CN109400973A - A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and preparation process - Google Patents
A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and preparation process Download PDFInfo
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- CN109400973A CN109400973A CN201811246665.5A CN201811246665A CN109400973A CN 109400973 A CN109400973 A CN 109400973A CN 201811246665 A CN201811246665 A CN 201811246665A CN 109400973 A CN109400973 A CN 109400973A
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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
- C08L7/00—Compositions of natural rubber
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- 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
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The present invention relates to field of rubber technology, more particularly to a kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and its manufacture craft, it comprises the following components in parts by weight: 100 parts of natural rubber, 18-21 parts of white carbon black, 55-57 parts of talcum powder, 14-17 parts of paraffin oil, 4-6 parts of zinc oxide, 0.8-1.2 parts of stearic acid, 1.8-2.2 parts of activating agent, 0.8-1.2 parts of anti-aging agent, 0.8-1.2 parts of yellow color masterbatch, 0.4-0.6 parts of eliminating smell agent, 1-1.5 parts of sulphur, 1.7-2 parts of promotor, its manufacture craft includes that kneading machine is added in raw rubber and various additives in certain sequence, it is allowed to after being sufficiently mixed uniformly, the dumping tabletting in open mill, the superior promotor of performance under vulcanizing agent and low temperature is added after cooling, it is kneaded again, it obtains anti- Answer sufficient rubber compound.The present invention obtains caoutchouc elasticity height, and odorlessness, torn edges is good, meets the requirement of food-grade rubber.
Description
Technical field
The present invention relates to field of rubber technology more particularly to a kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and its
Preparation process.
Background technique
Although natural rubber raw rubber elasticity is preferably, the torn edges effect of product is poor, currently, example is added in natural rubber
Such as calcium carbonate, talcum powder, carbon black filler, a kind of rubber composition as disclosed in Patent No. CN1407007, although torn edges is imitated
Fruit is improved to a certain extent, but therewith caoutchouc elasticity reduce become apparent from, and hand scrape product surface have it is permanent white
Point and trace, the stability of product size are also affected.Application No. is the patent of CN201611266285 disclose it is a kind of high
Elastic rubber composition both had one to the elasticity of natural rubber using natural rubber and the cooperating therewith compound rubber used
Fixed facilitation, and the addition of filler can be overcome to reduce the defect of torn edges effect, integral, flexible is improved, is substantially improved natural
The performance of rubber, while compound rubber uses the mixture of butadiene-styrene rubber and butadiene rubber, not only has said effect, moreover it is possible to keep away
Exempt from hand and scrape the defect that rubber surface generates permanent white point and trace, but the rubber smell is heavier, is not suitable for food neck
Domain.
Summary of the invention
In view of the above problems, the present invention proposes a kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and its preparation work
Skill, obtained product glue elasticity is high, and odorlessness, torn edges is good, meets the requirement of food-grade rubber.
In order to achieve the above object, the present invention is achieved through the following technical solutions: a kind of food-grade odorlessness high resiliency is excellent
Torn edges natural gum, comprises the following components in parts by weight: 100 parts of natural rubber, 18-21 parts of white carbon black, and 55-57 parts of talcum powder, stone
14-17 parts of wax oil, 4-6 parts of zinc oxide, 0.8-1.2 parts of stearic acid, 1.8-2.2 parts of activating agent, 0.8-1.2 parts of anti-aging agent, yellow
0.8-1.2 parts of color masterbatch, 0.4-0.6 parts of eliminating smell agent, 1-1.5 parts of sulphur, 1.7-2 parts of promotor.
The present invention is the theme with natural rubber, and white carbon black and talcum powder are filler, white carbon black to natural rubber into
Row reinforcement and filling improve the elasticity and intensity of natural rubber, and talcum powder acts not only as the filler of rubber, to reduce
Production cost can effectively prevent the shape of stabilising rubber, delay the old of rubber because there is preferable dispersibility in sizing material
Change；A small amount of paraffin oil is added, on the one hand, paraffin oil can effectively promote the ageing-resistant of rubber, resistance to thermal energy as rubber filling oil
Can, on the other hand, the product that the present invention obtains is food-grade natural gum, and paraffin oil is small as smell, and volatile matter is few, priming color
It is good, it is relatively friendly to environment, it is suitble to the requirement of food-grade rubber；Zinc oxide and stearic acid form newly in Vulcanization Process of Rubber
Activation system, in use, polysulfide bond can be broken vulcanizate, and the hydrogen sulfide of generation can accelerate the aging of rubber, still
Zinc oxide and stearic presence can consume hydrogen sulfide, to slow down the aging of rubber；Yellow color masterbatch is to carry out rubber
Color is looked for, the color of the rubber for the holding that outstanding Masterbatch can be steady in a long-term promotes the ageing-resistant performance of rubber.
