CN114921206B - Hot melt adhesive for cutting paper diaper S and preparation method thereof - Google Patents
Hot melt adhesive for cutting paper diaper S and preparation method thereof Download PDFInfo
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- CN114921206B CN114921206B CN202210628369.1A CN202210628369A CN114921206B CN 114921206 B CN114921206 B CN 114921206B CN 202210628369 A CN202210628369 A CN 202210628369A CN 114921206 B CN114921206 B CN 114921206B
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- 239000004831 Hot glue Substances 0.000 title claims abstract description 86
- 238000005520 cutting process Methods 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 111
- 239000011347 resin Substances 0.000 claims abstract description 111
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 58
- 239000003208 petroleum Substances 0.000 claims abstract description 54
- 229920000642 polymer Polymers 0.000 claims abstract description 36
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 31
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 31
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004014 plasticizer Substances 0.000 claims abstract description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 15
- 239000002781 deodorant agent Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012768 molten material Substances 0.000 claims description 8
- 238000004898 kneading Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 230000001877 deodorizing effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 20
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 239000000523 sample Substances 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 8
- 230000009477 glass transition Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 6
- 229920000098 polyolefin Polymers 0.000 description 6
- 239000005060 rubber Substances 0.000 description 6
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 5
- 229920005996 polystyrene-poly(ethylene-butylene)-polystyrene Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920006132 styrene block copolymer Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000001932 seasonal effect Effects 0.000 description 3
- 229920013640 amorphous poly alpha olefin Polymers 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920005638 polyethylene monopolymer Polymers 0.000 description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- HECLRDQVFMWTQS-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical group C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
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- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- C09J157/00—Adhesives based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09J157/02—Copolymers of mineral oil hydrocarbons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a hot melt adhesive for cutting paper diapers S and a preparation method thereof, wherein the hot melt adhesive is prepared from the following components in percentage by weight: 10-20 parts of polymer, 1-10 parts of low-odor solution polymerized styrene-butadiene rubber, 10-20 parts of plasticizer, 1-5 parts of antioxidant, 30-50 parts of hydrogenated petroleum resin, 5-15 parts of semi-hydrogenated petroleum resin, 5-15 parts of high-softening-point resin and 1-10 parts of poly alpha-methyl styrene resin; according to the invention, the formula of the hot melt adhesive for cutting the paper diaper S is optimized, and the prepared hot melt adhesive has a further reduced odor by adding the self-made low-odor solution polymerized styrene-butadiene rubber, so that the problem that the current sanitary products have strict odor requirements can be well solved, and the hot melt adhesive can meet the requirements of users on the odor while meeting the performances of the hot melt adhesive when being applied to the paper diaper for infants; in addition, the initial adhesiveness and the opening time of the hot melt adhesive for cutting the diaper S, which are obtained by the invention, are obviously improved, and meanwhile, the cutting performance is better, and the holding adhesiveness, the peeling strength and the like are obviously improved.
Description
Technical Field
The invention relates to a hot melt adhesive technology, in particular to a hot melt adhesive for cutting paper diapers S and a preparation method thereof.
Background
In the aspect of infant products, as the diaper has stronger moisture absorption capability, the diaper is used by most families, and the diaper has a trend of gradually replacing the traditional diaper, meanwhile, along with the continuous innovation of technology and the pursuing of efficiency, cost and product beauty and comfortableness of manufacturers, the left and right patches on the traditional diaper are gradually replaced by S-cuts on the diaper, more left and right patches of hot melt adhesives on the market adopt rosin resin at the present stage, the odor is heavier, and the use experience of consumers is influenced; as the user is an infant, the smell system of the infant is tender and weak, and if the smell of the diaper is heavy, the infant is easy to be uncomfortable, so that compared with an adult diaper, the infant diaper has more strict requirements on the smell of sanitary products; in addition, because S on the panty-shape diapers cuts and compounds on the panty-shape diapers line, directly scrape on the panty-shape diapers production line on substrates such as non-woven fabrics, diamond film, magic knot, require that the gluey temperature can not be too high, the too high substrate that can scald, melt adhesive rate can not be too slow simultaneously, otherwise just start the preceding time zone and follow production line speed, influence production quality and efficiency, secondly, S cuts and compounds with the hot melt adhesive on line, it requires that the online open time just can, the panty-shape diapers do not receive weather resistance in the follow-up use.
