Modified ABS (Acrylonitrile Butadiene Styrene) resin and preparation method thereof

Abstract

The invention discloses modified ABS (acrylonitrile-butadiene-styrene) resin and a preparation method thereof, belongs to the technical field of helmet accessories, is particularly suitable for a helmet inner membrane buffer layer, and has long-acting fragrance volatilization and odor suppression functions. The modified ABS resin is prepared from the following components in parts by weight: 20-30 parts of ABS resin and 0.05-1 part of spice, and the spice is preferably selected from one or more of resina liquidamberis, benzoin or clove oil. According to the technical scheme, in the injection molding process of the helmet inner film buffer layer, the perfume is added into the ABS resin in an injection molding mode, and the long-acting fragrance volatilization and odor suppression effect can be achieved; meanwhile, through experimental verification, along with the increase of wearing temperature, the volatilization amount of the perfume is more, so that the perfume volatilization effect is better, and the temperature tendency of mosquitoes is more adapted; and volatilization of the perfume can be reduced in a low-temperature state, so that the use time is ensured. The spice is small in addition amount, low in manufacturing cost and long in volatilization aging, and a good using effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of helmets, and in particular to a modified ABS resin and a preparation method thereof. Background Art

[0002] Helmets, as equipment for protecting the head, are widely used in the fields of construction, cycling, electric bicycles, motorcycles, etc. Especially in recent years, with the continuous increase in personal travel needs and the acceleration of riding speed, the demand for wearing helmets has been growing.

[0003] Existing helmets primarily consist of an outer shell, an inner cushioning layer, and a suspension device. When worn, they cover at least the top of the head, preventing casualties from impacting the ground in the event of a fall, providing excellent protection. However, existing helmets lack the ability to dissipate fragrance and suppress odors. When worn for extended periods or by multiple people, unpleasant odors can form within the helmet as bodily fluids evaporate and ferment. Locally spraying liquids like perfume to mask odors fails to achieve long-term effectiveness, is complex, and is costly.

[0004] Therefore, how to provide a modified ABS resin with long-lasting fragrance and odor-suppressing effects as the inner membrane buffer layer of a helmet is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] To this end, the present invention provides a modified ABS resin and a preparation method thereof to solve the related technical problems existing in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] According to a first aspect of the present invention, there is provided a modified ABS resin comprising the following components in parts by weight:

[0008] 20-30 parts of ABS resin

[0009] 0.05-1 part of spices.

[0010] Further, the following components are included in parts by weight:

[0011] 25 parts of ABS resin

[0012] 0.05-1 part of spices.

[0013] Furthermore, the spices are one or more of maple balsam, benzoin or clove oil.

[0014] According to a second aspect of the present invention, there is provided a method for preparing a modified ABS resin, comprising the following steps:

[0015] 1) Weighing ABS resin and fragrance according to the proportion, screening and drying them, and mixing them for later use;

[0016] 2) Put the raw materials into the injection molding machine for screw extrusion;

[0017] 3) The mold is closed to form a closed cavity. The molten plastic is injected into the mold cavity through the nozzle under high pressure and the pressure is maintained;

[0018] 4) Cooling the mold and opening the mold to obtain the inner membrane buffer layer of the injection-molded helmet;

[0019] 5) The helmet inner membrane buffer layer is polished and burred to obtain a finished product.

[0020] Furthermore, in step 3), the injection pressure is 30-120 MPa and the maintenance time is 30-40 s.

[0021] Furthermore, in step 3), the pressure is maintained at 40-110 MPa for 40-60 seconds.

[0022] Furthermore, in step 4), the cooling temperature is 10-25° C. and the cooling time is 3-6 minutes.

[0023] Furthermore, the method further includes 6), specifically: testing the aroma and odor suppression performance of the helmet inner membrane buffer layer.

