CN110591617B - Three-dimensional core body forming hot melt adhesive and preparation method and application thereof - Google Patents
Three-dimensional core body forming hot melt adhesive and preparation method and application thereof Download PDFInfo
- Publication number
- CN110591617B CN110591617B CN201910766926.4A CN201910766926A CN110591617B CN 110591617 B CN110591617 B CN 110591617B CN 201910766926 A CN201910766926 A CN 201910766926A CN 110591617 B CN110591617 B CN 110591617B
- Authority
- CN
- China
- Prior art keywords
- core body
- hot melt
- melt adhesive
- parts
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J157/00—Adhesives based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09J157/02—Copolymers of mineral oil hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
- C09J193/04—Rosin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a three-dimensional core body forming hot melt adhesive and a preparation method and application thereof, wherein the three-dimensional core body forming hot melt adhesive comprises the following components in parts by weight: 10-50 parts of polymer, 5-30 parts of plasticizer, 25-60 parts of tackifying resin, 0.1-2 parts of antioxidant, 0-20 parts of liquid resin and 0-20 parts of polyisobutylene. The hot melt adhesive can be used for molding the macromolecular water-absorbent resin and/or the wood pulp in the core body of the disposable absorbent product, has higher wet peel strength, moderate initial adhesion and good elastic recovery rate, can be applied to the macromolecular water-absorbent resin and/or the wood pulp station in the core body, and after the core body is wetted, the macromolecular water-absorbent resin or the wood pulp cannot be agglomerated, fall off or broken.
Description
Technical Field
The invention relates to the technical field of application of hot melt adhesives, in particular to a three-dimensional core body forming hot melt adhesive and a preparation method and application thereof.
Background
The hot melt adhesive is a plastic adhesive and belongs to an environment-friendly chemical product. In the field of industrial adhesives, hot melt adhesives (i.e., common hot melt adhesives) are commonly used to bond together a wide variety of articles, including disposable absorbent articles having nonwoven substrates, such as diapers, pull-ups, adult diapers, baby mattresses, absorbent underpants, pet pads, sanitary napkins, nursing, care pads, and the like; the hot melt adhesive can also be used to form core composites which can be used in disposable absorbent articles where the core structure is primarily intended to absorb liquids such as urine, which requires that the core after wetting, the superabsorbent polymer and/or wood pulp do not clump or break; however, the high molecular water-absorbent resin and/or wood pulp in the core body at present use the traditional hot melt adhesive, and the high molecular water-absorbent resin and/or wood pulp are easy to fall off, agglomerate or break after being wetted, for example, the traditional hot melt adhesive commonly used in the market for producing the paper diaper comprises the components of a plasticizer, SIS, tackifying resin, an antioxidant and the like, and the hot melt adhesive is proved by practice to have poor moisture resistance, cannot play a role in shaping the water-absorbent substance of the core body, and is easy to fall off, agglomerate or break after being wetted; when used for the production of paper diapers, the peel strength of the paper diapers is tested to reach 3.2N/mm under a dry environment, and once the paper diapers are placed into physiological saline for soaking for half an hour, the wood fibers, non-woven fabrics, toilet paper and the like in the paper diapers are completely degummed or dispersed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a three-dimensional core body forming hot melt adhesive. The core body molding hot melt adhesive has high stripping force, moderate initial adhesion and good elasticity recovery rate, and can be used for molding high-molecular water-absorbent resin or/and wood pulp in the core body of a disposable absorbent product.
The invention also aims to provide a preparation method of the three-dimensional core body forming hot melt adhesive. The invention optimizes the preparation process, has strong operability, high production efficiency and simple production process, does not need special equipment and is suitable for large-scale production.
The invention also aims to provide application of the three-dimensional core body molding hot melt adhesive. The three-dimensional core body forming hot melt adhesive is applied to a three-dimensional core body as a forming agent.
One of the purposes of the invention is realized by adopting the following technical scheme: a three-dimensional core body forming hot melt adhesive comprises the following components in parts by weight: 10-50 parts of polymer, 5-30 parts of plasticizer, 25-60 parts of tackifying resin, 0.1-2 parts of antioxidant, 0-20 parts of liquid resin and 0-20 parts of polyisobutylene.
Further, the core body forming hot melt adhesive also comprises 1-5 parts by weight of wax.
