阅读说明：本技术 一次性卫生用品用环氧树脂改性热熔压敏胶及其制备方法 (Epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products and preparation method thereof ) 是由 靳伟 刘志军 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种一次性卫生用品用环氧树脂改性热熔压敏胶及其制备方法,其原料包括基体树脂、增粘树脂、矿物油、环氧树脂和抗氧化剂；本发明的环氧树脂改性热熔压敏胶用于包含天然纤维的材料。其制备方法包括以下步骤：按配方比称取各原料；将矿物油、基体树脂和抗氧剂加入反应釜中,加热搅拌均匀,得到组分A；向组分A中加入增粘树脂和环氧树脂,搅拌均匀,抽真空,得到环氧树脂改性热熔压敏胶。本发明通过在热熔压敏胶中加入环氧树脂,可以使热熔压敏胶和含有天然材料的被黏基材反应成一体,可有效提高热熔压敏胶的粘结力和稳定性,即使是在吸水变湿后依然具有较佳的粘结力,解决了使用天然材料制备的一次性卫生用品吸水变湿容易分层的问题。(The invention discloses an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products and a preparation method thereof, wherein the raw materials comprise matrix resin, tackifying resin, mineral oil, epoxy resin and antioxidant; the epoxy resin modified hot-melt pressure-sensitive adhesive is used for materials containing natural fibers. The preparation method comprises the following steps: weighing the raw materials according to the formula ratio; adding mineral oil, matrix resin and an antioxidant into a reaction kettle, and heating and stirring uniformly to obtain a component A; and adding tackifying resin and epoxy resin into the component A, uniformly stirring, and vacuumizing to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive. According to the invention, the epoxy resin is added into the hot-melt pressure-sensitive adhesive, so that the hot-melt pressure-sensitive adhesive and the bonded substrate containing natural materials can react into a whole, the adhesive force and the stability of the hot-melt pressure-sensitive adhesive can be effectively improved, the adhesive force is still better even after the hot-melt pressure-sensitive adhesive absorbs water and becomes wet, and the problem that the disposable sanitary product prepared by using the natural materials absorbs water and becomes wet and is easy to delaminate is solved.)

1. The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products is characterized in that the raw materials of the epoxy resin modified hot-melt pressure-sensitive adhesive comprise matrix resin, tackifying resin, mineral oil, epoxy resin and an antioxidant;

the epoxy resin modified hot-melt pressure-sensitive adhesive is used for bonding a non-natural fiber material and a material containing natural fibers, or is used for bonding two materials containing natural fibers.

2. The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products according to claim 1, which is characterized by comprising the following raw materials in percentage by mass: 20-40% of matrix resin, 30-65% of tackifying resin, 15-30% of mineral oil, 5-25% of epoxy resin and 0.1-1.0% of antioxidant.

3. The epoxy resin modified hot-melt pressure-sensitive adhesive for disposable sanitary products according to claim 1, wherein the epoxy resin is one or more of BPA type epoxy resin, BPF type epoxy resin and novolac epoxy resin.

4. The epoxy resin modified hot-melt pressure-sensitive adhesive for disposable sanitary products according to claim 1, wherein the matrix resin is SBS and/or SIS;

according to the mass percentage, the styrene contents of the SBS and the SIS are both more than or equal to 30 percent.

5. The epoxy-modified hot melt pressure sensitive adhesive for disposable sanitary products according to claim 4, wherein the SBS is one or more of SBS188E, SBS792E and SBSC 540.

6. The epoxy resin modified hot melt pressure sensitive adhesive for disposable sanitary products according to claim 1, wherein the tackifying resin is one or more selected from hydrogenated or non-hydrogenated C9 petroleum resin, hydrogenated or non-hydrogenated C9C5 copolymerized petroleum resin, hydrogenated or non-hydrogenated C9-DCPD copolymerized petroleum resin, monomeric petroleum resin, styrene modified petroleum resin, pentaerythritol modified rosin resin and glycerol modified rosin resin.

7. The epoxy resin modified hot melt pressure sensitive adhesive for disposable sanitary products according to claim 1, wherein the mineral oil is composed of a paraffinic oil and a naphthenic oil, and the ratio of the paraffinic oil to the naphthenic oil is 1: 1.

