CN102031074B - Corrugated cardboard production line adhesive and method for preparing same - Google Patents

Abstract

The invention provides a corrugated cardboard production line adhesive and a method for preparing the same. The corrugated cardboard production line adhesive is characterized by prepared from the following components by weight part: 150-200 parts of corn starch, 2-8 parts of caustic soda containing over 95 percent of solid, 0-5 parts of potassium permanganate, 2-7 parts of borax, 6-10 parts of bridging agent, 0-3 parts of defoaming agent and 500-1,000 parts of water. The corrugated cardboard production line adhesive has the advantages of low preparation and use temperature, high adhesion strength, improved performance, low cost, and reasonable and simple preparation method, becomes dry quickly and is environmentally friendly.

Description

Corrugated cardboard production line adhesive and preparation method thereof

Technical field

The invention belongs to tackiness agent manufacturing technology field, for the improvement of the adhesive techniques of corrugated paper board production line, is a kind of corrugated cardboard production line adhesive and preparation method thereof specifically particularly.

Background technology

As everyone knows, the formation of corrugated cardboard be unable to do without starch adhesive.The Main Function of starch adhesive is bonding fluting board and facial tissue, forms corrugated cardboard.The present employed starch adhesive of most of Carbon enterprise mainly is rubber.The shortcoming of this rubber is poor stability, it is complicated to make, and viscosity is unstable, the time degumming phenomenon is arranged, loss is large, and gelatinization point is higher.

The problem that tradition heat setting type corrugated paper board production line exists with glue paste:

1, glue paste is glue.What of moisture the consumption of glue directly have influence on.The molecular structure of tradition W-Gum has determined the water content of glue.Because be less than 65% moisture, starch can gelatinization, does not produce viscosity, and glue consumption lacked can not be bonding.When the water regain of paper surpasses glue and contains water inventory 20% in 20 seconds, the moisture content in the glue very little can not with starch pasting, therefore, also naturally just can not be bonding.The moisture of evaporation can affect the intensity of paper after the ratio of water heated in the process of bonding gelatinization in traditional glue that can be bonding.

2, temperature.The gelatinization of starch is decided by temperature.Temperature is high, and the corresponding quickening of the speed of a motor vehicle underspeeds thereby temperature is low, and needs the temperature of gelatinization must rely on the energy.The water content of glue 65%-85% must be come heating, drying by the energy in addition, therefore, has also caused the cost rising.

3, high-temperature load, wear and tear in machines.High temperature makes expansion of metal, and the different material coefficients of expansion differ, and therefore load increases, thereby the motor power consumption increases.And machine is along with the rising of temperature, and wearing and tearing strengthen, and shorten work-ing life, increased use cost.

4, environmental protection.Burning of coal certainly will produce carbonic acid gas and dust, havoc and contaminate environment.And coal and oil have also directly brought the high manufacturing cost of product.

Therefore, demand at present studying a kind of corrugated cardboard production line adhesive and preparation method thereof urgently, make adhesive glue become normal temperature or low temperature adhesion glue, it can fundamentally substitute traditional rubber, realizes the benefit of efficient, energy-conservation, reduction of discharging, environmental protection.

Summary of the invention

The present invention be directed to the problem that the used glue paste of present heat setting type corrugated paper board production line exists, a kind of corrugated cardboard production line adhesive is provided, substitute traditional rubber, have preparation and use temperature is low, bond strength is high, quick-drying, environmental protection and the low characteristics of use cost.A kind of preparation method of corrugated cardboard production line adhesive also is provided, and technique rationally, simple and preparation temperature is low, and the bond properties of adhesive glue is improved.

The objective of the invention is to be achieved through the following technical solutions: a kind of corrugated cardboard production line adhesive, it is characterized in that, each component by weight proportioning is:

W-Gum 150-200 part

Solid content caustic soda 2-8 part more than 95%

Potassium permanganate 0-5 part

Borax 2-7 part

Bridging agent 6-10 part

Defoamer 0-3 part

Water 500-1000 part

A kind of preparation method of corrugated cardboard production line adhesive is characterized in that,

Each component by weight proportioning is:

W-Gum 150-200 part

Solid content caustic soda 2-8 part more than 95%

Potassium permanganate 0-5 part

Borax 2-7 part

Bridging agent 6-10 part

Defoamer 0-3 part

Water 500-1000 part

The adhesive glue making step is as follows:

