CN111410704A - Latex coagulant containing pineapple plant extract - Google Patents
Latex coagulant containing pineapple plant extract Download PDFInfo
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- CN111410704A CN111410704A CN202010388093.5A CN202010388093A CN111410704A CN 111410704 A CN111410704 A CN 111410704A CN 202010388093 A CN202010388093 A CN 202010388093A CN 111410704 A CN111410704 A CN 111410704A
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- 239000000701 coagulant Substances 0.000 title claims abstract description 66
- 229920000126 latex Polymers 0.000 title claims abstract description 64
- 239000004816 latex Substances 0.000 title claims abstract description 64
- 235000007119 Ananas comosus Nutrition 0.000 title claims abstract description 61
- 239000000419 plant extract Substances 0.000 title claims abstract description 19
- 244000099147 Ananas comosus Species 0.000 title 1
- 241000234671 Ananas Species 0.000 claims abstract description 87
- 229920001971 elastomer Polymers 0.000 claims abstract description 53
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000706 filtrate Substances 0.000 claims abstract description 12
- 244000043261 Hevea brasiliensis Species 0.000 claims description 17
- 229920003052 natural elastomer Polymers 0.000 claims description 17
- 229920001194 natural rubber Polymers 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 229920006173 natural rubber latex Polymers 0.000 claims description 4
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 4
- 239000004299 sodium benzoate Substances 0.000 claims description 4
- 235000010234 sodium benzoate Nutrition 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 7
- 239000000047 product Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 10
- 238000003860 storage Methods 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 230000015271 coagulation Effects 0.000 description 9
- 238000005345 coagulation Methods 0.000 description 9
- 239000004365 Protease Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 108091005804 Peptidases Proteins 0.000 description 4
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 229920001277 pectin Polymers 0.000 description 4
- 235000019419 proteases Nutrition 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 108010004032 Bromelains Proteins 0.000 description 3
- 235000019835 bromelain Nutrition 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 239000001814 pectin Substances 0.000 description 3
- 235000010987 pectin Nutrition 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 241001441571 Hiodontidae Species 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000013325 dietary fiber Nutrition 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000013997 pineapple juice Nutrition 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 102000018697 Membrane Proteins Human genes 0.000 description 1
- 108010052285 Membrane Proteins Proteins 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000009852 coagulant defect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229940013712 pineapple extract Drugs 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000152 severe skin burn Toxicity 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/14—Coagulation
- C08C1/15—Coagulation characterised by the coagulants used
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses latex coagulant containing pineapple plant extracts, wherein the latex coagulant takes 10-15 parts of pineapple pulp, 20-25 parts of pineapple peel, 7-8 parts of pineapple plant stems and 5-6 parts of pineapple plant leaves as raw materials in parts by mass, and the obtained filtrate is filtered after juicing to obtain the latex coagulant. The physical and chemical properties of the crude rubber SCR WF product obtained by adopting the latex coagulant can reach the national standard GB/T8081-2018 guide rule of specification of natural crude rubber technology graded rubber (TSR).
Description
Technical Field
The application relates to a latex coagulant containing pineapple plant extracts, belonging to the technical field of synthesis technology of novel rubber and preparation of new rubber materials.
Background
At present, a latex coagulant is usually required to be used in the production of full latex, the used latex coagulants are industrial chemicals such as formic acid, sulfuric acid, acetic acid and the like, only the sulfuric acid is adopted as the coagulant for the coagulation of latex clear gel at present, and the strong acid chemicals have potential safety hazards in the processes of transportation, storage, circulation, sale, use and the like. When the strong acid is used in glue farmers and glue factories, the strong acid is contacted with the skin to cause severe skin burn due to improper operation or unskilled operators.
Meanwhile, the latex is coagulated by using an industrial strong acid coagulant, so that the acid content of the wastewater generated in production is large, and the pH value range is 4-6. The waste water acidity is too strong, the change of the pH value is large during the waste water treatment, anaerobic bacteria and aerobic bacteria used in the waste water treatment are difficult to survive and die, the waste water treatment effect is poor, and especially when the single-day yield fluctuation of latex is large, the waste acid treated according to the normal process can not even reach the discharge standard.
