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Hot-melt pressure-sensitive adhesive for backing adhesive bag and preparation method thereof

A hot-melt pressure-sensitive adhesive and plastic bag technology, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of affecting product appearance, low bonding strength, and adhesive bag loss. Achieve low toxicity, high peel strength, softness and good electrical insulation performance

Inactive Publication Date: 2017-06-13
河北方大新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still the following problems in the use of hot-melt pressure-sensitive adhesives: 1. Oil leakage from pressure-sensitive adhesives. Generally, oil leakage occurs in commercially available hot-melt pressure-sensitive adhesives within 3 to 5 months, which not only affects the appearance of the product, but also The adhesive performance of the liquid-leaved adhesive layer continues to decrease, and even causes the adhesive bag to lose its adhesiveness. This phenomenon is self-evident for the danger of international mail that needs to be transmitted for a long time from production and transportation to customers; 2. Adhesive strength Low, unable to meet the requirement of destroying the adhesive surface when the cover is removed; 3. Poor stability, prone to performance fluctuations due to external environmental influences
The crux of the above problems is that there are certain defects in the formulation of hot-melt pressure-sensitive adhesives. Therefore, improving the formulation and preparation method of hot-melt pressure-sensitive adhesives and improving their performance indicators has become an urgent problem to be solved.

Method used

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  • Hot-melt pressure-sensitive adhesive for backing adhesive bag and preparation method thereof
  • Hot-melt pressure-sensitive adhesive for backing adhesive bag and preparation method thereof

Examples

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Effect test

preparation example Construction

[0022] The preparation method of above-mentioned hot-melt pressure-sensitive adhesive is, and it comprises the steps:

[0023] a. Weigh each component of the raw material according to the formula, put dioctyl terephthalate, antioxidant 1010 and DLTP into the reaction kettle, stir and heat;

[0024] b. When the heating temperature reaches 145±5°C, slowly add SIS, stir for 5 minutes after adding, then add 1 / 3 of the total amount of C5 petroleum resin; continue to stir and heat to 165±5°C, keep the temperature at 25 rpm Stir for 150±10 minutes under the condition of 10 minutes; keep the temperature range of 165±5°C because if the temperature is too low, it will lead to incomplete melting and SIS agglomeration, and if the temperature is too high, it will cause unsaturated double bonds in SIS. Thermal oxidation will occur and degrade, reducing the cohesive strength of the adhesive.

[0025] c. Under the condition of temperature control and stirring, add the remaining 2 / 3 amount of...

Embodiment

[0029] Selection of raw materials: The base resin SIS is 3433N SIS (tri-block copolymer of styrene-isoprene-styrene) produced by ZEON CORPORRION in Japan, and its SI content is 56%. The grade of tackifier C5 petroleum resin is 3200 from Ningbo Jinhai Chenguang. Antioxidant 1010 and antioxidant DLTP are selected from Nanjing Jingtianwei Chemical Co., Ltd.

[0030] The following are the formulas of several groups of raw materials (in kg):

[0031] Table 1 List of five formulations of hot-melt pressure-sensitive adhesives

[0032]

[0033] The preparation method of hot melt pressure sensitive adhesive is as follows:

[0034] a. Weigh each component according to the ratio of Example 3, take dioctyl terephthalate, antioxidant 1010, and DLTP into the reaction kettle, stir and heat; b. When the heating temperature reaches 145°C, slowly add Styrene-isoprene-styrene tri-block copolymer, after stirring for 5 minutes, add 17kg of modified aliphatic C5 petroleum resin; continue to s...

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Abstract

A hot-melt pressure-sensitive adhesive for adhesive bags, which is made of raw materials in parts by mass: 31-38 base resins, 48-55 tackifiers, 11-17 softeners, and 0.8-1.4 antioxidants; The base resin is a three-block copolymer of styrene-isoprene-styrene, the tackifier is a modified aromatic C5 petroleum resin, and the softener is dioctyl terephthalate. The antioxidant is a mixture of antioxidant 1010 and antioxidant DLTP. The hot-melt pressure-sensitive adhesive prepared according to the above formula has the characteristics of good stickiness and no oil leakage, especially the low toxicity and high safety of various raw materials, no potential harm to the human body, and meets the environmental protection requirements at home and abroad.

Description

technical field [0001] The invention relates to the technical field of adhesives, and is particularly suitable for hot-melt pressure-sensitive adhesives for special adhesive bags for logistics and express delivery. Background technique [0002] Adhesive bags are widely used in the logistics and express delivery industry. An important factor that determines the performance of adhesive bags is the hot-melt pressure-sensitive adhesive used to close the adhesive bags. In recent years, with the enhancement of people's awareness of environmental protection and health, it is required that the items in the circulation and storage links are not harmful to the human body. Hot melt pressure sensitive adhesives currently on the market use waste oil or phthalates (dioctyl phthalate DOP, dibutyl phthalate DBP, dioctyl sebacate DOS, adipic acid Dioctyl ester (DOA) is used as a softener, and the European Union explicitly prohibits the application of these substances in the field of pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J11/06C09J11/08
Inventor 杨志杜中泰
Owner 河北方大新材料股份有限公司
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