The left and right stickers on the diaper are not compounded on the diaper line, the left and right stickers are coated on base materials such as PP stickers and the like by a left and right sticker factory, the left and right stickers are used for the diaper, a terminal customer buys the type of diaper, the front waist sticker of the diaper is stuck by the left and right stickers when in use, the application requires good weather resistance of the left and right stickers (such as good initial adhesion when the temperature is 0 DEG in winter, better front waist stickers can be stuck, good application performance and the like, the viscosity is generally higher, the operation temperature is high when in application, the traditional left and right stickers cannot be used for S cutting, and the problems of poor adhesive effect, poor holding time, insufficient opening time in winter and the like are also caused by structural adhesive or rubber used for the diaper, so that the low-odor and high-performance hot melt adhesive suitable for S cutting of the diaper for infants needs to be continuously developed.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide the hot melt adhesive for cutting the diaper S, the odor of the prepared hot melt adhesive is greatly reduced by optimizing the formula of the hot melt adhesive, the problem that the current sanitary products have strict odor requirements can be well solved, the initial viscosity and the opening time of the obtained hot melt adhesive for cutting the diaper S are obviously improved, and meanwhile, the cutting performance is relatively good.
One of the purposes of the invention is realized by adopting the following scheme: the hot melt adhesive for cutting the paper diaper S is prepared from the following components in percentage by weight: 10-20 parts of polymer, 1-10 parts of low-odor solution polymerized styrene-butadiene rubber, 10-20 parts of plasticizer, 1-5 parts of antioxidant, 30-50 parts of hydrogenated petroleum resin, 5-15 parts of semi-hydrogenated petroleum resin, 5-15 parts of high-softening-point resin and 1-10 parts of poly alpha-methyl styrene resin.
As a further explanation of the above scheme, the hot melt adhesive for cutting paper diapers S is prepared from the following components in percentage by weight: 19 parts of polymer, 7 parts of low-odor solution polymerized styrene-butadiene rubber, 15 parts of plasticizer, 1 part of antioxidant, 32 parts of hydrogenated petroleum resin, 10 parts of semi-hydrogenated petroleum resin, 10 parts of high-softening point resin and 6 parts of poly alpha-methyl styrene resin.
As a further illustration of the above scheme, the semi-hydrogenated petroleum resin is a semi-hydrogenated petroleum resin with model number of C-100R from Izeman chemical company; the hydrogenated petroleum resin is DCPD petroleum resin with the brand number of 5100 of Shandong, ruisen Petroleum Co.
As a further illustration of the above scheme, the high softening point resin is a C5 petroleum resin with a softening point of 120-130 ℃.
As a further illustration of the above scheme, the high softening point resin is a high softening point resin of model C-125W from Izeman chemical company, and the softening point temperature is 125 ℃.
As a further explanation of the above scheme, the low odor solution polymerized styrene-butadiene rubber is prepared from solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant, and comprises the following steps:
kneading: confirming that the kneader is cleaned, opening a kneader switch to heat, adding solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant into the kneader in proportion when the temperature is raised to 120+/-5 ℃, heating and stirring, vacuumizing for 20 minutes after the solution polymerized styrene-butadiene rubber is completely melted, discharging and preparing into a sheet shape;
deodorizing: and (3) placing the prepared sheet sample into a storage tank with a blowing heating function, controlling the heating temperature to be 50-70 ℃, spraying 400-800mL of deionized water on the sheet sample every 20min, drying the material for 2-4 hours to remove odor, and finally stopping heating and cooling to room temperature to obtain the low-odor solution polymerized styrene-butadiene rubber.
As a further illustration of the above scheme, the ratio of solution polymerized styrene-butadiene rubber, naphthenic oil, antioxidant, deodorant in the kneading step is 60:38:1:1.
as a further illustration of the above scheme, the polymer is one or a mixture of two or more of hydrogenated styrene-butadiene block copolymer (SEBS), maleic anhydride modified hydrogenated styrene-butadiene block copolymer, styrene-butadiene-butylene-styrene block copolymer (SBBS), styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer (SIS), polyolefin, amorphous poly-alpha-olefin, polyethylene homo/copolymer, polypropylene homo/copolymer or ethylene-vinyl acetate.
As a further illustration of the above scheme, the styrene-isoprene-styrene block copolymer has a styrene content of 5% to 60% and a diblock content of 20% to 80%; the maleic anhydride modified hydrogenated styrene-butadiene block copolymer has a styrene content of 10% to 60%; the diblock content is 20% -80%; the styrene-butadiene-butylene-styrene block copolymer has a styrene content of 10-50% and a diblock content of 20-50%; the styrene-butadiene-styrene block copolymer has a styrene content of 10-50% and a diblock content of 20-40%; the styrene-butadiene-styrene block copolymer has a styrene content of 5-60% and a diblock content of 20-80%.
