Unlock instant, AI-driven research and patent intelligence for your innovation.
Compound hot melt adhesive for air filter material and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A composite, air-filtering technology, applied in the direction of adhesive types, adhesives, adhesive additives, etc., can solve the problems of reduced bond strength, poor thermal stability, color change, etc., to achieve extended open time, excellent performance, and expansion wide variety of effects
Pending Publication Date: 2021-11-05
广州波塞冬材料科技有限公司
View PDF5 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Therefore, the hot melt adhesive used in the existing daily bonding and industrial production is difficult to be used as the hot melt adhesive for air filter materials.
[0003] At present, the hot melt adhesive used in air filters is mainly EVA (ethylenevinyl acetatecopolymer). The main problems of EVE hot melt adhesive are: 1. Poor thermal stability. The melt glue will decompose some low molecular substances, which have a certain odor, and eventually seriously affect the quality of the air filter; 2. During the process of thermal decomposition, it also causes serious color changes, which affects the appearance of the air filter; 3. 1. Poor low temperature resistance, severe low temperature will cause EVA to become brittle, or the bond strength will drop rapidly; 4. The bond strength is relatively general, and cannot meet the use requirements in some occasions
Some improved hot melt adhesives, because of the inevitable presence of wax products, it is difficult to increase the open time of hot melt adhesives to more than 25 seconds
For hot melt adhesives that need to be compounded with other materials, too short open time will cause relatively large technical obstacles for hot melt adhesives to compound other products, and it is difficult to achieve greater improvement in composite hot melt adhesives
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0034] The embodiment of the present invention also provides a method for preparing a composite hot-melt adhesive for air filter materials, comprising the following steps:
[0035] (1) Reactor preheating;
[0036] (2) Put polyisobutylene into the reaction kettle, heat up to 170°C-230°C and stir at a stirring speed of 20-50 rpm, until it is completely melted and kept at a constant temperature of 170°C-230°C;
[0037] (3) Add metallocenepolyolefin and random polyolefin in turn, dissolve one by one, stir at 20-50 rpm, until all melt and keep the temperature at 170°C-230°C;
[0038] (4) Add petroleum resin and antioxidant in sequence, and reduce the stirring speed by 10-30 rpm. After being fully stirred evenly, it is introduced into a screw extruder to extrude and granulate.
[0039] In a preferred embodiment, in step (2), the temperature is raised to 170°C-190°C and stirred; in step (2) and step (3), the temperature is kept constant at 170°C-190°C.
[0040] In order to have a...
Embodiment 1-3 and comparative example 1-3
[0048] The preparation method of embodiment 1-3 and comparative example 1-3 is as follows:
[0049] (1) The reactor is preheated.
[0050] (2) Put polyisobutylene, or polyisobutylene and polypropylenewax, or polypropylenewax into the reaction kettle, heat up to 180 degrees and stir at a stirring speed of 20-50 revolutions per minute, until all melt and maintain a constant temperature.
[0051] (3) Add metallocene polyolefins and random polyolefins according to the viscosity from low to high, dissolve one by one, stir at 20-50 rpm, until they are all melted and kept at a constant temperature of 180 degrees.
[0052] (4) Add petroleum resin and antioxidant in sequence, and reduce the stirring speed by 10-30 rpm. After being fully stirred evenly, it is introduced into a screw extruder to extrude and granulate.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a compound hot meltadhesive with long opening time for an air filter material and a preparation method thereof. The compound hot meltadhesive for an air filter material, provided by the invention, is prepared from the following components in parts by weight: 5-15 parts of polyisobutene, 10-30 parts of metallocene catalyzed polypropylene, 20-70 parts of random polyolefin, 10-45 parts of petroleum resin and 0.1-1 part of an antioxidant. The use amount ratio of the polyisobutene to the random polyolefin is 1: (4-7), and the use amount of the polyisobutene is 6%-15% of the total use amount of the raw materials. The compound hot meltadhesive for an air filter material provided by the invention can prolong the opening time of a product, so that the hot melt adhesive can be better compounded with other products for use.
Description
technical field [0001] The invention belongs to the technical field of hot-melt adhesives, and in particular relates to a compoundable hot-melt adhesive for air filter materials and a preparation method thereof. Background technique [0002] The role of the air filter is to protect the breathing apparatus used by people. With the increasingly serious environmental pollution and the strengthening of people's environmental awareness, air quality has become the focus of global attention, which has led to the increasing use of air filters. With the continuous improvement of the design of the filter itself, there has been a filter without a partition, and since then hot melt adhesives have been widely used in filters. In the air filter without partition, the filter material is separated by hot melt adhesive instead of the aluminum foil of the filter with partition. The filter without partitions not only eliminates the danger of partitions damaging the filter medium, but also eff...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More