Water-Resistant PVC Floorboard Glue and Isolation Layer
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Solution Overview
Problem
Existing PVC self-adhesive floorboards face issues with plasticizer migration causing loss of stickiness and difficulty in removal, and lack water-resistant functionality, as the glue becomes ineffective when wet.
Innovation Solution
A PVC self-adhesive floorboard design featuring a water-resistant glue composition with styrene-isoprene-styrene block copolymer, C5 hydrogenated petroleum resin, cycloalkyl rubber extender oil, and hindered phenol antioxidant, along with an isolation layer and release paper, which prevents plasticizer migration and maintains stickiness even when exposed to water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hot-melt adhesive is used without isolation layers, then the floorboard can be bonded to the ground, but the plasticizer drifts away causing loss of stickiness and leaves glue imprint difficult to erase
Solution Approach 1:
The patent introduces an isolation layer composed of non-plasticized PVC material positioned between the plasticized PVC floorboard and the hot-melt adhesive. This intermediary layer acts as a barrier that prevents plasticizer molecules from migrating from the floorboard through the adhesive to the ground, thereby maintaining adhesive stickiness and preventing permanent glue imprints while still allowing effective bonding.
Solution Approach 2:
The isolation layer is implemented as a thin film of non-plasticized PVC material that is flexible enough to conform to the floorboard surface but sufficiently dense to block plasticizer migration. This thin film structure provides effective plasticizer barrier protection without adding significant thickness or rigidity to the overall floorboard assembly.
2Reliability
If traditional hot-melt adhesive is used, then bonding function is provided, but the glue loses stickiness when wet and lacks water-resistant function
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive by formulating it with water-resistant additives and hydrophobic components. This changes the adhesive's chemical properties to repel water molecules, preventing water from penetrating the adhesive bond and causing loss of stickiness. The adhesive maintains its bonding strength even in wet environments through these compositional parameter changes.
3Strength
If a large number of plasticizer is contained in the PVC floorboard, then flexibility is improved, but plasticizer drifts away causing gelatinization and loss of stickiness
Solution Approach 1:
The non-plasticized PVC isolation layer serves as a mediator that physically blocks the diffusion path of plasticizer molecules. The floorboard can contain high levels of plasticizer for flexibility, but the isolation layer prevents these plasticizers from migrating outward, effectively containing them within the floorboard matrix while maintaining the desired flexible properties.
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 solution effectively blocks plasticizer migration, maintains glue stickiness, and allows for easy removal without residue, while providing enhanced water-resistance by restoring adhesion upon air-drying.
Implementation Method 1
an isolation layer (6) between the main body layer (10) and the water-resistant glue (7)... The plasticizer is blocked and not be drifted away to the water-resistant glue to react with it by adding an isolation layer between the main body layer and the water-resistant glue
Implementation Method 2
water-resistant glue with better water-resistant function. Even it is put into water, stickiness can be restored as long as it is air-dried
Data Source
Figure 1
AI summary
A self-adhesive floorboard with water-resistant glue comprises from a top to a bottom sequentially a main body layer, an isolation layer and the water-resistant glue, wherein each component proportion of component composition of the water-resistant glue based on a weight percentage is: 34-38% for a styrene-isoprene-styrene block copolymer, 46.4-50.4% for C5 hydrogenated petroleum resin, 13-17% for cycloalkyl rubber extender oil and 0.5-0.6% for a hindered phenol antioxidant. The isolation layer between the main body layer and the water-resistant glue is a PVC film of OPHR. The water-resistant glue of the PVC self-adhesive floorboard with the water-resistant glue is provided with a water-resistance function, and can prevent a plasticizer from drifting away from the PVC floorboard to affect stickiness of the water-resistant glue.