One-Sided Latex Adhesive for Fast Roll-Pack Mattress Bonding
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Solution Overview
Problem
Existing roller adhesives based on natural rubber latex suffer from ammonia odor, slow strength development, and are inadequate for demanding applications like roll-packing mattresses, which require immediate bonding and vacuum rolling.
Innovation Solution
A water-based adhesive comprising natural rubber latex and an acidic resin, adjusted with ammonia or a base to neutralize the pH, enhancing bonding strength and reducing odor, while using sustainable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If natural rubber latex is used as the adhesive base, then the adhesive is sustainable and cost-effective, but it produces strong ammonia odor and has slow strength development
Solution Approach 1:
The patent modifies the chemical parameters of the adhesive by adjusting pH levels and incorporating acidic resins alongside natural rubber latex. This parameter change transforms the adhesive's chemical properties to reduce ammonia odor while enhancing bonding strength and setting speed, directly resolving the contradiction between sustainability and performance.
Solution Approach 2:
The invention creates a composite adhesive system combining natural rubber latex with acidic resins and other components. This composite approach maintains the sustainable aspect of using natural rubber while adding materials that eliminate ammonia odor and improve bonding characteristics, achieving both environmental and performance goals.
2Productivity
If conventional natural rubber latex adhesive is used, then the adhesive is environmentally friendly, but it is inadequate for demanding applications like roll-packing mattresses requiring immediate bonding
Solution Approach 1:
The adhesive formulation incorporates acidic resins and pH adjusters that prepare the adhesive for rapid setting before application. This preliminary chemical preparation ensures that when the adhesive is applied to substrates, it achieves immediate bonding capability suitable for roll-packing operations while maintaining environmental friendliness.
Solution Approach 2:
By changing the chemical parameters through pH adjustment and resin incorporation, the adhesive achieves rapid bonding speed required for industrial applications like mattress roll-packing, while the formulation maintains sustainable, environmentally friendly characteristics.
3Adaptability or versatility
If acid-sensitive adhesive is used, then the adhesive can be activated by acid, but it can only be used at specific basic pH levels limiting its applicability
Solution Approach 1:
The adhesive formulation is designed to function effectively across a universal pH range by incorporating acidic resins and pH adjusters that work synergistically with natural rubber latex. This multi-functional design allows the adhesive to be applied and activated under various pH conditions, eliminating the limitations of acid-sensitive adhesives while maintaining ease of manufacture through a single-component system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The adhesive achieves rapid bonding, high recovery rates, and minimal deformation in roll-pack processes, surpassing conventional latex-based adhesives in performance and sustainability.
Implementation Method 1
These dispersions can be coagulated either by applying an external force, such as for example by a shear force, or by using a second component which is considered to activate the dispersion, such as for example an acid or a multivalent cation.
Implementation Method 2
whether or not precipitation occurs, and the presence of Brownian motion
Data Source
AI summary
The present invention is in the field of adhesives, in particular based on homopolymers or copolymers of compounds, for use in spray systems, in rollers, or in roll systems, or in roller coaters. These adhesives can be used in layered products characterised by the relation between layers, such as products comprising layers having different or the same physical, chemical or physicochemical properties, such as in foam bonding industry.