Print Patterns Research Articles

Multiscale Fast Fourier Transform homogenization of additively manufactured fiber reinforced composites from component-wise description of morphology

The process-structure–property relationship in short-fiber reinforced composites made in Fused Filament Fabrication (FFF) remains inadequately understood, much trial-and-error and extensive testing is required to use these materials for load-bearing applications. As a consequence, the largely empirical design process has hindered the adoption of this technology, notably due to the lack of reliable structural analysis capability. In order to surpass the limitations of mechanical property prediction using simplified artificial microstructures, this work demonstrates the decisive advantage of using geometries obtained directly from imaging of printed specimen instead. The analysis of μCT images is performed via a purpose-built extraction tool called OpenFiberSeg, yielding profound insight into the process-structure relation. The use of real microstructures is shown to considerably improve the mechanical behavior prediction capability via dual-scale FFT-based homogenization, bringing relative error margins below 5%, for full anisotropic description. It also becomes possible to investigate the effect of processing parameters such as nozzle diameter and printing pattern on morphological properties and on mechanical behavior, revealing the magnitude of the spatial variation of local properties. The combination of experimental and simulation enables insight that is not accessible to either alone. Original imaging data and source code are made publicly available.

Effect of printing patterns on pore-related microstructural characteristics and properties of materials for 3D concrete printing using in situ and ex situ imaging techniques

3D printed samples have the unique feature of being layered and laminated to form a structure. The pore distribution characteristics around layers and filaments differ from cast specimens and significantly affect the mechanical properties. To produce high-quality 3D printed elements in terms of structural integrity and long-term performance, it is essential to understand their microstructural characteristics both during the printing process and after curing. In this paper, an in situ imaging analysis technique is proposed to examine the effects of printing patterns on pore-related characteristics and their correlation with the mechanical properties of 3D printed concrete. The interfilament voids of fresh 3D printed specimens, one of the most important factors affecting the mechanical properties, are investigated using in situ images obtained during the printing process and through an ex situ image analysis using X-ray micro-computed tomography. Additionally, the spatial distributions of pores in entire printed prisms after one-day curing are obtained by ex situ imaging analysis. Through combining in situ and ex situ analyses, it was found that the changes in pore distribution during hardening are different depending on the printing patterns. The characteristics of interfilament voids significantly impact the performance of the printed sample, resulting from the anisotropy of the pore distributions. The obtained results provide insight into a real-time image-based microstructural monitoring technology for 3D concrete printing, which can be utilized to suggest the optimal printing patterns for the purpose.

Lip Prints as an Early Indicator of Different Malocclusions

ntroduction: The goal of the current investigation was to see if there was any correlation between skeletal malocclusions and lip print patterns. Settings and Design: Hospital based, prospective, observational, cross-sectional study. Meterials and Methods: The study was conducted on 120 subjects, divided into 3 groups Skeletal Class I, Class II, and Class III based on ANB angle, Beta angle, and Wits. For the assessment of lip print patterns, they were classifi ed according to the Tsuchihashi classification system. Statistical analysis: The chi-square test was used to study diff erences in the groups. Results: It was noted that the most prevalent lip pattern was Type I while; the least was the Type V pattern. A Type III lip pattern was absent. There was a signifi cant correlation between Type I lip pattern and Skeletal Class III malocclusion. Also, there were signifi cant gender diff erences in lip print patterns in skeletal class I malocclusion with no diff erences in skeletal class II and class III malocclusion. Conclusion: Lip prints can be a useful aid in predicting the type of skeletal malocclusion as they develop early in life, therefore, can be successfully used for preventative and interceptive orthodontic procedures. Hence, lip prints can be used as early detectors of skeletal malocclusions. Key Messages: Since the craniofacial skeleton and lips print both develop at the same embryonic stage, developmental variables that result in malocclusions may also be refl ected in the lip print patterns.

CHEILOSCOPY: STUDY OF PATTERN OF LIP PRINTS AMONG MBBS STUDENTS

Objective: This study was conducted to classify and evaluate the patterns of lip prints and their variations in adult population. Methods: The study was conducted on 200 MBBS students of age group of 18–23 years at the Department of Forensic Medicine and Toxicology, Amritsar, including 100 males and 100 females. Lip color was applied on lips, and lip prints were taken using a strip of cellophane tape on its glued portion. Data thus obtained were compiled, scrutinized, and analyzed to find different patterns. Lip prints of each subject were divided into four quadrants and recognized as per Suzuki and Tsuchihashi’s Classification. Results: The most common type of lip print pattern among 200 subjects was found to be Type III 28.37% cases, which was followed by Type I 19.75% cases, this was followed by Type I’ and Type IV 16.25% cases each. Type II was in 14.87% cases. The least common type of lip print pattern was found to be Type V in 4.5% cases. Conclusion: The study concluded type III to be the most predominant pattern overall in the study population. There was no gender differentiation seen with respect to both sexes as the type III pattern was found most prevalent in both females and males.

