CN113249059A - End sealing hot melt adhesive without surface viscosity at 40 ℃ for sanitary materials and preparation method thereof - Google Patents
End sealing hot melt adhesive without surface viscosity at 40 ℃ for sanitary materials and preparation method thereof Download PDFInfo
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- CN113249059A CN113249059A CN202110745246.1A CN202110745246A CN113249059A CN 113249059 A CN113249059 A CN 113249059A CN 202110745246 A CN202110745246 A CN 202110745246A CN 113249059 A CN113249059 A CN 113249059A
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- 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
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/12—Polypropene
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- 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
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- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
Abstract
The invention discloses an end sealing hot melt adhesive for a sanitary material without surface viscosity at 40 ℃ and a preparation method thereof, wherein the end sealing hot melt adhesive for the sanitary material is prepared from the following components in parts by weight: 0-20 parts of a plasticizer; 0.2-2 parts of antioxidant; 10-30 parts of a styrene-isoprene-styrene block copolymer; 10-40 parts of polyolefin copolymer; 10-60 parts of tackifying resin; 1-10 parts of wax; 0.1-2 parts of ultraviolet absorbent. The end sealing hot melt adhesive for the sanitary materials, which is prepared by the invention, not only has unique performance of no surface viscosity at 40 ℃ in a high-temperature environment relative to a human body, but also has strong peel strength, can meet the bonding among various base materials and has good performance.
Description
Technical Field
The invention relates to a hot melt adhesive technology, in particular to an end sealing hot melt adhesive for a sanitary material without surface viscosity at 40 ℃ and a preparation method thereof.
Background
The end sealing hot melt adhesive for the sanitary materials is mainly applied to the non-woven fabric bonding industry, wherein the most important application is in sanitary products such as baby diapers, pull-ups, adult diapers, sanitary towels and protection pads. For the sanitary product, the end sealing hot melt adhesive is mainly used for adhering leakproof end seals, edge seals of sanitary towels and the like of the diaper. Therefore, the end sealing hot melt adhesive for sanitary materials is often required to have the performances of strong peeling strength, adaptability to bonding of various different base materials, low surface viscosity and the like.
At present, the existing end sealing hot melt adhesive for sanitary materials has certain pressure sensitivity, and even pressure-sensitive structural adhesive is directly used for adhering the leakproof end seal and the edge seal of the paper diaper in the existing production process. Because the existing pressure-sensitive adhesive has stronger surface initial viscosity, and the end sealing hot melt adhesive is mainly used for adhering leakproof end seals, edge seals of sanitary towels and the like of diapers, the end sealing hot melt adhesive is easy to directly contact with skin to a certain extent, and particularly under the condition of insufficient adhesion, the risk of the problems of hot melt adhesion to the buttocks of infants and the like caused by the fact that the hot melt adhesive has too strong surface viscosity in the application of sanitary products such as diapers and the like exists. For example: in the application of the baby diaper, the end sealing glue for the sanitary material is mainly applied to the adhesion and the reinforcement of important stations such as the leakage-proof end seal, the edge seal and the like of the diaper, so as to prevent the leakage of urine. Accordingly, the skin of the infant is in close contact with the diaper for a considerable period of time during use of the diaper, and factors such as the change of the body temperature of the infant, the accumulation of urine, and the pulling of the infant due to activities can affect the hot melt adhesive in the diaper to different degrees. The end sealing hot melt adhesive for the sanitary materials used at present has stronger surface initial viscosity at normal temperature, so the influence is more obvious in the environment of 36-37 ℃ of a human body, the risks of sticking skin and the like are more easily generated in the use of sanitary products such as paper diapers and the like, and the end sealing hot melt adhesive is more harmful to the skin of infants.
In addition, the existing end sealing hot melt adhesive for the sanitary material has low peeling strength performance and low adaptability to various base materials.
