Adhesive composition

FIELD: chemistry.

SUBSTANCE: composition contains carrier starch and secondary starch. The carrier starch contains (in terms of dry mass), less than 50% pre- gelatinised starch and has higher sensitivity to alkali than the secondary starch. The secondary starch is selected from a group comprising maize starch, potato starch, wheat starch and a mixture of two or more of the said types of starch. The carrier starch is selected from a group comprising wheat starch, potato starch, cassava starch, barley starch and a mixture of two or more of the said types of starch. The composition contains (in terms of dry mass) 0.5-60% carrier starch, 40-99.5% secondary starch and 1-8% alkali. The composition also contains (in terms of dry mass) 0.1-3.5% boron compound. An adhesive is obtained by adding the composition to water and stirring while adding a sufficient amount of alkali. The adhesive is used to make corrugated cardboard and multilayer materials. The advantage of the adhesive composition lies in that it can be easily prepared with low expenses on time and equipment.

EFFECT: use of the adhesive improves quality of cardboard, reduces adhesive consumption and increases rate of production.

25 cl, 6 tbl, 1 ex

 

The technical field

The present invention relates to adhesive compositions, and more particularly to so-called adhesive compositions one-bag-mix (RBM), and the way they are received.

The level of technology

Adhesives for use in such industries as the paper handling and production of corrugated products, typically classified as either a type adhesives Stein-Hall (Stein Hall), or type Minicar (Minocar).

Adhesives type Stein-Hall produced by dispersing approximately 10-25% of the total starch in the primary fluid (water). This part of the total starch called the "primary starch". The mixture is heated and then add a certain amount of alkali. This leads to a complete initial gelatinization of the starch, resulting in a high viscosity starch paste (known as "media"). Then in the composition include secondary water to lower the temperature and the concentration of alkali in the media. Finally add the secondary starch (approximately 75-90% of total starch), if necessary, together with other compounds, such as borax.

On the contrary, the adhesives of the type Minocar receive with much higher levels of primary starch (approximately 40-60% of total starch). Alkali is added to the media gradually until reaching a certain level of viscosity. Upon reaching this level of viscosity of naujamiestis stop very fast by adding the remaining (secondary) and liquid starch (plus other compounds, if you need to).

Both types of adhesives suffer from the disadvantage that they must prepare the user, thus, requires not only additional resources of time and equipment, but also a certain level of technical knowledge. For this reason we have developed a third type of glue. These adhesives are known as "one-bag-mix" (OBM) adhesives. They provide a single pre-prepared mixture of dry ingredients that can be cooked direct one-step method, just add water.

RBM-adhesives available on the market for over forty years. They typically include along with giving alkali chemicals, also boron compound as the carrier and the secondary starch. Then as a secondary starch is usually a native starch with a relatively high temperature of gelatinization (for example, about 70C. in the case of corn starch), RBM-starches-carriers is usually chosen from a pre-clusterseven (or dried on a cylinder drier") starches. Unfortunately, the use of these starches is very expensive.

Thus, the necessary alternative products that exist in the art. The present invention provides such an alternative.

Brief description of drawings

Figure 1: Sensitivity to alkali spills the different starches at 25C.

Figure 2: the Sensitivity to hydrolysis of various starches at variable temperatures.

Figure 3: determination of the base number for Brabender corn and wheat starch.

Figure 4-5: characteristics of the adhesives obtained in different ways.

6: a Device for determining the point of gelatinization.

The invention

According to the first object of the present invention is provided, the adhesive composition for the production of corrugated cardboard and/or paper-handling options, including a starch carrier, the secondary starch and alkali, characterized in that the starch-carrier:

optionally includes, calculated on dry basis, less than 50% pre-castelsilano starch and

has a higher sensitivity to alkali than the secondary starch.

Preferably the difference in sensitivity between alkali starch carrier and the secondary starch will be at least 0.05% of NaOH, preferably of 0.1% NaOH, more preferably at least 0.15% of NaOH.

According to an additional object of the present invention provides a method of obtaining a glue for the production of corrugated cardboard and/or paper-handling options, including the stage of adding the above-mentioned composition to water and mixing, wherein is added a sufficient amount of alkali to the mixture of clays which can risovat starch carrier, but not secondary starch.

According to another additional object of the present invention provides a method of obtaining adhesive compositions for the production of corrugated cardboard and/or paper-handling options, including the stage of adding starch carrier, the secondary starch and at least lye to water and mixing, characterized in that the starch-carrier:

includes, calculated on dry basis, less than 50% pre-castelsilano starch and

has a higher sensitivity to alkali than the secondary starch;

and the fact that add a sufficient amount of alkali to the mixture to kleysterovali starch carrier, but not the secondary starch.

Preferably before adding the starch and alkali water pre-heated to 20-60C., preferably 30-50C., more preferably up to 35-45C, more preferably up to 40-45C.

Next, the feature adhesive obtained by the above method, and cardboard materials obtained using this glue.