Control methodology for tensioned web considering thermal behavior in roll-to-roll manufacturing systems

The roll-to-roll manufacturing system is utilized for processing flexible webs into functional films, offering high productivity through continuous multi-stage processing. In the converting span, which encompasses coating, printing, and drying processes, precise tension control and appropriate tension settings are crucial to ensure the quality of the final product. Particularly during the drying process, where solvent removal occurs, thermal deformation of the web induces additional elongation, amplifying the impact of tension on coating layer quality and printing patterns. Consequently, the drying process necessitates more accurate tension control compared to other span, necessitating the application of feedforward control that considers web thermal deformation. However, the current tension control logic employs an imprecise temperature distribution within the dry span as an input, resulting in inadequate tension control performance and defects such as uneven coating layers and registration errors. This research presents the development of a feedforward tension controller that employs Finite Element Method (FEM)-based web temperature distribution inputs to enhance tension control performance during the drying span. The tension control performance was compared and analyzed based on the drying span web temperature prediction method, affirming that higher accuracy in predicting the web temperature distribution leads to improved tension control performance. Experimental results from an industrial-scale roll-to-roll system demonstrate that the proposed model enhances tension control accuracy during the drying process by 27.76% compared to the existing control logic. Furthermore, the effectiveness of the tension control logic in enhancing the surface quality of functional layers was confirmed through surface quality analysis using solid oxide fuel cell (SOFC) electrolyte layers.

(Invited) Opening Twisted Molecular Chains of High Solid Content Screen Printable Ink for Screen-Printed Low-Tortuosity Electrodes

Reducing the tortuosity of electrodes is an efficient technique for enhancing the charge transfer inside electrodes and boosting the fast-charging capabilities of lithium-ion batteries for electric vehicles. Compared to reported complex methods, screen printing is facile, economical, and printing pattern controllable. More importantly, the roll-to-roll screen printing equipment can be integrated into the existing electrode production system, allowing for the industrialization of low-tortuosity electrodes. However, the absence of screen-printable inks with a high solid content restricts the ink transfer volume per printing, lowering production efficiency and raising the price of screen-printed electrodes. By integrating rheological characteristics analysis, X-ray computed tomography characterization, and coarse-grained molecular dynamics (CGMD) simulation, we are able to recognize and illustrate the relevance of the molecular chain state in high-solid-content ink for screen printability. Additionally, we propose and develop a unique preparation procedure for producing high-solid-content screen-printable inks. In addition, the electrochemical performance of screen-printed electrodes was evaluated in order to enclose the importance of electrode micromorphology. This finding lays the door for the industrialization of screen-printable inks with high solid content and encourages additional research into screen-printed architectures with functional electrodes.In this work, we demonstrated for the first time that the molecular chains within high-solid-content inks should be untangled to obtain outstanding screen printability. Specifically, the twisted molecular chains serve as extra networks that drag certain particles within the electrode ink onto the mesh, hence diminishing its screen printability. Therefore, we suggest a two-step approach for opening the twisted molecular chains of inks with a high solid content of 60%. Employing this type of ink, the mass loading per printing layer elevates to about 5 times greater than the existing cathode inks. After opening the twisted chains, the LiNi0.6Mn0.2Co0.2O2 cathode ink exhibited a lower viscosity, a faster thixotropic recovery, and superior screen printability than the ink containing twisted chains. Furthermore, due to the improved internal architectural integrity of screen-printed electrodes printed by the excellent screen-printability of ink, the electrode printed with optimized inks displayed a 33% larger charge capacity at 6C with a mass loading of 6.5 mg/cm2 than that produced with chains-twisted ink. In addition, based on the fundamental of the two-step approach, we present optimization approaches for altering screen-printable inks for a variety of circumstances. This idea could promote the coupling of screen printing with the production of functional electrodes and could be utilized for the production of screen-printable inks for all fields.