According to the prescription requirement, the glue tank injects clear water, opens steam valve and heats, and room temperature is more than 28 degrees centigrade, and water temperature is controlled at 30-32 degree centigrade; Room temperature is at 23-28 degree centigrade, and water temperature is controlled at 35-37 degree centigrade; Room temperature is below 23 degrees centigrade, and water temperature is controlled at 38-43 degree centigrade;

Put glue tank warm water into stirred pot, add alkali for the first time, stirred one minute;

Throw W-Gum, stirred 8-15 minute;

For the second time add alkali, slowly add, stir while adding, use the flow cup tested viscosity;

The single-side machine viscosity controller is in 17-18 second;

Add the every tank 6-10kg of bridging agent, stirred 3-8 minute;

Add borax and stirring 3-4 minute, tested viscosity 20-22 second, single-side machine degree of sticking with glue is controlled at 14-18 second during production, and Double-plate machine is controlled at 35-80 second; Should prepare virgin rubber adjustment when viscosity is low.

The present invention compared with prior art has the following advantages and positively effect:

1, normal temperature or low temperature adhesion are energy-efficient

Normal temperature of the present invention or low temperature adhesion glue also claim " cold formed " tackiness agent, solidify without heat.Seasoning in solidifying the road has increased toughness, has realized the normal temperature quick-binding.Principal feature is that use temperature is low, usually can carry out under the room temperature condition, if the equipment producer on new can greatly reduce the disposable input of boiler behind use normal temperature or the low temperature adhesion glue, if do not require that operating speed is fast, can not use boiler.In the industry of city type corrugation, for a green channel is got through in energy-conserving and environment-protective.

2, bonding firm, reliable

In the comprehensive cost of corrugated cardboard, the shared ratio of starch adhesive should be minimum, if but not starch adhesive bonding not firm, the yield rate of product will reduce greatly so, causes serious financial loss for carton enterprise.The character of adhesive glue of the present invention is the macromolecule resin aqueous binder, is combined into by macromolecule resin and W-Gum, and initial viscosity is high, and glue consumption is few, and is reliable for effect, and bonding corrugated cardboard is difficult for coming unglued.And it also solved high sized paper, high-density paper a bonding difficult problem (as reason line paper, Nine Dragons paper, U.S. card, Russia's card, U.S. useless, state are useless all can be bonding etc.), compare with traditional amylan, bond strength improves more than 10%, the finished product rate significantly improves, usually all GB be can meet or exceed, production cost and quality cost fundamentally reduced.

3, improve paper board strength

Because adopt normal temperature to play watt principle of typing corrugation, or claim " cold formed ", wear and tear in machines is little, prolong work-ing life, and the equipment amortization cost is low.Use this turbonite side pressure strength can improve more than 10%, carton entire compression intensity significantly improves.The side pressure strength of cardboard improves about 20%.

4, because dry temperature is controlled, and bonding strength is high, uniform drying is smooth, and is good without thermal distortion watt paper shrinking percentage.

5, stable viscosity, anti-circulation

After now a lot of starch adhesives repeatedly recycled for a long time, viscosity degradation was very fast, and effectively Amount of spread descends, and is bonding not firm, degumming phenomenon occurs.And gluing glue of the present invention has been avoided this phenomenon, experiment showed, repeatedly recycle for a long time after, viscosity is almost constant.

6, glue is simple, and is easy to operate.

Traditional starch adhesive is mixed with in the process of glue at rubber powder, usually to do first main body, do again carrier, then main body and carrier just form glue after mixing, and this kind way not only bothers, and has a big risk, in case a certain mistake of walking out of in the operation, even if the process of whole making glue has been wasted, and low temperature adhesion glue only need to directly add water and stirs and get final product, and is simple to operation.

7, greatly improve Working environment

Generally, the temperature of watt line production plant is started lower at production line, noise is little, summer, the greenhouse can reach 45 celsius temperatures, and after using low temperature adhesion glue, because the vapor pressure of boiler has diminished, heat radiation has also reduced, the greenhouse can remain on about 38 degree, has greatly improved workman's Working environment.

8, environmental protection, reduction are polluted

Detect through national wrapped product quality surveillance inspection center, adhesive glue of the present invention has efficiently, the characteristics of environmental protection.Owing to using low temperature adhesion glue, can fuel economy, thus reduce the quantity discharged of carbonic acid gas, sulfurous gas, nitrogen peroxide, reduced greatly environmental pollution.These advantages of product innovation not only can reduce Carbon enterprise a huge sum of money on equipment and drop into, and can also reduce in a large number energy consumption, environmental contamination reduction, finally lower comprehensive production cost, improve the quality of products, and increase the market competitiveness.