[0024] The present invention has the following advantages:

[0025] According to the technical solution of the present invention, during the injection molding process of the helmet's inner membrane buffer layer, fragrance is injected into the ABS resin, achieving a long-lasting aroma and odor suppression effect. Experiments have also verified that as the wearing temperature increases, the fragrance evaporates more, achieving a better aroma and odor suppression effect, and being more adaptable to temperature trends. At low temperatures, fragrance volatilization is reduced, ensuring a longer wear time. This application utilizes a small amount of fragrance, is low-cost, and provides a long-lasting aroma and odor suppression effect, achieving excellent performance. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0027] According to a first aspect of the present invention, there is provided a modified ABS resin comprising the following components in parts by weight:

[0028] 20-30 parts of ABS resin

[0029] 0.05-1 part of spices.

[0030] Further, the following components are included in parts by weight:

[0031] 25 parts of ABS resin

[0032] 0.05-1 part of spices.

[0033] Furthermore, the spices are one or more of maple balsam, benzoin or clove oil.

[0034] According to a second aspect of the present invention, there is provided a method for preparing a modified ABS resin, comprising the following steps:

[0035] 1) Weighing ABS resin and fragrance according to the proportion, screening and drying them, and mixing them for later use;

[0036] 2) Put the raw materials into the injection molding machine for screw extrusion;

[0037] 3) The mold is closed to form a closed cavity. The molten plastic is injected into the mold cavity through the nozzle under high pressure and the pressure is maintained;

[0038] 4) Cooling the mold and opening the mold to obtain the inner membrane buffer layer of the injection-molded helmet;

[0039] 5) The helmet inner membrane buffer layer is polished and burred to obtain a finished product.

[0040] Furthermore, in step 3), the injection pressure is 30-120 MPa and the maintenance time is 30-40 s.

[0041] Furthermore, in step 3), the pressure is maintained at 40-110 MPa for 40-60 seconds.

[0042] Furthermore, in step 4), the cooling temperature is 10-25° C. and the cooling time is 3-6 minutes.

[0043] Furthermore, the method further includes 6), specifically: testing the aroma and odor suppression performance of the helmet inner membrane buffer layer.

[0044] The following describes the effects of the present application in conjunction with specific embodiments.

[0045] Example 1

[0046] A method for preparing a modified ABS resin comprises the following steps:

[0047] Raw material preparation: Weigh 25 parts of ABS resin and 0.05 parts of maple balsam, pass them through an 80-mesh sieve respectively, and dry them at 60°C for 2 hours to remove moisture.

[0048] Mixing process: Place the dried ABS resin and maple balsam into a high-speed mixer and mix at 800r / min for 5 minutes to ensure uniform dispersion.

[0049] Injection molding: Add the mixed material into the hopper of the injection molding machine, set the screw temperature to 180-220℃, the injection pressure to 80MPa, maintain the pressure at 50MPa, and maintain the time for 40s.

[0050] Mold cooling: Cool the injection-molded helmet inner membrane buffer layer at 20°C for 5 minutes, open the mold and take out the product.

[0051] Post-processing: Grind and remove burrs to obtain the finished product.

[0052] Example 2

[0053] The difference from Example 1 is that: the fragrance is 0.5 parts of benzoin, the injection pressure is adjusted to 100 MPa, the cooling temperature is 15° C., and the cooling time is 4 minutes.

[0054] Example 3

[0055] The difference from Example 1 is that the fragrance is 1 part of clove oil, the injection pressure is 120 MPa, the holding pressure is 110 MPa, the holding time is 60 s, the cooling temperature is 10° C., and the cooling time is 6 minutes.

[0056] Example 4

[0057] The difference from Example 1 is that the spices are 0.03 parts of maple balsam and 0.02 parts of clove oil (total amount 0.05 parts), the injection pressure is 30 MPa, the cooling temperature is 25° C., and the cooling time is 3 minutes.

[0058] Example 5

[0059] The difference from Example 1 is that the spices are 0.5 parts of maple balsam and 0.5 parts of benzoin (total amount is 1 part), the injection pressure is 40 MPa, the cooling temperature is 18° C., and the cooling time is 5 minutes.