Further, the core body forming hot melt adhesive also comprises one or more than two of ultraviolet absorbent, pigment and filler.
Further, the polymer is one or a mixture of more than two of hydrogenated styrene-butadiene block copolymer, maleic anhydride modified hydrogenated styrene-butadiene block copolymer, styrene-butadiene-butylene-styrene block copolymer, styrene-butadiene-styrene block copolymer, polyolefin, amorphous poly-alpha olefin, polyethylene homopolymer/copolymer, polypropylene homopolymer/copolymer or ethylene-vinyl acetate.
Further, the plasticizer is one of naphthenic oil, white oil, phthalate esters and low-molecular-weight polybutadiene.
Further, the tackifying resin is one or a mixture of more than two of C5 petroleum resin, hydrogenated DCPD petroleum resin, maleic anhydride modified rosin ester, C5/C9 copolymerized petroleum resin, terpene resin and modified resin thereof, rosin resin, hydrogenated C5 petroleum resin or hydrogenated C9 petroleum resin.
The second purpose of the invention is realized by adopting the following technical scheme: a preparation method of a three-dimensional core body forming hot melt adhesive comprises the following steps:
s1: confirming that a bottom valve of the reaction kettle is closed, opening steam for heating, starting a stirring paddle, and adding a plasticizer and an antioxidant;
s2: the temperature of the reaction kettle of S1 is raised to 135-145 ℃, and the polymer is added and stirred until the polymer is melted;
s3: uniformly adding tackifying resin into the reaction kettle of S2, adding liquid resin and polyisobutylene after the tackifying resin is completely melted, and fully reacting;
s4: after the reaction in the S3 is finished, filtering the molten material in the reaction kettle;
s5: and (4) sequentially passing the molten material filtered in the step (S4) through a cooling system and a drying system, and finally packaging.
Further, adding the polymer into S2, stirring for 13-16min, scraping the polymer on the wall of the reaction kettle and the stirring paddle by using a scraper, and continuing stirring; stirring for 42-46min to determine whether the sample is completely molten, and if there are particles, continuing stirring and recording the extended stirring time.
Further, after the materials are added in S3, the reaction kettle is vacuumized, the temperature in the reaction kettle is kept at 135-145 ℃, and when the vacuum degree is more than 0.07 and the materials are not expanded, the vacuum is pumped for 25-40 min.
The third purpose of the invention is realized by adopting the following technical scheme: the application of the three-dimensional core body forming hot melt adhesive is applied to a three-dimensional core body as a forming agent, wherein the three-dimensional core body is one of a diaper/pants water locking core body, a pull-up pants water locking core body, an adult diaper water locking core body, a baby mattress water locking core body, an absorption underpants water locking core body, a pet mattress water locking core body, a sanitary towel water locking core body, a protection pad water locking core body and a nursing pad water locking core body.
Compared with the prior art, the invention has the beneficial effects that:
(1) the core body molding hot melt adhesive prepared by the invention has higher peeling force, moderate initial adhesion and good elastic recovery rate;
(2) the core forming hot melt adhesive prepared by the invention can provide core forming performance and wet strength performance, so that the high-molecular water-absorbent resin or wood pulp is positioned, and the high-molecular water-absorbent resin or wood pulp is prevented from agglomerating, dispersing or falling off;
(3) the invention optimizes the preparation process, has strong operability, high production efficiency and simple production process, does not need special equipment and is suitable for large-scale production.
Drawings
FIG. 1 is a diaper application product made of a hot melt adhesive according to a conventional preparation process in the prior art;
fig. 2 is a schematic structural view of the application of the three-dimensional core body forming hot melt adhesive to the diaper according to the preferred embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.
A three-dimensional core body forming hot melt adhesive comprises the following components in parts by weight: 10-50 parts of polymer, 5-30 parts of plasticizer, 25-60 parts of tackifying resin, 0.1-2 parts of antioxidant, 0-20 parts of liquid resin and 0-20 parts of polyisobutylene.
Preferably, the core body forming hot melt adhesive comprises, by weight, 12-35 parts of a polymer, 10-25 parts of a plasticizer, 35-55 parts of tackifying resin, 0.4-2 parts of an antioxidant, 1-10 parts of liquid resin, and 1-10 parts of polyisobutylene.