9, reduce system synthesis originally

Compared with traditional tackiness agent, it is strong that adhesive glue of the present invention has initial viscosity, and moisture is few, quick-drying, characteristics with low cost.According to measuring and calculating, 0.02/ yuan square metre of every square metre of saving of power consumption; Because paper board strength, planeness, bond strength, smooth finish improve, reveals stupefied, fall watt, the degumming phenomenon minimizing.

Embodiment

A kind of embodiment of corrugated cardboard production line adhesive:

Each component by weight proportioning is:

W-Gum 150-200 part

Solid content caustic soda 2-8 part more than 95%

Potassium permanganate 0-5 part

Borax 2-7 part

Bridging agent 6-10 part

Defoamer 0-3 part

Water 500-1000 part

The starch adhesive that the present invention makes by above-mentioned prescription, technique is simple, need not heat, and makes finished product and only needs 30-60min from being dosed into, and bonding carton fast drying, intensity be high, do not run stupefied, nonhygroscopic, not general tide, the accumulation of salt in the surface soil not.After tested, just sticking 1-1.5min, complete sticking 5-10min, destroy fiber 30-50s, its relevant physical and chemical index all is better than the starch adhesive of flower bulb alkali and present other composition and engineerings making, can be widely used in the export commodities packaging Corrugated Box, used for packing foods Corrugated Box, the Corrugated Box of fruits and vegetables class packaging Corrugated Box and medium and high classes commodity packaging.

Adhesive glue of the present invention and common tackiness agent and flower bulb alkali relatively see Table 1:

Table 1

A kind of preparation method's of corrugated cardboard production line adhesive embodiment:

Each component by weight proportioning is:

W-Gum 150-200 part

Solid content caustic soda 2-8 part more than 95%

Potassium permanganate 0-5 part

Borax 2-7 part

Bridging agent 6-10 part

Defoamer 0-3 part

Water 500-1000 part

The adhesive glue making step is as follows:

According to the prescription requirement, the glue tank injects clear water, opens steam valve and heats, and room temperature is more than 28 degrees centigrade, and water temperature is controlled at 30-32 degree centigrade; Room temperature is at 23-28 degree centigrade, and water temperature is controlled at 35-37 degree centigrade; Room temperature is below 23 degrees centigrade, and water temperature is controlled at 38-43 degree centigrade;

Put glue tank warm water into stirred pot, add alkali for the first time, stirred one minute;

Throw W-Gum, stirred 8-15 minute;

For the second time add alkali, slowly add, stir while adding, use the flow cup tested viscosity;

The single-side machine viscosity controller is in 17-18 second;

Add the every tank 6-10kg of bridging agent, stirred 3-8 minute;

Add borax and stirring 3-4 minute, tested viscosity 20-22 second, single-side machine degree of sticking with glue is controlled at 14-18 second during production, and Double-plate machine is controlled at 35-80 second; Should prepare virgin rubber adjustment when viscosity is low.

Preparation method's specific embodiment is as follows:

Embodiment one: single-side machine adhesive glue preparation method

(1), the glue tank is added 540kg water, post-heating (summer temperature 33 degree, winter 40-42 degree);

(2), water is placed stirred pot, weigh and pour the stirred pot stirring into after 2.2kg caustic soda dilutes with an amount of cold water, add the 160kg W-Gum after 3 minutes, stirring adds secondary caustic soda 2.3kg, dilute with water, adds fashionable usefulness and should use special funnel and slowly add.When viscosity reaches 25 seconds, add the 6kg bridging agent, viscosity degradation is about 8 seconds in the time of 7 minutes, and stir fully rear (minimum stirring 5 minutes) adds the 2.3kg borax.

(3), this moment borax quick Pengization, stir fully even after, viscosity should be about 20 seconds.

Embodiment two: Double-plate machine adhesive glue preparation method

(1), the glue tank is added 800kg water, post-heating, summer temperature 33 degree, winter the 40-42 degree;

(2), water is placed stirred pot, weigh and pour the stirred pot stirring into after 2.5kg caustic soda dilutes with an amount of cold water, add the 150kg W-Gum after 3 minutes, stirred 8-10 minute: add secondary caustic soda 2.5kg, dilute with water, add fashionable usefulness and should use special funnel and slowly adding.Viscosity reached 25 seconds-27 seconds the time, added the 6kg bridging agent, stirred 1-3 minute, rear the addings 2.5kg borax that stirs fully, stirs 1-3 minute extremely complete even.Add again potassium permanganate 1.8kg, then, stirred 5-10 minute.Add again defoamer 0.5kg, stir.

