Polymer material for plastic anchor bolt and plastic anchor bolt

Abstract

The invention relates to the technical field of plastic anchor bolts, and proposes a polymer material for plastic anchor bolts and a plastic anchor bolt. The polymer material for plastic anchor bolts comprises the following raw materials in parts by weight: 50-70 parts of polyamide resin, 10-25 parts of polymethyl methacrylate, 20-30 parts of glass fiber, 1-3 parts of compatibilizer, 1-2 parts of lubricant, and 0.5-1 part of antioxidant; the mass ratio of polyamide resin to polymethyl methacrylate is 2-7:1. Through the above technical solution, the problem of poor mechanical properties of plastic anchor bolts in the related art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic anchor bolts, and in particular to a polymer material for plastic anchor bolts and a plastic anchor bolt. Background Art

[0002] In the field of modern construction, the exterior wall insulation system plays a vital role in improving the energy efficiency of buildings, improving indoor thermal comfort, and reducing building operating costs. With the continuous improvement of building energy-saving requirements, exterior wall insulation technology is also continuously developing and innovating. As a key fixing component in the exterior wall insulation system, the development history of plastic anchor bolts is closely linked to the evolution of exterior wall insulation technology. Plastic anchor bolts are composed of screws and plastic expansion tubes with discs, and the material of the plastic expansion tubes with discs is a polymer material. Plastic anchor bolts not only need to bear the deadweight of insulation materials, but also need to bear external forces such as wind loads and seismic loads. If the tensile bearing capacity is insufficient, the plastic anchor bolts may be pulled out or broken, resulting in safety accidents such as the falling off and instability of insulation materials, threatening the safety of people and property in the building. Therefore, it is necessary to improve the mechanical properties of plastic anchor bolts to meet the needs of fixing different building structures and materials and expand the application scope of plastic anchor bolts. Summary of the invention

[0003] The invention provides a polymer material for a plastic anchor and a plastic anchor, which solves the problem of poor mechanical properties of the plastic anchor in the related art.

[0004] The technical solution of the present invention is as follows:

[0005] The invention provides a polymer material for a plastic anchor bolt, comprising the following raw materials in parts by weight: 50-70 parts of a polyamide resin, 10-25 parts of polymethyl methacrylate, 20-30 parts of glass fiber, 1-3 parts of a compatibilizer, 1-2 parts of a lubricant, and 0.5-1 parts of an antioxidant; the mass ratio of the polyamide resin to the polymethyl methacrylate is 2-7:1.

[0006] As a further technical solution, the polymethyl methacrylate consists of a first polymethyl methacrylate and a second polymethyl methacrylate, and the first polymethyl methacrylate and the second polymethyl methacrylate have different melting indexes.

[0007] As a further technical solution, the melt index of the first polymethyl methacrylate is 1.6 g / 10 min, and the melt index of the second polymethyl methacrylate is 12.5 g / 10 min.

[0008] As a further technical solution, the mass ratio of the first polymethyl methacrylate to the second polymethyl methacrylate is 6:1-3.

[0009] In the present invention, the mechanical properties of the polymer material for plastic anchor bolts are further improved by limiting the mass ratio of the first polymethyl methacrylate to the second polymethyl methacrylate to 6:1-3.

[0010] As a further technical solution, the glass fiber is a modified glass fiber, and the raw materials of the modified glass fiber include glass fiber and zinc lactate.

[0011] In the present invention, the modified glass fiber is prepared by using glass fiber and zinc lactate, thereby further improving the mechanical properties of the polymer material for the plastic anchor bolt.

[0012] As a further technical solution, the mass ratio of the glass fiber to the zinc lactate is 10:4-5.

[0013] In the present invention, the mass ratio of glass fiber to zinc lactate is limited to 10:4-5, thereby further improving the mechanical properties of the polymer material for plastic anchor bolts.

[0014] As a further technical solution, the method for preparing the modified glass fiber comprises the following steps:

[0015] A1. Mixing glass fiber and zinc lactate in a solvent, adjusting the pH to alkaline, and filtering to obtain pretreated glass fiber;

[0016] A2. The pretreated glass fiber is dried, calcined and crushed to obtain modified glass fiber.

[0017] As a further technical solution, the solvent is water.

[0018] As a further technical solution, the pH adjustment is specifically to adjust the pH to 9-11.

[0019] As a further technical solution, in step A1, the reagent used for adjusting the pH is ammonia water.

[0020] As a further technical solution, the calcination temperature is 150-180° C., and the calcination time is 4-6 hours.

[0021] As a further technical solution, the antioxidant includes one or more of antioxidant 1098, antioxidant 168, and antioxidant BHT.