Digital printing image generation method based on style transfer

Digital printing has been widely used in textile printing production. In the process of designing digital printing patterns, an image generative model is needed to assist in obtaining more diversified patterns. However, the current model involves large storage space and high computing cost, which affects the promotion of digital printing customized production. To solve the problem, this article proposes a digital printing image generation method based on style transfer. Firstly, a style transfer method based on exact feature distribution matching is constructed to realize the accurate matching from image content to style features. And a balanced loss function is used to enhance the universality of the proposed method. Furthermore, knowledge distillation is introduced to compress the method proposed to reduce the hardware requirements when processing high-resolution digital printing images. Finally, a segmented training strategy is proposed to solve the performance degradation caused by model compression. The experimental results show that when processing images with a resolution of 3000 × 3000, the storage capacity of the model is only 2.68 MB and only 0.20 TFLOPs is required. The maximum processing resolution is more than 8K. The pattern obtained by this model is of high quality and can meet the needs of digital printing production.

Finger print patterns distribution among diabetics and non-diabetics in western Uganda population

Background: Dactyloscopy is a branch of dermatoglyphics (the study of epidermal ridges) which involves assessment and classification of fingerprint patterns for identification. All fingerprint patterns are laid down permanently from the third month of the intra-uterine life and they remain unchanged throughout the life. This is also the time when all organs in the body are finalizing their development. Therefore, a positive association of the dermatoglyphic features with different diseases like diabetes, mongolism, schizophrenia and leprosy have been well documented in the literature. The aim of the present study was to evaluate the dermatoglyphic patterns and the specific variations which may be used as a valuable diagnostic tool for early detection of diabetes mellitus. Methods: This was a prospective cross-sectional study, a total of 150 diabetic subjects and 150 non- diabetics (control) were selected from the KIUTH Western Uganda and their fingerprints were taken by the Indian ink method. The print patterns including whorls, arches, ulnar and radial loops were analysed and the variations were cross-tabulated between sex, the side of the hand and pattern distribution indexes. Data was analysed using SPSS version 26 and Dankmeijer's index and Furuhata's index were used to assess variability of the fingerprint patterns. Chi square tests was used to test for significance in variations at a confidence interval of 95%. Results and conclusion: Ulnar loops were the most predominant patterns among diabetic subjects at 35.2% followed closely by whorls at 35.1%. The most common pattern were whorls found in both hands of females at 21% (315/1500), whilst the most common pattern for male group were whorls at 17.5% (262). However, some fingers such as the ring finger completely lacked an arch pattern in both groups. The increase in arches was strongly supported by a significant increase in Dankmeijer’s index. The presence of high number of ulnar loops can therefore maybe used as an early indicator of type two diabetes.

A bio-inspired solution to alleviate anisotropy of 3D printed engineered cementitious composites (3DP-ECC): Knitting/tilting filaments

Widely reported anisotropy in 3D printed cementitious structures has been a primary concern to structural integrity, especially for fiber-reinforced cementitious material, e.g., engineered cementitious composites (ECC). To alleviate the anisotropy present in 3D printed ECC (3DP-ECC), two innovative printing patterns, “knitting” and “tilting” filaments, were proposed, mimicking the natural crossed-lamellar structure of conch shells. 3D spatial paths were designed to allocate tensile/flexural resistance to multiple directions and to create an interwoven interface system to strengthen the structure. Four-point bending tests loading from three different directions were conducted. It was found that knitted and tilted filaments revealed superior or comparable bending performance to cast ECC in two favorable orientations. Furthermore, flexural performance in the weakest orientation was notably improved by knitting and tilting, with up-to-179% increases in flexural strength compared with that of parallel filaments. This novel approach holds great promise in alleviating anisotropy of 3DP-ECC without introducing additional reinforcement.

Effect of FDM printing patterns on mechanical properties of ABS

PurposeThe purpose of this study is to investigate how the amount of material used and printing parameters affect the mechanical and water sorption properties of acrylonitrile butadiene styrene printed parts.Design/methodology/approachThe specimens were printed using different printing parameters such as shell number, infill pattern and printing orientation, while accounting for the amount of material used. The mechanical properties of the printed parts were then evaluated using tensile, compression and flexural tests, along with sorption tests.FindingsThe results revealed that the maximum tensile stress of 31.41 MPa was obtained when using 100% infill and a horizontal printing orientation. Similarly, the maximum flexural strength and compression of 40.5 MPa and 100.7 MPa, respectively, were obtained with 100% infill. The printing orientation was found to have a greater impact on mechanical behavior compared to the number of shells or infill patterns. Specifically, the horizontal printing orientation resulted in specimens with at least 25% greater strength compared to the vertical printing orientation. Furthermore, the relationship between the amount of material used and strength was evident in the tensile and flexural tests, which showed a close correlation between the two.Originality/valueThis study’s originality lies in its focus on optimizing the amount of material used to achieve the best strength-to-mass ratio and negligible water infiltration. The findings showed that specimens with two shells and a 60% infill density exhibited the best strength-to-mass ratio.

