In this paper, 3 kinds of bio-based PVC leather with the same color base cloth surface treatment process but different textures are developed. Yuanshun Network Scheme 1 has the lowest sustainable ratio, because the suede base fabric cannot use **PET. From the perspective of gram weight, scheme 2 has the smallest weight and the best lightweight effect; Option 1 has the largest weight and the worst lightweighting effect.
The effect of perforation on the performance of bio-based PVC leather, high-end car seats have ventilation needs, so perforation needs to be carried out in the middle area of the seat. According to the conventional leather punching scheme, the bio-based PVC leather with a 140g m2 weight of 100%** PET base cloth was used to select the hole type shown in Figure 4 for drilling, and the mechanical properties after punching were tested.
The bio-based PVC leather with a gram weight of 140g m2 made of 100%** PET base cloth does not meet the target requirements after punching, such as breaking strength, tear strength, permanent elongation, and suture fatigue resistance, and there are risks such as cracking, bulging, and loose surface in the perforated area of the seat.
This is because the properties such as abrasion resistance and noise of PVC leather are related to the formulation of the PVC surface treatment layer, and the wear-resistant formula has better coating performance and is less affected by the texture. Therefore, it is necessary to improve the mechanical properties of the material after punching, and develop bio-based PVC leather that can meet the punching performance. Measures such as replacing the base cloth and adding composite materials can improve the performance after punching. In view of this, four performance improvement schemes are developed in this paper.
The four schemes can meet the mechanical properties of bio-based PVC leather after punching. From the perspective of mechanical properties, compared with the original scheme, scheme 1 has the highest mechanical property improvement value, and scheme 3 has the lowest mechanical property improvement value. In terms of sustainable proportions, the highest sustainable ratio is in option 4, where the warp knitted base fabric used is made of 95%** PET.