[0022] As a further technical solution, the compatibilizer is maleic anhydride grafted polyethylene.

[0023] As a further technical solution, the lubricant includes one or both of stearic acid and calcium stearate.

[0024] The present invention further provides a plastic anchor bolt, comprising a screw and a plastic expansion tube with a disc, wherein the material of the plastic expansion tube with a disc is a polymer material for the plastic anchor bolt.

[0025] As a further technical solution, the method for preparing the plastic expansion tube with a disc comprises the following steps:

[0026] The plastic anchor is mixed with a polymer material raw material and then extruded to obtain a plastic expansion tube with a disc.

[0027] The working principle and beneficial effects of the present invention are:

[0028] In the present invention, polyamide resin is used as a base material, polymethyl methacrylate is added to the polyamide, and the mass ratio of the polyamide resin to the polymethyl methacrylate is limited to 2-7:1, thereby improving the mechanical properties of the polymer material for the plastic anchor bolt. When the plastic expansion tube with a disc is made and applied to the plastic anchor bolt, the stability of the plastic anchor bolt in a complex stress environment can be improved. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0030] In the following embodiments and comparative examples:

[0031] Polyamide resin, model: PA66 79G13HSL; polymethyl methacrylate IF850, melt index: 12.5g / 10min (230℃, 3.8kg); polymethyl methacrylate SX-306, melt index: 1.6g / 10min (230℃, 3.8kg); maleic anhydride grafted polyethylene, model: Fusabond E589; glass fiber, diameter of 9~13μm, length of 50~300μm.

[0032] Example 1

[0033] A method for preparing a plastic expansion tube with a disc for a plastic anchor bolt comprises the following steps:

[0034] 50 parts of polyamide resin, 25 parts of polymethyl methacrylate IF850, 20 parts of glass fiber, 1 part of maleic anhydride grafted polyethylene, 1 part of stearic acid, and 0.5 part of antioxidant 1098 were mixed and extruded to obtain a plastic expansion tube with a disc for a plastic anchor.

[0035] Example 2

[0036] A method for preparing a plastic expansion tube with a disc for a plastic anchor bolt comprises the following steps:

[0037] 60 parts of polyamide resin, 15 parts of polymethyl methacrylate IF850, 25 parts of glass fiber, 2 parts of maleic anhydride grafted polyethylene, 1 part of stearic acid, and 0.7 parts of antioxidant 168 were mixed and extruded to obtain a plastic expansion tube with a disc for a plastic anchor.

[0038] Example 3

[0039] A method for preparing a plastic expansion tube with a disc for a plastic anchor bolt comprises the following steps:

[0040] 70 parts of polyamide resin, 10 parts of polymethyl methacrylate IF850, 30 parts of glass fiber, 3 parts of maleic anhydride grafted polyethylene, 2 parts of calcium stearate and 1 part of antioxidant BHT were mixed and extruded to obtain a plastic expansion tube with a disc for a plastic anchor.

[0041] Example 4

[0042] The only difference between this embodiment and embodiment 1 is that polymethyl methacrylate IF850 is replaced by an equal amount of polymethyl methacrylate SX-306.

[0043] Example 5

[0044] The only difference between this embodiment and embodiment 1 is that polymethyl methacrylate IF850 is replaced by equal amounts of polymethyl methacrylate SX-306 and polymethyl methacrylate IF850 in a mass ratio of 8:1.

[0045] Example 6

[0046] The only difference between this embodiment and embodiment 5 is that the mass ratio of polymethyl methacrylate SX-306 and polymethyl methacrylate IF850 is 1:1.

[0047] Example 7

[0048] The only difference between this embodiment and embodiment 5 is that the mass ratio of polymethyl methacrylate SX-306 to polymethyl methacrylate IF850 is 6:1.

[0049] Example 8

[0050] The only difference between this embodiment and embodiment 5 is that the mass ratio of polymethyl methacrylate SX-306 to polymethyl methacrylate IF850 is 2:1.

[0051] Example 9

[0052] The difference between this embodiment and embodiment 7 is that the glass fiber is replaced by an equal amount of modified glass fiber;

[0053] The preparation method of modified glass fiber comprises the following steps:

[0054] A1. Mix 50 g of glass fiber and 10 g of zinc lactate in 500 mL of water, add 5 wt % of ammonia water to adjust the pH to 10, and filter to obtain a precipitate;

[0055] A2. After drying the precipitate, calcine it at 150°C for 6 hours and grind it to obtain modified glass fiber.