Detailed description of the invention

The present invention provides an adhesive composition comprising starch carrier, the secondary starch and alkali, characterized in that the starch-carrier:

- includes optional, calculated on dry basis, less than 50% pre-castelsilano Brahma the a and

- has a higher sensitivity to alkali than the secondary starch.

Used in the art, the term "adhesive composition" may refer to both dry and aqueous adhesive compositions. Dry compositions (for example, type one-bag-mix) include some or all of the ingredients required for obtaining the aqueous composition by adding water and/or other liquids. Ingredients water compositions can be diluted only partially, or they can be completely diluted and ready for use.

Only for the sake of clarity, and if not specifically stated otherwise, the dry composition should be considered here as "adhesive composition", and the aqueous composition should be considered here simply as "adhesives". Preferably, the adhesive composition of the present invention is an adhesive composition of the type one-bag-mix.

The adhesive composition of the present invention includes, as a minimum, the starch carrier, the secondary starch and alkali. The principal role of starch carrier in the final glue is to create a certain level of viscosity, thereby providing a stable dispersion (or suspension) raw, neclaustridialnah secondary starch. This is traditionally achieved in the case of adhesives RBM-type by using a pre-castelsilano (and followed the Sabbath.) soluble in cold water) starch carrier.

The starch carrier of the present invention, however, includes less than 50% pre-castelsilano starch. Used here, the term "dry weight" refers to the content of the ingredient (in this case pre-castelsilano starch), expressed as percentage of the total dry weight of the composition (in this case, starch carrier), calculated from the commercial base dry weight of the ingredient. Preferably the starch carrier will comprise less than 40%, more preferably less than 30%, more preferably less than 20%, more preferably less than 10%, more preferably less than 5% pre-castelsilano starch. According to a preferred variant implementation of the starch carrier essentially will not include pre-klasterizovannykh starch. Instead, the starch carrier of the present invention differs in its sensitivity to alkali, specifically sensitive to alkali, which is much higher than the sensitivity to alkali secondary starch.

Indeed, it is assumed that at a certain concentration and when mixed with water, the alkali will kleysterovali only more sensitive starch carrier. Secondary starch will not be dwergen its action. Instead, the secondary starch will clusterseven during or after application of the adhesive under the action of heat and/or pressure (for example, in a corrugating machine) in order to obtain a starch paste with a significantly increased viscosity. This increase in viscosity leads to the formation of adhesive joints.

Theoretically, if the above criteria are sensitivity are also consistent with the condition that the starch carrier comprises less than 50% pre-castelsilano starch as a carrier, and a secondary starch can be selected from any native or modified starches or starch derivatives (including, for example, esterified starches with ester bonds, esterified starches with simple ether linkages, thinned starches). According to a preferred variant implementation of the starch carrier will be karboksimetilirovaniya starch.

The starch carrier and the secondary starch will preferably be selected so that the difference in sensitivity to alkali between the two was at least 0.05% of NaOH, preferably of 0.1% NaOH, more preferably at least 0.15% of NaOH (where sensitivity to alkali measured according to the Method 1, as described below). Thus, for example, if corn starch is selected as the secondary is on starch, the starch carrier may be any one or more of starches from wheat starch, potato starch, tapioca starch and barley starch. It must, however, be noted that there are corn starches with widely differing sensitivity to alkali. Therefore, it is possible that as the carrier and the secondary starch would be produced from corn (or from any other source, which produces starches with widely differing sensitivity to alkali, such as tapioca or potato). However, if the secondary starch selected corn starch, starch carrier will preferably be wheat starch.

Only for the purpose of illustration in the following table (taken in a simplified form of the work Kofler. Starch: Chemistry and Technology, second edition 1984, str, table III) given a standard temperature of gelatinization of a number of widely available starches.

The type of starchThe temperature of gelatinization (C)
Corn62-72
Sorghum68-78
Wheat5-64
Tapioca - Brazilian49-64,5
Tapioca - Dominican58,5-70
Tapioca - Siamese62-73
Potato50-68
Waxy maizePp.63-72
Waxy sorghum67,5-74
Barley51,5 is 59.5
Rye57-70
Pea (green vegetable peas)57-70
Rice68-78
Corn with high amylase content67 - * (full gelatinization is not achieved in boiling water)

The same difference is shifted to lower values can be observed when starch suspended in water under alkaline conditions. For the purposes of the present invention, however, will use method 1 (as defined below) to determine differences in sensitivity to alkali.

