所有(C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain an in-mold expansion-molded body that is obtained by filling polypropylene-based resin foamed particles in a mold and by heat-molding with steam, especially which is excellent in the fusion of the foamed particles from low temperatures and which has little deformation in the molded body and little clearance among the constituent particles one another (owing to the high elongation of the expanded particles) and also which is uniformly fused and excellent in the surface properties. SOLUTION: The solution found out is such that it is necessary to control the heat shrinkage starting temperature of the expanded particles in order not to cause the degradation of the surface properties and the fusion maldistribution in a molded body and also to use a low melting point polypropylene-based resin in order to mold under a low molding pressure. COPYRIGHT: (C)2010,JPO&INPIT