CN116041896A - Wear-resistant high-elasticity wheel skin of luggage and preparation method thereof - Google Patents

Wear-resistant high-elasticity wheel skin of luggage and preparation method thereof Download PDF

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CN116041896A
CN116041896A CN202310139753.XA CN202310139753A CN116041896A CN 116041896 A CN116041896 A CN 116041896A CN 202310139753 A CN202310139753 A CN 202310139753A CN 116041896 A CN116041896 A CN 116041896A
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parts
wear
resistant
luggage
carbon black
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CN116041896B (en
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朱锦媚
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Dongguan Lijun Polymer Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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Abstract

The application relates to the field of case wear-resistant materials, and particularly discloses a case wear-resistant high-elasticity wheel skin and a preparation method thereof, wherein the case wear-resistant high-elasticity wheel skin comprises 35-55 parts of modified star-shaped SEBS, 15-25 parts of polypropylene resin, 20-40 parts of mineral oil, 18-28 parts of modified carbon black, 1-3 parts of wear-resistant auxiliary agent and 0.2-1 part of antioxidant; the preparation method comprises the following steps: s1, adding modified star-shaped SEBS, polypropylene resin and mineral oil into reaction equipment to prepare a mixture I; s2, adding modified carbon black, an abrasion-resistant auxiliary agent and an antioxidant into the mixture I to prepare a mixture II; s3, melting and mixing the mixture II in an injection molding machine, and then extruding and molding to obtain the wear-resistant high-elasticity luggage wheel cover; the wear-resistant high-elasticity wheel skin of the luggage manufactured by the method has good wear resistance and rebound resilience, and has good shock absorption and protection effects on the luggage.

Description

Wear-resistant high-elasticity wheel skin of luggage and preparation method thereof
Technical Field
The application relates to the field of wear-resistant materials for bags, in particular to a wear-resistant high-elasticity wheel skin for bags and a preparation method thereof.
Background
The suitcase is what we daily packing thing and trip are indispensable, and the suitcase is in daily use's in-process, the wheel skin of case wheel produces friction with ground contact for a long time for the wearing and tearing appear easily on wheel skin surface, and then make the case wheel of suitcase damage, the wheel skin of the case wheel of general use can add some inorganic filler in order to promote the wearability of wheel skin, but the addition of inorganic filler makes the wheel skin become harder, frictional sound is very big when contacting with ground, the wearability is lower and to the shock attenuation protection effect of suitcase reduction.
Disclosure of Invention
In order to solve the problems that the wear resistance of the wheel skin of the luggage wheel of the luggage is low and the shock absorption and protection effects on the luggage are low, the application provides a wear-resistant high-elasticity wheel skin of the luggage and a preparation method thereof.
In a first aspect, the application provides a wear-resistant high-elasticity wheel skin of a case, which adopts the following technical scheme:
the wear-resistant high-elasticity wheel skin of the luggage is prepared from the following raw materials in parts by weight:
35-55 parts of modified star-shaped SEBS
15-25 parts of polypropylene resin
20-40 parts of mineral oil
18-28 parts of modified carbon black
1-3 parts of wear-resistant auxiliary agent
0.2-1 part of antioxidant.
By adopting the technical scheme, the modified star-shaped SEBS and the polypropylene resin are used as a resin system, the mineral oil is used as a plasticizer and a system regulator, the modified carbon black is added into the system to serve as a performance reinforcing agent, and the wear-resistant auxiliary agent and the antioxidant are added into the system, so that the mechanical property, wear resistance and oxidation resistance of the prepared luggage wheel skin are improved, the prepared luggage wheel skin has better hardness and wear resistance, and also has better rebound resilience, is durable and not easy to damage, and has better shock absorption and protection effects on the luggage.
The modified star-shaped SEBS is formed by polymerizing ethylene and butylene structures of a soft section and a styrene structure of a hard section, has good mechanical property and elastic property, does not contain unsaturated double bonds in molecules, has good stability and ageing resistance, and has good molecular toughness, so that the modified star-shaped SEBS and the polypropylene resin are used as a resin system to prepare the luggage wheel cover with good toughness and elasticity, and the mineral oil is used as a plasticizer and a system regulator, so that the modified star-shaped SEBS and the polypropylene resin can fully absorb the mineral oil, the flowability and the processing property of the resin system are improved, the carbon black is used as a reinforcing agent, the mechanical property and the wear resistance of the prepared carbon black can be improved, and meanwhile, the carbon black and an antioxidant can form a synergistic system, so that the ageing resistance of the prepared luggage wheel cover is further improved.