Disclosure of Invention
The invention mainly aims at the problems that the existing end sealing hot melt adhesive for the sanitary materials has strong surface viscosity and is easy to have the risk in application, and the improvement is made on the premise of keeping the basic performance of the existing end sealing hot melt adhesive for the sanitary materials. The invention aims to provide a better technical solution, namely an end sealing hot melt adhesive for a sanitary material without surface stickiness at 40 ℃. The technical scheme provided by the invention solves the risks in production and application related to the problems from the technical source, and further ensures the application quality of various sanitary products, which is superior performance that the existing common hot melt adhesive does not have. In addition, the existing end sealing hot melt adhesive for the sanitary material has low peeling strength performance and low adaptability to various base materials. The end sealing hot melt adhesive for the 40 ℃ non-surface-adhesive sanitary material can not only have the unique performance of no surface adhesion under the high temperature environment of 40 ℃ relative to a human body, but also have stronger peel strength, can meet the bonding among various different base materials and has good performance.
The invention also aims to provide a preparation method of the end sealing hot melt adhesive for the sanitary material without surface stickiness at 40 ℃. The preparation method is simple, easy to operate and suitable for large-scale production.
One of the purposes of the invention is realized by adopting the following technical scheme: an end sealing hot melt adhesive for sanitary materials without surface viscosity at 40 ℃ consists of a plasticizer, an antioxidant, a styrene-isoprene-styrene block copolymer SIS, a polyolefin copolymer, tackifying resin, wax and an ultraviolet absorbent; the weight parts of the components are respectively as follows:
0-20 parts of a plasticizer;
0.2-2 parts of antioxidant;
10-30 parts of a styrene-isoprene-styrene block copolymer;
10-40 parts of polyolefin copolymer;
10-60 parts of tackifying resin;
1-10 parts of wax;
0.1-2 parts of ultraviolet absorbent.
Further, the end sealing hot melt adhesive for the sanitary material comprises the following components in parts by weight:
0.1-5 parts of a plasticizer;
0.2-1 part of antioxidant;
10-30 parts of a styrene-isoprene-styrene block copolymer;
10-30 parts of polyolefin copolymer;
10-60 parts of tackifying resin;
1-8 parts of wax;
0.1-1 part of ultraviolet absorbent.
Further, the plasticizer is selected from one or a mixture of more than two of naphthenic oil, white oil and phthalate plasticizer.
Further, the antioxidant is selected from one or a mixture of two of hindered phenol antioxidants and phosphite antioxidants.
Further, the styrene-isoprene-styrene block copolymer is a styrene-isoprene-styrene block copolymer having a styrene content of 10% or more and a diblock content of 10% or more.
Further, the polyolefin copolymer is one or a mixture of more than two of polyethylene copolymer, polypropylene copolymer, polyoctene copolymer or binary and multi-element copolymer thereof.
Further, the tackifying resin is selected from one or a mixture of more than two of petroleum resin, rosin resin and terpene resin.
Further, the wax is selected from paraffin wax, polyolefin wax, amide wax, Fischer-Tropsch wax, microcrystalline wax, and EVA wax, or a mixture of two or more thereof.
Further, the ultraviolet absorbent is one or a mixture of more than two of UV-P and UV-326H.
The second purpose of the invention is realized by adopting the following technical scheme: a preparation method of an end sealing hot melt adhesive for a sanitary material without surface viscosity at 40 ℃ is characterized by comprising the following steps:
1) adding a plasticizer and an antioxidant into a kneader, and heating to 120 +/-5 ℃;
2) adding styrene-isoprene-styrene block copolymer, adjusting the rotation speed of a kneader to 30 revolutions, and stirring at a constant speed;
3) after the mixed system is stirred to a molten state, adding the polyolefin copolymer, and continuously and uniformly stirring;
4) after the polyolefin copolymer added in the step 3) is stirred to a molten state, adding tackifying resin, and continuing stirring;
5) after the tackifying resin added in the step 4) is stirred to a molten state, sequentially adding the wax and the ultraviolet absorbent, and continuing stirring;
6) after the step 5) is finished and stirring is continued for 5 minutes, a vacuum pump is opened to vacuumize and remove bubbles, uniform stirring is continuously kept during vacuumizing, and the rotating speed of the kneader is kept at 25-35 revolutions; the stirring vacuum degree is maintained between 0.8MPa and 1 MPa; the material temperature is maintained at 125-145 ℃;
7) and finishing the timing of the step 6), uniformly stirring for 40 minutes, stopping stirring, stopping vacuum, stopping heating, discharging, and cooling to room temperature to obtain the end sealing hot melt adhesive without surface viscosity at 40 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) the hot melt adhesive prepared by the invention has the technical effect that the surface of the hot melt adhesive is not sticky at 40 ℃, the effect can be reflected by annular initial adhesion at 40 ℃, and the test method of the annular initial adhesion is determined according to GB/T31125-2014;
(2) the hot melt adhesive prepared by the invention can adapt to the bonding of various different base materials and has higher peel strength, the technical effect is mainly reflected by the test result of the peel strength of the coated various different base materials, and the peel strength test method of the hot melt adhesive is determined according to the national standard GB/T2792-2014;
(3) the hot melt adhesive prepared by the invention has the performance, has no surface viscosity on the adhesion of the end edge seal of the sanitary products such as paper diapers and the like, can reduce the risk of skin adhesion and other problems caused by over-adhesion of the hot melt adhesive, and has the advantages of being suitable for the adhesion of various different base materials and stronger in peel strength than the common hot melt adhesive. The technical scheme provided by the invention solves the risks in production and application related to the problems from the technical source, and further ensures the application quality of various sanitary products, which is superior performance that the existing common hot melt adhesive does not have.
