CN202141662U - Device for testing natural rubber latex total solid content - Google Patents
Device for testing natural rubber latex total solid content Download PDFInfo
- Publication number
- CN202141662U CN202141662U CN201120229746U CN201120229746U CN202141662U CN 202141662 U CN202141662 U CN 202141662U CN 201120229746 U CN201120229746 U CN 201120229746U CN 201120229746 U CN201120229746 U CN 201120229746U CN 202141662 U CN202141662 U CN 202141662U
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- CN
- China
- Prior art keywords
- natural rubber
- rubber latex
- sensing equipment
- solids content
- total solids
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- Expired - Lifetime
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Abstract
The utility model provides a device for testing natural rubber latex total solid content, which comprises a metal container with rated weight, a heater for heating the metal container and a vacuum system for pumping vacuum on the metal container, wherein the metal container is made of foam metal. The device for testing natural rubber latex total solid content is simple in structure, convenient to operate and high in measuring accuracy.
Description
Technical field
The utility model relates to the natural rubber technical field, is specifically related to a kind of sensing equipment of natural rubber latex total solids content.
Background technology
At present on natural rubber measurement and analysis field; Measure the total solids content in the latex; Require more accurate main employing oven for drying method, still this method (needing 8-12 hours) consuming time, power consumption, complex operation are only applicable to measure small amount of sample.For a long time, these those skilled in the art also are difficult to find a kind of quick, easy to operate, strong interference immunity, be near the mark the most again so-called desirable quick total solids content determination method of oven method of precision.
Summary of the invention
The purpose of the utility model provides simple in structure, and is easy to operate, the sensing equipment of the natural rubber latex total solids content that measuring accuracy is high.
For realizing above-mentioned purpose, adopt following technical scheme:
A kind of sensing equipment of natural rubber latex total solids content; Comprise the canister of rated weight, the well heater of the said canister of heating; Described sensing equipment also comprises the vacuum system that described canister is vacuumized, and described canister is a foam metal.
As the preferred implementation of the sensing equipment of the utility model natural rubber latex total solids content, described sensing equipment also is provided with the control system that well heater, vacuum system are controlled.
As the preferred implementation of the sensing equipment of the utility model natural rubber latex total solids content, described sensing equipment also is provided with meausring apparatus.Weighing system can be an electronic balance etc., is integrated in handled easily in the measuring equipment.
As the preferred implementation of the sensing equipment of the utility model natural rubber latex total solids content, described foam metal is coated with metal forming in its side and bottom surface.
As the preferred implementation of the sensing equipment of the utility model natural rubber latex total solids content, described foam metal is a foamed aluminium.
As the preferred implementation of the sensing equipment of natural rubber latex total solids content of the present invention,
The sensing equipment of natural rubber latex total solids content of the present invention, it is simple in structure, and is easy to operate, and measuring accuracy is high: vacuum system provides an airtight negative pressure space, reduces the boiling point of water evaporates, extracts vapor evaporated from latex fast; The canister of rated weight is so that heat conduction and make things convenient for quick metering, and canister adopts acting as of foam metal: 1. in dry the 1st stage of natural rubber latex heat is fast and effeciently conducted to the latex sample interior; 2. in the 2nd and the 3rd stage, hinder glued membrane bubble generation in the heating process, enlarge air--the area of wet glued membrane circle, thus reach quick-drying purpose.
Description of drawings
The structural representation of an embodiment of sensing equipment of Fig. 1 the utility model natural rubber latex total solids content.
Embodiment
For making the utility model be more prone to understand,, further set forth the utility model below in conjunction with specific embodiment.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.
Embodiment 1
A kind of sensing equipment of natural rubber latex total solids content; Comprise the canister of processing by foam metal 6 of rated weight, the electric boiling plate 5 of heating metal container 6; Described sensing equipment also comprises the seal case 1 that described canister 6 is vacuumized; Described sensing equipment also comprises temperature, vacuum tightness and other function control handle 3; Described temperature, vacuum tightness and 3 pairs of electric boiling plates 5 of other function control handle and vacuum pump 2 are controlled, and described sensing equipment also comprises board-like Weighing system 4, and described sensing equipment also comprises digital display screen 7.Described foam metal is coated with metal forming 8 in its side and bottom surface.