Preferably, the promotor includes thiurams and thiazoles, and the weight ratio of the thiurams and thiazoles is
1:2-3, thiurams and thiazoles have certain facilitation to the vulcanization of rubber, when the two coexists, can play collaboration and make
With greatly improving the curingprocess rate and sulphidity of promotor.
Preferably, the zinc oxide is nano zine oxide, nano zine oxide with respect to zinc oxide have bigger specific surface area with
Stronger activity can significantly improve the physical property such as heating conduction, wear-resisting property, tear resistance, the tensile strength of rubber, together
When, lesser amount of nano zine oxide can play the effect of zinc oxide, greatly reduce product cost.
Preferably, the paraffin oil is environmentally friendly paraffin oil.
Preferably, the anti-aging agent is antioxidant 2246, and antioxidant 2246 is phenol antiager, although protection effect is not
Have very prominent, but it has very excellent non-polluting energy, it is environmentally friendly, more meet the requirement of food-grade rubber.
A kind of preparation process of the excellent torn edges natural gum of food-grade odorlessness high resiliency, comprising the following steps:
(1) natural rubber is added in kneading machine, is kneaded 95-105s, continuously adds zinc oxide and stearic acid, is kneaded 65-75s,
Then activating agent and anti-aging agent is added, is kneaded 65-75s, adds white carbon black, yellow color masterbatch and eliminating smell agent, is kneaded 100s；
(2) continue that talcum powder is added in kneading machine and environmentally friendly paraffin oil is kneaded 90-110s, kneading machine is carried out after mixing
It cleans, then to sizing material mixing 115-125s, cleans kneading machine after mixing again, obtain sizing material a；
(3) mixing mixing is carried out to sizing material a, when smelting temperature rises to 130 DEG C, carries out dumping tabletting, bottom sheet 4 in open mill
Secondary, clot slice cools down at least 8h to sizing material, and temperature is not higher than 100 DEG C, obtains sizing material b；
(4) sulphur and promotor are added in sizing material b and vulcanize 60-90s, carry out dumping, sizing material automatic stirring materials on a mill
Slice after 140-155s.
Preferably, the curing temperature is 160 DEG C.
First kneading machine is added in raw rubber and various additives by the present invention in certain sequence, is allowed to after being sufficiently mixed uniformly,
Dumping tabletting in open mill adds the superior promotor of performance under vulcanizing agent and low temperature, is kneaded again after cooling, obtain anti-
Answer sufficient rubber compound.The present invention, by rationally controlling the time of charging sequence and mixing, obtains matter in sizing material mixed process
Measure higher, satisfactory food-grade natural gum.
Of the invention is preferentially:
(1) the product shore hardness that the present invention obtains only has 45 degree or so but has high resiliency and excellent torn edges performance, is
A kind of not have odorous food-grade rubber, environmental protection is practical；
(2) present invention is by auxiliary agent and the optimized process flow of reasonably arranging in pairs or groups, and obtains higher production capacity with less raw material, and compared with
High industrial value and economic benefit.
Specific embodiment
This specific implementation method is only explanation of the invention, is not limitation of the present invention.Those skilled in the art
Member's any change made after having read specification of the invention, as long as within the scope of the claims, it all will be by
To the protection of Patent Law.
Embodiment 1:
A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency, comprises the following components in parts by weight: 100 parts of natural rubber, white
18 parts of carbon black, 55 parts of talcum powder, 14 parts of environmentally friendly paraffin oil, 4 parts of nano zine oxide, 0.8 part of stearic acid, 1.8 parts of activating agent, antioxygen
Agent 2246 be 0.8 part, 0.8 part of yellow color masterbatch, 0.4 part of eliminating smell agent, 1 part of sulphur, 0.5 part of thiurams, 1.3 parts of thiazoles,
Preparation process is as follows:
(1) natural rubber is added in kneading machine, is kneaded 95s, continuously adds zinc oxide and stearic acid, is kneaded 65s, is then added
Activating agent and anti-aging agent are kneaded 65s, add white carbon black, yellow color masterbatch and eliminating smell agent, are kneaded 100s；
(2) continue that talcum powder is added in kneading machine and environmentally friendly paraffin oil is kneaded 90s, kneading machine is carried out after mixing clear
It sweeps, then to sizing material mixing 115s, cleans kneading machine after mixing again, obtain sizing material a；
(3) mixing mixing is carried out to sizing material a, when smelting temperature rises to 130 DEG C, carries out dumping tabletting, bottom sheet 4 in open mill
Secondary, clot slice cools down at least 8h to sizing material, and temperature is not higher than 100 DEG C, obtains sizing material b；
(4) sulphur is added in sizing material b and promotor vulcanizes 60s at 160 DEG C, carries out dumping, sizing material is automatic on a mill
Slice after stirring 140s.