(4) The preparation method is simple, easy to operate and suitable for large-scale production.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
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.
An end sealing hot melt adhesive for sanitary materials without surface viscosity at 40 ℃ is characterized by consisting of a plasticizer, an antioxidant, a styrene-isoprene-styrene block copolymer SIS, a polyolefin copolymer, tackifying resin, wax and an ultraviolet absorbent; the weight parts of the components are respectively as follows:
0-20 parts of plasticizer
0.2 to 2 portions of antioxidant
10-30 parts of styrene-isoprene-styrene block copolymer
10-40 parts of polyolefin copolymer
10-60 parts of tackifying resin
1-10 parts of wax
0.1-2 parts of ultraviolet absorbent.
As a further preferred scheme, the end sealing hot melt adhesive for the sanitary materials comprises the following components in parts by weight:
0.1-5 parts of a plasticizer;
0.2-1 part of antioxidant;
10-30 parts of a styrene-isoprene-styrene block copolymer;
10-30 parts of polyolefin copolymer;
10-60 parts of tackifying resin;
1-8 parts of wax;
0.1-1 part of ultraviolet absorbent.
The end sealing hot melt adhesive for the 40 ℃ surface inviscid sanitary material can not only have the unique performance of no surface stickiness at the temperature of 40 ℃ in a high-temperature environment relative to a human body, but also have strong peeling strength, can meet the bonding among various base materials and has good performance.
The components of the invention have the following functions in the formula:
plasticizer: the plasticizer is used as a softening agent, so that the viscosity of the hot melt adhesive can be well adjusted, and the hot melt adhesive can show different flowability at different temperatures; the viscosity of the hot melt adhesive has a good guiding effect in practical production application, the lower viscosity usually shows better fluidity, and the good fluidity enables the hot melt adhesive to show the advantages of simple and convenient use, good spraying, prolonging the open time of the hot melt adhesive, enhancing the infiltration effect of the hot melt adhesive on a coated substrate and the like in use; this does not contribute to the reduction of surface tack in the composition;
antioxidant: when only a small amount of the polymer system exists, the polymer can delay or inhibit the progress of the oxidation process of the polymer, thereby preventing the aging of the polymer and prolonging the service life of the polymer;
styrene-isoprene-styrene block copolymer SIS: the thermoplastic elastomer SIS serving as one main framework in the hot melt adhesive has certain viscoelasticity and strong tensile strength, and mainly plays a role in providing certain cohesion and excellent viscoelasticity in the formula. The rubber SIS diblock with higher content used in the formula not only can provide cohesive strength, but also can form better initial adhesion and infiltration effect on a base material in the molten state, and the effect ensures that the hot melt adhesive is better attached to the base material, so that the hot melt adhesive obtains better peel strength; but is not beneficial to reducing the initial adhesion of the surface of the hot melt adhesive;
polyolefin copolymer: the polyolefin copolymer, as another polymer distinguished from the above SIS, has the characteristics of high fluidity, low molecular weight and low viscosity, and can improve processability to a certain extent; making it easier to spray. In addition, compared with SIS, the polyolefin copolymer has relatively better initial viscosity, and can provide longer open time for the hot melt adhesive in the using process, so that the hot melt adhesive has stronger infiltration effect and bonding strength for different types of base materials, which is generally shown in that the hot melt adhesive is fully contacted with the base materials after being sprayed on the base materials, the contact area of the adhesive and the base materials is increased, and the bonding capability of the adhesive and the base materials is greatly improved, and on the other hand, the polyolefin copolymer has good high temperature resistance, and simultaneously has weaker surface viscosity after being processed and formed, which plays an important role in the characteristic of no viscosity at 40 ℃.
