Long-cut glass fiber modified PA6 / ABS alloy material

Abstract

The invention discloses a long cut glass fiber modified PA6 / ABS alloy material, and belongs to the field of polymer composite materials. The long cut glass fiber modified PA6 / ABS alloy material comprises the following raw materials in parts by weight: 60-80 parts of PA6 resin; 20 to 40 parts of ABS resin; 5 parts of a compatilizer; and 20-40 parts of modified glass fiber. Compared with the prior art, the alloy material has the characteristics of high strength, high modulus and high toughness, and can be applied to extreme environments such as severe cold areas.

Description

Technical Field

[0001] The invention relates to the field of polymer composite materials, and in particular to a chopped glass fiber modified PA6 / ABS alloy material. Background Art

[0002] In recent years, PA6 alloying has become the mainstream of the development of modified engineering plastics. Alloying is an important way to achieve high performance of PA6, and it is also the main means to manufacture special materials and improve material performance. PA6 / ABS alloy has both the rigidity, heat resistance and chemical resistance of PA6, and the dimensional stability and impact resistance of ABS. With the continuous expansion of the application fields of PA6 / ABS alloy, it has been widely used in the fields of electronic appliances, automotive parts, machinery, etc., and the product performance indicators have become more stringent.

[0003] With the development of science and technology, electronic and electrical products are constantly developing towards high strength and high toughness, which puts higher requirements on the performance of PA6 / ABS alloy materials, and ordinary PA6 / ABS alloys are difficult to meet the requirements. Therefore, it is necessary to develop PA6 / ABS alloys with excellent commercial properties. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a chopped glass fiber modified PA6 / ABS alloy material.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The first aspect of the present invention relates to a chopped glass fiber modified PA6 / ABS alloy material, comprising the following raw materials in parts by weight:

[0007] 60-80 parts of PA6 resin;

[0008] ABS resin 20-40 parts;

[0009] 5 parts of compatibilizer;

[0010] 20-40 parts of modified glass fiber;

[0011] The preparation method of the modified glass fiber comprises the following steps: mixing glycidyl methacrylate and glass fiber, and adding hydrofluoric acid; then vacuuming, heating and drying, and then cooling to room temperature to obtain the modified glass fiber.

[0012] Optionally, the compatibilizer is ABS-MAH.

[0013] Optionally, the mass ratio of the glycidyl methacrylate, glass fiber and hydrofluoric acid is 6:20:1.

[0014] Optionally, the chopped glass fiber is one or more of alkali-free glass fiber, medium-alkali glass fiber and high-strength glass fiber.

[0015] Optionally, the chopped glass fibers have a fiber length of 10 to 20 mm and a fiber diameter of 5 to 24 μm.

[0016] Optionally, the invention further comprises 1 part by weight of an auxiliary agent consisting of an antioxidant, an auxiliary antioxidant, a light absorber and a light stabilizer.

[0017] Optionally, the antioxidant is a hindered phenol antioxidant, the auxiliary antioxidant is a phosphite antioxidant, the light absorber is a benzotriazole light absorber, and the light stabilizer is a hindered amine light stabilizer.

[0018] Optionally, the mass ratio of the antioxidant, the auxiliary antioxidant, the light absorber and the light stabilizer is 1:1:1:1.

[0019] The second aspect of the present invention relates to a method for preparing a long-cut glass fiber modified PA6 / ABS alloy material, comprising the following steps: 60 to 80 parts by weight of PA6 resin, 20 to 40 parts by weight of ABS resin, and 5 parts by weight of a compatibilizer are mixed and fed into a main feed port of a parallel twin-screw extruder, 20 to 40 parts by weight of glass fiber are added from a side feed port, and the glass fiber modified PA6 / ABS alloy material is melted, extruded, and granulated.

[0020] Optionally, the barrel temperature of the parallel twin-screw extruder is 160°C in zone 1, 180°C in zone 2, 190°C in zone 3, 200°C in zone 4, 210°C in zone 5, 220°C in zone 6, and 210°C in the head; the screw speed is 500r / min, the melt pressure is 1.0MPa, the vacuum degree is -0.06MPa, the barrel temperature of the injection molding machine is 260°C, and the mold temperature is 60°C.