8. A preparation method of the epoxy resin modified hot melt pressure sensitive adhesive for the disposable sanitary products is characterized in that the method is used for preparing the epoxy resin modified hot melt pressure sensitive adhesive for the disposable sanitary products of any one of claims 1 to 7, and comprises the following steps:

(1) weighing the raw materials according to the formula ratio;

(2) adding mineral oil, matrix resin and an antioxidant into a reaction kettle, and heating and stirring uniformly to obtain a component A;

(3) and adding tackifying resin and epoxy resin into the component A, uniformly stirring, and vacuumizing to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

9. The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products as claimed in claim 8, wherein in the step (2), the mineral oil, the matrix resin and the antioxidant are added into a reaction kettle, heated to 120-150 ℃, and uniformly stirred to obtain the component A.

10. The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products as claimed in claim 8, wherein the temperature of the component A added in the step (3) is kept at 120-150 ℃ after the tackifying resin and the epoxy resin are added, the component A is uniformly stirred, and the component A is vacuumized to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

Technical Field

The invention relates to the technical field of pressure-sensitive adhesives, in particular to an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products and a preparation method thereof.

Background

In recent years, with the economic development and the improvement of the living standard of people, disposable sanitary products enter thousands of households, at present, the disposable sanitary products mainly comprise baby diapers, adult diapers, disposable nursing pads and sanitary towels, at present, materials for preparing the disposable sanitary products generally comprise PP or PET non-woven fabrics, PE films, water-absorbing polymers, dust-free paper, spandex filaments, wet strength paper and the like, and the materials are bonded by using hot melt adhesives in the preparation process.

Because the disposable sanitary products are used for absorbing liquid excrement of human bodies, the paper diapers, the sanitary towels and the like can absorb water and become wet after contacting the liquid excrement, the existing hot melt adhesive is generally physically adsorbed and mechanically anchored in the bonding mechanism, the existing hot melt adhesive bonding material is adopted, and the hot melt adhesive can be easily separated from the adherend after wetting, so that part of materials in the disposable sanitary products can lose the bonding force with the hot melt adhesive instantly to be layered after absorbing water and becoming wet, and the reduction causes the change of the structures of the products such as the paper diapers and the sanitary towels during use, thereby influencing the reduction of the water absorption performance of the products, the concentration of the water absorption position caused by the structural displacement and the influence on the comfort of consumers.

Especially, in recent years, as the consumption level of people rises, the requirements on the properties such as comfort, naturalness, no stimulation, natural environmental protection, recyclability, degradability and the like are increased, a large amount of natural materials such as wood pulp, pure cotton, bamboo fiber materials and the like are introduced into production materials of disposable sanitary products, the content of dust-free paper and wet strength paper is relatively increased, and the natural materials are well bonded by common hot melt adhesives, so that the bonding strength is greatly reduced or delaminated after the materials absorb water and become wet, and the functionality and the comfort of the products are influenced.

Disclosure of Invention

The invention aims to provide an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable sanitary products, which is characterized in that the hot-melt pressure-sensitive adhesive and a bonded substrate containing a natural material can be reacted into a whole by adding the epoxy resin into the hot-melt pressure-sensitive adhesive, so that the adhesive force and the stability of the hot-melt pressure-sensitive adhesive can be effectively improved, and the problem that the disposable sanitary products prepared by using the natural material are easy to layer after absorbing water and becoming wet is solved.

The invention also aims to provide a preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products, which is simple to operate and can effectively avoid the aging of the raw materials by setting the operating temperature.

In order to achieve the purpose, the invention adopts the following technical scheme:

an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products is prepared from matrix resin, tackifying resin, mineral oil, epoxy resin and antioxidant;

the epoxy resin modified hot-melt pressure-sensitive adhesive is used for bonding a non-natural fiber material and a material containing natural fibers, or is used for bonding two materials containing natural fibers.

Further, the epoxy resin modified hot-melt pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 20-40% of matrix resin, 30-65% of tackifying resin, 15-30% of mineral oil, 5-25% of epoxy resin and 0.1-1.0% of antioxidant.

Furthermore, the epoxy resin is selected from one or more of BPA type epoxy resin, BPF type epoxy resin and novolac epoxy resin.