Tackifying resin: the main function in the formula is to enhance the viscosity of the adhesive and improve the bonding strength to a base material, the component is not beneficial to reducing the initial adhesion of the adhesive surface, and tackifying resin with lower initial adhesion of the surface after molding can be preferably selected.
Wax: the components are main components for reducing initial adhesion on the surface of the adhesive, the wax has the characteristic of no surface stickiness after processing and forming, and the wax has relatively poor compatibility with other components, so a small amount of wax is separated out from the mixed components after the processing and forming of the hot melt adhesive, a thin wax layer is formed on the surface of the hot melt adhesive, and the contact of other components with strong initial adhesion with the outside is isolated to a certain extent, so that the effect of no surface stickiness is formed on the surface. However, the action of the wax is unfavorable for the properties of the hot melt adhesive for end sealing of the sanitary material, such as long opening time, strong wetting effect, high peel strength and the like, so that the wax needs to interact with other components, thereby improving the comprehensive performance of the hot melt adhesive for end sealing of the sanitary material.
Ultraviolet absorber: the light stabilizer in the formula can absorb the ultraviolet part in sunlight and a fluorescent light source without changing, thereby improving the light aging resistance of the product.
The invention mainly solves the problem that the existing end sealing hot melt adhesive for sanitary materials is easy to cause risks of skin adhesion and the like in the use of sanitary products such as paper diapers and the like due to excessively strong surface viscosity. For example: in the application of the baby diaper, the end sealing glue for the sanitary material is mainly applied to the adhesion and the reinforcement of important stations such as the leakage-proof end seal, the edge seal and the like of the diaper, so as to prevent the leakage of urine. Accordingly, the skin of the infant is in close contact with the diaper for a considerable period of time during use of the diaper, and factors such as the change of the body temperature of the infant, the accumulation of urine, and the pulling of the infant due to activities can affect the hot melt adhesive in the diaper to different degrees. The end sealing hot melt adhesive for the sanitary material used at present has stronger surface initial adhesion at normal temperature, so the influence is more obvious in the environment of 36-37 ℃ of a human body. The invention provides an end sealing hot melt adhesive for a lower surface non-adhesive sanitary material at 40 ℃ and a preparation method thereof, which can well solve the defects of the prior art and simultaneously provide a new technical solution: the non-pressure-sensitive adhesive is utilized to replace the actual application of the (polyolefin hot melt adhesive) pressure-sensitive adhesive in the traditional hot melt adhesive for the sanitary materials (TPR type hot melt adhesive for the sanitary materials), so that the application of different types of hot melt adhesives in the sanitary material products is enriched to a certain extent.
More preferably, the plasticizer is one or a mixture of two or more selected from naphthenic oil, white oil and phthalate plasticizer.
As a further preferable mode, the antioxidant is one or a mixture of two selected from hindered phenol antioxidants and phosphite antioxidants. Preferably, the antioxidant is a type 1010 antioxidant from Yuan Fushan chemical Co., Ltd or a type 168 antioxidant from Yuan Fushan chemical Co., Ltd.
More preferably, the styrene-isoprene-styrene block copolymer is a styrene-isoprene-styrene block copolymer having a styrene content of 10% or more and a diblock content of 10% or more.
More preferably, the polyolefin copolymer is one or a mixture of two or more of a polyethylene copolymer, a polypropylene copolymer, a polyoctene copolymer or a binary and multicomponent copolymer thereof. Preferably the polyolefin copolymer is a polypropylene copolymer or an APAO copolymer.
More preferably, the tackifying resin is one or a mixture of two or more selected from petroleum resin, rosin resin, and terpene resin.
Further preferably, the wax is selected from paraffin wax, polyolefin wax, amide wax, fischer-tropsch wax, microcrystalline wax, and EVA wax, or a mixture of two or more thereof.