Embodiment 2:
A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency, comprises the following components in parts by weight: 100 parts of natural rubber, white
20 parts of carbon black, 55 parts of talcum powder, 15 parts of environmentally friendly paraffin oil, 5 parts of nano zine oxide, 1 part of stearic acid, 2 parts of activating agent, antioxidant
2246 be 1 part, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, 0.5 part of thiurams, 1.3 parts of thiazoles, is prepared
Technical process is as follows:
(1) be added natural rubber in kneading machine, be kneaded 100s, continuously add zinc oxide and stearic acid, be kneaded 70s, then plus
Enter activating agent and anti-aging agent, be kneaded 70s, add white carbon black, yellow color masterbatch and eliminating smell agent, is kneaded 100s；
(2) continue that talcum powder is added in kneading machine and environmentally friendly paraffin oil is kneaded 100s, kneading machine is carried out after mixing clear
It sweeps, then to sizing material mixing 120s, cleans kneading machine after mixing again, obtain sizing material a；
(3) mixing mixing is carried out to sizing material a, when smelting temperature rises to 130 DEG C, carries out dumping tabletting, bottom sheet 4 in open mill
Secondary, clot slice cools down at least 8h to sizing material, and temperature is not higher than 100 DEG C, obtains sizing material b；
(4) sulphur is added in sizing material b and promotor vulcanizes 80s at 160 DEG C, carries out dumping, sizing material is automatic on a mill
Slice after stirring 150s.
Embodiment 3:
A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency, comprises the following components in parts by weight: 100 parts of natural rubber, white
21 parts of carbon black, 57 parts of talcum powder, 17 parts of environmentally friendly paraffin oil, 6 parts of nano zine oxide, 1.2 parts of stearic acid, 2.2 parts of activating agent, antioxygen
Agent 2246 be 1.2 parts, 1.2 parts of yellow color masterbatch, 0.6 part of eliminating smell agent, 1.5 parts of sulphur, 0.55 part of thiurams, 1.4 parts of thiazoles,
Its preparation process is as follows:
(1) be added natural rubber in kneading machine, be kneaded 105s, continuously add zinc oxide and stearic acid, be kneaded 75s, then plus
Enter activating agent and anti-aging agent, be kneaded 75s, add white carbon black, yellow color masterbatch and eliminating smell agent, is kneaded 100s；
(2) continue that talcum powder is added in kneading machine and environmentally friendly paraffin oil is kneaded 110s, kneading machine is carried out after mixing clear
It sweeps, then to sizing material mixing 125s, cleans kneading machine after mixing again, obtain sizing material a；
(3) mixing mixing is carried out to sizing material a, when smelting temperature rises to 130 DEG C, carries out dumping tabletting, bottom sheet 4 in open mill
Secondary, clot slice cools down at least 8h to sizing material, and temperature is not higher than 100 DEG C, obtains sizing material b；
(4) sulphur is added in sizing material b and promotor vulcanizes 90s at 160 DEG C, carries out dumping, sizing material is automatic on a mill
Slice after stirring 155s.
Comparative example 1:
100 parts of natural rubber, 25 parts of white carbon black, 35 parts of talcum powder, 15 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.3 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 2:
100 parts of natural rubber, 25 parts of white carbon black, 45 parts of talcum powder, 15 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.3 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 3:
100 parts of natural rubber, 25 parts of white carbon black, 35 parts of talcum powder, 15 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 4:
100 parts of natural rubber, 25 parts of white carbon black, 45 parts of talcum powder, 35 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 5:
100 parts of natural rubber, 20 parts of white carbon black, 30 parts of talcum powder, 10 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 6:
100 parts of natural rubber, 20 parts of white carbon black, 35 parts of talcum powder, 10 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
Comparative example 7:
100 parts of natural rubber, 20 parts of white carbon black, 50 parts of talcum powder, 15 parts of paraffin oil, 5 parts of zinc oxide, 1 part of stearic acid, activating agent
2 parts, 1 part of anti-aging agent, 1 part of yellow color masterbatch, 0.5 part of eliminating smell agent, 1.2 parts of sulphur, thiurams 0.5, thiazoles 1.3.
