CN111087662B - Ball-in-ball surface skin material and preparation method of ball-in-ball surface skin - Google Patents

Ball-in-ball surface skin material and preparation method of ball-in-ball surface skin Download PDF

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CN111087662B
CN111087662B CN201911383638.7A CN201911383638A CN111087662B CN 111087662 B CN111087662 B CN 111087662B CN 201911383638 A CN201911383638 A CN 201911383638A CN 111087662 B CN111087662 B CN 111087662B
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accelerator
sbr
tire
basketball
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CN111087662A (en
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林俊男
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Yuan Chi Sports Enterprise Co Ltd
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Yuan Chi Sports Enterprise Co Ltd
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Abstract

The invention relates to a ball-in-ball surface skin material and a preparation method thereof, wherein the ball-in-ball surface skin material comprises the following components in parts by weight: 30-50 parts of SBR/EVA blend, 30-60 parts of reinforcing filler, 0.5-1.0 part of vulcanizing agent, 0.8-1.2 parts of accelerator and 1-3 parts of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1: 0.1-0.3, the ball-in-ball tire skin prepared from the ball-in-tire skin material has excellent weather resistance and wear resistance, even along with the change of climate and time, the property of the ball-in-tire skin still has little change, and in addition, the ball-in-tire skin is soft in texture and has good flexibility and impact resistance.

Description

Ball-in-ball surface skin material and preparation method of ball-in-ball surface skin
Technical Field
The invention relates to a ball-in-ball surface skin material and a preparation method of a ball-in-ball surface skin.
Background
As one of the sports, ball games are increasingly popular with people, including basketball, football, volleyball, rugby and the like, and especially basketball and football are increasingly popular in students' sports in schools, and corresponding teaching courses are set.
Taking a basketball as an example, most of basketballs mainly comprise, from inside to outside, an inner bladder, a yarn winding layer, a middle carcass layer (it should be noted that, in general, the middle carcass in the prior art is composed of the inner bladder, the yarn winding layer and a middle carcass cover, and the middle carcass layer in the prior art is essentially referred to as the middle carcass cover), and a basketball cover covering the periphery of the middle carcass layer, and of course, a ball mouth and the like are further provided on the ball. Wherein, well child layer is inner bag and basketball epidermis bearing structure within a definite time, and well child layer plays the protection and twines yarn layer and inner bag, links up the basketball epidermis and guarantees the effect of ball circularity, and well child layer has direct relation with the wholeness ability of basketball, and the quality of well child layer can directly influence the bounciness degree, pliability, the feeling and the life of basketball. The traditional basketball has the defects of hard middle tyre, poor gripping feeling and poor bounce degree, and in addition, the traditional basketball has poor weather resistance, the surface of the middle tyre is easy to embrittle along with the change of climate and time, and the whole basketball is easy to deform.
Disclosure of Invention
An object of the present invention is to provide a ball-in-ball cover material having good weather resistance and soft texture. In addition, the invention also provides a ball-in-tire skin made of the ball-in-tire skin material and a preparation method of the ball-in-tire skin.
The purpose of the invention is realized by the following technical scheme: the surface material of the middle ball comprises the following components in parts by weight: 30-50 parts of SBR/EVA blend, 30-60 parts of reinforcing filler, 0.5-1.0 part of vulcanizing agent, 0.8-1.2 parts of accelerator and 1-3 parts of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, and the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1: 0.1-0.3.
The ball-in-ball surface skin material includes but is not limited to basketball surface skin material, volleyball surface skin material, football surface skin material and the like.
A ball-in-tire skin made of the ball-in-tire skin material.
The ball center tire epidermis includes but is not limited to basketball center tire epidermis, volleyball center tire epidermis, football center tire epidermis, and the like.
The preparation method of the ball-in-ball tire skin comprises the following process steps:
(1) preparation of SBR/EVA blends: melting and mixing the weighed styrene butadiene rubber and the ethylene-vinyl acetate copolymer to obtain an SBR/EVA blend;
(2) preparing a main rubber: adding the SBR/EVA blend obtained in the step (1), a reinforcing filler and an accelerator into an internal mixer for mixing to obtain a main rubber;
(3) preparing a ball-in-ball surface skin material: adding the main rubber obtained in the step (2), a foaming agent and a vulcanizing agent into an open mill for mixing to obtain a ball-in-ball tire skin material;
(4) and (4) extruding, rolling and cutting the ball middle tire surface skin material obtained in the step (3) to obtain the ball middle tire surface skin.