Preferably, the modified star-shaped SEBS is prepared by the following steps:
a1, adding 45-65 parts of star-shaped SEBS and 6-12 parts of turpentine into reaction equipment according to parts by weight, stirring at 100-120 ℃ for 3-4 hours to prepare a mixture I;
a2, adding 10-15 parts of calcium carbonate, 3-6 parts of triisostearyl isopropyl titanate and 1-3 parts of maleic anhydride into the mixture I prepared in the step A1, heating to 155-175 ℃ for reaction, extruding and granulating after reacting for 1-2 hours to prepare the modified star SEBS.
By adopting the technical scheme, the modified star-shaped SEBS with better rebound resilience and flexibility is prepared, firstly, the star-shaped SEBS and turpentine are mixed at a better temperature, so that the star-shaped SEBS absorbs oil and softens in the turpentine to prepare a mixture I, maleic anhydride and triisostearyl isopropyl titanate are added into the mixture I for melt grafting, the compatibility and rebound resilience of the prepared modified star-shaped SEBS in a system are improved, calcium carbonate has a reinforcing effect on the star-shaped SEBS, and the flexibility of the prepared modified star-shaped SEBS is improved; compared with the common star SEBS, the modified star SEBS prepared by the method has better flexibility and rebound resilience, and has better compatibility with a system, and the prepared luggage wheel skin has better flexibility and rebound resilience.
Preferably, the polypropylene resin is composed of isotactic polypropylene resin and syndiotactic polypropylene resin with the dosage ratio of 1 (0.3-0.5).
Through adopting above-mentioned technical scheme, isotactic polypropylene resin's structure is regular, and intensity is high, but its brittleness is great, and impact resistance is lower, and syndiotactic polypropylene resin has reduced molecular structure's regularity, has better shock resistance and toughness, regard isotactic polypropylene resin and syndiotactic polypropylene resin of preferred proportion as polypropylene resin, can promote the impact resistance and the toughness of the luggage wheel skin of making, and then promote the durability of the luggage wheel skin of making.
In a specific embodiment, the isotactic polypropylene resin and syndiotactic polypropylene resin may be used in a ratio of 1:0.3, 1:0.35, 1:0.4, 1:0.45 or 1:0.5.
Preferably, the modified carbon black is prepared by the steps of:
b1, soaking 6-8 parts of carbon black in 10-12 parts of a soaking agent in parts by weight, stirring and soaking for 4-5 hours, and drying after soaking to obtain pretreated carbon black;
b2, adding 1-2 parts of silane coupling agent KH-560 and 3-5 parts of ethanol aqueous solution with mass fraction of 60-80% into the pretreated carbon black prepared in the step B1, stirring and reacting at 40-50 ℃ for 2-3 hours, filtering and drying to prepare modified carbon black;
the soaking agent consists of the following raw materials in parts by weight: 15-25 parts of polyethylene glycol 400, 5-10 parts of fatty alcohol polyoxyethylene ether, 3-5 parts of sodium hexametaphosphate, 0.8-1.5 parts of citrate buffer solution with pH value of 4-5 and 40-50 parts of water.
By adopting the technical scheme, the modified carbon black with better dispersibility and reinforcing performance is prepared, firstly, the carbon black is soaked in a soaking agent, so that the carbon black is easy to disperse in a silane coupling agent KH-560 and an ethanol aqueous solution with the mass fraction of 60-80%, further, the subsequent surface modification of the carbon black is facilitated, the prepared modified carbon black has better binding force in modified star-shaped SEBS resin and polypropylene resin, and meanwhile, the carbon black is uniformly modified and grafted on the silane coupling agent KH-560 with a reticular structure, and is uniformly dispersed in a resin system, so that the hardness of the prepared wheel skin is further reduced, and meanwhile, the wear resistance and flexibility of the prepared wheel skin are improved.
