HIPS (high impact polystyrene) composite material as well as preparation method and application thereof

Abstract

The invention discloses an HIPS (High Impact Polystyrene) composite material which comprises the following components in parts by weight: 90-100 parts of HIPS; 0.1 to 1 part of PET colored ribbon particles; 0.5 to 10 parts of SBS (styrene butadiene styrene); and the average particle size range of the PET colored ribbon particles is 100-3000 microns. By utilizing the characteristic that the color PET film with the average length of 200-3000 microns is poor in compatibility with HIPS and SBS, even if the color PET film is heated to be molten in the extrusion process, the color PET film is not compatible with HIPS and SBS, the color PET film is stretched and dispersed in a resin matrix, irregular colored ribbon particles are formed after extrusion and are distributed in the resin matrix and on the surface of the composite material, and the color ribbon particles are uniformly dispersed in the resin matrix and the surface of the composite material. The appearance of the HIPS composite material presents various shapes and colors, and the performance of the HIPS composite material is not obviously influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a HIPS composite material and a preparation method and application thereof. Background Art

[0002] Polystyrene materials usually include transparent GPPS and high-impact polystyrene HIPS. High-impact polystyrene, also known as HIPS, is a thermoplastic material made of elastomer-modified polystyrene. The two-phase system consisting of a rubber phase and a continuous polystyrene phase has developed into an important polymer commodity in the world. This general product has a wide range of impact properties and processing properties, making it widely used in automobiles, appliances, electric products, furniture, household appliances, telecommunications, electronics, computers, disposables, medicine, packaging and entertainment markets.

[0003] PET film is widely used in the packaging field, with rich color sources and good physical properties. Therefore, applying recycled colored PET film to the modification of HIPS can effectively solve the problem of environmental pollution caused by waste PET film. However, due to the poor compatibility between PET and HIPS, it is difficult to effectively utilize waste PET film in HIPS. Summary of the invention

[0004] The object of the present invention is to provide a HIPS composite material which has a colorful and unique appearance and maintains good mechanical properties.

[0005] The present invention is achieved through the following technical solutions: A HIPS composite material, comprising the following components in parts by weight: HIPS 90-100 copies; PET ribbon particles 0.1-1 part; SBS 0.5-10 parts; The average particle size of PET ribbon particles ranges from 100 to 3000 microns.

[0006] The test method for the average particle size of PET ribbon particles in the HIPS composite resin matrix is as follows: the HIPS composite material is injection molded into a 20mm×20mm×3mm square plate, the diameter of the PET ribbon particles on the square plate is measured by the second element, and the average value is calculated.

[0007] The PET ribbon particles are derived from broken colored PET film fragments, and the average length of the colored PET film fragments is between 200-3000 microns. The color is non-white such as red, yellow, blue, green, purple, orange, etc. The average length of the broken colored PET film fragments is obtained by testing with a laser particle size analyzer.

[0008] In the technical solution of the present invention, the broken colored PET film fragments can be obtained by self-making or recycled. Preferably, the broken colored PET film is derived from recycled PET colored film pulverized material. Specifically, the recycled PET colored film is a PET decorative film, the outer layer PET colored film of a milk tea cup, a building decorative film, a backplane film used on a photovoltaic panel, etc.

[0009] In the technical solution of the present invention, HIPS can be new material or obtained by recycling. Preferably, the HIPS is derived from recycled HIPS.

[0010] The melting point range of the PET ribbon particles is 250 - 260 °C, the melting temperature range of the HIPS is 180 - 250 °C, and the melting temperature range of the SBS is 180 - 250 °C. The test method for the melting temperature is to determine the melting peak temperature (Tm) of the PET material by DSC.

[0011] Whether to add 0 - 2 parts of additives can be selected according to actual needs. The additives are selected from antioxidants, lubricants, ultraviolet light absorbers, etc. The antioxidant can be a hindered phenol type, a phosphite type, a metal alkyl thiophosphate type, a carbamate type, an organic sulfur type antioxidant.

[0012] Whether to add 0 - 10 parts of inorganic fillers can be selected according to actual needs. The inorganic fillers can be calcium carbonate, talcum powder, barium sulfate, kaolin, glass fiber, etc.

[0013] The preparation method of the HIPS composite material of the present invention includes the following steps: mixing each component evenly, and extruding and pelletizing through a twin-screw extruder to obtain the HIPS composite material, wherein the temperature range of the barrel is 120 - 190 °C.

[0014] The temperature of the twin-screw extruder is divided into ten zones. The temperature of the first to second zones is 120 °C to 170 °C, the temperature of the third to fifth zones is 160 °C to 180 °C, and the temperature of the sixth to tenth zones is 170 °C to 190 °C.

[0015] The colored PET film fragments are obtained by crushing through a high-speed single-piece breaker, and the average length is between 200 - 3000 microns.

[0016] The application of the HIPS composite material of the present invention is used for preparing packaging boxes and cups.

[0017] The present invention has the following beneficial effects: The present invention selects a colored PET film with a length between 200 and 3000 microns and the characteristics of poor compatibility with HIPS and SBS. Even when the colored PET film is heated and melted during the extrusion process, it will not be compatible with HIPS and SBS. It is stretched and dispersed in the resin matrix, and after extrusion, it solidifies to form an irregular ribbon particle state distributed in and on the surface of the composite resin matrix, making the appearance present various shapes and colors, improving the appearance perception, and not significantly affecting the performance of the HIPS composite material. Description of the Drawings

[0018] Figure 1 : Photo of Appearance Grade 1, showing that the PET ribbon particles in the illustration have a large particle size and a high density.