Preferably, the core body forming hot melt adhesive comprises, by weight, 18-25 parts of a polymer, 18-25 parts of a plasticizer, 45-55 parts of tackifying resin, 1-1.8 parts of an antioxidant, 3-4.5 parts of liquid resin, and 3-4.5 parts of polyisobutylene.
As a further preferred embodiment, the core forming hot melt adhesive also comprises 1 to 5 parts by weight of wax.
As a further preferred embodiment, the core body forming hot melt adhesive also comprises one or more of a composition of an ultraviolet absorber, a pigment and a filler. The ultraviolet absorbent accounts for 0.1-1% of the weight of the core body forming hot melt adhesive, the pigment accounts for 0.1-1% of the weight of the core body forming hot melt adhesive, and the filler accounts for 0.1-3% of the weight of the core body forming hot melt adhesive.
As a further preferred embodiment, the polymer is one or a mixture of two or more of a hydrogenated styrene-butadiene block copolymer (SEBS), a maleic anhydride-modified hydrogenated styrene-butadiene block copolymer, a styrene-butadiene-butylene-styrene block copolymer (SBBS), a styrene-butadiene-styrene block copolymer, a polyolefin (maleic anhydride-modified metallocene polyolefin or POE), an amorphous poly-alpha olefin, a polyethylene homopolymer/copolymer, a polypropylene homopolymer/copolymer, or ethylene-vinyl acetate.
In the present embodiment, the hydrogenated styrene-butadiene block copolymer (SEBS) includes SEBS YH-501 and SEBS YH-502 of the medium petrochemicals barlingpetrochemical company, SEBS FG1901 of the american kraton company; the styrene-butadiene-butylene-styrene block copolymer (SBBS) includes SBBSN505 of asahi chemical company; the ethylene-isoprene-styrene (SIS) comprises SIS-1225 of Shangyang Ba Ling Huaxing petrochemical Co., Ltd, SIS 1300 and SIS 1120 of Shandong Poly St science Co., Ltd; the polyolefin includes polyolefin W200 from dow chemical company. The most preferred polymer is a hydrogenated styrene-butadiene block copolymer of SEBS FG1901 from Keteng, USA.
In a further preferred embodiment, the plasticizer is one of naphthenic oil, white oil, phthalate esters, and low molecular weight polybutadiene (1, 2-LPB).
As a further preferred embodiment, the tackifying resin is one or a mixture of two or more of C5 petroleum resin, hydrogenated DCPD petroleum resin, maleic anhydride modified rosin ester, C5/C9 copolymerized petroleum resin, terpene resin and modified resin thereof, rosin resin, hydrogenated C5 petroleum resin or hydrogenated C9 petroleum resin.
In the present embodiment, the terpene resin modified resin is a terpene phenol resin modified with phenol; the rosin resin comprises hydrogenated rosin resin and polymerized rosin resin disproportionated rosin resin.
In the present embodiment, the hydrogenated C5 petroleum resin comprises hydrogenated C5 petroleum resin from eastman corporation; the hydrogenated DCPD petroleum resin comprises hydrogenated DCPD petroleum resin from Istmann; the hydrogenated C9 petroleum resin comprises hydrogenated C9 petroleum resin of Hebei Ming chemical engineering science and technology Limited; the maleic anhydride-modified rosin ester includes maleic anhydride-modified rosin ester of choma chemical industry ltd, guangxi; the C5/C9 copolymerized petroleum resin comprises C5/C9 copolymerized petroleum resin of Shandong Landun petroleum resin Co., Ltd; the most preferred tackifying resin is hydrogenated C5 petroleum resin from Istman.
As a further preferred embodiment, the antioxidant may be present in an amount of about 0.1 parts to parts by weight, and preferably about 0.4-2 parts by weight. The antioxidants help protect the component stability of the three-dimensional core-forming hot melt adhesive, and thus the entire hot melt adhesive system, from thermal and oxidative degradation that typically occurs during the manufacture and application of the hot melt adhesive and the end product is typically exposed to the ambient environment. Such degradation is typically manifested by deterioration in the appearance, physical properties, and performance characteristics of the hot melt adhesive. The antioxidant is one of 1010 type antioxidant of Fushan Yuan Sheng chemical Co., Ltd and 168 type antioxidant of Fushan Yuan Sheng chemical Co., Ltd.
In a further preferred embodiment, the liquid resin is one of a liquid resin of Isyman with model number C8010 and a liquid resin of Shenzhen Yingqu chemical industry Limited with model number Wingtack 10.