The surface energy of the carbon black can be well reduced by adopting the soaking agent, the contact area of the carbon black and the silane coupling agent KH-560 in subsequent treatment is increased, the carbon black can be subjected to grafting reaction with the silane coupling agent KH-560 to a large extent, the compatibility and the binding force of the prepared modified carbon black and a resin system are improved, the prepared wheel skin has good wear resistance and good flexibility, the mineral oil is composed of paraffin oil and naphthenic oil with the dosage ratio of 1 (0.25-0.4), the paraffin oil is any one of 10# paraffin oil, 15# paraffin oil and 26# paraffin oil, and the naphthenic oil is any one of KN4006 naphthenic oil and KN4010 naphthenic oil.
By adopting the technical scheme, paraffin oil and naphthenic oil with a better proportion are added into the system as mineral oil, so that the oil absorption rate of the modified star-shaped SEBS and polypropylene resin can be improved, the paraffin oil and the naphthenic oil with a better proportion play a role in adjusting the hardness and the fluidity of the resin system, the plasticizing performance of the resin system can be further improved, and the mechanical property of the prepared luggage wheel skin is further improved.
In a specific embodiment, the paraffinic and naphthenic oils may be used in a ratio of 1:0.25, 1:0.3, 1:0.35, or 1:0.4.
Preferably, the wear-resistant auxiliary agent consists of Si-69 type silane coupling agent and glycidyl methacrylate with the dosage ratio of 1 (0.4-0.6).
By adopting the technical scheme, the Si-69 type silane coupling agent can improve the mechanical property and the wear resistance of the prepared luggage wheel skin, and can also improve the dispersion effect of the modified carbon black in a resin system, and the glycidyl methacrylate can perform interaction synergistic effect with polypropylene resin in the resin system, so that the toughness and the rebound resilience of the prepared luggage wheel skin are further improved, the Si-69 type silane coupling agent and the glycidyl methacrylate with a better proportion are used as wear-resistant auxiliary agents, and the Si-69 type silane coupling agent and the glycidyl methacrylate have synergistic effect to perform further reinforcing effect on the resin system, so that the prepared luggage wheel skin has better toughness and wear resistance, and also has better rebound resilience, in addition, the glycidyl methacrylate can improve the fluidity of the resin system, further improve the plasticizing performance of the resin system, and is convenient for processing and forming.
In a specific embodiment, the Si-69 type silane coupling agent and glycidyl methacrylate may be used in a ratio of 1:0.4, 1:0.45, 1:0.5, 1:0.55, or 1:0.6.
Preferably, the antioxidant consists of a hindered phenol antioxidant and a phosphite antioxidant in an amount ratio of 1 (0.2-0.4), wherein the hindered phenol antioxidant is any one of 1010 and 1076, and the phosphite antioxidant is any one of 618 and 626.
By adopting the technical scheme, the hindered phenol antioxidant and the resin system have better compatibility, the oxidation resistance of the resin system can be improved, and the phosphite antioxidant can decompose molecules with higher activity in the resin system into low-activity molecules, so that the oxidation effect of the resin system is reduced, and the hindered phenol antioxidant and the phosphite antioxidant with better proportion are used as antioxidants to generate better synergistic effect, thereby being beneficial to improving the stability of the resin system, ensuring that the prepared luggage wheel skin is not easy to oxidize, improving the ageing resistance of the luggage wheel skin, and ensuring that the luggage wheel skin is durable and not easy to damage.
In a specific embodiment, the ratio of hindered phenolic antioxidant to phosphite antioxidant may be 1:0.2, 1:0.25, 1:0.3, 1:0.35, or 1:0.4.
In a second aspect, the application provides a preparation method of a wear-resistant high-elasticity luggage wheel skin, which adopts the following technical scheme:
a preparation method of a wear-resistant high-elasticity wheel skin of a case comprises the following steps:
s1, adding modified star-shaped SEBS, polypropylene resin and mineral oil into reaction equipment, heating to 70-80 ℃, and stirring for 1-2 hours to obtain a mixture I;
s2, adding the modified carbon black, the wear-resistant auxiliary agent and the antioxidant into the mixture I, mixing and stirring for 1.5-2.5 hours, and uniformly stirring to obtain a mixture II;
and S3, melting and mixing the mixture II in an injection molding machine, and then extruding and molding to obtain the wear-resistant high-elasticity luggage wheel cover.