The existing strong acid coagulator has large addition amount in latex, and the latex product obtained after coagulation has low strength and poor product consistency.
The bromelain extracted from pineapple juice is used as a biological coagulant of natural rubber at home and abroad, but the defects that the extraction cost of the bromelain is high, the activity of the bromelain in the extract is low, and the sugar content of the coagulant extracted from pineapple pulp is high, so that the pineapple pulp is difficult to store exist.
When the pineapple extract is used as a coagulant, the obtained raw rubber still has the problem of high initial plasticity (P0) value, and meanwhile, the plasticity retention rate (also called as antioxidant index, PRI) of the coagulated rubber is obviously reduced within 16 hours of storage, so that the processing performance of the raw rubber after storage is influenced.
Disclosure of Invention
The application provides a latex coagulant containing pineapple plant extracts, which is used for solving the problems that the waste water contains a large amount of acid and is difficult to purify by using strong acid as the latex coagulant; the initial value of the plasticity of the raw rubber obtained after solidification is higher, and the plasticity retention rate is seriously reduced.
The application provides a latex coagulant containing pineapple plant extracts, which takes 10-15 parts of pineapple pulp, 20-25 parts of pineapple peel, 7-8 parts of pineapple plant stems and 5-6 parts of pineapple plant leaves as raw materials by mass, and the obtained filtrate is filtered after juicing to obtain the latex coagulant.
Pineapple plants are referred to herein as pineapple plants.
The pineapple pulp, the peel, the stem and the leaves which are mixed according to the proportion are taken as raw materials, crushed and juiced, and the obtained filtrate can be used as a latex coagulant. The obtained latex coagulant fully utilizes mineral elements, total sugar and crude fiber contained in pineapple peels, stalks and leaves, increases the toughness and the processing characteristics of raw rubber after coagulation, reduces the P0 value of the raw rubber and keeps PRI within 16 hours of raw rubber storage while meeting GB/T8081-2018' guide rule of specification of natural raw rubber technology grading rubber (TSR), thereby effectively keeping the plasticity of the raw rubber and facilitating processing treatment.
After the natural latex and the enzyme are coagulated and mixed, the content of some non-rubber substances, especially the change of protein is more obvious, which affects various technical indexes of the natural rubber and improves the protein content and various performances of the natural rubber, such as physicochemical performance, vulcanization characteristic, crosslinking density, mechanical property, processing performance, internal heat generation and the like.
The stem, leaf and peel of pineapple plant contain protease, saccharide, organic acid, protein, fat, etc., wherein the protease can destroy the protein on the surface layer of colloidal particles, the saccharide and the organic acid can be utilized by bacteria, and the generated organic acid can also destroy the stability of latex and promote the flocculation of the latex. The stems, leaves and peels of the pineapples belong to wastes after the pineapples are harvested, the natural rubber biological coagulant extracted from the pineapples can effectively save the production cost, and the stems, leaves and peels of the pineapples have low sugar content, so that the pineapple storage time can be prolonged, and the pineapple storage is convenient. The recycling of the stems, leaves and peels of the pineapple plants can also increase the income of fruit growers.
Preferably, the raw materials comprise 13 parts of pineapple pulp, 22 parts of pineapple peel, 8 parts of pineapple plant stem and 6 parts of pineapple plant leaf in parts by mass. After the pineapple pulp, the peel, the stem and the leaves are married according to the proportion, the P0 value of the raw rubber after solidification is the lowest.
Preferably, the raw materials comprise, by mass, 10 parts of pineapple pulp, 20 parts of pineapple peel, 7 parts of pineapple plant stem and 5 parts of pineapple plant leaf. After the pineapple pulp, the peel, the stem and the leaf are married according to the proportion, the PRI value of the solidified crude rubber stored for 1 month is minimum.
