WO2015101242A1 - 一种高填充高回弹软质发泡聚乙烯材料及其制备方法 - Google Patents
一种高填充高回弹软质发泡聚乙烯材料及其制备方法 Download PDFInfo
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- WO2015101242A1 WO2015101242A1 PCT/CN2014/095237 CN2014095237W WO2015101242A1 WO 2015101242 A1 WO2015101242 A1 WO 2015101242A1 CN 2014095237 W CN2014095237 W CN 2014095237W WO 2015101242 A1 WO2015101242 A1 WO 2015101242A1
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Definitions
- the invention relates to a polyethylene material, in particular to a high-filling, high-rebound soft foamed polyethylene material and a preparation method thereof.
- Foamed polyethylene material has smooth surface, excellent impact absorption, excellent cushioning shock absorption and resilience, high tensile strength, excellent chemical stability, good environmental aging resistance and weather resistance, insulation and heat insulation.
- the low price is the most widely used foaming material.
- polyethylene foaming materials still have insufficient bending strength, poor compressive strength and heat resistance, and low rigidity and hardness, which limits their application.
- people often add inorganic fillers in the material molding process on the one hand can improve the rigidity, hardness and other mechanical properties of foamed polyethylene materials, on the other hand, can reduce the cost of materials, but the actual product performance is still not ideal.
- One of the objects of the present invention is to provide a high-fill, high-rebound soft foamed polyethylene material which can improve rigidity, hardness and compressive strength and has low cost, and a preparation method thereof.
- Another object of the present invention is to provide a process for preparing a highly filled, high resilience soft foamed polyethylene material.
- a high-filled high-rebound soft foamed polyethylene material including the following parts by weight:
- the polyethylene (PE) may be at least one of low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE).
- LDPE low density polyethylene
- HDPE high density polyethylene
- LLDPE linear low density polyethylene
- the elastomer is at least one of POE, EVA, SEBS, SBS, EPDM, and EPR.
- the modified calcium carbonate is a coupling agent modified calcium carbonate.
- the preparation method of the coupling agent modified calcium carbonate includes the following steps:
- the coupling agent may be one or more mixtures of a titanate coupling agent, a silane coupling agent, and an aluminum zirconate coupling agent.
- the modified calcium carbonate has a mesh number of ⁇ 500 mesh.
- the chemical foaming agent is composed of azodicarbonamide, zinc oxide and zinc stearate in a mass ratio of 1: (1-1.5): (0.15-2).
- the crosslinking agent includes dicumyl peroxide or 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.
- the physical foaming agent is an expandable microsphere foaming agent, and is a novel special foaming agent produced by Matsumoto Corporation of Japan.
- the expandable microsphere foaming agent is a milky white micro spherical plastic particle with a diameter of 10- 30 microns. When heated at a certain temperature, the thermoplastic shell softens, the gas inside the casing expands, the volume of the foaming agent can be increased to several tens of times, and the core-shell structure is not destroyed, thereby achieving the foaming effect.
- a preparation method of a high-filling high-rebound soft foamed polyethylene material comprising the following steps:
- the kneaded material in the mold place the mold in the flat vulcanizing machine, and heat-expand it for 5 to 15 minutes at 160-180 ° C, 5 to 15 MPa, remove the mold, and lightly press and shape.
- the foamed polyethylene material can be obtained; or the kneaded material is placed in a mold, and the mold is placed in a flat vulcanizing machine, and foamed at 145-165 ° C, 5-15 MPa for 3 to 10 minutes, and cooled to After demolding at room temperature, the foamed material after demolding is secondarily foamed at 170 to 180 ° C for 5 to 10 minutes to obtain a foamed polyethylene material.
- the invention has the beneficial effects that a high-filled calcium carbonate high-rebound soft foamed polyethylene material with a calcium carbonate filling amount of 55 to 75% can be prepared, and the elasticity of the foamed material is maintained. Improve the rigidity, hardness and compressive strength of the material while reducing the material density.
- the invention has simple production process, can greatly reduce cost, and is economical and practical.
- a high-filled, high-rebound soft foamed polyethylene material comprising the following parts by weight:
- a high-filled, high-rebound soft foamed polyethylene material comprising the following parts by weight:
- a high-filled, high-rebound soft foamed polyethylene material comprising the following parts by weight:
- the polyethylene (PE) may be at least one of low density polyethylene (LDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE) or low density polyethylene (LDPE),
- LDPE low density polyethylene
- the mass ratio of high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) is 1: (0-1.0): (0.5-2).