A ball-in-ball tyre made of the ball-in-ball tyre skin.
The ball center casing includes but is not limited to basketball center casing, volleyball center casing, football center casing, etc.
Balls made from the ball-in-ball casing.
Including but not limited to basketball, volleyball, soccer, and football, among others.
Compared with the prior art, the invention has the advantages that:
1. the surface skin material of the ball-in-ball tire is prepared by blending and foaming an SBR/EVA blend and other materials, wherein the weight ratio of styrene-butadiene rubber to ethylene-vinyl acetate copolymer in the SBR/EVA blend is 1: 0.1-0.3, the ball-in-ball tire surface skin prepared from the surface skin material has excellent weather resistance and wear resistance, and even along with the change of climate and time, the property of the ball-in-ball tire surface skin still has great change, so that the ball-in-ball tire prepared from the ball-in-tire surface skin is not easy to deform, and the surface skin is not easy to crack, embrittle and crack.
2. Balls made from the inventive carcass cover material have the same bounce and grip as traditional balls, but the ball feels softer.
3. The ball-in-tire skin material prepared from the ball-in-tire skin material has soft texture and good flexibility and impact resistance.
Detailed Description
The present invention will be described in detail with reference to the following examples:
the surface material of the middle ball comprises the following components in parts by weight: 30-50 parts of SBR/EVA blend, 30-60 parts of reinforcing filler, 0.5-1.0 part of vulcanizing agent, 0.8-1.2 parts of accelerator and 1-3 parts of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, and the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1: 0.1-0.3.
The ball-in-ball surface skin material includes but is not limited to basketball surface skin material, volleyball surface skin material, football surface skin material and the like.
The reinforcing filler is one or a mixture of more of carbon black, kaolin, calcium carbonate and zinc oxide.
The vulcanizing agent is sulfur.
The promoter is one or a mixture of more of a promoter M, a promoter DM, a promoter CZ and a promoter D.
The foaming agent is one or a mixture of several of azodicarbonamide, 4' -oxo-bis-benzenesulfonyl hydrazide and p-toluene sulfonyl hydrazide.
A ball-in-tire skin made of the ball-in-tire skin material. Compared with the traditional ball middle tire skin, the ball middle tire skin has better weather resistance.
The ball center tire epidermis includes but is not limited to basketball center tire epidermis, volleyball center tire epidermis, football center tire epidermis, and the like.
The preparation method of the ball-in-ball tire skin comprises the following process steps:
(1) preparation of SBR/EVA blends: melting and mixing the weighed styrene butadiene rubber and the ethylene-vinyl acetate copolymer to obtain an SBR/EVA blend;
(2) preparing a main rubber: adding the SBR/EVA blend obtained in the step (1), a reinforcing filler and an accelerator into an internal mixer for mixing to obtain a main rubber;
(3) preparing a ball-in-ball surface skin material: adding the main rubber obtained in the step (2), a foaming agent and a vulcanizing agent into an open mill for mixing to obtain a ball-in-ball tire skin material;
(4) and (4) extruding, rolling and cutting the ball middle tire surface skin material obtained in the step (3) to obtain the ball middle tire surface skin.
The specific operation method of the step (1) comprises the following steps: setting the surface temperature of the double rollers of the open plasticator to be 50-70 ℃, then adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 10-15min to obtain the SBR/EVA blend.
The specific operation method of the step (2) is as follows: and (2) adding the SBR/EVA blend obtained in the step (1), a reinforcing filler and an accelerator into an internal mixer, and mixing for 8-10min at the temperature of 60-80 ℃ to obtain the main rubber.
The specific operation method of the step (3) is as follows: and (3) adding the main rubber obtained in the step (2), a foaming agent and a vulcanizing agent into an open mill, and mixing for 10-20min at 50-70 ℃ to obtain the surface material of the tire in the ball.