Examples of some preferred combined the Nations starch - media/secondary starch include:

Starch-mediaSecondary starch
Native wheat starchNative corn starch
Native potato starchNative corn starch
Native potato starchNative wheat starch
CMS* potato starchNative wheat starch
CMS* potato starchNative potato starch
Native potato + native wheat starchNative corn starch
CMS* potato + native wheat starchNative corn starch
* CMS = karboksimetilirovaniya starch

The exact composition of the final adhesive will, of course, depend on the inherent desirable characteristics (such as the total solids content), the intended end use and include, for example, with teticheskikh binder, hydrocolloids, thickeners and other chemical additives. However, the preferred composition will include, based on dry weight, 0.5 to 60%, preferably 5-40%, more preferably 5-25%, more preferably 5-15% starch carrier and 40-99,5%, preferably 75-95%, more preferably 80-90% of the secondary starch.

The adhesive composition will also include alkali. The alkali may be selected from one or more alkali of sodium carbonate, calcium hydroxide, sodium hydroxide and other suitable alkaline compounds, known to specialists in this field of technology. According to a preferred variant implementation of the present invention, the adhesive composition will comprise sodium carbonate and calcium hydroxide, which when added to the water react with the formation of caustic soda (by the formula PA2CO3+CA(Oh)2=2NaOH+caso3). Preferably the composition will include alkali in amounts, calculated on dry weight, 1 to 8%, more preferably in the amount of 3-6%.

The composition may also include boric compound. Boron compounds are used as regulators of rheological properties and the bonding accelerators and can be selected from one or more compounds from decahydrate borax, boric acid, borate and boric other compounds known to the expert. According to PR is doctitle variant implementation of the present invention the boron compound will be decahydrate borax. Preferably the composition will include boric compounds in amounts, calculated on dry weight of 0.1 to 3.5%, more preferably from 0.5 to 2.5%, more preferably 1,2-1,7%.

Thus, according to a preferred variant implementation, the adhesive composition of the present invention will include a starch carrier, the secondary starch, alkali and boric connection and differ in that the starch carrier comprises less than 50% pre-castelsilano starch and has a higher sensitivity to alkali than the secondary starch. After adding this composition to a single portion of water lye will attack the starch carrier, causing it to swell. On the contrary, at this stage, with lower sensitivity to alkali secondary starch to swell will not.

Accordingly, the present invention further provides a method of obtaining a glue involving the stage of adding the main composition defined above, to water and mixing, characterized in that added a sufficient amount of alkali to the mixture to kleysterovali starch carrier, but not the secondary starch.

The invention further provides a method of obtaining a glue involving the stages of adding starch carrier, the secondary starch and at least lye to water and mixing, characterized in that the starch-media/p>

includes, calculated on dry basis, less than 50% pre-castelsilano starch and

has a higher sensitivity to alkali than the secondary starch;

and that added a sufficient amount of alkali to the mixture to kleysterovali starch carrier, but not the secondary starch.

Preferably the ratio of water to other ingredients will be determined so that the total weight of solids in the final adhesive was 15-40% by weight, preferably 20-35% by weight, more preferably 20-30% by weight.

Gelatinization of any given starch in the presence of alkali depends on a number of factors, especially water temperature and alkali concentration. These factors should be determined, inter alia, in accordance with the type of starch carrier and the secondary starch used in the method of the invention, whereas the temperature of gelatinization of the final adhesive. Thus, for example, the higher the required point of gelatinization of the glue, the smaller amount of alkali will be required and the greater the temperature should be a single portion of water.

Preferably the water will be preheated up to 20-60C., more preferably 30-50C., more preferably up to 35-45C, more preferably up to 40-45C; the number and type of alkali to be used, will be b the h labor is determined by the specialist, but preferably the amount will be from 1 to 8%, more preferably from 3 to 6%, based on dry weight. Examples of alkaline compounds which can be used, defined above.

In addition to accounting for the above factors before using glue starch-media, you must give enough time for the swelling. Water, starch carrier, the secondary starch, alkali and other optional ingredients, therefore, preferably should be subjected to mixing for at least 10 minutes, more preferably for 10 minutes to 1 hour, more preferably within 20-40 minutes, more preferably within about 30 minutes. According to one variant of implementation of the starch carrier and the secondary starch can be mixed with water before adding alkali, boron compounds and/or other optional ingredients.

Thus obtained liquid composition is ready for use. Thus, the present invention further provides an adhesive obtained by the above method. Such adhesives can be used in any number of applications, including, for example, the production of corrugated products and processing paper. The invention therefore also provides products made with the use of the above adhesive. These products (about what a rule referred to as "cardboard materials") include, for example, corrugated and multiwall paper materials.

The adhesive according to the proposed invention can be used for the production of corrugated and/or pasteboard materials using any of the methods known in the art. In particular, the adhesive is applied at least on one surface of the first sheet, which is then brought in contact with the second sheet, to make the bond. Optionally, adhesive may be applied to both surfaces of the first sheet, which is then placed between the second and third sheets. Preferably, the first sheet will be the middle layer of corrugated cardboard, and glue will be applied only to the top of the corrugation. In this embodiment, the second (and optional third) sheets will be essentially flat outer sheets.