As a further illustration of the above scheme, the styrene-isoprene-styrene block copolymers include SIS 1220 and SIS 1250L, S1SYH-1125 and SIS YH-1126, of Baling petrochemicals, shandong, st. Technology Co., ltd; the styrene-butadiene-styrene block copolymer included SBS 3545 of the state Li Changrong rubber limited company.
As a further illustration of the above scheme, the polyolefin is one of a maleic anhydride modified metallocene polyolefin and POE.
As a further illustration of the above scheme, the plasticizer is a naphthenic oil manufactured by Xinjiang Clamamari company under the model 47135; the antioxidant is an antioxidant with the model number of 1010 manufactured by Basoff company.
The second purpose of the invention is realized by adopting the following technical scheme: a preparation method of a hot melt adhesive for cutting paper diapers S comprises the following steps:
s1: confirming that a reaction kettle bottom valve is closed, opening steam heating, starting a stirring paddle, and adding a plasticizer, poly alpha-methyl styrene resin and an antioxidant;
s2: heating the reaction kettle of the S1 to 150-165 ℃, adding the polymer and the low-odor solution polymerized styrene-butadiene rubber, and stirring until the mixture is melted;
s3: uniformly adding hydrogenated petroleum resin, semi-hydrogenated petroleum resin and high softening point resin into the reaction kettle of the step S2, and fully reacting after the hydrogenated petroleum resin, the semi-hydrogenated petroleum resin and the high softening point resin are completely melted;
s4: after the reaction in the step S3 is completed, vacuumizing the molten material in the reaction kettle to remove bubbles;
s5: sequentially passing the molten material vacuumized in the step S4 through a cooling system and a drying system, and finally packaging; the hot melt adhesive for cutting the diaper S is obtained.
As a further explanation of the above scheme, in S4, the pressure of the vacuum is 008 Pa to 0.1Pa.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the formula of the hot melt adhesive for cutting the paper diaper S is optimized, and the prepared hot melt adhesive has a further reduced odor by adding the self-made low-odor solution polymerized styrene-butadiene rubber, so that the problem that the current sanitary products have strict odor requirements can be well solved, and the hot melt adhesive can meet the requirements of users on the odor while meeting the performances of the hot melt adhesive when being applied to the paper diaper for infants;
2. the hot melt adhesive is mainly prepared from polymer, poly alpha-methyl styrene resin, antioxidant, plasticizer and high softening point resin which are matched with pretreated low-odor poly solution styrene butadiene rubber, and has excellent holding power and stripping power; the initial viscosity and the opening time of the obtained hot melt adhesive for cutting the diaper S are obviously improved, and meanwhile, the cutting performance is relatively good;
3. the invention uses poly alpha-methyl styrene resin and high softening point resin, and the obtained hot melt adhesive for cutting the diaper S has obviously improved holding viscosity;
4. the C5 semi-hydrogenated petroleum resin with light smell is added, and firstly, the compatibility of the C5 semi-hydrogenated petroleum resin with the polymer styrene-isoprene-styrene segmented copolymer is good; secondly, the adhesive force is strong; meanwhile, the stability of the diaper S-cut hot melt adhesive to seasonal variation is good, and the peeling strength of the obtained diaper S-cut hot melt adhesive is obviously improved.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified.
The hot melt adhesive for cutting the paper diaper S is prepared from the following components in percentage by weight: 10-20 parts of polymer, 1-10 parts of low-odor solution polymerized styrene-butadiene rubber, 10-20 parts of plasticizer, 1-5 parts of antioxidant, 30-50 parts of hydrogenated petroleum resin, 5-15 parts of semi-hydrogenated petroleum resin, 5-15 parts of high-softening-point resin and 1-10 parts of poly alpha-methyl styrene resin.
As a further preferred embodiment, the hot melt adhesive for cutting the paper diaper S is prepared from the following components in percentage by weight: 19 parts of polymer, 7 parts of low-odor solution polymerized styrene-butadiene rubber, 15 parts of plasticizer, 1 part of antioxidant, 32 parts of hydrogenated petroleum resin, 10 parts of semi-hydrogenated petroleum resin, 10 parts of high-softening point resin and 6 parts of poly alpha-methyl styrene resin.
As a further preferred embodiment, the semi-hydrogenated petroleum resin is a semi-hydrogenated petroleum resin of model C-100R from the company Isman chemical company.
As a further preferred embodiment, the high softening point resin is a C5 petroleum resin having a softening point of 120-130 ℃.
