Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
  • C08L1/02—Cellulose; Modified cellulose
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
  • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
  • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
  • C08J2301/02—Cellulose; Modified cellulose

Definitions

• the invention relates to a sponge product mainly prepared from bamboo pulp raw materials and a preparation method thereof.
• Sponge is a general term for foams. Depending on the materials used, a variety of sponge products with different properties can be produced.
• the traditional sponge products are mainly synthetic resin sponges made of polyurethane and similar materials.
• the chemical name of the sponge is polyurethane foam material, which is divided into soft foam (for furniture) and hard foam (for heat preservation). kind.
• the sponge mop currently seen on the market is not a sponge in the strict sense. It is called PVA cotton, a kind of rubber that can absorb water, which can automatically evaporate water. This kind of mop squeezes out the dirty water after mopping the floor. Finally, it is filled with water to keep it moist for a long time. Just soak it, you don't have to soak it in the water. Be careful not to expose the sun. Before using it for the next time If it is hard to dry, it can be pulled in the hand and then pulled again, otherwise the cotton head will break easily. This type of mop works well with the most common cotton mop in the house.
• both the sponge and the above-mentioned rubber are made of polymer chemical materials, so the product itself has certain environmental pollution and cannot be regenerated.
• Many sponge products are in contact with human skin, which is easy to cause skin to human body. The stimuli, these sponge products are prone to deterioration and hardening after a long period of use, reducing their service life; even worse, they are difficult to handle after use, causing serious pollution, and due to the above characteristics, their use range is limited. Especially in Europe and America. Summary of the invention
• the object of the present invention is to overcome the deficiencies of the prior art, and to provide a bamboo pulp sponge product which can replace the traditional PVA sponge and the PU sponge, adopts the green pure natural raw material and the bamboo as the main material, and is clean and environmentally friendly and has strong regenerative ability. And its preparation method.
• the bamboo pulp sponge product of the present invention which uses bamboo pulp as the main raw material, after soaking, pressing, yellowing, viscose, molding process, and Adding cellulose-enhanced bamboo pulp or wood pulp excipients in the viscose process to produce from 92 to 94% by weight of methylcellulose, 4.5 to 5.5% by weight of S10 cellulose, and 0.5 to 3.5% by weight A sponge product made of cellulose.
• the sponge product is softened with a MgCl 2 softening agent after the molding process, and the sponge product contains a total amount of 1.5 - 2.5% MgCl 2 and 48 - 53% water after softening.
• a method for preparing a bamboo pulp sponge product which mainly uses bamboo pulp as a main raw material, the method comprising the following steps: 1), a soaking process, containing 30-50% by weight of methylcellulose (C 6 H 1Q 0 5 ) n , S10 cellulose and S18 cellulose bamboo pulp raw materials at a temperature of 25-35 ° C, adding 50-70% by weight, a concentration of 11-30% sodium hydroxide a solution that reacts to form AC alkali cellulose, water, and S10 cellulose that is not involved in the reaction;
• a preferred embodiment of the present invention is:
• step 1 the reaction is carried out in a pulper, and the weight percentage of the reacted material is: 40% methylcellulose (C 6 H 1Q 0 5 ) n , S10 cellulose and S18 cellulose bamboo pulp and 60% sodium hydroxide solution;
• step 3 the reaction ratio of AC alkali cellulose to carbon disulfide is 2:1;
• step 5 sodium sulfate or magnesium sulfate crystals are added as pore formers, During the coagulation process, the sodium sulfate or magnesium sulfate crystals are melted to cause the sponge to have small holes of different sizes; after the forming process, the formed sponge product is further subjected to a washing and softening process.
• the cleaning process is to remove excess carbon disulfide, sodium sulfate or magnesium sulfate solution, and the sodium hydroxide impurity is washed away by conventional physical and chemical methods; the softening process is softening by the MgC12 softener after the sponge is molded. Antiseptic to prevent the growth of bacteria and the formation of odors.
• the obtained sponge product has improved performance, and provides a wider application range, and has the following technical effects: First, strong water absorption, rapid expansion and increased elasticity after water absorption; second, pure natural product, texture It is soft and has no stimulating effect on the skin. Thirdly, it has strong decontamination and oil removal ability. It can be used to produce a rich foam after applying a little washing liquid to the surface of the product.
• the fourth is natural anti-mite, it is not mildew after drying; it can be stored for a long time. Storage, the quality is unchanged; Fifth, it can be automatically degraded and decayed after use, and it can be burned without harmful gas. It is a natural and pollution-free product; it can be widely used in cleaning, medical and other fields.
• the bamboo pulp sponge product of the present invention which uses bamboo pulp as the main raw material, after soaking, pressing, yellowing, viscose, molding process, and Adding in the viscose process Strong cellulose bamboo pulp or wood pulp auxiliaries, made of 92-95% by weight of methylcellulose, 4.5-5.5% by weight of S10 cellulose and 0.5-3.5% by weight of reinforced cellulose Sponge products.
• the sponge product is softened with a MgCl 2 softening agent after the molding process, and the sponge product contains a total amount of 1.5 - 2.5% MgCl 2 and 48 - 53% water after softening.
• a method for preparing a bamboo pulp sponge product which mainly uses bamboo pulp as a main raw material, and the method comprises the following steps:
• the bamboo pulp material containing 30-50% by weight of methyl cellulose (C 6 H 1Q 0 5 ) n , S10 cellulose and S18 cellulose is added at a temperature of 25-35 ° C 50-70% by weight, a concentration of 11-30% sodium hydroxide solution, reacting to form AC alkali cellulose, and water; wherein S 10 cellulose does not react with the NaOH solution of the concentration range;
• a preferred embodiment of the present invention is:
• step 1 the reaction is carried out in a pulper, and the weight percentage of the reacted material is: 40% methylcellulose (C 6 H 1Q 0 5 ) n , S10 cellulose and S18 cellulose bamboo pulp and 60% sodium hydroxide solution;
• step 3 the reaction ratio of AC alkali cellulose to carbon disulfide is 2:1;
• step 5 sodium sulfate or magnesium sulfate crystals are added as pore formers, During the coagulation process, the sodium sulfate or magnesium sulfate crystals are melted to cause the sponge to have small holes of different sizes; after the forming process, the formed sponge product is further subjected to a washing and softening process.
• the cleaning process is to remove excess carbon disulfide, sodium sulfate or magnesium sulfate solution, and the sodium hydroxide impurity is washed away by conventional physical and chemical methods; the softening process is softening by the MgC12 softener after the sponge is molded. Antiseptic to prevent the growth of bacteria and the formation of odors.
• Example 1 The present invention selects commercially available bamboo pulp as the main raw material, and the preparation method comprises the following steps: 1. Soaking process: The bamboo pulp is involved in the chemical reaction as follows: cellulose, methyl cellulose (C 6 H 1Q 0 5 ) n S10 fiber Vitamins and S18 cellulose, their ratio is 92-94%, 4.5-5.5%, 0.5-3.5%, reacting with a concentration of 11-30% sodium hydroxide (NaOH) solution at 25-35 degrees Celsius Produces AC alkali cellulose (C 6 H 9 0 4 ONa) n and water, and also includes S10 cellulose which has not undergone chemical reaction.
• Soaking process The bamboo pulp is involved in the chemical reaction as follows: cellulose, methyl cellulose (C 6 H 1Q 0 5 ) n S10 fiber Vitamins and S18 cellulose, their ratio is 92-94%, 4.5-5.5%, 0.5-3.5%, reacting with a concentration of 11-30% sodium hydroxide (NaOH) solution at 25-
• the reaction process is carried out in a pulper, and the proportion of the reacted substance is cellulose (methyl cellulose ( C 6 H 1Q 0 5 ) n S10 cellulose and S18 cellulose collectively) and alkali solution 4:6, the reaction process is as follows: (C 6 H 10 O 5 ) n + nNaOH ⁇ (C 6 H 9 0 4 ONa) n + nH 2 0 ; In this process, methyl cellulose reacts with an alkali solution to form AC alkali cellulose, and S10 cellulose cannot be chemically reacted because it cannot be dissolved in a lye higher than 10%, S18 fiber Dissolving in this concentration range also produces AC alkali cellulose;
• Adhesive process This process requires the addition of another type of pulp, which is stronger than the first one, and the molecular structure is the same as the first one.
• the pulp is such as bamboo pulp or wood pulp, and the fiber contained therein.
• reinforced cellulose they are not involved in chemical reactions throughout the process; they are soaked with xanthate in water for 2-4 hours, the temperature of the water is 1-15 degrees, forming a viscose, the composition of the viscose 30-40% xanthate mixed with S10 cellulose, 3-7% bamboo pulp or wood pulp containing cellulose, 50-65% moisture; experimentally found, adding another in the adhesive Undissolved cellulose microparticles (enhanced cellulose), then these undissolved celluloses have the effect of reinforcing agents, so these post-added celluloses are collectively referred to as reinforced cellulose;
• Molding process the viscose and sodium sulfate crystals are mixed. After standing for 6 hours, they are put into a mold to form, and then condensed by current condensation. During the continuous condensation process, the sodium sulfate crystals are melted to make the sponge have small holes of different sizes. The role of the small hole is that the sponge has better water absorption.
• a gas recovery device (C 6 H 9 0 4 0-SC-SNa) n + nH20 + E ⁇ (C 6 H 10 O 5 ) n + nCS2 + n NaOH;
• the sodium sulphate crystals may be replaced by magnesium sulfate crystals or other pore formers and constitute other embodiments as described below; formed into a sponge product composed of methyl cellulose, S10 cellulose, and reinforced cellulose. ;
• the sponge After the sponge is molded, it will pass softening (the main component of softener is MgC12), anti-corrosion measures to prevent bacteria The growth and odor generation.
• the components of the last sold sponge product are methylcellulose, S10 cellulose and reinforced cellulose, but in the softening process, the sponge product contains magnesium chloride and water. Their proportions are (methylcellulose + S10 cellulose + reinforced cellulose) 47%, 2% magnesium chloride, 51% water. With the use of consumers, magnesium chloride will gradually disappear until the content is 0, the water can also be squeezed according to actual needs, the real sponge component is 92-94% methylcellulose, 4.5-5.5% S10 cellulose , 0.5-3.5% enhanced strength cellulose.
• the main scope of use of the invention is as follows: First, household cleaning: It has strong water absorption, flexibility, washing resistance, solvent resistance, non-stick oil, easy air drying and other characteristics (kitchen washing, bathing, etc.); second, industrial cleaning: suitable for Surface cleaning of industrial agriculture and machinery can completely remove dirt and oil stains (car wash, soldering iron and cleaning printing equipment); Third, medical beauty: soft and non-stimulus; used to wipe the face can effectively remove facial smear Skin care products, long-term use can eliminate blackheads.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

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• 2010
  • 2010-09-09 CN CN 201010275805 patent/CN101942112B/zh active Active
• 2011
  • 2011-07-12 WO PCT/CN2011/077079 patent/WO2012031502A2/fr active Application Filing

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