Advantages of the invention

The adhesive compositions of the present invention has several advantages. In particular, they are easy to obtain (in comparison with typical adhesives types Stein-Hall or Minicar) with less time, equipment, and requires less technical knowledge. They can be delivered as one-bag-mix, but not based on the use of chemically modified pre castelsilano starch carrier. Consequently, they have more than the cheap, safer and more environmentally friendly during production and use. In fact, the starch carrier of the present invention may be a native starch, which, in essence, is generated in situ during the process of mixing. They have good adhesive functionality and desirable rheological properties (such as the relatively short structure, stable viscosity, good performance properties and thixotropic behavior). In this they are comparable with traditional adhesives type Minocar. Testing the applicability on an industrial scale also showed that the use of this glue leads to better quality cardboard (for example, smoothness of the plates, less twisting and so on), reduced glue consumption and improved production speed.

Method 1: a Method of determining the sensitivity to hydrolysis of starches

1. To prepare the first batch of 500 g suspension with a solids content of 10% (based on dry weight) by adding 50 g of starch in a glass beaker, 600 ml, containing 450 g of distilled water. The solution must be constantly stirred using a magnetic maslinica and kept at 25C (1C);

2. To determine the viscosity by Stein-Hall (SH) mist (it should be close to water viscosity, that is, 15-16 sec);

3. To prepare a solution of NaOH containing solid component is 20% (calculated on dry weight);

4. To calculate the amount of NaOH solution required to

add the exact dose 0,375% NaOH (dry matter) mass/weight to 500 g of mist;

5. Add the calculated amount of NaOH to the mist slowly, but immediately. Continue mixing just within 10 minutes.

6. To determine S-viscosity alkaline suspension. Discard this first portion;

7. Repeat steps 1 through 6 with the second portion, but to increase the concentration of NaOH in step 4 to 0.4% (dry matter) mass/mass;

8. To continue the operation (that is, increasing the concentration of NaOH) to obtain very high viscosity;

9. To build a graph of viscosity against concentration of alkali and to determine the starting point of the gelatinization of starch.

A number of commonly used starches were tested by this method. The results are shown in chart 1. As you can see from this chart, potato starch and wheat starch require much less alkali (0,45% in weight ratio) to the beginning of gelatinization than corn starch (0,58% mass/mass). In other words, as potato and wheat starch have a higher sensitivity to alkali than corn starch.

Since the temperature also affects the gelatinization can be further analysis, as shown in figure 2. This diagram illustrates the behavior razlichnykh as depending on the alkali concentration, and on temperature. It allows you to accurately assess for each type of starch and at a certain concentration of alkali temperature of gelatinization (i.e. the temperature at which it starts swelling). The diagram was obtained by repetition of the method described above (figure 1) at different temperatures and by plotting for each concentration of alkali exact temperature at which it was first marked increase in viscosity. Then the difference in sensitivity between the two types of starch can be determined by comparison at any given temperature with different concentrations of alkali necessary to initiate gelatinization.

Thus, it is possible to see that, for example, at 38C wheat starch requires 0,355% solids NaOH) in a weight ratio to the beginning of gelatinization, while corn starch (AB 5,8 min) requires 0,49% solids NaOH) in a weight ratio of: wheat starch has a higher sensitivity to alkali than corn starch. The difference in sensitivity to alkalis between these two types of starch is about is 0.135% solids NaOH in terms of weight.

Method 2: the Alkaline method of determining the sensitivity to hydrolysis of starch by Brabender

An alternative description of the sensitivity of the starches to alkali used in industry corrugation is skilled products is the base number of Brabender (AB). The number of AV any given starch represents the time required by this starch to achieve 100 units of Brabender (BU) under certain strictly defined conditions:

1. To run and calibrate the viscometer (Brabender) Viscograph E according to the technical instructions issued by the manufacturer. You must specify the following parameters: torque measurement (250 cmg-force), the speed of the recorder (1 cm/min), speed (75 rpm), initial temperature (17C)nominal temperature (50C), the heating rate of 1.5C/min), speed drawing (1 cm/min). You should use the cartridge 350 cmg-force.

2. To place a low glass beaker, 600 ml laboratory scale and reset the scale.

3. Weigh out a sample of starch close to 0.01 g using the following formula:

CornWheatPotato
m=(2588)/d.s.m=(2588)/d.s.m=(2582)/d.s.

where m represents the mass of the sample of starch, expressed in g, and d.s. is dry substance of the starch, expressed in weight percent.

4. Add a glass of exactly (445 - m) g of demineralised water cooled (4 on the 10C). Place the beaker on the magnetic stirrer, to enter the witness device and suspended starch.

5. While mixed starch, fill the burette 100 ml of chilled caustic soda (1.0 M sodium hydroxide - Merck No. 109137).

6. When the obtained homogeneous suspension at a temperature from 14C to 16C add (approximately 90 seconds) from the burette 50 ml of chilled caustic soda.

7. Pour the suspension into the Cup of the viscometer of Brabender (which chilled 4-15C in the refrigerator or water bath) and insert the measuring head and the sensor.