According to the technical scheme, firstly, the modified star-shaped SEBS, the polypropylene resin and the mineral oil are added into the reaction equipment, oil absorption can be fully carried out on the modified star-shaped SEBS and the polypropylene resin at a better temperature, the modified star-shaped SEBS and the polypropylene resin can be fully dispersed and uniformly mixed to obtain a mixture I with better hardness and fluidity, then, the modified carbon black, the wear-resistant additive and the antioxidant are added into the mixture I, so that the modified carbon black is uniformly and stably dispersed in the mixture I, meanwhile, the wear-resistant additive in the system, the modified carbon black and the polypropylene resin are further and stably dispersed at a better temperature to obtain a mixture II, and finally, the mixture II is subjected to melt mixing and extrusion molding to obtain the case wear-resistant high-elasticity wheel skin.
Preferably, the pressure in the step S1 is 2-6KPa, and the stirring speed is 700-1200r/min; the mixing temperature in the step S3 is 210-230 ℃, the mixing time is 2-3h, and the extrusion pressure is 0.3-0.8MPa.
By adopting the technical scheme, under the condition of better stirring speed and pressure, the modified star-shaped SEBS and the polypropylene resin can be fully wetted and uniformly dispersed in mineral oil; and in the step 3, under the condition of better temperature, the resin system can be uniformly and stably melt-blended to form a uniform melt-blended system, and under the effect of better extrusion pressure, the luggage wear-resistant high-elasticity wheel skin with uniform and stable surface is formed by extrusion.
In summary, the present application has the following beneficial effects:
1. the wear-resistant high-elasticity luggage wheel skin is characterized in that the modified star-shaped SEBS and polypropylene resin are used as a resin system, the modified carbon black is used as a performance reinforcing agent, a wear-resistant auxiliary agent and an antioxidant are compounded in the system, the prepared luggage wheel skin has good rebound performance and ageing resistance while having good hardness and wear resistance, friction sound is small when the luggage wheel skin is contacted with the ground, and the prepared luggage wheel skin is durable and has good shock absorption and protection effects on a luggage.
2. The modified star-shaped SEBS is used in the application, so that the luggage wheel skin with good flexibility and rebound resilience is prepared, and the shock absorption and protection effects on the luggage are improved.
3. According to the method, the modified carbon black is added to prepare the luggage wheel skin with good hardness and wear resistance, so that the service life of the luggage wheel skin can be prolonged.
4. According to the preparation method of the wear-resistant high-elasticity luggage wheel skin, firstly, modified star-shaped SEBS and polypropylene resin are enabled to absorb oil fully under specific conditions, then carbon black, wear-resistant auxiliary agents and antioxidants are added, so that all raw materials can be uniformly dispersed and blended, melt blending is carried out at specific temperature, and then uniform extrusion is carried out under specific pressure, so that the wear-resistant high-elasticity luggage wheel skin with stable performance and uniform molding is prepared.
Detailed Description
The present application is described in further detail below with reference to examples.
The starting materials used in the preparation examples and examples of the present application are all commercially available;
the following are part of the raw material specifications of the present application:
1. star SEBS: the molecular weight is 25-35 ten thousand, and the styrene content is 20-35%;
2. isotactic polypropylene resin: commercial injection molding grade, standard;
3. syndiotactic polypropylene resin: commercially available, with a syndiotacticity of greater than 80% and a density of 0.88g/cm 3 ；
4. Carbon black: reinforcing carbon black for rubber and DBP absorption value of 100-120cm 3 100g, particle size 10-40nm;
si-69 type silane coupling agent: bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, content 99%;
6. glycidyl methacrylate, technical grade, 99.6% content, density 1.074g/cm 3 ；
7. Commercial modified star-shaped SEBS: maleic anhydride grafted star SEBS with maleic anhydride grafting rate of 0.5-2%.
8. Commercially available modified carbon black: the grain diameter is 10-40nm.
Preparation example of modified Star-shaped SEBS
Preparation example 1
The modified star-shaped SEBS is prepared by the following steps:
a1, adding 4.5kg of star-shaped SEBS and 0.6kg of turpentine into reaction equipment, and stirring at the temperature of 100 ℃ for 3 hours to prepare a mixture I;
a2, adding 1kg of calcium carbonate, 0.3kg of triisostearyl isopropyl titanate and 0.1kg of maleic anhydride into the mixture I prepared in the step A1, heating to 155 ℃ for reaction, and performing extrusion granulation after reacting for 1h to prepare the modified star SEBS.
PREPARATION EXAMPLES 2-3
Preparation examples 2 to 3 differ from preparation example 1 in the amounts of the raw materials and the preparation conditions, see in particular Table 1 below.
