TPU Graphic Overlay and TPU Membrane Switches
author: John
2022-08-22
TPU GraphicTPU Graphic
Is TPU material?
TPU stands for Thermoplastic polyurethanes. It is completely imperfect textile, and it is not leather. TPU overcame PVC, PU leather and PU layer, which is a major breakthrough in waterproofing and permeable surface material applications. TPU does not have the properties of rubber and common plastics, but also has excellent comprehensive physical and chemical properties, because it is a new type of polymer protection material between rubber and plastics.
TPU stands for Thermoplastic polyurethanes. It is completely imperfect textile, and it is not leather. TPU overcame PVC, PU leather and PU layer, which is a major breakthrough in waterproofing and permeable surface material applications. TPU does not have the properties of rubber and common plastics, but also has excellent comprehensive physical and chemical properties, because it is a new type of polymer protection material between rubber and plastics.
TPU main component is polymorphic and polymorphic, hardness 60HA-85HD, wear-resistant, oil-resistant, transparent, good elasticity, widely used in daily goods, sports goods, toys, decorative materials, etc. , Non-flame retardant TPU can be replaced by PVC, which is more than enough to meet international safety requirements.
It should be a flexible material, with low room temperature and low temperature for glassing, fracture elongation >50%, and high polymer material with good resilience after removal of external force. Polyurethane elastic body is one of the most special types of elastic body, the hardness of the polyurethane is extremely high, the performance is high, and the polycyclic elastic body is a type of plastic material.
Thermoplasticization, the chemical structure has a little connection, its molecular basis is linear, but there is a constant physical connection, this kind of polymorphism is called TPU.
TPU characteristics
Key properties of TPU:
1. Increased hardness: Different proportions of different TPU through the process of modification, different hardness products can be obtained, and the accompanying hardness increases, the product retains good strength and abrasion resistance. TPU-like flexibility and flexibility. The tensile strength of rubber is usually 1~10Mpa, TPU is 10~1000Mpa, plastic material such as ABS, PC, POM is 1000~10000Mpa. Hardness range equivalent to TPU, from Shore A 60 to Shore D 85, and high strength with uniform hardness range.
1. Increased hardness: Different proportions of different TPU through the process of modification, different hardness products can be obtained, and the accompanying hardness increases, the product retains good strength and abrasion resistance. TPU-like flexibility and flexibility. The tensile strength of rubber is usually 1~10Mpa, TPU is 10~1000Mpa, plastic material such as ABS, PC, POM is 1000~10000Mpa. Hardness range equivalent to TPU, from Shore A 60 to Shore D 85, and high strength with uniform hardness range.
2. High mechanical strength: TPU product approval ability, outstanding anti-crash and anti-vibration performance.
3. Outstanding cold resistance: Compared to TPU glass, the temperature changes are very low, and it maintains good strength, flexibility, and other physical properties below 35 degrees below zero. TPU has a wide temperature range, such as -40~120℃, has flexibility, and does not require an increasing plasticizer.
4. Good processing performance: TPU can use the usual thermoplastic material processing methods such as processing, such as injection molding, extruding, rolling and so on. At the same time, TPU and some polymer materials can be processed together to obtain performance-matching composite alloys.
5, oil-proof, water-proof, anti-bacteria. TPU has good resistance to oils (vegetable oils, animal and vegetable oils and lubricants) and polysolvents.
6. Good recyclability.
7. TPU has good weather resistance and excellent high radiation resistance.
Well-known, TPU-like abrasion resistance, tear resistance, and excellent flexural strength;
Introducing three major performances of TPU
This article introduces TPU performance comprehensively in three aspects: mechanical performance, physical performance and environmental performance.
This article introduces TPU performance comprehensively in three aspects: mechanical performance, physical performance and environmental performance.
1. Mechanical performance:
TPU elastic physical mechanical performance main comprehensive: hardness, stretching strength, compressive performance, tearing strength, rolling resistance and abrasion resistance, bending resistance, etc., and TPU elastic plastic mechanical performance, except for this little performance, still available Extremely high cutting strength and impact.
(a) Hardness: Hardness is an index of material resistance deformation and scratch damage resistance. TPU hardness normal use Shore A (Shore A) and Shore D (shore D) hardness measurement, for Shore A, for Shore A, for Shore D, for Shore D. The hard grade content in the main factors of the TPU structure is determined, the hard grade content is high, and the hardness of the TPU continues to increase. After the increase in hardness, other performance changes occur in TPU, increase in tensile strength and breaking strength, increase in thermal stress and stress (load capacity), decrease in elongation rate, increase in density and dynamic heat, and increase in environmental performance. TPU hardness given temperature presence constant relationship. From room temperature cooling down to sudden temperature change (-4~-12℃), the hardness is not obvious;
(b) the relationship between hardness, constant elongation and elongation rate, and the relationship between hardness and breaking strength; Adhesive TPU hardness increase, 100% constant tensile stress and 300% constant tensile stress rapid increase, elongation rate decrease. The main reason for this is the increase in hard stage content: high hard stage content, where the hard stage is easily formed next crystal or crystal structure increases physical interaction quantity and limited material deformation. When the material is deformed, it is necessary to have high stress, and at the same time the elongation rate decreases. The relationship between TPU hardness and breaking strength, the hardness increases, the breaking strength quickly increases, the reason is also similar to the quantitative explanation.
A very diverse combination of TPU-like combination performance. However, due to the current design and industrial production process, due to the mutual restrictions on the raw materials (multi-component blending, poly-diisotric acid and additives), it is very difficult to use and use genuine products due to high-end application research.
After our company's unremitting efforts, and through multiple tests conducted by our engineering and quality control departments, we have successfully applied TPU material to various medical panels (Ming) as well as membrane switches. As for the production of panels and switches, including embossing and stamping shapes, we have solved the related technical problems and are able to produce them on a large scale.
TPU is an environmentally friendly material that is harmless to the human body and the environment.
TPU is an environmentally friendly material that is harmless to the human body and the environment.