The invention is explained in more detail below with reference to specific examples:
the first embodiment is as follows:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 1kg of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, wherein the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.1, namely 27.27kg of the styrene butadiene rubber and 2.73kg of the ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator M.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate and an accelerator M into an internal mixer, and mixing for 9min at 70 ℃ to obtain the master batch.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example two:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.2, namely 25kg of styrene-butadiene rubber and 5kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator M.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate and an accelerator M into an internal mixer, and mixing for 9min at 70 ℃ to obtain the master batch.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example three:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.25, namely 24kg of styrene-butadiene rubber and 6kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator M.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate and an accelerator M into an internal mixer, and mixing for 9min at 70 ℃ to obtain the master batch.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example four:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.25, namely 24kg of styrene-butadiene rubber and 6kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The promoter is a promoter mixture formed by mixing a promoter M, a promoter DM and a promoter CZ, and the weight ratio of the promoter M to the promoter DM to the promoter CZ in the promoter mixture is 6: 4: 5, i.e. 0.48kg, 0.32kg and 0.4kg of accelerator M, accelerator DM and accelerator CZ, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator CZ into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example five:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.25, namely 24kg of styrene-butadiene rubber and 6kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator mixture formed by mixing an accelerator M, an accelerator DM and an accelerator D, and the weight ratio of the accelerator M to the accelerator DM to the accelerator D in the accelerator mixture is 6: 4: 5, namely, 0.48kg, 0.32kg and 0.4kg of accelerator M, accelerator DM and accelerator D, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator D into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example six:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 0.9kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.25, namely 24kg of styrene-butadiene rubber and 6kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator mixture formed by mixing an accelerator M, an accelerator DM and an accelerator D, and the weight ratio of the accelerator M to the accelerator DM to the accelerator D in the accelerator mixture is 6: 4: 5, namely, 0.36kg, 0.24kg and 0.3kg of accelerator M, accelerator DM and accelerator D, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator D into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example seven:
the basketball middle tire surface skin material comprises the following components:
30kg of SBR/EVA blend, 60kg of reinforcing filler, 0.5kg of vulcanizing agent, 1.2kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.3, namely 23.08kg of styrene-butadiene rubber and 6.92kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator mixture formed by mixing an accelerator M, an accelerator DM and an accelerator D, and the weight ratio of the accelerator M to the accelerator DM to the accelerator D in the accelerator mixture is 6: 4: 5, namely, 0.48kg, 0.32kg and 0.4kg of accelerator M, accelerator DM and accelerator D, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator D into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example eight:
the basketball middle tire surface skin material comprises the following components:
40kg of SBR/EVA blend, 50kg of reinforcing filler, 0.8kg of vulcanizing agent, 0.8kg of accelerator and 3kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.1, namely 36.36kg of styrene-butadiene rubber and 3.64kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is carbon black;
the vulcanizing agent is sulfur.
The accelerator is an accelerator M.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 50 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 15min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black and an accelerator M into an internal mixer, and mixing for 8min at 80 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 10min at 70 ℃ to obtain the surface material of the basketball midtire.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
Example nine:
the basketball middle tire surface skin material comprises the following components:
40kg of SBR/EVA blend, 50kg of reinforcing filler, 0.8kg of vulcanizing agent, 0.8kg of accelerator and 3kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.1, namely 36.36kg of styrene-butadiene rubber and 3.64kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black, calcium carbonate and zinc oxide; wherein the mass ratio of the carbon black, the calcium carbonate and the zinc oxide is 2:3:1, namely 16.67kg of the carbon black, 25kg of the calcium carbonate and 8.33kg of the zinc oxide;
the vulcanizing agent is sulfur.
The accelerator is an accelerator M.
The foaming agent is azodicarbonamide.
A basketball middle tyre surface skin made of the basketball middle tyre surface skin material. The preparation method of the basketball midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: setting the surface temperature of the double rollers of the open plasticator to 70 ℃, then adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 10min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, zinc oxide and an accelerator M into an internal mixer, and mixing for 10min at 60 ℃ to obtain the main rubber.
(3) Preparing a basketball middle tyre skin material: and (3) adding the main rubber obtained in the step (2), azodicarbonamide and sulfur into an open mill, and mixing for 20min at 50 ℃ to obtain the surface material of the basketball midtyre.
(4) And (4) extruding, rolling and cutting the basketball middle tire surface skin material obtained in the step (3) to obtain the basketball middle tire surface skin.