[0021] The PA6 resin is an industrial conventional PA6 resin, and preferably, the relative viscosity of PA6 is 2.0-3.2.

[0022] The ABS resin is a copolymer of acrylonitrile, butadiene and styrene, wherein the percentage (weight ratio) of butadiene is 40-70%.

[0023] Beneficial effects of the present invention:

[0024] 1. The glass fiber modified PA6 / ABS alloy material prepared by the present invention can be recycled and reused to meet the development needs of green and recycled materials for automobiles.

[0025] 2. The glass fiber modified PA6 / ABS alloy material prepared by the present invention, wherein the modified glass fiber has a certain aspect ratio in terms of physical structure and a certain polar group in terms of chemical composition. When the glass fiber is introduced into the PA6 / ABS alloy material, due to its large aspect ratio, when the material is damaged by stress, it can play a role of physical bridging, thereby effectively improving the mechanical properties of the PA6 / ABS alloy such as tensile strength, bending strength and impact strength. In addition, since the surface of the modified glass fiber has a grafted glycidyl ester group, it is more inclined to be distributed in the PA6 phase in thermodynamics, so that the viscosity of PA6 is increased, the viscosity ratio between PA6 and ABS is reduced, and the phase morphology is regulated, which is conducive to the transformation of PA6 and ABS into a co-continuous phase, thereby further improving the mechanical properties of the PA6 / ABS alloy.

[0026] 3. The preparation process of the present invention is simple and can be mass-produced. The injection-molded glass fiber modified PA6 / ABS alloy material products have the characteristics of high strength, high modulus, high toughness and high weather resistance, and have very high commercial properties. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] A chopped glass fiber modified PA6 / ABS alloy material comprises the following raw materials in parts by weight:

[0029]

[0030] The following examples are used to specifically illustrate the preparation process of a long glass fiber modified PA6 / ABS alloy material (wherein the parts in Examples 1-5 and Comparative Example 1 are all parts by mass).

[0031] The raw materials used in Examples 1-5 and Comparative Example 1 are as follows:

[0032] PA resin, viscosity 2.4~2.7Pa·s, manufacturer: Jiangsu Ruimeifu Company.

[0033] ABS resin brand ABS PA-757K, melt flow rate (200℃ / 5.0kg) is: 1.8g / 10min, manufacturer: Hengshui Diyi Petrochemical Co., Ltd.

[0034] ABS-MAH brand 225A, model: XH0250MANYSQ, manufacturer: Dongguan Xinrui New Materials Co., Ltd.;

[0035] Long chopped glass fiber, fiber length 15mm, manufacturer: Hebei Senade Nanomaterial Technology Co., Ltd.;

[0036] Hydrofluoric acid, model: industrial grade, manufacturer: Jinan Hongshun Chemical Co., Ltd.

[0037] Glycidyl methacrylate, active ingredient content 99%, manufacturer: Jinan Kaichuang Chemical Co., Ltd.

[0038] The main antioxidant brand is Irganox 565, manufacturer: BASF, Germany;

[0039] Auxiliary antioxidant brand AN 168, manufacturer: Qingdao Deda Special Chemical Group;

[0040] Light absorber brand Chiguard 5050, manufacturer: Chiguard Co., Ltd.;

[0041] Light stabilizer brand LA-52, manufacturer: Aidico (China) Investment Co., Ltd.

[0042] Preparation Example 1

[0043] The preparation steps of the modified glass fiber are as follows: weigh 0.6 kg of glycidyl methacrylate and 2 kg of glass fiber, mix them, and add 0.1 kg of hydrofluoric acid; then evacuate, heat and dry at 100° C., and then cool to room temperature to obtain a modified glass fiber product.

[0044] Example 1

[0045] S1, weigh 60 parts of PA6 resin, 40 parts of ABS resin, 5 parts of ABS-MAH and 1 part of additive, and stir them at a speed of 500 r / min for 10 minutes using a high-speed mixer to obtain a uniformly mixed material.