Embodiment 2: method of operating
1, (weight that comprises foam metal is ω with one-shot injector a spot of latex sample to be splashed into the vessel of the rated weight of the number of finishing
0) in, the general assembly (TW) ω of weighing sample and vessel
1, according to said method get several samples to be determined ready;
2, ready vessel are placed on the thermal source in the vacuum system, open vacuum switch, make to reach negative pressure state in the system,
3, utilize temperature controller heating-up temperature to be set, set several minutes time, sample is carried out vacuum drying to 80-350 ℃;
4, the sample that drying is finished carries out Weighing together with vessel, obtains weight ω
2Utilize the total solids content α of following formula calculation sample:
Foam metal is that factor of porosity reaches more than 90%, has the porous metals of certain strength and stiffness.This metalloid voids content is high.Its gas penetration potential is very high, nearly all is intercommunicating pore, and pore surface area is big, and material unit weight is very little.Powder metallurgic method is made foam metal, is in powder, to add gas-development agent (like NH4Cl), and the gas-development agent volatilization stays hole during sintering.Can make regular shape hole, porosity up to 95% foam metal with electrochemical deposition method, comprise with Cu, Ni, NiCrFe, ZnCu, NiCu, NiCrW, metal such as NiFe and alloy are the foamed material of skeleton.With the metal that is electrochemically-deposited on the porous body, make deposition component connect into integral body through sintering.The metal material that contains the spumescence pore.Compare with general sintered porous metal, the porosity of foam metal is higher, and aperture size is bigger.Because the two-phase composite material that foam metal is made up of metallic matrix skeleton external phase and pore disperse phase or external phase, so its character depends on used metallic matrix, the porosity and air hole structure, and receives preparation technology's influence.Usually, the mechanical property of foam metal reduces with the increase of the porosity, and the also corresponding exponential relationship that is of its electric conductivity, thermal conductivity reduces.The preparation of foam metal has foaming and electrochemical plating, and the former makes foam metal through adding gas-development agent to the melt metal; The latter is copied into foam metal through electrodeposition technology on the polyurethane foam plastics skeleton.
Practical foam metal has aluminium, nickel and alloy thereof.Foamed aluminium and alloy light weight thereof, therefore nickel foam has ventilated property, high-specific surface area and capillary force, how as functional material because the air hole structure of connection and the high porosity are arranged.
Heveatex is when heat drying, and drying rule meets the Vanderhoff drying theory.Propositions such as Vanderhoff, latex film drying are divided into 3 successive stages.In the 1st stage, free moisture is evaporated from latex with constant rate of speed, and this stage is a constant rate drying period, and when rubber particles begins to be in contact with one another, when the surplus water molecule was filled in the rubber particles space, the 1st stage finished.Got into for the 2nd stage, thereby air--wet glued membrane interfacial area is dwindled and is made rate of drying descend, and condenses up to rubber particles.In the 3rd stage, the water retention of trace spreads through the kapillary diffusion or through glued membrane itself in glued membrane.When the 3rd stage began, the amount of moisture that remains in the glued membrane was considerably less, and air one wet glued membrane interfacial area reduces greatly, so rate of drying also is far smaller than constant rate period.
According to before the drying test of carrying out, we find, if latex is carried out heat drying, in the middle of latter two stage; Rubber hydrocarbon molecule in the latex sample receives thermal polymerization, condenses into to have certain tension force and flexible, and hard-packed glued membrane, the moisture that is vaporized in the middle of the sample is wrapped up by glued membrane; At a plurality of glued membrane bubbles not of uniform size of surperficial and inner formation, reduced air--wet glued membrane interfacial area, hinder the volatilization of moisture; In addition, along with the continuous volatilization of moisture in the latex, remaining dried glue material is the poor conductor of heat; Heat is difficult to effectively conduct to latex inside, and dry run gets into falling-rate period, and moisture is difficult to thoroughly dry.
Because the above-mentioned characteristic of Heveatex, the inventor adopts the assay method of the utility model natural rubber latex total solids content, and its main material that holds the auxilliary material of natural rubber latex is foam metal (like foamed aluminium, a foam copper etc.).Foam metal possesses that specific surface is big, thermal conductivity good, three characteristics in porous foam space are arranged, and in heating process, these three characteristics can guarantee that heat fast and effeciently imports latex inside into; The existence of a large amount of foam voids is arranged; Latex is attracted to wherein, when heating, is difficult to form glued membrane and bubble; Even the temperature height also is difficult to occur boiling phenomenon, it is mild that the mensuration process keeps.That is to say, destroy the formation of glued membrane, enlarge air--the area of wet glued membrane circle reaches quick-drying purpose when being beneficial to the heating natural rubber latex.
