Background technology
In container transport by sea or storage process, container tends to experience ocean high humidity weather and stronger day and night temperature changes, and can produce " container rain ", and the water of this liquid state can produce serious influence to the external packing of goods in the container or goods.
Container drier main component is with Concave-convex clay rod, montmorillonite and calcium chloride at present; It is that to adopt calcium chloride merely be primary raw material that the higher container drier of a kind of hydroscopicity is arranged; Though the hydroscopicity of calcium chloride is high; But generate aqueous water after the moisture absorption; Be easy to from container desiccant package material, leak out, pollute the external packing of interior goods of container and container or goods.
Chinese patent publication number CN 101637691 A; Open day on 02 03rd, 2010; Name is called " a kind of preparation method of container drier "; Disclose " preparation method of the drier that a kind of counter is special-purpose, it is that the converted starch of 60%~80% calcium chloride and 20%~40% is packed into to seal in the Du Pont paper bag and got final product with mass percent; Because the moisture in the counter can get in the packaging bag through Du Pont's paper bag and contact with calcium chloride and converted starch; Calcium chloride has good water sorption; Moisture content can be solidified as for converted starch; So this product moisture sorption effect is good, can guarantee effectively that the goods in the counter is in drying regime; Because the steam advantages of good adsorption effect of this product, and cost of manufacture is low, thereby be widely used on the counter drying ".
The weak point of above-mentioned patent is to use " converted starch " that moisture content is solidified in this technology; Directly have influence on the practical effect of container drier; Because the water content of converted starch is 15%~21%, the amount that converted starch self can solidify the moisture content of calcium chloride absorption is also little.
Adopt the container drier of 100 grams to calculate; Charge ratio is 60% calcium chloride and 40% converted starch; 60 gram calcium chloride in the container drier of 100 grams can adsorb moisture >=60 grams in the counter, and the converted starch of 40 grams can't solidify the moisture of 60 grams.
The converted starch purchase cost is higher, is unfavorable for applying.
Summary of the invention
The objective of the invention is to overcome weak point in the prior art, a kind of powdery container drier that hydroscopicity is high and adsorbed moisture can be cured that has is provided.
Powdery container drier is made up of Concave-convex clay rod, sulfuric acid, calcium chloride and high hydroscopic resin.
The production method of powdery container drier: Concave-convex clay rod is carried out pulverizing jointly with calcium chloride and high hydroscopic resin after acidifying, compressing tablet and the heat treatment, be packaged as powdery container drier.
Concave-convex clay rod be a kind of have a layer chain structure contain Shuifu County's zeopan clay mineral; Water imbibition is strong; Tool viscosity and plasticity when wet; The acidified processing of Concave-convex clay rod back is generated sulfate mixtures such as part of sulfuric acid magnesium and aluminum sulfate; Magnesium sulfate and aluminum sulfate all have higher wettability power; Again the Concave-convex clay rod of acidification is heat-treated, improved the moisture sorption effect of Concave-convex clay rod greatly.
Calcium chloride is soluble in water, and hygroscopicity is extremely strong, is exposed in the air very easily deliquescence, and the calcium chloride hygroscopic capacity is greater than the weight of calcium chloride self, and the present invention selects anhydrous calcium chloride for use, the content of calcium chloride >=90%.
The water absorption of high hydroscopic resin is big, can reach hundreds of times even thousands of times of sole mass, can in the several seconds, generate gel after the suction, and water-retaining property is strong.High hydroscopic resin is used for the present invention can rapid the expansion be converted into the gel solid body with the water of powdery container drier absorption; This gel solid body is called solid water; Even under low temperature, pressurized conditions, also be difficult for dehydration; Good stability to light, heat, cold-peace soda acid; Have favorable biological degradability can, the grain fineness of the high hydroscopic resin that the present invention selects for use≤0.1 millimeter.