[0046] S2, feeding the uniformly mixed materials into the main feed port of a parallel twin-screw extruder, adding 20 parts of modified glass fiber from the side feed port, and obtaining PA6 / ABS alloy material through melting, extrusion and granulation; wherein the barrel temperature of the parallel twin-screw extruder is 160°C for zone 1, 180°C for zone 2, 190°C for zone 3, 200°C for zone 4, 210°C for zone 5, 220°C for zone 6, and 210°C for the die head, the screw speed is 500r / min, the melt pressure is 1.0MPa, and the vacuum degree is -0.06MPa.

[0047] S3, the extruded PA6 / ABS alloy material is put into an injection molding machine for melting to obtain a standard sample. The barrel temperature of the injection molding machine is 260°C and the mold temperature is 60°C.

[0048] Example 2

[0049] S1: the same as S1 in Example 1;

[0050] S2, feeding the uniformly mixed materials into the main feed port of a parallel twin-screw extruder, adding 30 parts of modified glass fiber from the side feed port, and obtaining PA6 / ABS alloy material through melting, extrusion and granulation; wherein the barrel temperature of the parallel twin-screw extruder is 160°C for zone 1, 180°C for zone 2, 190°C for zone 3, 200°C for zone 4, 210°C for zone 5, 220°C for zone 6, and 210°C for the die head, the screw speed is 500r / min, the melt pressure is 1.0MPa, and the vacuum degree is -0.06MPa.

[0051] S3, the same as S3 in Example 1;

[0052] Example 3

[0053] S1: the same as S1 in Example 1;

[0054] S2, feeding the uniformly mixed materials into the main feed port of a parallel twin-screw extruder, adding 40 parts of modified glass fiber from the side feed port, and obtaining PA6 / ABS alloy material through melting, extrusion and granulation; wherein the barrel temperature of the parallel twin-screw extruder is 160°C for zone 1, 180°C for zone 2, 190°C for zone 3, 200°C for zone 4, 210°C for zone 5, 220°C for zone 6, and 210°C for the die head, the screw speed is 500r / min, the melt pressure is 1.0MPa, and the vacuum degree is -0.06MPa.

[0055] S3, the same as S3 in Example 1;

[0056] Example 4

[0057] S1: Weigh 70 parts of PA6 resin, 30 parts of ABS resin, 5 parts of ABS-MAH and 1 part of additive, and stir them at a speed of 500 r / min for 10 minutes using a high-speed mixer to obtain a uniformly mixed material.

[0058] S2, the same as S2 in Example 3;

[0059] S3, the same as S3 in Example 1;

[0060] Example 5

[0061] S1: Weigh 80 parts of PA6 resin, 20 parts of ABS resin, 5 parts of ABS-MAH, and 1 part of additive, and stir them at a speed of 500 r / min for 10 minutes using a high-speed mixer to obtain a uniformly mixed material.

[0062] S2, the same as S2 in Example 3;

[0063] S3, the same as S3 in Example 1;

[0064] Comparative Example 1

[0065] S1: Weigh 60 parts of PA6 resin, 40 parts of ABS resin and 1 part of additive, and stir them at a speed of 500 r / min for 10 minutes using a high-speed mixer to obtain a uniformly mixed material.

[0066] S2, feeding the evenly mixed materials into the main material port of a parallel twin-screw extruder, and obtaining a PA6 / ABS alloy material through melting, extrusion and granulation; wherein the barrel temperature of the parallel twin-screw extruder is 160°C for zone 1, 180°C for zone 2, 190°C for zone 3, 200°C for zone 4, 210°C for zone 5, 220°C for zone 6, and 210°C for the die head, the screw speed is 500r / min, the melt pressure is 1.0MPa, and the vacuum degree is -0.06MPa.

[0067] S3, the same as S3 in Example 1;

[0068] Comparative Example 2

[0069] S1: Weigh 60 parts of PA6 resin, 40 parts of ABS resin, 5 parts of ABS-MAH and 1 part of additive, and stir them at a speed of 500 r / min for 10 minutes using a high-speed mixer to obtain a uniformly mixed material.