8. To run the program Brabender according to the technical instructions. At this stage the temperature of the suspension should be less than 17C.

9. When the temperature reached 20C, start the stopwatch and record the time (in minutes)spent on the achievement of 100 BU.

According to this method may be determined by the difference between the sensitivity to hydrolysis of corn and wheat starch, as shown in figure 3. From this graph it is clear that the number of AB corn starch (20,8) is more than twice larger number of wheat starch (9,9), and that corn starch is thus much less sensitive to hydrolysis than wheat starch.

In the present invention, the difference in sensitivity between alkali starch carrier and the secondary starch can batterijen as follows:

(AB secondary starch) - (number of AV starch-media)

The difference between these two values should be equal to at least 5 min, preferably at least 8 minutes

Method 3: the gelatinization Temperature adhesives

1. Using the device shown in figure 5, to fill the outer glass chamber (1) with deionized water to the upper blue chalk line inner glass chamber (2).

2. Place the magnetic Mielnik (6) in the inner glass chamber (2), then fill it (to the lower blue chalk line) subject to the test of cardboard with glue.

3. To assemble the device, as shown in Fig.6, where (3) represents the glass lid; (4) represents thermoelectric indicator length 145 mm, fixed in a glass tube so that its end is approximately 25-30 mm from the bottom of the inner glass vessel; and (5) represents the indicator for measuring temperature and place it on a heating plate with a clearly defined temperature of 250C.

4. To enable the indicator (5). Within the first few minutes the temperature will drop by about 2-3C of cold water in the glass chamber. After a few minutes the temperature will continuously rise to the temperature of gelatinization (or "point of gelatinization"). Once it reaches the point of clusterize the AI, the temperature increase will cease and it will weakly decrease approximately by 0.1-0.5C (at the same time with this magnetic Mielnik will cease to rotate due to a sharp increase in viscosity). The highest temperature reached to this decrease corresponds to the point of gelatinization of the glue. Examples

Conducted a series of tests to compare the performance of the standard RBM-glue (test 1), glue SH-type (test 2) and some of the adhesives of the present invention (test 3-12). Details of each of these tests are given in tables 1 and 2.

All adhesives were obtained using 1050g single portion of water and while stirring at 930 1/min during the initial 30 minutes Glue SH-test type 2 was obtained using 404,4 g of the raw water and 629,17 g secondary water. The temperature of the single portion of water was set to 40C for all tests except Test 1, where she was set to 25-30C.

After the initial 30 minute preparation period was measured viscosity by Stein-Hall (SHV), the viscosity Brookfield (BV) and the gelatinization temperature (GT). The viscosity Stein-Hall and Brookfield was measured at 30C. the Viscosity Stein-Hall was measured using a Cup of Stein-Hall and by the standard method. The viscosity Brookfield also measured according to standard methods, using spindle 3 at 100ob/min The temperature of gelatinization of the adhesive was measured using method 3 as described above. Then these measurements were repeated after stirring over night. The results are shown in tables 3 and 4 and shown on figure 4 and 5.

Table 3
123456
After receivingSHV (s)696270795954
BV (mPas)444300620680256355
GT (C)53,657,356,556,355,656
After stirring over night SHV (s)595052765948
BV (mPas)322220475434256249
GT (C)55,55858,557,25756

Table 4
789101112
After receivingSHV (s)543241483088
BV (mPas)348158 279285153580
GT (C)50,949,850,149,551,848,8
After stirring over nightSHV (s)503534405955
BV (mPas)332220240283256474
GT (C)53,853,252,953,054,153,4

From these results we can see that the adhesives obtained by the present invention have properties that are at least comparable with traditional adhesives RBM and Stein-Hall.

Table 1
no trial123456
The solid content25%=350 g25%=350 g25%=350 g25%=350 g25,2%=353,4 g25%=400 g
Native starch or starch-media-C*Gum 03431Native wheat starch RT 20002Native wheat starch RT 20002Native potato starch 300882Tapioca starch Amilogill 500
%-1212121012
g-40,44 40,4438,7632,644,4
C*Gum 03627and350 g-----
Secondary starch: C*Gum 03431b-296,54 g296,54 g284,25 g293,8 g325
Lye-NaOH solution (33% solids)NaOH solution (33% solids)PA2CO3CA(Oh)2PA2CO3Ca(OH)2PA2CO3Ca(OH)2
g-RUB 24.55RUB 24.55139,1 139,114,810,4
% dry matter content in the full RBM-0,580,583,712,63,692,63,702,6
Decahydrate borax (g)-a 4.9a 4.9a 4.9a 4.9a 4.9
% dry matter content in the full RBM-1,41,41,391,35
and*Gum 03627 is an adhesive one-bag mix, available from Cargill
bG*Gum 03431 is a native corn starch, available from Cargill

