CN-116285142-B - High-rigidity, high-impact and fatigue-resistant long glass fiber reinforced regenerated styrene material and preparation method thereof

CN116285142BCN 116285142 BCN116285142 BCN 116285142BCN-116285142-B

Abstract

The invention provides a high-rigidity, high-impact and fatigue-resistant long glass fiber reinforced regenerated styrene material and a preparation method thereof, wherein the styrene material comprises GPPS resin, a toughening agent, glass fiber, a compatilizer, an adhesive, an antioxidant and a lubricant; in the styrene material, GPPS regenerated resin is adopted as a main material, and the characteristics of low molecular weight and high fluidity of the regenerated material are fully utilized. The melt can be uniformly and continuously coated on the long glass fiber by matching with a specific preparation process, so that the particles with stable glass fiber content and smooth surface are obtained, and the wire pulling speed can reach 80m/s. The long glass fiber reinforced polystyrene material with high glass fiber content, strong binding force and excellent performance is prepared by adopting long glass fiber as a reinforcing phase and selecting low-melting-point carbon five and carbon nine petroleum resin binders. The long glass fiber styrene material provided by the invention has the advantages of low cost, high rigidity, strong impact resistance and strong fatigue resistance.

Inventors

WANG CHEN
REN JUNJIE
LIU CHENGGANG
LIU JIANGANG
REN XINBO
WANG XIANHONG
ZHANG XIUWEN
Ji Aijing

Assignees

青岛海纳新材料有限公司

Dates

Publication Date: 20260508
Application Date: 20230414

Claims (4)

1. The high-rigidity high-impact fatigue-resistant long glass fiber reinforced regenerated styrene material is characterized by comprising the following raw materials in parts by weight: 45-70 parts of GPPS resin, 5-10 parts of toughening agent, 30-40 parts of glass fiber, 3-5 parts of compatilizer, 5-15 parts of adhesive, 0.1-1 part of antioxidant and 0.1-2 parts of lubricant; the GPPS resin is GPPS regenerated resin recovered by a hot melt physical method, the melt flow rate of the GPPS resin is 20-30g/10min under the condition of 200 ℃ per 5kg, and the relative molecular weight is 50000-100000g/mol; The glass fiber is internally treated with an impregnating compound containing a polyurethane emulsion film forming agent, a silane coupling agent and a pH regulator, and the diameter of the glass fiber is 14 mu m; the compatilizer is methacrylate glycidyl ester grafted styrene-ethylene-butylene-styrene block copolymer; the adhesive is a mixture of carbon five petroleum resin and carbon nine petroleum resin with annular structures, and the proportion is 1:1; The lubricant is compounded by pentaerythritol stearate, N-ethylene distearamide and styrene-acrylonitrile grafted low molecular weight copolymer.
2. The high-rigidity, high-impact-resistance and fatigue-resistance long glass fiber reinforced regenerated styrene material according to claim 1, wherein the toughening agent is one or a mixture of more than two of styrene-butadiene-styrene triblock copolymer, styrene-butadiene diblock copolymer, styrene-ethylene-butylene-styrene block copolymer and methyl methacrylate-butadiene-styrene copolymer.
3. The high-rigidity, high-impact-resistance and fatigue-resistance long glass fiber reinforced regenerated styrene material according to claim 1, wherein the antioxidant is an amine antioxidant or a phosphite antioxidant.
4. A high rigidity, high impact, fatigue resistant long glass fiber reinforced recycled styrene material according to any one of claims 1-3, characterized by the following procedure: (1) Preparing materials, namely weighing the raw materials according to the proportion of the raw materials for standby; (2) Mixing, namely adding GPPS resin, a toughening agent, a compatilizer, an adhesive, an antioxidant and a lubricant into a stirring kettle according to parts by weight, and fully mixing to obtain a premix for later use; (3) Adding the premix into a double-screw extruder, extruding a melt into an impregnation die after double-screw mixing, drawing continuous glass fibers by a tractor through the impregnation die filled with the melt, obtaining continuous fiber reinforced resin strips with smooth appearance and stable fiber content through a special-size die, and finally obtaining the long glass fiber reinforced regenerated styrene granular material after cooling, drawing and granulating the strips.