As a further preferred embodiment, the high softening point resin is a high softening point resin of model C-125W from Izeman chemical company, and the softening point temperature is 125 ℃.
As a further preferred embodiment, the low odor solution polymerized styrene-butadiene rubber is prepared from solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant, and comprises the following steps:
kneading: confirming that the kneader is cleaned, opening a kneader switch to heat, adding solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant into the kneader in proportion when the temperature is raised to 120+/-5 ℃, heating and stirring, vacuumizing for 20 minutes after the solution polymerized styrene-butadiene rubber is completely melted, discharging and preparing into a sheet shape;
deodorizing: and (3) placing the prepared sheet sample into a storage tank with a blowing heating function, controlling the heating temperature to be 50-70 ℃, spraying 400-800mL of deionized water on the sheet sample every 20min, drying the material for 2-4 hours to remove odor, and finally stopping heating and cooling to room temperature to obtain the low-odor solution polymerized styrene-butadiene rubber.
As a further preferred embodiment, the ratio of the solution polymerized styrene-butadiene rubber, the naphthenic oil, the antioxidant, the deodorant in the kneading step is 60:38:1:1.
as a further preferred embodiment, the polymer is one or a mixture of two or more of hydrogenated styrene-butadiene block copolymer (SEBS), maleic anhydride modified hydrogenated styrene-butadiene block copolymer, styrene-butadiene-butylene-styrene block copolymer (SBBS), styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer (SIS), polyolefin, amorphous poly-alpha-olefin, polyethylene homo/copolymer, polypropylene homo/copolymer or ethylene-vinyl acetate.
As a further preferred embodiment, the styrene-isoprene-styrene block copolymer has a styrene content of 5% to 60%, a diblock content of 20% to 80%, and the maleic anhydride modified hydrogenated styrene-butadiene block copolymer has a styrene content of 10% to 60%; the diblock content is 20% -80%; the styrene-butadiene-butylene-styrene block copolymer has a styrene content of 10-50% and a diblock content of 20-50%; the styrene-butadiene-styrene block copolymer has a styrene content of 10-50% and a diblock content of 20-40%; the styrene-butadiene-styrene block copolymer has a styrene content of 5-60% and a diblock content of 20-80%.
As a further preferred embodiment, the styrene-isoprene-styrene block copolymer has a styrene content of 5% to 60% and a diblock content of 20% to 80%.
As a further preferred embodiment, the styrene-isoprene-styrene block copolymer includes SIS 1220 and SIS 1250L, san francisco, S1SYH-1125 and SIS YH-1126, of the middle petrochemical baling petrochemical company; the styrene-butadiene-styrene block copolymer included SBS 3545 of the state Li Changrong rubber limited company.
As a further preferred embodiment, the polyolefin is one of a maleic anhydride modified metallocene polyolefin, POE.
As a further preferred embodiment, the plasticizer is a naphthenic oil of model 47135 produced by Xinjiang Clamamari company; the antioxidant is an antioxidant with the model number of 1010 manufactured by Basoff company.
The invention also provides a preparation method of the hot melt adhesive for cutting the paper diaper S, which comprises the following steps:
s1: confirming that a reaction kettle bottom valve is closed, opening steam heating, starting a stirring paddle, and adding a plasticizer, poly alpha-methyl styrene resin and an antioxidant;
s2: heating the reaction kettle of the S1 to 150-165 ℃, adding the polymer and the low-odor solution polymerized styrene-butadiene rubber, and stirring until the mixture is melted;
s3: uniformly adding hydrogenated petroleum resin, semi-hydrogenated petroleum resin and high softening point resin into the reaction kettle of the step S2, and fully reacting after the hydrogenated petroleum resin, the semi-hydrogenated petroleum resin and the high softening point resin are completely melted;
s4: after the reaction in the step S3 is completed, vacuumizing the molten material in the reaction kettle to remove bubbles;
s5: sequentially passing the molten material vacuumized in the step S4 through a cooling system and a drying system, and finally packaging; the hot melt adhesive for cutting the diaper S is obtained.
As a further preferable embodiment, in the step S4, the pressure of the vacuum is 008 Pa to 0.1Pa.
Recipe analysis:
the polymer in the formula of the invention is selected from styrene-isoprene-styrene (SIS), styrene-butadiene-styrene (SBS) or hydrogenated styrene-ethylene/butylene-styrene (SEBS), and has the function that the high tensile strength polymer can endow the hot melt adhesive with excellent adhesive holding force, and when the system polymer is increased, the initial adhesive force and the adhesive holding force of the hot melt adhesive can be properly improved. The invention is preferably a high diblock polymer because the high diblock polymer has the characteristics of good initial adhesion, good low temperature resistance and the like.
