A process is provided for identifying a production and/or commercial history of a silk fiber or a product made therefrom.

A coolant includes a refrigerant, a porous plate-shaped heat insulator, and an enclosure in which the refrigerant and the heat insulator are enclosed in a sealed state, and the heat insulator has a thermal conductivity per unit area of 300 W/(K.Math.m.sup.2) or less and a thickness equal to or greater than 0.5 mm and equal to or less than 10.0 mm.

A coolant includes a refrigerant, a porous plate-shaped heat insulator, and an enclosure in which the refrigerant and the heat insulator are enclosed in a sealed state, and the heat insulator has a thermal conductivity per unit area of 300 W/(K.Math.m.sup.2) or less and a thickness equal to or greater than 0.5 mm and equal to or less than 10.0 mm.

A fluorine-free carbon chain hydrophobic fabric, and its preparation method and application. A fabric is sequentially soaked in an alkali liquor and an acid liquor to obtain a pretreated fabric; the pretreated fabric then reacts with bromoacetyl bromide to obtain a treated fabric; the treated fabric then reacts with 1,2-bis(p-toluenesulfonyl) hydrazine to obtain a diazotized fabric; the diazotized fabric reacts with a diazoacetate monomer to obtain a fluorine-free carbon chain hydrophobic fabric; and the diazoacetate monomer is butyl diazoacetate, hexyl diazoacetate, octyl diazoacetate, dodecyl diazoacetate, tetradecyl diazoacetate or octadecyl diazoacetate. According to the scheme, diazoacetate is used as a monomer, and different fiber grafting modification processes are used, so as to form different structures on the fiber surface; and the comprehensive properties such as thermal stability, air permeability and breaking strength of the finished fabric are tested, the heat resistance and breaking strength of the finished fabric are reduced, and the air permeability is good.

A fluorine-free carbon chain hydrophobic fabric, and its preparation method and application. A fabric is sequentially soaked in an alkali liquor and an acid liquor to obtain a pretreated fabric; the pretreated fabric then reacts with bromoacetyl bromide to obtain a treated fabric; the treated fabric then reacts with 1,2-bis(p-toluenesulfonyl) hydrazine to obtain a diazotized fabric; the diazotized fabric reacts with a diazoacetate monomer to obtain a fluorine-free carbon chain hydrophobic fabric; and the diazoacetate monomer is butyl diazoacetate, hexyl diazoacetate, octyl diazoacetate, dodecyl diazoacetate, tetradecyl diazoacetate or octadecyl diazoacetate. According to the scheme, diazoacetate is used as a monomer, and different fiber grafting modification processes are used, so as to form different structures on the fiber surface; and the comprehensive properties such as thermal stability, air permeability and breaking strength of the finished fabric are tested, the heat resistance and breaking strength of the finished fabric are reduced, and the air permeability is good.

A carbene co-grafted modified fabric, a preparation method therefor, and an application thereof. Diazotized cotton fabric is sequentially subjected to a reaction with tert-butyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric; or diazotized cotton fabric is sequentially subjected to a reaction with phenyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric. Taking phenyl diazoacetate and tert-butyl diazoacetate as monomers, co-grafting into a cotton fabric is respectively performed with octyl diazoacetate carbene, a surface structure having low surface energy and good roughened morphology is constructed on a fiber surface, and excellent water repellency is consequently provided.

A carbene co-grafted modified fabric, a preparation method therefor, and an application thereof. Diazotized cotton fabric is sequentially subjected to a reaction with tert-butyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric; or diazotized cotton fabric is sequentially subjected to a reaction with phenyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric. Taking phenyl diazoacetate and tert-butyl diazoacetate as monomers, co-grafting into a cotton fabric is respectively performed with octyl diazoacetate carbene, a surface structure having low surface energy and good roughened morphology is constructed on a fiber surface, and excellent water repellency is consequently provided.

A carbene co-grafted modified fabric, a preparation method therefor, and an application thereof. Diazotized cotton fabric is sequentially subjected to a reaction with tert-butyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric; or diazotized cotton fabric is sequentially subjected to a reaction with phenyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric. Taking phenyl diazoacetate and tert-butyl diazoacetate as monomers, co-grafting into a cotton fabric is respectively performed with octyl diazoacetate carbene, a surface structure having low surface energy and good roughened morphology is constructed on a fiber surface, and excellent water repellency is consequently provided.

A carbene co-grafted modified fabric, a preparation method therefor, and an application thereof. Diazotized cotton fabric is sequentially subjected to a reaction with tert-butyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric; or diazotized cotton fabric is sequentially subjected to a reaction with phenyl diazoacetate and octyl diazoacetate to obtain the carbene co-grafted modified fabric. Taking phenyl diazoacetate and tert-butyl diazoacetate as monomers, co-grafting into a cotton fabric is respectively performed with octyl diazoacetate carbene, a surface structure having low surface energy and good roughened morphology is constructed on a fiber surface, and excellent water repellency is consequently provided.

A fluorine-free carbon chain hydrophobic fabric, and its preparation method and application. A fabric is sequentially soaked in an alkali liquor and an acid liquor to obtain a pretreated fabric; the pretreated fabric then reacts with bromoacetyl bromide to obtain a treated fabric; the treated fabric then reacts with 1,2-bis(p-toluenesulfonyl) hydrazine to obtain a diazotized fabric; the diazotized fabric reacts with a diazoacetate monomer to obtain a fluorine-free carbon chain hydrophobic fabric; and the diazoacetate monomer is butyl diazoacetate, hexyl diazoacetate, octyl diazoacetate, dodecyl diazoacetate, tetradecyl diazoacetate or octadecyl diazoacetate. According to the scheme, diazoacetate is used as a monomer, and different fiber grafting modification processes are used, so as to form different structures on the fiber surface; and the comprehensive properties such as thermal stability, air permeability and breaking strength of the finished fabric are tested, the heat resistance and breaking strength of the finished fabric are reduced, and the air permeability is good.