TABLE 1 raw materials amounts and preparation conditions of preparation examples 1 to 3
Figure BDA0004087097310000061
Preparation example of soaking agent
Preparation example 4
The soaking agent is prepared by the following steps:
adding 4kg of water into a stirring tank, adding 0.3kg of sodium hexametaphosphate into the stirring tank, stirring and dissolving, continuously adding 1.5kg of polyethylene glycol 400, 0.5kg of fatty alcohol polyoxyethylene ether and 0.08kg of citrate buffer solution with pH of 4 into the stirring tank, and stirring uniformly to obtain the soaking agent.
Preparation examples 5 to 6
Preparation examples 5 to 6 differ from preparation example 4 in the amounts of the raw materials and the preparation conditions, see in particular Table 2 below.
TABLE 2 raw material amounts and preparation conditions of preparation examples 4 to 6
Figure BDA0004087097310000071
Preparation example of modified carbon black
Preparation example 7
The modified carbon black is prepared by the following steps:
b1, soaking 6kg of carbon black in 10kg of the soaking agent prepared in preparation example 4, stirring and soaking for 4 hours, and drying at 60 ℃ after soaking to prepare pretreated carbon black;
and B2, adding 1kg of silane coupling agent KH-560 and 3kg of 60% ethanol aqueous solution into the pretreated carbon black prepared in the step B1, stirring at 40 ℃ for 2 hours, filtering and drying to obtain the modified carbon black.
Preparation examples 8 to 9
Preparation examples 8 to 9 differ from preparation example 7 in the amounts of the raw materials and the preparation conditions, see in particular Table 3 below.
TABLE 3 raw materials consumption and preparation conditions Table for preparation examples 7 to 9
Figure BDA0004087097310000072
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Figure BDA0004087097310000081
Preparation of comparative example 1
The difference between the preparation of comparative example 1 and the preparation of example 7 is that the modified carbon black in the preparation of comparative example 1 is not pretreated by a soaking agent, specifically, the preparation steps are that 1kg of silane coupling agent KH-560 and 3kg of ethanol aqueous solution with mass fraction of 60% are added into the carbon black, stirring reaction is carried out at 40 ℃ for 2 hours, and then filtration and drying are carried out, thus obtaining the modified carbon black.
Examples
Example 1
The wear-resistant high-elasticity wheel skin of the luggage is prepared by the following steps:
s1, adding 3.5kg of commercial modified star-shaped SEBS, 1.07kg of isotactic polypropylene resin, 0.43kg of syndiotactic polypropylene resin, 1.6kg of 10# paraffin oil and 0.4kg of KN4006 naphthenic oil into a reaction device, heating to 70 ℃, and stirring for 1h under the conditions that the pressure is 2KPa and the stirring rate is 700r/min to obtain a mixture I;
s2, adding 1.8kg of commercially available modified carbon black, 0.071kg of Si-69 type silane coupling agent, 0.029kg of glycidyl methacrylate, 0.017kg of 1010 antioxidant and 0.003kg of 618 antioxidant into the mixture I, mixing and stirring for 1.5-2.5 hours, and uniformly stirring to obtain a mixture II;
s3, melting and mixing the mixture II in an injection molding machine, wherein the mixing temperature is 210-230 ℃, the mixing time is 2-3h, and then extrusion molding is carried out under the condition that the extrusion pressure is 0.3-0.8MPa, so that the case wear-resistant high-elasticity wheel cover is obtained.
Example 2
Example 2 differs from example 1 in that the modified star-shaped SEBS in example 2 was derived from preparation example 1, and otherwise was the same as example 1.
Example 3
Example 3 differs from example 1 in that the modified carbon black in example 3 was derived from preparation example 7, and otherwise was the same as in example 1.
Example 4
Example 4 differs from example 1 in that the modified star-shaped SEBS in example 4 was derived from preparation example 1, the modified carbon black was derived from preparation example 7, and the other steps were the same as in example 1.
Examples 5 to 6
Examples 5-6 differ from example 4 in that examples 5-6 differ in the source of the modified star SEBS and the source of the modified carbon black, and in the amounts of raw materials and the preparation conditions in the formulation, see in particular Table 4 below.
TABLE 4 raw materials amounts and preparation conditions Table for examples 4-6
Figure BDA0004087097310000091
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Figure BDA0004087097310000101
Example 7
Example 7 differs from example 4 in that in example 7, the modified carbon black was derived from the production of comparative example 1, and otherwise was the same as in example 7.