In a further preferred embodiment, the polyisobutylene is one or both of polyisobutylene with model number PB450 from jialin chemical technology co.
As a further preferred embodiment, the wax can be one or two of the models W1111 and P-80B of the high and new plastic and high material company Limited in Qingdao and the models SX-105 and SX-80 of the Shenfeng Cheng chemical technology company Limited; it may also be a maleic anhydride modified wax, microcrystalline wax, Fischer-Tropsch wax, paraffin wax or PE wax.
The preparation method of the three-dimensional core body forming hot melt adhesive comprises the following steps:
s1: confirming that a bottom valve of the reaction kettle is closed, opening steam for heating, starting a stirring paddle, and adding a plasticizer and an antioxidant;
s2: the temperature of the reaction kettle of S1 is raised to 135-145 ℃, and the polymer is added and stirred until the polymer is melted;
s3: uniformly adding tackifying resin into the reaction kettle of S2, adding liquid resin and polyisobutylene after the tackifying resin is completely melted, and fully reacting;
s4: after the reaction in the S3 is finished, filtering the molten material in the reaction kettle;
s5: and (4) sequentially passing the molten material filtered in the step (S4) through a cooling system and a drying system, and finally packaging.
In a further preferred embodiment, the polymer is added into S2, then the mixture is stirred for 13-16min, the polymer on the wall of the reaction kettle and the stirring paddle is scraped by a scraper, and the stirring is continued; stirring for 42-46min to determine whether the sample is completely molten, and if there are particles, continuing stirring and recording the extended stirring time.
As a further preferred embodiment, after the material is added in S3, the reaction kettle is vacuumized, the temperature in the reaction kettle is kept at 135-145 ℃, and when the vacuum degree is above 0.07 and the material is not expanded, the vacuum is pumped for 25-40 min.
Regarding the preparation process, the process requirement of the common hot melt adhesive is lower, only the simple physical mixing is carried out, and no reaction process exists;
in this embodiment, the main focus of the preparation process is as follows:
(1) the raw material adding sequence is as follows: some raw materials, such as rubber, can not be melted after being added;
(2) heating temperature: because the softening point of part of raw materials such as resin is higher and the corresponding temperature requirement is needed, the temperature of the reaction kettle is kept at 135-145 ℃ which is one of the key steps in the whole preparation process; if the temperature is too high, the finished product is degraded due to long production time and long-time heating and stirring, various performances are greatly reduced, and the appearance is darkened;
(3) importance of sampling in the production process: after a certain raw material is added, the raw material is ensured to be completely melted; particularly, when the polymer is added, the stirring process needs to confirm that the polymer is completely melted, because the temperature in the reaction kettle can be rapidly reduced when new raw materials are added into the reaction kettle every time, if petroleum resin is to be added, the feeding speed needs to be slowed down, the rapid reduction of the temperature in the reaction kettle is avoided, and the polymer can not be melted any more due to the follow-up possibility under the condition that the polymer is not confirmed to be completely melted, so that the performance of a finished product is seriously influenced because raw material particles of the polymer which is not melted exist in the final finished product.
The third purpose of the invention is realized by adopting the following technical scheme: the application of the three-dimensional core body forming hot melt adhesive is applied to a three-dimensional core body as a forming agent, wherein the three-dimensional core body is one of a diaper/pants water locking core body, a pull-up pants water locking core body, an adult diaper water locking core body, a baby mattress water locking core body, an absorption underpants water locking core body, a pet mattress water locking core body, a sanitary towel water locking core body, a protection pad water locking core body and a nursing pad water locking core body. After the composite core body wet water prepared by the three-dimensional core body forming hot melt adhesive is used, the high-molecular water-absorbent resin or the wood pulp can not be transferred or fall off, and the phenomena of lump formation and the like are avoided.
In the present embodiment, the core to which the three-dimensional core-forming hot melt adhesive is applicable comprises a first base material and a second base material which are nonwoven; the nonwoven material is air-laid, carded and hydroentangled; the nonwoven material is extensible in the cross-web direction to greater than 100%.
The following are specific examples of the present invention, and raw materials, equipments and the like used in the following examples can be obtained by purchasing them unless otherwise specified.