Ca(OH)2
Table 2
no trial789101112
The solid content20%=280 g25%=350 g25%=350 g30%=420 g30%=420 g30%=420 g
Native starch or starch-mediaNative potato starch RT 30082Native potato starch RT 30082Native potato starch RT 30082Native potato starch RT 30082Native potato starch RT 30082Native potato starch RT 30082
%1914 15171212
g554952605050
C*Gum 03627and350 g-----
Secondary starch: C*Gum 20004c205 g281 g277 g270 g350 g350 g
LyePA2CO3Ca(OH)2PA2CO3Ca(OH)2PA2CO3PA2CO3Ca(OH)2PA2CO3Ca(OH)2PA2CO3Ca(OH)2
g969,56,59,56,596,59,56,710,57,5
% dry matter content in the full RBM0,80,450,70,450,70,450,80,60,650,450,750,5
Decahydrate borax (g)2,8-3,53,53,5 4,24,2
% dry matter content in the full RBM111111
aC*Gum 20004 is an adhesive one-bag mix, available from Cargill

1. The adhesive composition for the production of corrugated cardboard and/or paper-handling options, including a starch carrier, the secondary starch and alkali, characterized in that the starch carrier and the secondary starch is selected so that the starch carrier had a higher sensitivity to alkali, calculated according to Method 1, opened on S.11-12 description than the secondary starch.

2. The adhesive composition according to claim 1, characterized in that the difference in sensitivity to alkali, calculated according to Method 1, between starch carrier and the secondary starch is at least 0.05% of NaOH, preferably at least 0.1% of NaOH, more preferably at least 0.15% of NaOH.

3. The adhesive composition according to claim 1 or 2, characterized in that the starch carrier includes calculated on a dry mass of less than 50%, preferably less than 0%, more preferably less than 30%, more preferably less than 20%, more preferably less than 10%, more preferably less than 5%, pre-castelsilano starch.

4. The adhesive composition according to claim 1, characterized in that the starch carrier does not include any pre-castelsilano starch.

5. The adhesive composition according to claim 1, characterized in that the secondary starch selected from the group consisting of corn starch, potato starch, wheat starch, and mixtures of two or more of them.

6. The adhesive composition according to claim 1, characterized in that the starch carrier selected from the group consisting of wheat starch, potato starch, tapioca starch, barley starch and mixtures of two or more of them.

7. The adhesive composition according to claim 1, characterized in that the starch carrier is karboksimetilirovaniya starch.

8. The adhesive composition according to claim 1, characterized in that it includes in the calculation of the dry weight of 0.5-60%, preferably 5-40%, more preferably 5-25%, more preferably 5-15% starch carrier.

9. The adhesive composition according to claim 1, characterized in that it includes in the calculation of the dry weight 40-99,5%, preferably 75-95%, more preferably 80-90% of the secondary starch.

10. The adhesive composition according to claim 1, wherein the alkali is selected from carbonate soda which I calcium hydroxide, sodium hydroxide or mixtures of two or more of them.

11. The adhesive composition according to claim 1, characterized in that it includes in the calculation of the dry weight of 1-8%, preferably 3-6% alkali.

12. The adhesive composition according to claim 1, characterized in that it further includes a boron compound, preferably decahydrate borax.

13. The adhesive composition according to item 12, characterized in that it includes in the calculation of the dry weight of 0.1 to 3.5%, preferably 1.5 to 2.5%, more preferably 1,2-1,7% boric connection.

14. The method of obtaining the adhesive for the production of corrugated cardboard and/or paper-handling options, including the stage of adding the composition according to any one of claims 1 to 13 to the water and mixing, characterized in that added a sufficient amount of alkali to the mixture to kleysterovali starch carrier, but not the secondary starch during mixing.

15. The method of obtaining the adhesive for the production of corrugated cardboard and/or paper-handling options, including the stage of adding starch carrier, the secondary starch and at least lye to water and mixing, characterized in that the starch carrier and the secondary starch is chosen so that the starch carrier had a higher sensitivity to alkali, calculated according to Method 1, opened on S.11-12 description than the secondary starch, while adding a sufficient amount is in alkali, while mixing to kleysterovali starch carrier, but not the secondary starch, and starch-media includes calculated on a dry mass of less than 50% pre-castelsilano starch.

16. The method according to item 15, wherein the starch carrier and the secondary starch pre-mixed.

17. The method according to item 15 or 16, characterized in that the alkali is selected from sodium carbonate, calcium hydroxide, sodium hydroxide or mixtures of two or more of them.

18. The method according to item 15, characterized in that, based on the dry weight add 1-8%, preferably 3-6% alkali.

19. The method according to item 15, characterized in that it further comprises a boron compound, preferably of decahydrate borax.

20. The method according to claim 19, characterized in that in the calculation of the dry weight add 0.1 to 3.5%, preferably 1.5 to 2.5%, more preferably 1,2-1,7% boric connection.

21. The method according to item 15, wherein the starch carrier and the secondary starch is mixed with water before adding the alkali and/or boron compounds.