The low-odor solution polymerized styrene-butadiene rubber is prepared by mixing solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant according to the proportion of 60:38:1:1, adding the mixture into a kneader for heating and stirring, discharging after complete melting to prepare sheets, then placing the prepared sheet sample into a storage tank with a blowing and heating function, controlling the heating temperature to be 50-70 ℃, spraying 400-800mL of deionized water on the sheet sample every 20min, performing material drying and odor removal for 2-4 hours, and finally stopping heating and cooling to room temperature;
according to research, the solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant are prepared according to the proportion, the prepared low-odor solution polymerized styrene-butadiene rubber has low odor, meets the requirements of sanitary products on odor, and has the characteristics of good stability, good affinity to a base material, good slitting performance and the like, and the repeated pasting performance is facilitated after the solution polymerized styrene-butadiene rubber is added; in addition, the amount of the low-odor solution polymerized styrene-butadiene rubber cannot be too high, the viscosity is influenced by the too high amount, the dissolving speed is further influenced, and the primary viscosity, the affinity and the like are influenced by the too low amount; multiple experiments show that when the dosage of the low-odor solution polymerized styrene-butadiene rubber is 7 parts, the prepared hot melt adhesive has optimal initial adhesion performance and affinity.
In the deodorizing process, the heating temperature is controlled to be 50-70 ℃ because the odor is removed by baking the material for 2-4 hours, the appearance and the thermal stability of the material can be influenced under the condition of too high temperature for a long time, and the volatilization of small molecular substances of the material is not facilitated due to too low temperature;
in addition, the sample is subjected to water spraying and air blowing drying treatment, part of residual micromolecular substances in the material are carried away and volatilized by air, and the rest of the micromolecular substances are adsorbed or neutralized by the deodorant after being released, so that the smell of the sample material is not reduced.
The naphthenic oil in the formula is one of petroleum rubber oil, and has the advantages of good affinity, little pollution or no pollution, and plays a role in softening. The invention is preferably naphthenic oil with model 47135 produced by Xinjiang Clarityi company, in addition, the dosage of the naphthenic oil is preferably between 10-20 parts, and the naphthenic oil is matched with the selected polymer of the invention, so that the colloid can keep proper stripping force and initial adhesion, and if the dosage is too high, the stripping force and initial adhesion of the hot melt adhesive can be reduced; too small amount can cause too high viscosity of the hot melt adhesive, which is unfavorable for processing.
The glass transition temperature is affected by the consumption of the polymer and the naphthenic oil, the consumption of the polymer and the naphthenic oil is increased, the glass transition temperature is reduced, but the consumption of the naphthenic oil is excessive, the cohesion, the initial adhesion, the peel strength and the persistent adhesion of the product are all affected, the consumption of the naphthenic oil is too low, the viscosity of the product is higher, and the glass transition temperature is also affected; the polymer is too much, the viscosity of the product is higher, the polymer is too little, the glass transition temperature is higher, and the cohesion, the initial adhesion, the peel strength and the holding adhesion are also affected, so the proportion of the two components affects the glass transition temperature, the cohesion, the initial adhesion, the peel strength and the holding adhesion together.
The poly alpha-methyl styrene resin in the formula can improve the viscosity maintenance performance of the hot melt adhesive at high temperature, and the tackifying resin can endow the hot melt adhesive with higher stripping force; the component of the poly alpha-methylstyrene resin cannot be too high, so that the initial adhesion performance is affected by too high and the holding adhesion performance is affected by too low; the use amount of the adhesive is 3-8 parts, and the adhesive holding performance and the peeling force are optimal.
The antioxidant in the formula can prevent the oxidation of the polymer, so that macromolecular chains are broken, crosslinked and the performance is deteriorated.
The high softening point resin in the formula of the invention is preferably petroleum resin with high softening point, thereby further improving the mechanical property of the hot melt adhesive. The softening point of petroleum resin has a great influence on the holding strength of the hot melt adhesive. The higher the softening point of the resin is, the stronger the cohesive strength of the resin is, the higher the adhesive holding strength of the adhesive is, the higher the use temperature of the hot melt adhesive is, and the wider the application range is; however, too high a softening point may increase the melt viscosity of the resin, reduce the wetting ability of the hot melt adhesive, and adversely affect the adhesion of the hot melt adhesive. It was found by research that the effect was optimal when the softening point was in the range of 120-130 ℃.