Description

High-rigidity, high-impact and fatigue-resistant long glass fiber reinforced regenerated styrene material and preparation method thereof Technical Field The invention relates to the technical field of composite material reinforcement and toughening, in particular to a high-rigidity, high-impact and fatigue-resistant long glass fiber reinforced regenerated styrene material and a preparation method thereof. Background With the widespread use of plastic products, the problem of waste caused by plastic products is becoming one of the environmental burdens, and about 3000 ten thousand tons of plastic waste are produced annually by human beings, wherein 1410 ten thousand tons of plastic waste is plastic packaging waste, and only a relatively small part of plastic waste is properly treated, so that the recycling ratio is only 14% according to data. The plastic packaging material is mainly made of polystyrene (GPPS) foam and is widely applied to take-out, express delivery and cold chain transportation. The material recovered by the waste foam box is developed, so that the recovery strength of waste plastics can be further improved, and the landfill, incineration and existence of the waste plastics in the natural environment are reduced. The market air conditioner fan blade mainly uses short glass fiber reinforced SAN material, and a large amount of material powder can be produced in the production process to cause material waste, and in addition, the difference of glass fiber length easily causes uneven distribution in injection molding parts to influence the quality of the parts. GPPS is a general-purpose polystyrene material, has the defect of brittleness, and is degraded by aging after being recycled, so that the performance of the GPPS is greatly reduced. When a large amount of glass fibers are added, the rigidity is improved, but the impact performance is obviously reduced, so that the use requirement is difficult to meet, and therefore, how to utilize the glass fibers to enhance the toughness of the polystyrene material is a technical problem to be solved at present. Although the preparation methods of the continuous long glass fiber reinforced SAN master batch are described in the published patent CN.102827432B and CN110964270A, the toughening system used in the preparation methods has higher cost and is not suitable for commercial application and popularization. Therefore, the polystyrene material which is low in cost and capable of effectively avoiding the problems of excessive material dust and uneven dispersion of glass fibers in the production of air-conditioning fan blades has important significance in the field of air-conditioning fan blade production. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a high-rigidity, high-impact and fatigue-resistant long glass fiber reinforced regenerated styrene material and a preparation method thereof. And then the melt can be uniformly and continuously coated on the long glass fiber by matching with a specific preparation process, so that the particles with stable glass fiber content and smooth surface are obtained, and the wire pulling speed can reach 80m/s. The long glass fiber reinforced polystyrene material with high glass fiber content, strong binding force and excellent performance is prepared by adopting long glass fiber as a reinforcing phase and selecting low-melting-point carbon five and carbon nine petroleum resin binders. The long glass fiber styrene material provided by the invention has the advantages of low cost, high rigidity, strong impact resistance and strong fatigue resistance. The technical scheme of the invention is as follows: the high-rigidity high-impact fatigue-resistant long glass fiber reinforced regenerated styrene material comprises the following raw materials in parts by weight: 45-70 parts of GPPS resin, 5-10 parts of toughening agent, 30-40 parts of glass fiber, 3-5 parts of compatilizer, 5-15 parts of adhesive, 0.1-1 part of antioxidant and 0.1-2 parts of lubricant. Preferably, the GPPS resin is a GPPS regenerated resin recovered by a hot melt physical method, the melt flow rate of the GPPS resin is 20-30g/10min under the condition of 200 ℃ per 5kg, and the relative molecular weight is 50000-100000 g/mol. Preferably, the toughening agent is one or more than two of styrene-butadiene-styrene triblock copolymer, styrene-butadiene diblock copolymer (K glue), styrene-ethylene-butylene-styrene block copolymer and methyl methacrylate-butadiene-styrene copolymer. Preferably, the glass fiber is internally provided with a wetting agent containing a polyurethane emulsion film forming agent, a silane coupling agent and a pH regulator, and the diameter of the glass fiber is 14 mu m. Preferably, the compatibilizer is a glycidyl methacrylate grafted styrene-ethylene-butylene-styrene block copolymer (SEBS-g-GMA). Preferably, the binder is a mixture of carbon five petroleum resin and carbon nine petroleum res