Preferably, the raw materials comprise, by mass, 15 parts of pineapple pulp, 25 parts of pineapple peel, 7 parts of pineapple plant stem and 6 parts of pineapple plant leaf. In this combination, the pineapple plant leaves comprise: cellulose, lignin, pectin, wax. The pectin and wax contained in the raw rubber can increase the flexibility and plasticity retentivity of the raw rubber after solidification, thereby improving the Meniere stress relaxation coefficient of the obtained raw rubber and obtaining better processing fluidity.
Preferably, sodium benzoate in an amount of 0.05% by mass of the latex coagulant is added to the latex coagulant, and the mixture is sufficiently and uniformly stirred and then stored. By adding sodium benzoate into the obtained filtrate, the quality guarantee period of the coagulant effect of the filtrate can be effectively prolonged, and protease inactivation is avoided.
By adding sodium benzoate, the coagulation effect of the obtained filtrate can be ensured to be consistent with that of a freshly squeezed coagulant within 7 days after the filtrate is prepared. In order to ensure the coagulation effect, the obtained filtrate should not have a maximum shelf life of more than 7 days.
Preferably, the juicing operation is performed after the raw materials are mixed, washed and crushed.
Preferably, in the filtering step, the liquid obtained from the juicing operation is sequentially filtered by a filter screen with the aperture of 60 meshes and a filter screen with the aperture of 400 meshes to obtain the filtrate. The aperture filter screen is adopted for filtering in sequence, so that impurities can be reduced, and the effective plant fiber content is improved.
In another aspect of the present application, a method for producing a standard raw rubber of natural rubber is provided, which comprises the following steps:
a. taking the latex coagulant according to 0.4-7 per thousand of the mass of dry glue per ton, and mixing the latex coagulant with water according to the mass ratio of 1:100 to obtain a coagulant solution;
b. uniformly mixing a coagulant solution and natural rubber latex, and standing until the latex is completely coagulated to obtain latex;
c. and dehydrating and drying the latex to obtain the natural rubber standard raw rubber.
The standard crude rubber P0 value of the natural rubber produced by the method provided by the application is reduced, the PRI value is effectively maintained in storage, and the processability retention time of the crude rubber is prolonged, so that the crude rubber can maintain the required processing capacity before being transported to a processing production place. The physical and chemical properties of the crude rubber SCR WF product obtained by the method all reach the national standard GB/T8081-2018 guide rule of specification of natural crude rubber technology graded rubber (TSR).
Wherein the dry rubber refers to the natural rubber standard raw rubber obtained after drying in the step c.
The beneficial effects that this application can produce include:
1) according to the preparation method of the latex coagulant containing the pineapple plant extract, pineapple pulp, peel, leaves and stalks are mixed according to the proportion, the squeezed juice is used as the latex coagulant, dietary fibers contained in pineapple can be effectively extracted, and the dietary fibers are wound into amino acid flocculates while protease decomposes surface protein of colloidal particles, so that the strength of the coagulated latex is enhanced, the P0 value of raw rubber is reduced, and the PRI value of the raw rubber is kept to be small within 16 hours of storage.
2) According to the preparation method of the latex coagulant containing the pineapple plant extract, the stems, leaves and peels of pineapples belong to waste after pineapple harvesting, the natural rubber biological coagulant extracted from the pineapple plant extract can effectively save production cost, and the pineapple stems, leaves and peels are low in sugar content, long in storage time and convenient to store. The recycling of the stems, leaves and peels of the pineapple plants can also increase the income of fruit growers.
3) The latex coagulant containing the pineapple plant extract coagulates latex with the pineapple plant extract, the pH value of produced wastewater is close to neutral, the use process is safe, environment-friendly and low in cost, and the production wastewater is easy to treat. The generated wastewater is beneficial to the growth of microorganisms in the subsequent wastewater treatment, can effectively shorten the sewage treatment time, and reaches the discharge standard after treatment.