The basketball middle tire skins prepared in the above examples I to ninth all have good physical properties. Examples one to nine, the aged physical property test data of the basketball center tire skins prepared in the above examples and the conventional basketball center tire skins under the aging condition of 105 ℃ and 24 hours are shown in table 1:
TABLE 1 measurement data of aged physical Properties
Figure BDA0002342923570000111
As can be seen from the data in Table 1, the values of elongation at break, tensile strength and 300% stress at break before aging of the carcass skin in the conventional basketball are greatly changed from the corresponding values after aging (e.g., the elongation at break before aging is 500.82%, the elongation at break after aging is 520.25%, and the tensile strength before aging is 54.56 kg/cm)2While the aged tensile strength was reduced to 30.65kg/cm2) The weather resistance of the tire skin in the traditional basketball is not good; from the 300% stress at definite elongation of the tire skin in a traditional basketball, it can be known that: the 300% stress at definite elongation before aging was 36.3kg/cm2After aging, the temperature was lowered to a lower level, only 12.5kg/cm2This indicates that the wear resistance of the surface of the conventional basketball is also poor.
The basketball middle tire skins obtained in the first to ninth embodiments of the invention have small changes in the values before and after aging, and the elongation at break before aging is 500.25% and the elongation at break after aging is 510.13% of the basketball middle tire skins obtained in the fifth embodiment; the tensile strength before aging was 55.68kg/cm2Tensile strength after aging of 56.42kg/cm2And the numerical value change before and after aging is not large, which shows that the basketball middle tire skin prepared by the invention has more excellent weather resistance compared with the traditional basketball middle tire skin. In addition, fromThe 300% stress at definite elongation before and after aging of the basketball middle tire skins prepared in the embodiments shows that the basketball middle tire skin prepared in the invention has better wear resistance than the traditional basketball middle tire skin. By comprehensively considering the data in the table 1, the skin of the basketball middle tire obtained in the fifth embodiment of the invention has the most excellent performance, and the skin of the basketball middle tire obtained in the fifth embodiment of the invention has stable performance, good weather resistance and excellent wear resistance, is moderate in hardness and elasticity before and after aging, and is the best choice for the skin of the basketball middle tire.
Example ten:
the surface material of volleyball middle tire comprises the following components:
50kg of SBR/EVA blend, 30kg of reinforcing filler, 1.0kg of vulcanizing agent, 1.2kg of accelerator and 3kg of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, wherein the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.2, namely 41.67kg of the styrene butadiene rubber and 8.33kg of the ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 10kg, and the weight of the calcium carbonate is 20 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator mixture formed by mixing an accelerator M, an accelerator DM and an accelerator D, and the weight ratio of the accelerator M to the accelerator DM to the accelerator D in the accelerator mixture is 6: 4: 5, namely, 0.48kg, 0.32kg and 0.4kg of accelerator M, accelerator DM and accelerator D, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A volleyball midget carcass skin made of the volleyball midget carcass skin material. The preparation method of the volleyball midget carcass skin comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator D into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a volleyball middle tire skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the tire skin material in the volleyball.
(4) And (4) extruding, rolling and cutting the skin material of the volleyball midget body obtained in the step (3) to obtain the skin of the volleyball midget body.
Example eleven:
a football middle tyre surface material comprises the following components:
40kg of SBR/EVA blend, 60kg of reinforcing filler, 1.0kg of vulcanizing agent, 0.9kg of accelerator and 2kg of foaming agent; wherein, the SBR/EVA blend comprises styrene-butadiene rubber and ethylene-vinyl acetate copolymer, and the weight ratio of the styrene-butadiene rubber to the ethylene-vinyl acetate copolymer is 1:0.25, namely 32kg of styrene-butadiene rubber and 8kg of ethylene-vinyl acetate copolymer.
The reinforcing filler is a mixture of carbon black and calcium carbonate; the weight ratio of the carbon black to the calcium carbonate is 0.5:1, namely the weight of the carbon black is 20kg, and the weight of the calcium carbonate is 40 kg;
the vulcanizing agent is sulfur.
The accelerator is an accelerator mixture formed by mixing an accelerator M, an accelerator DM and an accelerator D, and the weight ratio of the accelerator M to the accelerator DM to the accelerator D in the accelerator mixture is 6: 4: 5, namely, 0.36kg, 0.24kg and 0.3kg of accelerator M, accelerator DM and accelerator D, respectively.