Further, the matrix resin is SBS and/or SIS;

according to the mass percentage, the content of styrene in the SBS and the SIS is more than or equal to 30 percent.

Further, the SBS is one or more of SBS188E, SBS792E, and SBSC 540.

Further, the tackifying resin is selected from one or more of hydrogenated or non-hydrogenated C9 petroleum resin, hydrogenated or non-hydrogenated C9C5 copolymerized petroleum resin, hydrogenated or non-hydrogenated C9-DCPD copolymerized petroleum resin, monomeric petroleum resin, styrene modified petroleum resin, pentaerythritol modified rosin resin and glycerol modified rosin resin.

Further, the mineral oil is composed of a paraffinic oil and a naphthenic oil, and the ratio of the paraffinic oil to the naphthenic oil is 1: 1.

A preparation method of an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable sanitary products is used for preparing the epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products, and comprises the following steps:

(1) weighing the raw materials according to the formula ratio;

(2) adding mineral oil, matrix resin and an antioxidant into a reaction kettle, and heating and stirring uniformly to obtain a component A;

(3) and adding tackifying resin and epoxy resin into the component A, uniformly stirring, and vacuumizing to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

Further, in the step (2), the mineral oil, the matrix resin and the antioxidant are added into a reaction kettle, heated to 120-150 ℃, and uniformly stirred to obtain the component A.

Further, after tackifying resin and epoxy resin are added into the component A in the step (3), the temperature needs to be kept at 120-150 ℃, the mixture is uniformly stirred, and the mixture is vacuumized to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

The effective results of the technical scheme are as follows: the technical scheme is that epoxy resin with polarity and epoxy group is added in the epoxy resin modified hot-melt pressure-sensitive adhesive, so that the epoxy resin modified hot-melt pressure-sensitive adhesive system has polarity and reactive epoxy group, and because the main components of the natural materials such as wood pulp, pure cotton, bamboo fiber material, dust-free paper, wet strength paper and the like are cellulose, hydroxyl in the cellulose and the epoxy group in the epoxy resin modified hot-melt pressure-sensitive adhesive system can generate chemical reaction to generate ether compounds with stable structure, the epoxy resin modified hot-melt pressure-sensitive adhesive and the bonded substrate containing the natural material can react into a whole, so that the adhesive force between the epoxy resin modified hot-melt pressure-sensitive adhesive and the substrate can be greatly improved, the adhesive stability in long-term storage can be improved, and because the ether compounds formed after the epoxy group and the hydroxyl are combined are insoluble in water even after absorbing and becoming wet, the ether compound still keeps a stable structure, so that the disposable sanitary product containing the natural fiber material still has good adhesive force after absorbing water and changing moisture, and the problem that the adhesive force of the common hot melt adhesive natural material is reduced or delaminated after absorbing water and changing moisture is solved.

Detailed Description

The technical solution of the present invention will be further described with reference to the following embodiments.

An epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products is prepared from matrix resin, tackifying resin, mineral oil, epoxy resin and antioxidant;

the epoxy resin modified hot melt pressure sensitive adhesive is used for bonding a non-natural fiber material and a material containing natural fibers, or is used for bonding two materials containing natural fibers.

It is worth explaining that, the epoxy resin with polarity and epoxy group is added in the epoxy resin modified hot-melt pressure-sensitive adhesive, so that the epoxy resin modified hot-melt pressure-sensitive adhesive has polarity and epoxy group capable of reacting, on one hand, because the epoxy resin in the epoxy resin modified hot-melt pressure-sensitive adhesive has stronger polarity, electronic clouds around the epoxy resin generate external attraction force due to uneven distribution of the electronic clouds, intermolecular force between the hot-melt pressure-sensitive adhesive and a substrate to be adhered can be increased, the adhesive force between the epoxy resin modified hot-melt pressure-sensitive adhesive and the substrate to be adhered is improved, and the adhesive has better adhesive effect with PP non-woven fabric, PE film and natural materials. On the other hand, because the main component of the natural materials such as wood pulp, pure cotton, bamboo fiber materials, dust-free paper and wet strength paper is cellulose, hydroxyl in the cellulose and epoxy groups in an epoxy resin modified hot melt pressure sensitive adhesive system can generate a ether compound with a stable structure through chemical reaction, so that the epoxy resin modified hot melt pressure sensitive adhesive and a bonded substrate containing the natural materials are reacted into a whole, the adhesive force between the epoxy resin modified hot melt pressure sensitive adhesive and the substrate is greatly improved, the adhesive stability in long-term storage is improved, and the ether compound formed after the epoxy groups and the hydroxyl are combined is insoluble in water, even after water absorption and moisture change, the ether compound still keeps a stable structure, so the epoxy resin modified hot melt pressure sensitive adhesive adopting the technical scheme bonds the material containing the natural fibers, and the epoxy resin modified hot melt pressure sensitive adhesive and the material containing the natural fibers still keep a better adhesive force after water absorption and moisture change, therefore, the problem that the adhesive force of the common hot melt adhesive for adhering natural materials is reduced or delaminated after absorbing water and changing moisture is solved, and the epoxy resin modified hot melt pressure sensitive adhesive in the technical scheme is more suitable for adhering disposable sanitary products containing natural fiber materials.