The invention adopts the C5 semi-hydrogenated petroleum resin with light smell, firstly, the compatibility with the polymer styrene-isoprene-styrene segmented copolymer is good, secondly, the adhesive force is strong, meanwhile, the stability to seasonal change is better, and the peeling strength of the obtained hot melt adhesive for cutting the diaper S is obviously improved. Repeated experiments show that when the dosage ratio of the polymer styrene-isoprene-styrene block copolymer to the C5 semi-hydrogenated petroleum resin is about 2:1, the obtained hot melt adhesive for cutting the diaper S has optimal peeling strength and best stability to seasonal changes.
The hot melt adhesive is mainly prepared from polymer, poly alpha-methyl styrene resin, antioxidant, plasticizer and high softening point resin which are matched with the pretreated low-odor poly-solution styrene-butadiene rubber, so that the prepared hot melt adhesive has excellent holding power and stripping power, the initial adhesion performance of the hot melt adhesive can be improved by adopting high diblock polymer for compounding, the initial adhesion and the opening time of the obtained hot melt adhesive for cutting the diaper S are obviously improved by blending the polymer and the solution poly-styrene-butadiene rubber, and meanwhile, the cutting performance is relatively good.
The hot melt adhesive for cutting paper diapers S prepared by the present invention is described in the following specific examples. The raw materials, equipment, etc. used in the following examples are available in a purchase manner except for special restrictions.
Examples 1-5 and comparative examples 1-6:
the raw materials were weighed according to the proportions shown in Table 1, and the products were prepared according to the procedures shown in examples 1 to 5, specifically shown in Table 1:
TABLE 1 raw material ratios of examples 1-5 and comparative examples 1-6
Wherein, the styrene content of the polymer SIS 1220 of the above table 1 is 25% and the diblock content is 25%; styrene content of SIS 1250L is 14-18%, diblock content is 47-53%; the styrene content of SBS 3545 was 45% and the diblock content was 63%.
Unless otherwise specified, the materials used were consistent in order to demonstrate comparability of the test effects.
Taking example 2 as an example, comparative example 1 is different in that solution polymerized styrene-butadiene rubber is used, and low-odor solution polymerized styrene-butadiene rubber is not added; comparative example 2 is different in the amounts of hydrogenated petroleum resin and semi-hydrogenated petroleum resin; comparative example 3 was different in the amount of the polymer used and the low-odor solution polymerized styrene-butadiene rubber was not added; comparative example 4 was different in the amount of the semi-hydrogenated petroleum resin and was not added with the poly alpha-methylstyrene resin; comparative example 5 was different in that the amounts of hydrogenated petroleum resin were different, and no semi-hydrogenated petroleum resin was added.
The preparation method of the hot melt adhesive for cutting the paper diaper S comprises the following steps:
s1: confirming that a reaction kettle bottom valve is closed, opening steam heating, starting a stirring paddle, and adding a plasticizer, poly alpha-methyl styrene resin and an antioxidant;
s2: heating the reaction kettle of the S1 to 150-165 ℃, adding the polymer and the low-odor solution polymerized styrene-butadiene rubber, and stirring until the mixture is melted;
s3: uniformly adding hydrogenated petroleum resin, semi-hydrogenated petroleum resin and high softening point resin into the reaction kettle of the step S2, and fully reacting after the hydrogenated petroleum resin, the semi-hydrogenated petroleum resin and the high softening point resin are completely melted;
s4: after the reaction in the step S3 is completed, vacuumizing the molten material in the reaction kettle to remove bubbles;
s5: sequentially passing the molten material vacuumized in the step S4 through a cooling system and a drying system, and finally packaging; the hot melt adhesive for cutting the diaper S is obtained.
Effect evaluation and Performance detection
The hot melt adhesives of examples 1-5 and comparative examples 1-6 were tested for performance and the test items and results are shown in tables 2-3.
The detection method comprises the following steps:
the panty diaper S obtained in examples 1 to 5 and comparative examples 1 to 6 was cut with a hot melt adhesive and uniformly sized on 60g of PET which is conventionally used by a direct coating method, and the sizing thickness was 30.+ -.1 g/m2. The ring-shaped primary adhesion and peel strength properties of the hot melt adhesive for cutting diaper S were tested at an indoor temperature of 23.+ -. 2 ℃ and a relative humidity of 45.+ -. 10%.
1. Peel strength and loop tack
The peel strength was tested according to the specifications of the national standard GB/T2792-2014 and the loop tack was tested according to the specifications of the national standard GB/T31125-2014.
