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Express plastic bag sealing pressure-sensitive adhesive and preparation method thereof

A technology for pressure-sensitive adhesives and plastic bags, applied in the direction of adhesives, rosin adhesives, adhesive additives, etc., can solve the problems of stable performance and defects, and achieve the effects of increasing bonding effect, strong bonding strength, and enhancing polarity

Active Publication Date: 2018-04-13
浙江固特新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detackification of hot-melt pressure-sensitive adhesives changes significantly with the ambient temperature. It is difficult for commercially available sealing adhesives to maintain a good bonding effect under low temperature conditions in winter. Therefore, there are pure defects in the stability of product performance.

Method used

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  • Express plastic bag sealing pressure-sensitive adhesive and preparation method thereof
  • Express plastic bag sealing pressure-sensitive adhesive and preparation method thereof
  • Express plastic bag sealing pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]

[0029] Preparation method: Step 1: Heat the stirring tank to about 110°C, add naphthenic oil and white oil in proportion; Step 2: Add star SIS (styrene-isoprene-styrene) and styrene- Butadiene-styrene polymer, control the temperature not to exceed 160°C, evacuate until the vacuum degree is -0.1~0.5MPa, stir until completely melted; the third step: stop vacuuming, then vent, and add C5 petroleum resin in proportion , styrene-modified terpene resin, rosin pentaerythritol ester and PB, open the vacuum valve and continue vacuuming, stir until completely melted, and keep warm for 30 minutes; the fourth step: check whether the colloid is completely melted after venting, and stop heating when it is completely melted. When the temperature drops to 120°C, prepare to glue out; Step 5: Check the glue out process to pass the glue out.

Embodiment 2

[0031]

[0032] Preparation method: Step 1: Heat the stirring tank to about 110°C, add naphthenic oil and white oil in proportion; Step 2: Add star SIS (styrene-isoprene-styrene) and styrene- Butadiene-styrene polymer, control the temperature not to exceed 160°C, evacuate until the vacuum degree is -0.1~0.5MPa, stir until completely melted; the third step: stop vacuuming, then vent, and add C5 petroleum resin in proportion , styrene-modified terpene resin, rosin pentaerythritol ester and PB, open the vacuum valve and continue vacuuming, stir until completely melted, and keep warm for 30 minutes; the fourth step: check whether the colloid is completely melted after venting, and stop heating when it is completely melted. When the temperature drops to 120°C, prepare to glue out; Step 5: Check the glue out process to pass the glue out.

Embodiment 3

[0034]

[0035] Preparation method: Step 1: Heat the stirring tank to about 110°C, add naphthenic oil and white oil in proportion; Step 2: Add star SIS (styrene-isoprene-styrene) and styrene- Butadiene-styrene polymer, control the temperature not to exceed 160°C, evacuate until the vacuum degree is -0.1~0.5MPa, stir until completely melted; the third step: stop vacuuming, then vent, and add C5 petroleum resin in proportion , styrene-modified terpene resin, rosin pentaerythritol ester and PB, open the vacuum valve and continue vacuuming, stir until completely melted, and keep warm for 30 minutes; the fourth step: check whether the colloid is completely melted after venting, and stop heating when it is completely melted. When the temperature drops to 120°C, prepare to glue out; Step 5: Check the glue out process to pass the glue out.

[0036] Product performance parameters: Viscosity: 3000 (180°C);

[0037] Softening point: 90±5℃;

[0038] Initial sticking:>No. 14 steel bal...

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Abstract

The invention relates to a pressure-sensitive adhesive for sealing an express plastic bag. Raw materials of the pressure-sensitive adhesive comprise a certain ratio of naphthenic oil, white oil, star-shaped SIS, styrene-butadiene-styrene polymer, polybutadiene, a styrene-modified terpene resin, rosin pentaerythrityl ester and a C5 petroleum resin. A preparation method of the pressure-sensitive adhesive comprises: raising the temperature of a stirred tank to about 110 DEG C, adding naphthenic oil and white oil according to a ratio; adding star-shaped SIS (styrene-isoprene-styrene polymer) and styrene-butadiene-styrene polymer, controlling the temperature to be no more than 160 DEG C, performing vacuum pumping till the vacuum degree is in a range of -0.1 MPa to 0.5 MPa, and performing stirring till the materials are totally melt; stopping vacuum pumping, performing venting, adding a hydrogenated C5 petroleum resin, a styrene-modified terpene resin, rosin pentaerythrityl ester and polybutadiene (PB) according to a ratio, opening a vacuum valve for continuous vacuum pumping, performing stirring till the materials are totally melt, and performing thermal insulation for 30 min; detecting whether the obtained adhesive is totally melt after venting, stopping heating when the obtained product is totally melt, and performing preparation for adhesive discharge when the temperature is reduced to 120 DEG C; and performing adhesive discharge after the adhesive discharge process is checked and is qualified.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a pressure-sensitive adhesive for express plastic bag sealing and a preparation method thereof. Background technique [0002] With the rapid development of e-commerce, online shopping has entered every household, and shopping safety has become the first concern of people. How to ensure that what you buy is what you choose, and how to ensure that the goods are not lost are called issues that are concerned by stores and consumers. Ensuring that the courier bag has a high bonding strength, so that it cannot be restored quickly, fast bonding, and avoiding bag drop accidents are the technical problems faced by the sealing adhesive. [0003] The large-scale use of plastic express bags has led to the emergence of the express bag sealing glue market. Ordinary glue can only achieve the ordinary bonding effect of sealing, but the bonding is not strong, and the bonding speed is slow, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/02C09J193/04C09J145/00C09J11/08
Inventor 陈慧王欣蕊邵宝有邵晓巍吴添园
Owner 浙江固特新材料科技股份有限公司