Examples 1 to 14 and comparative example 1
The raw materials are weighed according to the mixture ratio in the following table 1, the hot melt adhesive is prepared according to the preparation method shown in the table 1, and the hot melt adhesives of different embodiments are correspondingly obtained, and the details are shown in the table 1:
table 1: raw material proportioning tables of examples 1-14 and comparative examples
Remarking: when the polymers are mixtures, the ratio of the two polymers is 1: 1; the ratio of the two polyisobutenes used is 1:1 in the case of a mixture of polyisobutenes and 1:1 in the case of a mixture of waxes.
The above examples 1-14 were prepared according to the following preparation method:
s1: weighing raw materials such as a polymer, a plasticizer, tackifying resin, an antioxidant, liquid resin, polyisobutylene, wax and the like according to the dosage proportion; confirming that a bottom valve of the reaction kettle is closed, opening steam for heating, starting a stirring paddle, and adding a plasticizer and an antioxidant according to the formula amount;
s2: heating the temperature of the reaction kettle of S1 to 135-145 ℃, adding the polymer with the formula amount, stirring for 15min, scraping the polymer on the wall of the reaction kettle and the stirring paddle by using a scraper, continuing stirring, after stirring for 45min, sampling to observe whether the polymer is completely molten, if particles still exist, continuing stirring, and recording the prolonged stirring time until the polymer is completely molten;
s3: slowly and uniformly adding the tackifying resin with the formula amount into the reaction kettle of S2, adding the liquid resin, polyisobutylene and wax with the formula amount after the tackifying resin is completely melted, vacuumizing the reaction kettle after the tackifying resin is completely added, keeping the temperature in the reaction kettle at 135-145 ℃, vacuumizing for 25-40min when the vacuum degree is more than 0.07 and the material is not expanded, and fully reacting;
s4: after the reaction in the S3 is finished, filtering the molten material in the reaction kettle;
s5: and (4) sequentially passing the molten material filtered in the step (S4) through a cooling system and a drying system, and finally packaging.
Comparative example 1 is a conventional hot melt adhesive, and the preparation method thereof is: the individual components are simply physically mixed.
Comparative examples 2 to 4
Example 5 is a preferred example of the present invention, and comparative examples 2 to 4 were prepared by weighing the corresponding raw materials according to the ratio in example 5, and then performing the steps in example 5, except that the processing parameters in steps S2 to S3 in the preparation method were different, as detailed in table 2:
table 2: comparative examples 2 to 4 preparation Process parameter tables
| Step S2 | Step S3 | |
| Comparative example 2 | The temperature of the reaction kettle of S1 is raised to 110-120 DEG C | The process parameters of the step S3 are not changed |
| Comparative example 3 | The temperature of the reaction kettle of S1 is raised to 155-165 DEG C | The process parameters of the step S3 are not changed |
| Comparative example 4 | The process parameters of the step S2 are not changed | Without vacuum pumping of the reaction kettle |
Effect evaluation and Performance detection
1. Viscosity test method
The viscosity was measured according to the GB/T2794 specification using a viscometer of the DV2TRVT type from Bohler Miller USA and a spindle 27. The results are reported in centipoise (cps).
2. Softening point test method
The softening point was measured according to GB/T15332 using the SD-0606T automated softening point tester from Shanghai institute of geosciences. Results are reported in degrees Celsius (. degree. C.).
3. Test for falling-off of Water-absorbing particles
The length of the three-dimensional core structure sample is cut to be 20cm, the three-dimensional core structure sample is placed in a box folded by release paper to be spread, and whether the water absorption particles in the three-dimensional core structure sample fall off in a dry state or not is checked. The structure of the three-dimensional core body comprises a first breathable sheet layer, a water absorption layer and a second breathable sheet layer from bottom to top; the three-dimensional core body forming hot melt adhesive and the water-absorbing particles are uniformly mixed to form the water-absorbing layer. The preparation method of the three-dimensional core structure comprises the following steps: (1) spraying wet strong glue on the upper surface of the first breathable sheet layer through a first spraying machine; the spraying temperature of the first spraying machine is 140-155 ℃, and the sizing amount is set to be 6g/m2(ii) a (2) Arranging a second spraying machine and a powder spreader above the first breathable sheet layer, wherein the second spraying machine sprays the formed hot melt adhesive in the air, and the powder spreader sprays water-absorbing particles in the air, so that the formed hot melt adhesive and the water-absorbing particles are uniformly mixed in the air; the second spraying machine sprays and forms the hot melt adhesive, the spraying temperature is 150-175 ℃, and the gluing amount is set to be 6-10g/m2(ii) a The powder spreader sprays water-absorbing particles, and the spraying amount of the water-absorbing particles is set to 200-2(ii) a (3) Spraying and positioning hot melt adhesive on the surface of the second breathable sheet layer through a third spraying machine; the spraying temperature of the third spraying machine is 140-2(ii) a (4) Compounding a second breathable sheet layer sprayed with positioning hot melt adhesive on the upper surface of the first breathable sheet layer, and coating a mixture of water-absorbing particles and formed hot melt adhesive between the first breathable sheet layer and the second breathable sheet layer in a certain three-dimensional shape; (5) and (3) carrying out hot-pressing compounding on the peripheries of the first breathable sheet layer and the second breathable sheet layer to form the three-dimensional composite core body.