(3), gelatinization point is 58 degree.

Three: two barrels of formula adhesive glues of embodiment preparation method

(1), glue water is filled it up with post-heating, transfer in the stirred pot 32-35 ℃ of winter, get final product to 550kg;

(2), will be in the glue tank inject 250kg water, then heating adds 37.5kg starch and stirred 3 minutes 32-35 ℃ of winter, evenly adds 7-7.5kg caustic soda, stirs about half an hour to get final product to transparent drawing-down is thread;

(3), when the glue tank reacts, the 200kg W-Gum is poured in the stirred pot after glue reaction evenly, slowly add stirred pot, stirred 10 minutes, viscosity reaches 27-30 second, adds the 8kg bridging agent, at this moment viscosity rise, add the 3.5-4kg borax after 5 minutes, be stirred to viscosity and reach 35-70 second;

(4), gelatinization point is 58 ℃.

The application of adhesive glue of the present invention in corrugated paper board production line:

1, changed the production technique of using boiler (oil oven) heat-shaping corrugated cardboard in traditional production line, it designs unique, new technology.The major technique innovative point is: the tackiness agent of low temperature moulding technology and independent development, and drying source is controlled, and bonding strength is high, and uniform drying is smooth, Production Line Configured is reasonable, compact construction, and comprehensive cost is low, without boiler (oil oven) investment, reduce three waste discharge, energy-conservation and environmental protection.

2, complete machine action load is low, and the use machine is little, only with about 30% power of equipment, and therefore can be energy-conservation.Find in test, ribbon sign (conventional production lines paper throw approximately 600-700 myriametre must be changed Corrugator roller) does not also appear changing in (1.6m-1.8m door width of cloth unit total power 40KW motor) low temperature watt line paper throw 1400 myriametres.

Because the normal temperature shaping technology, whole canyon produces at normal temperatures, compares with (tradition machinery) at high temperature running, and mechanical property and wear-resistant wearing out differ twice, prolong work-ing life more than one times.

3, corrugated cardboard intensity is high

[detect as can be known through national wrapped product quality examination center (Qingdao), tackiness agent of the present invention has the efficient feature of environmental protection, and (NO.QTC-61500707, NO.QTC-61500565) is provable for this examining report.Lead in the tackiness agent, cadmium mercury, sexavalent chrome, Polybrominated biphenyl, Poly Brominated Diphenyl Ethers do not detect.] make the pH value of glue be neutrality, therefore, according to detect strength increase 5%-10%. with the product under the grammes per square metre

4, the analysis of production of fluting base paper water evaporation quantity

According to national standard, watt paper, Case Board delivery moisture reaches as high as 12%, and the roll off the production line content of moisture of corrugated cardboard, minimum is 12%, is up to 16%.Hence one can see that, and the evaporation of corrugated board production moisture mainly is the moisture that the oven dry tackiness agent brings.So the size of every square metre of product resin added, the moisture content of tackiness agent, the moisture content of starting material (paper) directly affect the corrugated cardboard moisture that rolls off the production line.Because this project adopts the moisture content of the plastics binder of self-control research and development to only have 50%, facts have proved, if the moisture of Corrugating Base Paper and carton not high (referring to about 12%), when five layer lines of this project are produced three layers of (single watt) corrugated cardboard, air pressure valve oven dry can be do not opened fully, the product moisture requirement that rolls off the production line can be met.If there was dampness in the air, watt paper, Case Board absorb moisture, and water content is greater than 12%, and production process oven dry moisture is difficult for evaporation, and the controllable valve door remains on 3.5 air pressure, just can accelerate the eliminating of body paper moisture.

5, the tackiness agent moisture content is low, quick-drying, and the product moisture steam output is few, and is energy-conservation.The normal temperature of independent research typing tackiness agent, moisture content be at 40%---50%, at room temperature, but quick-drying, the unit product usage quantity is little, so water evaporation quantity is little, therefore, sets in the same situation of other conditions, uses this tackiness agent also to can save energy.

6, the main frame of production line is in greenhouse work, and frictional coefficient is little, and load is much smaller than traditional corrugated paper production line, and main engine power (containing longitudinal and transverse cutting knife, Double-plate machine) is 120KW altogether.Therefore, this part is than conventional production lines energy-conservation 50%.