Inkjet 4D Print: Self-folding Tessellated Origami Objects by Inkjet UV Printing

We propose Inkjet 4D Print, a self-folding fabrication method of 3D origami tessellations by printing 2D patterns on both sides of a heat-shrinkable base sheet, using a commercialized inkjet ultraviolet (UV) printer. Compared to the previous folding-based 4D printing approach using fused deposition modeling (FDM) 3D printers [An et al. 2018], our method has merits in (1) more than 1200 times higher resolution in terms of the number of self-foldable facets, (2) 2.8 times faster printing speed, and (3) optional full-color decoration. This paper describes the material selection, the folding mechanism, the heating condition, and the printing patterns to self-fold both known and freeform tessellations. We also evaluated the self-folding resolution, the printing and transformation speed, and the shape accuracy of our method. Finally, we demonstrated applications enabled by our self-foldable tessellated objects.

Light Distribution in 3D-Printed Thermoplastics.

Daylight distribution is an essential performance parameter for building facades that aim to maximize user comfort while maintaining energy efficiency. This study investigates the feasibility of using 3D-printed thermoplastic to improve daylight distribution and transmission. To identify how geometry influences light distribution and transmission, 12 samples with various patterns were robotically fabricated. In a physical simulation of spring, summer, and winter, a robotic arm was used to direct light onto the samples in both the vertical and horizontal print pattern directions. In addition, three samples of conventional facade materials, including a polycarbonate panel, a polycarbonate sheet, and a single sheet of glass, were compared with the 3D-printed samples. All samples were examined and compared using high dynamic range imaging to qualitatively characterize luminance. The data analysis demonstrated that 3D-printed geometry can successfully generate customizable diffusive light distribution based on the needs of the user. Furthermore, the results showed that the vertical pattern direction had higher light transmission values than the horizontal pattern direction.

Multi-scale model to simulate stress directionality in laser powder bed fusion: Application to thin-wall part failure

In this study, line heat inputs are lumped to improve the computational efficiency while preserving stress directionality in laser powder bed fusion (LPBF). The lumped hybrid line (LHL) model predicts part distortion accurately within 10 µm of the experimental error in reasonable time. The effects of part geometry and scanning strategies on part distortion and failure during LPBF of thin-wall components are evaluated. Eight different printing patterns including different vector lengths and interlayer scan rotations for five different part lengths are studied. Simulation results show that the compressive stresses in the longitudinal and build directions create buckling, which limits subsequent layer deposition. This causes in-process part failure called the limiting build height (LBH) effect. A strong correlation between the vector length and residual stresses is shown. Longer vector lengths generate smaller compressive residual stresses along the build direction while inter-layer scan rotations homogenize the internal stresses in the scanning plane. Increasing the vector length and introducing scan rotations are useful processing strategies to improve the LBH. Moreover, part failure can be mitigated by varying the part geometry. Increasing the part thickness reduces the susceptibility to buckling and increases the LBH, whereas part length alters the failure mode.

Elimination of Drying‐Dependent Component Deviation Using a Composite Solvent Strategy Enables High‐Performance Inkjet‐Printed Organic Solar Cells with Efficiency Approaching 16%

AbstractInkjet printing (IJP) is a roll‐to‐roll (R2R) compatible fabrication method for large‐area organic solar cells (OSCs). Unlike the coating process, the films are formed through droplet leveling and merging during IJP, and the pre‐deposited droplets are partly dissolved by the subsequent droplets. Such a process yields undesired printing pattern lines, especially in large‐area printed films. This study reveals that such a temperature‐dependent “drying lines‐related” phase separation morphology has caused component variation in the organic blend films, which leads to an obvious inhomogeneity of photocurrent in the printed OSCs. Such a phenomenon is attributed to the solubility difference between organic donor and acceptor molecules in the main printing solvent. A composite solvent strategy of ortho‐dichlorobenzene (oDCB)/trimethylbenzene (TMB) and tetralin (THN) is developed to solve this problem. The introduction of THN suppresses the formation of printing drying lines during high‐temperature printing due to the preferential miscibility of acceptor in THN, leading to the efficiency improvement to 13.96% and 15.78% for the binary and ternary devices. In addition, the 1 cm2 device with a disruptive pattern gives an efficiency of 12.80% and a certificated efficiency of 12.18%.