Moreover, in the technical scheme, the epoxy resin modified hot-melt pressure-sensitive adhesive adopts a principle of two-component glue, the epoxy resin modified hot-melt pressure-sensitive adhesive is used as a single-component adhesive, a bonded substrate is used as a curing agent, the epoxy resin modified hot-melt pressure-sensitive adhesive and the bonded substrate can be in contact reaction during bonding, and the epoxy resin modified hot-melt pressure-sensitive adhesive and the bonded substrate are stored separately at other times, so that the problems that the two-component glue needs to be stored separately, the storage time is short, the coating time limit is short, and the coating equipment needs to be cleaned frequently are solved. In addition, the epoxy resin modified hot-melt pressure-sensitive adhesive provided by the technical scheme is solid with 100% solid content at normal temperature, so that the epoxy resin modified hot-melt pressure-sensitive adhesive is convenient to store and stable to store for a long time.

Specifically, the matrix resin in the formula can provide a framework for the hot-melt pressure-sensitive adhesive structure; the tackifying resin can increase the viscosity of the hot-melt pressure-sensitive adhesive; the thinner can reduce the thin consistency of the hot-melt pressure-sensitive adhesive, and is convenient to coat and use; the antioxidant can enhance the ageing resistance of the hot-melt pressure-sensitive adhesive.

Further, the epoxy resin modified hot-melt pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 20-40% of matrix resin, 30-65% of tackifying resin, 15-30% of mineral oil, 5-25% of epoxy resin and 0.1-1.0% of antioxidant.

It is worth mentioning that if the mass percentage of the epoxy resin in the epoxy resin modified hot melt pressure sensitive adhesive is too low, the chemical reaction degree generated by the epoxy group and the hydroxyl group is too small, so that the prepared epoxy resin modified hot melt pressure sensitive adhesive has low adhesive force; if the epoxy resin modified hot-melt pressure-sensitive adhesive is too high, the viscoelasticity of the epoxy resin modified hot-melt pressure-sensitive adhesive can be affected, at the moment, the dosage of the matrix resin and the tackifying resin mineral oil is required to be reduced to adjust the viscoelasticity of the epoxy resin modified hot-melt pressure-sensitive adhesive, however, the reduction of the dosage of the raw materials can cause the hyposensitivity of the epoxy resin modified hot-melt pressure-sensitive adhesive to be weakened, negative performance is generated, and the production and the use are not facilitated.

If the mass percentage of the matrix resin in the epoxy resin modified hot-melt pressure-sensitive adhesive is less than 14%, the reinforced skeleton structure in the epoxy resin modified hot-melt pressure-sensitive adhesive is less, so that the adhesive force is weakened and the adaptability to the base material is poor; if the mass percent of the matrix resin is more than 28 percent, the epoxy resin modified hot-melt pressure-sensitive adhesive is too thick and is inconvenient to coat. The mass percentage of the tackifying resin in the scheme is 30-65%, the stronger the viscosity of the epoxy resin modified hot-melt pressure-sensitive adhesive along with the increase of the use amount of the tackifying resin, but the too much tackifying resin can cause hardening of colloid and poor low-temperature resistance effect, and when the tackifying resin is applied to disposable hygienic products, if the colloid is too hard, the comfort is affected, and the experience feeling of users is reduced; if the amount of the tackifying resin is too small, the high temperature resistance of the epoxy resin modified hot melt pressure sensitive adhesive is deteriorated, and the adhesive force of the epoxy resin modified hot melt pressure sensitive adhesive to a substrate to be adhered is reduced at high temperature. If the amount of the mineral oil is too large, the colloid is too soft to be formed; if the amount of mineral oil is too small, the colloid is too thick to be used for coating.