Because the coefficient of expansion that various paper are inhaled behind the glue is different, therefore, cause that easily paper shrinks the generation warpage, adopt high-temperature shaping technique, paper causes contraction in the heat setting type process, and contraction ratio is about 10%, and the cardboard that the normal temperature shaping technology is produced can increase by 10% to the paper push-and-pull at the paper type-approval process, and corrugation has at utmost guaranteed the planeness of paper owing to not be out of shape by the high temperature barbecue in the type-approval process.Various indexs can also improve annual the pressing of 5%, one line and produce 2,000 ten thousand square metres of calculating, may economize 400 tons of Corrugating Base Papers every year, save 1,000,000 yuan.Can save body paper 3%--5% (seeing Table 2) for every square metre.

Table 2 corrugated cardboard (five layers/three layers) production line the old and new machine production product cost contrast table

7, aspect normal temperature, adopted vacuum suck, the track moulding, but finally or by flute profile force to lead paper, differential has been realized formed at normal temp without powerful paper feeding composite technology technology; On normal temperature is compound, successively tried out roller press type, strap-clamping-type and vacuum negative pressure type, finally realized that with the air cushion malleation normal temperature of cardboard is compound; Aspect glue (being adhesive glue) development, should glue harmless, tasteless, again dry and compound firmly.What of moisture the consumption of glue directly have influence on, and the molecular structure of traditional W-Gum has determined the water content of glue, because be less than 65% moisture, starch can gelatinization, does not produce viscosity, can not be bonding and lacked with glue.In 20 seconds the water regain of paper surpass glue sweat total amount 20% the time, the moisture content in the glue very little, can not with starch pasting, therefore also nature can not be bonding.The moisture of evaporation can affect paper strength after traditional glue that can be bonding, the ratio of water heated in bonding gelatinization process.The glue that only changed could change the complex method of complete machine.For this reason, we have carried out nearly 300 kinds investigation and comparison, have selected at last two kinds of material combination of macromolecule resin and W-Gum to become production line glue, have realized that normal temperature is compound.

8, normal temperature shaping technology

(1) normal temperature plays a watt moulding

General knowledge is told us, and when fiber had certain moisture content, hot briquetting was easier to.Electric iron, spray electric iron are good examples.Watt paper of tradition corrugated board production device rises watt, is to utilize this hot-work principle.Under identical moisture content room temperature state, fiber (paper) under the effect of external force, is changed another shape, also be possible, two problems can appear first, and the one, resilience, for example paper folding, external force is inadequate, and the paper meeting resilience of doubling extends; The 2nd, over-stressed, fiber is impaired.In a word, moulding is undesirable, want paper is folded in half into 30 degree angles, otherwise stressed excessive, be converted into 5 degree, or paper can become 60 degree by bullet.

(2) bonding and tackiness agent

The tackiness agent that uses in traditional corrugated board production process has the inexpensive advantage of cost, but must be heated to more than 90 ℃ could gelatinization bondingly, and certain bond strength can be arranged.In any case this tackiness agent formed at normal temp technology is obsolete.The tackiness agent of selling on the market is various in style, various characteristics, but the corrugated board production usage quantity is large, and cost can not be accepted.So the tackiness agent that the formed at normal temp corrugated board production is used must be researched and developed voluntarily.It should have that initial viscosity is strong, moisture is few, quick-drying, cheap characteristics.Through configuration, selection, the use of several times, we have selected to use under preparation, the greenhouse under the greenhouse, and cheap to have initial viscosity good, and water content is lower, the plastics binder of quick-drying.

Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited to above-mentioned giving an example.Those skilled in the art are in essential scope of the present invention, and the variation of making, remodeling, interpolation or replacement also should belong to protection scope of the present invention.

Claims (1)

1. the preparation method of a corrugated cardboard production line adhesive is characterized in that, Double-plate machine is as follows with the adhesive glue making step:

(1), the glue tank is added 800kg water, post-heating, summer temperature 33 degree, winter the 40-42 degree;

(2), water is placed stirred pot, the 2.5kg caustic soda of solid content more than 95% of weighing is poured stirred pot into after with an amount of cold water dilution and is stirred, and adds the 150kg W-Gum after 3 minutes, stirs 8-10 minute; Add the caustic soda 2.5kg of secondary solid content 95% or more, dilute with water, add and fashionablely should use special funnel and slowly adding, viscosity reached 25 seconds-27 seconds the time, add the 6kg bridging agent, stirred 1-3 minute, the rear adding 2.5kg borax that stirs fully stirs 1-3 minute to fully even; Add again potassium permanganate 1.8kg, then, stirred 5-10 minute; Add again defoamer 0.5kg, stir.

(3), gelatinization point is 58 degree.