The influence of PVA water soluble film on the quality of llaundry capsule was discussed from three aspects:appearance,manufacture and use.The basic properties of several mainstream PVA membranes on the market related...The influence of PVA water soluble film on the quality of llaundry capsule was discussed from three aspects:appearance,manufacture and use.The basic properties of several mainstream PVA membranes on the market related to laundry capsules were evaluated.The results show that the mist value of the film affects the appearance of the capsules.The higher the mist value is,the worse the transparency of the capsules is.The mechanical properties of the film affect the shape of the capsules,the tensile strength>35 Mpa,elongation>400%,modulus>50 Mpa,the shape of the capsules is more three-dimensional;The water solubility of the film can affect the production of the capsules,and the production of the capsules is smooth when the film breaking speed is greater than 20~30 s and the dissolution speed is 40~60 s.The film compatibility index reflects the effect of the capsules washing machine.The shorter the dissolution time of the compatibility,the less the residue of the capsules after washing.展开更多
In this paper cotton hollow yarns were obtained from the core spun yams which were produced on a little modified conventional experiment ring frame with water soluble staple PVA yam as the core. For comparison, yams w...In this paper cotton hollow yarns were obtained from the core spun yams which were produced on a little modified conventional experiment ring frame with water soluble staple PVA yam as the core. For comparison, yams with same linear densities, same twists of the sheath, different linear densities, different twist directions of the core were prepared. The results show that the tensile strengths of the hollow yarns decrease first, then increase and decrease again, at last the tensile strength trends to reach a steady state with the soluble PVA core extraction proceeding. And when the sheath linear densities of the core spun yams are constant, their twist and twist direction are same as that of the core it will be easier to remove the core of the yam with a higher core size. When the linear densities of the sheath and the core are all constant, the twists of them are same, it will be easier to remove the core of the yam with a different twist direction of core to the sheath.展开更多
文摘The influence of PVA water soluble film on the quality of llaundry capsule was discussed from three aspects:appearance,manufacture and use.The basic properties of several mainstream PVA membranes on the market related to laundry capsules were evaluated.The results show that the mist value of the film affects the appearance of the capsules.The higher the mist value is,the worse the transparency of the capsules is.The mechanical properties of the film affect the shape of the capsules,the tensile strength>35 Mpa,elongation>400%,modulus>50 Mpa,the shape of the capsules is more three-dimensional;The water solubility of the film can affect the production of the capsules,and the production of the capsules is smooth when the film breaking speed is greater than 20~30 s and the dissolution speed is 40~60 s.The film compatibility index reflects the effect of the capsules washing machine.The shorter the dissolution time of the compatibility,the less the residue of the capsules after washing.
基金Supported by the Foundation of Tianjin Science and Technology Commission (No.043104711)
文摘In this paper cotton hollow yarns were obtained from the core spun yams which were produced on a little modified conventional experiment ring frame with water soluble staple PVA yam as the core. For comparison, yams with same linear densities, same twists of the sheath, different linear densities, different twist directions of the core were prepared. The results show that the tensile strengths of the hollow yarns decrease first, then increase and decrease again, at last the tensile strength trends to reach a steady state with the soluble PVA core extraction proceeding. And when the sheath linear densities of the core spun yams are constant, their twist and twist direction are same as that of the core it will be easier to remove the core of the yam with a higher core size. When the linear densities of the sheath and the core are all constant, the twists of them are same, it will be easier to remove the core of the yam with a different twist direction of core to the sheath.