Furthermore, the epoxy resin is selected from one or more of BPA type epoxy resin, BPF type epoxy resin and novolac epoxy resin.

It is worth to be noted that the novolac epoxy resin is solid, and after the novolac epoxy resin is added into the system, the prepared epoxy resin modified hot-melt pressure-sensitive adhesive has good high-temperature resistance effect; most of BPA type epoxy resin and BPF type epoxy resin are liquid, the low temperature resistant effect of the epoxy resin modified hot melt pressure sensitive adhesive prepared by adding the BPA type epoxy resin and the BPF type epoxy resin into the system is good, and in the actual production, the proper type of epoxy resin can be selected according to the requirements of consumers.

Further, the matrix resin is SBS and/or SIS;

according to the mass percentage, the content of styrene in the SBS and the SIS is more than or equal to 30 percent.

Specifically, SBS adopts organic lithium as initiator, takes styrene and butadiene as raw materials to synthesize styrene-butadiene-styrene block copolymer, SIS is called styrene-isoprene-styrene block copolymer entirely, is a thermoplastic elastomer generated by styrene and isoprene solution polymerization, has the characteristics of good fluidity, low emulsion degree and good compatibility with additives, and in addition, has good electrical property, light transmission, air permeability and five polluting properties.

According to the technical scheme, the SBS with the styrene content being more than or equal to 30% and the SIS with the styrene content being more than or equal to 30% are selected as the matrix resin, the compatibility of the matrix resin and the epoxy resin can be improved, the incompatibility of the matrix resin and the epoxy resin during the preparation of the hot-melt pressure-sensitive adhesive is avoided, the adhesive force and the stability of the hot-melt pressure-sensitive adhesive are further improved, when the styrene content in the SBS and the SIS is more than or equal to 30%, the tensile strength and the hardness of the prepared epoxy resin modified hot-melt pressure-sensitive adhesive for disposable hygienic products are both increased, and the viscosity is reduced after drying.

Further, the SBS is one or more of SBS188E, SBS792E, and SBSC 540.

Specifically, SBS188E and SBS792E are produced by the holy petrochemical company and SBSC540 is produced by the dinnesol company.

Furthermore, the tackifying resin is selected from one or more of hydrogenated or non-hydrogenated C9 petroleum resin, hydrogenated or non-hydrogenated C9C5 copolymerized petroleum resin, hydrogenated or non-hydrogenated C9-DCPD copolymerized petroleum resin, monomeric petroleum resin, styrene modified petroleum resin, pentaerythritol modified rosin resin and glycerol modified rosin resin, and the tackifying resin can keep benzene rings or polarity in the tackifying resin, so that the compatibility of the tackifying resin and the epoxy resin can be improved.

Further, the mineral oil was composed of a paraffinic oil and a naphthenic oil in a ratio of 1: 1.

It is worth noting that both SBS and SIS have good compatibility with paraffinic oils, but paraffinic oils have poor viscosity and naphthenic oils have strong viscosity, so the ratio of paraffinic oil to naphthenic oil in this embodiment is 1:1, not only can improve the solubility of matrix resin and mineral oil, but also can improve the cohesive force of the whole colloid system.

A preparation method of an epoxy resin modified hot-melt pressure-sensitive adhesive for disposable sanitary products comprises the following steps:

(1) weighing the raw materials according to the formula ratio;

(2) adding mineral oil, matrix resin and an antioxidant into a reaction kettle, and heating and stirring uniformly to obtain a component A;

(3) and adding tackifying resin and epoxy resin into the component A, uniformly stirring, and vacuumizing to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

It is worth mentioning that, because the matrix resin has a larger molecular weight than other raw materials, if the matrix resin is added and mixed with other raw materials, a large amount of matrix resin cannot be uniformly fused with other raw materials, and the finished product is unqualified, when the epoxy resin modified hot melt pressure sensitive adhesive is prepared, the mineral oil and the matrix resin are uniformly melted, and then the other raw materials are added, the melting is slower when the temperature is lower, the melting is faster when the temperature is higher, but the temperature is too high, the matrix resin can age, the molecular chain is broken too much, the adhesive force of the finished product is reduced, and the antioxidant is added to reduce the aging of the matrix resin.