Simultaneously, metal foam adopts standard specification (having norminal size, rated weight, specified porosity and fixed shape) as far as possible.Have the standardized production that norminal size and solid shape are beneficial to metal foam, be easy to assay method and other auxilliary material supporting; Have rated weight, then be beneficial to and improve measuring accuracy and measure precision; Having specified porosity makes metal foam reach certain promotion water evaporates effect.
Embodiment 3
The fresh Heveatex of samples using glue on same day factory purchase spot purchase.
1, measure total solids content with the standard ovens oven drying method: use one-shot injector, get latex 2～3 grams and measure, 70 ℃ of bake out temperatures, are done three groups of specimen tests at 10 hours time;
ω
0: vessel weight;
ω
1: vessel and latex general assembly (TW) before measuring;
ω
2: drying finish vessel and latex general assembly (TW);
2, measure total solids content (adopting the equipment of embodiment 1 and the method for embodiment 2) with boulton process: use one-shot injector; Get latex 0.2～2 gram and measure 200 ℃ of baking temperatures, vacuum tightness-0.09Mpa; 3 minutes time, do three groups of specimen tests;
ω
0: vessel weight;
ω
1: vessel and latex general assembly (TW) before measuring;
ω
2: drying finish vessel and latex general assembly (TW);
Conclusion: boulton process and the accuracy of this products measure and oven drying method basically identical, but its sample thief amount is little and finding speed far away faster than traditional oven for drying method.
Should be noted that at last; Above embodiment is only in order to the technical scheme of explanation the utility model but not to the restriction of the utility model protection domain; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model, and do not break away from the essence and the scope of the utility model technical scheme.
Claims (6)
1. the sensing equipment of a natural rubber latex total solids content; Comprise the canister of rated weight, the well heater of the said canister of heating; It is characterized in that; Described sensing equipment also comprises the vacuum system that described canister is vacuumized, and described canister is a foam metal.
2. the sensing equipment of natural rubber latex total solids content according to claim 1 is characterized in that, described sensing equipment also is provided with the control system that well heater, vacuum system are controlled.
3. the sensing equipment of natural rubber latex total solids content according to claim 1 and 2 is characterized in that, described sensing equipment also is provided with meausring apparatus.
4. the sensing equipment of natural rubber latex total solids content according to claim 1 and 2 is characterized in that, described foam metal is coated with metal forming in its side and bottom surface.
5. the sensing equipment of natural rubber latex total solids content according to claim 1 is characterized in that, described foam metal is a foamed aluminium.
6. the sensing equipment of natural rubber latex total solids content according to claim 1 is characterized in that, described sensing equipment also includes seal box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120229746U CN202141662U (en) | 2011-07-01 | 2011-07-01 | Device for testing natural rubber latex total solid content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120229746U CN202141662U (en) | 2011-07-01 | 2011-07-01 | Device for testing natural rubber latex total solid content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202141662U true CN202141662U (en) | 2012-02-08 |
Family
ID=45552717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120229746U Expired - Lifetime CN202141662U (en) | 2011-07-01 | 2011-07-01 | Device for testing natural rubber latex total solid content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202141662U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252938A (en) * | 2011-07-01 | 2011-11-23 | 刘光辉 | Method and equipment for measuring total solid matter content of natural rubber latex |
| CN113640172A (en) * | 2021-08-25 | 2021-11-12 | 北京建筑大学 | Device and method for testing film forming rate of polymer emulsion |
-
2011
- 2011-07-01 CN CN201120229746U patent/CN202141662U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252938A (en) * | 2011-07-01 | 2011-11-23 | 刘光辉 | Method and equipment for measuring total solid matter content of natural rubber latex |
| CN102252938B (en) * | 2011-07-01 | 2013-04-03 | 刘光辉 | Method and equipment for measuring total solid matter content of natural rubber latex |
| CN113640172A (en) * | 2021-08-25 | 2021-11-12 | 北京建筑大学 | Device and method for testing film forming rate of polymer emulsion |
| CN113640172B (en) * | 2021-08-25 | 2024-05-07 | 北京建筑大学 | Device and method for testing film forming rate of polymer emulsion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120208 Effective date of abandoning: 20130403 |
|
| RGAV | Abandon patent right to avoid regrant |