22. The method according to item 15, wherein the water is heated to 20-60C., preferably 30-50C., more preferably 35-45C., more preferably 40-45C.

23. The method according to item 15, wherein the starch carrier, the secondary starch, alkali and water are mixed for 10 min to 1 h, preferably for 20 to 40 minutes, more preferably for about 30 minutes

24. Adhesive for corrugated cardboard and/or paper processing, obtained by the method according to any of PP-23.

25. Corrugated cardboard and/or multi-layer materials, obtained by applying the adhesive to the point 24.



 

Same patents:

FIELD: textile, paper.

SUBSTANCE: item is arranged in the form of rectangular sheet, has the first parallel edges in the first direction and the second edges in the second direction, perpendicular to the first direction. Item comprises at least two layers attached together by binder applied in the form of fixing pattern between layers. Fixing pattern is the pattern of fixing of increased size and comprises fixing elements arranged along the first group of irregular wave-like lines of fixing, passing from one parallel edge to the other at the first angle, making from 20 to 70, to the first direction, and along the second group of irregular wave-like fixing lines passing from one parallel edge to the other at the second angle, making from 110 to 160, in the first direction. The first and second groups of irregular wave-like fixing lines cross to form a grid. Fixed area of surface makes from 0.6% to 6.0% of item area.

EFFECT: improved softness, elasticity of absorbing capacity, volume of item.

13 cl, 8 dwg

Wear-proof coating // 2407840

FIELD: chemistry.

SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.

EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.

16 cl, 2 dwg, 6 tbl

Wear-proof coating // 2407840

FIELD: chemistry.

SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.

EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.

16 cl, 2 dwg, 6 tbl

Wear-proof coating // 2407840

FIELD: chemistry.

SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.

EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.

16 cl, 2 dwg, 6 tbl

Wear-proof coating // 2407840

FIELD: chemistry.

SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.

EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.

16 cl, 2 dwg, 6 tbl

FIELD: textile, paper.

SUBSTANCE: method represents reduction of transition metals content in a milled mass to a level unfavorable for sporulation. Preferably, bacterial cells present in the milling system of cardboard or paper machine in fact are not destroyed in the process of technological operations used to reduce the content of transition metals. The method also refers to obtaining packing board or packing paper characterised with a low content of bacterial spores, when to obtain packing board or packing paper a milled mass is used in which the content of transition metals is reduced to a level unfavorable for sporulation.

EFFECT: reduction of bacterial spores in the milling system of a cardboard machine.

20 cl, 9 dwg, 7 ex

FIELD: chemistry.

SUBSTANCE: substrate has a paper base containing cellulose fibre from deciduous wood with particle size smaller than 200 mcm after grinding in amount of not more than 45 wt % and average fibre length between 0.4 and 0.8 mm and filler in amount of 5-40 wt %, particularly 10-25 wt % in terms of the weight of cellulose.The substrate at least contains one polymer layer lying at least on one side of the paper base. There is a layer with a binding agent between the polymer layer and the paper base. The binding agent is a hydrophilic film-forming polymer made from hydroxypropylated starch and/or thermally modified starch. This layer may contain a pigment in form of calcium carbonate, kaolin, talc, titanium dioxide and/or barium sulphate.

EFFECT: reduced limpness and obtaining pure-bred production wastes.

27 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: substrate has a paper base containing cellulose fibre from deciduous wood with particle size smaller than 200 mcm after grinding in amount of not more than 45 wt % and average fibre length between 0.4 and 0.8 mm and filler in amount of 5-40 wt %, particularly 10-25 wt % in terms of the weight of cellulose.The substrate at least contains one polymer layer lying at least on one side of the paper base. There is a layer with a binding agent between the polymer layer and the paper base. The binding agent is a hydrophilic film-forming polymer made from hydroxypropylated starch and/or thermally modified starch. This layer may contain a pigment in form of calcium carbonate, kaolin, talc, titanium dioxide and/or barium sulphate.

EFFECT: reduced limpness and obtaining pure-bred production wastes.

27 cl, 3 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of flooring boards with decorative surface and high wear resistance coats. Proposed method comprises the following jobs: a) making board (1) with decorative surface consisting of wood material; b) applying thermoset base layer (2); c) applying wear-resistant particles (3) of aluminium oxide and/or emery on damp base layer; d) applying cover layer (8) on wear-resistant particles (3) and still damp base layer; e) curing of both said layers (2, 8). Aforesaid layers are acrylate coats based on polyurethane or aliphatic polyester.

EFFECT: higher wear resistance.

17 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of flooring boards with decorative surface and high wear resistance coats. Proposed method comprises the following jobs: a) making board (1) with decorative surface consisting of wood material; b) applying thermoset base layer (2); c) applying wear-resistant particles (3) of aluminium oxide and/or emery on damp base layer; d) applying cover layer (8) on wear-resistant particles (3) and still damp base layer; e) curing of both said layers (2, 8). Aforesaid layers are acrylate coats based on polyurethane or aliphatic polyester.