The present invention is achieved through following technical proposals:
1, the batching of powdery container drier is made up of following component by weight percentage: the Concave-convex clay rod 10~35% after the acidification, calcium chloride 64~89% and high hydroscopic resin 0.01~3%;
The production method of powdery container drier: input pulverizer after the batch mixes of powdery container drier is pulverized, and the grain fineness after the pulverizing≤0.105 millimeter packs and is powdery container drier;
The production method of the Concave-convex clay rod after the said acidification: 1. Concave-convex clay rod is pulverized the grain fineness after the pulverizing≤0.50 millimeter; 2. the preparation of dilute sulfuric acid is made up of following component by weight percentage: sulfuric acid 1~20% and the water 80~99% of concentration 98 ﹪; 3. the batching of acidification is made up of following component by weight percentage: Concave-convex clay rod 55~75% and dilute sulfuric acid 25~45%; 4. dilute sulfuric acid is slowly added and carry out acidification in the Concave-convex clay rod, the Concave-convex clay rod of acidified processing was stacked after 24~72 hours, and extruding is tablet in the input twin rollers, the thickness of tablet≤3 millimeter; 5. tablet being imported and being heat-treated the back in the rotary dryer is the Concave-convex clay rod after the acidification; Temperature during heat treatment is controlled at 250~320 ℃; Time was controlled at 60~180 minutes, the water content of the Concave-convex clay rod after the acidification≤1.0%.
Acidification technology of the present invention does not have discharge of wastewater, and method is simple, and is environment friendly and pollution-free.
After powdery container drier added measuring cup, placing in the drier that fills saturated aqueous sodium chloride, is under 25 ℃ the condition in temperature, 24 hours Static Water absorption >=35%.
Powdery container drier is placed in the container; Can promptly the moisture in the container be absorbed; When powdery container drier adsorbs in the container when generating aqueous water behind the moisture in a large number, high hydroscopic resin absorbs the back with aqueous water and expands rapidly and be converted into the gel solid body.
Concave-convex clay rod after the acidification is in the absorption container in the moisture; The aqueous water that can also adsorb gel solid body surface; And become an integral body with the adhesion of gel solid body; Therefore; The generation aqueous water be can not transform once more behind the moisture in the powdery container drier absorption container, seepage and the phenomenon of dripping avoided from packaging material, taking place;
Powdery container drier can adsorb the moisture in the container efficiently, lastingly, has to surpass effective wettability power of 60 days, keeps metastable standard humidity in the container, prevents the cargo damage problem that container takes place because of the dewfall of making moist.
Powdery container drier is cheap, and result of use is remarkable, does not pollute degradable, after the dismounting packing, can be used as general waste treatment.
Powdery container drier is applicable to and is placed on and need carries out in the delivery container of dry-run protection fast.
The specific embodiment
Below in conjunction with embodiment the present invention is done further description:
1, the batching of powdery container drier is made up of following component by weight percentage: the Concave-convex clay rod 16% after the acidification, calcium chloride 83.5% and high hydroscopic resin 0.5%;
The production method of powdery container drier: input pulverizer after the batch mixes of powdery container drier is pulverized, and the grain fineness after the pulverizing≤0.105 millimeter packs and is powdery container drier;
The production method of the Concave-convex clay rod after the said acidification: 1. Concave-convex clay rod is pulverized the grain fineness after the pulverizing≤0.50 millimeter; 2. the preparation of dilute sulfuric acid is made up of following component by weight percentage: sulfuric acid 5% and the water 95% of concentration 98 ﹪; 3. the batching of acidification is made up of following component by weight percentage: Concave-convex clay rod 68% and dilute sulfuric acid 32%; 4. dilute sulfuric acid is slowly added and carry out acidification in the Concave-convex clay rod, the Concave-convex clay rod of acidified processing was stacked after 48 hours, and extruding is tablet in the input twin rollers, the thickness of tablet≤1.5 millimeter; 5. tablet being imported and being heat-treated the back in the rotary dryer is the Concave-convex clay rod after the acidification, and the temperature during heat treatment is controlled at 300~320 ℃, and the time was controlled at 90 minutes, the water content of the Concave-convex clay rod after the acidification≤1.0%.
Through on-the-spot test, behind graininess container drier adding measuring cup, place in the drier that fills saturated aqueous sodium chloride; Be under 25 ℃ the condition in temperature; 24 hours >=84%, 72 hours Static Water of Static Water absorption >=72%, 48 hours Static Water absorption absorption >=92%.