The material of comparative example is prepared into rubber by technique of the invention, while the rubber obtained with embodiment carries out performance ginseng
Several comparisons obtains shown in following two table of result:
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of excellent torn edges natural gum of food-grade odorlessness high resiliency, which is characterized in that comprise the following components in parts by weight: natural
100 parts of rubber, 18-21 parts of white carbon black, 55-57 parts of talcum powder, 14-17 parts of paraffin oil, 4-6 parts of zinc oxide, stearic acid 0.8-1.2
Part, 1.8-2.2 parts of activating agent, 0.8-1.2 parts of anti-aging agent, 0.8-1.2 parts of yellow color masterbatch, 0.4-0.6 parts of eliminating smell agent, sulphur 1-
1.5 parts, 1.7-2 parts of promotor.
2. the excellent torn edges natural gum of a kind of food-grade odorlessness high resiliency according to claim 1, it is characterised in that: the rush
It include thiurams and thiazoles into agent, the weight ratio of the thiurams and thiazoles is 1:2-3.
3. the excellent torn edges natural gum of a kind of food-grade odorlessness high resiliency according to claim 1, it is characterised in that: the oxygen
Change zinc is nano zine oxide.
4. the excellent torn edges natural gum of a kind of food-grade odorlessness high resiliency according to claim 1, it is characterised in that: the stone
Wax oil is environmentally friendly paraffin oil.
5. the excellent torn edges natural gum of a kind of food-grade odorlessness high resiliency according to claim 1, it is characterised in that: described anti-
Old agent is antioxidant 2246.
6. a kind of a kind of preparation process of the excellent torn edges natural gum of food-grade odorlessness high resiliency as described in claim 1, special
Sign is, comprising the following steps:
(1) natural rubber is added in kneading machine, is kneaded 95-105s, continuously adds zinc oxide and stearic acid, is kneaded 65-75s,
Then activating agent and anti-aging agent is added, is kneaded 65-75s, adds white carbon black, yellow color masterbatch and eliminating smell agent, is kneaded 100s；
(2) continue that talcum powder is added in kneading machine and environmentally friendly paraffin oil is kneaded 90-110s, kneading machine is carried out after mixing
It cleans, then to sizing material mixing 115-125s, cleans kneading machine after mixing again, obtain sizing material a；
(3) mixing mixing is carried out to sizing material a, when smelting temperature rises to 130 DEG C, carries out dumping tabletting, bottom sheet 4 in open mill
Secondary, clot slice cools down at least 8h to sizing material, and temperature is not higher than 100 DEG C, obtains sizing material b；
(4) sulphur and promotor are added in sizing material b and vulcanize 60-90s, carry out dumping, sizing material automatic stirring materials on a mill
Slice after 140-155s.
7. a kind of preparation process of the excellent torn edges natural gum of food-grade odorlessness high resiliency according to claim 1, feature
Be: the curing temperature is 160 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246665.5A CN109400973A (en) | 2018-10-25 | 2018-10-25 | A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246665.5A CN109400973A (en) | 2018-10-25 | 2018-10-25 | A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and preparation process |
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| CN109400973A true CN109400973A (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811246665.5A Pending CN109400973A (en) | 2018-10-25 | 2018-10-25 | A kind of excellent torn edges natural gum of food-grade odorlessness high resiliency and preparation process |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007099941A (en) * | 2005-10-05 | 2007-04-19 | Yokohama Rubber Co Ltd:The | Rubber composition |
| CN106928501A (en) * | 2017-03-21 | 2017-07-07 | 青岛六特橡胶有限公司 | A kind of food grade white covering rubber composition and its production technology used for conveyer belt |
-
2018
- 2018-10-25 CN CN201811246665.5A patent/CN109400973A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007099941A (en) * | 2005-10-05 | 2007-04-19 | Yokohama Rubber Co Ltd:The | Rubber composition |
| CN106928501A (en) * | 2017-03-21 | 2017-07-07 | 青岛六特橡胶有限公司 | A kind of food grade white covering rubber composition and its production technology used for conveyer belt |
Non-Patent Citations (3)
| Title |
|---|
| 张殿荣等: "《现代橡胶配方设计》", 31 October 2001, 化学工业出版社 * |
| 橡胶工业原材料与装备简明手册编审委员会编著: "《橡胶工业原材料与装备简明手册(2016年版)》", 31 December 2016, 北京理工大学出版社 * |
| 王梦蛟等: "《橡胶工业手册》", 31 October 1989, 化学工业出版社 * |
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