Most of the tackifying resin is solid material, and the epoxy resin is liquid material, so the tackifying resin is added into the component A for heating and melting in the step (3), the temperature in the reaction kettle can be reduced in the melting process of the tackifying resin, the aging of the material is further reduced, and finally the liquid epoxy resin is added and uniformly mixed, so that the epoxy resin modified hot melt pressure sensitive adhesive can be obtained.

Further, in the step (2), the mineral oil, the matrix resin and the antioxidant are added into a reaction kettle, heated to 120-150 ℃, and uniformly stirred to obtain the component A.

In the step (2), the melting of the matrix resin is facilitated at 120-150 ℃, and the aging of the matrix resin caused by long-time heating is avoided.

Further, after tackifying resin and epoxy resin are added into the component A in the step (3), the temperature needs to be kept at 120-150 ℃, the mixture is uniformly stirred, and the mixture is vacuumized to obtain the epoxy resin modified hot-melt pressure-sensitive adhesive.

Because the petroleum resin and the epoxy resin can become liquid when reaching the softening point and are easy to be mixed uniformly, if the temperature is too high, the petroleum resin and the epoxy resin can be aged, preferably, in the actual preparation process, the temperature of the step (2) is set to be slightly higher than that of the step (3), and the raw materials can be further prevented from being aged.

The technical scheme of the invention is further illustrated by combining specific examples and comparative examples.

Example 1

The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products comprises, by mass, 30% of matrix resin, 44.5% of tackifying resin, 20% of mineral oil, 5% of epoxy resin and 0.5% of antioxidant.

Wherein the mineral oil is composed of 10% naphthenic oil and 10% wax base oil, the base resin is composed of 14% SBS188E and 16% SBSC540, and the tackifying resin is composed of 20% hydrogenated C9 petroleum resin and 24.5% hydrogenated C9C5 petroleum resin.

The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive comprises the following steps:

(1) weighing the raw materials according to the formula ratio;

(2) adding 10% of naphthenic oil (ClarityKN 4010), 10% of paraffin-based oil (KP6010), 14% of SBS188E, 16% of SBSC540 and 0.5% of antioxidant into a reaction kettle according to mass percent, heating to 120-150 ℃, and uniformly mixing to obtain a component A;

(3) adding 20% hydrogenated C9 petroleum resin (Lianchao FM100), 24.5% hydrogenated C9C5 petroleum resin (Zhongke information source and Zhongke information source) and 5% epoxy resin (Balin petrochemical 128) into the component A, keeping the temperature at 120 ℃, stirring uniformly, and finally vacuumizing to remove bubbles to obtain the epoxy resin modified hot melt pressure sensitive adhesive.

The hot-melt pressure-sensitive adhesive modified by epoxy resin obtained in the embodiment is sprayed by a Dainate hot-melt adhesive machineCoating treatment, wherein the temperature of a glue machine is set to 160 ℃ of a glue cylinder, 165 ℃ of a glue tube, 170 ℃ of a glue gun, 160 ℃ of atomizing air and the gluing amount is 2g/m in the spraying process²。

Comparative example

The raw materials of the common hot melt adhesive comprise 30% of matrix resin, 47.5% of tackifying resin, 22% of naphthenic oil and 0.5% of antioxidant, and the raw materials of the common hot melt adhesive do not comprise epoxy resin.

Wherein the naphthenic oil is a 4010 product of Clarity, the matrix resin is composed of 16% SEBS and 14% SSBR, and the tackifying resin is composed of 23% hydrogenated C9 petroleum resin and 24.5% hydrogenated C9C5 petroleum resin. The preparation method of the common hot melt adhesive is similar to that of example 1.