2. Time to tack test
The holding time is that a coated sample with the width of 1inch is cut longitudinally, the sample is stuck on a non-woven fabric, the sample is rolled back and forth by a roller with the width of 2kg, one end of the pressed sample is fixed, a weight with the width of 1kg is hung on the other end, then the sample is hung in a baking oven with the temperature of 40 ℃, timing is started, and the dropping time of the weight is recorded.
3. Glass transition temperature test
The test was performed using a DHR rheometer, using a 25mm jig, 1g of the hot melt adhesive sample was placed on the jig, and then temperature scanned to obtain the rheometric curve. The glass transition temperature of the hot melt adhesive can be seen in the curve of temperature and loss factor.
The test results of the above test items are shown in table 2:
table 2: hot melt adhesive test data summary tables of examples 1 to 5 and comparative examples 1 to 6
Wherein, taking example 2 as an example according to the data shown in the table above, the solution polymerized styrene-butadiene rubber is adopted to replace the low-odor solution polymerized styrene-butadiene rubber in comparative example 1, and the prepared hot melt adhesive for cutting the paper diaper S has heavy odor and can not meet the odor requirement of sanitary products; comparative example 4 since the poly alpha-methylstyrene resin was not added, the holding power of the hot melt adhesive prepared was greatly reduced, and the holding power time was only 60% of that of example 2; further illustrates that the poly alpha-methyl styrene resin can improve the viscosity maintenance performance of the hot melt adhesive at high temperature; comparative example 5 since the semi-hydrogenated petroleum resin was not added and the addition amount of the petroleum resin was greater than that of the petroleum resin of example 2, the prepared hot melt adhesive had a large difference between the peel strength and the annular initial adhesion property from the hot melt adhesive prepared in example 2, indicating that the formulation design of the present invention was more reasonable and the prepared hot melt adhesive had excellent mechanical properties.
According to the invention, the formula of the hot melt adhesive for cutting the paper diaper S is optimized, and the prepared hot melt adhesive has a further reduced odor by adding the self-made low-odor solution polymerized styrene-butadiene rubber, so that the problem that the current sanitary products have strict odor requirements can be well solved, and the hot melt adhesive can meet the requirements of users on the odor while meeting the performances of the hot melt adhesive when being applied to the paper diaper for infants; the initial viscosity and the opening time of the obtained hot melt adhesive for cutting the diaper S are obviously improved by blending the polymer and the solution polymerized styrene-butadiene rubber, and meanwhile, the cutting performance is relatively good; the obtained hot melt adhesive for cutting the diaper S has obviously improved holding viscosity by using the poly alpha-methyl styrene resin and the high softening point resin.
Table 3: performance comparison table of hot melt adhesives of the invention and conventional hot melt adhesives of the same type
Wherein the conventional type 1 is common conventional rubber band, and the conventional type 2 and the conventional type 3 are common conventional structural rubber in the market;
taking example 2 as an example, conventional type 1 is different in that a poly alpha-methylstyrene resin, solution polymerized styrene-butadiene rubber, is not used.
Taking example 2 as an example, the conventional type 2 is different from the conventional type 3 in that the poly alpha-methylstyrene resin, the high softening point resin, the solution polymerized styrene-butadiene rubber are not used.
As shown in the table 3, the peel strength of the paper diaper S-cut hot melt adhesive prepared by the invention is more than 35N/inch, the annular primary adhesion is more than 36N/inch, and the adhesive holding time at 40 ℃ is more than 30min, so that the paper diaper S-cut hot melt adhesive has excellent peel, primary adhesion and adhesive holding performance. The invention can be seen that the reasonable selection and proportion of the raw material components, especially the dosage ratio of poly alpha-methyl styrene resin, low odor solution polymerized styrene-butadiene rubber, naphthenic oil and polymer is controlled, so as to generate synergistic interaction between the components, and finally the invention has excellent stripping, initial adhesion and lasting adhesion performances. And the conventional types 1-3 do not use poly alpha-methyl styrene resin, high softening point resin and solution polymerized styrene-butadiene rubber, so that the prepared hot melt adhesive has poorer annular initial viscosity and holding viscosity performance compared with the hot melt adhesive prepared by the scheme.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (5)
1. The hot melt adhesive for cutting the paper diaper S is characterized by being prepared from the following components in percentage by weight: 10-20 parts of polymer, 1-10 parts of low-odor solution polymerized styrene-butadiene rubber, 10-20 parts of plasticizer, 1-5 parts of antioxidant, 30-50 parts of hydrogenated petroleum resin, 5-15 parts of semi-hydrogenated petroleum resin, 5-15 parts of high-softening-point resin and 1-10 parts of poly alpha-methyl styrene resin;
the polymer is a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer; the styrene-isoprene-styrene block copolymer has a styrene content of 5-60% and a diblock content of 20-80%; the styrene-butadiene-styrene block copolymer has a styrene content of 5-60% and a diblock content of 20-80%;
the low-odor solution polymerized styrene-butadiene rubber is prepared from solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant, and comprises the following steps:
kneading: confirming that the kneader is cleaned, opening a kneader switch to heat, adding solution polymerized styrene-butadiene rubber, naphthenic oil, an antioxidant and a deodorant into the kneader in proportion when the temperature is raised to 120+/-5 ℃, heating and stirring, vacuumizing for 20 minutes after the solution polymerized styrene-butadiene rubber is completely melted, discharging and preparing into a sheet shape;
deodorizing: putting the prepared sheet sample into a storage tank with a blowing heating function, controlling the heating temperature to be 50-70 ℃, spraying 400-800mL of deionized water on the sheet sample every 20min, drying the material for 2-4 hours to remove odor, and finally stopping heating and cooling to room temperature to obtain low-odor solution polymerized styrene-butadiene rubber;
the proportion of the solution polymerized styrene-butadiene rubber, the naphthenic oil, the antioxidant and the deodorant in the kneading step is 60:38:1:1.