[0019] Figure 2 : Photo of Appearance Grade 2, showing that the PET ribbon particles in the illustration have a medium particle size and a general density.

[0020] Figure 3 : Photo of Appearance Grade 3, showing that the PET ribbon particles in the illustration have a small particle size and a low density. Detailed Description of the Invention

[0021] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0022] The sources of the raw materials used in the present invention are as follows: HIPS-1: Recycled material from commercially available air conditioner shells, crushed into particles, and its main composition is: HIPS, accounting for more than 98% of the total weight.

[0023] HIPS-2: MA5210, Jiangsu Yashide; SBS: SBS YH-792E, Baling Petrochemical; The colored PET film is: The recycled green PET decorative film is washed and then broken by a high-speed single-chip breaker, and then the following damaged fragment raw materials with an average length are obtained through screening.

[0024] Colored PET film A: Average length 203 microns; Colored PET film B: Average length 633 microns; Colored PET film C: Average length 1979 microns; Colored PET film D: Average length 2672 microns; Talc powder: TYT-777A, 3000 mesh, Beihai Group; Antioxidants: RIANOX 1010 and RIANOX 168, purchased from Tianjin Li’anlong New Materials Co., Ltd.; Embodiment and comparative example The preparation method of HIPS composite material: The components are mixed evenly, and extruded and granulated by a twin-screw extruder to obtain a HIPS composite material, wherein the temperature of the screw barrel is set as follows: the temperature of the twin-screw extruder is divided into ten zones, wherein the temperature of zones one to two is 120°C to 170°C, the temperature of zones three to five is 160°C to 180°C, and the temperature of zones six to ten is 170°C to 190°C.

[0025] Various test methods: (1) Average length of PET ribbon particles: The HIPS composite material was injection molded into a 20 mm × 20 mm × 3 mm square plate. The diameter of the PET ribbon particles on the square plate was measured by two-dimensional measurement, and the average value was calculated.

[0026] (2) Appearance grade: Observe the PET ribbon particles distributed on the surface of the square plate. The larger the average particle size of the PET ribbon particles, the denser the PET ribbon particles, and the better the appearance. The specific scores are as follows: 1: The spots are large and dense, and the color is darker. Figure 1 ; 2. Medium particle size but average density, such as Figure 2 ; 3: The particle size is small and the density is low. The colored spots appear to be very small and sparse, and the color is very light, such as Figure 3 (3) ISO527 tensile strength and ISO 180:2023 Izod notched impact strength.

[0027] Table 1: Weight content of each component and test results of HIPS composite materials in Examples and Comparative Examples Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 HIPS-1 (Recycled Material) 95 95 95 95 100 HIPS-2 (New Material) 90 100 Colored PET Film A 0.1 0.5 1 0.5 Colored PET Film B 0.5 Colored PET Film C 0.5 Colored PET Film D 0.5 SBS 0.5 5 10 5 5 5 / Talc Powder 5 10 Antioxidant 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Average Diameter of PET Ribbon Particles, Micron 130 163 188 500 1602 2383 91 Appearance Score 2 2 2 2 1 1 3 Tensile Strength, MPa 22 24 20 20.5 19.8 20.8 28 <![CDATA[Impact strength, kJ / m 2 > 8 11.5 16 11.5 11.8 10.9 8 It can be seen from Examples 2 / 4 / 5 / 6 that the length of the colored PET film material does not significantly affect the mechanical properties.

[0028] It can be seen from Comparative Example 1 that SBS not only provides toughness, but also affects the stretching and dispersion of the PET color film. When SBS is not contained, the average particle size of the PET ribbon particles in the HIPS composite material is lower, the spots on the surface look very sparse, and the color is very light, which causes the appearance to deteriorate.

Claims

1. A HIPS composite material, characterized in that, By weight, it comprises the following components: 90 - 100 parts of HIPS; 0.1 - 1 part of PET ribbon particles; 0.5 - 10 parts of SBS; The average particle size range of the PET ribbon particles is 100 - 3000 microns.

2. The HIPS composite material according to claim 1, characterized in that, The PET ribbon particles are derived from broken colored PET film fragments, and the average length of the colored PET film fragments is between 200 - 3000 microns.

3. The HIPS composite material according to claim 2, wherein The broken colored PET film fragments are derived from recycled PET colored films.

4. The HIPS composite material according to claim 1, characterized in that, The HIPS is derived from recycled HIPS.

5. The HIPS composite material according to claim 1, characterized in that, The melting point range of the PET ribbon particles is 250 - 260 °C, the melting temperature range of the HIPS is 180 - 250 °C, and the melting temperature range of the SBS is 180 - 250 °C.

6. The HIPS composite material according to claim 1, wherein By weight, it further comprises 0 - 2 parts of additives, and the additives are selected from at least one of antioxidant, lubricant, and ultraviolet light absorber.

7. The HIPS composite material according to claim 1, wherein By weight, it further comprises 0 - 10 parts of inorganic filler.

8. The preparation method of the HIPS composite material according to any one of claims 1-7, characterized in that, It comprises the following steps: Mix the components evenly, and extrude and pelletize through a twin-screw extruder to obtain a HIPS composite material, wherein the temperature range of the barrel is 120 - 190 °C.

9. Use of the HIPS composite material according to any one of claims 1-7, characterized in that, It is used for preparing packaging boxes and cups.

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