Specifically, the epoxy resin modified hot-melt pressure-sensitive adhesive prepared in example 1 and the common hot-melt adhesive prepared in the comparative example were sprayed, and the dry peel property and the wet peel property of the two were measured for the following adhesive substrates, and the measurement results are shown in table 1 below:

table 1 test results of example 1 and comparative example

As can be seen from the above table, the epoxy resin modified hot melt pressure sensitive adhesive in this embodiment has better adhesion to PP non-woven fabric, wet strength paper, wood pulp, bamboo fiber non-woven fabric, bamboo charcoal fiber non-woven fabric, pure cotton spunlace fabric and non-woven fabric, and the wet peeling is kept good after the substrate becomes wet after imbibing, so that the epoxy resin modified hot melt pressure sensitive adhesive in this embodiment can be used for disposable hygienic products made of various materials, and can effectively reduce the delamination phenomenon of the product after imbibing, well maintain the integrity of the disposable hygienic product, avoid the problems of lumping, breaking, leakage and the like of the product, make the consumer wear more comfortable and drier, and solve the problems of adhesion reduction or delamination of the disposable hygienic product after wetting in the prior art.

In the comparative example, when the common hot melt adhesive is dried, the adhesive force of the common hot melt adhesive and the bonded substrate is sharply reduced after the common hot melt adhesive absorbs water and becomes wet, particularly, the wet peeling force of the bonded substrate made of natural materials such as the wet strength paper, the wood pulp, the bamboo fiber non-woven fabric, the bamboo charcoal fiber non-woven fabric, the pure cotton spunlace fabric and the dust-free paper is greatly reduced, and the wet peeling force is close to 0, so that the disposable sanitary product made of the natural materials loses the adhesive force and is layered when absorbing the liquid, and the function and the comfort level of users are influenced.

Example 2

The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products comprises, by mass, 20% of matrix resin, 51.5% of tackifying resin, 20% of mineral oil, 8% of epoxy resin and 0.5% of antioxidant.

Wherein the mineral oil consists of 10% naphthenic oil and 10% paraffin-based oil; the matrix resin consists of 8% SIS1209 (barlington), 7% SBS3545 (luo chang) and 5% SIS1300 (poly saint); the tackifying resin consists of 20 percent of hydrogenated C9 petroleum resin, 15 percent of Islam monomer resin F100 and 16.5 percent of Kemao glycerol modified rosin resin KD-100L.

The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive in this embodiment is as follows:

(1) weighing the raw materials according to the formula ratio;

(2) adding 10% of naphthenic oil (ClarityKN 4006), 10% of paraffin-based oil (KP6010), 8% of SIS1209, 7% of SBS3545, 5% of SIS1300 and 0.5% of antioxidant into a reaction kettle according to mass percent, heating to 130 ℃, and uniformly mixing to obtain a component A;

(2) adding 20% of hydrogenated C9 petroleum resin (Islam MBG295), 15% of Islam monomer resin F100, 16.5% of komao glycerol modified rosin resin KD-100L and 8% of epoxy resin (Ktao KB-28) into the component A, keeping the temperature at 120 ℃, uniformly stirring, and vacuumizing to remove bubbles to obtain the epoxy resin modified hot melt pressure-sensitive adhesive.

For the epoxy resin modified hot melt pressure sensitive adhesive obtained in this example, the heat of Dainaite brand was usedThe glue melting machine carries out spraying treatment, the temperature of the glue melting machine is set to be 150 ℃ of glue cylinder, 155 ℃ of glue tube, 160 ℃ of glue gun, 160 ℃ of atomizing air and the glue applying amount is 2g/m in the spraying process²As can be seen from the following table, the epoxy resin modified hot melt pressure sensitive adhesive of this embodiment has good performance in bonding various materials, and the bonding test results are as follows:

table 1 test results of example 2 and comparative example

Example 3

The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products comprises, by mass, 20% of matrix resin, 46.5% of tackifying resin, 25% of mineral oil, 8% of epoxy resin and 0.5% of antioxidant.

Wherein the mineral oil consists of 12.5% naphthenic oil and 12.5% paraffin-based oil; the matrix resin was composed of 8% SIS2600 (Poly san Co.), 5% SBS188E (Ba Ling petrochemical Co.), 7% SIS5562 (Li Chang Rong Co.); the tackifying resin consisted of 10% hydrogenated C9 petroleum resin (rhesus HA100), 15% hydrogenated C9 resin (eastman C6100SD), and 21.5% pentaerythritol modified rosin resin (komao 146A).