2. the hot melt adhesive for cutting paper diapers S according to claim 1, which is characterized by comprising the following components in percentage by weight: 19 parts of polymer, 7 parts of low-odor solution polymerized styrene-butadiene rubber, 15 parts of plasticizer, 1 part of antioxidant, 32 parts of hydrogenated petroleum resin, 10 parts of semi-hydrogenated petroleum resin, 10 parts of high-softening point resin and 6 parts of poly alpha-methyl styrene resin.
3. The hot melt adhesive for paper diaper S cutting according to claim 1, wherein the high softening point resin is C5 petroleum resin having a softening point of 120 to 130 ℃.
4. The hot melt adhesive for diaper S cutting according to claim 1, wherein the plasticizer is a naphthenic oil of model 47135 manufactured by carama company, singapore; the antioxidant is an antioxidant with the model number of 1010 manufactured by Basoff company.
5. A method for preparing a hot melt adhesive for cutting a diaper S according to any one of claims 1 to 4, comprising the steps of:
s1: confirming that a reaction kettle bottom valve is closed, opening steam heating, starting a stirring paddle, and adding a plasticizer, poly alpha-methyl styrene resin and an antioxidant;
s2: heating the reaction kettle of the S1 to 150-165 ℃, adding the polymer and the low-odor solution polymerized styrene-butadiene rubber, and stirring until the mixture is melted;
s3: uniformly adding hydrogenated petroleum resin, semi-hydrogenated petroleum resin and high softening point resin into the reaction kettle of the step S2, and fully reacting after the hydrogenated petroleum resin, the semi-hydrogenated petroleum resin and the high softening point resin are completely melted;
s4: after the reaction in the step S3 is completed, vacuumizing the molten material in the reaction kettle to remove bubbles;
s5: sequentially passing the molten material vacuumized in the step S4 through a cooling system and a drying system, and finally packaging; and obtaining the hot melt adhesive for cutting the paper diaper S.
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| CN115838578B (en) * | 2022-10-14 | 2024-04-19 | 江苏嘉好热熔胶股份有限公司 | Wet strength structural adhesive for disposable sanitary products and preparation method thereof |
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| CN103184021A (en) * | 2011-12-31 | 2013-07-03 | 曹志先 | Rubber product adhesive and manufacturing method |
| CN111849397A (en) * | 2020-07-23 | 2020-10-30 | 佛山南宝高盛高新材料有限公司 | Hot melt adhesive for difficult-to-stick base material and preparation method thereof |
| CN113388348A (en) * | 2021-06-30 | 2021-09-14 | 佛山南宝高盛高新材料有限公司 | High-performance left-right adhesive hot melt adhesive and preparation method thereof |
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| CN103184021A (en) * | 2011-12-31 | 2013-07-03 | 曹志先 | Rubber product adhesive and manufacturing method |
| CN111849397A (en) * | 2020-07-23 | 2020-10-30 | 佛山南宝高盛高新材料有限公司 | Hot melt adhesive for difficult-to-stick base material and preparation method thereof |
| CN113388348A (en) * | 2021-06-30 | 2021-09-14 | 佛山南宝高盛高新材料有限公司 | High-performance left-right adhesive hot melt adhesive and preparation method thereof |
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