Research into the effects of pigment printing parameters on sensorial comfort to guide garment designers in the apparel industry

The printing process, which is an aesthetically significant process subprocess in garment design, has the potential to affect the physical properties and sensory comfort of the fabric. Due to its low cost and very fast process period and the fact that it is environmentally conscious, pigment printing is widely used in the textile industry. This study it’s aimed to guide the designers in the selection of printing type for piece printing according to the fabric type by considering the print area and print pattern in the apparel industry. For this purpose, the effects of commonly used pigment printing pastes on the physical properties and sensorial comfort in knit fabrics of different constructions were studied. To that end, two different patterns were applied to three knit fabrics with different constructions by using three different pigment printing methods to assess several features of the fabrics, namely, print quality, air permeability, roughness, compressibility and bending. As a result of this study, it was observed that the printing application method and print pattern design have a significant impact on the handle properties of the fabric. Consequently, it was revealed that it is necessary to take into account the printing application method and print pattern design in the process of printed clothing design. Among the print types evaluated in this study, the best print type was determined in terms of sensorial comfort and physical properties. In addition, suggestions were made on the issues to be considered during the print design of print types with worse comfort and physical properties.

Research on the printing mechanism of electrohydrodynamic satellite-free droplets in pulsed voltage

Electrohydrodynamic (EHD) drop-on-demand (DOD) printing in pulsed voltage is a very promising technology for additive manufacturing at the micro- and nanoscale. However, jet/meniscus retraction during DOD printing creates additional satellite droplets, which can lead to blurred print patterns and thus reduced print resolution. In this paper, the mechanism of satellite droplet formation in EHD DOD printing in pulsed voltage is investigated in detail for the first time. At first, the numerical model for EHD printing is established and the correctness and credibility of the numerical results are verified experimentally. After that, the three key operating parameters peak voltage, voltage duration, and bias voltage are analyzed in detail on the formation mechanism of satellite droplets. The operating phase diagram without satellite droplets is proposed. Finally, the electric Bond number BoE and Ohnesorge number Oh are proposed for the detailed analysis of the physical parameters of the liquid on the generation of satellite droplets, and the prediction model of satellite droplet size is presented. The mechanism of satellite droplet formation in EHD printing is revealed, which provides a theoretical basis for the stable printing of satellite-free droplets and advances its application in high-resolution additive manufacturing.

3D printing of cementitious mortar with milled recycled carbon fibres: Influences of filament offset on mechanical properties

This study investigates the effects of layer offset on the mechanical strengths of 3D-printed mortar containing milled recycled carbon fibres (rCF). Compared to previous works, the printing scale of carbon-fibre reinforced mortar is increased to move closer to the stage of practical engineering application. For different fibre content, 1.5 vol% is recommended as the optimum fibre dosage for the mortar printing. Three degrees of layer offset are designed for the unidirectional printing pattern, including 0%, 25% and 50% of the filament width as the nozzle drifting distance. X-ray micro-computed tomography analysis demonstrates the internal pore structures in printed specimens consist of channel pores between filaments and micro pores within filaments. The channel pores are generally less geometrically regular than micro pores. Increasing the offset degree leads to improved compressive and flexural strengths along different loading directions. The increase in the compressive strength is more substantial along the direction of layer deposition and lateral expansion compared to the printing direction. Printed specimens with 25% and 50% layer offset also exhibit a much lower level of anisotropy in compression than those without offset. As the degree of layer offset rises, the total porosity decreases and the volume percentage of micro pores in total pores increases, thereby rendering less severe stress concentration around defects and strengthening the mechanical performance of printed specimens. The experiment results show the 3D-printed mortar containing milled rCF with layer offset, normally serving for self-sensing purpose, has the potential to achieve decent mechanical properties for large-scale industrial printing.

Sputtering Plasma Effect on Zinc Oxide Thin Films Produced on Photopolymer Substrates.