[0060] Experimental data

[0061] 1. Effect of temperature on volatilization rate

[0062] The volatilization rate (mg / h) of the fragrance was tested at different temperatures (20°C, 30°C, 40°C). The results are shown in Table 2 below:

[0063]

[0064]

[0065] The above experimental data demonstrates that the volatilization rate of spices increases significantly with increasing temperature. At 40°C, the volatilization rate is 3-5 times that of 20°C, meeting the requirements of high-temperature summer environments. The volatilization rate of mixed spices is higher than that of single spices (e.g., Example 5 vs. Example 3), demonstrating that the synergistic effect of multiple spices can enhance volatilization.

[0066] 2. Mechanical properties test

[0067] According to GB / T 1040-2018, the tensile strength (MPa) and impact strength (kJ / m 2 ), and compared with pure ABS resin:

[0068] Example Tensile strength (MPa) <![CDATA[Impact strength (kJ / m 2 )]]> 1 42 18 2 41 17 3 40 17 4 43 18 5 39 16 Pure ABS 45 20

[0069] The above experimental results show that the addition of spices has little effect on the mechanical properties:

[0070] The tensile strength decreases by 2-13% (pure ABS 45MPa → modified ABS 39-43MPa).

[0071] Impact strength decreases by 10-20% (pure ABS 20kJ / m 2 →Modified ABS16-18kJ / m 2 ).

[0072] Low addition amount (0.05 parts) has the least effect on the mechanical properties (such as Examples 1 and 4), and still meets the requirements of the helmet cushioning layer.

[0073] When the addition amount is high (1 part), the mechanical properties are slightly reduced (such as in Examples 3 and 5), but still meet the industry standards (generally, the ABS requirements for helmets are tensile strength ≥35MPa and impact strength ≥15kJ / m 2 ).

[0074] 3. Summary

[0075] Temperature adaptability: The volatilization rate increases significantly at high temperatures (40°C), meeting the needs of summer riding; at low temperatures (20°C), the volatilization slows down, extending the service life.

[0076] Mechanical properties: When the amount of fragrance added is ≤1 part, the mechanical properties still meet the helmet safety standards and do not affect the protective function.

[0077] According to the technical solution of the present invention, fragrance is added to the ABS resin during the injection molding process of the helmet's inner membrane buffer layer, achieving a long-lasting aroma and odor suppression effect. Experimental verification also shows that as the wearing temperature increases, the fragrance evaporates more, achieving a better aroma and odor suppression effect, which is more suitable for the temperature trend of the fragrance. At low temperatures, the fragrance's volatilization is reduced, ensuring a longer service life. This application achieves excellent performance with a low fragrance dosage, low cost, and long-lasting effectiveness.

[0078] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A modified ABS resin, characterized in that: The composition comprises the following components in parts by weight: 20-30 parts of ABS resin 0.05-1 part of spices.

2. The modified ABS resin according to claim 1, wherein The composition comprises the following components in parts by weight: 25 parts of ABS resin 0.05-1 part of spices.

3. The modified ABS resin according to claim 1 or 2, wherein The spices are one or more of maple balsam, benzoin or clove oil.

4. A method for preparing a modified ABS resin, characterized in that: The steps include: 1) Weighing ABS resin and fragrance according to the proportion, screening and drying them, and mixing them for later use; 2) Put the raw materials into the injection molding machine for screw extrusion; 3) The mold is closed to form a closed cavity. The molten plastic is injected into the mold cavity through the nozzle under high pressure and the pressure is maintained; 4) Cooling the mold and opening the mold to obtain the inner membrane buffer layer of the injection-molded helmet; 5) The helmet inner membrane buffer layer is polished and burred to obtain a finished product.

5. The method for preparing the modified ABS resin according to claim 4, wherein: in, In step 3), the injection pressure is 30-120 MPa and the holding time is 30-40 s.

6. The method for preparing the modified ABS resin according to claim 4, wherein: in, In step 3), the pressure is maintained at 40-110 MPa for 40-60 seconds.

7. The method for preparing the modified ABS resin according to claim 4, wherein: in, In step 4), the cooling temperature is 10-25° C. and the cooling time is 3-6 minutes.

8. The method for preparing the modified ABS resin according to claim 4, wherein: The invention also includes 6), specifically: conducting volatility performance testing on the inner membrane buffer layer of the helmet.

Images