Example 8
Example 8 differs from example 4 in that the amount of isotactic polypropylene resin used in example 8 is 1kg, and the amount of syndiotactic polypropylene resin used is 1kg, the other points being the same as in example 4.
Example 9
Example 9 was different from example 4 in the proportion of the amount of the abrasion-resistant auxiliary agent used in example 9, the amount of the Si-69 type silane coupling agent used was 0.1kg, and the amount of glycidyl methacrylate used was 0.1kg, except that the proportion was the same as in example 4.
Example 10
Example 10 differs from example 4 in that the same amount of glycidyl methacrylate was replaced with a Si-69 type silane coupling agent in example 10, and the other is the same as example 4.
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that the commercial modified star SEBS was replaced with the commercial ordinary star SEBS in the equivalent amount, the commercial modified carbon black was replaced with the commercial ordinary carbon black in the equivalent amount, and the other steps were the same as in example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that the commercially available modified high molecular weight linear SEBS was replaced with the commercially available ordinary high molecular weight linear SEBS in the same amount in comparative example 2, except that the same procedure as in example 1 was adopted.
Comparative example 3
Comparative example 3 differs from example 1 in that the commercially available modified carbon black was replaced with the commercially available ordinary carbon black in the same amount in comparative example 3, and the other is the same as in example 1.
Comparative example 4
Comparative example 4 differs from example 1 in that no abrasion resistance aid was added in comparative example 4, and the other is the same as in example 1.
Performance test
The abrasion-resistant and high-elasticity luggage wheel covers prepared in examples 1 to 10 and comparative examples 1 to 4 of the present application were subjected to the following performance tests: wherein, the thickness of the wear-resistant high-elasticity wheel skin of the prepared case is 0.5cm;
hardness test (one)
According to the test method in ASTM D2240, a Shore A hardness is tested by using a Shore hardness tester, and the test result is recorded;
(II) abrasion resistance test
According to the test method in GB/T9867-2008 "determination of abrasion resistance of vulcanized rubber or thermoplastic rubber (Rotary roller abrasion machine method"), the DIN abrasion tester is adopted to test and record the abrasion amount;
(III) rebound resilience test
The rebound resilience test was performed and the test result was recorded according to the test method in ASTM D1054-1991, test method for measuring rubber elasticity by rebound pendulum method;
the following are the performance test data for the case wear-resistant highly elastic skins prepared in examples 1-10 and comparative examples 1-4, see in particular Table 5 below.
TABLE 5 Performance test data sheets for examples 1-10 and comparative examples 1-4
Figure BDA0004087097310000111
As can be seen by combining examples 1-7 and comparative examples 1-3 and combining Table 5, the abrasion loss of the wear-resistant high-elasticity wheel skin of the luggage manufactured by the invention is lower and can reach 89.2mm 3 The anti-wear elastic luggage case has good wear resistance, rebound resilience of 81.5%, good rebound resilience and good shock absorption and protection effects on the luggage case.
It can be seen from the combination of examples 4 to 6, examples 8 to 10 and comparative example 4 and the combination of table 5 that the wear resistance of the prepared luggage wheel skin can be improved by adopting the polypropylene resin with a better proportion and the wear resistance auxiliary agent with a better proportion, and other properties can be also improved.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (9)

1. The wear-resistant high-elasticity wheel cover for the luggage is characterized by being prepared from the following raw materials in parts by weight:
35-55 parts of modified star-shaped SEBS
15-25 parts of polypropylene resin
20-40 parts of mineral oil
18-28 parts of modified carbon black
1-3 parts of wear-resistant auxiliary agent
0.2-1 part of antioxidant.
2. The wear-resistant and high-elasticity luggage wheel skin according to claim 1, wherein the modified star-shaped SEBS is prepared by the following steps:
a1, adding 45-65 parts of star-shaped SEBS and 6-12 parts of turpentine into reaction equipment according to parts by weight, stirring at 100-120 ℃ for 3-4 hours to prepare a mixture I;
a2, adding 10-15 parts of calcium carbonate, 3-6 parts of triisostearyl isopropyl titanate and 1-3 parts of maleic anhydride into the mixture I prepared in the step A1, heating to 155-175 ℃ for reaction, extruding and granulating after reacting for 1-2 hours, and thus obtaining the modified star SEBS.