Further preferably, the ultraviolet absorber is one or a mixture of two or more selected from the group consisting of UV-P and UV-326H.
The preparation method of the end sealing hot melt adhesive for the sanitary material without surface viscosity at 40 ℃ comprises the following steps:
1) adding a plasticizer and an antioxidant into a kneader, and heating to 120 +/-5 ℃;
2) adding styrene-isoprene-styrene block copolymer, adjusting the rotation speed of a kneader to 30 revolutions, and stirring at a constant speed;
3) after the mixed system is stirred to a molten state, adding the polyolefin copolymer, and continuously and uniformly stirring;
4) after the polyolefin copolymer added in the step 3) is stirred to a molten state, adding tackifying resin, and continuing stirring;
5) after the tackifying resin added in the step 4) is stirred to a molten state, sequentially adding the wax and the ultraviolet absorbent, and continuing stirring;
6) after the step 5) is finished and stirring is continued for 5 minutes, a vacuum pump is opened to vacuumize and remove bubbles, uniform stirring is continuously kept during vacuumizing, and the rotating speed of the kneader is kept at 25-35 revolutions; the stirring vacuum degree is maintained between 0.8MPa and 1 MPa; the material temperature is maintained at 125-145 ℃;
7) and finishing the timing of the step 6), uniformly stirring for 40 minutes, stopping stirring, stopping vacuum, stopping heating, discharging, and cooling to room temperature to obtain the end sealing hot melt adhesive without surface viscosity at 40 ℃.
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 4 and comparative examples 1 to 2
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 to 4 and comparative examples 1 to 2
Wherein, as not specifically shown in Table 1, in order to show the comparability of the test effect, the raw materials used are consistent, for example, in examples 1-4 and comparative examples 1-2, styrene-isoprene-styrene block copolymers having a styrene content of 10% or more and a diblock content of 10% or more are used; the plasticizer is naphthenic oil; the antioxidant is an oxidant prepared by mixing 1010 antioxidant and 168 antioxidant in equal proportion; the polyolefin copolymer is selected from polypropylene copolymer; the tackifying resin is terpene resin; the wax is polyolefin wax; the ultraviolet absorbent is UV-P. Comparative example 2 is a formula of an end sealing hot melt adhesive for existing sanitary materials, and the formula mainly comprises the following components: 10-30 parts of a plasticizer; 0.1-2 parts of antioxidant; 10-40 parts of thermoplastic rubber polymer (TPR); tackifying resin: 40-70 parts; in which the styrene-isoprene-styrene block copolymer of comparative example 2 was replaced with a thermoplastic rubber polymer (TPR).
The preparation method uses main tools comprising: 5L kneader, vacuum pump.
The preparation method comprises the following steps:
1) adding the above-mentioned plasticizer and antioxidant in a kneader and heating to 120 + -5 deg.C;
2) adding the styrene-isoprene-styrene block copolymer mentioned above, adjusting the rotation speed of a kneader to 30 revolutions, and stirring at a constant speed;
3) after the mixed system is stirred to a molten state, adding the polyolefin copolymer, and continuously and uniformly stirring;
4) after the polyolefin copolymer added in the step 3) is stirred to a molten state, adding the tackifying resin, and continuing stirring;
5) after the tackifying resin added in the step 4) is stirred to a molten state, sequentially adding the wax and the ultraviolet absorbent, and continuously stirring;
6) after the step 5) is finished and stirring is continued for 5 minutes, a vacuum pump is opened to vacuumize and remove bubbles, uniform stirring is continuously kept during vacuumizing, and the rotating speed of the kneader is kept at 25-35 revolutions; the stirring vacuum degree is maintained between 0.8MPa and 1 MPa; the material temperature is maintained at 125-145 ℃;
7) and finishing the timing in the step 6), uniformly stirring for 40 minutes, stopping stirring, stopping vacuum, stopping heating, discharging, and cooling to room temperature to obtain the end sealing hot melt adhesive without surface viscosity at 40 ℃.
