A water-soluble degradable feces collection bag and preparation method thereof

Abstract

The invention discloses a water-soluble degradable feces collection bag and a preparation method thereof. The feces collection bag comprises, by weight, 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of a plasticizer, 0.5-1 parts of a stabilizer RCPFs, and 1-2 parts of betanin, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate. The preparation method of the feces collection bag comprises three steps of preparing the stabilizer RCPFs, preparing a water-soluble degradable film and preparing the feces collection bag. The feces collection bag prepared by the method has strong water solubility, fast dissolution speed, does not need to be soaked, and is degradable.

Description

Technical Field

[0001] The invention relates to the field of cleaning products, and in particular to a water-soluble and degradable feces collection bag and a preparation method thereof. Background Art

[0002] Pets are good friends of human beings. More and more pets are appearing in communities and outdoors. At the same time, the problem of pet excrement disposal arises. Placing pet excrement in trash cans will produce odor and make it inconvenient for sanitation workers to collect and dispose of the garbage.

[0003] More and more young people choose to put the poop bags directly into the toilet. The main component of traditional water-soluble poop bags is polyvinyl alcohol, which needs to be soaked in water for a period of time before it can be dissolved. During this period of time, it is easy to emit odor, causing unpleasant odor in the house. If you are in a hurry to flush it, flushing it directly without fully dissolving the poop bags will cause blockage in the pipes.

[0004] This patent application is a further development and research based on the traditional poop collection bag, hoping that the developed poop collection bag can increase the interfacial hydrophilicity of the bag, reduce surface tension, increase the dissolution rate, and accelerate its dissolution process. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a water-soluble and degradable poop bag to solve the problem of pet excrement disposal. The raw materials of the poop bag are highly water-soluble, dissolve quickly, do not require soaking, are degradable, will not cause odor in the house, will not cause pipe blockage, and will not cause harm to water bodies.

[0006] In order to solve the above-mentioned first technical problem, the technical solution of the present invention is: a water-soluble biodegradable poop bag, which comprises 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, 1-2 parts of betanin,

[0007] The stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0008] Preferably, the feces collection bag comprises 85-90 parts of polyvinyl alcohol, 10-13 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine in parts by mass.

[0009] Preferably, the starch is one or more of water chestnut starch, corn starch and tapioca starch.

[0010] Preferably, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine.

[0011] Preferably, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate during the preparation of the stabilizer RCPFs is 1:2:1:1.

[0012] Preferably, the plasticizer includes one of glycerol, epoxidized soybean oil, epoxidized rapeseed oil, citrate, etc.

[0013] After adopting the above-mentioned first technical scheme, the effect of the present invention is: due to a water-soluble and degradable poop-collecting bag, the poop-collecting bag includes 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 part of stabilizer RCPFs, and 1-2 parts of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate, and the present patent application adds polyvinyl alcohol, which is a highly water-soluble filling component. At the same time, adding stabilizer RCPFs and sodium alginate can increase the interfacial hydrophilicity of the polymer material, reduce the surface tension, increase the dissolution rate, and accelerate the dissolution process. Betanin can increase the coloration and water solubility of the film, and sodium alginate can further increase the film-forming property and water solubility of the formula. Therefore, the poop-collecting bag has strong water solubility, fast dissolution rate, no need for soaking, is degradable, has strong practicality, and has good environmental protection performance.

[0014] In addition, the feces collection bag includes 85-90 parts of polyvinyl alcohol, 10-13 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine in terms of mass proportions. The feces collection bag made with this proportion of the components has better water solubility.

[0015] In addition, since the starch is one or more of water chestnut starch, corn starch and tapioca starch, especially water chestnut starch, the water solubility of the formula can be further increased.

[0016] In order to solve the above second technical problem, the technical solution of the present invention is: a method for preparing a water-soluble and degradable feces collection bag:

[0017] 1) Preparation of stabilizer RCPFs: Propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone respectively, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator lauroyl peroxide was added, and the concentration was 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer;

[0018] 2) Weigh 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine according to mass fractions, and obtain a water-soluble degradable film by a drum method at a processing temperature of 138-142° C.;

[0019] 3) The bag making machine is used for heat sealing and cold cutting to prepare the poop collection bag, the heat sealing temperature is 80-90°C, and the cold cutting is performed at room temperature.

[0020] After adopting the above-mentioned second technical scheme, the effect of the present invention is: a method for preparing a water-soluble and degradable feces collection bag, which has three steps, a simple process and is easy to operate. The feces collection bag prepared by the method has good water solubility. When dealing with pet excrement, the excrement is packed in a bag and thrown into the toilet. It can be dissolved without long-term soaking, which can effectively prevent the generation of odor and blockage of pipes. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below through specific examples.