4. Wet peel strength test method for water-absorbing particles
The three-dimensional core is prepared according to the preparation method of the three-dimensional core structure. Sampling is carried out for 400mm, 500 ml of distilled water with the temperature of 23-25 ℃ is poured onto the sample core body rapidly and is absorbed naturally, the solid core body is shaken to observe whether the water-absorbing particles in the solid core body structure sample fall off or not in the state after water absorption.
The test results of the above test items are shown in table 3:
table 3: test data summary sheet
As shown by the viscosity data in the above table, the temperature for the optimum spraying effect of the hot melt adhesive with high viscosity is higher than the temperature for the optimum spraying effect of the hot melt adhesive with low viscosity at the same temperature during the use of the hot melt adhesive, i.e., the temperature for the optimum spraying effect of the hot melt adhesive of the present invention is 16-170 ℃, while the temperature for the optimum spraying effect of the hot melt adhesive of comparative example 1 is 150-160 ℃. The viscosity of the invention is higher than that of the prior art, and the invention has the advantages that under the same condition, the temperature of the optimal spraying effect of the hot melt adhesive is high, the opening time can be properly increased, and the processing is utilized. The process of the equipment corresponding to the product is different from the process of the equipment corresponding to the product in the prior art, the process opening distance of the equipment corresponding to the product is a little longer, the required opening time is also a little longer, the viscosity of the spraying agent is high, the temperature of the optimal spraying effect is a little higher, and under the same condition, the opening time can be properly increased due to the high temperature.
In the test of the falling of the water-absorbing particles, the hot melt adhesive of the prior art is applied to the core body of the prior art, and a layer of fluffy non-woven fabric is arranged in the middle of the core body for locking the water-absorbing particles, while the hot melt adhesive of the prior art of the comparative example 1 is applied to the three-dimensional core body of the invention, and the water-absorbing particles are easy to fall off because the fluffy non-woven fabric is not arranged in the middle of the core body. The improved hot melt adhesive in the embodiments of the invention is applied to the three-dimensional core body, and even if fluffy non-woven fabrics are not arranged in the middle of the three-dimensional core body, the water-absorbing particles can be locked by the glue threads of the improved hot melt adhesive, so that the water-absorbing particles can not fall off.
In addition, the hot melt adhesive prepared by the invention is applied to the core body, and has more excellent wet peel strength; in addition, the core body molding hot melt adhesive prepared in the embodiments 1 to 14 of the present invention also has excellent properties such as wet strength and cohesiveness, after the core body is wetted, the high molecular water-absorbent resin or wood pulp does not transfer or fall off, as shown in fig. 2, the shape of the core body still conforms to the shape of the original high molecular water-absorbent resin, while fig. 1 shows that the high molecular water-absorbent resin expands, becomes amorphous, and even falls off after the hot melt adhesive absorbs moisture. In particular, when the shaped hot melt adhesive contains at least 30% by weight of a styrenic block copolymer having a melt flow rate of at least about 15g/10min (190 ℃, 2.16kg) and a diblock content of the styrenic block copolymer of not more than 20% by weight, the shaped hot melt adhesive has a viscosity of not more than about 5,000cps at 175 ℃, with higher melt flow rates and lower viscosities leading to better spray results; and the core body can keep sufficient wetting property on water-absorbing resin and the like, and the water-absorbing particles can not be transferred or fall off after the core body is wetted, so that the effect is optimal.