4) The latex coagulant containing the pineapple plant extract provided by the application takes pineapple leaves as a raw material, and pectic substances and wax substances contained in the pineapple leaves can increase the flexibility and plasticity retentivity of raw rubber after coagulation, so that the Meniere stress relaxation coefficient in the obtained raw rubber is improved, and better processing fluidity is obtained.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Examples
Unless otherwise specified, the raw materials, solvents and natural rubber latex in the examples of the present application were purchased commercially without being processed.
Example 1 preparation of latex coagulant samples 1-3 containing pineapple plant extract
Weighing pineapple pulp, pineapple peel, pineapple plant stems and pineapple plant leaves as raw materials, mixing, cleaning and crushing the raw materials, carrying out juicing operation, filtering by using a filter screen with the aperture of 60 meshes to obtain first filtrate, and filtering by using a filter screen with the aperture of 400 meshes to obtain the latex coagulant.
The mass parts of the raw materials used in the latex coagulant samples 1 to 3 are shown in table 1.
Comparative example 1 preparation of latex coagulant sample D1
The difference from example 1 is that 10 parts by weight of pineapple peel is used as the raw material.
Example 2 preparation of Natural rubber Standard crude rubber samples 1-3
a. Taking 1-3 samples of the latex coagulant obtained in example 1 according to 4-7 per thousand of the mass of dry glue per ton, and mixing the latex coagulant with water according to the mass ratio of 1:100 to obtain a coagulant solution;
b. uniformly mixing the coagulant solution with the natural rubber latex, and standing for 4 hours until the latex is completely coagulated to obtain latex;
c. and dehydrating and drying the latex to obtain the natural rubber standard raw rubber.
The latex coagulant samples used in the natural rubber standard crude rubber samples 1-3 are listed in Table 1.
TABLE 1
Comparative example 2 preparation of Natural rubber Standard crude rubber sample D1
The difference from example 2 is that the latex coagulant used was latex coagulant sample D1, resulting in natural rubber Standard crude rubber sample D1.
Example 3 Natural rubber Standard crude rubber samples 1-3 and D1 Performance test
The obtained raw rubber samples 1 to 3 and D1 were tested according to the conventional test method, and the test items and the obtained results are shown in Table 2.
Wherein the rate of change of PRI value is calculated as follows:
the PRI value change rate (PRI value at 0 after raw rubber set-PRI value at 1 month after raw rubber set)/PRI value at 0 after raw rubber set.
Mooney viscosity machine test: mooney viscosity testing was performed according to GB/T1232-2016, after which the rotor was quickly stopped and the decay of the Mooney viscosity values over time within Zmin was recorded, the results are shown in Table 2.
In table 2, Rlx _ X30 is a change (%) in the mooney viscosity value after 30 seconds from 1s after the motor was stopped; rlx _ a is an index a (measured relaxation stress ratio) value. The larger the Rlx _ X30 value is, the faster the Mooney relaxation rate is, and the smaller the Rlx _ a index a is, the better the flowability of the raw rubber in processing is.
TABLE 2
a. The national standard is GB/T8081-2018 guide rule for specification of natural raw rubber technology graded rubber (TSR)
As can be seen from Table 2, the juice extracted from the ingredients disclosed in the prior art using only pineapple peel, as a coagulant, gave a higher P0 value for raw gum, much higher than 34 obtained by formic acid coagulation. After the coagulant is provided, a large amount of plant fibers contained in the pineapple stems and the pineapple plant leaves are fully utilized, the initial plastic value is improved, raw gum is convenient to separate and store, a good coagulation effect can be realized, and meanwhile, various physical and chemical performance indexes of the obtained raw gum can meet the national standard requirements, and the coagulant is fully proved to be capable of replacing the existing formic acid coagulant for use.
Meanwhile, the coagulant provided by the application can also be beneficial to keeping the PRI value of the obtained raw rubber in the storage process, has small change, is beneficial to keeping the plasticity of the raw rubber and is beneficial to production.