Effect evaluation and Performance detection
Surface tackiness comparison test at 1.40 ℃
The hot melt adhesives obtained in examples 1 to 4 and comparative examples 1 to 2 were uniformly sized on a conventional 80g PET film by a direct coating method to a thickness of 15. + -. 2g/m2. Before testing, pretreating a sample, coating the sample by the method to prepare a sample strip with the length of 8 inches and the width of 1inch, and placing the sample strip in a constant-temperature oven at 40 ℃ for 4 hours at constant temperature; the pretreated specimens were immediately taken out and subjected to a circular tack test at room temperature of 23. + -. 2 ℃ and a relative humidity of 45. + -. 10%, the circular tack being tested according to the specifications of the national standard GB/T31125-2014.
TABLE 2 comparison of the initial tack performance of the ring after 40 ℃ treatment of the specific examples and the comparative examples
As can be seen from the above table data, the end-sealing hot melt adhesives obtained in examples 1 to 4 of the present invention have no tack at 40 ℃ as compared with the end-sealing hot melt adhesives for conventional sanitary materials in comparative examples 1 to 2, while the end-sealing hot melt adhesives for conventional sanitary materials in comparative examples 1 to 2 have a larger initial tack.
2. Peel Strength comparison test for bonding to different substrates
The hot melt adhesives obtained according to examples 1 to 4 and comparative examples 1 to 2 were uniformly applied to the substrates used by the fiber spray method of the coater. The substrates used mainly in this experiment included: 18g/m for sealing and water-proof end edge of disposable sanitary product2Water-repellent nonwoven fabric and 18g/m as back film2A PE breathable film; 18g/m for surface layer, flow guide layer and the like2Hydrophilic nonwoven fabric, 20g/m2Hot air non-woven fabric, 20g/m2Pearl wool fabric, 30g/m2The gram weight of the end sealing hot melt adhesive sprayed in the experiment is 5g/m for the pure cotton fabric2And 8g/m2. The sample coated and compounded by the base material is subjected to a peel strength performance test under the conditions that the indoor temperature is 23 +/-2 ℃ and the relative humidity is 45 +/-10%. The specific peel strength test standard refers to the specific specification of the national standard GB/T2792-.
TABLE 3 comparison of Peel Strength Properties of composites of specific examples and comparative examples
As can be seen from the above table data, examples 1-4 all have better adhesion strength to various types of substrates than comparative examples 1-2; it can be seen that comparative examples 1-2 have poor adhesion effect on special substrates such as hot air non-woven fabrics and pearl wool fabrics, while examples 1-4 related to the invention still have good adhesion performance on the special materials, have strong stripping force and can meet the adhesion requirements of different types of substrates.
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 (10)
1. An end sealing hot melt adhesive for sanitary materials without surface viscosity at 40 ℃ is characterized by consisting of a plasticizer, an antioxidant, a styrene-isoprene-styrene block copolymer SIS, a polyolefin copolymer, tackifying resin, wax and an ultraviolet absorbent; the weight parts of the components are respectively as follows:
0-20 parts of a plasticizer;
0.2-2 parts of antioxidant;
10-30 parts of a styrene-isoprene-styrene block copolymer;
10-40 parts of polyolefin copolymer;
10-60 parts of tackifying resin;
1-10 parts of wax;
0.1-2 parts of ultraviolet absorbent.
2. The end sealing hot melt adhesive for the sanitary materials as claimed in claim 1, wherein the components of the end sealing hot melt adhesive for the sanitary materials are as follows in parts by weight:
0.1-5 parts of a plasticizer;
0.2-1 part of antioxidant;
10-30 parts of a styrene-isoprene-styrene block copolymer;
10-30 parts of polyolefin copolymer;
10-60 parts of tackifying resin;
1-8 parts of wax;
0.1-1 part of ultraviolet absorbent.
3. An end-sealing hot melt adhesive for sanitary materials according to claim 1 or 2, wherein the plasticizer is one or a mixture of two or more selected from naphthenic oil, white oil and phthalate plasticizers.
4. An end sealing hot melt adhesive for sanitary materials as claimed in claim 1 or 2, wherein the antioxidant is selected from one or a mixture of two of hindered phenol antioxidants and phosphite antioxidants.
5. An end-sealing hot melt adhesive for sanitary materials according to claim 1 or 2, wherein the styrene-isoprene-styrene block copolymer is a styrene-isoprene-styrene block copolymer having a styrene content of 10% or more and a diblock content of 10% or more.
