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Three-dimensional core forming hot-melt adhesive, and preparation method and application thereof

A hot melt adhesive, core technology, applied in the direction of adhesives, adhesive types, mineral oil hydrocarbon copolymer adhesives, etc. Problems such as poor wettability, to achieve the effect of high production efficiency, moderate initial adhesion, and high peel force

Active Publication Date: 2019-12-20
佛山南宝高盛高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of industrial adhesives, hot melt adhesives (i.e. common hot melt adhesives) are commonly used to bond together a wide variety of articles including disposable absorbent articles with nonwoven substrates such as Diapers, pull-up pants, adult diapers, baby mattresses, absorbent underwear, pet pads, sanitary napkins, nursing, nursing pads, etc.; hot melt adhesives can also be used to form core composites that can be used in disposable products, one time The core structure in absorbent products is mainly used to absorb liquids such as urine, which requires that the polymer water-absorbent resin and / or wood pulp will not agglomerate or break after the core is wet; The water-absorbent resin and / or wood pulp use traditional hot-melt adhesives, which can easily cause the polymer water-absorbent resin and / or wood pulp to fall off, agglomerate or disconnect after being wet, such as the traditional hot-melt adhesives commonly used in the market for the production of diapers. Melt adhesive, its components are plasticizer, SIS, tackifying resin and antioxidant, etc. The hot melt adhesive has been proved by practice that its moisture resistance is poor, and it cannot shape the water-absorbing substance of the core. It is easy to cause shedding, agglomeration or disconnection; if it is used in the production of diapers, its peeling strength can reach 3.2N / ㎜ in a dry environment, and once soaked in normal saline for half an hour, the wood fiber, non-woven Cloth or toilet paper, etc. are completely degummed or unraveled

Method used

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  • Three-dimensional core forming hot-melt adhesive, and preparation method and application thereof
  • Three-dimensional core forming hot-melt adhesive, and preparation method and application thereof
  • Three-dimensional core forming hot-melt adhesive, and preparation method and application thereof

Examples

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preparation example Construction

[0044] The preparation method of the above-mentioned three-dimensional core forming hot melt adhesive comprises the following steps:

[0045] S1: Confirm that the bottom valve of the reactor is closed, turn on steam heating, start the stirring paddle, and add plasticizer and antioxidant;

[0046] S2: Raise the temperature of the reactor in S1 to 135-145°C, add the polymer and stir until the polymer melts;

[0047] S3: Evenly put tackifying resin into the reaction kettle of S2, and after the tackifying resin is completely melted, add liquid resin and polyisobutylene to fully react;

[0048] S4: After the reaction in S3 is completed, filter the molten material in the reactor;

[0049] S5: Pass the molten material filtered in S4 through the cooling system, the drying system in sequence, and finally pack it.

[0050] As a further preferred embodiment, after adding the polymer in S2, stir for 13-16min, scrape off the polymer on the tank wall of the reactor and the stirring paddle...

Embodiment 1-14 and comparative example 1

[0061] Weigh the raw materials according to the proportions in Table 1, respectively, and make hot melt adhesives according to the preparation methods after Table 1, correspondingly to obtain hot melt adhesives in different embodiments, see Table 1 for details:

[0062] Table 1: Embodiment 1-14 and comparative example raw material ratio table

[0063]

[0064]

[0065]

[0066] Remarks: When the polymer in the table is a mixture, the dosage ratio of the two polymers is 1:1; when the polyisobutylene is a mixture, the dosage ratio of the two polyisobutylenes is 1:1; when the wax is a mixture, the dosage of the two waxes is The ratio is 1:1.

[0067] Above-mentioned examples 1-14 are all prepared according to the following preparation methods:

[0068] S1: Weigh polymers, plasticizers, tackifying resins, antioxidants, liquid resins, polyisobutylene, wax and other raw materials according to the dosage ratio; confirm that the bottom valve of the reaction kettle is closed,...

Embodiment 5

[0075] Embodiment 5 is a preferred embodiment of the present invention. Comparative Example 2-4 weighs the corresponding raw materials according to the ratio in Embodiment 5, and then prepares according to the steps in Embodiment 5, the difference lies in the step S2 in the preparation method -S3 processes different parameters, see Table 2 for details:

[0076] Table 2: Table of Preparation Process Parameters of Comparative Examples 2-4

[0077] Step S2 Step S3 Comparative example 2 Raise the temperature of the reactor of S1 to 110-120°C The technological parameter of step S3 is constant Comparative example 3 Raise the reactor temperature of S1 to 155-165°C The technological parameter of step S3 is constant Comparative example 4 The technological parameter of step S2 is constant No vacuuming of the reactor

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Abstract

The invention discloses a three-dimensional core forming hot-melt adhesive, and a preparation method and application thereof. The three-dimensional core forming hot-melt adhesive comprises the following components in parts by weight: 10-50 parts of a polymer, 5-30 parts of a plasticizer, 25-60 parts of tackifying resin, 0.1-2 parts of an antioxidant, 0-20 parts of liquid resin and 0-20 parts of polyisobutylene. The hot-melt adhesive can be used for molding of high molecular absorbent resin and / or wood pulp in the core of a one-time absorption product, high wet peeling strength, moderate initial adhesion and the good elastic recovery rate are achieved, the hot-melt adhesive can be applied to the high molecular absorbent resin and / or a wood pulp station in the core, after the core is wet, the high molecular absorbent resin or the wood pulp does not agglomerate, fall off or break.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesive application, in particular to a three-dimensional core forming hot melt adhesive and its preparation method and application. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive, which is an environmentally friendly chemical product. In the field of industrial adhesives, hot melt adhesives (i.e. common hot melt adhesives) are commonly used to bond together a wide variety of articles including disposable absorbent articles with nonwoven substrates such as Diapers, pull-up pants, adult diapers, baby mattresses, absorbent underwear, pet pads, sanitary napkins, nursing, nursing pads, etc.; hot melt adhesives can also be used to form core composites that can be used in disposable products, one time The core structure in absorbent products is mainly used to absorb liquids such as urine, which requires that the polymer water-absorbent resin and / or wood pulp will not ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J157/02C09J193/04C09J11/06C09J11/08
CPCC09J157/02C09J193/04C09J11/06C09J11/08C08L2205/03C08L2205/035C09J2301/304C08L53/025C08L91/00C08K5/1345C08L91/06C08L53/02C08K5/526
Inventor 余俊良韦宝平曹少波黄发燊吴永升
Owner 佛山南宝高盛高新材料有限公司
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