As can be seen from Table 2, the processing flowability of the raw gum obtained by the present application can be effectively improved by using the coagulant provided by the present application, and the results obtained in the Mooney stress relaxation test are all superior to those of the raw gum obtained in D1, which indicates that the flowability of the raw gum obtained after coagulation can be effectively improved by using the coagulant provided by the present application due to the addition of the pineapple juice rich in pectin and wax.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the disclosure to effect such feature, structure, or characteristic in connection with other embodiments.
Although the present application has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (8)
1. The latex coagulant containing the pineapple plant extract is characterized in that 10-15 parts of pineapple pulp, 20-25 parts of pineapple peel, 7-8 parts of pineapple plant stem and 5-6 parts of pineapple plant leaf are taken as raw materials in parts by mass, squeezed and filtered to obtain filtrate as the latex coagulant.
2. The latex coagulant according to claim 1, wherein sodium benzoate is added to the latex coagulant in an amount of 0.05% by mass of the latex coagulant, and the mixture is stirred sufficiently and uniformly and then stored.
3. The pineapple plant extract-containing latex coagulant as claimed in claim 1, wherein said raw materials are subjected to said juicing operation after being mixed, washed and pulverized.
4. The pineapple plant extract-containing latex coagulant as claimed in claim 1, wherein in the filtration step, the liquid obtained in the juicing operation is sequentially filtered through screens having a pore size of 60 mesh and 400 mesh to obtain the filtrate.
5. The pineapple plant extract-containing latex coagulant according to any one of claims 1 to 4, wherein the raw materials include, by mass, 13 parts of pineapple pulp, 22 parts of pineapple peel, 8 parts of pineapple plant stem, and 6 parts of pineapple plant leaf.
6. The pineapple plant extract-containing latex coagulant according to any one of claims 1 to 4, wherein the raw materials include, by mass, 10 parts of pineapple pulp, 20 parts of pineapple peel, 7 parts of pineapple plant stem, and 5 parts of pineapple plant leaf.
7. The pineapple plant extract-containing latex coagulant according to any one of claims 1 to 4, wherein the raw materials include, by mass, 15 parts of pineapple pulp, 25 parts of pineapple peel, 7 parts of pineapple plant stem, and 6 parts of pineapple plant leaf.
8. The production method of the standard raw rubber of the natural rubber is characterized by comprising the following steps:
a. taking the latex coagulant according to any one of claims 1 to 7 in a mass ratio of 0.4 to 7 per thousand of the mass of dry rubber per ton, and mixing the latex coagulant with water in a mass ratio of 1:100 to obtain a coagulant solution;
b. uniformly mixing a coagulant solution and natural rubber latex, and standing until the latex is completely coagulated to obtain latex;
c. and dehydrating and drying the latex to obtain the natural rubber standard raw rubber.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111875718A (en) * | 2020-08-11 | 2020-11-03 | 黄茂芳 | Natural latex composite coagulant |
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2020
- 2020-05-09 CN CN202010388093.5A patent/CN111410704A/en active Pending
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|---|---|---|---|---|
| CN1341379A (en) * | 2000-09-03 | 2002-03-27 | 蒋才国 | Milk fruit vegetable juice composite gelled soymilk |
| KR20140086903A (en) * | 2012-12-28 | 2014-07-08 | 함양군 | Mixture beverage of fruits and vegetables containing Momordica charantia and preparation method thereof |
| CN105669881A (en) * | 2016-03-07 | 2016-06-15 | 黎春柏 | Biological double-acid bacterium natural rubber latex coagulator and preparation method thereof |
| CN109624179A (en) * | 2019-01-25 | 2019-04-16 | 温州超泰乳胶制品有限公司 | Without ammonia natural latex products production technology |
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| Title |
|---|
| 林文光等: "菠萝果皮蛋白酶的活性研究", 《云南热作科技》 * |
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| CN111875718A (en) * | 2020-08-11 | 2020-11-03 | 黄茂芳 | Natural latex composite coagulant |
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