3. The wear-resistant and high-elasticity luggage leather according to claim 1, wherein the polypropylene resin is composed of isotactic polypropylene resin and syndiotactic polypropylene resin with the dosage ratio of 1 (0.3-0.5).
4. The wear-resistant and high-elasticity luggage cover according to claim 1, wherein the modified carbon black is prepared by the following steps:
b1, soaking 6-8 parts of carbon black in 10-12 parts of a soaking agent in parts by weight, stirring and soaking for 4-5 hours, and drying after soaking to obtain pretreated carbon black;
b2, adding 1-2 parts of silane coupling agent KH-560 and 3-5 parts of ethanol aqueous solution with mass fraction of 60-80% into the pretreated carbon black prepared in the step B1, stirring and reacting at 40-50 ℃ for 2-3 hours, filtering and drying to prepare modified carbon black;
the soaking agent consists of the following raw materials in parts by weight: 15-25 parts of polyethylene glycol 400, 5-10 parts of fatty alcohol polyoxyethylene ether, 3-5 parts of sodium hexametaphosphate, 0.8-1.5 parts of citrate buffer solution with pH value of 4-5 and 40-50 parts of water.
5. The case wear-resistant high-elasticity wheel cover according to claim 1, wherein the mineral oil consists of paraffinic oil and naphthenic oil with a dosage ratio of 1 (0.25-0.4), the paraffinic oil is any one of 10# paraffinic oil, 15# paraffinic oil and 26# paraffinic oil, and the naphthenic oil is any one of KN4006 naphthenic oil and KN4010 naphthenic oil.
6. The wear-resistant and high-elasticity luggage leather according to claim 1, wherein the wear-resistant auxiliary agent consists of a Si-69 type silane coupling agent and glycidyl methacrylate with the dosage ratio of 1 (0.4-0.6).
7. A luggage wear-resistant and high-elasticity wheel cover according to claim 1, wherein the antioxidant comprises a hindered phenol antioxidant and a phosphite antioxidant in an amount ratio of 1 (0.2-0.4), the hindered phenol antioxidant is any one of 1010 and 1076, and the phosphite antioxidant is any one of 618 and 626.
8. A method for producing a wear-resistant and highly elastic luggage wheel skin according to any one of claims 1 to 7, comprising the steps of:
s1, adding modified star-shaped SEBS, polypropylene resin and mineral oil into reaction equipment, heating to 70-80 ℃, and stirring for 1-2 hours to obtain a mixture I;
s2, adding the modified carbon black, the wear-resistant auxiliary agent and the antioxidant into the mixture I, mixing and stirring for 1.5-2.5 hours, and uniformly stirring to obtain a mixture II;
and S3, melting and mixing the mixture II in an injection molding machine, and then extruding and molding to obtain the wear-resistant high-elasticity luggage wheel cover.
9. The method for preparing the wear-resistant and high-elasticity luggage wheel skin according to claim 8, wherein the pressure in the step S1 is 2-6KPa, and the stirring speed is 700-1200r/min; the mixing temperature in the step S3 is 210-230 ℃, the mixing time is 2-3h, and the extrusion pressure is 0.3-0.8MPa.
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Citations (5)

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US20050008669A1 (en) * 1994-04-19 2005-01-13 Chen John Y. Tear resistant gels and articles for every uses
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CN102555677A (en) * 2010-11-15 2012-07-11 固特异轮胎和橡胶公司 Pneumatic tire with an innerliner and method of making the same
CN105566924A (en) * 2015-12-24 2016-05-11 广州合成材料研究院有限公司 Wear-resistant SEBS thermoplastic elastomer material and preparation method thereof
CN108997701A (en) * 2017-06-07 2018-12-14 中国石油化工股份有限公司 A kind of solid tread mix, preparation and its application

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050008669A1 (en) * 1994-04-19 2005-01-13 Chen John Y. Tear resistant gels and articles for every uses
CN102555677A (en) * 2010-11-15 2012-07-11 固特异轮胎和橡胶公司 Pneumatic tire with an innerliner and method of making the same
CN102093661A (en) * 2011-01-13 2011-06-15 岳阳雅达塑胶有限公司 Low-hardness, halogen-free and flame-retarding elastomer material and preparation method thereof
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CN108997701A (en) * 2017-06-07 2018-12-14 中国石油化工股份有限公司 A kind of solid tread mix, preparation and its application

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