The foaming agent is 4, 4' -oxo-bis-benzenesulfonyl hydrazide.
A football middle tyre surface skin made of the football middle tyre surface skin material. The preparation method of the football midtyre epidermis comprises the following process steps:
(1) preparation of SBR/EVA blends: and setting the surface temperature of the double rollers of the open plasticator to 65 ℃, adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 12min to obtain the SBR/EVA blend.
(2) Preparing a main rubber: and (2) adding the SBR/EVA blend obtained in the step (1), carbon black, calcium carbonate, an accelerator M, an accelerator DM and an accelerator D into an internal mixer, and mixing for 9min at 70 ℃ to obtain the main rubber.
(3) Preparing a football middle-fetal skin material: and (3) adding the main rubber obtained in the step (2), 4' -oxybis-benzenesulfonyl hydrazide and sulfur into an open mill, and mixing for 15min at 65 ℃ to obtain the olive ball midtire skin material.
(4) And (4) extruding, rolling and cutting the football middle tire surface skin material obtained in the step (3) to obtain the football middle tire surface skin.
It should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and that those skilled in the art may make various changes, improvements and modifications without departing from the spirit of the present invention, and these changes, improvements and modifications should be construed as the protection scope of the present invention.

Claims (9)

1. The utility model provides a child epidermis in ball which characterized in that: the paint comprises the following components in parts by weight: 30-50 parts of SBR/EVA blend, 30-60 parts of reinforcing filler, 0.5-1.0 part of vulcanizing agent, 0.8-1.2 parts of accelerator and 1-3 parts of foaming agent; the SBR/EVA blend comprises styrene butadiene rubber and an ethylene-vinyl acetate copolymer, and the weight ratio of the styrene butadiene rubber to the ethylene-vinyl acetate copolymer is 1: 0.1-0.3.
2. The ball-in-tire cover according to claim 1, wherein: the reinforcing filler is one or a mixture of more of carbon black, kaolin, calcium carbonate and zinc oxide.
3. The ball-in-tire cover according to claim 1, wherein: the vulcanizing agent is sulfur.
4. The ball-in-tire cover according to claim 1, wherein: the promoter is one or a mixture of more of a promoter M, a promoter DM, a promoter CZ and a promoter D.
5. The ball-in-tire cover according to claim 1, wherein: the foaming agent is one or a mixture of several of azodicarbonamide, 4' -oxo-bis-benzenesulfonyl hydrazide and p-toluene sulfonyl hydrazide.
6. A method of preparing a carcass skin in a ball according to any one of claims 1 to 5, characterized in that: the method comprises the following process steps:
(1) preparation of SBR/EVA blends: melting and mixing the weighed styrene butadiene rubber and the ethylene-vinyl acetate copolymer to obtain an SBR/EVA blend;
(2) preparing a main rubber: adding the SBR/EVA blend obtained in the step (1), a reinforcing filler and an accelerator into an internal mixer for mixing to obtain a main rubber;
(3) preparing a ball-in-ball surface skin material: adding the main rubber obtained in the step (2), a foaming agent and a vulcanizing agent into an open mill for mixing to obtain a ball-in-ball tire skin material;
(4) and (4) extruding, rolling and cutting the ball middle tire surface skin material obtained in the step (3) to obtain the ball middle tire surface skin.
7. The method for producing a carcass skin in a ball according to claim 6, characterized in that: the specific operation method of the step (1) comprises the following steps: setting the surface temperature of the double rollers of the open plasticator to be 50-70 ℃, then adding the weighed styrene-butadiene rubber and ethylene-vinyl acetate copolymer into the open plasticator, and mixing for 10-15min to obtain the SBR/EVA blend.
8. The method for producing a carcass skin in a ball according to claim 6, characterized in that: the specific operation method of the step (2) is as follows: and (2) adding the SBR/EVA blend obtained in the step (1), a reinforcing filler and an accelerator into an internal mixer, and mixing for 8-10min at the temperature of 60-80 ℃ to obtain the main rubber.
9. The method for producing a carcass skin in a ball according to claim 6, characterized in that: the specific operation method of the step (3) is as follows: and (3) adding the main rubber obtained in the step (2), a foaming agent and a vulcanizing agent into an open mill, and mixing for 10-20min at 50-70 ℃ to obtain the surface material of the tire in the ball.
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