[0022] A water-soluble and degradable feces collection bag comprises, by weight, 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of a plasticizer, 0.5-1 part of a stabilizer RCPFs, and 1-2 parts of betanin, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate, wherein the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate during the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is one or more of water chestnut starch, corn starch, and cassava starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer comprises one of glycerol, epoxidized soybean oil, epoxidized rapeseed oil, citrate, and the like.

[0023] The preparation method of the water-soluble and degradable feces collection bag is as follows:

[0024] 1) Preparation of stabilizer RCPFs: Propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate are dissolved in acetone respectively, and the monomer concentration is 2.5 mol / L. The dissolved propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate are mixed, and then a free radical initiator with a concentration of 0.03 mol / L lauroyl peroxide is added. After the precipitate is formed, it is dissolved and reprecipitated with hexane to obtain a high-purity stabilizer RCPFs;

[0025] 2) Weigh 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine according to mass fractions, and obtain a water-soluble degradable film by a drum method at a processing temperature of 138-142° C.;

[0026] 3) The water-soluble and biodegradable poop collection bags are prepared by heat-sealing and cold-cutting in a bag-making machine, with the heat-sealing temperature being 80-90°C and the cold-cutting being performed at room temperature.

[0027] Example 1

[0028] A water-soluble and degradable feces collection bag, which comprises 85 parts of polyvinyl alcohol, 10 parts of starch, 2 parts of sodium alginate, 1 part of plasticizer, 0.5 parts of stabilizer RCPFs, and 1 part of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0029] First, propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer.

[0030] Then, a water-soluble biodegradable film was prepared by the drum method at 140°C, and a bag making machine was used to heat-seal and cold-cut the finished poop bags. The heat-sealing temperature was 80°C, and the cold-cutting was done at room temperature.

[0031] Among them, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate in the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is water chestnut starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer includes epoxidized soybean oil.

[0032] Example 2

[0033] A water-soluble and degradable feces collection bag, which comprises 86 parts of polyvinyl alcohol, 13 parts of starch, 2 parts of sodium alginate, 1 part of plasticizer, 1 part of stabilizer RCPFs, and 2 parts of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0034] First, propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer.

[0035] Then, a water-soluble biodegradable film was prepared at 138°C using a drum method, and a bag making machine was used to heat-seal and cold-cut the finished poop-collecting bags. The heat-sealing temperature was 90°C, and the cold-cutting was performed at room temperature.

[0036] Among them, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate in the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is water chestnut starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer includes glycerol.

[0037] Example 3

[0038] A water-soluble and degradable feces collection bag, which comprises 88 parts of polyvinyl alcohol, 10 parts of starch, 2 parts of sodium alginate, 3 parts of plasticizer, 1 part of stabilizer RCPFs, and 1 part of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0039] First, propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer.

[0040] Then, a water-soluble biodegradable film was prepared at 142°C using a drum method, and a bag making machine was used to heat-seal and cold-cut the finished poop-collecting bags. The heat-sealing temperature was 85°C, and the cold-cutting was performed at room temperature.

[0041] Among them, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate in the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is water chestnut starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer includes epoxidized soybean oil.

[0042] Example 4

[0043] A water-soluble and degradable feces collection bag, which comprises 86 parts of polyvinyl alcohol, 10 parts of starch, 2 parts of sodium alginate, 1 part of plasticizer, 1 part of stabilizer RCPFs, and 2 parts of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0044] First, propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer.

[0045] Then, a water-soluble biodegradable film was prepared at 138°C using a drum method, and a bag making machine was used to heat-seal and cold-cut the finished poop-collecting bags. The heat-sealing temperature was 90°C, and the cold-cutting was performed at room temperature.

[0046] Among them, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate in the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is water chestnut starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer includes citrate.

[0047] Example 5

[0048] A water-soluble and degradable feces collection bag, which comprises 90 parts of polyvinyl alcohol, 15 parts of starch, 2 parts of sodium alginate, 2 parts of plasticizer, 1 part of stabilizer RCPFs, and 1.5 parts of betanin in terms of mass fractions, wherein the stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate.

[0049] First, propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone, and the monomer concentration was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated with hexane to obtain a high-purity stabilizer.

[0050] Then, a water-soluble biodegradable film was prepared at 140°C using a drum method, and a bag making machine was used to heat-seal and cold-cut the finished poop-collecting bags. The heat-sealing temperature was 83°C, and the cold-cutting was performed at room temperature.

[0051] Among them, the volume ratio of propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate in the preparation of the stabilizer RCPFs is 1:2:1:1, the starch is water chestnut starch, the sodium alginate is sodium alginate-polyethylene glycol-polyarginine, and the plasticizer includes epoxy rapeseed oil.