The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive in this embodiment is as follows:

(1) weighing the raw materials according to the formula ratio;

(2) according to the mass percent, 12.5 percent of naphthenic oil (ClarityKN 4006), 12.5 percent of paraffin-based oil (KP6010), 8 percent of SIS2600 (Poly Sheng), 5 percent of SBS188E (Barlingpetrochemical), 7 percent of SIS5562 (Liangrong company) and 0.5 percent of antioxidant are added into a reaction kettle, heated to 150 ℃, and mixed uniformly to obtain a component A;

(2) adding 10% of hydrogenated C9 petroleum resin (Heng HA100), 15% of hydrogenated C9 resin (Istman C6100SD), 21.5% of pentaerythritol modified rosin resin (Kemao company 146A) and 8% of BPF type epoxy resin (NPEF 170 of south Asia of Taiwan) into the component A, keeping the temperature at 130 ℃, stirring uniformly, and vacuumizing to remove bubbles to obtain the epoxy resin modified hot melt pressure sensitive adhesive.

The epoxy resin modified hot-melt pressure-sensitive adhesive obtained in the embodiment is sprayed by a Dainate hot-melt adhesive machine, the temperature of the adhesive machine in the spraying process is set to 140 ℃ of an adhesive cylinder, 145 ℃ of a rubber tube, 150 ℃ of an adhesive gun, 150 ℃ of atomizing air, and the gluing amount is 2g/m²As can be seen from the following table, the epoxy resin modified hot melt pressure sensitive adhesive of this embodiment has good performance in bonding various materials, and the bonding test results are as follows:

table 1 test results of example 3 and comparative example

Example 4

The epoxy resin modified hot-melt pressure-sensitive adhesive for the disposable sanitary products comprises, by mass, 15% of matrix resin, 52.5% of tackifying resin, 28% of mineral oil, 4% of epoxy resin and 0.5% of antioxidant.

Wherein the mineral oil consists of 14% of oil changed and 14% of paraffin-based oil; the matrix resin is composed of 5% of SIS2600 (Polysaint), 6% of SBS C540 (Dynasol) and 4% of SBS3545 (Liangrong); the tackifying resin consisted of 15% hydrogenated C5C9 copolymerized petroleum resin (exxon E5600), 15% hydrogenated C9 resin (cologne P100) and 22.5% pentaerythritol modified rosin resin (146 from komata).

The preparation method of the epoxy resin modified hot-melt pressure-sensitive adhesive in this embodiment is as follows:

(1) weighing the raw materials according to the formula ratio;

(2) according to the mass percent, adding 14 percent of naphthenic oil (ClarityKN 4006), 14 percent of paraffin-based oil (KP6010), 5 percent of PolySheng SIS2600, 6 percent of Dynax SBS C540, 4 percent of Liangrong SBS3545 and 0.5 percent of antioxidant into a reaction kettle, heating to 120-150 ℃, and uniformly mixing to obtain a component A;

(2) adding 15% of Exxon hydrogenated C5C9 copolymerized petroleum resin E5600, 15% of Kelong hydrogenated C9 resin P100, 16.5% of Kemao pentaerythritol modified rosin resin 146 and 4% of BPF Kelong phenolic aldehyde type epoxy resin (KEP1131) into the component A, keeping the temperature at 110-130 ℃, uniformly stirring, vacuumizing and removing bubbles to obtain the epoxy resin modified hot melt pressure sensitive adhesive.

The epoxy resin modified hot-melt pressure-sensitive adhesive obtained in the embodiment is sprayed by a Dainate hot-melt adhesive machine, the temperature of the adhesive machine in the spraying process is set to 120 ℃ of an adhesive cylinder, 125 ℃ of a rubber tube, 130 ℃ of an adhesive gun, 130 ℃ of atomizing air, and the gluing amount is 2g/m²As can be seen from the following table, the epoxy resin modified hot melt pressure sensitive adhesive of this embodiment has good performance in bonding various materials, and the bonding test results are as follows:

table 1 test results of example 4 and comparative example

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.