This work presents a post-cured treatment alternative for photopolymer substrates considering the plasma produced via the sputtering process. The sputtering plasma effect was discussed, analyzing the properties of zinc/zinc oxide (Zn/ZnO) thin films deposited on photopolymer substrates, with and without ultraviolet (UV) treatment as a post-treatment process, after manufacturing. The polymer substrates were produced from a standard Industrial Blend resin and manufactured using stereolithography (SLA) technology. After that, the UV treatment followed the manufacturer's instructions. The influence of the sputtering plasma as an extra treatment during the deposition of the films was analyzed. Characterization was performed to determine the microstructural and adhesion properties of the films. The results showed the effect of plasma as a post-cured treatment alternative: fractures were found in thin films deposited on polymers with previous UV treatment. In the same way, the films showed a repetitive printing pattern due to the phenomenon of polymer shrinkage caused by the sputtering plasma. The plasma treatment also showed an effect on the thicknesses and roughness values of the films. Finally, according to VDI-3198 standards, coatings with acceptable adhesion failures were found. The results provide attractive properties of Zn/ZnO coatings on polymeric substrates produced by additive manufacturing.

Experimental study and hybrid optimization of material extrusion process parameters for enhancement of fracture resistance of biodegradable nanocomposites

Among the additive manufacturing processes, the material extrusion (ME) is the most popular and affordable technique in production of a wide range of products, from prototypes to the final products, for different industrial sectors. The most popular raw material in this process is the biodegradable polylactic acid (PLA) polymer that offers ease of production in relatively low price and wide applications in synthesis of medical proteases. However, the mechanical strength of fabricated samples and their resistance against the fracture loadings, which are critical for components synthesized for medical applications, are strongly dependent on the ME process parameters and the composition of the base material. Therefore, this study is aimed to address both the strengthening mechanisms of inorganic CaCO3 nanoadditives in the PLA matrix and the influence of ME process parameters on the fracture resistance of fabricated samples. To this aim, the PLA/CaCO3 nanocomposite filaments have been produced by mix-blending/extrusion technique and were employed to fabricate tensile and fracture test samples in ME process under different sets of parameters, including printing speed, layer thickness, filling ratio and printing pattern, determined by Taguchi L27 orthogonal array. The fracture experiments were conducted on a uniaxial tensile test machine using a specially designed fixture that makes the application of mixed-mode loading on fracture samples possible. The results of fracture toughness of specimens were employed as input data to model the response of fabricated samples and to determine the ME parameter levels and nanoparticle concentrations for maximum fracture resistance of fabricated samples based on a hybrid algorithm of artificial neural network and ant colony optimization (ANN/ACO). Differential scanning calorimetry was used to characterize the thermal features (i.e. glass transition, crystallization and melting temperatures) as well as the degree of crystallization of ME samples. Scanning electron microscopy of fracture surfaces were employed to study the influence of ME parameters and CaCO3 nanoadditives on the characteristics of fracture of 3D printed specimens under various modes of loading. Overall, the results showed that the effects of ME parameters on the fracture behavior of 3D printed samples are highly interconnected and, in the case of a semicrystalline polymer, are highly dependent on the physical characteristics of the fabrication process, including the heat transfer and crystallization rate of the matrix.

Polymer pretreatment to control the distribution of dye inks on bicomponent interwoven fabric with different weaves to improve inkjet printing

Pretreatment is an effective way to increase the dye utilization rate and improve quality of inkjet printing products. The hydroxypropyl methyl cellulose has been shown to be effective in pretreating for fabrics before inkjet printing. However, pretreatment of hydroxypropyl methyl cellulose (HPMC) on fabrics with different weaves has not been systematically studied. Three kinds of cotton/polyamide interwoven fabrics with different weaves were investigated in this study. The results shown that hydroxypropyl methyl cellulose could form the polymer film on the fabric surface, whether the yarns were loose or tight. The fibers or yarns of the fabrics with different weaves could be connected by HPMC. The pores on the fabric surfaces were blocked, and the fabric surface became more hydrophobic. The ink which spread to the far end of the yarn was reduced, while the ink which was absorbed by HPMC and the ink which migrated to the adjacent fibers were increased. More inks were left in the initial position. After HPMC pretreatment, the shape formed by the ink drops on the fabric was more similar to that formed by natural diffusion and was not affected by the fabric weaves. Therefore, the inkjet printing patterns on fabrics pretreated with HPMC were clearer. HPMC pretreatment was effective for cotton/polyamide fabrics with different weaves. The HPMC pretreatment could reduce the use of dyes, improve dye utilization, and is of great significance to environmental protection.