[0052] Dissolution rate % = (original film weight - remaining film weight) / original film weight * 100%

[0053] Experiment 1: Comparison of water solubility

[0054] Compared with the dissolution time of pure polyvinyl alcohol stool collection bag, the dissolution rate is calculated to reach 80%:

[0055]

[0056] Table 1

[0057] It can be seen from Table 1 above that the water-soluble and degradable feces collection bag of the present invention has a significantly shorter dissolution time than a bag made of pure polyvinyl alcohol, which can accelerate the dissolution and prevent the generation of odor.

[0058] Experiment 2 Comparison of the effects of betaine

[0059] Comparative Examples 1, 3 and 5 respectively adopt the formulations in Examples 1, 3 and 5, but choose not to add betaine, and the other components and preparation methods remain unchanged. The dissolution rate is calculated to reach 80%:

[0060] project Comparative Example 1 Example 1 Comparative Example 3 Example 3 Comparative Example 5 Example 5 Dissolution softening time 4.2min 1.7min 3.8min 1.4min 3min 1min

[0061] Table 2

[0062] It can be seen from Table 2 above that the dissolution time of the water-soluble and degradable feces collection bags of Examples 1, 3 and 5 of the present invention is significantly shorter than that of Comparative Examples 1, 3 and 5.

[0063] Experimental comparison of the effects of water chestnut starch

[0064] Comparative Examples 2, 4 and 5' respectively adopt the formulations in Examples 2, 4 and 5, and corn starch or tapioca starch is added as starch, with the solubility rate being calculated to be 80%.

[0065] project Comparative Example 2 Example 2 Comparative Example 4 Example 4 Comparative Example 5' Example 5 Dissolution softening time 3.9min 1.6min 3.3min 1.4min 3.1min 1min

[0066] Table 3

[0067] It can be seen from Table 3 above that the water-soluble and degradable feces collection bags of Examples 2, 4 and 5 of the present invention have a dissolution time that is significantly shorter than that of Comparative Examples 2, 4 and 5'.

[0068] Experiment 4: Comparison of the effects of RCPFs

[0069] Comparative Examples 1', 3' and 4' respectively adopt the formulations of Examples 1, 3 and 4 without adding RCPFs.

[0070] The calculation is based on a dissolution rate of 80%.

[0071] project Comparative Example 1' Example 1 Comparative Example 3' Example 3 Comparative Example 4' Example 4 Dissolution softening time 4.3min 1.6min 3.6min 1.4min 3.6min 1min

[0072] Table 4

[0073] It can be seen from Table 4 above that the water-soluble and degradable feces collection bags of Examples 1, 3 and 4 of the present invention have a dissolution time that is significantly shorter than that of Comparative Examples 1', 3' and 4'.

[0074] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A water-soluble and degradable feces collection bag, characterized by: The feces collection bag comprises 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betanin by weight. The stabilizer RCPFs is copolymerized by propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate, and the starch is one or more of water chestnut starch, corn starch and cassava starch.

2. A water-soluble and degradable feces collection bag according to claim 1, characterized in that: The feces collection bag comprises 85-90 parts of polyvinyl alcohol, 10-13 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine in parts by mass.

3. A water-soluble and degradable feces collection bag according to claim 1, characterized in that: The sodium alginate is sodium alginate-polyethylene glycol-polyarginine.

4. A water-soluble and degradable feces collection bag according to claim 3, characterized in that: The plasticizer includes one of glycerin, epoxidized soybean oil, epoxidized rapeseed oil and citric acid ester.

5. A method for preparing the water-soluble and degradable feces collection bag according to claim 1, characterized in that: 1) Preparation of stabilizer RCPFs: Propylene glycol monomethyl ether, acrylamide, maleic anhydride and butyl methacrylate were dissolved in acetone respectively, and the concentration of each monomer was 2.5 mol / L. The dissolved monomers were mixed, and then a free radical initiator, lauroyl peroxide, was added at a concentration of 0.03 mol / L. After the precipitate was formed, it was dissolved and reprecipitated in hexane to obtain a high-purity stabilizer RCPFs; 2) Weigh 80-90 parts of polyvinyl alcohol, 10-15 parts of starch, 2-3 parts of sodium alginate, 1-3 parts of plasticizer, 0.5-1 parts of stabilizer RCPFs, and 1-2 parts of betaine according to the mass fraction, and prepare a water-soluble biodegradable film by a roller method at a processing temperature of 138-142°C; 3) The water-soluble degradable film is prepared into a water-soluble degradable poop collection bag by using a bag making machine for heat sealing and cold cutting. The heat sealing temperature is 80-90°C, and the cold cutting is performed at room temperature.

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