[0070] S2, the same as S2 in Comparative Example 1;

[0071] S3, the same as S3 in Example 1;

[0072] Comparative Example 3

[0073] S1: the same as S1 in Comparative Example 1;

[0074] S2, feeding the uniformly mixed materials into the main feed port of a parallel twin-screw extruder, adding 40 parts of unmodified glass fibers from the side feed port, and obtaining PA6 / ABS alloy material through melting, extrusion and granulation; wherein the barrel temperature of the parallel twin-screw extruder is 160°C for zone 1, 180°C for zone 2, 190°C for zone 3, 200°C for zone 4, 210°C for zone 5, 220°C for zone 6, and 210°C for the die head, the screw speed is 500r / min, the melt pressure is 1.0MPa, and the vacuum degree is -0.06MPa.

[0075] S3, the same as S3 in Example 1;

[0076] The formulation design is shown in Table 1.

[0077] Table 1 Glass fiber modified PA6 / ABS alloy material formula design table

[0078]

[0079]

[0080] The glass fiber modified PA6 / ABS alloy materials prepared in Examples 1 to 5, Comparative Examples 1 and 2 were tested for tensile properties, bending properties and impact properties according to ISO standards. The test results are shown in Table 2;

[0081] Table 2 Mechanical properties test table of long chopped glass fiber modified PA6 / ABS alloy material

[0082]

[0083] It can be seen from the above table that the impact strength of PA6 / ABS alloy material is significantly increased with the addition of modified glass fiber. With the increase of glass fiber content, the impact strength of PA6 / ABS alloy material is further increased, and the tensile strength, flexural strength and flexural modulus are significantly improved, thus meeting the application of the material in more extreme environments.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A chopped glass fiber modified PA6 / ABS alloy material, characterized in that: It includes the following raw materials in parts by weight: The preparation method of the modified glass fiber comprises the following steps: mixing glycidyl methacrylate and glass fiber, and adding hydrofluoric acid; then vacuuming, heating and drying, and then cooling to room temperature to obtain the modified glass fiber.

2. The chopped glass fiber modified PA6 / ABS alloy material according to claim 1, characterized in that: The compatibilizer is ABS-MAH.

3. The chopped glass fiber modified PA6 / ABS alloy material according to claim 1, characterized in that: The mass ratio of the glycidyl methacrylate, the glass fiber and the hydrofluoric acid is 6:20:

1.

4. The chopped glass fiber modified PA6 / ABS alloy material according to claim 1, characterized in that: The chopped glass fiber is one or more of alkali-free glass fiber, medium-alkali glass fiber and high-strength glass fiber.

5. The chopped glass fiber modified PA6 / ABS alloy material according to claim 1, characterized in that: The fiber length of the chopped glass fibers is 10 to 20 mm, and the fiber diameter is 5 to 24 μm.

6. The glass fiber modified PA6 / ABS alloy material according to claim 1, characterized in that: It also includes antioxidants, auxiliary antioxidants, light absorbers and light stabilizers.

7. The glass fiber modified PA6 / ABS alloy material according to claim 6, characterized in that: The antioxidant is a hindered phenol antioxidant, the auxiliary antioxidant is a phosphite antioxidant, the light absorber is a benzotriazole light absorber, and the light stabilizer is a hindered amine light stabilizer.

8. The glass fiber modified PA6 / ABS alloy material according to claim 6, characterized in that: The mass ratio of the antioxidant, the auxiliary antioxidant, the light absorber and the light stabilizer is 1:1:1:

1.

9. A method for preparing a chopped glass fiber modified PA6 / ABS alloy material, characterized in that: The following steps are involved: 60-80 parts by weight of PA6 resin, 20-40 parts by weight of ABS resin and 5 parts by weight of compatibilizer are mixed and fed into the main feeding port of a parallel twin-screw extruder, and 20-40 parts by weight of glass fiber are added from the side feeding port. The glass fiber-modified PA6 / ABS alloy material is obtained by melting, extruding and granulating.

10. The method for preparing the glass fiber modified PA6 / ABS alloy material according to claim 8, characterized in that: The barrel temperature of the parallel twin-screw extruder is 160°C in zone 1, 180°C in zone 2, 190°C in zone 3, 200°C in zone 4, 210°C in zone 5, 220°C in zone 6, and 210°C in the head; the screw speed is 500r / min, the melt pressure is 1.0MPa, the vacuum degree is -0.06MPa, the barrel temperature of the injection molding machine is 260°C, and the mold temperature is 60°C.

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