[0056] Example 10

[0057] The only difference between this embodiment and embodiment 9 is that the added amount of zinc lactate is 50 g.

[0058] Embodiment 11

[0059] The only difference between this embodiment and embodiment 9 is that the added amount of zinc lactate is 20 g.

[0060] Example 12

[0061] The only difference between this embodiment and embodiment 9 is that the added amount of zinc lactate is 25 g.

[0062] Comparative Example 1

[0063] The only difference between this comparative example and Example 1 is that polymethyl methacrylate IF850 is not added.

[0064] The plastic anchor bolts prepared in Examples 1 to 12 and Comparative Example 1 were combined with a disc-shaped plastic expansion tube and a steel nail to obtain a plastic anchor bolt. The standard value of the tensile bearing capacity of the anchor bolts on the ordinary concrete base wall was tested according to the test method in JG / T 366-2012 "Anchor bolts for exterior wall insulation". The test results are shown in Table 1.

[0065] Table 1 Test results of plastic anchor performance

[0066]

[0067] Compared with Comparative Example 1, polymethyl methacrylate IF850 was added in Example 1, and the standard value of the tensile bearing capacity of the plastic anchor bolt obtained was higher than that of Comparative Example 1, indicating that the addition of polymethyl methacrylate can improve the mechanical properties of the plastic anchor bolt.

[0068] Compared with Example 1 and Example 4, polymethyl methacrylate IF850 and polymethyl methacrylate SX-306 were added simultaneously in Examples 5 to 8. As a result, the standard values ​​of tensile bearing capacity of the plastic anchors prepared in Examples 5 to 8 were higher than those in Example 1 and Example 4, indicating that the simultaneous addition of polymethyl methacrylate IF850 and polymethyl methacrylate SX-306 can further improve the mechanical properties of the plastic anchors. By comparing Examples 5 to 8, it was found that the standard values ​​of tensile bearing capacity of the plastic anchors prepared in Examples 7 to 8 were higher than those in Example 5 and Example 6, indicating that when the mass ratio of polymethyl methacrylate SX-306 to polymethyl methacrylate IF850 was 6:1 to 3, the mechanical properties of the obtained plastic anchors were higher.

[0069] Compared with Example 7, modified glass fibers were used in Examples 9 to 12. As a result, the standard values ​​of tensile bearing capacity of the plastic anchors prepared in Examples 9 to 12 were higher than those in Example 7, indicating that the use of modified glass fibers can further improve the mechanical properties of the plastic anchors. By comparing Examples 9 to 12, it was found that the standard values ​​of tensile bearing capacity of the plastic anchors prepared in Examples 11 to 12 were higher than those in Examples 9 to 10, indicating that when the mass ratio of glass fiber to zinc lactate in the modified glass fiber is 10:4 to 5, the mechanical properties of the plastic anchors can be further improved.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polymer material for plastic anchor bolts, characterized in that: The raw materials include the following components in parts by weight: 50-70 parts of polyamide resin, 10-25 parts of polymethyl methacrylate, 20-30 parts of glass fiber, 1-3 parts of compatibilizer, 1-2 parts of lubricant, and 0.5-1 parts of antioxidant; the mass ratio of the polyamide resin to the polymethyl methacrylate is 2-7:1; The glass fiber is a modified glass fiber, and the raw materials of the modified glass fiber include glass fiber and zinc lactate; The preparation method of the modified glass fiber comprises the following steps: A1. Mixing glass fiber and zinc lactate in a solvent, adjusting the pH to alkaline, and filtering to obtain pretreated glass fiber; A2, the pretreated glass fiber is dried, calcined and crushed to obtain modified glass fiber; The polymethyl methacrylate is IF850 or is composed of IF850 and SX-306. The melting index of the IF850 is 12.5 g / 10 min; the melting index of the SX-306 is 1.6 g / 10 min.

2. The polymer material for plastic anchor according to claim 1, characterized in that: The mass ratio of SX-306 to IF850 is 6:1-3.

3. The polymer material for plastic anchor according to claim 1, characterized in that: The mass ratio of the glass fiber to the zinc lactate is 10:4-5.

4. The polymer material for plastic anchor according to claim 1, characterized in that: The pH adjustment specifically includes adjusting the pH to 9-11.

5. The polymer material for plastic anchor according to claim 1, characterized in that: The antioxidant includes one or more of antioxidant 1098, antioxidant 168, and antioxidant BHT.

6. A plastic anchor bolt, characterized in that: It comprises a screw and a plastic expansion tube with a disc, wherein the material of the plastic expansion tube with a disc is the polymer material for plastic anchors as claimed in any one of claims 1 to 5.

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