6. An end-sealing hot melt adhesive for sanitary materials as claimed in claim 1 or 2, wherein said polyolefin copolymer is a polyethylene copolymer, a polypropylene copolymer, a polyoctene copolymer or a mixture of one or more of binary and multicomponent copolymers thereof.
7. An end sealing hot melt adhesive for sanitary materials according to claim 1 or 2, wherein the tackifying resin is one or a mixture of two or more of petroleum resin, rosin resin and terpene resin.
8. An end-sealing hot melt adhesive for sanitary materials according to claim 1 or 2, wherein the wax is one or a mixture of two or more selected from paraffin wax, polyolefin wax, amide wax, Fischer-Tropsch wax, microcrystalline wax and EVA wax.
9. An end-sealing hot melt adhesive for sanitary materials as claimed in claim 1 or 2, wherein said ultraviolet absorber is one or a mixture of two or more selected from the group consisting of UV-P and UV-326H.
10. A preparation method of an end sealing hot melt adhesive for a sanitary material without surface viscosity at 40 ℃ is characterized by comprising the following steps:
1) adding a plasticizer and an antioxidant into a kneader, and heating to 120 +/-5 ℃;
2) adding styrene-isoprene-styrene block copolymer, adjusting the rotation speed of a kneader to 30 revolutions, and stirring at a constant speed;
3) after the mixed system is stirred to a molten state, adding the polyolefin copolymer, and continuously and uniformly stirring;
4) after the polyolefin copolymer added in the step 3) is stirred to a molten state, adding tackifying resin, and continuing stirring;
5) after the tackifying resin added in the step 4) is stirred to a molten state, sequentially adding the wax and the ultraviolet absorbent, and continuing stirring;
6) after the step 5) is finished and stirring is continued for 5 minutes, a vacuum pump is opened to vacuumize and remove bubbles, uniform stirring is continuously kept during vacuumizing, and the rotating speed of the kneader is kept at 25-35 revolutions; the stirring vacuum degree is maintained between 0.8MPa and 1 MPa; the material temperature is maintained at 125-145 ℃;
7) and finishing the timing of the step 6), uniformly stirring for 40 minutes, stopping stirring, stopping vacuum, stopping heating, discharging, and cooling to room temperature to obtain the end sealing hot melt adhesive without surface viscosity at 40 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745246.1A CN113249059A (en) | 2021-06-30 | 2021-06-30 | End sealing hot melt adhesive without surface viscosity at 40 ℃ for sanitary materials and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745246.1A CN113249059A (en) | 2021-06-30 | 2021-06-30 | End sealing hot melt adhesive without surface viscosity at 40 ℃ for sanitary materials and preparation method thereof |
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| CN113249059A true CN113249059A (en) | 2021-08-13 |
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| CN202110745246.1A Pending CN113249059A (en) | 2021-06-30 | 2021-06-30 | End sealing hot melt adhesive without surface viscosity at 40 ℃ for sanitary materials and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114456751A (en) * | 2022-01-24 | 2022-05-10 | 华威粘结材料（上海）股份有限公司 | Hot melt adhesive for automatic packaging during cotton harvesting and preparation method and application thereof |
| CN114752319A (en) * | 2021-12-13 | 2022-07-15 | 上海都昱新材料科技有限公司 | High-initial-adhesion and high-temperature-resistant hot melt adhesive and preparation method thereof |
| CN115247048A (en) * | 2022-08-23 | 2022-10-28 | 江苏鸿泰锦新材料有限公司 | Hot melt adhesive for medical protective clothing and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114752319A (en) * | 2021-12-13 | 2022-07-15 | 上海都昱新材料科技有限公司 | High-initial-adhesion and high-temperature-resistant hot melt adhesive and preparation method thereof |
| CN114456751A (en) * | 2022-01-24 | 2022-05-10 | 华威粘结材料（上海）股份有限公司 | Hot melt adhesive for automatic packaging during cotton harvesting and preparation method and application thereof |
| CN114456751B (en) * | 2022-01-24 | 2023-04-07 | 华威粘结材料（上海）股份有限公司 | Hot melt adhesive for automatic packaging of cotton harvesting and preparation method and application thereof |
| CN115247048A (en) * | 2022-08-23 | 2022-10-28 | 江苏鸿泰锦新材料有限公司 | Hot melt adhesive for medical protective clothing and preparation method thereof |
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