EFFECT: higher wear resistance.

17 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to paper industry, particularly to wallpaper with layer of adhesive substance on opposite side. Described is wallpaper with layer of adhesive substance, which contains: A) cellulose ether, converted in form of slow action (retard-form); B) pH-regulator for alkaline area over 8; C) capable for swelling, water-insoluble in polymer with milting degree from 5 to 2. Also described is method of wallpaper manufacturing.

EFFECT: obtaining wallpaper, ensuring good ability for movement during smoothing.

14 cl, 2 dwg, 4 ex

FIELD: mixture for introducing in liquid aqueous system.

SUBSTANCE: claimed mixture contains at least one ultradispersed active component for followed dissolution and dispersion in liquid aqueous system. Additionally mixture contains cellulose-containing plant fibers in amount of 2-18 wt.%. Said fibers are preliminary physically or chemically treated with thermomechanical treatment method, chemothermomechanical treatment method, or cellulose extraction method under low pressure. Abovementioned fibers have average length of 20-350 mum, and mixture is in fine-grained form with size from 0.5 mm to several mm. Method for introducing of mixture, containing at least one ultradispersed active component in liquid aqueous system includes blending of active components with abovementioned cellulose-containing plant fibers and introducing thereof into liquid aqueous system.

EFFECT: improve method for manipulation, dosage and introducing of ultradispersed active components, prevention of material agglomeration or consolidation during continued storage.

11 cl, 1 ex, 1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to paper industry, particularly to wallpaper with layer of adhesive substance on opposite side. Described is wallpaper with layer of adhesive substance, which contains: A) cellulose ether, converted in form of slow action (retard-form); B) pH-regulator for alkaline area over 8; C) capable for swelling, water-insoluble in polymer with milting degree from 5 to 2. Also described is method of wallpaper manufacturing.

EFFECT: obtaining wallpaper, ensuring good ability for movement during smoothing.

14 cl, 2 dwg, 4 ex

FIELD: glue materials.

SUBSTANCE: invention relates to a method for preparing glue Stein hall with the high content of dry matter by using a single mixing capacity and comprising the following steps: 1) preparing a carrier by gluing the first part of starch in medium containing part of alkali necessary for preparing the glue; 2) diluting a carrier with water followed by addition of at least lesser part of the second part of starch; 3) addition of remaining part of the second part of starch and remaining part of alkali in diluted form that is necessary for preparing the glue. Addition of remaining the second part of starch and alkali is carried out in stages. Invention provides preparing the glue with the high content of dry and simplifying technology for its preparing.

EFFECT: improved preparing method.

10 cl, 2 ex

FIELD: production of the glue composition of labeling assignment.

SUBSTANCE: the invention is pertaining to production of the glue composition of labeling, in particular, to the glue composition designated for sticking of the glue impregnated-paper labels to the glass, plastic, metallic, ceramic and wood surfaces. The invention allows to produce the glue compositions, which are distinguished by the increased frost-resistance: withstanding the multiple freezing and defreezing. The composition is produced by combination of two compounds preliminary heat-treated at the temperature of 80-90°C and their subsequent heat treatment together with the modifying agent - Amylum at 90-95°C, and bring up to pH=7.0-7.5 IN by KOH or NaOH solution. At that the composition 1 contains: dextrin, gum-arabic pretreated at 130°C and under the residual pressure of 05 mmHg, water; the composition 2 contains: colophony, glycerin, borax, water. At that the first composition was thermotreated in presence of several drips of antifoaming liquid. The labels gain positive stability against a shearing within 10 seconds and after 5 minutes can be torn-off only with a break of the paper.

EFFECT: the invention ensures, that the labels gain positive stability against a shearing within 10 seconds and after 5 minutes can be torn-off only with a break of the paper.

1 tbl, 8 ex

FIELD: adhesive composition, in particular adhesive paste for wallpaper.

SUBSTANCE: claimed composition contains flavoring agent releasing adhesive, component comprising of at least one flavoring agent, and at least one carrier. Composition is in dry form such as powder or granules and can be mixed with water. Moreover in odor-releasing component at least one flavoring agent is bond to carrier in such a manner that said flavoring agent in released from composition only after component contact with water. As carrier preferably cyclodextrin or derivatives thereof are used.

EFFECT: composition free from displeasing odor after blending with water.

7 cl, 1 ex

The invention relates to the production of adhesive materials used in the printing industry for bookbinding works, in particular in the process of mechanized production of binding caps on high-speed equipment

The invention relates to the pulp and paper industry and can be used for the preparation of adhesives in the manufacture of cardboard and corrugated Board

The invention relates to the field of dry powdered adhesives that can be used in household and construction for wallpapering on paper and fabric bases, and also for gluing paper Wallpaper on concrete, plaster, wood and other non-metallic surfaces
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