Finally, as can be seen from the data of comparative examples 2-3 and example 5, the temperature of the reaction kettle is maintained at 135-145 ℃ in the preparation process of the present invention, which is one of the key steps in the whole preparation process; if the temperature is too high, the finished product is degraded due to long production time and long-time heating and stirring, various performances are greatly reduced, and the appearance is darkened; in addition, the comparative example 4 and the example 5 can ensure that the reaction is more fully performed under the condition of vacuumizing, and the performance of the hot melt adhesive is improved.
The manufacturer information of the components used in the above examples and comparative examples is shown in Table 4
Table 4: manufacturer table of each component
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. The three-dimensional core body forming hot melt adhesive is characterized by comprising the following components in parts by weight: 18-25 parts of polymer, 18-25 parts of plasticizer, 45-55 parts of tackifying resin, 1-1.8 parts of antioxidant, 3-4.5 parts of liquid resin and 3-4.5 parts of polyisobutylene;
the polymer is selected from one or a mixture of two of hydrogenated styrene-butadiene block copolymer and styrene-butadiene-butylene-styrene block copolymer.
2. The three-dimensional core forming hot melt adhesive of claim 1, wherein the core forming hot melt adhesive further comprises 1-5 parts by weight of wax.
3. The three-dimensional core-forming hot melt adhesive according to claim 1, wherein the core-forming hot melt adhesive further comprises one or more of a combination of ultraviolet absorbers, pigments and fillers.
4. The solid core forming hot melt adhesive of claim 1, wherein the plasticizer is one of naphthenic oil, white oil, phthalate esters and low molecular weight polybutadiene.
5. The three-dimensional core forming hot melt adhesive according to claim 1, wherein the tackifying resin is one or a mixture of two or more of C5 petroleum resin, hydrogenated DCPD petroleum resin, maleic anhydride modified rosin ester, C5/C9 copolymerized petroleum resin, terpene resin and modified resin thereof, rosin resin, hydrogenated C5 petroleum resin or hydrogenated C9 petroleum resin.
6. The preparation method of the three-dimensional core body forming hot melt adhesive as claimed in claim 1, characterized by comprising the following steps:
s1: confirming that a bottom valve of the reaction kettle is closed, opening steam for heating, starting a stirring paddle, and adding a plasticizer and an antioxidant;
s2: the temperature of the reaction kettle of S1 is raised to 135-145 ℃, and the polymer is added and stirred until the polymer is melted;
s3: uniformly adding tackifying resin into the reaction kettle of S2, adding liquid resin and polyisobutylene after the tackifying resin is completely melted, and fully reacting;
s4: after the reaction in the S3 is finished, filtering the molten material in the reaction kettle;
s5: and (4) sequentially passing the molten material filtered in the step (S4) through a cooling system and a drying system, and finally packaging.
7. The method for preparing the three-dimensional core body forming hot melt adhesive as claimed in claim 6, wherein the polymer is added in S2 and then stirred for 13-16min, the polymer on the tank wall of the reaction kettle and the stirring paddle is scraped off by a scraper, and the stirring is continued; stirring for 42-46min to determine whether the sample is completely molten, and if there are particles, continuing stirring and recording the extended stirring time.
8. The method for preparing a three-dimensional core body molding hot melt adhesive as claimed in claim 6, wherein in S3, after the material is added, the reaction kettle is vacuumized, the temperature in the reaction kettle is kept at 135-145 ℃, and when the vacuum degree is above 0.07 and the material is not expanded, the vacuum is pumped for 25-40 min.