- the elastomer is one of POE, EVA, SEBS, and EPDM.
- the modified calcium carbonate is a coupling agent modified calcium carbonate, and the modified calcium carbonate has a mesh number of ⁇ 500 mesh.
- the chemical foaming agent is composed of azodicarbonamide, zinc oxide and zinc stearate in a mass ratio of 1: (1-1.5): (0.15-2).
- the chemical foaming agent is azodicarbonamide, zinc oxide and zinc stearate according to a mass ratio of 1: 1.3: 1.5 mixed composition, this ratio can make the mixture foam rapidly and stable at 160-180 °C.
- the crosslinking agent includes dicumyl peroxide or 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.
- the physical foaming agent is an expandable microsphere foaming agent, preferably, an expandable microsphere foaming agent of the type MSH-500 produced by Matsumoto Corporation of Japan, and the expandable microsphere foaming agent is a milky white microsphere.
- Plastic pellets 10-30 microns in diameter. When heated at a certain temperature, the thermoplastic shell softens, the gas inside the casing expands, the volume of the foaming agent can be increased to several tens of times of itself, and the core-shell structure is not destroyed, thereby achieving the foaming effect.
- the preparation method of the above high-filled high-rebound soft foamed polyethylene material comprises the following steps:
- the kneaded material in the mold place the mold in the flat vulcanizing machine, and heat-expand it for 5 to 15 minutes at 160-180 ° C, 5 to 15 MPa, remove the mold, and lightly press and shape.
- the foamed polyethylene material can be obtained; or the kneaded material is placed in a mold, and the mold is placed in a flat vulcanizing machine, and foamed at 145-165 ° C, 5-15 MPa for 3 to 10 minutes, and cooled to After demolding at room temperature, the foamed material after demolding is secondarily foamed at 170 to 180 ° C for 5 to 10 minutes to obtain a foamed polyethylene material.
- the method for preparing the above high-filled high-rebound soft foamed polyethylene material comprises the following steps:
- the kneaded material is placed in a mold, and then the mold is placed in a flat vulcanizing machine, and reacted at 165 ° C, 10 MPa for 10 minutes, the material is taken out by mold opening, and the target foaming material is obtained by light pressure cooling.
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims (8)
- 一种高填充高回弹软质发泡聚乙烯材料,其特征在于,包括以下重量份的原料:聚乙烯 15-20份、弹性体5-20份、改性碳酸钙60-80份、化学发泡剂1-10份、交联剂0.5-1.5份和物理发泡剂1-5份。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述聚乙烯为低密度聚乙烯、高密度聚乙烯、线型低密度聚乙烯中的至少一种。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述弹性体为POE、EVA、SEBS、SBS、EPDM、EPR中的至少一种。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述改性碳酸钙为偶联剂改性碳酸钙,所述改性碳酸钙的目数≥500目。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述化学发泡剂为偶氮二甲酰胺、氧化锌、硬脂酸锌按照质量比1:(1-1.5):(0.15-2)混合组成。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述交联剂包括过氧化二异丙苯或者2,5-二甲基-2,5-二(叔丁过氧基)己烷。
- 按照权利要求1所述的一种高填充高回弹软质发泡聚乙烯材料,其特征在于,所述物理发泡剂为可膨胀微球发泡剂。
- 按照权利要求1-7任一所述的一种高填充高回弹软质发泡聚乙烯材料的制备方法,其特征在于,包括以下步骤:1)将改性碳酸钙干燥至水分质量比含量≤0.1%;2)将聚乙烯与弹性体置于开炼机中进行塑炼,塑炼温度110~120℃,塑炼时间2~5分钟;3)将改性碳酸钙、物理发泡剂、化学发泡剂、交联剂按顺序加入上步的体系进行混炼,混炼温度120~130℃,混炼时间10~15分钟;4)将混炼后的物料放在模具中,将模具置于平板硫化机中,在160~180℃,5~15MPa条件下热压发泡5~15分钟,开模取出,轻压定型即可制得发泡聚乙烯材料;或将混炼后的物料放在模具中,将模具置于平板硫化机中,在145~165℃,5~15MPa条件下发泡3~10分钟,冷却至室温脱模,将脱模后的发泡物在170~180℃下二次发泡5~10分钟即可制得发泡聚乙烯材料。
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JP6403752B2 (ja) | 2018-10-10 |
US20160009885A1 (en) | 2016-01-14 |
EP2957594A4 (en) | 2016-05-18 |
AU2014375530A1 (en) | 2015-10-01 |
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