9. The use of the three-dimensional core body forming hot melt adhesive according to claim 1, wherein the three-dimensional core body forming hot melt adhesive is used as a forming agent on a three-dimensional core body, and the three-dimensional core body is one of a diaper/pants water locking core body, a pull-up pants water locking core body, an adult diaper water locking core body, a baby mattress water locking core body, an absorption underpants water locking core body, a pet pad water locking core body, a sanitary napkin water locking core body, a protection pad water locking core body and a nursing pad water locking core body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766926.4A CN110591617B (en) | 2019-08-20 | 2019-08-20 | Three-dimensional core body forming hot melt adhesive and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766926.4A CN110591617B (en) | 2019-08-20 | 2019-08-20 | Three-dimensional core body forming hot melt adhesive and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110591617A CN110591617A (en) | 2019-12-20 |
| CN110591617B true CN110591617B (en) | 2022-02-08 |
Family
ID=68855128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910766926.4A Active CN110591617B (en) | 2019-08-20 | 2019-08-20 | Three-dimensional core body forming hot melt adhesive and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110591617B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114716950B (en) * | 2021-07-31 | 2023-11-28 | 无锡市万力粘合材料股份有限公司 | Hot-melt pressure-sensitive adhesive for cotton picker packing adhesive tape and preparation method thereof |
| CN114533405B (en) * | 2022-01-24 | 2024-01-23 | 佛山南宝高盛高新材料有限公司 | Novel elastic absorption core and preparation method thereof |
| CN115820163A (en) * | 2022-09-21 | 2023-03-21 | 江苏嘉好热熔胶股份有限公司 | Hygienic product structural adhesive with excellent thermal stability and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104830257A (en) * | 2015-04-16 | 2015-08-12 | 衢州市富星和宝黏胶工业有限公司 | Hot melt adhesive for production of paper diapers and preparation method thereof |
| CN106047287A (en) * | 2016-05-30 | 2016-10-26 | 广东荣嘉新材料科技有限公司 | Low-temperature hot-melt pressure-sensitive adhesive for disposable hygienic product and preparation method thereof |
| CN110023441A (en) * | 2016-11-22 | 2019-07-16 | 汉高股份有限及两合公司 | The extrudable contact adhesive based on poly 1-butene polymer and styrol copolymer suitable for reclosable package |
| CN110205065A (en) * | 2019-06-18 | 2019-09-06 | 佛山南宝高盛高新材料有限公司 | A kind of elasticity hot-fusible pressure-sensitive adhesive and the preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7795336B2 (en) * | 2002-10-18 | 2010-09-14 | Henkel Ag & Co. Kgaa | Low application temperature hot melt adhesive |
-
2019
- 2019-08-20 CN CN201910766926.4A patent/CN110591617B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104830257A (en) * | 2015-04-16 | 2015-08-12 | 衢州市富星和宝黏胶工业有限公司 | Hot melt adhesive for production of paper diapers and preparation method thereof |
| CN106047287A (en) * | 2016-05-30 | 2016-10-26 | 广东荣嘉新材料科技有限公司 | Low-temperature hot-melt pressure-sensitive adhesive for disposable hygienic product and preparation method thereof |
| CN110023441A (en) * | 2016-11-22 | 2019-07-16 | 汉高股份有限及两合公司 | The extrudable contact adhesive based on poly 1-butene polymer and styrol copolymer suitable for reclosable package |
| CN110205065A (en) * | 2019-06-18 | 2019-09-06 | 佛山南宝高盛高新材料有限公司 | A kind of elasticity hot-fusible pressure-sensitive adhesive and the preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110591617A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110591617B (en) | Three-dimensional core body forming hot melt adhesive and preparation method and application thereof | |
| JP4955146B2 (en) | Composition comprising a thermoplastic component and a superabsorbent polymer | |
| US10138398B2 (en) | Low application temperature hot melt adhesive | |
| CN103189461B (en) | The amorphous poly-alpha-olefin adhesive of low application temperature | |
| CA2398000C (en) | Hot melt adhesive based on semicrystalline polyolefin copolymers | |
| EP1053364B1 (en) | Method of making disposable nonwoven articles with microwave activatable hot melt adhesive | |
| BR112013025928B1 (en) | thermosetting adhesive composition | |
| AU2003286679A1 (en) | Hot melt adhesive composition based on a random copolymer of isotactic polypropylene and a secondary polymer | |
| CN110464547B (en) | Three-dimensional composite core and preparation method and application thereof | |
| US20100249313A1 (en) | High Styrene SBS Hot Melt Adhesive | |
| CN113853415B (en) | Hot melt composition comprising a styrene block copolymer and a wax | |
| CN114829531A (en) | Hot melt adhesive composition | |
| CN113840888A (en) | Hot melt adhesive composition based on olefin block copolymers | |
| CN114533405B (en) | Novel elastic absorption core and preparation method thereof | |
| WO2023283564A1 (en) | Low polymer content propylene polymer-based hot melt adhesive composition | |
| EP4186956A1 (en) | Hot melt adhesive composition | |
| CN114096223A (en) | Hot melt adhesive composition suitable for disposable hygiene articles, free of tackifiers | |
| MXPA00007755A (en) | Method of making disposable nonwoven articles with microwave activatable hot melt adhesive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |